Projection device and method based on partitioned light sources

Abstract

The embodiment of the invention provides a projection device and method based on a partition light source, and the device comprises at least one light source which is provided with a plurality of partitions, and each partition is provided with a sub-light source; the controller is used for adjusting the brightness parameter and the color parameter of each sub light source in the light source according to the brightness and color distribution of an input image; the light path processor is provided with a photon energy elimination layer and is used for filtering photons which do not meet the preset form requirement in the light source, and the light path processor is used for processing the effective light emitting part of the sub light source to obtain a target light source for projection. According to the device, loss and scattering of light in the projection process are reduced, the color of a projection picture is more gorgeous, and the contrast ratio is higher.

Description

Technical Field

[0001] The present invention relates to the field of light and shadow imaging illumination technology and controllable programming technology, and in particular to a projection device and method based on a partitioned light source. Background Art

[0002] With the rapid development of projection technology, LCD panels are constantly innovating, and the brightness of light sources is continuously improving. Projection equipment has gradually become an indispensable part of modern home entertainment and business presentations. Traditional projectors use a variety of light source technologies, among which high-pressure mercury lamps are the earliest used in projectors. Although they can provide high brightness output, their service life is relatively short, and frequent replacement of light sources has become a major pain point for users. At the same time, the startup and cooling time of high-pressure mercury lamps is long, which makes it difficult to meet the modern demand for ready-to-use. In addition, their high energy consumption and large heat release make the heat dissipation system complex and large.

[0003] As an emerging light source technology, laser light source has been warmly welcomed by the market for its high brightness and long life. However, the cost of laser light source is relatively high, especially in high-resolution equipment, the complexity of laser module and optical system is significantly increased. In addition, the point light characteristics of laser light source are prone to produce mottled effect in the optical processing process, which affects the uniformity of the picture and greatly reduces the audience's viewing experience. A single laser light source cannot achieve a contrast ratio of millions to one, and photons are still emitted for pure black in the picture.

[0004] OLED and other display technologies excel in direct-view display devices, but they are not up to par in the projection field. Especially in high-brightness and high-contrast scenes, the aging and energy consumption issues of OLED panels have not been completely resolved, which limits its widespread application in the projection field.

[0005] In addition to the problems of light source technology itself, existing projection technology also has some common shortcomings. For example, the dynamic range is limited. It is difficult for traditional projectors to achieve accurate regional brightness adjustment, resulting in frequent problems such as highlight overflow and loss of dark details. Another example is energy consumption and thermal management issues. High-brightness light sources are usually accompanied by high energy consumption and heat emissions, which puts higher requirements on the cooling system of the equipment and increases the user's cost of use.

[0006] Due to the cost-effectiveness of single-light source projection and the continuous iteration of the optical path, it has rapidly occupied the market in recent years. However, as projection technology continues to advance, the inherent defects of single-light source projection technology have gradually emerged. The working principle of single-light source projection is that a single light source passes through the screen and a specific optical path, and finally the image is projected onto the screen by the lens. Although this technology is popular for its cost-effectiveness and simplicity, the problem of uneven brightness of the picture has been difficult to solve. Due to the characteristics of a single light source, the brightness of the center area of ​​the picture is higher, while the surrounding area is relatively dark. This uneven brightness distribution seriously affects the audience's visual enjoyment. In addition, single-light source projection also has obvious deficiencies in dark field performance. Since the light source needs to be kept on continuously, it is difficult to achieve complete black even in dark scenes, resulting in poor contrast. At the same time, during the production and use of projection equipment, it is extremely sensitive to tiny particles such as dust. Once the screen or optical path device is contaminated with dust, obvious black spots will form on the picture, and it is quite difficult to clean.

[0007] In order to overcome these defects, a variety of projection technology solutions have emerged on the market. However, these solutions have their own advantages and disadvantages. For example, although the single light source with a single color LCD projection technology has a low cost, the brightness uniformity and contrast of the picture still need to be improved; the three-lamp projection in DLP mode has relatively good picture performance, but the price is high and the contrast is still insufficient; and the three-LCD screen projection has excellent picture quality, but the cost is high. At the same time, the three-LCD screen projection needs to consider the synchronization of the three LCD screens. Such synchronization needs to consider the time domain consistency, and cannot be simply from the time code consistency or frame consistency. Figure 1 The light field and the final image are solved consistently, so many projections of such structures will have slight ghosting. Summary of the invention

[0008] The purpose of the embodiments of the present invention is to provide a projection device and method based on a partitioned light source, which reduces the loss and scattering of light during the projection process, can achieve the effect of zero scattering of black photons in the dark field, and make the projected image more colorful and with higher contrast.

[0009] In order to achieve the above object, an embodiment of the present invention provides a projection device based on a partitioned light source, the projection device comprising:

[0010] At least one light source, wherein the light source is provided with a plurality of partitions, each partition being provided with a sub-light source;

[0011] A controller, used to adjust the brightness parameters and color parameters of each sub-light source in the light source according to the brightness and color distribution of the input image;

[0012] An optical path processor is provided with a photon energy elimination layer for filtering out photons in the light source that do not meet the predetermined morphological requirements. The optical path processor is used to process the effective light-emitting part of the sub-light source to obtain a target light source for projection.

[0013] Optionally, the sub-light source is at least one of an RGB light source, a W light source, an R light source, a G light source and a B light source;

[0014] The sub-light source is provided with a lens array.

[0015] Optionally, the optical path processor includes a light cutter, a beam splitter and an optical path channel, and the light cutter, beam splitter and optical path channel can be cross-superimposed and used;

[0016] The light chopper is used to control the irradiation range of light and correct the propagation direction of photons;

[0017] The beam splitter is used to change the parallel ratio of the parallel light from the light source before and after the incident light, constrain light sources of different areas to light sources of a specified area, and control the range of the light source energy;

[0018] The photon energy elimination layer is at least arranged in an inner wall of the light cutter, the light beam collector and the light path channel;

[0019] The photon energy elimination layer is a carbon nanotube array coating, which is used to convert the photon consumption in the light source that does not meet the predetermined morphological requirements into heat energy;

[0020] The density range of the carbon nanotube array coating is at least 1.0×10 6 ~1.5×10 6 Root / cm 2 .

[0021] Optionally, adjusting the brightness parameters and color parameters of each sub-light source in the light source according to the brightness and color distribution of the input image includes:

[0022] Dividing the input image into regions to obtain a plurality of image blocks;

[0023] Determining brightness and color adjustment parameters of the image block according to the brightness and color distribution of the image block;

[0024] Adjusting brightness parameters and color parameters of each sub-light source in the light source according to the adjustment parameters;

[0025] The brightness parameters include: highlight enhancement coefficient, average brightness compensation coefficient and gamma value;

[0026] The color parameters include: color gamut conversion parameters and color compensation parameters.

[0027] Optionally, the color value of the light source includes:

[0028] The color value of the light source includes:

[0029] L max =max(R,G,B)

[0030] L avg =0.2126R+0.7152G+0.0722B

[0031] The sub-light source is driven as follows:

[0032]

[0033] Where: L max is the maximum color value of the light source, R, G, B are the color values ​​of red, green and blue respectively, L avg is the average color value of the light source,

[0034] I LED To drive the sub-light source, is the maximum color value of the input image, is the color average of the input image,

[0035] α is the highlight enhancement coefficient, β is the average brightness compensation coefficient, and γ is the gamma value.

[0036] Optionally, the light path processor is used to process the effective light emitting part of the sub-light source to obtain a target light source, including:

[0037] The optical path processor includes a collimator for integrating and collimating the effective light-emitting portion of the sub-light source, wherein the effective light-emitting portion satisfies the color value threshold requirement;

[0038] The collimator is an asymmetric free-form surface collimator.

[0039] Optionally, the projection device further includes a heat dissipation system.

[0040] The heat dissipation system comprises an aluminum nitride ceramic substrate, a vacuum chamber heat sink and microchannel liquid cooling, and is used for heat dissipation of the projection device.

[0041] Optionally, the multiple sub-light sources and the input image meet time frame synchronization based on a time code or an image frame.

[0042] On the other hand, the present application also proposes a projection method based on a partitioned light source, the method comprising:

[0043] Adjusting brightness parameters and color parameters of each sub-light source in the light source according to the brightness and color distribution of the input image, wherein the light source is provided with a plurality of partitions, each of which is provided with a sub-light source;

[0044] filtering out photons in the light source that do not meet predetermined morphological requirements;

[0045] The effective light emitting part of the sub-light source is processed to obtain a target light source.

[0046] On the other hand, the present invention further proposes a machine-readable storage medium, on which instructions are stored, and when the instructions are executed by a processor, the processor is configured to execute the above-mentioned projection method based on a partitioned light source.

[0047] A projection device based on a partitioned light source of the present invention comprises: at least one light source, the light source is provided with a plurality of partitions, each partition is provided with a sub-light source; a controller, used to adjust the brightness parameters and color parameters of each sub-light source in the light source according to the brightness and color distribution of the input image; an optical path processor, the optical path processor is provided with a photon energy elimination layer, used to filter out photons in the light source that do not meet the predetermined morphological requirements, and the optical path processor is used to process the effective light-emitting part of the sub-light source to obtain a target light source for projection. The present invention realizes precise adjustment and full-color control of local light sources by combining partitioned light sources with dynamic image algorithms, and uses a photon energy elimination layer to eliminate photon interference, thereby reducing the loss and scattering of light during the projection process, making the projected image more colorful and with higher contrast.

[0048] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0050] Figure 1 It is a schematic diagram of a projection device based on a partitioned light source of the present invention;

[0051] Figure 2 It is a schematic diagram of a specific implementation of the present invention;

[0052] Figure 3 It is another specific embodiment schematic diagram of the present invention;

[0053] Figure 4 This is a schematic diagram of the Mini LED array microstructure;

[0054] Figure 5 is a flow chart of the dynamic dimming algorithm of the present invention;

[0055] Figure 6It is a schematic flow chart of a projection method based on a partitioned light source of the present invention.

[0056] Description of Reference Numerals

[0057] 100- Projection device based on zoned light source;

[0058] 200-light source;

[0059] 300-controller;

[0060] 400-Light Path Processor. DETAILED DESCRIPTION

[0061] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0062] It should be noted that the acquisition, transmission, storage, use, and processing of data in the technical solution of this application are in compliance with the relevant provisions of national laws and regulations. In the embodiments of this application, some existing solutions in the industry such as certain software, components, and models may be mentioned, which should be considered as exemplary. Their purpose is only to illustrate the feasibility of implementing the technical solution of this application, but it does not mean that the applicant has or will necessarily use the solution.

[0063] like Figure 1 As shown, an embodiment of the present invention provides a projection device based on a partitioned light source, and the projection device 100 based on a partitioned light source includes: at least one light source 200, wherein the light source 200 is provided with a plurality of partitions, and each partition is provided with a sub-light source; a controller 300, for adjusting the brightness parameters and color parameters of each sub-light source in the light source according to the brightness and color distribution of an input image; and an optical path processor 400, wherein the optical path processor 400 is provided with a photon energy elimination layer, for filtering out photons in the light source that do not meet predetermined morphological requirements, and the optical path processor 400 is used to process the effective light-emitting part of the sub-light source to obtain a target light source for projection.

[0064] According to a specific implementation, the sub-light source is at least one of an RGB light source, a W light source, an R light source, a G light source, and a B light source. The light source may be an LED, a laser, etc. For example, the light source may be a Mini LED light source. The small size and high efficiency of Mini LED make the light source system more compact, while significantly improving the utilization rate of light energy.

[0065] For example, taking the Mini LED array as an example, each partition contains RGB three-color LEDs, and the Mini LED array parameters include: substrate size: 62×35mm; single partition structure: 8×8 LED matrix, containing 36 RGB LEDs (single size 0.2×0.2mm); driving characteristics: PWM frequency 100kHz, duty cycle 1-100% adjustable. Through a high-dynamic pure white and / or full-color LED lamp bead array, combined with advanced dynamic image algorithms, precise adjustment and full-color control of local light sources are achieved. It not only improves the brightness and color performance of the projection equipment, but also gives it higher flexibility and adaptability, which can meet different scenarios and needs. The light source 200 is provided with multiple partitions, which can divide the light source into 32×32 blocks.

[0066] For example, the input signal is: 12-bit HDR video (HLG / PQ); color gamut conversion: BT.2020→DCI-P3 (3D-LUT correction); brightness analysis: divide the picture into 32×32 blocks (corresponding to light source partitions); the color value of the light source includes:

[0067] L max =max(R,G,B)

[0068] L avg =0.2126R+0.7152G+0.0722B

[0069] The sub-light source is driven as follows:

[0070]

[0071] Where: L max is the maximum color value of the light source, R, G, B are the color values ​​of red, green and blue respectively, L avg is the color average of the light source, I LED To drive the sub-light source, is the maximum color value of the input image, is the color average of the input image, α is the highlight enhancement coefficient, β is the average brightness compensation coefficient, and γ is the gamma value. Among them, β = 0.3 (average brightness compensation coefficient), γ = 2.4 (EOTF gamma value).

[0072] The optical drive method can also meet the following requirements according to the CIE LAB color space (chromaticity compensation):

[0073]

[0074] Where: I drive (x, y) is the driving current or driving signal at the position (x, y), which is used to control the brightness of the sub-light source. targetis the target brightness value at position (x, y), that is, the brightness level expected to be achieved, C chroma (x, y) is the chromaticity compensation value at position (x, y), which is used to adjust the saturation or hue of the color to ensure color accuracy and consistency. This formula is used to calculate the driving current or signal required for each sub-light source given the target brightness and chromaticity compensation. In this way, the brightness and color of the display device can be accurately controlled, thereby improving the quality and accuracy of the display effect.

[0075] The CIE LAB color space is a device-independent color space that more accurately represents the color differences perceived by the human eye. By performing chromaticity compensation in the CIE LAB color space, the saturation and hue of the color can be better adjusted, resulting in a more natural and accurate color display.

[0076] Gamma value (γ) is used to describe the nonlinear relationship between input signal and output brightness. In display technology, gamma value is usually used to adjust the brightness and contrast of the image to adapt to the visual characteristics of the human eye (k = 0.8-1.2) is the brightness compensation coefficient, and chroma is the chromaticity compensation item.

[0077] The sub-light source is provided with a lens array (MLA), which has the function of focusing and correcting. Specifically, the micro lens array (MLA) is covered on the Mini LED array to improve the collimation efficiency and projection efficiency of the light. The curvature radius gradient of the lens includes: center R = 0.8mm, edge R = 1.2mm, and the light efficiency improvement formula is: Efficiency = k × (1 + e-α (R-R0))

[0078] \text{Efficiency}=k\times(1+e^{-\alpha(R-R_0)})

[0079] Efficiency=k×(1+e-α(R-R0))

[0080] Among them, k = 0.73 is the experimental fitting coefficient.

[0081] The controller 300 includes an FPGA image processor or / and a high-speed dynamic image processor and a dynamic dimming algorithm chip, which is used to analyze the brightness and color distribution of the input image in real time, and dynamically adjust the brightness and color of each light source partition. Specifically, the dynamic dimming of the controller 300 includes: dividing the input image into regions to obtain multiple image blocks; analyzing the brightness and color distribution of each image block, and calculating the corresponding brightness and color adjustment parameters; dynamically adjusting the brightness and color output of the corresponding light source partition according to the brightness and color adjustment parameters; wherein the brightness adjustment parameters include a highlight enhancement coefficient, an average brightness compensation coefficient and a gamma value, and the color adjustment parameters include a color gamut conversion parameter and a color compensation parameter.

[0082] The optical path processor comprises a light cutter, a light beamer and an optical path channel; the photon energy elimination layer is arranged in at least one inner wall of the light cutter, the light beamer and the optical path channel; the photon energy elimination layer is a carbon nanotube array coating, which is used to convert the photon consumption in the light source that does not meet the predetermined morphological requirements into heat energy; the density range of the carbon nanotube array coating is at least 1.0×10 6 ~1.5×10 6 Root / cm 2 .

[0083] The optical path processor is used to process the effective light-emitting part of the sub-light source to obtain the target light source, including: the optical path processor includes a collimator, which is used to integrate and collimate the effective light-emitting part of the sub-light source, and the effective light-emitting part satisfies the color value threshold requirement.

[0084] According to a specific embodiment, the collimator is an asymmetric free-form surface collimator, and its surface equation is: Z = 1 + 1 - (k + 1) c2r2cr2 + A1r4 + A2r6

[0085] Z=1+\frac{1-(k+1)c^2r^2}{cr^2+A_1r^4+A_2r^6}

[0086] Z=1+cr2+A1r4+A2r61-(k+1)c2r2

[0087] The above parameters are all design parameters used to optimize aberration correction and light distribution in the optical path.

[0088] The photon energy elimination layer is a carbon nanotube array coating, which is used to convert the photon consumption that does not meet the predetermined morphological requirements in the integrated light source into heat energy; the density range of the carbon nanotube array coating is at least 1.0×10-1.5×10 roots / cm 2The carbon nanotube arrangement coating significantly reduces reflection and scattering in the light path, improving light utilization and color purity. Specifically, the carbon nanotube anti-reflection layer includes: density 1.2×10 roots / cm 2 , the performance parameters are shown in the following table:

[0089] Wavelength (nm) Reflectivity Absorption rate Scattering rate 450 0.08％ 0.15％ 0.02％ 550 0.05％ 0.12％ 0.01％ 650 0.12％ 0.18％ 0.03％

[0090] This application uses a carbon nanotube array coating to confine photons and convert their consumption into heat energy, which is dissipated through heat conduction, creating unprecedented purity for the optical path. This method can seamlessly replace the useless reflected light absorption unit of DLP and create a pure black visual effect under the same light source.

[0091] The method of adjusting the brightness parameters and color parameters of each sub-light source in the light source according to the brightness and color distribution of the input image includes: dividing the input image into regions to obtain multiple image blocks; determining the adjustment parameters of the brightness and color of the image blocks according to the brightness and color distribution; adjusting the brightness parameters and color parameters of each sub-light source in the light source according to the adjustment parameters; the brightness parameters include: highlight enhancement coefficient, average brightness compensation coefficient and gamma value; the color parameters include: color gamut conversion parameters and color compensation parameters.

[0092] The projection device further comprises a heat dissipation system, which comprises an aluminum nitride ceramic substrate, a vacuum chamber heat sink and microchannel liquid cooling, and is used for heat dissipation of the projection device.

[0093] According to a specific implementation, the heat dissipation system is a three-stage heat dissipation structure: the first-stage heat dissipation is an aluminum nitride ceramic substrate (thermal conductivity 180W / m·K); the second-stage heat dissipation is a vacuum chamber heat sink (thickness 2mm, thermal resistance 0.08℃ / W); the third-stage heat dissipation is microchannel liquid cooling (flow rate 0.5L / min, pressure drop <15kPa).

[0094] The temperature control model of the heat dissipation system is:

[0095]

[0096] Where: h = 250W / m 2 K (convection coefficient), A = 0.12m 2 (heat dissipation area), C = 480 J / K (heat capacity). The heat dissipation system effectively reduces the heat generated by the light source module when operating at high brightness, ensuring stable operation of the system.

[0097] According to a specific implementation mode, Figure 2As shown, the projection device based on the partitioned light source of the present application includes four core modules: light source module, optical path system, control unit and heat dissipation system. Among them, the light source module can be a MiniLED array (taking 1024 partitions as an example) + microlens array (MLA); the optical path system includes a collimator group, a light processing device group, an electromagnetic wave elimination carbon nanometer group and a projection lens; the control unit includes an FPGA image processor or / and a high-speed dynamic image processor (including LCD) and a dynamic dimming algorithm; the heat dissipation system includes a heat spreader and microchannel liquid cooling. The dynamic dimming algorithm includes brightness analysis, partition drive calculation and color gamut conversion.

[0098] Due to the uncertainty of photons and the diffuse reflection characteristics of light that are difficult to eliminate, in addition to beam-forming and collimating the light, this application also proposes to confine photons through carbon nanotubes, and convert their consumption into heat energy, which is dissipated through heat conduction, creating unprecedented purity for the optical path, realizing the consumption and transfer of the total energy of electromagnetic waves, and ensuring the purity of the light field.

[0099] In order to cope with complex scenes with high illumination, Figure 3 In the process, the RGB monochrome images are superimposed in the light combiner and then projected to the target. Figure 3 As shown, in multiple modules, multiple sub-light sources and input images of the present application meet the time frame synchronization based on time code or image frame. Specifically, image mixing is performed in accordance with the time frame synchronization principle (time code or image). For time frame synchronization technology, the stability and technical advantages are significantly improved compared to time domain synchronization.

[0100] Figure 4 This is a schematic diagram of the Mini LED array microstructure. Figure 4 The partition layout and coverage of the microlens array (MLA) are marked in the figure, where the protruding part is a microlens group composed of lenses of various specifications and sizes, which are dynamically adjusted according to the characteristics of the light source (it can also be lenses of other shapes).

[0101] The dynamic dimming algorithm of the control is as follows Figure 5 As shown, it includes: dividing the input image into regions to obtain multiple image blocks; analyzing the brightness and color distribution of each image block, and calculating the corresponding brightness and color adjustment parameters; dynamically adjusting the brightness and color output of the corresponding light source partition according to the brightness and color adjustment parameters; wherein the brightness adjustment parameters include a highlight enhancement coefficient, an average brightness compensation coefficient and a gamma value, and the color adjustment parameters include a color gamut conversion parameter and a color compensation parameter.

[0102] On the other hand, the present invention also proposes a projection method based on a partitioned light source, such as Figure 6As shown, the method includes: step S101 is to adjust the brightness parameters and color parameters of each sub-light source in the light source according to the brightness and color distribution of the input image, the light source is provided with a plurality of partitions, each partition is provided with a sub-light source; step S102 is to filter out the photons in the light source that do not meet the predetermined morphological requirements; step S103 is to process the effective light-emitting part of the sub-light source to obtain the target light source.

[0103] According to a specific implementation, filtering out the photons in the integrated light source that do not meet the predetermined morphological requirements includes: consuming and converting the photons in the integrated light source that do not meet the predetermined morphological requirements into heat energy.

[0104] The projection method first obtains image data to be projected; then divides and analyzes the image data into regions to obtain brightness and color distribution information of each image block; calculates corresponding brightness and color adjustment parameters based on the brightness and color distribution information; dynamically adjusts the brightness and color output of each partition in the partition light source module through a control unit; and projects the modulated light onto a projection surface through an optical path system to achieve a high dynamic range (HDR) display effect.

[0105] The present invention solves the problems of uneven brightness, insufficient contrast, thermal management bottleneck, etc. existing in traditional projection technology by adopting technologies such as gradient curvature microlens array, vertical carbon nanotube coating, dynamic dimming algorithm and three-level heat dissipation structure. The present invention has high light efficiency, high dynamic range, low scattering rate and excellent thermal management performance, and can be widely used in home theater, digital projection, stage lighting and other fields, significantly improving the projection image quality and user experience.

[0106] A projection device based on a partitioned light source of the present invention comprises: at least one light source, the light source is provided with a plurality of partitions, each partition is provided with a sub-light source; a controller, used to adjust the brightness parameters and color parameters of each sub-light source in the light source according to the brightness and color distribution of the input image; an optical path processor, the optical path processor is provided with a photon energy elimination layer, used to filter out photons in the light source that do not meet the predetermined morphological requirements, and the optical path processor is used to process the effective light-emitting part of the sub-light source to obtain a target light source for projection. The present invention realizes precise adjustment and full-color control of local light sources by combining partitioned light sources with dynamic image algorithms, and uses a photon energy elimination layer to eliminate photon interference, thereby reducing the loss and scattering of light during the projection process, making the projected image more colorful and with higher contrast.

[0107] On the other hand, an embodiment of the present invention provides a storage medium having a program stored thereon, and the program, when executed by a processor, implements the projection method based on a partitioned light source.

[0108] An embodiment of the present invention provides a processor, which is used to run a program, wherein the projection method based on a partitioned light source is executed when the program is run.

[0109] The embodiment of the present invention provides a device, which includes a processor, a memory, and a program stored in the memory and can be run on the processor. When the processor executes the program, the following steps are implemented: at least one light source, the light source is provided with multiple partitions, each partition is provided with a sub-light source; a controller is used to adjust the brightness parameters and color parameters of each sub-light source in the light source according to the brightness and color distribution of the input image; an optical path processor, the optical path processor is provided with a photon energy elimination layer, which is used to filter out photons in the light source that do not meet the predetermined morphological requirements, and the optical path processor is used to process the effective light-emitting part of the sub-light source to obtain a target light source for projection. The device in this article can be a server, PC, PAD, mobile phone, etc.

[0110] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0111] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing device to work in a specific way, so that the instructions stored in the computer-readable memory produce a product including an instruction device, which implements the functions specified in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0112] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0113] Memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. Memory is an example of a computer-readable medium. Computer-readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, modules of programs or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include temporary computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0114] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0115] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A projection device based on a partitioned light source, characterized in that: The projection device comprises: At least one light source, wherein the light source is provided with a plurality of partitions, each partition being provided with a sub-light source; A controller, used to adjust the brightness parameters and color parameters of each sub-light source in the light source according to the brightness and color distribution of the input image; An optical path processor is provided with a photon energy elimination layer for filtering out photons in the light source that do not meet the predetermined morphological requirements. The optical path processor is used to process the effective light-emitting part of the sub-light source to obtain a target light source for projection.

2. The projection device according to claim 1, characterized in that: The type of the sub-light source is at least one of an RGB light source, a W light source, an R light source, a G light source and a B light source; The sub-light source is provided with a lens array.

3. The projection device according to claim 1, characterized in that: The optical path processor includes a light cutter, a beam splitter and an optical path channel, and the light cutter, beam splitter and optical path channel can be cross-superimposed and used; The light cutter is used to control the irradiation range of light and correct the propagation direction of photons; The beam splitter is used to change the parallel ratio of the parallel light from the light source before and after the incident light, constrain light sources of different areas to light sources of a specified area, and control the range of the light source energy; The photon energy elimination layer is at least arranged in an inner wall of the light cutter, the light beam collector and the light path channel; The photon energy elimination layer is a carbon nanotube array coating, which is used to convert the photon consumption in the light source that does not meet the predetermined morphological requirements into heat energy; The density range of the carbon nanotube array coating is at least 1.0×10 6 ~1.5×10 6 Root / cm 2 .

4. The projection device according to claim 1, characterized in that: The step of adjusting the brightness parameters and color parameters of each sub-light source in the light source according to the brightness and color distribution of the input image includes: Dividing the input image into regions to obtain a plurality of image blocks; Determining brightness and color adjustment parameters of the image block according to the brightness and color distribution of the image block; Adjusting brightness parameters and color parameters of each sub-light source in the light source according to the adjustment parameters; The brightness parameters include: highlight enhancement coefficient, average brightness compensation coefficient and gamma value; The color parameters include: color gamut conversion parameters and color compensation parameters.

5. The projection device according to claim 1 or 4, characterized in that: The color value of the light source includes: L max =max(R,G,B) L avg =0.2126R+0.7152G+0.0722B The sub-light source is driven as follows: Where: L max is the maximum color value of the light source, R, G, B are the color values ​​of red, green and blue respectively, L avg is the average color value of the light source, I LED To drive the sub-light source, is the maximum color value of the input image, is the color average of the input image, α is the highlight enhancement coefficient, β is the average brightness compensation coefficient, and γ is the gamma value.

6. The projection device according to claim 1, characterized in that: The optical path processor is used to process the effective light-emitting part of the sub-light source to obtain a target light source, including: The optical path processor includes a collimator for performing integrated collimation processing on the effective light-emitting portion of the sub-light source, wherein the effective light-emitting portion satisfies the color value threshold requirement; The collimator is an asymmetric free-form surface collimator.

7. The projection device according to claim 1, characterized in that: The projection device also includes a heat dissipation system. The heat dissipation system comprises an aluminum nitride ceramic substrate, a vacuum chamber heat sink and microchannel liquid cooling, and is used for heat dissipation of the projection device.

8. The projection device according to claim 1, characterized in that: The multiple sub-light sources and the input image meet the time frame synchronization based on the time code or the image frame.

9. A projection method based on a partitioned light source, characterized in that: The method includes: Adjusting brightness parameters and color parameters of each sub-light source in the light source according to the brightness and color distribution of the input image, wherein the light source is provided with a plurality of partitions, each of which is provided with a sub-light source; filtering out photons in the light source that do not meet predetermined morphological requirements; The effective light emitting part of the sub-light source is processed to obtain a target light source.

10. A machine-readable storage medium having instructions stored thereon, characterized in that: When the instruction is executed by a processor, the processor is configured to perform the projection method based on a zoned light source as claimed in claim 9.

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