WO2020108233A1 - 一种激光投影设备及激光投影方法 - Google Patents

一种激光投影设备及激光投影方法 Download PDF

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Publication number
WO2020108233A1
WO2020108233A1 PCT/CN2019/115328 CN2019115328W WO2020108233A1 WO 2020108233 A1 WO2020108233 A1 WO 2020108233A1 CN 2019115328 W CN2019115328 W CN 2019115328W WO 2020108233 A1 WO2020108233 A1 WO 2020108233A1
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Prior art keywords
color
laser
preset
colors
mixed
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PCT/CN2019/115328
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English (en)
French (fr)
Inventor
王振
李龙民
郭大勃
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Qingdao Hisense Laser Display Co Ltd
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Qingdao Hisense Laser Display Co Ltd
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Priority claimed from CN201811451427.8A external-priority patent/CN109283783A/zh
Priority claimed from CN201811456924.7A external-priority patent/CN109358468A/zh
Application filed by Qingdao Hisense Laser Display Co Ltd filed Critical Qingdao Hisense Laser Display Co Ltd
Publication of WO2020108233A1 publication Critical patent/WO2020108233A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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

Definitions

  • the invention relates to the technical field of laser projection, in particular to a laser projection device and a laser projection method.
  • Monochromatic light sources include lasers, fluorescent wheels, color filters, and other components. During projection, colors other than the laser primary color light can be stimulated by the fluorescent wheels, and the output is purified by the color wheels. It is generally called a fluorescent excitation scheme.
  • the light source needs to include a fluorescent wheel and a color filter wheel, and the operation needs to be matched with the circuit drive control, the color wheel needs to be effectively dissipated, and the necessary light path needs to be shaped and homogenized before the excitation light enters the fluorescent wheel, resulting in The complexity of the light source architecture of this scheme has increased.
  • an embodiment of the present application provides a laser projection device, including:
  • Laser light sources including red lasers, green lasers, and blue lasers, are used to output three primary lasers and mixed lasers according to a preset color sequence;
  • the opto-mechanical module is used to modulate the laser light of the preset color sequence according to the color ratio of the image to be displayed.
  • the embodiments of the present application provide a driving control method for a laser light source, including:
  • Start the diffusion wheel obtain a preset color sequence, which indicates the arrangement order of multiple colors in each cycle, and the output duration corresponding to each color of the multiple colors, the multiple colors including red , Green, and blue; determine that the synchronization flag in the diffusion wheel is located at the position corresponding to the preset color in the preset color sequence; and light the laser corresponding to the preset color according to the preset color sequence.
  • an embodiment of the present application provides a laser projection method, including:
  • Obtain a preset color sequence that indicates the arrangement order of multiple colors in each cycle and the output duration corresponding to each color of the multiple colors, the multiple colors including red, green, and blue Color and mixed color; when it is determined that the synchronization mark in the diffusion wheel is located at a position corresponding to the preset color in the preset color sequence, the red laser, the green laser, and the blue laser are lit according to the preset color sequence; then the diffusion wheel transmits A plurality of colors emitted according to the preset color sequence and enter the digital micromirror element DMD; the DMD modulates the lasers of the plurality of colors according to the driving signal corresponding to the image to be displayed.
  • FIG. 1 is a schematic diagram of a laser projection device provided by an embodiment of this application.
  • 2A is a schematic diagram of a timing sequence for a laser light source driving control circuit to turn on a laser light source according to an embodiment of the present application
  • FIG. 2B is a schematic timing diagram of another laser light source drive control circuit for lighting a laser light source provided by an embodiment of the present application;
  • 2C is a timing diagram of another laser light source driving control circuit for lighting a laser light source provided by an embodiment of the present application;
  • 3A is a schematic structural diagram of a diffusion wheel provided by an embodiment of the present application.
  • 3B is a schematic diagram of a planar structure of a diffusion wheel provided by an embodiment of this application.
  • 3C is a schematic diagram of a planar structure of a diffusion wheel provided by an embodiment of the present application.
  • 3D is a schematic diagram of a planar structure of a diffusion wheel provided by an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a laser light source drive control circuit provided by an embodiment of the present application.
  • FIG. 5 is a flowchart of a laser projection method provided by an embodiment of the present application.
  • FIG. 6 is a flowchart of a laser light source driving control method provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a synchronization of a diffusion wheel and a laser provided by an embodiment of this application;
  • each digital micro-reflective lens has its own independent drive device, which is used to support the digital micro-reflective lens to switch between the open state and the closed state.
  • the switching between the open and closed states of the digital micro-reflective lens is controlled by the displayed image.
  • the image information that is, the image information of the pixel corresponding to the digital micro-reflective lens determines the number of times the digital micro-reflective lens is switched between the on state and the off state, and the continuous retention time.
  • the light source outputs three primary colors of light beams in time sequence, and the output time of each primary color light beam in the three primary colors (red, green, blue) is very short, so although the three primary colors enter the human body at different time periods The eye, but due to the persistence of the human eye's vision, it is impossible to distinguish the color that enters the human eye in such a nuanced time, so it will form a colorful image from the perception.
  • FIG. 1 is a schematic diagram of a laser projection device according to an embodiment of the present application.
  • the laser projection device includes a laser light source 10 and an optical machine module 14.
  • the laser assembly 12 includes a red laser, a green laser, and a blue laser, which are used to output three primary color lasers and mixed color lasers according to a preset color sequence, where the three primary colors include red light, blue light, and green light, mixed
  • the color is a mixed color of at least two colors among red, blue, and green.
  • the preset color sequence is the arrangement order of multiple colors in each cycle, and the output duration of each color in the multiple colors.
  • the preset color sequence is configuration information that is pre-set before shipment to meet the white balance characteristics of the laser light source.
  • the four colors indicated by the preset color sequence are arranged in the order of red, blue, green, and mixed colors, and the corresponding durations are the first duration, the second duration, the third duration, and the fourth duration.
  • the red laser can be lit for the first duration
  • the green laser can be lit for the second duration
  • the blue laser dot can be lit according to the arrangement order of the four colors indicated by the preset color sequence Turning on the third duration and turning on the laser corresponding to all the colors of the mixed color turn on the fourth duration.
  • the cycle duration of each cycle is equal to the cumulative sum of the first duration, the second duration, the third duration, and the fourth duration.
  • the cumulative sum of the first duration, the second duration, the third duration, and the fourth duration is the duration required to display the image to be displayed.
  • the embodiment of the present application is not limited to which color is the mixed color.
  • the mixed color may be yellow or white, or cyan or purple, etc., which may be set according to actual conditions, and will not be repeated here.
  • the mixed color is yellow obtained by mixing red and green.
  • the order of colors in the preset color sequence is red, green, blue, and yellow
  • the corresponding durations are the first duration and the Second duration, third duration and fourth duration.
  • a period is 10ms
  • the first duration is 2ms
  • the second duration is 3ms
  • the third duration is 3ms
  • the fourth duration is 2ms.
  • the cumulative sum of the duration of lighting lasers is 12 ms, that is, the cumulative sum of the duration of lighting of all lasers is greater than the period duration of one cycle.
  • the brightness will be 1.2 compared to when there is no mixed color Times. Therefore, in the case of setting the mixed color, it is possible to greatly increase the brightness of the image during display in a short time.
  • the mixed color is a cyan color obtained by mixing blue and green, and in each cycle, the color sequence in the preset color sequence is red, green, blue, and cyan.
  • a period is 10 ms
  • the first duration is 3 ms
  • the second duration is 3 ms
  • the third duration is 2 ms
  • the fourth duration is 2 ms.
  • the cumulative sum of the duration of lighting lasers is 12 ms, that is, the cumulative sum of the duration of lighting of all lasers is greater than the period duration of one cycle.
  • the brightness will be 1.2 compared to when there is no mixed color Times. Therefore, in the case of setting the mixed color, it is possible to greatly increase the brightness of the image during display in a short time.
  • green when determining the mixed color, preferably, green can be selected as one of the determined primary colors of the mixed color, because green is brighter in human visual perception, so the mixed color is preferably It is yellow or cyan.
  • the mixed color is white obtained by mixing red, blue, and green.
  • the color sequence in the preset color sequence is red, green, blue, and cyan.
  • a period is 10 ms
  • the first duration is 2 ms
  • the second duration is 3 ms
  • the third duration is 2 ms
  • the fourth duration is 3 ms.
  • the schematic diagram of the laser lighting can refer to FIG. 2C.
  • the red laser is turned on for 2ms
  • the blue laser for 2ms
  • the red laser, blue laser, and green laser are turned on simultaneously for 3ms.
  • the cumulative sum of the duration of lighting the laser is 13ms.
  • the brightness will be 1.3 compared to when there is no mixed color Times. Other cases are not explained one by one.
  • the brightness when displaying the image can be significantly increased, and the mixed color is white as an example for description.
  • the duty ratio of red, green, and blue and the corresponding lighting time of the laser are shown in Table 1.
  • the cycle duration of one cycle is 10 ms
  • the red laser lighting duration is 2 ms
  • the green laser lighting duration is 3 ms
  • the blue laser lighting duration is 5 ms.
  • the load ratio of white is 10%
  • the duty ratio of red, green, blue and white is shown in Table 2.
  • the lighting time of each laser in a cycle is 1.2 times that of the unset mixed color, and the theoretical brightness Relative to no mixed colors, there will be a 1.2-fold improvement.
  • the image to be displayed needs to be decomposed into multiple primary color components, that is, an image is composed of multiple primary colors, usually at least three primary colors of red, green and blue composition.
  • the DMD chip modulates the incident light beam of a certain primary color according to the image driving signal, and forms a frame on the projection medium by superimposing the multiple primary color component screens.
  • the laser light source provided by the embodiment of the present application lights the laser by arranging the four colors indicated in the preset color sequence in each cycle. Since the four colors include mixed colors, the mixed colors correspond to at least two lasers , Which means that in a cycle, when the laser corresponding to the mixed color is lit, at least two lasers are lit. Compared with the traditional three primary color timing output, only one laser is lit at a time, which can significantly increase the laser projection screen. Brightness
  • the laser light source includes a diffusion wheel 13, which is provided with a synchronization mark, which is used to indicate the starting position of the preset color in the preset color sequence; Any of the colors.
  • the specific implementation manner of the synchronization flag is not limited.
  • a black label can be attached to the diffusion wheel, and the black label can be used as a synchronization mark.
  • the diffusion wheel can be divided into multiple virtual areas, for example, the multiple colors indicated by the preset color sequence and the arrangement order are red, green, blue, and mixed colors, and the synchronization flag indicates the red
  • the virtual areas in the diffusion wheel are the areas corresponding to red, green, blue and mixed colors.
  • the rotation of the diffusion wheel can be matched with the laser light emission and DMD control.
  • the laser light source is notified to emit a red laser beam, that is, the arrival time of the synchronization mark measured in the software needs to correspond to the color start time required in the DMD work sequence, and the current The synchronization mark needs to be located where the laser beam is irradiated.
  • FIG. 3A is a schematic structural diagram of a diffusion wheel provided by an embodiment of the present application.
  • the diffusion wheel adopts a two-layer coaxial diffusion wheel structure.
  • the red laser has the largest influence on the speckle
  • the blue laser and the green laser have less influence on the speckle effect.
  • the laser will lose part of the brightness through the diffuser area of the diffusion wheel. This non-differentiated diffusion effect will cause the blue-green laser to lose Too big.
  • the diffusion wheel needs to be partitioned.
  • the red laser speckle is more serious.
  • the sector corresponding to the red laser can be superimposed and coaxially rotated by two diffusers; the blue-green laser speckle is relatively light, and a diffuser can be used even without a diffuser.
  • Counterweight this can not only meet the rotation dissipation spot of the red laser, but also reduce the brightness loss of the blue and green lasers caused by the diffusion wheel.
  • FIG. 3C is a schematic diagram of the division of the diffusion wheel 1 in FIG. 3B
  • FIG. 3D is a schematic diagram of the division of the diffusion wheel 2 in FIG. 3B.
  • the same-color divisions in FIGS. 3C and 3D correspond to overlap, they correspond to the corresponding colors in FIG. 3B. Partition.
  • the software can control the two diffusion wheels to rotate to the corresponding zone position.
  • a sensor is provided on the diffusion wheel.
  • the sensor is perpendicular to the direction of the cutting plane on the upper side of the diffusion wheel.
  • the black label When the black label is turned to this cutting plane, it can be detected by the sensor.
  • the diffusion wheel drives the black label to rotate, when the black label rotates to the position facing the sensor, the sensor outputs a high-level signal due to the detection of the black label.
  • the sensor When the diffusion wheel rotates to another position, the sensor does not detect the black label. Output low level signal.
  • the sensor will also periodically output high-level signals and low-level signals. Specifically, the sensor is used to detect the position of the red diffuser.
  • the sensor scans the black mark of the diffusion wheel, it returns to a high level, and the duration of the high level corresponds to the angle of the red sector.
  • the system adjusts the position of the diffusion wheel according to the position of the high level relative to the red laser signal until each section of the diffusion wheel corresponds to the corresponding laser color.
  • the rotation of the motor is adjusted by software control to control the matching of the red laser signal and the feedback signal of the flag bit, so as to realize the correspondence between each division of the diffusion wheel and the corresponding primary laser.
  • the laser corresponding to each color will be turned on in sequence according to the order indicated by the preset color segment.
  • the laser light output by the diffusion wheel according to the preset color sequence is incident on the DMD.
  • DLP Digital Light Processing, digital light processor
  • the diffusion wheel provided by the embodiment of the present application matches the preset color sequence laser light output by the laser light source by setting a synchronization mark, and at the same time guarantees that the diffusion wheel rotates at a certain speed through correspondence between the synchronization mark and the preset color in the preset color sequence To rotate.
  • the diffusion wheel has different zones corresponding to different color output areas, and different zones can have different diffusion angles, so that different colors of laser beams can be diffused to different degrees, according to different colors of the human eye.
  • Different sensitivity levels of the laser to increase the consistency of the effect of dispersing speckle on the picture.
  • the diffusion wheel is provided with a red laser transmission area, a blue laser transmission area, a green laser transmission area, and a mixed color transmission area.
  • the mixed color may preferably be yellow, that is, a mixed color of red laser and green laser
  • the diffusion angle of the mixed color transmission area is the largest, followed by the red laser transmission area, the green laser transmission area, and the blue laser transmission area.
  • the diffusion angle can be relatively minimum.
  • the diffusion wheel is regarded as a color wheel component for control and driving, which can be controlled by the current monochromatic laser light source or dual-color laser light source software
  • the software control of the light source is almost unchanged, and the new three-color light source type control can be achieved.
  • the laser can dispel the speckle, the development cost, the development cycle and the light source can be greatly reduced.
  • the driving scheme is versatile for monochromatic laser light sources, two-color laser light sources, and three-color laser light sources, while providing high-quality projection light source illumination.
  • the optomechanical module includes a light valve, which is a digital micromirror device (DMD), which is used to modulate the input laser of the preset color sequence based on the color ratio of the image to be displayed .
  • DMD digital micromirror device
  • the preset color components of the image to be displayed are analyzed to obtain the proportion of each color in the preset colors.
  • the DMD when it is necessary to display light of a primary color, that is, when the red laser, the blue laser, or the green laser is individually lit, the DMD reflects the light of the primary color to the projection lens by adjusting the rotation of the micro-lens, thereby Through the projection lens, the light of the primary color is projected onto the screen; when there is no need to display the light of a primary color, the DMD reflects the light of the primary color to the light absorber by adjusting the rotation of the micro lens, so that the light of the target color is reflected by the light Absorber absorbs.
  • the DMD when a mixed color needs to be displayed, if the mixed color ratio in the image to be displayed is greater than a preset ratio, the DMD modulates the mixed color according to the laser output from the laser corresponding to the currently lit mixed color, And output the mixed color after modulation; if the ratio of the mixed color in the image to be displayed is less than or equal to the preset ratio, the DMD modulates the laser of the desired color according to the color required to synthesize the mixed color and outputs it, or by adjusting the digital micromirror element Turns off the mixed color.
  • the sensor of the diffusion wheel detects the arrival time of the current synchronization mark, and according to the starting time of which color the synchronization mark should correspond to, turns on the laser of the corresponding preset color and emits Corresponding color laser beam.
  • the method further includes:
  • the lasers of other colors are sequentially turned on according to the preset color sequence, or, when the preset color sequence includes mixed colors, the lasers of at least two colors corresponding to the mixed colors are turned on according to the preset color sequence.
  • Adjust the rotation speed cycle of the diffusion wheel to the working sequence of the DMD that is, the time period of displaying a picture is the same or a multiple relationship, so that at least one primary color component is displayed or diffused during the display of a picture
  • the wheel can make one revolution. Then notify the DMD to start working according to the time when the synchronization mark arrives, and the color component parameters required by the DMD at this time are notified to the system software, and the system software sets the synchronization mark to match the color component at this time.
  • the diffusion wheel when the diffusion wheel rotates, it rotates at a constant speed, and the duration of one rotation of the diffusion wheel is equal to the sum of the output durations corresponding to each color of the multiple primary colors in each cycle.
  • the preset timing includes four colors, such as red, green, blue, and mixed colors.
  • the corresponding output duration of the laser emitting the corresponding color is the first duration, the second duration, the third duration, and the fourth duration, respectively.
  • the duration of one revolution of the wheel is equal to the cumulative sum of the first duration, the second duration, the third duration, and the fourth duration.
  • the laser projection device includes a drive control module 11, which can drive the implementation of the hardware circuit of the laser projection device described above, including controlling the lighting of the laser assembly and the rotation of the diffusion wheel.
  • a drive control module 11 which can drive the implementation of the hardware circuit of the laser projection device described above, including controlling the lighting of the laser assembly and the rotation of the diffusion wheel.
  • the details are shown in Figure 4.
  • R_EN, G_EN, B_EN, and Y_EN are used to control R_PWM, G_PWM, B_PWM, and Y_PWM through the gating chip, respectively, and then the blue laser is driven.
  • the difference from the previous monochrome drive is that one pin of Laser_sele of the DLP control chip selects one of R_EN, G_EN, B_EN, and Y_EN.
  • R_EN, G_EN, B_EN to control R_PWM, G_PWM, B_PWM, and use R_PWM, G_PWM, B_PWM to drive the corresponding control chips of red laser, green laser and blue laser respectively, so as to control the lighting of red laser, green Laser and blue laser.
  • the driver part is also a choice of R_EN, G_EN, B_EN, Y_EN through the Laser_sele pin of the DLP control chip to ensure that there is only one system in the same system (monochrome or tri-color).
  • the drive module can switch the system between monochrome and tri-color only by simply configuring the software without changing the hardware, which will not be repeated here.
  • FIG. 5 is a schematic flowchart of a laser projection method provided by an embodiment of the present application. As shown in Figure 5, it includes:
  • Step 501 Obtain the preset color sequence
  • the preset color sequence indicates the arrangement order of multiple colors in each cycle, and the output duration corresponding to each color of the multiple colors.
  • the multiple colors include red, green, blue, and mixed colors.
  • the mixed color is a color obtained by mixing at least two colors among red, green, and blue.
  • Step 502 Start the diffusion wheel and detect the position of the synchronization flag in the diffusion wheel.
  • the diffusion wheel rotates, it rotates at a constant speed, and the duration of one revolution is equal to the sum of the output durations of the lasers corresponding to the four colors indicated by the preset color sequence.
  • the corresponding laser output duration is the first duration, the second duration, the third duration, and the fourth duration
  • the duration of one revolution of the diffusion wheel is equal to the first duration , The second duration, the third duration and the cumulative duration of the fourth duration.
  • the synchronization mark is a black label, which is attached to the diffusion wheel and can rotate with the diffusion wheel.
  • the laser light source provided by the embodiment of the present application includes a sensor, which is perpendicular to the direction of the cut plane on the upper side of the diffusion wheel, and can be detected by the sensor when the black label turns to this cut plane.
  • the synchronization mark indicates the starting position of the preset color in the preset color sequence, therefore, before the projection, the synchronization mark in the diffusion wheel needs to be adjusted to the preset color sequence The position where the preset colors match.
  • Step 503 Determine whether the position of the synchronization flag in the diffusion wheel is at a position that matches the preset color in the preset color sequence; if yes, go to step 505, otherwise go to step 504.
  • the preset color sequence indicates that the arrangement order of the four colors is red, green, blue, and mixed colors
  • the synchronization flag indicates the starting position of red in the preset color sequence.
  • the synchronization mark in the diffusion wheel should be aligned with the red laser.
  • the synchronization mark is located at a position that matches red, otherwise it does not match.
  • the laser can be started according to a preset color sequence, and the diffusion wheel can be selected synchronously.
  • Step 504 Adjust the position of the synchronization flag in the diffusion wheel, and return to step 502.
  • the diffusion wheel may be rotated by a preset angle according to a preset rotation direction, and of course, there may be other ways, which will not be repeated here.
  • Step 505 Turn on the red laser, green laser, and blue laser according to the preset color sequence
  • Step 506 The diffusion wheel transmits a plurality of primary colors that are emitted according to the preset color sequence and enters the DMD.
  • Step 507 The DMD modulates multiple primary colors according to the driving signal corresponding to the image to be displayed.
  • DLP Digital Light Processing, digital light processor
  • DMD digital micromirror device
  • step 507 you can go to step 505 to display the next frame of image.
  • the laser projection display method provided in the above embodiment is applied to a three-color laser light source device, and in each cycle, the laser is lit according to the arrangement order of the four colors indicated by the preset color sequence, because the four colors include mixed colors ,
  • the mixed color corresponds to at least two lasers, which means that in a cycle, when the laser corresponding to the mixed color is lit, at least two lasers are lit.
  • only one laser is lit at a time It can significantly increase the brightness of the screen during laser projection.
  • the DMD chip it can selectively output mixed colors according to the image to be displayed. While enhancing the brightness of the image, it can also improve the color performance of the image screen.
  • FIG. 6 is a schematic flowchart of a method for driving and controlling a laser light source according to an embodiment of the present application. As shown in Figure 6, it includes:
  • Step S601 Start the diffusion wheel.
  • Step 602 Obtain a preset color sequence indicating the arrangement order of multiple primary colors in each cycle, and the output duration corresponding to each color among the multiple primary colors, the multiple primary colors including at least red and green ,blue.
  • Step S603 Determine that the diffusion wheel synchronization flag is located at a position corresponding to a preset color in the preset color sequence.
  • Step S604 Light up the laser corresponding to the preset color according to the preset color sequence.
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer usable program code.
  • These computer program instructions may also be stored in a computer-readable memory that can guide a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, the instructions
  • the device implements the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and/or block diagrams.

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Abstract

一种激光投影设备，包括：激光光源（10），包括红色激光器、绿色激光器以及蓝色激光器，用于根据预设色序输出三基色激光和混合色激光；以及光机模块（14），用于根据待显示图像的颜色比例对输入的预设色序的激光进行调制。

Description

一种激光投影设备及激光投影方法
本申请要求于2018年11月30日提交中国专利局、申请号为2201811451427.8，申请名称为“一种激光投影方法及装置”的中国专利申请以及2018年11月30日提交中国专利局、申请号为201811456924.7，申请名称为“一种激光光源驱动控制方法及激光投影显示方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及激光投影技术领域，尤其涉及一种激光投影设备及激光投影方法。
背景技术
现有的激光投影系统，可以通过单色激光器激发荧光色轮来产生多基色，形成混合白光。单色光源包括激光器，荧光轮、滤色轮等部件，在投影时，除激光器基色光之外的颜色可以通过荧光轮受激产生，并通过滤色轮提纯输出，一般称为荧光激发方案。对于荧光激发方案，由于光源需要包括荧光轮，滤色轮，运行需要配合电路驱动控制，需要对色轮进行有效散热，以及激发光在入射至荧光轮之前需要必需的光路进行整形匀化，导致该方案光源架构的复杂度上升，同时，更为明显的一个问题是，由于荧光转换效率受到激发功率和热效应的影响，导致无法达到更高的流明数，因此目前荧光激发的光源方案较难满足更高亮度的需求。而且即便荧光经过滤色后，其颜色的纯度也无法与 同种颜色的激光纯度相比。综上，荧光激发的光源输出光束的色域范围和颜色表现力都不如激光光源。
发明内容
一方面，本申请实施例提供了一种激光投影设备，包括：
激光光源，包括红色激光器、绿色激光器以及蓝色激光器，用于根据预设色序输出三基色激光和混合色激光；
光机模块，用于根据待显示图像的颜色比例对输入的预设色序的激光进行调制。
另一方面，本申请实施例提供了一种激光光源的驱动控制方法，包括：
启动扩散轮；获取预设色序，所述预设色序指示每个周期中多个颜色的排列顺序，以及所述多个颜色中每种颜色对应的输出时长，所述多个颜色包括红色、绿色、蓝色；确定扩散轮中同步标志位于所述预设色序中预设颜色对应的位置；按照所述预设色序点亮预设颜色对应的激光器。
再一方面，本申请实施例提供一种激光投影方法，包括：
获取预设色序，所述预设色序指示每个周期中多个颜色的排列顺序，以及所述多个颜色中每种颜色对应的输出时长，所述多个颜色包括红色、绿色、蓝色以及混合色；确定扩散轮中同步标志位于所述预设色序中预设颜色对应的位置时，按照所述预设色序点亮红色激光器、绿色激光器以及蓝色激光器；之后扩散轮透射按照所述预设色序出射的多个颜色，并入射至数字微镜元件DMD；DMD根据待显示图像对 应的驱动信号对所述多个颜色的激光进行调制。
附图说明
图1为本申请实施例提供的一种激光投影设备示意图；
图2A为本申请实施例提供的一种激光光源驱动控制电路点亮激光光源的时序示意图；
图2B为本申请实施例提供的另一种激光光源驱动控制电路点亮激光光源的时序示意图；
图2C为本申请实施例提供的另一种激光光源驱动控制电路点亮激光光源的时序示意图；
图3A为本申请实施例提供的一种扩散轮结构示意图；
图3B为本申请实施例提供的一种扩散轮平面结构示意图；
图3C为本申请实施例提供的一种扩散轮平面结构示意图；
图3D为本申请实施例提供的一种扩散轮平面结构示意图；
图4为本申请实施例提供的一种激光光源驱动控制电路结构示意图。
图5为本申请实施例提供的一种激光投影方法流程图；
图6为本申请实施例提供的激光光源驱动控制方法流程图；
图7为本申请实施例提供的一种扩散轮与激光器同步示意图；
具体实施方式
为了更好的理解上述技术方案，下面将结合说明书附图及具体的实施方式对上述技术方案进行详细的说明，应当理解本申请实施例以及实施例中的具体特征是对本申请技术方案的详细的说明，而不是对本申请技术方案的限定，在不冲突的情况下，本申请实施例以及实施例中的技术特征可以相互结合。
在进行本申请相关实施例说明之前，为便于理解对DLP投影的基本原理进行介绍。
DLP(Digital Light Procession，数字光处理)投影设备根据内部所配置的由若干个数字微反射镜片所构成的光阀(又称为DMD，Digital Micro-mirror Device数字微镜器件)对光源所输出的光束进行反射，从而进行图像的投影显示。在光阀上，每个数字微反射镜片都有各自独立的驱动装置，用来支持数字微反射镜片在开状态和关状态之间进行转动切换
在进行投影显示时，如图1所示，当数字微反射镜片转动到开状态即正偏转角度时，光源所输出的光束经过数字微反射镜片反射后进入镜头，进行成像显示；当数字微反射镜片转动到关状态即负偏转角度时，光源所输出的光束经过数字微反射镜片反射后未进入镜头而是进入光吸收单元或者被阻挡。通常光阀的分辨率决定了图像的分辨率，可简单理解为一个数字微反射镜片对应于图像中一个像素，数字微反射镜片在开状态和关状态之间的切换受控于所显示图像的图像信息，即数字微反射镜片所对应像素的图像信息决定了该数字微反射镜片在开状态、关状态的切换次数、持续保持时间。以显示一种基色分量画面为例，根据基色分量图像信息，经过这多次开关状态的叠加效果，对光束形成不同灰阶、亮度的图像，多种基色的图像最终形成一幅彩色的图像。由于在DLP投影设备中，光源是时序性输出三基色光束的，每次输出三基色(红、绿、蓝)中每种基色光束的时间非常短，所以尽管三基色是在不同时间段进入人眼，但是由于人眼的视觉暂留效应，无法分辨如此细微差别时间内进入人眼的颜色，所以从感觉上来说便会形成色彩丰富的图像。
本申请一个或多个实施例提供了一种激光投影设备，图1为本申 请实施例提供的一种激光投影设备示意图，如图1所示，该激光投影设备包括激光光源10、光机模块14、驱动控制模块11，其中：光源包括激光器组件12，扩散轮13。
在一种实施方式中，激光器组件12包括红色激光器、绿色激光器以及蓝色激光器，用于根据预设色序输出三基色激光和混合色激光，其中三基色包括红光、蓝光和绿光，混合色为红色、蓝色、绿色中的至少两种颜色混合后的颜色。
其中，预设色序为在每个周期中多种颜色的排列顺序，以及该多种颜色中每种颜色的输出时长。该预设色序为出厂前预先设置好的满足激光光源白平衡特性的配置信息。
在一种实施方式中，该预设色序指示的四种颜色排列顺序为红色、蓝色、绿色、混合色，对应的时长分别为第一时长、第二时长、第三时长以及第四时长。在每个周期中，可以按照该预设色序指示的四种颜色的排列顺序，将该红色激光器点亮该第一时长、将该绿色激光器点亮该第二时长、将该蓝色激光器点亮该第三时长以及将混合出该混合色的所有颜色所对应的激光器点亮该第四时长。
需要说明的是，每个周期的周期时长，等于第一时长、第二时长、第三时长以及第四时长的累加和。第一时长、第二时长、第三时长以及第四时长的累加和，也就是显示该待显示图像所需的时长。本申请实施例对混合色具体是哪一种颜色并不限定，混合色可以为为黄色或者白色或者青色或者紫色等，具体可以根据实际情况设置，在此不再赘述。
举例来说，混合色为由红色和绿色混合获得的黄色，每个周期中，预设色序中颜色的排列顺序为红色、绿色、蓝色以及黄色，对应的时长分别为第一时长、第二时长、第三时长以及第四时长。假设一个周 期为10ms，第一时长为2ms，第二时长为3ms，第三时长为3ms，第四时长为2ms。当点亮激光器时，激光器的点亮示意图可以参考图5A所示。图2A中，依次点亮红色激光器2ms、绿色激光器3ms、蓝色激光器3ms，最后同时点亮红色激光器和绿色激光器2ms。在一个10ms的周期中，点亮激光器的时长的累加和为12ms，即所有激光器的点亮时长的累加和大于一个周期的周期时长。结合上面的描述，在设置混合色的情况下，每个激光器在一个周期的点亮时间是未设置混合色的12/10＝1.2倍，理论上亮度相对于无混合色时，将会有1.2倍的提升。因此在设置混合色的情况下，可以实现在较短时间内，大幅提高图像在显示时的亮度。
再举例来说，混合色为由蓝色和绿色混合获得的青色，每个周期中，预设色序中颜色的排列顺序为红色、绿色、蓝色以及青色。假设一个周期为10ms，第一时长为3ms，第二时长为3ms，第三时长为2ms，第四时长为2ms。当点亮激光器时，激光器的点亮示意图可以参考图2B所示。图2B中，依次点亮红色激光器3ms、绿色激光器3ms、蓝色激光器2ms，最后同时点亮蓝色激光器和绿色激光器2ms。在一个10ms的周期中，点亮激光器的时长的累加和为12ms，即所有激光器的点亮时长的累加和大于一个周期的周期时长。结合上面的描述，在设置混合色的情况下，每个激光器在一个周期的点亮时间是未设置混合色的12/10＝1.2倍，理论上亮度相对于无混合色时，将会有1.2倍的提升。因此在设置混合色的情况下，可以实现在较短时间内，大幅提高图像在显示时的亮度。
需要说明的是，本申请实施例中，在进行混合色确定时，优选地，可以选择绿色为混合色的确定基色之一，因为绿色在人眼视觉感知中较亮，因此混合色优选的可以是黄色或青色。
再举例来说，混合色为由红色、蓝色和绿色混合获得的白色，每个周期中，预设色序中颜色的排列顺序为红色、绿色、蓝色以及青色。假设一个周期为10ms，第一时长为2ms，第二时长为3ms，第三时长为2ms，第四时长为3ms。当点亮激光器时，激光器的点亮示意图可以参考图2C所示。图2C中，依次点亮红色激光器2ms、绿色激光器3ms、蓝色激光器2ms，最后同时点亮红色激光器、蓝色激光器和绿色激光器3ms。在一个10ms的周期中，点亮激光器的时长的累加和为13ms。结合上面的描述，在设置混合色的情况下，每个激光器在一个周期的点亮时间是未设置混合色的13/10＝1.3倍，理论上亮度相对于无混合色时，将会有1.3倍的提升。其它情况不在逐一举例说明。
本申请实施例中，通过针对混合色对应的激光器设置不同的点亮时长，可以明显增加显示图像时的亮度，以混合色为白色为例进行说明。假设一个周期为10ms，现有技术中，不增加混合色的情况下，红色、绿色、蓝色的负载(duty)比例以及对应的激光器的点亮时长(time)如表1所示。
表1
Figure PCTCN2019115328-appb-000001
此时，一个周期的周期时长是10ms，红色激光器的点亮时长为2ms；绿色激光器的点亮时长为3ms；蓝色激光器的点亮时长为5ms。
现在不改变白平衡及色坐标的前提下，增加白色的混合色，白色的负载比例为10％，此时红色、绿色、蓝色以及白色的负载(duty)比例以及对应的激光器的点亮时长(time)如表2所示。
表2
Figure PCTCN2019115328-appb-000002
此时，一个周期的周期时长还是10ms，红色激光器的点亮时长为1.4+1＝2.4ms；绿色激光器的点亮时长为2.6+1＝3.6ms；蓝色激光器的点亮时长为5+1＝6ms。在一个周期中，保证R:G:B＝2：3：5的前提下，设置混合色的情况下，每个激光器在一个周期的点亮时间是未设置混合色的1.2倍，理论上亮度相对于无混合色时，将会有1.2倍的提升。
根据前述DLP投影基本原理的相关介绍，为了形成一幅待显示图像，需要将待显示图像分解形成多基色分量，即一幅图像是由多种基色组成，通常至少由红，绿，蓝三基色组成。DMD芯片根据图像驱动信号对入射的某一种基色的光束进行调制，通过多基色分量画面的叠加在投影介质上形成一幅画面。
本申请实施例提供的激光光源，在每个周期中，通过按照预设色序指示出的四种颜色的排列顺序点亮激光器，由于四种颜色中包括混合色，混合色对应至少两个激光器，意味着在一个周期内，在点亮混 合色对应的激光器时，点亮至少两个激光器，相对于传统三基色时序性的输出，每次只点亮一个激光器，可以显著增加激光投影时画面的亮度
在一种实施方式中，激光光源包括扩散轮13，该扩散轮上设置有同步标志，该同步标志用于指示预设颜色在预设色序中的起始位置；其中预设颜色为上述多种颜色中的任一种颜色。
本申请实施例中，对同步标志的具体实现方式并不限定。举例来说，如图3B-3D所示，可以在扩散轮上贴上一黑色标签，将黑色标签作为同步标志。另外如图3B-3D所示，扩散轮可以划分为多个虚拟的区域，例如预设色序指示的多种颜色及排列顺序为红色、绿色、蓝色以及混合色，同步标志指示出红色的起始位置，那么扩散轮中虚拟的区域分别为红色、绿色、蓝色以及混合色对应的区域。
通过设置同步标志，可以实现扩散轮的旋转与激光器的发光以及DMD控制的匹配。具体的，当DMD工作时序中需要红色基色分量时，则通知激光光源发出红色激光光束，即软件中测得同步标志的到来时刻需要与DMD工作时序中所需的颜色起始时刻对应，且当前同步标志需要位于激光光束照射的位置。
在本申请的实施例中，图3A为本申请实施例提供的扩散轮结构示意图，如图3A所示，该扩散轮采用两层同轴扩散轮结构。具体的，对于三色激光投影，对散斑影响最大的为红色激光，蓝色激光和绿色激光对散斑效果影响较小。但是采用单一扩散轮在旋转过程中对红、绿、蓝激光器处理起来并没有差异化，激光通过扩散轮的扩散片区域会损失部分亮度，这种无差异化的扩散效果会使得蓝绿激光损失太大。为了实现对各个激光扩散效果的差异处理，需对扩散轮进行分区处理。例如红色激光散斑比较严重与红色激光对应的扇区可采用两块扩散 片叠加同轴旋转；蓝绿激光散斑比较轻，可以采用一片扩散片甚至不用扩散片，采用透明的玻璃进行轮子的配重；这样既可以满足红色激光的旋转消散斑，还可以减少蓝绿激光因为经过扩散轮导致的亮度损失。示例性的，图3C为图3B中扩散轮1的分区示意图，图3D为图3B中扩散轮2的分区示意图，当图3C和3D中相同颜色分区对应重叠时，对应图3B中相应颜色的分区。当相应色段激光器点亮时，软件可控制两扩散轮转到相应的分区位置。
在本申请的实施方式中，扩散轮上设置有传感器。传感器垂直于扩散轮上侧切平面方向，在黑色标签转到此切平面处时可以被传感器探测到。当扩散轮带动黑色标签旋转，当黑色标签旋转于正对传感器的位置时，传感器由于检测到黑色标签而输出高电平信号，当扩散轮转动到其他位置时，传感器由于未检测到黑色标签而输出低电平信号。当扩散轮持续转动时，传感器也会周期性输出高电平信号和低电平信号。具体的，该传感器用于检测红色扩散片的位置，当传感器扫过扩散轮黑色标志位时，会返回一个高电平，高电平的持续时间对应红色扇区的角度。系统根据高电平相对于红色激光信号的位置对扩散轮的位置进行调整，直至扩散轮各分区与相应的激光颜色对应。简言之，通过软件控制调整马达的转动从而控制红色激光信号与标志位反馈信号匹配，从而实现扩散轮各分区与相应基色激光的对应。
本申请实施例中，在实现激光与扩散轮的同步后，将根据预设色段指示的顺序依次点亮每种颜色对应的激光器。扩散轮按照预设色序输出的激光入射至DMD。DLP(Digital Light Processing，数字光处理器)将视频信号解码为数字微镜元件(Digital Micromirror Device，DMD)能识别的图像信号，根据每一帧图像中实际色彩值决定DMD在四种 颜色对应的激光照射在DMD上时，是否将激光反射出去，具体过程不再赘述。
本申请实施例提供的扩散轮，通过设置同步标志，实现与激光光源输出的预设色序激光的匹配，同时通过同步标志与预设色序中预设颜色的对应保证扩散轮按照一定的转速进行旋转。
在一种实施例中，扩散轮对应不同的颜色输出区域具有不同的分区，不同的分区可以具有不同的扩散角度，从而可以对不同颜色的激光光束进行不同程度的扩散，根据人眼对不同颜色激光不同的敏感程度，来增加画面消散斑效果的一致性。比如如图3B所示，扩散轮设置有红色激光透射区，蓝色激光透射区，绿色激光透射区，以及混合色透射区，混合色优选地可以为黄色，即红色激光和绿色激光的混合色，在设置扩散角度时，混合色透射区的扩散角度最大，其次可以为红色激光透射区，绿色激光透射区，蓝色激光器透射区的扩散角度可以相对最小。
在三色激光光源中，通过将扩散轮与预设色序中预设颜色进行匹配同步，将扩散轮视为一个色轮部件进行控制驱动，可以在当前单色激光光源或双色激光光源软件控制方案的基础上，对光源的软件控制几乎不进行改动，就可以实现新的三色光源类型的控制，在能够对激光进行消散斑的同时，可以大大降低开发成本、缩短开发周期，提高了光源驱动方案对单色激光光源、双色激光光源以及三色激光光源的通用性，同时提供了高质量的投影光源照明。
在一种实施方式中，光机模块中包含光阀，光阀为数字微镜元件(Digital Micromirror Device，DMD)，用于基于待显示图像的颜色比例对输入的预设色序的激光进行调制。
具体的，以预设颜色分量为红色、蓝色、绿色为例进行说明，对待显示图像的预设颜色分量进行分析，获取预设颜色中各颜色的占比。在一种实施方式中，在需要显示一种基色的光时，即红色激光器或蓝色激光器或绿色激光器单独点亮时，DMD通过调节微镜片的转动将该基色的光反射到投影透镜，从而通过投影透镜将该基色的光投影到屏幕上；在不需要显示一种基色的光时，DMD通过调节微镜片的转动将该基色的光反射到光吸收器，从而使得目标颜色的光被光吸收器吸收。在另一种实施方式中，在需要显示混合色时，如果该待显示图像中混合色比例大于预设比例时，DMD根据当前点亮的混合色对应的激光器输出的激光调制所述混合色，并输出调制后的混合色；如果待显示图像中混合色比例小于或等于预设比例，DMD根据合成混合色所需的颜色调制该所需的颜色的激光并输出，或者通过调整数字微镜元件的转动关闭该混合色。
在一种实施方式中，根据DMD工作时序，扩散轮的传感器检测当前同步标志的到达时刻，并根据该同步标志应对应哪种颜色的起始时刻，将对应的预设颜色的激光器打开，发出对应颜色的激光光束。
以及，按照所述预设色序点亮预设颜色对应的激光器之后，还包括：
按照预设色序点亮依次其他颜色的激光器，或者，当预设色序包括混合色时，按照预设色序点亮混合色对应的至少两种颜色的激光器。
将扩散轮的转速周期调整至与DMD的工作时序，即显示一幅画面的时间周期相同或者成倍数关系，使得至少显示一幅基色分量的时 间内，或者在显示一幅画面的时间内，扩散轮能够旋转一周。然后根据同步标志到达的时刻通知DMD开始工作，DMD此时需要的颜色分量参数通知给系统软件，系统软件设定此时同步标志与该颜色分量进行匹配。
或者，根据此时DMD工作时序需要的颜色光束，调整转速，使得扩散轮同步标志到达当前颜色激光器的发光位置，并稳定扩散轮转速，使匀速旋转。
在具体实施中，扩散轮旋转时，按照匀速旋转，扩散轮旋转一周的时长等于每个周期中多个基色中每种颜色对应的输出时长之和。以预设时序包括四种颜色，比如红色、绿色、蓝色以及混合色，对应的发出对应颜色的激光器的输出时长分别为第一时长、第二时长、第三时长以及第四时长，则扩散轮旋转一周的时长等于第一时长、第二时长、第三时长以及第四时长的累加和。
在一种实施方式中，激光投影设备包括驱动控制模块11，该模块可以驱动上述激光投影设备的硬件电路的实现，包括控制激光器组件的点亮、扩散轮的旋转。具体如图4所示。在单色驱动部分中，通过选通芯片用R_EN、G_EN、B_EN、Y_EN分别控制R_PWM、G_PWM、B_PWM、Y_PWM，进而驱动蓝色激光器。进一步的，与之前的单色驱动不同之处是，通过DLP控制芯片的一个引脚Laser_sele对R_EN、G_EN、B_EN、Y_EN的一个进行选择。在三色驱动部分，用R_EN、G_EN、B_EN分别控制R_PWM、G_PWM、B_PWM，用R_PWM、G_PWM、B_PWM分别驱动红色激光器、绿色激光器以及蓝色激光器对应的控制芯片，从而控制点亮红色激光器、绿色激光器以及蓝色激光器。该驱动部分同样是通过DLP控制芯片的引脚Laser_sele对 R_EN、G_EN、B_EN、Y_EN的一个选择，确保在同一系统中有且只有一个系统正常运行(单色或三色)。该驱动模块可以在不变动硬件的前提下，仅仅对软件进行简单的配置就可以使系统在单色和三色之间互相切换，在此不再赘述。
本申请一个或多个实施例还提供了一种激光投影方法，应用于图1所示的投影装置，其中光阀位于光机模块中，在DLP架构中，光阀可以为DMD芯片。图5为本申请实施例提供的一种激光投影方法流程示意图。如图5所示，包括：
步骤501：获取预设色序，
预设色序指示出在每个周期中多个颜色的排列顺序，以及所述多个颜色中每种颜色对应的输出时长，多个颜色包括红色、绿色、蓝色以及混合色。其中，混合色为红色、绿色、蓝色中的至少两种颜色混合后的颜色。
步骤502：启动扩散轮，检测扩散轮中同步标志的位置。
需要说明的是，扩散轮旋转时，按照匀速旋转，旋转一周的时长等于预设色序指示的四种颜色对应的激光器的输出时长之和。
举例来说，若红色、绿色、蓝色以及混合色，对应的激光器的输出时长分别为第一时长、第二时长、第三时长以及第四时长，则扩散轮旋转一周的时长等于第一时长、第二时长、第三时长以及第四时长的累加和。
本申请实施例中，对于如何检测同步标志，并不限定。举例来说，一种实现方式是通过传感器检测同步标志。结合图3B所示，如图7所示，同步标志为黑色标签，贴于扩散轮上，可以随着扩散轮旋转。 本申请实施例提供的激光光源中包括一个传感器，该传感器垂直于扩散轮上侧切平面方向，在黑色标签转到此切平面处时可以被传感器探测到。当扩散轮带动黑色标签旋转，当黑色标签旋转于正对传感器的位置时，传感器由于检测到黑色标签而输出高电平信号，当扩散轮转动到其他位置时，传感器由于未检测到黑色标签而输出低电平信号。当扩散轮持续转动时，传感器也会周期性输出高电平信号和低电平信号。
本申请实施例中，同步标志指示出预设颜色在该预设色序中的起始位置，因此在进行投影之前，需要将该扩散轮中的同步标志，调整至与该预设色序中预设颜色相匹配的位置。
步骤503：判断扩散轮中同步标志的位置，是否位于与预设色序中预设颜色相匹配的位置；若是，则转至步骤505，否则转至步骤504。
举例来说，预设色序指示出四种颜色的排列顺序为红色、绿色、蓝色以及混合色，同步标志指示出红色在该预设色序中的起始位置。此时，扩散轮中的同步标志应该是与红色激光器对齐，具体可以参考图7所示，当同步标志与红色激光器对齐时，同步标志位于与红色相匹配的位置，否则不匹配。本申请实施例中，将同步标志调整到位于与红色相匹配的位置时，可以按照预设色序启动激光器，并同步选择扩散轮。
步骤504：调整扩散轮中的同步标志的位置，并返回步骤502。
具体的，可以将扩散轮按照预设的旋转方向旋转预设角度，当然还可以有其它方式，在此不再赘述。
步骤505：按照预设色序点亮红色激光器、绿色激光器以及蓝色激
步骤506：扩散轮透射按所述预设色序出射的多个基色，并入射至DMD。
步骤507：DMD根据待显示图像对应的驱动信号对多个基色进行调制。
本申请实施例中，在扩散轮实现色序同步时，将根据预设色段指示的顺序依次点亮每种颜色对应的激光器。DLP(Digital Light Processing，数字光处理器)将视频信号解码为数字微镜元件(Digital Micromirror Device，DMD)能识别的图像信号，根据每一帧图像中实际色彩值决定DMD在四种颜色对应的激光照射在DMD上时，是否将激光反射出去，具体过程不再赘述，可激光投影设备相关实施例的描述。
步骤507之后，可以再转至步骤505，显示下一帧的图像。
上述实施例提供的激光投影显示方法应用于三色激光器光源设备中，在每个周期中，按照预设色序指示出的四种颜色的排列顺序点亮激光器，由于四种颜色中包括混合色，混合色对应至少两个激光器，意味着在一个周期内，在点亮混合色对应的激光器时，点亮至少两个激光器，相对于传统三基色时序性的输出，每次只点亮一个激光器，可以显著增加激光投影时画面的亮度，同时，通过与DMD芯片的配合，能够根据待显示图像选择性地进行混合色的输出，在提升图像亮度的同时，还能够改善图像画面的色彩表现。
本申请一个或多个实施例还提供了一种激光光源的驱动控制方 法。图6为本申请实施例提供的一种激光光源的驱动控制方法流程示意图。如图6所示，包括：
步骤S601:启动扩散轮。
步骤602:获取预设色序，该预设色序指示在每个周期中多个基色的排列顺序，以及多个基色中每种颜色对应的输出时长，所述多个基色至少包括红色、绿色、蓝色。
步骤S603:确定扩散轮同步标志位于所述预设色序中预设颜色对应的位置。
步骤S604:按照所述预设色序点亮预设颜色对应的激光器。
本实施例中对于扩散轮相关描述参照图5对应的相关实施例描述，在此不再赘述。
最后应说明的是：本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备 的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (24)

  1. 一种激光投影设备，包括：
    激光光源，包括红色激光器、绿色激光器以及蓝色激光器，用于根据预设色序输出三基色激光和混合色激光；
    光机模块，用于根据待显示图像的驱动信号对输入的预设色序的激光进行调制。
  2. 如权利要求2所述的激光投影设备，所述混合色为红色、绿色、蓝色中的至少两种颜色混合后的颜色。
  3. 如权利要求1所述的激光投影设备，还包括驱动控制模块，用于获取预设色序，并按照所述预设色序点亮红色激光器、绿色激光器以及蓝色激光器。
  4. 如权利要求1所述激光投影设备，所述激光光源包括扩散轮，所述扩散轮上设置有同步标志，所述同步标志用于指示预设颜色在预设色序中的起始位置。
  5. 如权利要求4所述的激光投影装置，所述预设颜色为所述多种颜色中的任一种颜色。
  6. 如权利要求4所述的激光投影装置，所述扩散轮包括同轴设立的第一扩散轮和第二扩散轮：
    所述第一扩散轮，设置有对应所述多个基色的扇形分区，其中所述蓝色激光对应的分区为透明材料，所述绿色激光对应的分区为透明材料；
    所述第二扩散轮，设置有与所述第一扩散轮各颜色分区对应的扇形分区，其中所述蓝色激光对应的分区为扩散，所述绿色激光对应的分区为透明材料。
  7. 如权利要求4至6任一所述的激光投影设备，所述扩散轮旋转一周的时长等于每个周期中所述多个颜色中每种颜色对应的时长之和。
  8. 如权利要求3所述的激光投影设备，所述光机模块包括数字微镜元件DMD。
  9. 如权利要求8所述的激光投影设备，所述驱动控制模块用于基于所述待显示图像的颜色比例产生驱动控制信号，控制所述DMD中数字微反射竞品的开关。
  10. 如权利要求1所述的激光投影设备，所述光机模块用于，
    当点亮合成所述混合色所需的激光器时，若所述待显示图像中混合色比例大于预设比例，DMD根据待显示图像对应的驱动信号对所述混合色进行调制，并输出所述混合色。
  11. 如权利要求1所述的激光投影设备，所述光机模块用于：
    在所述待显示图像中混合色比例小于或等于所述预设比例时，所述DMD根据合成所述混合色所需的颜色调制所述所需的颜色的激光色，并输出。
  12. 一种激光光源驱动控制方法，包括：
    启动扩散轮；
    获取预设色序，所述预设色序指示每个周期中多个颜色的排列顺 序，以及所述多个颜色中每种颜色对应的输出时长，所述多个基色包括红色、绿色、蓝色；
    确定扩散轮中同步标志位于所述预设色序中预设颜色对应的位置；
    按照所述预设色序点亮预设颜色对应的激光器。
  13. 如权利要求12所述的方法，所述多个基色还包括混合色，所述混合色为红色、绿色、蓝色中的至少两种颜色混合后的颜色。
  14. 如权利要求12或13所述的方法，所述扩散轮旋转一周的时长等于每个周期中所述多个基色中每种颜色对应的时长之和。
  15. 如权利要求12所述的方法，所述按照所述预设色序点亮预设颜色对应的激光器之后，还包括：
    按照预设色序依次点亮其他基色对应的激光器。
  16. 如权利要求13所述的方法，还包括：
    按照预设色序点亮所述混合色对应的至少两种颜色的激光器。
  17. 如权利要求12所述的方法，所述预设颜色为红色。
  18. 一种激光投影方法，包括：
    获取预设色序；所述预设色序指示每个周期中多个基色的排列顺序，以及所述多个基色中每种颜色对应的输出时长，所述多个基色包括红色、绿色、蓝色以及混合色；
    确定扩散轮中同步标志位于所述预设色序中预设颜色对应的位置；
    按照所述预设色序点亮红色激光器、绿色激光器以及蓝色激光器；
    所述扩散轮透射按照所述预设色序出射的多个基色，并入射至数字微镜元件DMD；
    DMD根据待显示图像对应的驱动信号对所述多个基色进行调制。
  19. 如权利要求18所述方法，所述确定扩散轮中同步标志位于所述预设色序中预设颜色对应的位置，包括：
    判断所述扩散轮中同步标志的位置是否位于与预设色序中预设颜色相匹配的位置；
    若是，则按照所述预设色序点亮预设颜色对应的激光器并依次点亮其他颜色对应的激光器；
    若否，则调整所述扩散轮位置，并继续判断所述扩散轮中同步标志是否位于与预设色序中预设颜色相匹配的位置。
  20. 如权利要求18所述方法，还包括：
    当点亮合成所述混合色所需的激光器时，若所述待显示图像中混合色比例大于预设比例，DMD根据待显示图像对应的驱动信号对所述混合色进行调制，并输出所述混合色。
  21. 如权利要求18所述方法，还包括：
    当点亮合成所述混合色所需的激光器时，若所述待显示图像中混合色比例小于或等于预设比例，DMD根据合成所述混合色所需的颜色调制所需的颜色的激光并输出。
  22. 如权利要求18所述的方法，，所述混合色为红色、绿色、蓝色中的至少两种颜色混合后的颜色。
  23. 如权利要求18或19所述方法，所述预设颜色为红色。
  24. 如权利要求18所述的方法，所述扩散轮旋转一周的时长等于显示每帧所述待显示图像所需的时长，也等于每个周期中所述多个基色中每种颜色对应的时长之和。
PCT/CN2019/115328 2018-11-30 2019-11-04 一种激光投影设备及激光投影方法 Ceased WO2020108233A1 (zh)

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CN102520568A (zh) * 2011-11-30 2012-06-27 四川长虹电器股份有限公司 激光投影显示系统
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