Disclosure of Invention
1. The invention aims to solve the technical problems that:
The invention provides a dynamic dimming component with a night vision compatible function, which is used for solving the technical problems in the background technology.
2. The technical scheme is as follows:
in order to achieve the above purpose, the technical scheme provided by the invention is that the dynamic dimming component with night vision compatible function comprises
The backlight cavity body plays a role in supporting and fixing the internal structure;
The white light LED component is arranged at the bottom of the backlight cavity and provides a daytime mode illumination backlight source;
The electric rolling shafts are symmetrically arranged and are arranged at the top of the white light LED component, the shielding film and the transparent film are connected to the motorized roller, and the middle parts of the shielding film and the transparent film are spliced together;
The night vision color lamp strip provides a night mode illumination light source, is arranged at the top of the motorized roller and is attached to the side wall of the backlight cavity.
The backlight cavity of the device is arranged in each area at the bottom of the screen to carry out dimming operation, in a daytime mode, the bottom white light LED component carries out illumination operation, the night vision color lamp strip is closed, the shielding film is rolled up under the cooperation of the two electric rollers, the transparent film is unfolded and positioned at the top of the white light LED component, and the bottom white light LED component can penetrate through the transparent film to play a role in illumination;
Under night mode, the transparent film is rolled into the motorized roller, and the shielding film is opened under the cooperation of the two motorized rollers to completely shield the white light LED component at the bottom, and the night vision color lamp strip on the side wall is opened to provide night vision illumination.
The bottom of the night vision color lamp strip is provided with a side wall supporting block, the top of the side wall supporting block is connected with a light guide plate, and the light guide plate and the night vision color lamp strip are on the same horizontal plane.
The top of the light guide plate is provided with a diffusion plate.
The shielding film adopts a diffuse reflection film, the transparent film adopts a prism brightness enhancement film, and the diffuse reflection film and the middle part of the prism brightness enhancement film are spliced to form two ends which are respectively wound around the electric roller.
The light guide plate is made of PMMA material and has a thickness of 1mm-3mm.
And the night vision color lamp strip is welded with an orange green blue color lamp meeting the night vision compatibility requirement, wherein the central wavelength of the orange lamp is less than or equal to 612nm.
The backlight cavity adopts a mechanical structure of metal or plastic, and the surface is subjected to blackening and paint spraying treatment.
3. The beneficial effects are that:
compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
The night vision color lamp has reasonable design and good night vision compatibility, and in the night vision mode, the diffuse reflection film completely shields the bottom white light LED component, so that the light of the night vision color lamp, especially blue light, is prevented from exciting fluorescent powder of the white light LED to generate red stray light of more than 625nm, and the fluorescent powder is ensured to accord with GJB 1394-1992I type A night vision compatibility standard;
In addition, the application has dynamic dimming capability, and in daytime mode, the transparent film (prism brightness enhancement film) is unfolded to allow the bottom white light LED component to normally emit light, support zonal dynamic dimming, improve contrast and reduce power consumption;
In the night mode, the side-in night vision color lamp strip and the light guide plate provide uniform backlight, and meanwhile, the shielding film ensures that the white light LED is completely isolated from the night vision color lamp, and the dynamic backlight partition control can be realized based on the night vision color lamp.
It should be noted that, the structure not described in the present invention does not relate to the design gist and the improvement direction of the present invention, which are the same as the prior art or can be implemented by using the prior art, and the description is omitted herein.
Detailed Description
In order that the invention may be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which, however, the invention may be embodied in many different forms and are not limited to the embodiments described herein, but are instead provided for the purpose of providing a more thorough and complete disclosure of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," "secured," "provided," and "disposed" are to be construed broadly, as they are, for example, fixed, removable, or integral, as they are, for example, mechanically, electrically, directly, indirectly, or through intermediaries, as well as in communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that, since the structure not described in the present invention does not relate to the design gist and the improvement direction of the present invention, the prior art known to those skilled in the art can be adopted.
Specific implementations of the invention are described in detail below in connection with specific embodiments.
Referring to FIGS. 1-4, a dynamic dimming component with night vision compatible functionality includes
The backlight cavity 1 plays a role in supporting and fixing the internal structure;
a white light LED component 2 which is arranged at the bottom of the backlight cavity 1 and provides a daytime mode illumination backlight;
The LED lamp comprises a white light LED component 2, a transparent film 5, a shielding film 4 and a motor-driven roller 3 which are symmetrically arranged, wherein the motor-driven roller 3 is arranged at the top of the white light LED component 2, the shielding film 4 and the transparent film 5 are connected to the motor-driven roller 3, and the middle parts of the shielding film 4 and the transparent film 5 are spliced together;
A night vision color lamp strip 6 for providing night vision illumination backlight, which is arranged on the top of the motorized roller 3 and is attached to the side wall of the backlight cavity 1.
The backlight cavity 1 of the device is arranged in each area at the bottom of a screen to perform dimming operation, wherein the white light LED component 2 has a dynamic dimming function, in a daytime mode, the white light LED component 2 at the bottom performs illumination operation, the night vision color lamp strip 6 is closed, the shielding film 4 is rolled up under the cooperation of the two motorized rollers 3, the transparent film 5 is unfolded and positioned at the top of the white light LED component 2, and the white light LED component 2 at the bottom can penetrate through the transparent film 5 to perform illumination;
Under night mode, transparent film 5 is rolled into motorized roller 3 at this moment, and shielding film 4 is opened under the cooperation of two motorized roller 3, shields bottom white light LED subassembly 2 completely, and the night vision color lamp strip 6 of lateral wall is opened and is provided night vision illumination, because shielding effect of shielding film 4, blue light ray in the night vision color lamp strip 6 keeps apart with white light LED subassembly 2, avoids blue light to arouse the problem that the phosphor powder on the white light LED subassembly 2 produced red light, has realized better night vision compatible function promptly.
The bottom of the night vision color lamp strip 6 is provided with a side wall supporting block 7, the top of the side wall supporting block 7 is connected with a light guide plate 71, the light guide plate 71 and the night vision color lamp strip 6 are on the same horizontal plane, the night vision color lamps are closely arranged on the lamp strip and are diffused into a uniform surface light source through the light guide plate 71, and the night vision color lamp strip 6 is arranged between the white light LED lamp plate and the liquid crystal screen in a side backlight mode, so that the night vision illumination effect is improved.
The top of the light guide plate 71 is provided with a diffusion plate 8, and the diffusion plate 8 is arranged at the uppermost part of the backlight cavity 1, thereby having the function of improving the uniformity of backlight.
The shielding film 4 adopts a diffuse reflection film, the transparent film 5 adopts a prism brightness enhancement film, the diffuse reflection film and the two ends spliced in the middle of the prism brightness enhancement film are respectively wound on the electric rolling shafts 3, under the action of the two symmetrically arranged electric rolling shafts 3, the diffuse reflection film and the prism can cover and transmit the white light LED assembly 2 at the bottom, in the daytime mode, the electric rolling shafts 3 at the diffuse reflection film end are inwards rolled, the electric rolling shafts 3 at the prism brightness enhancement film end are outwards rolled until the prism brightness enhancement film plays a role of transmitting the white light LED assembly 2 at the bottom, the prism brightness enhancement film surface is provided with a micro-prism structure, scattered light emitted by the white light LED assembly 2 can be redirected, and is concentrated in a viewing angle range right in front of a screen, so that light is prevented from being absorbed or wasted, and the front brightness is improved.
The light guide plate 71 is made of PMMA, the thickness is 1mm-3mm, in this embodiment, the light guide plate 71 is made of transparent material, the bottom surface has light guide dots, the effect on the light incident from the bottom surface can be equivalent to a low-haze diffusion film, the night vision color lamp strip 6 is diffused into a uniform surface light source through the light guide plate 71, the light guide plate 71 is made of PMMA, the light transmittance of the light guide plate is as high as 92% and is better than 80% -90% of that of common glass, the light transmittance is close to the definition of optical glass, the density is 1.18 g/cm3, the light guide plate is only half of that of glass, but the impact resistance is higher, and it is required to be noted that the light guide plate 71 can also be made of other light guide materials, such as a glass plate.
The night vision color lamp strip 6 is welded with an orange-green-blue color lamp meeting the requirement of night vision compatibility, wherein the central wavelength of the orange lamp is less than or equal to 612nm, and in the application of the requirement of night vision compatibility, such as military, aviation or low-light environment equipment, the color lamps on the lamp strip, such as orange, green and blue, are required to meet strict spectral radiation and brightness parameters so as to ensure compatibility with a night vision device, such as a third generation/fourth generation image intensifier.
The backlight cavity 1 adopts a mechanical structure of metal or plastic, the surface is subjected to blackening and paint spraying treatment, the metal cavity has the advantages of impact resistance and deformation resistance, and is suitable for large-size or high-load application, the metal has high heat conductivity, the heat dissipation of an LED backlight source can be helped, the service life is prolonged, the plastic cavity is low in density and the weight of the whole structure, scattered light can be absorbed by the surface subjected to blackening and paint spraying treatment, the backlight light leakage or halation effect is avoided, and the contrast is improved.
The above examples illustrate only certain embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention, it being understood that variations and modifications can be made by those skilled in the art without departing from the spirit of the invention, which is within the scope of the invention, and the appended claims shall therefore be construed as defining the scope of the invention.