Display driving method and augmented reality device

Abstract

The present invention discloses a display driving method and an augmented reality device, wherein the augmented reality AR device includes a light source, and the light source is used to output image light. The method includes: during the operation of the AR device, selecting a corresponding display mode according to the operating parameters of the AR device; wherein the display mode includes a performance mode and a power saving mode, and the display resolution in the performance mode is greater than the display resolution in the power saving mode; and the standby power consumption of the light source in the performance mode is less than the standby power consumption of the light source in the power saving mode; the standby power consumption of the light source refers to the power consumption corresponding to the initial current of the light source; and the light source is driven according to the selected display mode to output the image light. The above scheme is used to alleviate the technical problem in the prior art that the driving current of the LD is always above the threshold current, which causes the standby power consumption of the LD to always remain, the energy utilization rate is low, and it is difficult to meet the requirements of the AR device.

Description

Technical Field

[0001] The present invention relates to the field of projection display, and in particular to a display driving method and an augmented reality device. Background Art

[0002] The imaging principle of fiber scanning display (FSD) technology is to use a fiber scanning display device to drive the optical fiber to move along a predetermined two-dimensional scanning trajectory, and modulate the light source to output the light corresponding to each pixel of the image to be displayed. Then, the light corresponding to each pixel of the image to be displayed is projected one by one through the optical fiber onto the projection surface to form a projected image.

[0003] Laser display technology, combining the aforementioned fiber-optic scanning display technology with LD (Laser Diode) internal modulation, is considered an ideal optical display solution for AR (Augmented Reality) devices. During the display process, the LD frequently needs to be completely shut down (no light) at the pixel level and then instantly turned back on to a target brightness, placing high demands on the LD's response speed.

[0004] Considering the actual display frame rate and specification requirements, as well as the principles of fiber-optic scanning display technology, fiber-optic scanning display technology places extremely high demands on the LD's response time. The LD's light energy output must instantly reach the target display value from 0 in nanoseconds or even sub-nanometers. Furthermore, the LD's light-emitting principle dictates that its response time is limited by the inherent characteristics of the material and device.

[0005] In order to reduce the response time of LD during fast modulation, the conventional practice is to keep the driving current of LD always above the threshold. However, this method will cause the standby power consumption of LD to always remain the same, resulting in low energy utilization. In addition, AR devices themselves have high requirements for battery life, so current LDs are difficult to meet the requirements of AR devices. Summary of the Invention

[0006] The purpose of the present invention is to provide a display driving method and an augmented reality device, which are used to alleviate the technical problem in the prior art that the driving current of the LD is always above the threshold current, which causes the LD standby power consumption to always remain, the energy utilization rate is low, and it is difficult to meet the requirements of the AR device.

[0007] To achieve the above-mentioned object of the invention, a first aspect of an embodiment of the present invention provides a display driving method, which is applied to an augmented reality (AR) device. The AR device includes a light source, and the light source is used to output image light. The method includes:

[0008] During operation of the AR device, a corresponding display mode is selected according to operating parameters of the AR device; wherein the display mode includes a performance mode and a power saving mode; the display resolution in the performance mode is greater than the display resolution in the power saving mode; and the standby power consumption of the light source in the performance mode is less than the standby power consumption of the light source in the power saving mode; the standby power consumption of the light source refers to the power consumption corresponding to the initial current of the light source;

[0009] The light source is driven according to a selected display mode to output the image light.

[0010] Optionally, during the operation of the AR device, selecting a corresponding display mode according to operating parameters of the AR device includes:

[0011] Obtain a display application scenario of the AR device, and select a corresponding display mode according to the type of the display application scenario.

[0012] Optionally, the display application scenarios include one or more of video, game, prompt information, navigation, and social interaction; wherein, when displaying video or game, the performance mode is selected, and when displaying prompt information, navigation, or social interaction, the power saving mode is selected.

[0013] Optionally, the display resolution in the performance mode is greater than the display resolution in the power saving mode; and driving the light source to output the image light according to the selected display mode includes:

[0014] In the power saving mode, adjusting a pixel grayscale value LUT table or image source information of the AR device to merge multiple pixels to be displayed by the AR device into one pixel;

[0015] The light source is controlled to output the image light according to the combined pixel information.

[0016] Optionally, the light source is a laser, and the initial current of the light source in the performance mode varies within a preset current range, the minimum value of the preset current range is 0, and the maximum value is the threshold current for the laser to generate laser; the initial current of the light source in the power saving mode is 0.

[0017] Optionally, the method further includes:

[0018] In the performance mode, obtaining a valid scanning time and an invalid scanning time of a scanning display device connected to the light source;

[0019] During the effective scanning time, the threshold current of the light source is turned on; during the invalid scanning time, the threshold current of the light source is turned off.

[0020] Optionally, the method further includes:

[0021] In the performance mode, obtaining a valid scanning time and an invalid scanning time of a scanning display device connected to the light source;

[0022] During the effective scanning time, the initial current of the light source is set within the preset current range according to the pixel information to be displayed by the AR device;

[0023] During the invalid scanning time, the threshold current of the light source is turned off.

[0024] Optionally, setting the initial current of the light source according to pixel information to be displayed by the AR device includes:

[0025] Acquire pixel information to be displayed by the AR device within the effective scanning time; the pixel information to be displayed includes pre-cached continuous pixel information;

[0026] When the grayscale information of the color channels corresponding to multiple consecutive pixel information is all 0, the threshold current of the light source corresponding to the color channel is turned off; when the grayscale information of the color channel corresponding to the pixel information is not 0, the threshold current of the light source corresponding to the color channel is turned on.

[0027] Optionally, when the grayscale information of the color channel corresponding to the pixel information is not 0, turning on the threshold current of the light source corresponding to the color channel includes:

[0028] When the grayscale information of the color channel corresponding to the pixel information is not 0, the threshold current of the light source corresponding to the color channel is turned on at least one pixel in advance.

[0029] A second aspect of an embodiment of the present invention provides a non-transitory computer-readable storage medium having a computer program stored thereon, which implements the steps of the method described in the first aspect when executed by a processor.

[0030] A third aspect of an embodiment of the present invention provides an augmented reality device, including:

[0031] a memory having a computer program stored thereon;

[0032] A processor is used to execute the computer program in the memory to implement the steps of the method as described in the first aspect.

[0033] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0034] In the solution of the embodiment of the present invention, during the operation of the AR device, a corresponding display mode is selected according to the operating parameters of the AR device; wherein the display mode includes a performance mode and a power saving mode, and the initial current of the light source in the performance mode is greater than the initial current of the light source in the power saving mode; then, the light source is driven according to the selected display mode to output the image light. The appropriate display mode is selected according to the operating parameters of the AR device. In different display modes, the display resolution and the standby power consumption of the light source are different. This can alleviate the technical problem in the prior art that the driving current of the LD is always above the threshold current, which causes the LD standby power consumption to always remain, the energy utilization rate is low, and it is difficult to meet the requirements of the AR device. It can achieve the technical effect of reducing the standby power consumption of the LD and extending the battery life of the AR device. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work.

[0036] Figure 1 A schematic diagram of a scanning trajectory of a grid scanning mode provided by an embodiment of the present invention;

[0037] Figure 2 A schematic flow chart of a display driving method provided by an embodiment of the present invention;

[0038] Figure 3A-3C A schematic diagram of invalid scanning time and valid scanning time provided by an embodiment of the present invention;

[0039] Figure 4 A block diagram of an augmented reality device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] In the embodiment of the present invention, two driving modes of LD are first described.

[0042] LD threshold current I th Refers to the critical current of the laser to generate laser, which is higher than I thWhen LD starts to emit laser; below I th When the LD spontaneously radiates, it is impossible to form controlled, high energy density, and monochromatic light. th Below, the LD response time is relatively long, which can reach tens of ns. Therefore, during internal modulation, the current provided by the LD drive current is usually composed of two parts: I1 = I th +I b , where I th is the DC component (unchanged), I b is the bias current (variable modulation current), through I b The change of the signal enables the LD to respond quickly to achieve stable light energy output. The above driving mode is called I1 driving mode in the present invention. Another driving mode is I2 driving mode, I2 = I b , that is, there is no DC component, and the resulting problem is that the LD response time increases.

[0043] Based on the information of the above I1 driving mode and I2 driving mode, when LD adopts I2 driving mode, if the color corresponding to the displayed image or pixel information is 0, the driving current of LD corresponding to the color is 0, and the corresponding power consumption is P=0. When LD adopts I1 driving mode, if the color corresponding to the displayed image or pixel information is 0, the driving current corresponding to the color is I th , its power consumption is P=U*I th , U is the voltage, P2 is the LD standby power consumption, which is a fixed value that is always present as long as the device is powered on and has nothing to do with the displayed content. The colors can be three color channels: R (red), G (green), and B (blue).

[0044] According to the characteristics of fiber optic scanning display technology, grid scanning is used as an example to illustrate. Figure 1 As shown, Figure 1 A schematic diagram of the optical fiber trajectory for raster scanning according to an embodiment of the present invention. The grid in the background is a virtual pixel grid created artificially. A raster scanning scanner includes two actuators, one for driving the fast axis (horizontally) and the other for driving the slow axis (vertically). Generally, the slow axis drive frequency is lower than the fast axis drive frequency. The optical fiber sweeps along a raster trajectory, driven by the synergistic vibrations generated by the two actuators.

[0045] During the grid-type fiber scanning process, the fiber trajectory speed is not constant. For the fast axis direction, the LD display time corresponding to the pixels in the center and the edge of the screen is very different, which means that the response time requirements for LD are different when the center and edge of the screen are displayed. For a single pixel in the center of the screen, the corresponding pixel time t pixelShorter, requires LD to respond faster (such as 10ns or even lower level), if the LD response time exceeds t pixel , the driving information of LD has been switched to the next pixel, then the pixel is not lit; and the single pixel at the edge of the screen has a corresponding pixel duration t pixel The longer the time, the lower the requirement for LD response (such as 50ns level). The lower requirement means that the time corresponding to the trajectory of the pixel is longer. Within this time range, the LD lights up and the light is spatially transmitted, which is the information of the pixel.

[0046] The above-mentioned grid scanning is only an example. The display driving method in the embodiment of the present invention is also applicable to Lissajous scanning and spiral scanning, which will not be described in detail in this specification.

[0047] Based on the characteristics of the above-mentioned fiber scanning trajectory, when using the I2 drive mode, the picture may not be displayed normally, especially for the central part of the picture. If the adjacent pixel information switches significantly, the grayscale of a certain color channel of four adjacent pixels is 0-255-0-255 in sequence. Since the LD cannot complete the lighting quickly, the grayscale information of the corresponding color channels of the four pixels actually displayed may be 0-0-0-0, that is, the picture is completely dark.

[0048] In AR applications, the most frequent display application scenario is to provide prompt information. This type of information has the following characteristics: (1) the entire display area does not always maintain all three colors and grayscale information that is not zero; (2) the requirements for display fineness are relatively low (i.e., the resolution requirements are low); (3) AR devices have high requirements for battery life.

[0049] Based on the characteristics of the aforementioned AR device, embodiments of the present invention provide two optional display modes in the AR device: performance mode and power-saving mode. Performance mode is used in scenarios requiring high image display resolution and fineness, such as audio-visual entertainment and video games. Power-saving mode, on the other hand, is used in scenarios requiring low image display resolution and primarily for informational purposes, such as directions, navigation, and social networking applications.

[0050] like Figure 2 As shown, the display driving method in the embodiment of the present invention includes the following steps.

[0051] Step 201: During the operation of the AR device, a corresponding display mode is selected according to the operating parameters of the AR device;

[0052] Among them, the display mode includes performance mode and power saving mode, the display resolution in the performance mode is greater than the display resolution in the power saving mode; and the standby power consumption of the light source in the performance mode is less than the standby power consumption of the light source in the power saving mode; the standby power consumption of the light source refers to the power consumption corresponding to the initial current of the light source.

[0053] Step 202: driving the light source to output the image light according to the selected display mode.

[0054] In a possible implementation, in performance mode, the LD adopts the I1 driving mode, and the initial current of the light source is I th Since LD can respond quickly to achieve stable light energy output, it can provide higher display resolution.

[0055] In power saving mode, LD adopts I2 driving mode, which can greatly reduce standby power consumption P0 and increase battery life. Due to the longer response time of LD, it can provide a lower display resolution than the performance mode. For example, assuming the display resolution in performance mode is M*N, the way to reduce the display resolution is as follows:

[0056] 1 / 2M*1 / 2N: The two pixels in the corresponding performance mode are merged into one pixel, increasing the pixel duration;

[0057] 1 / 3M*1 / 3N: The three pixels in the corresponding performance mode are merged into one pixel, increasing the pixel duration;

[0058] 1 / 4M*1 / 4N: The four pixels in the corresponding performance mode are merged into one pixel, increasing the pixel duration.

[0059] According to the response characteristics of the LD itself, several specific pixels can be pre-set to be merged into one. This can be achieved by adjusting the LUT table of the scanned pixel grayscale value, or by performing corresponding processing on the displayed image source information.

[0060] In an embodiment of the present invention, the operating parameters of the AR device can be display application scenarios. As described in the aforementioned embodiment, the display application scenarios include videos, games, prompt information, navigation, social networking, etc.; for scenarios with high requirements for image display fineness and resolution, such as audio and video entertainment, video games, etc., the performance mode is selected; and for application scenarios with low requirements for image display resolution and mainly serving as information prompts, such as instructions, navigation, and social software, the power saving mode is selected.

[0061] In the embodiment of the present invention, the operating parameters of the AR device may also be the power level of the device, instructions input by the user, etc., which are not limited by the present invention.

[0062] In another possible implementation, in order to further reduce power consumption, an optimized dynamic drive adjustment mode may be selected based on the performance mode and the power saving mode.

[0063] In fiber-optic scanning display technology, due to factors such as the nonlinear control of the fiber-optic scanning trajectory, display duration specificity, energy uniformity correction requirements, circuit chip processing requirements, and cost control, only a portion of the actual scanning trajectory is used to display information, while the remaining trajectory is unused. The effective scanning utilization rate of fiber-optic scanning display technology can be defined as the ratio of the trajectory duration used for information display to the mechanical scanning trajectory repetition period when a white screen is displayed. Assuming this ratio is r, the ratio of 1-r is the ineffective scanning time (for information display). In other words, effective scanning time refers to the time when the scanning display device's scanning trajectory is used to display an image; ineffective scanning time refers to the time when the scanning display device's scanning trajectory is not used to display an image.

[0064] In mechanical scanning-based imaging, the scanning trajectory is mechanically continuous, generally taking the form of a trigonometric function. Taking raster scanning as an example, to ensure proper image display, the trajectory spacing in the slow axis (low frequency) direction must be uniform. This means that the speed of the slow axis trajectory must be kept nearly constant through trajectory control. However, in terms of control difficulty, achieving a perfect straight line transition at the edge of the slow axis trajectory is difficult, meaning that the trajectory control accuracy at the edge is poor, making it unsuitable for imaging. The scanning trajectory during this period is defined as an invalid trajectory, and the corresponding time is the invalid scanning time.

[0065] Similarly, the slow axis is controlled to form a sawtooth or quasi-sawtooth wave trajectory. After the slow axis reaches the edge, it will quickly retrace in a very short time. However, due to the continuity problem of the mechanical scanning trajectory, this part of the retracement will definitely take a certain amount of time and is not suitable for imaging. It is also classified as invalid scanning time. In addition, the fast axis high-frequency scanning, the trajectory can be represented by trigonometric functions. In order to make the pixels uniform, a variable modulation signal is required to excite the LD to emit light. Since the boundary and middle speeds differ infinitely, the difficulty and cost of hardware implementation increase dramatically. Therefore, the fast axis edge trajectory is not used for imaging, and this part is also classified as an invalid scanning trajectory.

[0066] The Lissajous scan format is similar. Generally, the part of the trajectory that is not used for information display is defined as an invalid scan trajectory, and the corresponding time is the invalid scan time.

[0067] Next, combine Figure 3A-3C Explain the invalid scan time and valid scan time.

[0068] like Figure 3AAs shown, it is the two-dimensional scanning trajectory of the optical fiber. The horizontal axis is the time measured by a single cycle of the fast axis. The length of half a cycle of the fast axis corresponds to the time from the leftmost end of the trajectory to the adjacent rightmost end, that is, t1 and t4. Since the speed changes according to the trigonometric function, considering the limitations of the actual hardware driver, the edge is not used for imaging, that is, t2-t1 and t4-t3 are invalid scanning times, and t3-t2 is the effective scanning time.

[0069] like Figure 3B As shown, the slow axis trajectory of the optical fiber is an isosceles triangle pattern. The horizontal axis is the time corresponding to the slow axis, and t6-t1 corresponds to a slow axis cycle. Due to the difficulty of trajectory control and the actual response characteristics of the scanning display device, the speed changes significantly at the corners and cannot be used for imaging. It is also an invalid scanning trajectory, specifically t2-t1, t4-t3, and t6-t5.

[0070] like Figure 3C As shown, another form of scanning trajectory, a quasi-sawtooth wave, is shown. The horizontal axis corresponds to time, and the figure depicts the actual motion trajectory of the slow axis of the optical fiber. t3-t1 corresponds to a slow axis cycle. Similarly, due to the control difficulty and the actual response characteristics of the scanning display device, the time period when the speed changes drastically and is not used for imaging is invalid scanning time, specifically t2-t1.

[0071] In performance mode, during the invalid scan time, due to I th If it exists, it will always contribute part of the power consumption P1, and the black screen in the screen display (for a certain color channel, the grayscale information of the color channel is 0) will also contribute to the power consumption P2. At this time, the standby power consumption consists of two parts: P0=P1+P2.

[0072] Therefore, during the invalid scan time, the turn-off threshold current I th , maintain I2 drive mode to reduce power consumption, and according to the characteristics of the scanning track of the grid scanning method, the invalid scanning time is usually several fast axis scanning cycles (long time), so it is easy to realize the corresponding drive configuration conversion in the circuit. When the fiber scanning enters the effective scanning time area, turn on I th , maintain the I1 driving mode, so that the power consumption of P1 can be eliminated, and the power consumption can be further reduced in the high-performance mode.

[0073] In an embodiment of the present invention, when the scanning enters the effective scanning time, the initial current of the light source may be turned on at least one pixel in advance, thereby ensuring the response speed of the light source.

[0074] In another possible embodiment, for normal display content, each pixel is unpredictable information. In order to further reduce the LD standby power consumption, the information to be displayed of the scanning display device can be obtained within the effective scanning time (such as pre-caching the display content of one line, several lines, or even one frame). Then, according to the continuous pixel information content, for the black picture in the picture display, the threshold current I is turned off. th , when you need to output display information, selectively open I in advance th , which can not only achieve the purpose of reducing P2, but also ensure the response speed of LD, that is, in this mode, the actual driving current I1 consists of two parts, the changing I th1 and I b . Changes I th1 The current changes within the preset current range, which is [0, I th ], the minimum value is 0, and the maximum value is the threshold current I of the laser to generate laser th .

[0075] For example, the grayscale of a certain continuous pixel information is 0-0-0-200-50-0-80-120-160-180. Assuming that the conventional I1 driving mode is used, the corresponding thresholds are 5-5-5-5-5-5-5-5-5-5, and the bias currents ib are 0-0-0-20-5-0-8-12-16-18 respectively. According to the optimized driving mode, it can be I th They are 0-0-5-5-5-5-5-5-5-5 respectively, and the bias current i b They are 0-0-0-20-5-0-8-12-16-18 respectively, or when the initial current of the light source is turned on in advance, the initial current of the light source is less than the threshold current, and then gradually increases to the threshold current. In this process, ensure that I th +I b It can realize pixel information display. For example: th 0-0-5-5-5-3-3-3-4-5 respectively, I b They are 0-0-0-20-5-0-10-14-17-18 respectively.

[0076] It can be seen that in the solution of the embodiment of the present invention, the power consumption can be optimized according to the different display information to reduce P2. The above example is only for illustration. th , when the driving current is at I th When the distance is below th The farther away, the longer the lighting time required, and the closer the distance, the shorter the time required. Therefore, the above solution is feasible in optimizing power consumption.

[0077] In an embodiment of the present invention, the laser includes three-color lasers of R, G, and B, and in AR display, the entire display area does not always maintain all three colors and have non-zero grayscale information. Therefore, the laser of each color can be controlled independently, and the driving mode of each laser can be flexibly and dynamically adjusted to ensure the quality of image display while minimizing the standby power consumption of the light source as much as possible, thereby improving energy utilization and extending the battery life of the AR device.

[0078] It should be noted that the solution implemented in the present invention is not only applicable to optical fiber scanning, but also to laser scanning imaging systems such as MEMS (English full name: Microelectro Mechanical Systems, Chinese name: micro-electromechanical systems).

[0079] Based on the same inventive concept, an embodiment of the present invention further provides an augmented reality device 400, such as Figure 4 As shown, it includes a light source 401, which is used to output image light; a scanning display device 402 connected to the light source 401, and the light emitted by the light source 401 is coupled into the scanning display device 402 and emitted through the scanning display device 402; a memory 403, which stores a computer program; and a processor 404, which is used to execute the computer program in the memory 403 to implement the above-mentioned display driving method and control the light source 401 to emit light.

[0080] Embodiments of the present invention further provide a computer-readable storage medium comprising program instructions, which, when executed by a processor, implement the steps of the aforementioned display driving method. For example, the computer-readable storage medium may be a memory, and the program instructions may be executed by a processor of an augmented reality device to perform the aforementioned display driving method.

[0081] An embodiment of the present invention further provides a computer program product, which includes a computer program that can be executed by a programmable device, and has a code portion for executing the above display driving method when executed by the programmable device.

[0082] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0083] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or similar features. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0084] The present invention is not limited to the aforementioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A display driving method, applied to an augmented reality (AR) device, wherein the AR device includes a light source configured to output image light, wherein: The method comprises: During operation of the AR device, a display application scenario of the AR device is obtained, and a corresponding display mode is selected according to a resolution requirement corresponding to the type of the display application scenario; wherein the display mode includes a performance mode and a power saving mode; the display resolution in the performance mode is greater than the display resolution in the power saving mode; and the standby power consumption of the light source in the performance mode is greater than the standby power consumption of the light source in the power saving mode; the standby power consumption of the light source refers to the power consumption corresponding to the initial current of the light source; The light source is driven according to a selected display mode to output the image light.

2. The method according to claim 1, wherein The display application scenarios include one or more of video, game, prompt information, navigation, and social interaction; wherein, when displaying video or game, the performance mode is selected, and when displaying prompt information, navigation, or social interaction, the power saving mode is selected.

3. The method according to claim 1, wherein Driving the light source to output the image light according to the selected display mode includes: In the power saving mode, adjusting a pixel grayscale value LUT table or image source information of the AR device to merge multiple pixels to be displayed by the AR device into one pixel; The light source is controlled to output the image light according to the combined pixel information.

4. The method according to any one of claims 1 to 3, wherein The light source is a laser, and the initial current of the light source in the performance mode is a threshold current for the laser to generate laser light; the initial current of the light source in the power saving mode is 0.

5. The method according to any one of claims 1 to 3, wherein The light source is a laser, and the initial current of the light source in the performance mode varies within a preset current range, the minimum value of the preset current range is 0, and the maximum value is the threshold current for the laser to generate laser light; the initial current of the light source in the power saving mode is 0.

6. The method according to claim 5, wherein The method further comprises: In the performance mode, obtaining a valid scanning time and an invalid scanning time of a scanning display device connected to the light source; During the effective scanning time, the threshold current of the light source is turned on; during the invalid scanning time, the threshold current of the light source is turned off.

7. The method according to claim 5, wherein The method further comprises: In the performance mode, obtaining a valid scanning time and an invalid scanning time of a scanning display device connected to the light source; During the effective scanning time, the initial current of the light source is set within the preset current range according to the pixel information to be displayed by the AR device; During the invalid scanning time, the threshold current of the light source is turned off.

8. The method according to claim 7, wherein Setting the initial current of the light source within the preset current range according to pixel information to be displayed by the AR device includes: Acquire pixel information to be displayed by the AR device within the effective scanning time; the pixel information to be displayed includes pre-cached continuous pixel information; When the grayscale information of the color channels corresponding to multiple consecutive pixel information is all 0, the threshold current of the light source corresponding to the color channel is turned off; when the grayscale information of the color channel corresponding to the pixel information is not 0, the threshold current of the light source corresponding to the color channel is turned on.

9. The method according to claim 8, wherein When the grayscale information of the color channel corresponding to the pixel information is not 0, turning on the threshold current of the light source corresponding to the color channel includes: When the grayscale information of the color channel corresponding to the pixel information is not 0, the threshold current of the light source corresponding to the color channel is turned on at least one pixel in advance.

10. An augmented reality device, characterized in that: The augmented reality device includes a light source, and the light source is used to output image light; including: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 9.

Images