Image display device
By adopting the combination of light source mode, light conversion mode, monochrome light modulator and controller in the image display device, the existing three-piece LCD display system is solved, and a high brightness display effect with a smaller size and lower cost is achieved.
Patent Information
- Application Number
- CN202421372292.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-06-14
AI Technical Summary
The existing three-piece LCD display system is large in size and has high cost.
An image display device is adopted, which includes a light source module, an optical conversion module, a monochromatic optical modulator and a controller. The light source mode includes a plurality of light emitting units, and the light conversion mode converts multiple first designated light into multiple second designated light rays, and each second designated light is composed of at least two monochromatic lights mixed in a preset timing. The monochromatic light modulator generates a display image by modulating these monochromatic lights, and the controller adjusts the input current value of the light emitting unit to control the display brightness.
The overall volume and hardware cost of the image display device are reduced, the display brightness of the displayed image is significantly improved, the display effect is ensured, and the dynamic contrast and dynamic picture display effect are improved.
Smart Images
Figure CN222600003U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of optical imaging technology, and more specifically, to an image display device. Background Art
[0002] For the three-chip liquid crystal display system, it mainly irradiates the three colors of light, R, G, and B, onto three liquid crystal display panels (Liquid Crystal Display, LCD) respectively, and controls the timing proportion of the three colors of light, R, G, and B, respectively, to present the display image required by the system.
[0003] However, the existing three-chip liquid crystal display system has the problems of large size and high cost. Utility Model Content
[0004] An embodiment of the present application provides an image display device, which includes a light source module, a light conversion module, a monochromatic light modulator and a controller. The light source module includes a plurality of light emitting units, each of which is used to generate a first designated light. The light conversion module is arranged on a light path where the multiple first designated lights are located, and is used to convert the multiple first designated lights into multiple second designated lights; wherein each second designated light is formed by mixing at least two monochromatic lights in a preset timing. The monochromatic light modulator includes a plurality of modulation areas, and the plurality of modulation areas are arranged one by one on the light path where the multiple second designated lights are located, and each modulation area is used to modulate the corresponding second designated light to generate a corresponding display image. The controller is electrically connected to the light source module, and is used to adjust the input current values corresponding to the plurality of light emitting units.
[0005] Among them, in some possible embodiments, the optical conversion module includes an optical conversion element, which is arranged on the optical path where the multiple first designated light rays are located, and is used to convert each first designated light ray into a designated red light, a designated green light, and a designated blue light in a preset timing; the designated red light, the designated green light, and the designated blue light are mixed to form a second designated light ray. The controller is used to adjust at least one of the first input current value, the second input current value, and the third input current value corresponding to the multiple light-emitting units to adjust the proportion of at least one of the designated red light, the designated green light, and the designated blue light in the second designated light; the first input current value is the input current value of the light-emitting unit when the optical conversion element generates the designated red light; the second input current value is the input current value of the light-emitting unit when the optical conversion element generates the designated blue light; the third input current value is the input current value of the light-emitting unit when the optical conversion element generates the designated green light.
[0006] Among them, in some possible embodiments, the first designated light is blue light; the light conversion component includes a color wheel, the color wheel includes a first fluorescent portion, a second fluorescent portion and a transmission portion connected to each other; the first fluorescent portion is used to generate a designated red light under the excitation of the first designated light; the second fluorescent portion is used to generate a designated green light under the excitation of the first designated light; the transmission portion is used to transmit the first designated light to generate a designated blue light.
[0007] Among them, in some possible embodiments, the light-emitting unit includes a light-emitting chip and a yellow fluorescent component, the light-emitting chip is used to generate a first excitation light, the first excitation light is blue light; the yellow fluorescent component covers the light-emitting surface of the light-emitting chip, and the yellow fluorescent component generates yellow fluorescence under the excitation of a part of the first excitation light; another part of the first excitation light is transmitted through the yellow fluorescent component to form a second excitation light, and the second excitation light is mixed with the yellow fluorescence to form the first designated light.
[0008] Among them, in some possible embodiments, the light conversion element includes a color filter wheel, the color filter wheel includes a first color filter portion, a second color filter portion and a third color filter portion that are connected to each other; the first color filter portion is used to filter the first designated light to produce a designated red light; the second color filter portion is used to filter the first designated light to produce a designated green light; the third color filter portion is used to filter the first designated light to produce a designated blue light.
[0009] Among them, in some possible embodiments, the light conversion module also includes a first lens assembly, which is arranged between the light conversion element and the monochromatic light modulator and is located on the optical path where the multiple second designated light rays are located; the first lens assembly is used to image the light emitting surfaces of multiple light emitting units respectively and then incident on multiple modulation areas; or, the first lens assembly is used to image the light emitting surfaces of the light conversion element and then incident on multiple modulation areas.
[0010] Among them, in some possible embodiments, the light conversion module also includes a first lens assembly and a second lens assembly, the second lens assembly is arranged between the light source module and the light conversion component, and is located on the optical path where the multiple first designated light rays are located, and is used to converge the light emitting surfaces of the multiple light emitting units and then make them incident on the light conversion component; the first lens assembly is arranged between the light conversion component and the monochromatic light modulator, and is located on the optical path where the multiple second designated light rays are located, and is used to image the light emitting surfaces of the light conversion component and then make them incident on multiple modulation areas.
[0011] In some possible embodiments, the monochromatic light modulator includes a monochromatic liquid crystal display.
[0012] In some possible embodiments, the light source module includes a plurality of light-emitting chips and a substrate, and the plurality of light-emitting chips are arranged on the substrate in an M*N array; wherein M is the number of the light-emitting chips in the first direction, and N is the number of the light-emitting chips in the second direction, and the second direction intersects with the first direction.
[0013] In some possible embodiments, the monochromatic light modulator includes an effective display area and an invalid display area, the effective display area includes a plurality of modulation areas, and the invalid display area is arranged around the periphery of the effective display area; the length of the effective display area in the first direction is H, the length of the effective display area in the second direction is V, the minimum spacing between the outer contour of the invalid display area and the outer contour of the effective display area in the first direction is h, and the minimum spacing between the outer contour of the invalid display area and the outer contour of the effective display area in the second direction is v; the spacing between two adjacent light-emitting chips in the first direction is m, and the spacing between two adjacent light-emitting chips in the second direction is n; the length a of each light-emitting chip in the first direction satisfies the following formula: a<(((H+2h)*sin(θ)*k / sin(γ)) / M)―(m*(M―1)); the length b of each light-emitting chip in the second direction satisfies the following formula: b<(((V+2 v )*sin(θ)*k / sin(γ)) / N)―(n*(N―1)); where θ is the light cone angle at the monochromatic light modulator; k is the lens transmittance; and γ is the Lambertian light collection angle.
[0014] The embodiment of the present application provides an image display device, which may include a light source module, a light conversion module, a monochromatic light modulator and a controller. The light source module includes a plurality of light emitting units, each of which is used to generate a first designated light. The light conversion module is arranged on the light path where the multiple first designated lights are located, and is used to convert the multiple first designated lights into multiple second designated lights. Each second designated light is formed by mixing at least two monochromatic lights in a preset time sequence. For example, each second designated light can be formed by mixing green light, red light and blue light in a preset time sequence.
[0015] The monochromatic light modulator includes a plurality of modulation areas, and the plurality of modulation areas are arranged one by one on the optical path where the plurality of second designated light rays are located, and each modulation area is used to modulate the corresponding second designated light rays to generate a corresponding display image. That is to say, each modulation area in the present application corresponds to a light emitting unit, and the modulation area is used to sequentially perform time-sharing modulation on at least two monochromatic lights in the second designated light rays, for example, the modulation area is used to sequentially perform time-sharing cyclic modulation on green light, red light and blue light to generate a corresponding display image.
[0016] Therefore, the light modulator in this embodiment adopts a monochromatic light modulator, and the display image is generated by emitting light in the three colors of R, G, and B in a time sequence, that is, there is no need to set the three color filters of R, G, and B on the light modulator. On the one hand, the overall volume and hardware cost of the image display device can be reduced; on the other hand, due to the elimination of the color filter, the display brightness of the displayed image can be significantly improved compared with the light modulator in the three-chip liquid crystal display system, so as to ensure the display effect of the image display device.
[0017] Furthermore, the controller is electrically connected to the light source module, and is used to adjust the input current values corresponding to the multiple light-emitting units. Since the multiple light-emitting units and the multiple modulation areas are in one-to-one correspondence, the controller adjusts the input current values corresponding to the multiple light-emitting units to achieve independent control of the display brightness of different modulation areas. For example, when the display image generated by a certain modulation area requires a higher display brightness, the controller can increase the input current value of the light-emitting unit corresponding to the modulation area; conversely, when the display image generated by a certain modulation area requires a lower display brightness, the controller can reduce the input current value of the light-emitting unit corresponding to the modulation area.
[0018] Therefore, the controller in this embodiment can dynamically adjust the input current values corresponding to different light-emitting units according to the display brightness of the display image to be generated. On the one hand, the power loss of the light source module can be reduced; on the other hand, the dynamic contrast and dynamic picture display effect of the overall display image generated by the image display device can be improved to improve the user's viewing experience. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0020] Figure 1 It is a schematic diagram of the structure of the image display device provided in an embodiment of the present application.
[0021] Figure 2 yes Figure 1 The schematic diagram of the structure of the monochromatic light modulator in the image display device is shown.
[0022] Figure 3 yes Figure 1 A structural schematic diagram of a light source module in the image display device shown.
[0023] Figure 4 This is another structural schematic diagram of the image display device provided in an embodiment of the present application.
[0024] Figure 5 yes Figure 1 A schematic structural diagram of a color wheel in an image display device is shown.
[0025] Figure 6 yes Figure 4 The structure schematic diagram of the color filter wheel in the image display device is shown.
[0026] Figure 7 This is another structural schematic diagram of the image display device provided in an embodiment of the present application. DETAILED DESCRIPTION
[0027] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.
[0028] The present application provides an image display device 100. The image display device 100 is a device that modulates light to generate a color display image. Specifically, the image display device 100 may be a liquid crystal display. Figure 1 and Figure 2 The image display device 100 may include a light source module 10, a light conversion module 30, a monochromatic light modulator 50 and a controller 70. The light source module 10 includes a plurality of light emitting units 120, each of which is used to generate a first designated light L1.
[0029] The light conversion module 30 is disposed on the optical path where the multiple first designated light beams L1 are located, and is used to convert the multiple first designated light beams L1 into multiple second designated light beams L2. Each second designated light beam L2 is formed by mixing at least two monochromatic lights in a preset time sequence. For example, each second designated light beam L2 can be formed by mixing green light, red light and blue light in a preset time sequence.
[0030] The monochromatic light modulator 50 may include a plurality of modulation areas 520, which are arranged one by one on the optical path where the plurality of second designated light beams L2 are located, and each modulation area 520 is used to modulate the corresponding second designated light beam L2 to generate a corresponding display image. That is, each modulation area 520 in the present embodiment corresponds to a light emitting unit 120, and each modulation area 520 is used to sequentially perform time-sharing modulation on at least two monochromatic lights in the second designated light beam L2, for example, the modulation area 520 is used to sequentially perform time-sharing cyclic modulation on green light, red light and blue light to generate a corresponding display image.
[0031] Therefore, the light modulator in this embodiment adopts a monochromatic light modulator 50, and the display image is generated by emitting light in the three colors of R, G, and B in a time sequence, that is, the light modulator does not need to be provided with three color filters of R, G, and B. On the one hand, the overall volume and hardware cost of the image display device 100 can be reduced; on the other hand, due to the elimination of the color filter, the display brightness of the displayed image can be significantly improved compared with the light modulator in the three-chip liquid crystal display system, so as to ensure the display effect of the image display device 100.
[0032] The controller 70 is electrically connected to the light source module 10, and is used to adjust the input current values corresponding to the multiple light-emitting units 120. Since the multiple light-emitting units 120 and the multiple modulation areas 520 are in one-to-one correspondence, the controller 70 adjusts the input current values corresponding to the multiple light-emitting units 120 to achieve independent control of the display brightness of different modulation areas 520. For example, when the display image generated by a certain modulation area 520 requires a higher display brightness, the controller 70 can increase the input current value of the light-emitting unit 120 corresponding to the modulation area 520; conversely, when the display image generated by a certain modulation area 520 requires a lower display brightness, the controller 70 can reduce the input current value of the light-emitting unit 120 corresponding to the modulation area 520.
[0033] Therefore, the controller 70 in this embodiment can dynamically adjust the input current values corresponding to different light-emitting units 120 according to the display brightness of the display image to be generated. On the one hand, the power loss of the light source module 10 can be reduced; on the other hand, the dynamic contrast and dynamic picture display effect of the overall display image generated by the image display device 100 can be improved to improve the user's viewing experience.
[0034] The specific structure of the image display device 100 is introduced below.
[0035] In this embodiment, the light source module 10 is used to generate multiple first designated light beams L1. Figure 3 The light source module 10 may include a substrate 140 and a plurality of light emitting units 120, and the plurality of light emitting units 120 are disposed on the substrate 140. Each of the light emitting units 120 is used to generate a first designated light L1.
[0036] In some possible embodiments, Figure 1As shown, the first designated light L1 is blue light, and the light-emitting unit 120 may be a light-emitting chip 1210, for example, a blue light LED chip. The multiple light-emitting chips 1210 corresponding to the multiple light-emitting units 120 are arranged in an M*N array on the substrate 140. Among them, M is the number of light-emitting chips 1210 in the first direction X, and N is the number of light-emitting chips 1210 in the second direction Y, and the second direction Y intersects with the first direction X. Specifically, the second direction Y can be perpendicular to the first direction X, and the plane defined by the two is the light-emitting surface of the light source module 10. Figure 3 In the embodiment shown, M is equal to 5 and N is equal to 4.
[0037] In some other possible embodiments, see Figure 4 , the first designated light L1 is white light, then the light-emitting unit 120 may include a light-emitting chip 1210 and a yellow fluorescent member 1230, wherein the light-emitting chip 1210 is used to generate a first excitation light (not shown in the figure), and the first excitation light may be blue light. For example, the light-emitting chip 1210 may be a blue light LED chip. Specifically, the plurality of light-emitting chips 1210 corresponding to the plurality of light-emitting units 120 are arranged on the substrate 140 in an M*N array.
[0038] The yellow fluorescent element 1230 covers the light emitting surface of the light emitting chip 1210 (not shown in the figure). The yellow fluorescent element 1230 generates yellow fluorescence (not shown in the figure) under the excitation of a part of the first excitation light; another part of the first excitation light transmits the yellow fluorescent element 1230 to form a second excitation light (not shown in the figure), and the second excitation light is mixed with the yellow fluorescence to form the first designated light L1. Since the "second excitation light" here is part of the light in the first excitation light, the second excitation light is also blue light. In other words, the first designated light L1 in this embodiment is white light mixed with blue light and yellow fluorescence.
[0039] As an implementation, the yellow fluorescent component 1230 may be a yellow fluorescent ceramic sheet, which may be attached to the light-emitting surface of the light-emitting chip 1210. Specifically, the multiple yellow fluorescent ceramic sheets corresponding to the multiple light-emitting units 120 may be an integrally formed structure to reduce the processing difficulty of the light source module 10. As another implementation, the yellow fluorescent component 1230 may be a yellow fluorescent glue layer, which may be made by doping a large amount of yellow fluorescent particles in a viscous colloid. The yellow fluorescent glue layer may be coated on the light-emitting surface of the light-emitting chip 1210 to improve the fixing reliability of the yellow fluorescent component 1230.
[0040] In the present embodiment, the optical conversion module 30 is arranged on the optical path where the multiple first designated light beams L1 are located, and is used to convert the multiple first designated light beams L1 into multiple second designated light beams L2. Specifically, the optical conversion module 30 may include an optical conversion component 320, which is arranged on the optical path where the multiple first designated light beams L1 are located, and is used to convert each first designated light beam L1 into a designated red light, a designated green light, and a designated blue light at a preset timing. The designated red light, the designated green light, and the designated blue light are mixed to form the second designated light beam L2. In other words, the designated red light, the designated green light, and the designated blue light in each second designated light beam L2 will be incident on the corresponding modulation area 520 in a cycle in sequence at a preset timing.
[0041] Please refer to Figure 1 and Figure 5 , when the first designated light L1 is blue light, the light conversion element 320 may include a color wheel 3210. The color wheel 3210 may include a first fluorescent portion 3212, a second fluorescent portion 3214, and a transmission portion 3216 connected to each other. Specifically, the first fluorescent portion 3212, the second fluorescent portion 3214, and the transmission portion 3216 may be sequentially connected and surround the periphery of the color wheel center M. When the color wheel 3210 rotates and works, the first fluorescent portion 3212, the second fluorescent portion 3214, and the transmission portion 3216 are sequentially and alternately located on the optical path where the multiple first designated light L1 are located.
[0042] When the first fluorescent part 3212 rotates to the optical path where the multiple first designated light beams L1 are located, the first fluorescent part 3212 is used to generate designated red light under the excitation of the first designated light beams L1. At this time, the multiple designated red lights generated by the first fluorescent part 3212 will be incident on the multiple modulation areas 520 one by one. Specifically, the first fluorescent part 3212 can be a red fluorescent ceramic sheet, or a red fluorescent glue layer is applied to the corresponding area of the color wheel 3210.
[0043] When the second fluorescent part 3214 rotates to the optical path where the multiple first designated light beams L1 are located, the second fluorescent part 3214 is used to generate designated green light under the excitation of the first designated light beams L1. At this time, the multiple designated green lights generated by the second fluorescent part 3214 will be incident on the multiple modulation areas 520 one by one. Specifically, the first fluorescent part 3212 can be a green fluorescent ceramic sheet, or a green fluorescent glue layer is applied to the corresponding area of the color wheel 3210.
[0044] When the transmission part 3216 rotates to the optical path where the multiple first designated light beams L1 are located, the transmission part 3216 is used to transmit the first designated light beams L1 to generate designated blue light. At this time, the multiple designated blue light beams emitted by the transmission part 3216 will be incident on multiple modulation areas 520 one by one. Specifically, the transmission part 3216 can be made of a transparent material (e.g., glass, transparent plastic).
[0045] Please refer to Figure 4 and Figure 6 , when the first designated light L1 is white light, the light conversion element 320 may include a color filter wheel 3230. The color filter wheel 3230 may include a first color filter portion 3232, a second color filter portion 3234, and a third color filter portion 3236 connected to each other. Specifically, the first color filter portion 3232, the second color filter portion 3234, and the third color filter portion 3236 may be sequentially connected and surround the periphery of the color filter wheel center N. When the color filter wheel 3230 rotates and works, the first color filter portion 3232, the second color filter portion 3234, and the third color filter portion 3236 will be located in turn in the optical path where the multiple first designated light L1 is located.
[0046] When the first color filter 3232 rotates to the optical path where the multiple first designated light L1 is located, the first color filter 3232 is used to filter the first designated light L1 to generate designated red light. At this time, the multiple designated red lights generated by the first color filter 3232 will be incident on the multiple modulation areas 520 one by one. Specifically, the first color filter 3232 can be a red light filter, which is used to transmit the red light component in the first designated light L1 (that is, white light) to generate the designated red light.
[0047] When the second color filter 3234 rotates to the optical path where the multiple first designated light L1 is located, the second color filter 3234 is used to filter the first designated light L1 to generate designated green light. At this time, the multiple designated green lights generated by the second color filter 3234 will be incident on the multiple modulation areas 520 one by one. Specifically, the second color filter 3234 can be a green light filter, which is used to transmit the green light component in the first designated light L1 (that is, white light) to generate designated green light.
[0048] When the third color filter 3236 rotates to the optical path where the multiple first designated light L1 is located, the third color filter 3236 is used to filter the first designated light L1 to generate designated blue light. At this time, the multiple designated blue lights generated by the third color filter 3236 will be incident on multiple modulation areas 520 one by one. Specifically, the third color filter 3236 can be a blue light filter, which is used to transmit the blue light component in the first designated light L1 (that is, white light) to generate designated blue light.
[0049] Please refer to Figure 1 and Figure 4 In some possible embodiments, the light conversion module 30 may further include a first lens assembly 340, which is disposed between the light conversion element 320 and the monochromatic light modulator 50 and is located on the optical path where the multiple second designated light beams L2 are located.
[0050] In some possible examples, the first lens assembly 340 is used to image the light-emitting surface of the light conversion element 320 and then incident on multiple modulation areas 520. The "light-emitting surface of the light conversion element 320" here can be understood as the side of the light conversion element 320 used to emit multiple second designated light rays L2. Therefore, each second designated light ray L2 in this embodiment can be accurately incident on the corresponding position (that is, the corresponding modulation area 520) on the monochromatic light modulator 50 after being imaged by the first lens assembly 340, so that the subsequent monochromatic light modulator 50 can smoothly generate the display image. Therefore, through the design of the imaging effect of the first lens assembly 340, it is possible to achieve zoned lighting without setting multiple cone rods between the light conversion module 30 and the monochromatic light modulator 50, thereby reducing the hardware cost of the image display device 100.
[0051] In some other possible examples, the first lens assembly 340 is used to image the light-emitting surfaces of the multiple light-emitting units 120 respectively and then inject them into the multiple modulation areas 520. The "light-emitting surface of the light-emitting unit 120" here can be understood as the side of the light-emitting unit 120 used to emit the first designated light L1. Since the multiple light-emitting units 120 in the light source module 10 are arranged at intervals, there will be a certain gap between the multiple second designated light rays L2. Therefore, when the first lens assembly 340 images the light-emitting surfaces of the multiple light-emitting units 120 respectively, since the light emitted by the light conversion element 320 (that is, the second designated light ray L2) is defocused, the first lens assembly 340 can also have a uniform light effect on the multiple second designated light rays L2, so as to eliminate the gaps between the multiple second designated light rays L2, thereby improving the overall imaging quality of the monochromatic light modulator 50.
[0052] In addition, the first lens assembly 340 also has the function of converging and collecting the multiple second designated light beams L2 to ensure the energy utilization efficiency of the multiple second designated light beams L2. Specifically, the first lens assembly 340 may include one or more converging lenses. Figure 1 and Figure 4 In the embodiment shown, the number of the converging lenses is two. Researchers can adjust the number and optical parameters of the converging lenses according to the specific imaging position of the first lens assembly 340, and this embodiment does not impose any specific restrictions.
[0053] See also Figure 7In some possible embodiments, the light conversion module 30 may further include a first lens assembly 340 and a second lens assembly 360. The second lens assembly 360 is disposed between the light source module 10 and the light conversion component 320 and is located on the optical path where the multiple first designated light rays L1 are located. The second lens assembly 360 is used to image the light emitting surfaces of the multiple light emitting units 120 and then incident on the light conversion component 320. It is not difficult to find that the second lens assembly 360 in this embodiment can also converge and collect the multiple first designated light rays L1, and can reduce the size of the light spot on the multiple first designated light rays L1 incident on the light conversion component 320, thereby reducing the overall size of the light conversion component 320, so as to reduce the hardware cost of the image display device 100. Specifically, the second lens assembly 360 may include one or more converging lenses. Figure 7 In the illustrated embodiment, the number of converging lenses is two.
[0054] The first lens assembly 340 is disposed between the light conversion element 320 and the monochromatic light modulator 50 and is located on the optical path of the multiple second designated light beams L2. It is used to image the light emitting surface of the light conversion element 320 and then incident on the multiple modulation areas 520. Figure 7 In the illustrated embodiment, the light generated by the light source module 10 is imaged twice before being incident on the monochromatic light modulator 50 .
[0055] In this embodiment, the monochromatic light modulator 50 is used to modulate the multiple second designated light beams L2 to generate an overall display image. The display image generated by each modulation area 520 can be understood as a partial image in the overall display image. Specifically, the monochromatic light modulator 50 includes a monochromatic liquid crystal display screen, that is, a monochromatic LCD screen.
[0056] In this embodiment, the monochromatic light modulator 50 may include an effective display area 540 and an invalid display area 560. The invalid display area 560 is arranged around the periphery of the effective display area 540, and together with the effective display area 540, forms the entire working area of the monochromatic light modulator 50. Taking the monochromatic light modulator 50 as a monochrome LCD screen as an example, the effective display area 540 may be a liquid crystal area for image display in the monochrome LCD screen, and the invalid display area 560 may be a liquid crystal area for no image display in the monochrome LCD screen. Specifically, the effective display area 540 may include a plurality of modulation areas 520, wherein the plurality of modulation areas 520 here correspond to the plurality of light-emitting chips 1210 one by one. When the plurality of light-emitting chips 1210 are arranged in an M*N array, the plurality of modulation areas 520 are also arranged in an M*N array. It is not difficult to understand here that each modulation area 520 is a partial area in the effective display area 540, and in the actual monochromatic light modulator 50, there is no dividing line between two adjacent modulation areas 520.
[0057] For details, please refer again to Figure 2 and Figure 3 , the length of the effective display area 540 in the first direction X is H, the length of the effective display area 540 in the second direction Y is V, the minimum distance between the outer contour of the invalid display area 560 and the outer contour of the effective display area 540 in the first direction X is h, and the minimum distance between the outer contour of the invalid display area 560 and the outer contour of the effective display area 540 in the second direction Y is v. The distance between two adjacent light-emitting chips 1210 in the first direction X is m, and the distance between two adjacent light-emitting chips 1210 in the second direction Y is n. Then the length a of each light-emitting chip 1210 in the first direction X satisfies the following formula:
[0058] a<(((H+2h)*sin(θ)*k / sin(γ)) / M)―(m*(M―1));
[0059] The length b of each light emitting chip 1210 in the second direction Y satisfies the following formula:
[0060] b<(((V+2 v )*sin(θ)*k / sin(γ)) / N)―(n*(N―1));
[0061] Wherein, θ is the light cone angle at the monochromatic light modulator 50; k is the lens transmittance; and γ is the Lambertian light collection angle.
[0062] Here, taking the case where the light cone angle is 7.5 degrees, the lens transmittance is 0.8, and the Lambertian light receiving angle is 75 degrees, and the monochromatic light modulator 50 is a 5.5-inch LCD screen, H is equal to 122.122 cm, V is equal to 68.688 cm, h is equal to 2 cm, and v is equal to 2 cm. If M is equal to 6, N is equal to 4, m is equal to 0.2 cm, and n is equal to 0.2 cm, then the length a of each light emitting chip 1210 needs to be less than 126.122*sin(7.5°)*0.8 / sin(75°) / 6-0.2=2.0 cm; the length b of each light emitting chip 1210 needs to be less than 72.688*sin(7.5°)*0.8 / sin(75°) / 4-0.2=1.76 cm.
[0063] Therefore, the above formula reflects the maximum size that each light-emitting chip 1210 can reach when the spacing m and the spacing n are fixed values, so that the monochromatic light modulator 50 can achieve the maximum light-emitting area within the limited layout space under normal operation, thereby improving the image display brightness of the monochromatic light modulator 50.
[0064] In this embodiment, the controller 70 is electrically connected to the light conversion element 320 and the plurality of light emitting units 120, respectively. On one hand, the controller 70 is used to control the rotation of the light conversion element 320 so that the designated red light, designated green light, and designated blue light emitted by the light conversion element 320 are sequentially incident on the monochromatic light modulator 50 in a cycle at a preset timing. On the other hand, the controller 70 is also used to adjust the input current values corresponding to the plurality of light emitting units 120. Since the plurality of light emitting units 120 and the plurality of modulation areas 520 are in one-to-one correspondence, the controller 70 adjusts the input current values corresponding to the plurality of light emitting units 120 to achieve independent control of the display brightness of different modulation areas 520.
[0065] For example, when a display image generated by a certain modulation area 520 requires a higher display brightness, the controller 70 can increase the input current value of the light-emitting unit 120 corresponding to the modulation area 520; conversely, when a display image generated by a certain modulation area 520 requires a lower display brightness, the controller 70 can reduce the input current value of the light-emitting unit 120 corresponding to the modulation area 520. As an embodiment, the controller 70 can store a configuration file of the overall display image to be displayed, and the display brightness of the display image corresponding to different modulation areas 520 can be determined based on the configuration file. Specifically, the controller 70 can be a control chip, a control circuit integrated with a control chip, and the like.
[0066] In some possible embodiments, the controller 70 is further used to adjust at least one of the first input current value, the second input current value, and the third input current value corresponding to the plurality of light-emitting units 120. The first input current value is the input current value of the light-emitting unit 120 when the light-converting element 320 generates the specified red light; the second input current value is the input current value of the light-emitting unit 120 when the light-converting element 320 generates the specified blue light; and the third input current value is the input current value of the light-emitting unit 120 when the light-converting element 320 generates the specified green light. In this embodiment, by adjusting at least one of the first input current value, the second input current value, and the third input current value, the proportion of at least one of the specified red light, the specified green light, and the specified blue light in the second specified light L2 can be adjusted to adjust the image white balance of the display image generated by the modulation area, and realize independent control of the display white balance of different modulation areas 520.
[0067] For example, when the display image generated by a certain modulation area 520 requires a display white balance with a higher color temperature, it means that the hue of the display image is cyan, for example, the corresponding color coordinates may be (0.29, 0.31). In this case, the controller 70 may use the first input current value and the second input current value of the light emitting unit 120 corresponding to the modulation area 520. Specifically, the controller 70 may increase the second input current value and reduce the first input current value to increase the proportion of the designated blue light in the second designated light L2 and reduce the proportion of the designated red light in the second designated light L2. For another example, when the display image generated by a certain modulation area 520 requires a display white balance with a lower color temperature, it means that the hue of the display image is reddish, for example, the corresponding color coordinates may be (0.31, 0.33). In this case, the controller 70 may use the first input current value and the second input current value of the light emitting unit 120 corresponding to the modulation area 520. Specifically, the controller 70 may reduce the second input current value and increase the first input current value to increase the proportion of the designated red light in the second designated light L2 and reduce the proportion of the designated blue light in the second designated light L2. As an implementation manner, the controller 70 may store a configuration file of the overall display image to be displayed, and the display white balance of the display image corresponding to different modulation areas 520 may be determined based on the configuration file.
[0068] Therefore, the controller 70 in this embodiment can dynamically adjust the input current values corresponding to different light-emitting units 120 according to the display white balance of the display image to be generated, which can improve the dynamic white balance and dynamic picture display effect of the overall display image generated by the image display device 100, thereby improving the user's viewing experience.
[0069] The embodiment of the present application provides an image display device 100, which may include a light source module 10, a light conversion module 30, a monochromatic light modulator 50, and a controller 70. The light source module 10 includes a plurality of light emitting units 120, each of which is used to generate a first designated light L1. The light conversion module 30 is arranged on the light path where the multiple first designated lights L1 are located, and is used to convert the multiple first designated lights L1 into multiple second designated lights L2. Each second designated light L2 is formed by mixing at least two monochromatic lights in a preset time sequence.
[0070] The monochromatic light modulator 50 may include a plurality of modulation regions 520, which are arranged one-to-one on the optical path where the plurality of second designated light beams L2 are located, and each modulation region 520 is used to modulate the corresponding second designated light beam L2 to generate a corresponding display image.
[0071] Therefore, the light modulator in this embodiment adopts a monochromatic light modulator 50, and the display image is generated by emitting light in the three colors of R, G, and B in a time sequence, that is, the light modulator does not need to be provided with three color filters of R, G, and B. On the one hand, the overall volume and hardware cost of the image display device 100 can be reduced; on the other hand, due to the elimination of the color filter, the display brightness of the displayed image can be significantly improved compared with the light modulator in the three-chip liquid crystal display system, so as to ensure the display effect of the image display device 100.
[0072] The controller 70 is electrically connected to the light source module 10, and is used to adjust the input current values corresponding to the multiple light-emitting units 120. Since the multiple light-emitting units 120 and the multiple modulation areas 520 are in one-to-one correspondence, the controller 70 adjusts the input current values corresponding to the multiple light-emitting units 120 to achieve independent control of the display brightness of different modulation areas 520. For example, when the display image generated by a certain modulation area 520 requires a higher display brightness, the controller 70 can increase the input current value of the light-emitting unit 120 corresponding to the modulation area 520; conversely, when the display image generated by a certain modulation area 520 requires a lower display brightness, the controller 70 can reduce the input current value of the light-emitting unit 120 corresponding to the modulation area 520.
[0073] Therefore, the controller 70 in this embodiment can dynamically adjust the input current values corresponding to different light-emitting units 120 according to the display brightness of the display image to be generated. On the one hand, the power loss of the light source module 10 can be reduced; on the other hand, the dynamic contrast and dynamic picture display effect of the overall display image generated by the image display device 100 can be improved to improve the user's viewing experience.
[0074] In the specification of this application, certain words are used to refer to specific components in the specification and claims. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of the components as the criterion for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to"; "substantially" means that those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.
[0075] In the description of the present application, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", and "inside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are merely simplified descriptions for the convenience of describing the present application. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.
[0076] In this application, unless otherwise clearly specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be internal communication between two elements, or it can be only surface contact. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0078] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. An image display device, characterized in that: include: A light source module, comprising a plurality of light emitting units, each of which is used to generate a first designated light; A light conversion module is arranged on the optical path where the multiple first designated light rays are located, and is used to convert the multiple first designated light rays into multiple second designated light rays; wherein each of the second designated light rays is formed by mixing at least two monochromatic lights in a preset time sequence; A monochromatic light modulator, comprising a plurality of modulation areas, wherein the plurality of modulation areas are arranged one by one on the optical paths where the plurality of second designated light rays are located, and each modulation area is used to modulate the corresponding second designated light to generate a corresponding display image; as well as The controller is electrically connected to the light source module and is used to adjust the input current values corresponding to the plurality of light-emitting units.
2. The image display device according to claim 1, characterized in that The optical conversion module comprises an optical conversion component, which is arranged on an optical path where multiple paths of the first designated light are located, and is used to convert each path of the first designated light into a designated red light, a designated green light and a designated blue light at the preset timing; the designated red light, the designated green light and the designated blue light are mixed to form the second designated light; The controller is used to adjust at least one of the first input current value, the second input current value and the third input current value corresponding to the multiple light-emitting units to adjust the proportion of at least one of the specified red light, the specified green light and the specified blue light in the second specified light; the first input current value is the input current value of the light-emitting unit when the light conversion component generates the specified red light; the second input current value is the input current value of the light-emitting unit when the light conversion component generates the specified blue light; the third input current value is the input current value of the light-emitting unit when the light conversion component generates the specified green light.
3. The image display device according to claim 2, characterized in that The first designated light is blue light; the light conversion element includes a color wheel, and the color wheel includes a first fluorescent portion, a second fluorescent portion and a transmission portion that are connected to each other; the first fluorescent portion is used to generate the designated red light under the excitation of the first designated light; the second fluorescent portion is used to generate the designated green light under the excitation of the first designated light; the transmission portion is used to transmit the first designated light to generate the designated blue light.
4. The image display device according to claim 2, characterized in that: The light-emitting unit comprises a light-emitting chip and a yellow fluorescent element, the light-emitting chip is used to generate a first excitation light, and the first excitation light is blue light; The yellow fluorescent component covers the light emitting surface of the light emitting chip, and generates yellow fluorescence under the excitation of a part of the first excitation light; another part of the first excitation light transmits the yellow fluorescent component to form a second excitation light, and the second excitation light is mixed with the yellow fluorescence to form the first designated light.
5. The image display device according to claim 4, characterized in that: The light conversion element includes a color filter wheel, which includes a first color filter portion, a second color filter portion and a third color filter portion that are connected to each other; the first color filter portion is used to filter the first designated light to produce the designated red light; the second color filter portion is used to filter the first designated light to produce the designated green light; the third color filter portion is used to filter the first designated light to produce the designated blue light.
6. The image display device according to claim 2, characterized in that: The light conversion module further comprises a first lens assembly, which is disposed between the light conversion element and the monochromatic light modulator and is located on the optical path of the plurality of second designated light rays; The first lens assembly is used to image the light emitting surfaces of the plurality of light emitting units respectively and then make the light incident on the plurality of modulation areas; or, the first lens assembly is used to image the light emitting surface of the light conversion element and then make the light incident on the plurality of modulation areas.
7. The image display device according to claim 2, characterized in that: The light conversion module further includes a first lens assembly and a second lens assembly, wherein the second lens assembly is disposed between the light source module and the light conversion component and is located on the optical path of the plurality of first designated light rays, and is used to image the light emitting surfaces of the plurality of light emitting units and then incident on the light conversion component; The first lens assembly is disposed between the light conversion element and the monochromatic light modulator and is located on the optical path of the plurality of second designated light rays, and is used for imaging the light emitting surface of the light conversion element and then incident on the plurality of modulation areas.
8. The image display device according to any one of claims 1 to 7, characterized in that: The monochromatic light modulator includes a monochromatic liquid crystal display screen.
9. The image display device according to any one of claims 1 to 7, characterized in that: The light source module includes a plurality of light-emitting chips and a substrate, wherein the plurality of light-emitting chips are arranged on the substrate in an M*N array; wherein M is the number of the light-emitting chips in a first direction, and N is the number of the light-emitting chips in a second direction, and the second direction intersects with the first direction.
10. The image display device according to claim 9, characterized in that: The monochromatic light modulator comprises an effective display area and an invalid display area, wherein the effective display area comprises a plurality of modulation areas, and the invalid display area is arranged around the periphery of the effective display area; the length of the effective display area in the first direction is H, the length of the effective display area in the second direction is V, the minimum spacing between the outer contour of the invalid display area and the outer contour of the effective display area in the first direction is h, and the minimum spacing between the outer contour of the invalid display area and the outer contour of the effective display area in the second direction is v; The distance between two adjacent light-emitting chips in the first direction is m, and the distance between two adjacent light-emitting chips in the second direction is n; The length a of each of the light-emitting chips in the first direction satisfies the following formula: a<(((H+2h)*sin(θ)*k / sin(γ)) / M)-(m*(M-1)); The length b of each of the light-emitting chips in the second direction satisfies the following formula: b<(((v+2 v )*sin(θ)*k / sin(γ)) / N)-(n*(N-1)); Wherein, θ is the light cone angle at the monochromatic light modulator; k is the lens transmittance; and γ is the Lambertian light collection angle.