CN109100881B - Liquid crystal display panel and display device - Google Patents

Abstract

The invention provides a liquid crystal display panel, the liquid crystal display panel includes first base plate and second base plate that is relatively set up, and insert the liquid crystal layer between the first base plate and the second base plate, the liquid crystal display panel includes a plurality of pixel units P, each pixel unit P includes display area and visual angle control area, the area of the visual angle control area is 1/4 of the area of the pixel unit P at least, the visual angle control area has visual angle control electrodes; when the visual angle control electrode does not apply voltage, the visual angle control area does not generate an electric field, and the liquid crystal display panel displays in a wide visual angle; when the visual angle control electrode applies visual angle control voltage, the visual angle control area generates a vertical electric field, and the liquid crystal display panel displays with narrow visual angle. The invention also relates to a display device.

Description

Liquid crystal display panel and display device

Technical Field

The present invention relates to the field of display technologies, and in particular, to a liquid crystal display panel with switchable wide and narrow viewing angles.

Background

A Liquid Crystal Display (LCD) has advantages of good picture quality, small size, light weight, low driving voltage, low power consumption, no radiation, and relatively low manufacturing cost, and is dominant in the field of flat panel displays.

Liquid crystal display devices are now gradually developed toward wide viewing angles, and wide viewing angles can be realized by using liquid crystal display devices of an in-plane switching mode (IPS) or a fringe field switching mode (FFS). The wide viewing angle design enables the user to see a complete and undistorted picture from all directions. However, in the current society, people pay more and more attention to protecting their privacy, and do not like to take out and share with people. In public places, the content is always expected to be kept secret when the user watches a mobile phone or browses a computer. Therefore, the display with single viewing angle mode has not been able to satisfy the user's requirement. Besides the requirement of wide viewing angle, in the situation that peep prevention is required, the display device also needs to be switched or adjusted to a narrow viewing angle mode to realize switchable display of wide and narrow viewing angles.

In the conventional viewing angle switching technology, a viewing angle switching electrode is usually disposed in a pixel structure, for example, the viewing angle switching electrode is disposed on an array substrate (TFT), and the structure can have a narrow viewing angle switching display function without affecting an aperture ratio in a wide viewing angle state, but the image quality and the contrast ratio are poor at a narrow viewing angle, and the side light leakage at the narrow viewing angle is different depending on the display picture, thereby affecting the narrow viewing angle display picture. Meanwhile, the pixel electrodes on the array substrate are strip-shaped, and the voltage difference between two adjacent pixel electrodes and the electrode on one side of the color film substrate is different, so that the phenomenon of uneven brightness of a display picture is caused.

And a visual angle control electrode on one side of the color film substrate (CF) applies a vertical electric field to the liquid crystal molecules to realize wide and narrow visual angle switching. When the wide visual angle is displayed, the visual angle control electrode does not supply voltage, and the liquid crystal display device realizes wide visual angle display. When the narrow visual angle is displayed, the visual angle control electrode supplies voltage, liquid crystal molecules tilt under the action of an electric field, the contrast of the liquid crystal display device is reduced due to light leakage, and the narrow visual angle display is finally realized. When displaying with a narrow viewing angle, the voltage applied to the viewing angle control electrode is generally an ac voltage, which causes a large load, and the coupling between the viewing angle control electrode and the pixel electrode causes image flicker and display non-uniformity (mura). In order to solve this problem, the conventional technique has been to increase the frame frequency of the liquid crystal display device to 120Hz to reduce the flicker of the screen, but this has caused a problem of excessive power consumption.

Disclosure of Invention

The invention aims to provide a liquid crystal display panel, which can realize the consistency of the brightness and the contrast of a wide and narrow visual angle, has a higher peep-proof angle and improves the overall display image quality of the liquid crystal display panel.

The technical problem to be solved by the invention is realized by adopting the following technical scheme.

A liquid crystal display panel comprises a first substrate and a second substrate which are oppositely arranged, and a liquid crystal layer clamped between the first substrate and the second substrate, wherein the liquid crystal display panel comprises a plurality of pixel units P, each pixel unit P comprises a display area and a visual angle control area, the area of the visual angle control area is at least 1/4 of the area of the pixel unit P, and the visual angle control area is provided with a visual angle control electrode; when the visual angle control electrode does not apply voltage, the visual angle control area does not generate an electric field, and the liquid crystal display panel displays in a wide visual angle; when the visual angle control electrode applies visual angle control voltage, the visual angle control area generates a vertical electric field, and the liquid crystal display panel displays with narrow visual angle.

Further, the viewing angle control area and the display area are horizontally disposed, the pixel unit P includes a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel, the first sub-pixel, the second sub-pixel and the third sub-pixel are located in the display area, the fourth sub-pixel is located in the viewing angle control area, the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel are horizontally arranged, and the fourth sub-pixel is a white or transparent sub-pixel.

Further, the viewing angle control area and the display area are vertically disposed, the pixel unit P includes a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel, the first sub-pixel, the second sub-pixel and the third sub-pixel are disposed in the display area, the fourth sub-pixel is disposed in the viewing angle control area, the first sub-pixel, the second sub-pixel and the third sub-pixel are horizontally disposed and are respectively disposed vertically with the fourth sub-pixel, and the fourth sub-pixel is a white or transparent sub-pixel.

Furthermore, the viewing angle control is arranged on the second substrate and is positioned on one side of the fourth sub-pixel facing the liquid crystal layer, the viewing angle control electrode is a strip electrode, and an area on the first substrate corresponding to the viewing angle control electrode is a blank area.

Furthermore, the viewing angle control area includes a first electrode and a second electrode disposed in a vertically corresponding manner, one of the first electrode and the second electrode is a viewing angle control electrode, the first electrode is disposed on the first substrate, the second electrode is disposed on the second substrate, and both the first electrode and the second electrode are strip-shaped electrodes.

Furthermore, a first electrode is disposed on the first substrate, the first electrode is used as a viewing angle control electrode, the viewing angle control electrode is of a comb-shaped structure, the viewing angle control electrode includes a plurality of comb-tooth portions and a connecting portion vertically connected to the comb-tooth portions, and the connecting portion and the comb-tooth portions are disposed on the same layer.

Furthermore, the viewing angle control area comprises a fourth pixel electrode and a second electrode which are correspondingly arranged up and down, the fourth pixel electrode is arranged on the first substrate and serves as a viewing angle control electrode, the second electrode is arranged on the second substrate, a first common electrode is further arranged below each viewing angle control electrode, the viewing angle control area further comprises a viewing angle control line and a common line which are arranged on the first substrate, the display area comprises a plurality of scanning lines and a plurality of data lines which are arranged on the first substrate, the viewing angle control electrode is connected with the scanning lines and the viewing angle control lines which are close to the viewing angle control electrodes through second thin film transistors, and the first common electrode is connected with the scanning lines and the common lines which are close to the first common electrodes through third thin film transistors.

Further, the display area further includes a second common electrode disposed on the first substrate, and the second common electrodes corresponding to the display area of each pixel unit P are connected to each other in the vertical direction.

Each display area further comprises a first pixel electrode, a second pixel electrode and a third pixel electrode which are arranged on the first substrate, the first pixel electrode, the second pixel electrode and the third pixel electrode are connected with a scanning line and a data line which are close to the pixel electrodes through first thin film transistors, the first pixel electrode, the second pixel electrode and the third pixel electrode are located above the second common electrode, the first pixel electrode, the second pixel electrode, the third pixel electrode and the visual angle control electrode have the same patterning structure, and insulating layers are arranged among the first pixel electrode, the second pixel electrode, the third pixel electrode, the visual angle control electrode, the first common electrode and the second common electrode.

The invention also provides a display device comprising the liquid crystal display panel.

According to the liquid crystal display panel and the display device, each pixel unit P is divided into a display area and a visual angle control area, the area of the visual angle control area is at least one fourth of that of the pixel unit P, the visual angle control area is provided with the visual angle control electrode, the deflection of liquid crystal molecules in the visual angle control area is controlled by applying voltage to the visual angle control electrode, the visual angle control electrode does not apply voltage in a wide visual angle mode, the visual angle control area does not generate an electric field, so that the liquid crystal molecules are light-proof, and the display area generates a fringe electric field to form wide visual angle display of the display area; under the narrow visual angle mode, the display area still is the fringe field display, but the visual angle control voltage is applyed to the visual angle control electrode in the visual angle control area, produces vertical electric field between first base plate and second base plate, and the liquid crystal molecule is in vertical state, and when watching liquid crystal display panel at the side, the lateral light leak appears in the visual angle control area, and then realizes narrow visual angle and shows. The viewing angle control electrode is independently controlled from the pixel electrode, so that the light leakage area of the narrow viewing angle bevel edge is increased, the effect of the narrow viewing angle is enhanced, the brightness and the contrast of the wide and narrow viewing angles are consistent, the large peep-proof angle is realized, and the display image quality of the liquid crystal display panel is greatly improved.

Drawings

Fig. 1 is a schematic plan view of a first substrate of a liquid crystal display panel according to a first embodiment of the invention.

Fig. 2 is a schematic cross-sectional view of a liquid crystal display panel in a wide viewing angle mode according to a first embodiment of the invention.

FIG. 3 is a schematic cross-sectional view illustrating a narrow viewing angle mode of a liquid crystal display panel according to a first embodiment of the present invention.

Fig. 4A is a diagram illustrating a simulation effect of transmittance of a conventional liquid crystal display panel in a wide viewing angle display.

Fig. 4B is a diagram illustrating a simulation effect of transmittance of the lcd panel according to the first embodiment of the invention when displaying in a wide viewing angle.

Fig. 5A is a diagram illustrating a simulation effect of transmittance of a conventional liquid crystal display panel in a narrow viewing angle display.

Fig. 5B is a diagram illustrating a simulation effect of transmittance of the lcd panel according to the first embodiment of the invention when displaying at a narrow viewing angle.

Fig. 6 is a schematic plan view of a first substrate of a liquid crystal display panel according to a second embodiment of the invention.

Fig. 7A is a schematic cross-sectional view of a liquid crystal display panel in a wide viewing angle mode according to a second embodiment of the invention.

FIG. 7B is a cross-sectional view of a liquid crystal display panel in a narrow viewing angle mode according to a second embodiment of the present invention.

Fig. 8 is a schematic plan view of a first substrate in a liquid crystal display panel according to a third embodiment of the invention.

Fig. 9 is a schematic plan view of a first substrate of a liquid crystal display panel according to a fourth embodiment of the invention.

Fig. 10 is a schematic cross-sectional view of a liquid crystal display panel according to a fourth embodiment of the invention.

Fig. 11 is a schematic plan view of a first substrate of a liquid crystal display panel according to a fifth embodiment of the invention.

Fig. 12 is a schematic plan view of a first substrate in a liquid crystal display panel according to a sixth embodiment of the invention.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the present invention will be made with reference to the accompanying drawings and examples.

[ first embodiment ]

Fig. 1 is a schematic plan view of afirst substrate 10 of a liquid crystal display panel according to a first embodiment of the invention. Fig. 2 is a schematic cross-sectional view of a liquid crystal display panel in a wide viewing angle mode according to a first embodiment of the invention. FIG. 3 is a schematic cross-sectional view illustrating a narrow viewing angle mode of a liquid crystal display panel according to a first embodiment of the present invention. Referring to fig. 1 to fig. 3, the present embodiment provides a liquidcrystal display panel 100, where the liquidcrystal display panel 100 includes afirst substrate 10 and asecond substrate 20 disposed opposite to each other, and aliquid crystal layer 20 sandwiched between thefirst substrate 10 and thesecond substrate 20. Thelcd panel 100 includes a plurality of pixel units P, each of the pixel units P includes adisplay region 101 and a viewingangle control region 102, and the viewingangle control region 102 has an area at least 1/4 times the area of the pixel unit P.

In this embodiment, thefirst substrate 10 is an array substrate, and thesecond substrate 20 is a color filter substrate.

The viewingangle control area 102 is provided with a viewingangle control electrode 25, and when no voltage is applied to the viewingangle control electrode 25 and no electric field is generated in the viewingangle control area 102, the liquidcrystal display panel 100 displays a wide viewing angle. When the viewingangle control electrode 25 applies the viewing angle control voltage, a vertical electric field is generated in the viewingangle control region 102, and the liquidcrystal display panel 100 displays a narrow viewing angle.

In this embodiment, the viewingangle control region 102 is horizontally disposed with thedisplay region 101, the pixel unit P includes afirst sub-pixel 21, asecond sub-pixel 22, athird sub-pixel 23 and afourth sub-pixel 24, wherein thefirst sub-pixel 21, thesecond sub-pixel 22 and thethird sub-pixel 23 are disposed in thedisplay region 101, and thefourth sub-pixel 24 is disposed in the viewingangle control region 102. Specifically, thefirst sub-pixel 21, thesecond sub-pixel 22, thethird sub-pixel 23, and thefourth sub-pixel 24 are disposed on thesecond substrate 20 and spaced apart from each other by theblack matrix 26. Thefirst sub-pixel 21, thesecond sub-pixel 22, thethird sub-pixel 23 and thefourth sub-pixel 24 are sequentially and horizontally arranged, and thefourth sub-pixel 24 is a white or transparent sub-pixel. Thefirst sub-pixel 21, thesecond sub-pixel 22, thethird sub-pixel 23 and thefourth sub-pixel 24 are all rectangular, and the areas of the four sub-pixels are the same.

Specifically, thefirst sub-pixel 21, thesecond sub-pixel 22, thethird sub-pixel 23, and thefourth sub-pixel 24 are a red sub-pixel R, a green sub-pixel G, a blue sub-pixel B, and a white sub-pixel W, respectively, and the red sub-pixel R, the green sub-pixel G, the blue sub-pixel B, and the white sub-pixel W are arranged side by side to form a pixel unit P.

In this embodiment, as shown in fig. 1, thedisplay region 101 includes afirst pixel electrode 11, asecond pixel electrode 12, and athird pixel electrode 13 disposed on thefirst substrate 10, and thefirst substrate 10 further includes a plurality ofdata lines 111 andscan lines 112, wherein thefirst pixel electrode 11, thesecond pixel electrode 12, and thethird pixel electrode 13 are all connected to thescan lines 112 and thedata lines 111 adjacent to the pixel electrode through a firstthin film transistor 113.

Thefirst substrate 10 further includes acommon electrode 15, thecommon electrode 15 is a full-area electrode and is located below thefirst pixel electrode 11, thesecond pixel electrode 12 and thethird pixel electrode 13, and an insulatinglayer 16 is disposed between thecommon electrode 15 and each pixel electrode (11,12,13) to insulate thecommon electrode 15 and each pixel electrode (11,12, 13).

As shown in fig. 2 and 3, the viewingangle control electrodes 25 are disposed on thesecond substrate 20 and located at a side of thefourth sub-pixel 24 facing theliquid crystal layer 20, the viewingangle control electrodes 25 are strip-shaped electrodes, and all the viewingangle control electrodes 25 are connected together to facilitate applying the viewing angle control voltage signal. The area of thefirst substrate 10 corresponding to the viewingangle control electrode 25 is ablank area 14, that is, the corresponding pixel electrode on thefirst substrate 10 in the viewingangle control area 102 is removed to form theblank area 14, and the design of theblank area 14 can increase the light leakage area of the oblique side of thelcd panel 100 at the narrow viewing angle, so as to enhance the narrow viewing angle effect.

In this embodiment, the liquidcrystal display panel 100 can realize two modes of wide viewing angle and narrow viewing angle display.

In this embodiment, the liquid crystal molecules in theliquid crystal layer 20 are positive liquid crystal molecules. In an initial state (i.e., a state where no voltage is applied to the liquid crystal display panel 100), the positive liquid crystal molecules in theliquid crystal layer 20 are in a lying posture, and the long axis direction of the positive liquid crystal molecules is substantially parallel to the surfaces of the upper and lower substrates.

As shown in fig. 2, in the wide viewing angle mode, gray scale voltages are applied to the pixel electrodes (11,12,13) in thedisplay area 101, and a fringe field is formed between the gray scale voltages and thecommon electrode 15, so that liquid crystal molecules in thedisplay area 101 are subjected to the fringe field, no voltage is applied to the viewingangle control electrode 25 in the viewingangle control area 102, that is, no electric field is generated between thefirst substrate 10 and thesecond substrate 20 in the viewingangle control area 102, and the liquid crystal molecules are not subjected to the field and are in a flat state, so that they are opaque, called a dark state, and thus, wide viewing angle display is achieved in thedisplay area 101.

Fig. 4A is a diagram illustrating a simulation effect of transmittance of a conventional liquid crystal display panel in a wide viewing angle display. Fig. 4B is a diagram illustrating a simulation effect of transmittance of the lcd panel according to the first embodiment of the invention when displaying in a wide viewing angle. As shown in fig. 4A and 4B, the transmittance of the liquid crystal display panel in the prior art in the wide viewing angle display is 3.82%, and the transmittance of the liquidcrystal display panel 100 in the embodiment in the wide viewing angle display reaches 3.34%, i.e., the transmittance of the liquidcrystal display panel 100 in the embodiment in the wide viewing angle display is reduced by 13% compared to the 3.82% in the prior art, and this difference can be reduced by optimally balancing thedisplay area 101 and the viewingangle control area 102 through the pixel design. For example, each pixel of thedisplay region 101 and the viewingangle control region 102 may each occupy one fourth of the entire pixel unit P, and since the viewingangle control region 102 does not need to be controlled by the thin film transistor, the design may be different from the other three sub-pixels, the range of the black matrix of the viewingangle control region 102 may be reduced, and the extra area may be allocated to the other three sub-pixels to compensate for the difference in transmittance in the wide viewing angle mode from the liquid crystal display panel of the related art.

As shown in fig. 3, in the narrow viewing angle mode, thedisplay region 101 still generates a fringe field, the liquid crystal molecules in thedisplay region 101 are subjected to the fringe field, the viewingangle control electrode 25 of the viewingangle control region 102 applies a viewing angle control voltage, such as an ac voltage of 2-4V, the common voltage applied to thecommon electrode 15 on thefirst substrate 10 is 0V, a vertical electric field (e.g., arrow direction) is generated between the viewingangle control electrode 25 and thecommon electrode 15, and the liquid crystal molecules in the viewingangle control region 102 are deflected to a vertical state by the vertical electric field, so that the liquid crystal molecules are in a vertical state and are opaque at a normal viewing angle, and when the screen of the liquidcrystal display panel 100 is viewed from the side, the liquid crystal molecules are in an oblique state to generate lateral light leakage, thereby realizing narrow viewing angle display.

In this embodiment, theblank region 14 is formed by removing the pixel electrode on thefirst substrate 10 at the position corresponding to the viewingangle control region 102, so as to increase the light leakage area of the oblique side of the narrow viewing angle and enhance the narrow viewing angle effect. In the viewingangle control region 102, since no electric field exists between thefirst substrate 10 and thesecond substrate 20 during wide viewing angle display, the liquid crystal molecules remain in the initial state, and the liquidcrystal display panel 100 displays black. When the narrow viewing angle display is carried out, a vertical electric field exists between thefirst substrate 10 and thesecond substrate 20, no electric field exists in the horizontal direction, liquid crystal molecules are only under the action of the vertical electric field, light leakage at the front viewing angle is reduced, and the peep-proof angle at the narrow viewing angle can be effectively improved.

Fig. 5A is a diagram illustrating a simulation effect of transmittance of a conventional liquid crystal display panel in a narrow viewing angle display. Fig. 5B is a diagram illustrating a simulation effect of transmittance of the lcd panel according to the first embodiment of the invention when displaying at a narrow viewing angle. Referring to fig. 5A and 5B, the transmittance of the conventional lcd panel in the narrow viewing angle mode is 2.3%, and the transmittance of thelcd panel 100 of the embodiment in the narrow viewing angle mode reaches 3.34%, which is improved by 45% compared to 2.3% in the prior art. As can be seen from fig. 5A, the dark state light leakage of the prior art is much larger than that of the present embodiment, and the problem of uneven brightness also exists, resulting in low overall contrast. In the liquidcrystal display panel 100 of the embodiment, the viewingangle control area 102 has only a vertical electric field in the narrow viewing angle mode, and there is no electric field in the horizontal direction, so that the arrangement of liquid crystal molecules in the horizontal direction is not affected, the light leakage is very small, and the contrast is greatly improved while the peep-proof angle of the narrow viewing angle is effectively improved.

In the embodiment, when the wide viewing angle mode is switched to the narrow viewing angle mode, the image is displayed with a lower operating voltage, for example, the operating voltage at the wide viewing angle is 0-3.6V, and the operating voltage at the narrow viewing angle mode is reduced to 0-2.8V (Tr =2.9%, CR > 300) or 0-2.5V (Tr =2.49%, CR > 250), so that the transmittance is still higher than the conventional operating voltage of 0-3.6V (Tr =2.3%, CR-150), and the contrast is higher than that of the conventional art.

As shown in fig. 4B and fig. 5B, in the embodiment, in the wide view angle mode, the operating voltage is 3.6V, and the transmittance is 3.34%, and in the narrow view angle mode, the operating voltage is 3.6V, and the transmittance is 3.34%.

The liquidcrystal display panel 100 of the embodiment can also be driven at 60Hz without the problems of flicker and mura, thereby reducing the production cost of the liquidcrystal display panel 100 and avoiding the problem of displaying large-angle gray scale inversion at a narrow viewing angle.

The present embodiment further provides a display device, which includes the liquidcrystal display panel 100 described above.

[ second embodiment ]

Referring to fig. 6 to fig. 7B, the main difference between the liquidcrystal display panel 100 of the present embodiment and the first embodiment is: in this embodiment, the viewingangle control area 102 includes afirst electrode 142 and asecond electrode 27 disposed at an interval, wherein one of thefirst electrode 142 and thesecond electrode 27 is a viewing angle control electrode, thefirst electrode 142 is disposed on thefirst substrate 10, thesecond electrode 27 is disposed on thesecond substrate 20, thefirst electrode 142 and thesecond electrode 27 are disposed up and down correspondingly, and both thefirst electrode 142 and thesecond electrode 27 are strip electrodes.

In the wide viewing angle mode, as shown in fig. 7A, no voltage is applied to thefirst electrode 142 and thesecond electrode 27, that is, no electric field is generated in the viewingangle control region 102, the liquid crystal molecules are kept in a flat lying state, each pixel electrode (11,12,13) in thedisplay region 101 is normally applied with a voltage, and a fringe electric field is generated between the pixel electrode and thecommon electrode 15, so that the wide viewing angle display is realized in thedisplay region 101.

In the narrow viewing angle mode, as shown in fig. 7B, a viewing angle control voltage, such as an ac voltage of 2-4V, is applied to one of thefirst electrode 142 and thesecond electrode 27, and a reference voltage of 0V is applied to the other of thefirst electrode 142 and thesecond electrode 27, so that a vertical electric field is generated between thefirst electrode 142 and thesecond electrode 27, liquid crystal molecules are vertically arranged under the action of the vertical electric field, lateral light leakage is generated in the viewingangle control region 102, thedisplay region 101 still normally displays a picture, and narrow viewing angle display is achieved.

For other structures and operation principles of this embodiment, reference may be made to the first embodiment, which is not described herein again.

[ third embodiment ]

Referring to fig. 8, a difference between thelcd panel 100 according to the third embodiment of the present invention and the second embodiment is that in the present embodiment, thefirst electrode 142 is a viewing angle control electrode, thefirst electrode 142 is a comb-shaped structure, thefirst electrode 142 includes a plurality of comb-tooth portions 144 and a connecting portion 146 vertically connected thereto, and the connecting portion 144 and the comb-tooth portions 146 are disposed in the same layer.

For other structures and operation principles of this embodiment, reference may be made to the first embodiment, which is not described herein again.

[ fourth embodiment ]

Referring to fig. 9 and 10, a liquidcrystal display panel 100 according to a fourth embodiment of the present invention is different from the first embodiment in that in the present embodiment, the viewingangle control area 102 includes afourth pixel electrode 17 and asecond electrode 27 disposed vertically and correspondingly, thefourth pixel electrode 17 is disposed on thefirst substrate 10 and serves as a viewing angle control electrode to control the wide and narrow viewing angle switching, and thesecond electrode 27 is disposed on thesecond substrate 20.

Referring to fig. 10, a firstcommon electrode 18 is disposed below each viewing angle control electrode, the viewingangle control region 102 further includes a viewingangle control line 114 and acommon line 115 disposed on thefirst substrate 10, the viewingangle control line 114 and thecommon line 115 extend in the same direction, and the extending direction of the viewingangle control line 114 is the same as the extending direction of thedata line 111, in this embodiment, thedata line 111 extends in a vertical direction.

Each viewing angle control electrode is connected to thescanning line 112 and the viewingangle control line 114 adjacent to the viewing angle control electrode through a secondthin film transistor 116, and each firstcommon electrode 18 is connected to thescanning line 112 and thecommon line 115 adjacent to the firstcommon electrode 18 through a thirdthin film transistor 117.

Thedisplay region 101 further includes a secondcommon electrode 19 disposed on thefirst substrate 10, and the secondcommon electrodes 19 corresponding to thedisplay region 101 of each pixel unit P are connected to each other in the vertical direction, that is, the secondcommon electrodes 19 of eachdisplay region 101 are connected to form a whole planar electrode in the vertical direction. Specifically, thefirst pixel electrode 11, thesecond pixel electrode 12, and thethird pixel electrode 13 are located above the secondcommon electrode 19, thefirst pixel electrode 11, thesecond pixel electrode 12, thethird pixel electrode 13, and the viewing angle control electrode (fourth pixel electrode) have the same patterning structure, and an insulatinglayer 16 is disposed between each pixel electrode and the viewing angle control electrode and the first and secondcommon electrodes 18 and 19, so as to insulate each pixel electrode (11,12,13) and each common electrode (18, 19) from each other.

In this embodiment, a voltage is applied to the viewing angle control electrode through the viewingangle control line 114, and a common voltage is applied to the firstcommon electrode 18 through thecommon line 115. In each pixel unit P, the viewing angle control electrode and the firstcommon electrode 18 are respectively controlled by the secondthin film transistor 116 and the thirdthin film transistor 117, so as to realize the effect of individually controlling the narrow viewing angle, and the wide and narrow viewing angles are simultaneously stored in the display screen.

Specifically, when we use the display panel, there is often a message or confidential data file to be sent in. The system analyzes the block occupied by the information needing to be kept secret/private, the system gives high voltage to the view angle control electrode of the area needing to be displayed with narrow view angle in the next frame corresponding to the block, and the other places still display with wide view angle, so that wide and narrow view angles are realized and stored in the display screen.

For other structures and operation principles of this embodiment, reference may be made to the first embodiment, which is not described herein again.

[ fifth embodiment ]

Referring to fig. 11, a liquidcrystal display panel 100 according to a fifth embodiment of the present invention is different from the first embodiment in that in the present embodiment, the viewingangle control area 102 and thedisplay area 101 are vertically disposed or vertically disposed in each pixel unit P. The area of the first substrate corresponding to the viewingangle control electrode 25 forms ablank area 14, and theblank area 14 is arranged transversely and is perpendicular to thefirst pixel electrode 11, thesecond pixel electrode 12 and thethird pixel electrode 13.

For other structures and operation principles of this embodiment, reference may be made to the first embodiment, which is not described herein again.

[ sixth embodiment ]

Referring to fig. 12, a difference between the liquidcrystal display panel 100 according to the sixth embodiment of the present invention and the fifth embodiment is that in the present embodiment, afirst electrode 142 is disposed on ablank region 14 of afirst substrate 10, and asecond electrode 27 is disposed on a region of asecond substrate 20 corresponding to thefirst electrode 142, wherein one of thefirst electrode 142 and thesecond electrode 27 is used as a viewing angle control electrode. Wherein thefirst electrode 142 is located above thedisplay region 101 and is vertically arranged with respect to each pixel electrode (11,12,13) in thedisplay region 101, i.e. thefirst electrode 142 is laterally arranged.

For other structures and operation principles of this embodiment, reference may be made to the first embodiment, which is not described herein again.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (4)

1. A liquid crystal display panel (100), the liquid crystal display panel (100) comprising a first substrate (10) and a second substrate (20) disposed opposite to each other, and a liquid crystal layer (30) interposed between the first substrate (10) and the second substrate (20), wherein the liquid crystal display panel (100) comprises a plurality of pixel units P, each pixel unit P comprises a display region (101) and a viewing angle control region (102), the area of the viewing angle control region (102) is at least 1/4 of the area of the pixel unit P, the viewing angle control region (102) is provided with a viewing angle control electrode; when the visual angle control electrode does not apply voltage, the visual angle control area (102) does not generate an electric field, and the liquid crystal display panel (100) displays wide visual angles; when the viewing angle control electrode applies a viewing angle control voltage, the viewing angle control area (102) generates a vertical electric field, and the liquid crystal display panel (100) displays narrow viewing angles;

the pixel unit P comprises a first sub-pixel (21), a second sub-pixel (22), a third sub-pixel (23) and a fourth sub-pixel (24), wherein the first sub-pixel (21), the second sub-pixel (22) and the third sub-pixel (23) are positioned in the display area (101), and the fourth sub-pixel (24) is positioned in the visual angle control area (102);

the viewing angle control area (102) comprises a fourth pixel electrode (17) and a second electrode (27) which are arranged up and down correspondingly, the fourth pixel electrode (17) is arranged on the first substrate (10) and is used as a viewing angle control electrode, the second electrode (27) is arranged on the second substrate (20), a first common electrode (18) is further arranged below each viewing angle control electrode, the viewing angle control area (102) further comprises a viewing angle control line (114) and a common line (115) which are arranged on the first substrate (10), the display area (101) comprises a plurality of scanning lines (112) and a plurality of data lines (111) which are arranged on the first substrate (10), the viewing angle control electrode is connected with the scanning lines (112) and the viewing angle control lines (114) which are close to the viewing angle control electrode through a second thin film transistor (116), and the first common electrode (18) is connected with the scanning lines (112) and the common lines (115) which are close to the first common electrode (18) through a third thin film transistor (117).

2. The lcd panel (100) of claim 1, wherein the display area (101) further comprises a second common electrode (19) disposed on the first substrate (10), and the second common electrodes (19) corresponding to the display area (101) of each pixel unit P are connected to each other in a vertical direction.

3. The lcd panel (100) of claim 2, wherein each of the display regions (101) further comprises a first pixel electrode (11), a second pixel electrode (12) and a third pixel electrode (13) disposed on the first substrate (10), the first pixel electrode (11), the second pixel electrode (12) and the third pixel electrode (13) are all connected to a scan line (112) and a data line (111) adjacent to the pixel electrode through a first thin film transistor (113), the first pixel electrode (11), the second pixel electrode (12) and the third pixel electrode (13) are disposed above the second common electrode (19), the first pixel electrode (11), the second pixel electrode (12), the third pixel electrode (13) and the viewing angle control electrode have the same patterning structure, and the first pixel electrode (11), An insulating layer (16) is arranged between the second pixel electrode (12), the third pixel electrode (13) and the viewing angle control electrode and the first common electrode (18) and the second common electrode (19).

4. A display device, characterized by comprising a liquid crystal display panel (100) according to any one of claims 1 to 3.

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