CN108234976B - DLP projection display driving system supporting various laser light sources - Google Patents
DLP projection display driving system supporting various laser light sources Download PDFInfo
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- CN108234976B CN108234976B CN201711475423.9A CN201711475423A CN108234976B CN 108234976 B CN108234976 B CN 108234976B CN 201711475423 A CN201711475423 A CN 201711475423A CN 108234976 B CN108234976 B CN 108234976B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3161—Modulator illumination systems using laser light sources
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2013—Plural light sources
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
Abstract
The invention discloses a DLP projection display driving system of multiple laser light sources, which is characterized in that: the system is provided with a signal processing and main controller, wherein the signal processing and main controller is connected with a video decoding circuit, a DMD driving module, a fluorescent wheel driving module, a color wheel driving module, an optical temperature sensor module, a laser light source driving interface, a power management module, an android intelligent operating system module and an audio processing and power amplification module; the RGB three-primary-color laser light source is connected with the RGB three-primary-color laser module in a driving way to emit three-color laser; the PMD1000 chip is respectively in signal connection with the laser light source driver, the fluorescent wheel and the color wheel, laser is emitted by the laser module, fluorescent powder is arranged on the fluorescent wheel and can be excited to emit fluorescent light with corresponding colors, adjustment is not needed on a hardware driving board according to different types of selected laser light sources, and only corresponding driving interfaces are required to be inserted, so that the universal purpose on hardware is realized, and the Digital Light Processing (DLP) projection display driver is suitable for DLP projection display drivers of various laser light sources.
Description
Technical Field
The invention relates to the technical field of laser display, in particular to a DLP projection display driving system supporting various laser light sources.
Background
The development direction of display technology successively goes through black and white display, color display and flat panel display, and the flat panel display is followed by the flexible display era. The laser projection display accords with the development trend of flexible display, and has the characteristics of long service life, wide color gamut, high brightness and energy conservation. The laser display technique takes red, green and blue (RGB) tricolor laser as a light source. The color gamut coverage rate can reach 90%, and meanwhile, the characteristics of high resolution, digital signals and the like in the digital era are completely inherited, so that the most perfect color restoration of human beings is realized. Laser light sources are the best light sources to meet various high-end display requirements. The laser display technology is called "revolution in human visual history" in the industry.
The traditional laser projection display comprises a laser projection display driving board, a DMD circuit board, a projection lens, a laser driving circuit, a laser module, a projection screen and a switching power supply; video signals such as television signals, network video data, USB, HDMI and VGA are input to the laser display drive board, video output signals in a unified format are formed after signal processing on the drive board, the video signals in the unified format are input to the DMD circuit board, the video signals are converted into video light to be output, images are projected onto a screen through a projection lens, and the laser drive circuit and the laser module are used for providing laser light sources required by projection display. In mainstream laser projection display, a laser light source of blue laser excited fluorescent powder and a laser light source of RGB (red, green and blue) three-primary-color pure laser exist, different laser light sources correspond to different driving systems, and a design method of a laser projection display driving system compatible with different laser light sources does not appear in the market.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention aims to provide a DLP projection display driving system supporting multiple laser light sources, which can implement the common use on hardware by only plugging corresponding driving interfaces without adjusting the hardware driving board according to the different types of the selected laser light sources, and is suitable for DLP projection display driving of multiple laser light sources.
In order to achieve the purpose, the invention adopts the technical scheme that: this multiple laser light source's DLP projection display drive system, its characterized in that: the system is provided with a signal processing and main controller, wherein the signal processing and main controller is connected with a video decoding circuit, a DMD driving module, a fluorescent wheel driving module, a color wheel driving module, an optical temperature sensor module, a laser light source driving interface, a power management module, an android intelligent operating system module and an audio processing and power amplification module; the signal processing and main controller consists of a PMD1000 chip, a DAD2000 chip and a DDP4422 chip, wherein the DDP4422 chip is used as the main controller, the DAD2000 chip is responsible for resetting the DMD chip, and the PMD1000 chip provides working voltage and control signals of a fan device; the laser light source driving interface comprises RGB (red, green and blue) tricolor PWM (pulse width modulation) connected with the DDP4422 chip, the RGB tricolor PWM is connected with an RGB tricolor laser light source driver, and the RGB tricolor laser light source driver is connected with an RGB tricolor laser module to emit tricolor laser; the PMD1000 chip is respectively in signal connection with a laser light source driver, a fluorescent wheel and a color wheel, the laser light source driver is connected with a laser module, the laser module emits laser, fluorescent powder is arranged on the fluorescent wheel, the fluorescent wheel can be excited to emit fluorescent light with corresponding colors, the fluorescent powder and the color of the laser emitted by the laser are used for forming three primary colors together, and the three primary colors are used as a projection light source to provide illumination for the optical machine part; in operation, the video decoding module receives various video signals, converts the various video signals into video signals with a uniform format, and outputs the video signals to the signal processing and main control chip DDP4422, wherein the various video signals include: television signals, network video data, USB, HDMI and VGA video signals; selecting an AFE1000 of TI as a Video decoding chip on the signal support of composite Video, S-Video, component Video and modular VGA; the signal processing and main controller is used for controlling the operation of the whole display system and decoding and converting the video signals input into the display system, all the input signals enter the DDP4422 to be processed at the front end and then to be converted at the frame rate, so that the input signals are unified into one frame rate; then, the image quality is improved, the color is enhanced, and the tone is adjusted; the resolution of an input image is zoomed into the resolution of a DMD, the image format is converted into a format supporting the display of the DMD, and the image is finally optimized by utilizing technologies such as extreme color, dynamic black compensation and the like, so that a perfect projection effect is realized; the DMD driving module is used for receiving the data converted by the signal processing module for displaying, the data processed by the DDP4422 chip is transmitted to the DMD chip through LVDS, the deflection angle of each pixel micro lens is controlled by binary pulse width modulation, and light is reflected to a projection screen.
RGB three primary colors laser module includes red laser light source control unit, green laser light source control unit and blue laser light source control unit, three-color semiconductor laser module correspondingly includes: red, green and blue semiconductor lasers.
The laser module is a monochromatic laser or a bicolor laser, and is driven to emit laser with one or two colors.
Adopt above-mentioned technical scheme's beneficial effect: this multiple laser light source's DLP projection display drive system has the drive system of the pure laser of drive RGB three-colour simultaneously and drives the drive system that monochromatic or double-colored laser arouses the fluorescence wheel, can be according to the difference of the type of the laser light source of selecting, need not adjust on the hardware drive plate, only need peg graft the drive interface that corresponds to general on the realization hardware, the DLP projection display drive system who is applicable to multiple laser light source.
Drawings
The following describes in further detail specific embodiments of the present invention with reference to the accompanying drawings.
FIG. 1 is a block diagram of a projection display driving system supporting multiple laser light sources;
FIG. 2 is a block diagram of a projection display driving system supporting RGB three primary color laser light sources;
FIG. 3 is a block diagram of a projection display driving system supporting a single or dual color laser-excited fluorescent wheel light source.
Detailed Description
The DLP projection display driving system with multiple laser light sources shown in fig. 1-3 has a signal processing and main controller, which is connected with a video decoding circuit, a DMD driving module, a fluorescent wheel driving module, a color wheel driving module, an optical temperature sensor module, a laser light source driving interface, a power management module, an android intelligent operating system module, and an audio processing and power amplifying module; the signal processing and main controller consists of a PMD1000 chip, a DAD2000 chip and a DDP4422 chip, wherein the DDP4422 chip is used as the main controller, the DAD2000 chip is responsible for resetting the DMD chip, and the PMD1000 chip provides working voltage and control signals of a fan device; the laser light source driving interface comprises RGB (red, green and blue) tricolor PWM (pulse width modulation) connected with the DDP4422 chip, the RGB tricolor PWM is connected with an RGB tricolor laser light source driver, and the RGB tricolor laser light source driver is connected with an RGB tricolor laser module to emit tricolor laser; the PMD1000 chip is respectively in signal connection with a laser light source driver, a fluorescent wheel and a color wheel, the laser light source driver is connected with a laser module, the laser module emits laser, fluorescent powder is arranged on the fluorescent wheel, the fluorescent wheel can be excited to emit fluorescent light with corresponding colors, the fluorescent powder and the color of the laser emitted by the laser are used for forming three primary colors together, and the three primary colors are used as a projection light source to provide illumination for the optical machine part; in operation, the video decoding module receives various video signals, converts the various video signals into video signals with a uniform format, and outputs the video signals to the signal processing and main control chip DDP4422, wherein the various video signals include: television signals, network video data, USB, HDMI and VGA video signals; selecting an AFE1000 of TI as a Video decoding chip on the signal support of composite Video, S-Video, component Video and modular VGA; the signal processing and main controller is used for controlling the operation of the whole display system and decoding and converting the video signals input into the display system, all the input signals enter the DDP4422 to be processed at the front end and then to be converted at the frame rate, so that the input signals are unified into one frame rate; then, the image quality is improved, the color is enhanced, and the tone is adjusted; the resolution of an input image is zoomed into the resolution of a DMD, the image format is converted into a format supporting the display of the DMD, and the image is finally optimized by utilizing technologies such as extreme color, dynamic black compensation and the like, so that a perfect projection effect is realized; the DMD driving module is used for receiving the data converted by the signal processing module for displaying, the data processed by the DDP4422 chip is transmitted to the DMD chip through LVDS, the deflection angle of each pixel micro lens is controlled by binary pulse width modulation, and light is reflected to a projection screen.
In operation, the video decoding module receives various video signals, converts the various video signals into video signals with a uniform format, and outputs the video signals to the signal processing and main control chip DDP4422, wherein the various video signals include: television signals, network video data, USB, HDMI and VGA video signals; wherein, the AFE1000 of TI is selected as a Video decoding chip on the signal support of composite Video, S-Video, component Video and modular VGA. For the video decoding of HDMI digital signals provided by the system, MST3366 or other video decoding chips are suggested.
The projection display driving system is designed by taking the signal processing and main controller DDP4422 as a core, and is used for controlling the operation of the whole display system and decoding and converting the video signals input into the display system. In this module, all input signals enter DDP4422 for front-end processing, such as chrominance space conversion, noise reduction, and interlaced-to-progressive conversion; then, performing frame rate conversion to unify the input signals into a frame rate; then, the image quality is improved, the color is enhanced, the tone is adjusted and the like; the resolution of the input image is scaled to the resolution of the DMD (the resolution is converted, processed and then OSD is superposed), the image format is converted into a format supporting the display of the DMD, and the image is finally optimized by utilizing technologies such as extreme color, dynamic black compensation and the like, so that a perfect projection effect is realized.
And the DMD driving module is used for receiving the data converted by the signal processing module and displaying the data. Specifically, the data processed by DDP4422 is transmitted to the DMD chip via LVDS, the deflection angle of each pixel micromirror is controlled by binary pulse width modulation, and the light is reflected onto the projection screen, and finally a vivid picture is formed in the eyes of the observer.
Fig. 2 is a block diagram of a system for driving RGB pure lasers, and a portion framed by dotted lines is designed for a projection display driving system supporting a plurality of laser light sources, and the periphery includes a DMD projection module, a projection optical module, a power board portion, a three-primary-color laser light source portion, and the like.
The RGB semiconductor laser is used as a light source, and three color lights emitted by the RGB semiconductor laser are converged and shaped to obtain uniform illuminating light. After entering the TIR prism, the light is reflected to enter the DMD chip, and after being modulated by the DMD chip, the light meeting the conditions is projected and imaged by the projection lens.
The DMD chip is an electro-optic conversion device, and the input video data signals control a large number of micromirrors in the DMD (digital micromirror device) to rotate through signal processing and a main control chip, thereby generating video optical images. The strong light output by the semiconductor laser module irradiates the DMD, a large number of micromirrors are arranged in the DMD, and each bit of data of a signal controls the rotation of a certain micromirror. The TI DLP chipset consists of a PMD1000, a DAD2000 and a DDP4422, wherein the DDP4422 is used as a main controller, the DAD2000 is responsible for resetting the DMD, and the PMD1000 provides working voltage and control signals of devices such as a fan and the like.
The driving control module of the three-primary-color laser light source comprises a red laser light source control unit, a green laser light source control unit and a blue laser light source control unit. Three-colour semiconductor laser module correspondingly includes: red, green and blue semiconductor lasers.
Fig. 3 is a block diagram of a system for driving a monochromatic or dichroic laser-excited fluorescent wheel, wherein the part enclosed by dotted lines is designed for a projection display driving system supporting a plurality of laser light sources, and the periphery of the projection display driving system comprises a DMD projection module, a projection optical module, a power panel part, a monochromatic or dichroic laser light source part, and the like.
A single-color or double-color semiconductor laser is used as a light source to excite fluorescent powder on a fluorescent wheel, RGB three-color light is separated through a color wheel, and uniform illuminating light is obtained after convergence and reshaping. After entering the TIR prism, the light is reflected to enter the DMD chip, and after being modulated by the DMD chip, the light meeting the conditions is projected and imaged by the projection lens.
The DMD chip is an electro-optic conversion device, and the input video data signals control a large number of micromirrors in the DMD (digital micromirror device) to rotate through signal processing and a main control chip, thereby generating video optical images. The strong light output by the semiconductor laser module irradiates the DMD, a large number of micromirrors are arranged in the DMD, and each bit of data of a signal controls the rotation of a certain micromirror. The TI DLP chip set is composed of a PMD1000, a DAD2000 and a DDP4422, wherein the DDP4422 is used as a main controller, the DAD2000 is responsible for resetting the DMD, and the PMD1000 provides working voltage, fluorescent wheels, color wheels, fans and other control signals.
In a light source module of a laser projector, a laser is usually included, and a fluorescent wheel is used as a wavelength conversion device. The laser can be a monochromatic laser or a bicolor laser, so as to emit laser of one or two colors, the fluorescent wheel is provided with fluorescent powder, the fluorescent powder can be excited to emit fluorescent light of corresponding color, the fluorescent powder and the color of the laser emitted by the laser form three primary colors together, and the three primary colors are used as a projection light source to provide illumination for the optical machine part.
Claims (1)
1. The DLP projection display driving system supporting various laser light sources is characterized in that: the system is provided with a signal processing and main controller, wherein the signal processing and main controller is connected with a video decoding circuit, a DMD chip driving module, a fluorescent wheel driving module, a color wheel driving module, a laser light source driving module, a power management module, an android intelligent operating system module and an audio processing and power amplification module;
the signal processing and main controller consists of a DDP4422 chip, a DAD2000 chip and a PMD1000 chip, wherein the DDP4422 chip is used as the main controller, the DAD2000 chip is responsible for resetting the DMD chip, and the PMD1000 chip provides the working voltage and control signals of the fan device;
the signal processing and main controller is used for controlling the operation of the whole driving display system and decoding and converting the video signals input into the system, all the input signals enter a DDP4422 chip to be subjected to front-end processing and frame rate conversion, and the input signals are unified into a frame rate; then, the image quality is improved and optimized, the resolution of an input image is zoomed into the resolution of a DMD chip, and the image format is converted into a format supporting the display of the DMD chip;
the laser light source driving module is divided into a three-primary-color laser light source driving module and a single-color or double-color laser light source driving module according to the difference of the external laser module;
the three-primary-color laser driving module comprises a red laser light source control unit, a green laser light source control unit and a blue laser light source control unit, the three-primary-color laser module comprises a red laser module, a green laser module and a blue laser module, and the three-primary-color laser driving module is used for driving the three-primary-color laser module to work; one end of the three-primary-color laser driving module is connected with the main controller, and the other end of the three-primary-color laser driving module is connected with the three-primary-color laser module;
the single-color or double-color laser light source driving module is used for driving the single-color or double-color laser module to emit laser of one or two colors, light of corresponding colors is excited by fluorescent powder of the fluorescent wheel, and the light and the laser emitted by the single-color or double-color laser module form three primary colors together to serve as a projection light source to provide illumination for the optical machine part; one end of the monochromatic or bicolor laser light source driving module is connected with the main controller through the PMD1000 chip, and the other end of the monochromatic or bicolor laser light source driving module is connected with the monochromatic or bicolor laser module;
the PMD1000 chip is connected differently according to different external laser modules; when the three-primary-color laser module is used, one PMD1000 chip is connected with the fan; when a monochromatic or bicolor laser module is used, two PMD1000 chips are used, one PMD1000 chip is connected with a monochromatic or bicolor laser light source driving module and is simultaneously connected with a fluorescent wheel and a fan, and the other PMD1000 chip is connected with a color wheel.
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| CN109634043B (en) * | 2019-02-22 | 2020-08-28 | 中国科学院福建物质结构研究所 | Laser emission unit and laser projection light source |
| CN110049264B (en) * | 2019-03-28 | 2021-06-11 | 深圳创维－Rgb电子有限公司 | Laser television power supply control system and method |
| CN113099197B (en) * | 2021-03-10 | 2022-07-26 | 山西汉威激光科技股份有限公司 | Dynamic black quick response laser projection control system |
| CN113518213B (en) * | 2021-04-16 | 2022-08-26 | 华东师范大学 | Real-time dynamic video display system based on 4k digital micromirror chip |
| CN114979593A (en) * | 2022-04-07 | 2022-08-30 | 华东师范大学 | Video display driving system based on novel high-speed 4K digital micromirror chip |
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Effective date of registration: 20181204 Address after: 473000 High-tech East Road, Wancheng District, Nanyang City, Henan Province Applicant after: Henan Honchoo Technology Limited Address before: 473000 Photoelectric Incubation Park F Block of Nanyang High-tech Zone, Henan Province Applicant before: Flower cat Display Technology Co. Ltd. |
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