CN110908159A - Display panel, display device and control method of display panel - Google Patents

Abstract

The invention discloses a display panel, a display device and a control method of the display panel. The display panel includes: the camera comprises a display screen and a camera positioned below the display screen; the liquid crystal layer is positioned between the camera and the display screen; the polaroid is arranged on one side of the display screen, which is far away from the liquid crystal layer; and the control system is used for changing the forms of the liquid crystal molecules in the liquid crystal layer so as to enable the liquid crystal molecules to be arranged to form a convex lens structure during the working period of the camera, and during the non-working period of the camera, the included angle between the long axis of the liquid crystal molecules and the orthographic projection of the long axis of the liquid crystal molecules on the polaroid is within a preset range. The invention can improve the performance of the display panel.

Description

Display panel, display device and control method of display panel

Technical Field

The present invention relates to the field of display technologies, and in particular, to a display panel, a display device, and a control method of the display panel.

Background

In order to meet the requirements of people on high performance, portability and the like of electronic products, display screens are entering a flexible era, and OLED screens are increasingly widely applied due to the excellent characteristics of low power consumption, flexibility, lightness, thinness, durability and the like. But because the performance of the current camera under the screen is limited by the low light transmittance of the display screen material, the shooting effect is still to be improved.

Disclosure of Invention

The invention aims to provide a display panel, a display device and a control method of the display panel, so that the performance of the display panel is improved.

To solve the above technical problem, an embodiment of the present invention provides a display panel, including: the device comprises a display screen and a camera positioned below the display screen; the liquid crystal layer is positioned between the camera and the display screen; the polaroid is arranged on one side of the display screen, which is far away from the liquid crystal layer; the control system is used for changing the form of liquid crystal molecules in the liquid crystal layer so that the liquid crystal molecules form a convex lens structure during the working period of the camera, and during the non-working period of the camera, the included angle between the long axis of the liquid crystal molecules and the orthographic projection of the long axis of the liquid crystal molecules on the polaroid is within a preset range.

Through set up the liquid crystal layer between display screen and camera, the form of control liquid crystal molecule makes the liquid crystal molecule form convex lens structure during camera work, and ambient light gets into the camera through assembling of convex lens structure to improve the daylighting volume of camera, improve the shooting effect. In addition, the focal length of the convex lens structure formed by the liquid crystal molecules is adjustable, so that shooting with different depths of field can be realized, and the shooting imaging quality is further improved. During the period that the camera does not work, the camera area can be ensured to be in a dark state by adjusting the included angle of the long axis of the liquid crystal molecules and the orthographic projection of the long axis of the liquid crystal molecules on the polaroid, and then the contrast of the brightness of the display panel is balanced.

In addition, the control system comprises an acquisition module and a processing module, wherein the acquisition module is used for acquiring whether the camera is in a working period; the processing module is used for changing the form of the liquid crystal molecules based on the acquisition result of the acquisition module; the processing module comprises a first processing unit and a second processing unit; the first processing unit is used for changing the form of liquid crystal molecules to enable the liquid crystal molecules to form a convex lens structure during the working period of the camera; the second processing unit is used for controlling the included angle between the long axis of the liquid crystal molecules and the orthographic projection of the long axis of the liquid crystal molecules on the polaroid within a preset range during the period that the camera does not work; the preset range is 10-90 degrees; or the included angle is 90 deg.. The processing module changes the form of liquid crystal molecules according to the acquisition result of the acquisition module so that the display panel has good performance all the time, on one hand, during the working of the camera, the convex lens structure can improve the lighting quantity of the camera and improve the image shooting effect, on the other hand, during the working of the camera, the included angle is controlled within the range of 10-90 degrees, so that part of the light outside the screen entering the display screen is absorbed by the polaroid, the camera area is in a dark state, and the display effect of the display panel is improved.

In addition, during the working period of the camera, the control system is also used for controlling the central point of the lighting component of the camera to be positioned at a preset position, and the preset position is between the convex lens structure and the focus of the convex lens structure on the side far away from the display screen; the control system also comprises a first detection module for detecting whether the central point of the lighting component of the camera is positioned at a preset position; when the central point of the lighting component of the camera is not at the preset position, the processing module changes the form of the liquid crystal molecules again to enable the central point of the lighting component of the camera to be located at the preset position; or, the control system further comprises an adjusting module, and when the central point of the lighting component of the camera is not at the preset position, the adjusting module is used for adjusting the position of the central point of the lighting component of the camera, so that the adjusted central point of the lighting component of the camera is located at the preset position. The central point of the lighting component of the camera has a higher lighting amount when being at a preset position, and the processing module changes the form of liquid crystal molecules again according to the detection result of the first detection module, so that the central point of the lighting component of the camera is always positioned at the preset position, and the camera is ensured to have a good shooting effect all the time. Or the adjusting module adjusts the position of the camera according to the detection result of the first detecting module to enable the central point of the lighting component of the camera to be located at the preset position all the time, and the camera is guaranteed to have a good shooting effect all the time.

In addition, the control system also comprises a second detection module for detecting whether the included angle is within a preset range; and when the included angle is not in the preset range, the processing module is also used for changing the shape of the liquid crystal molecules again to enable the included angle to be in the preset range. When the included angle is not within the preset range, the processing module changes the shape of the liquid crystal molecules again to enable the included angle to be within the preset range all the time, and the display panel is guaranteed to have a good display effect all the time.

In addition, the orthographic projection of the camera on the display screen is positioned in the orthographic projection of the liquid crystal layer on the display screen; preferably, the convex lens structure has an adjustable maximum curvature, and the central point of the light collecting part of the camera is located between the focus of the convex lens structure having the adjustable maximum curvature and the convex lens structure. The position relation between the liquid crystal layer and the camera is limited, more off-screen light rays can be gathered to enter the camera, and the shooting effect is further improved. In addition, the converged light rays passing through the convex lens structure can intersect at the focus and then diverge, and the central point of the lighting part of the limited camera is positioned between the focus of the convex lens structure with the adjustable maximum curvature and the convex lens structure, so that the camera is guaranteed to have higher lighting amount all the time no matter how the curvature of the convex lens structure changes.

In addition, the liquid crystal layer comprises a plurality of sub-liquid crystal layers which are sequentially stacked; preferably, during the operation of the camera, the control system is further configured to control a central point of the lighting component of the camera to be located between the convex lens structure of the sub-liquid crystal layer closest to the camera and the focus of the convex lens structure of the sub-liquid crystal layer closest to the camera, and the plurality of sub-liquid crystal layers may form a plurality of stacked convex lens structures, so that the focal length can be adjusted in a wider range and the depth adjustment range can be further improved.

The embodiment of the invention also provides a display device comprising the display panel.

The embodiment of the invention also provides a control method of the display panel, which comprises the following steps: acquiring whether the camera is in a working period or not; and changing the form of liquid crystal molecules in the liquid crystal layer so that the liquid crystal molecules are arranged to form a convex lens structure during the working period of the camera, and the included angle between the long axis of the liquid crystal molecules and the orthographic projection of the long axis of the liquid crystal molecules on the polaroid is in a preset range during the non-working period of the camera. The display panel can change the form of the liquid crystal molecules according to the working state of the camera so that the display panel has good performance all the time, and when the camera is in the working period, the form of the liquid crystal molecules is controlled to enable the liquid crystal molecules to form a convex lens structure and adjust the focal length of the convex lens structure, so that the lighting amount of the camera is improved, shooting with different depths of field is realized, and the shooting effect is improved. When the camera is in a non-working period, the camera area can be ensured to be in a dark state by adjusting the included angle of the long axis of the liquid crystal molecules and the orthographic projection of the long axis of the liquid crystal molecules on the polaroid, and then the contrast of the brightness of the display panel is improved.

In addition, during camera operation, still include: detecting whether the central point of a lighting component of the camera is located at a preset position, wherein the preset position is between the convex lens structure and a focus of the convex lens structure on the side far away from the display screen; when the central point of the lighting component of the camera is not at the preset position, the form of the liquid crystal molecules is changed, so that the central point of the lighting component of the camera is located at the preset position. The central point of the lighting component of the camera is controlled to be always located at the preset position according to the detection result, so that the camera is guaranteed to have higher lighting amount and good shooting effect all the time.

In addition, during the camera does not work, still include: and detecting whether the included angle is within a preset range, and changing the form of the liquid crystal molecules to enable the included angle to be within the preset range when the included angle is not within the preset range. And the included angle is always within a preset range according to the detection result, so that the display panel is ensured to have a good display effect all the time.

Compared with the prior art, the technical scheme provided by the embodiment of the invention has the following advantages:

in the embodiment of the invention, the liquid crystal layer is arranged between the display screen and the camera, and during the operation of the camera, the form of the liquid crystal molecules is changed to enable the liquid crystal molecules to form the convex lens structure.

The convex lens structure can adjust the transmission direction of the light outside the screen irradiated on the convex lens structure, so that the light outside the screen is more deviated to the camera, more light outside the screen enters the lighting part of the camera, the problem that the lighting quantity of the camera is not enough under the screen is solved, and the shooting effect is improved.

Meanwhile, the focal length of the convex lens structure formed by the liquid crystal molecules can be adjusted randomly within a certain range, and each focal length corresponds to different cameras to shoot the depth of field, so that shooting with different depths of field is realized, and the performance of the cameras and the shooting imaging quality are further improved.

In addition, during the period that the camera does not work, the included angle between the long axis of the liquid crystal molecules and the orthographic projection of the long axis of the liquid crystal molecules on the polaroid is controlled to be within a preset range. By adjusting the included angle between the long axis of the liquid crystal molecules and the orthographic projection of the long axis of the liquid crystal molecules on the polaroid within the preset range, the outside light irradiates the camera and is reflected by the camera to form reflected light, and the polaroid can absorb most of the reflected light so as to enable the camera area to be in a dark state and balance the light-dark contrast of the display screen.

In a word, this scheme can improve the daylighting volume of camera, improves the display effect of camera shooting effect and display screen.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the display panel of FIG. 1 cut along the YY1 direction during the operation of the camera;

FIG. 3 is a schematic view of a shape of the convex lens structure of FIG. 2;

FIG. 4 is a schematic view of another shape of the convex lens structure of FIG. 2;

FIG. 5 is a schematic cross-sectional view of the display panel of FIG. 1 cut along the YY1 direction during the operation of the camera;

FIG. 6 is a schematic cross-sectional view of the display panel of FIG. 1 cut along the YY1 direction during the period when the camera is not in operation;

fig. 7 is a block diagram of a control system in a display panel according to an embodiment of the present invention;

FIG. 8 is a block diagram of a control system in a display panel according to another embodiment of the present invention;

fig. 9 is a flowchart of a control method of a display panel according to an embodiment of the invention.

Detailed Description

As is known in the art, the performance of the existing display panel still needs to be improved. Specifically, among the prior art, leading camera needs gather the outer light of screen through the display screen and shoots, and is not good or the outer light of screen is insufficient when the display screen light transmissivity, can lead to the photo luminance of shooting lower, and the shooting effect is poor. Especially, to flexible OLED display screen, flexible basement such as PI of display screen is difficult to satisfy the transmittance and temperature toleration requirement simultaneously, generally presents faint yellow, consequently leads to under the screen camera daylighting volume not enough, influences the effect of shooing.

In addition, the area of the display panel corresponding to the camera usually has a large transmittance, and the other areas of the display panel have a low transmittance, so that when the transmittance difference between the two areas is very large, the brightness of the display panel is uneven during the display period, which affects the display effect.

In order to solve the above problems, embodiments of the present invention provide a display panel, in which a liquid crystal layer is disposed between a display screen and a camera, and during operation of the camera, the liquid crystal molecules are controlled to form a convex lens structure, and light outside the screen enters the camera through convergence of the convex lens structure, so as to improve the lighting amount of the camera and improve the shooting effect. Meanwhile, the focal length of the convex lens structure formed by the liquid crystal molecules is adjustable, so that shooting with different depths of field can be realized, and the shooting imaging quality is further improved.

In addition, during the period that the camera does not work, the display screen area corresponding to the camera can be ensured to be in a dark state by adjusting the included angle of the long axis of the liquid crystal molecules and the orthographic projection of the long axis of the liquid crystal molecules on the polaroid, and the light and shade contrast of the display screen is balanced.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present invention, and the embodiments may be mutually incorporated and referred to without contradiction.

Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention; FIG. 2 is a schematic cross-sectional view of the display panel of FIG. 1 cut along the YY1 direction during the operation of the camera; FIG. 6 is a schematic cross-sectional view of the display panel of FIG. 1 cut along the YY1 direction during the period when the camera is not in operation; fig. 7 is a block diagram of a control system in a display panel according to an embodiment of the present invention.

Referring to fig. 1, fig. 2, fig. 6 and fig. 7, in the present embodiment, thedisplay panel 100 includes: adisplay screen 102 and acamera 106 located below thedisplay screen 102; theliquid crystal layer 104, theliquid crystal layer 104 locates betweencamera 106 anddisplay screen 102; a polarizingplate 103, the polarizingplate 103 being disposed on a side of thedisplay panel 102 remote from theliquid crystal layer 104; and thecontrol system 110 is used for changing the form of theliquid crystal molecules 105 in theliquid crystal layer 104 to enable theliquid crystal molecules 105 to form theconvex lens structure 123 during the operation of thecamera 106, and controlling the included angle between thelong axis 133 of theliquid crystal molecules 105 and the orthographic projection of thelong axis 133 of theliquid crystal molecules 105 on thepolaroid 103 to be within a preset range during the non-operation of thecamera 106.

Since theliquid crystal layer 104 is disposed between thedisplay screen 102 and thecamera 106, and during the operation of thecamera 106, theliquid crystal molecules 105 inside theliquid crystal layer 104 are changed in morphology so that theliquid crystal molecules 105 form theconvex lens structure 123. Theconvex lens structure 123 can adjust the transmission direction of the off-screen light irradiated on the convex lens structure, so that the off-screen light is more deviated to thecamera 106, more off-screen light enters thecamera 106, the problem that the lighting amount of the off-screen camera 106 is insufficient is solved, and the shooting effect is improved. Meanwhile, the focal length of theconvex lens structure 123 formed by theliquid crystal molecules 105 can be adjusted within a certain range, and each focal length corresponds to different shooting depths of field, so that shooting with different depths of field is realized, and the performance of thecamera 106 and the shooting imaging quality are further improved.

In addition, when thecamera 106 does not work, by adjusting the included angle between thelong axis 133 of theliquid crystal molecules 105 and the orthographic projection of thelong axis 133 of theliquid crystal molecules 105 on thepolarizer 103 to be within a preset range, the off-screen light irradiates thecamera 106 and is reflected by thecamera 106 to form reflected light, and thepolarizer 103 absorbs most of the reflected light, so that thecamera 106 area is in a dark state, and the light-dark contrast of thedisplay screen 102 is balanced.

The display panel provided in the present embodiment will be described in detail below with reference to the accompanying drawings.

The display panel may be a CRT display panel, an LCD display panel, a PDP display panel, an LED display panel, an OLED display panel, or a Micro-LED display panel, and in this embodiment, the display panel is an OLED display panel as an example.

Thedisplay screen 102 includes afirst display area 101 and asecond display area 201, and thecamera 106 is located below thefirst display area 101 and disposed toward thefirst display area 101.

Thefirst display area 101 is used for thecamera 106 to capture the off-screen light reflected by the shot scenery or people and the like through thefirst display area 101 of thedisplay screen 102 when thecamera 106 is in operation.

In this embodiment, the light transmittance of thesecond display region 201 is smaller than that of thefirst display region 101. On one hand, the off-screen light reflected by the shot scenery or people can penetrate through thefirst display area 101 to reach thecamera 106 positioned below thefirst display area 101, so that the shooting quality is improved, and on the other hand, the manufacturing cost of thedisplay panel 100 is reduced.

It should be noted that the area of thefirst display region 101 may be larger than the orthographic projection area of thecamera 106 on thefirst display region 101, or equal to or smaller than the orthographic projection area of thecamera 106 on thefirst display region 101.

Thepolarizer 103 is disposed on a side of thedisplay panel 102 away from theliquid crystal layer 104, and thepolarizer 103 is used for absorbing the reflected light rays inside the panel, thereby improving the display effect of thedisplay panel 102.

In this embodiment, thepolarizer 103 includes alinear polarizer 153 and a quarter-wave plate 143, the optical axis of the quarter-wave plate 143 is at an angle of 45 ° to the optical axis of thelinear polarizer 153, and the quarter-wave plate 143 is located between thelinear polarizer 153 and thedisplay panel 102.

In the present embodiment, thepolarizing plate 103 functions to include: the off-screen light first irradiates thelinear polarizer 153, wherein the off-screen light perpendicular to the optical axis of thelinear polarizer 153 cannot be absorbed through thelinear polarizer 153, and the off-screen light parallel to the optical axis of thelinear polarizer 153 irradiates the quarter-wave plate 143 through thelinear polarizer 153; the quarter-wave plate 143 rotates the polarization direction of the light outside the screen by 45 ° to irradiate onto the device under the quarter-wave plate 143, the polarization direction of the reflected light reflected back to the quarter-wave plate 143 by the device is rotated by 45 ° again to irradiate onto thelinear polarizer 153, and at this time, the polarization direction of the reflected light is perpendicular to the optical axis of thelinear polarizer 153 and is absorbed, that is, the light outside the screen entering thedisplay screen 102 cannot be reflected back to human eyes, and thedisplay screen 102 cannot display an object outside the screen, thereby improving the display effect of thedisplay screen 102.

TheLC layer 104 is located between thecamera 106 and thedisplay screen 102. Specifically, theliquid crystal layer 104 is located between thecamera 106 and thefirst display region 101, and the off-screen light passes through thefirst display region 101 and theliquid crystal layer 104 in sequence to be collected by thecamera 106.

Theliquid crystal layer 104 hasliquid crystal molecules 105 therein, and the form of theliquid crystal molecules 105 can be controlled by changing a voltage applied to theliquid crystal layer 104. Theliquid crystal molecules 105 have an optical rotation action, that is, a deflection angle of light irradiated thereto can be changed.

Specifically, the orthographic projection of thecamera 106 on thedisplay screen 102 is within the orthographic projection of theLC layer 104 on thedisplay screen 102. The above-mentioned positional relationship between theliquid crystal layer 104 and thecamera 106 is limited, which is beneficial to collecting more light outside the screen to enter thecamera 106, and further improves the shooting effect. It is understood that in other embodiments, the orthographic projection of the camera on the display screen and the orthographic projection of the liquid crystal layer on the display screen may be completely coincident, or the orthographic projection of the camera on the display screen is larger than the orthographic projection of the liquid crystal layer on the display screen.

In this embodiment, thecontrol system 110 includes an obtainingmodule 111 and aprocessing module 120.

The acquiringmodule 111 is used for acquiring whether thecamera 106 is in the working period. Specifically, the obtainingmodule 111 is configured to obtain an operating signal of thecamera 106, and when the operating signal of thecamera 106 is received, it indicates that thecamera 106 is in an operating period; when the operation signal of thecamera 106 is not received, it indicates that thecamera 106 is not in the non-operation period.

Theprocessing module 120 is configured to change the form of theliquid crystal molecules 105 based on the obtaining result of the obtainingmodule 111, so as to adjust the form of theliquid crystal molecules 105 in time according to different states of thecamera 106. Specifically, when the acquisition result of theacquisition module 111 is that thecamera 106 is in the working period, theprocessing module 120 changes theliquid crystal molecules 105, so that theliquid crystal molecules 105 are arranged to form theconvex lens structure 123; when the acquisition result of theacquisition module 111 is that thecamera 106 is in the non-operation period, theprocessing module 120 changes theliquid crystal molecules 105, so that the included angle between thelong axis 133 of theliquid crystal molecules 105 and the orthographic projection of thelong axis 133 of theliquid crystal molecules 105 on thepolarizer 103 is within a preset range.

Specifically, theprocessing module 120 changes the morphology of theliquid crystal molecules 105 by changing the voltage applied to theLC layer 104.

In this embodiment, theprocessing module 120 may include afirst processing unit 121 and asecond processing unit 122.

When the light outside the screen is insufficient or the light transmittance of thefirst display region 101 is low, the photographing effect of thecamera 106 may be deteriorated. In this embodiment, thefirst processing unit 121 is configured to change theliquid crystal molecules 105 inside theliquid crystal layer 104 to align theliquid crystal molecules 105 to form theconvex lens structure 123 during the operation of thecamera 106. Theconvex lens structure 123 changes the transmission direction of the light outside the screen, so that the light is more deflected to thecamera 106, thereby increasing the lighting amount of thecamera 106 and improving the shooting effect.

Specifically, referring to fig. 2, theconvex lens structure 123 may have only one convex surface, and the convex surface may face thecamera 106; alternatively, referring to fig. 3, theconvex lens structure 123 may have only one convex surface, and the convex surface faces thedisplay screen 120; alternatively, thelenticular structure 123 with reference to fig. 4 may also have two convex surfaces, one convex surface facing thecamera 106 and the other convex surface facing thedisplay screen 102.

It should be noted that the off-screen light passing through theconvex lens structure 123 may have two cases, one is divergent light, i.e., light that never intersects, and the other is convergent light, i.e., light that intersects at thefocal point 124, but in either case, theconvex lens structure 123 changes the transmission angle of the off-screen light to make it more biased toward thecamera 106.

In addition, thefirst processing unit 121 may further adjust the focal length of theconvex lens structure 123 by changing the voltage applied to theliquid crystal layer 104, that is, the focal length of theconvex lens structure 123 is adjustable, so that shooting with different depths of field may be achieved, and the shooting imaging quality may be further improved.

Theconvex lens structure 123 has an adjustable maximum curvature, and a center point of thelight collecting part 116 of thecamera 106 is located between thefocus 124 of theconvex lens structure 123 having the adjustable maximum curvature and theconvex lens structure 123. Thelighting member 116 of thecamera 106 is a member for collecting light from thecamera 106, and is generally located on the side of thecamera 106 close to theliquid crystal layer 104.

The shape of theconvex lens structure 123 can be adjusted by changing the voltage, the shape of theconvex lens structure 123 is changed, the curvature and the focal length are changed accordingly, and the larger the curvature is, the smaller the focal length is; for thelc layer 104, theconvex lens structure 123 has a curvature within an adjustable maximum curvature range regardless of the change in shape. The tunable maximum curvature refers to the maximum curvature of theconvex lens structure 123 located inside theliquid crystal layer 104, and the focal length of theconvex lens structure 123 under the maximum curvature is the smallest.

In this embodiment, it is considered that the off-screen light converged by theconvex lens structure 123 intersects thefocal point 124 and then diverges, that is, the off-screen light located in front of thefocal point 124 tends to intersect, and the light density is relatively high, while the off-screen light located in back of thefocal point 124 tends to diverge, and the light density is relatively low, so that the central point of thelighting component 116 of thecamera 106 is limited to be located between thefocal point 124 of theconvex lens structure 123 having the adjustable maximum curvature and theconvex lens structure 123, thereby ensuring that the central point of thelighting component 116 of thecamera 106 is always located in front of thefocal point 124 and has a relatively high lighting amount no matter how the curvature of theconvex lens structure 123 changes.

It is appreciated that theLC layer 104 may be a single layer or a multi-layer structure, and when theLC layer 104 is a plurality of layers, it includes a plurality of sub-LC layers stacked in sequence. In this embodiment, theliquid crystal layer 104 is exemplified by a two-layer sub-liquid crystal layer, and as shown in fig. 5, theliquid crystal layer 104 includes: the firstliquid crystal layer 204 and the secondliquid crystal layer 304 are sequentially stacked.

Specifically, during the operation of thecamera 106, thecontrol system 110 controls the firstliquid crystal layer 204 to form the firstconvex lens 223 and the secondliquid crystal layer 304 to form the secondconvex lens 323, so that a double-layer convex lens structure can be formed, thereby adjusting the focal length in a wider range and further improving the depth-of-field adjustment range.

Specifically, the center point of thelight collection member 116 of thecamera head 106 is located between theconvex lens structure 323 formed by the secondliquid crystal layer 304 and thefocal point 324 of theconvex lens structure 323 formed with the secondliquid crystal layer 304.

In other embodiments, the display panel may further include at least three sub-liquid crystal layers stacked, and a central point of the light-collecting part of the camera is located between a convex lens structure formed by the liquid crystal layer closest to the camera and a focal point of the convex lens structure formed by the liquid crystal layer closest to the camera, which is beneficial to further improving the light collection amount of the camera.

It is understood that thelenticular structure 123 is not a solid structure, but theliquid crystal molecules 105 in theliquid crystal layer 104 are changed in shape to form thelenticular structure 123 having a lenticular shape and a lenticular function.

In this embodiment, thesecond processing unit 122 is configured to change the form of theliquid crystal molecules 105 during a period when thecamera 106 is not operating, so that an included angle between thelong axis 133 of theliquid crystal molecules 105 and an orthogonal projection of thelong axis 133 of theliquid crystal molecules 105 on thepolarizer 103 is within a preset range.

During the period when thecamera 106 is not operating, since the light transmittance of thefirst display region 101 is greater than that of thesecond display region 201, thefirst display region 101 is brighter than thesecond display region 201, which causes uneven brightness of thedisplay screen 102 and poor display effect. In addition, the off-screen light irradiated to the edge of thecamera 106 is reflected back to the outside of the screen, so that thecamera 106 can be seen from thefirst display region 101, and the aesthetic property of the display panel is reduced.

In this embodiment, during the period when thecamera 106 is not operating, thesecond processing unit 122 controls the included angle between thelong axis 133 of theliquid crystal molecule 105 and the orthographic projection of thelong axis 133 of theliquid crystal molecule 105 on thepolarizer 103 to be within a preset range, the predetermined range is 10 ° to 90 °, the polarization direction of the reflected light is at an angle to the optical axis of thelinear polarizer 153, the reflected light is divided into two reflected light beams perpendicular to the optical axis of thelinear polarizer 153 and parallel to the optical axis of thelinear polarizer 153, and reflected rays perpendicular to the optical axis of the linearlypolarizing plate 153 are absorbed, reflected rays parallel to the optical axis of the linearlypolarizing plate 153 pass through thefirst display region 101, since the reflected light of a part of the off-screen light is absorbed, the sense of silhouette of thecamera 106 in thefirst display area 101 is reduced, the brightness of thefirst display area 101 is reduced, that is, thefirst display region 101 appears dark, and the contrast of thefirst display region 101 is equalized with that of thesecond display region 201. That is, the preset range is 10 ° to 90 °, for example, the included angle between thelong axis 133 of theliquid crystal molecule 105 and the orthographic projection of thelong axis 133 of theliquid crystal molecule 105 on thepolarizing plate 103 may be 20 °, 40 °, 50 °, 70 °, 85 °.

When theliquid crystal molecules 105 are perpendicular to thepolarizer 103, that is, an included angle between thelong axis 133 of theliquid crystal molecules 105 and the orthographic projection of thelong axis 133 of theliquid crystal molecules 105 on thepolarizer 103 is 90 °, at this time, theliquid crystal molecules 105 do not have an optical rotation effect, theliquid crystal molecules 105 do not change the deflection direction of the off-screen light, and the deflection direction of the reflected light reflected by thecamera 106 is not changed, so that it can be ensured that the deflection direction of the reflected light is perpendicular to the optical axis of thelinear polarizer 153 and is absorbed, the off-screen light cannot be reflected back to the outside, thefirst display area 101 on thedisplay screen 102 is in a dark state, the brightness of thefirst display area 101 is closer to that of thesecond display area 201, and the contrast of thefirst display area 101 is more balanced than that of the second display.

In addition, the user cannot see the outline of thecamera 106 through thefirst display area 101, and thefirst display area 101 cannot display an off-screen object, so that the display effect is improved.

It should be noted that, when the included angle is closer to 90 °, the optical rotation effect of theliquid crystal molecules 105 is smaller, that is, the deflection direction of the light before and after passing through theliquid crystal molecules 105 is smaller, the angle between the deflection direction of the reflected light and the optical axis of thelinear polarizer 153 is smaller, the more reflected light perpendicular to the optical axis of thelinear polarizer 153 is, the more reflected light is absorbed, the darker the dark state of thefirst display region 101 on thedisplay screen 102 is, the closer the darkness of thefirst display region 101 and the darkness of thesecond display region 201 are, and the better the display effect is.

It should be noted that the optimal display effect of thedisplay panel 100 when theliquid crystal molecules 105 are perpendicular to thepolarizer 103 is based on the premise that the optical rotation of thedisplay screen 102 to the light outside the display screen is small, i.e., the optical rotation of thedisplay screen 102 to the light outside the display screen is negligible, i.e., the deflection direction change of the light before and after the light passes through thedisplay screen 102 is negligible. In other embodiments, when the display screen has a large optical rotation effect on the light outside the screen, the optimal included angle may be the angle obtained by subtracting the optical rotation angle of the display screen from 90 degrees, where the optical rotation angle is an angle at which the deflection direction of the light changes from front to back of the display screen, so that the optical rotation effect of the display screen can be effectively offset, and the display effect is further improved; for example, when the substrate in the display screen is a flexible substrate such as a PI substrate, the PI substrate itself has a certain optical rotation effect.

Because theliquid crystal layer 104 is arranged between thedisplay screen 102 and thecamera 106, during the operation of thecamera 106, theliquid crystal molecules 105 in theliquid crystal layer 104 are changed to form theliquid crystal molecules 105 into theconvex lens structure 123, so that more off-screen light is converged into thecamera 106, thereby solving the problem of insufficient lighting of thecamera 106 under the screen and improving the shooting effect.

Meanwhile, thecontrol system 110 can also change the form of theliquid crystal molecules 105, so as to adjust the focal length range of theconvex lens structure 123, and each focal length corresponds to different shooting depths of field, thereby realizing shooting with different depths of field, and further improving the performance of thecamera 106 and the shooting imaging quality. And the central point of thelighting component 116 of thecamera 106 is limited to be positioned between thefocus 124 of theconvex lens structure 123 with the adjustable maximum curvature and theconvex lens structure 123, so that thecamera 106 can be ensured to have good lighting quantity all the time, and the shooting effect is further improved.

In addition, when thecamera 106 does not operate, thecontrol system 110 adjusts an included angle between thelong axis 133 of theliquid crystal molecule 105 and the orthographic projection of thelong axis 133 of theliquid crystal molecule 105 on thepolarizer 103 to be within a preset range, and thepolarizer 103 can absorb most of the reflected light of the off-screen light, so that the contour sense of thecamera 106 in thefirst display area 101 is reduced, the brightness of thefirst display area 101 is reduced, the contrast of thefirst display area 101 with respect to thesecond display area 201 is balanced, and thedisplay panel 100, the aesthetic property and the display effect are improved.

Fig. 8 is a block diagram of a display panel according to another embodiment of the present invention, and referring to fig. 8, the technical solution provided in this embodiment is substantially the same as that of the previous embodiment, and the main improvement is that: thecontrol system 210 further includes at least one of the first detectingmodule 130 and the second detectingmodule 131, and the same or corresponding portions as those in the previous embodiment can refer to the description of the previous embodiment, and are not repeated herein.

Thecontrol system 210 includes: 211 acquisition module, 220 processing module, and theprocessing module 220 includes afirst processing unit 221 and asecond processing unit 222.

In this embodiment, thecontrol system 210 further includes a first detectingmodule 130, configured to detect whether a central point of a lighting component of the camera is located at a preset position, that is, between the convex lens structure and a focus of the convex lens structure on a side away from the display screen, during the operation of the camera. Therefore, the central point of the lighting component of the camera can be always located at a preset position during the working period of the camera, the preset position is that the convex lens structure and the convex lens structure are far away from between the focuses on one side of the display screen, and the lighting effect of the camera is further improved.

In this embodiment, when it is detected that the central point of the lighting component of the camera is not at the preset position, theprocessing module 220 is configured to change the form of the liquid crystal molecule again, so as to change the curvature of the convex lens structure, and make the central point of the lighting component of the camera be at the preset position.

Specifically, thefirst processing unit 221 in theprocessing module 220 changes the shape of the liquid crystal molecules again, and further changes the curvature of the convex lens structure, so that the central point of the lighting component of the camera is located at the preset position.

It can be understood that the above is to adjust the form of the liquid crystal molecules, i.e. adjust the focus of the convex lens structure, so as to ensure that the position between the central point and the focus of the lighting part of the camera head meets the above requirements. In other embodiments, the position of the camera can be adjusted to ensure that the position between the camera and the focus meets the above requirements.

Specifically, thecontrol system 210 may further include anadjusting module 132, and when the first detectingmodule 130 detects that the central point of the lighting component of the camera is not at the preset position, the adjustingmodule 132 is configured to adjust the position of the camera, so that the adjusted central point of the lighting component of the camera is at the preset position.

In this embodiment, theprocessing module 220 may adjust the shape of the liquid crystal molecules at any time according to the detection result of the first detectingmodule 130, or theadjusting module 132 may adjust the position of the central point of the lighting component of the camera, so that the central point of the lighting component of the camera is always located at the preset position no matter how the shape of the convex lens structure changes, thereby ensuring that the camera has a good shooting effect all the time.

In addition, compared with the case that the central point of the lighting part of the camera is limited to be located between the focus of the convex lens structure with the adjustable maximum curvature and the convex lens structure in advance, in the embodiment, the shape of the convex lens can be adjusted or the position of the camera can be directly adjusted according to the position of the central point of the lighting part of the camera, so that the adjustable range of the focal length of the convex lens structure is enlarged, and the performance of the camera is further improved.

In this embodiment, thecontrol system 210 may further include a second detectingmodule 131, configured to detect whether the included angle is within a preset range, so as to determine whether the included angle between the long axis of the liquid crystal molecule and the orthographic projection of the long axis of the liquid crystal molecule on the polarizer is within the preset range, thereby further improving the display effect of the display panel.

When the second detectingmodule 131 detects that the included angle is not within the predetermined range, theprocessing module 220 is further configured to change the form of the liquid crystal molecules again to make the included angle within the predetermined range.

Specifically, thesecond processing unit 222 in theprocessing module 220 is configured to change the shape of the liquid crystal molecules again to make the included angle within the predetermined range. Thesecond processing unit 222 can adjust the forms of the liquid crystal molecules at any time according to the detection result of thesecond detection module 131, so that the included angle is always within the preset range, thereby ensuring the brightness balance of the first display area compared with the second display area, and the display panel always has a good display effect.

In the technical scheme of the display panel provided in this embodiment, theprocessing module 220 can adjust the form of the liquid crystal molecules at any time according to the detection results of thefirst detection module 130 and thesecond detection module 131, so as to ensure that the central point of the lighting component of the camera is always located at the preset position, and the included angle is always within the preset range, and finally ensure that the camera has a good shooting effect all the time and the display panel has a good display effect all the time.

In other embodiments, the display panel may include only one of the first detection module or the second detection module.

Correspondingly, the embodiment of the invention also provides a display device comprising the display panel, which comprises products or components with display functions, such as a mobile phone, a tablet personal computer, an electronic watch, a display, a digital photo frame or a navigator.

Fig. 9 is a flowchart of a control method of a display panel according to an embodiment of the invention.

Referring to fig. 9, the control method of the display panel includes:

and step 501, acquiring whether the camera is in a working period.

The camera can send a working signal during working, and whether the camera is in the working period is judged according to whether the working signal is received.

And 502, changing the form of liquid crystal molecules in the liquid crystal layer during the working period of the camera so that the liquid crystal molecules are arranged to form a convex lens structure during the working period of the camera.

When the camera is in a working period, the form of the liquid crystal molecules is changed, so that the liquid crystal molecules form a convex lens structure, light rays outside the screen are converged, the lighting quantity of the camera is increased, and the shooting effect is improved.

In one embodiment, during the operation of the camera, the method further comprises: detecting whether the central point of a lighting component of the camera is at a preset position, wherein the preset position is between the convex lens structure and a focus of the convex lens structure on the side far away from the display screen; when the central point of the lighting component of the camera is not at the preset position, the form of the liquid crystal molecules is changed, so that the central point of the lighting component of the camera is located at the preset position. The central point of the lighting component of the camera is controlled to be always located at the preset position according to the detection result, so that the camera is guaranteed to have higher lighting amount and good shooting effect all the time.

Specifically, by changing the voltage applied to the liquid crystal layer and thus changing the form of the liquid crystal molecules, i.e., the form of the liquid crystal molecules changes with the change of the electric signal, it is possible to obtain a convex lens structure satisfying the conditions by adjusting the voltage value.

In another embodiment, the position of the camera can be changed to enable the central point of the lighting component in the camera to be at a preset position, so that the camera can be ensured to have higher lighting amount and good shooting effect all the time.

And 503, changing the form of the liquid crystal molecules in the liquid crystal layer during the non-working period of the camera so that the included angle between the long axis of the liquid crystal molecules and the orthographic projection of the long axis of the liquid crystal molecules on the polaroid is within a preset range during the non-working period of the camera.

When the working signal of the camera is not received, namely the camera does not work, the form of the liquid crystal molecules is changed, so that the included angle between the long axis of the liquid crystal molecules and the orthographic projection of the long axis of the liquid crystal molecules on the polaroid is in a preset range, the display screen area corresponding to the camera is in a dark state at the moment, and the brightness of the display screen is balanced.

Further, during the camera is not in operation, still include: detecting whether the included angle is within a preset range; and when the included angle is not in the preset range, changing the shape of the liquid crystal molecules to enable the included angle to be in the preset range. And the included angle is always within a preset range according to the detection result, so that the display panel is ensured to have a good display effect all the time.

Specifically, the liquid crystal molecules are also changed in form by changing the voltage applied to the liquid crystal layer, that is, the form of the liquid crystal molecules is changed according to the change of the electric signal.

The control method provided by the embodiment can change the form of the liquid crystal molecules according to the working state of the camera, so that the display panel has good performance all the time. Specifically, when the camera is in a working period, the liquid crystal molecules are controlled to form a convex lens structure and the focal length of the convex lens structure is adjusted, so that the lighting amount of the camera is improved, shooting with different depths of field is realized, and the shooting effect is improved. When the camera is in a non-working period, the camera area can be ensured to be in a dark state by adjusting the included angle of the long axis of the liquid crystal molecules and the orthographic projection of the long axis of the liquid crystal molecules on the polaroid, and then the contrast of the brightness of the display panel is improved.

In addition, on the one hand, the central point of the lighting component of the camera can be controlled to be always located at the preset position, and therefore the camera is guaranteed to have higher lighting amount and good shooting effect all the time. On the other hand, the included angle is always in the preset range, and the display panel is guaranteed to have a good display effect all the time.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific embodiments for practicing the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.

Claims (10)

1. A display panel, comprising:

the device comprises a display screen and a camera positioned below the display screen;

the liquid crystal layer is positioned between the camera and the display screen;

the polaroid is arranged on one side of the display screen, which is far away from the liquid crystal layer;

and the control system is used for changing the form of liquid crystal molecules in the liquid crystal layer so that the liquid crystal molecules are arranged to form a convex lens structure during the working period of the camera, and the included angle between the long axis of the liquid crystal molecules and the orthographic projection of the long axis of the liquid crystal molecules on the polaroid is within a preset range during the non-working period of the camera.

2. The display panel according to claim 1, wherein the control system comprises: the acquisition module is used for acquiring whether the camera is in a working period or not; a processing module for changing the morphology of the liquid crystal molecules based on the acquisition result of the acquisition module;

preferably, the processing module comprises: the first processing unit is used for changing the liquid crystal molecular form to enable the liquid crystal molecules to be arranged to form a convex lens structure during the working period of the camera; the second processing unit is used for changing the liquid crystal molecule form during the period that the camera does not work so that the included angle between the long axis of the liquid crystal molecule and the orthographic projection of the long axis of the liquid crystal molecule on the polaroid is in a preset range;

preferably, the preset range is 10 ° to 90 °.

3. The display panel according to claim 1 or 2, wherein the control system is further configured to control a central point of a lighting component of the camera to be located at a preset position during the operation of the camera, and the preset position is between the convex lens structure and a focus of a side of the convex lens structure away from the display screen;

preferably, the control system further includes a first detection module, configured to detect whether a central point of a lighting component of the camera is located at a preset position; when the central point of the lighting component of the camera is not at the preset position, the processing module is used for changing the form of the liquid crystal molecules again to enable the central point of the lighting component of the camera to be located at the preset position; or, the control system further includes an adjusting module, and when the central point of the lighting component of the camera is not at the preset position, the adjusting module is configured to adjust the position of the central point of the lighting component of the camera, so that the adjusted central point of the lighting component of the camera is located at the preset position.

4. The display panel according to claim 1 or 2, wherein the control system further comprises a second detection module for detecting whether the included angle is within the preset range; and when the included angle is not in the preset range, the processing module is further used for changing the form of the liquid crystal molecules again to enable the included angle to be in the preset range.

5. The display panel of claim 1, wherein an orthographic projection of the camera on the display screen is within an orthographic projection of the liquid crystal layer on the display screen.

6. The display panel according to claim 1, wherein the liquid crystal layer comprises a plurality of sub-liquid crystal layers arranged in a stack; preferably, during the operation of the camera, the control system is further configured to control a central point of a lighting component of the camera to be located between the convex lens structure of the sub-liquid crystal layer closest to the camera and a focal point of the convex lens structure of the sub-liquid crystal layer closest to the camera.

7. A display device characterized by comprising the display panel according to any one of claims 1 to 6.

8. A control method of a display panel applied to the display panel according to any one of claims 1 to 6, comprising:

acquiring whether the camera is in a working period or not;

and changing the form of liquid crystal molecules in the liquid crystal layer so that the liquid crystal molecules are arranged to form a convex lens structure during the working period of the camera, and the included angle between the long axis of the liquid crystal molecules and the orthographic projection of the long axis of the liquid crystal molecules on the polaroid is within a preset range during the non-working period of the camera.

9. The control method of the display panel according to claim 8, further comprising, during operation of the camera:

detecting whether the central point of a lighting component of the camera is located at a preset position, wherein the preset position is between the convex lens structure and a focus of one side of the convex lens structure, which is far away from the display screen; when the central point of the lighting component of the camera is not at the preset position, the form of the liquid crystal molecules is changed, so that the central point of the lighting component of the camera is located at the preset position.

10. The control method of the display panel according to any one of claims 8 or 9, further comprising, during a period when the camera is not operating:

detecting whether the included angle is within the preset range or not; and when the included angle is not in the preset range, changing the form of the liquid crystal molecules to enable the included angle to be in the preset range.

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