Micro-display dimming system and dimming method

Abstract

The invention provides a micro-display dimming system and a dimming method, and relates to the technical field of display. The system comprises a dimming configuration module, a coding and gating enabling module, a dimming module and a pixel circuit module, the coding and gating enabling module is respectively connected with the dimming configuration module and the pixel circuit module; the dimming module is respectively connected with the dimming configuration module and the pixel circuit module; the pixel circuit module comprises a row driving unit, a column driving unit and a pixel circuit; the pixel circuit comprises a plurality of sub-pixel units; the coding and gating enabling module is used for generating deformed data and gating enabling signals; the dimming module is used for generating a dimming signal according to the dimming command; the pixel circuit module conducts a target sub-pixel unit according to the received gating enable signal; and the pixel circuit module controls the display material corresponding to each target sub-pixel unit to display according to the dimming signal. According to the method, the problems of color deviation, non-uniform gray scale transition and the like can be avoided, and the dimming effect is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a micro-display dimming system and a dimming method. Background Art

[0002] With the continuous development of display technology, the function of adjusting display brightness will be widely used in various display screens, bringing more convenience to people's lives and work. By adjusting the display brightness of the display chip, the brightness of the display screen can be made more in line with the visual habits of the human eye, reducing eye fatigue and discomfort, and improving the user's viewing experience.

[0003] The traditional dimming system uses a method of adding a constant current direct current / direct current (DC / DC) converter that can quickly control the current on the basis of a DC constant voltage source, or adding a pulse width modulation (PWM) chopper switch on the constant current power supply output to adjust the display brightness.

[0004] However, the dimming method described above may cause color deviation and excessive grayscale unevenness, resulting in poor adjustment effect. Summary of the invention

[0005] The purpose of the present application is to provide a micro display dimming system and a dimming method to improve the dimming effect of the dimming system in view of the above-mentioned deficiencies in the prior art.

[0006] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows: In a first aspect, an embodiment of the present application provides a micro display dimming system, comprising: a dimming configuration module, an encoding and gating enabling module, a dimming module and a pixel circuit module; the encoding and gating enabling module is connected to the dimming configuration module, and the encoding and gating enabling module is connected to the pixel circuit module; the dimming module is respectively connected to the dimming configuration module and the pixel circuit module; The pixel circuit module includes: a row driving unit, a column driving unit and a pixel circuit; the pixel circuit includes: a plurality of sub-pixel units; The dimming configuration module is used to receive a dimming command; the dimming command is used to indicate a dimming mode or brightness adjustment information; The encoding and strobe enable module is used to encode the input video source data according to the dimming command to generate deformed data and a strobe enable signal corresponding to the deformed data; The dimming module is used to generate a dimming signal according to the dimming command, and the dimming signal includes: a grayscale quantization refresh signal and a global coordination pulse signal; The pixel circuit module is used to turn on at least one target sub-pixel unit among the plurality of sub-pixel units through the row driving unit and the column driving unit according to the received gate enable signal; The pixel circuit module is also used to control the display driving circuit corresponding to each of the target sub-pixel units to be turned on according to the dimming signal, so as to drive the display material corresponding to the target sub-pixel unit to display.

[0007] Optionally, it further includes: a dimming strategy module; the dimming strategy module is connected to the dimming configuration module and the code and gating enable module respectively; The dimming strategy module is used to identify the dimming command and determine the dimming strategy indicated by the dimming command; The encoding and gating enable module is specifically used to encode the video source data according to the dimming strategy to generate deformed data and a gating enable signal corresponding to the deformed data.

[0008] Optionally, the dimming module is specifically used to generate a grayscale quantization refresh signal and a global co-control pulse signal according to the dimming strategy, and the global co-control pulse signal includes: a pulse signal duty cycle and a signal flipping frequency; the grayscale quantization refresh signal is used to control the voltage size to complete the grayscale conversion of the target sub-pixel unit; the global co-control pulse signal is used to control the display time of the display material of the target sub-pixel unit.

[0009] Optionally, the row driving unit is connected to one end of a first switch component in each sub-pixel unit; the other end of the first switch component is respectively connected to one end of a pixel capacitor and a first end of a second switch component; The second end of the second switch component is connected to the first end of the third switch component; The second end of the third switch component is connected to one end of the display material; The column driving unit is connected to the third end of the second switch component in each sub-pixel unit.

[0010] Optionally, the row driving unit is used to determine the target row to be turned on currently according to the row driving signal in the gate enable signal; The column driving unit is used to turn on each target sub-pixel unit in the target row according to the column driving signal in the selection enable signal, and charge the pixel capacitor of each target sub-pixel unit through the grayscale quantization refresh signal, and when the charging voltage of the pixel capacitor reaches a preset voltage, control the conduction or closing of the third switch component in each target sub-pixel unit through the global coordination pulse signal to drive the display material corresponding to each target sub-pixel unit to display.

[0011] Optionally, if the dimming command indicates a dimming mode, the dimming strategy module determines the dimming strategy corresponding to the dimming mode according to the dimming mode, and pre-processes the pixel circuit module according to the dimming strategy; the dimming mode includes: maintaining resolution and reducing refresh rate or maintaining refresh rate and increasing resolution.

[0012] Optionally, if the dimming mode is to maintain resolution and reduce refresh rate, the dimming strategy module determines the number of sub-frames to be divided into for each frame and the number of rows and columns to be displayed in each sub-frame in the pixel circuit module based on the original resolution, the original refresh rate and the refresh rate to be displayed.

[0013] Optionally, if the dimming mode is to maintain refresh rate and reduce resolution, the dimming strategy module divides the multiple sub-pixel units into regions according to the original resolution and the resolution to be displayed, obtains multiple groups of pixel units, and determines the number of sub-pixel units to be displayed in each group of pixel units.

[0014] Optionally, the dimming module is specifically used to determine a grayscale quantization refresh signal according to the dimming strategy; Determining pressure difference information according to the grayscale quantization refresh signal; The duty cycle of the pulse signal in the global cooperative control pulse signal is determined according to the pressure difference information and the brightness adjustment information.

[0015] In a second aspect, an embodiment of the present application further provides a dimming method, which is applied to a pixel circuit module in the micro display dimming system described in the first aspect above, and the method includes: Receive a gating enable signal and a dimming signal; the dimming signal includes: a grayscale quantization refresh signal and a global coordination pulse signal; According to the gate enable signal, turning on a target sub-pixel unit among the plurality of sub-pixel units through the row driving unit and the column driving unit; The display driving circuit corresponding to the target sub-pixel unit is controlled to be turned on according to the dimming signal, so as to drive the display material corresponding to the target sub-pixel unit to display.

[0016] The beneficial effects of this application are: The present application provides a micro-display dimming system and a dimming method, the system comprising: a dimming configuration module, an encoding and strobing enabling module, a dimming module and a pixel circuit module; the encoding and strobing enabling module is connected to the dimming configuration module, and the encoding and strobing enabling module is connected to the pixel circuit module; the dimming module is respectively connected to the dimming configuration module and the pixel circuit module; the pixel circuit module comprises: a row driving unit, a column driving unit and a pixel circuit; the pixel circuit comprises: a plurality of sub-pixel units; the dimming configuration module is used to receive a dimming command; the dimming command is used to indicate a dimming mode or brightness adjustment information; the encoding and strobing enabling module is used to generate a dimming signal based on the dimming configuration module ... The input video source data is encoded and processed according to the dimming command to generate deformed data and a selection enable signal corresponding to the deformed data; the dimming module is used to generate a dimming signal according to the dimming command, and the dimming signal includes: a grayscale quantization refresh signal and a global coordination pulse signal; the pixel circuit module is used to turn on at least one target sub-pixel unit among multiple sub-pixel units through a row drive unit and a column drive unit according to the received selection enable signal; the pixel circuit module is also used to control the display drive circuit corresponding to each target sub-pixel unit to be turned on according to the dimming signal, so as to drive the display material corresponding to the target sub-pixel unit to display. This system introduces a dimming configuration module and a dimming module, so that the dimming module can generate the required dimming signal for dimming control according to the dimming command input by the dimming configuration module, wherein the grayscale quantization refresh signal and the global co-control pulse signal are combined as the dimming signal, the grayscale quantization refresh signal is used to control the voltage to complete the grayscale conversion, and the global co-control pulse signal is used as a global signal to enhance or weaken the overall display brightness by controlling the display time of the display material, thereby adjusting the display screen brightness of the display to the visual comfort zone of the human eye, which not only ensures that the color of the display screen does not deviate, but also makes the grayscale transition more uniform, thereby improving the display efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the architecture of a micro display dimming system provided in an embodiment of the present application; Figure 2 A schematic diagram of the architecture of another micro-display dimming system provided in an embodiment of the present application; Figure 3 A dimming timing diagram provided in an embodiment of the present application; Figure 4A schematic diagram of a pixel circuit structure of a micro-display dimming system provided in an embodiment of the present application; Figure 5 A working principle diagram of a scenario of maintaining resolution and reducing refresh rate provided in an embodiment of the present application; Figure 6 A working principle diagram of a scenario of maintaining refresh rate and reducing resolution provided by an embodiment of the present application; Figure 7 A schematic diagram of a dimming effect provided in an embodiment of the present application; Figure 8 A schematic diagram of a pixel circuit structure of another micro-display dimming system provided in an embodiment of the present application; Fig. 9 A schematic diagram of a pixel circuit structure of another micro-display dimming system provided in an embodiment of the present application; Fig.10 A schematic diagram of a dimming method provided in an embodiment of the present application; Fig.11 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of explanation and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn in real proportion. The flowchart used in this application shows the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowchart can be implemented out of sequence, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flowchart under the guidance of the content of the present application, or remove one or more operations from the flowchart.

[0020] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0021] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

[0022] Figure 1 An architectural schematic diagram of a micro-display dimming system provided in an embodiment of the present application, the system includes: a dimming configuration module, an encoding and gating enable module, a dimming module and a pixel circuit module; the encoding and gating enable module is connected to the dimming configuration module, and the encoding and gating enable module is connected to the pixel circuit module; the dimming module is respectively connected to the dimming configuration module and the pixel circuit module.

[0023] The pixel circuit module includes: a row driving unit, a column driving unit and a pixel circuit; the pixel circuit includes: a plurality of sub-pixel units.

[0024] The pixel circuit module may include multiple pixel circuits, and each pixel circuit may include multiple sub-pixel units. Therefore, the multiple sub-pixel units in the pixel circuit module may be composed of multiple sub-pixel units under one pixel, or may be composed of multiple sub-pixel units under multiple pixels.

[0025] That is to say, the multiple sub-pixel units included in the pixel circuit module are not necessarily multiple sub-pixel units under one pixel, but may also be multiple sub-pixel units under multiple pixels.

[0026] Wherein, a plurality of sub-pixel units are arranged in an array to form a structure of multiple rows and columns. A row driving unit and a column driving unit are respectively connected to each sub-pixel unit, the row driving unit is used to select a target row from multiple rows as the current row to be controlled, and the column driving unit is used to conduct the sub-pixel units in each column of the currently selected target row.

[0027] The dimming configuration module is used to receive dimming commands; the dimming commands are used to indicate dimming modes or brightness adjustment information.

[0028] The dimming configuration module is used to receive the dimming command automatically sent by the host computer, or receive the dimming command manually input by the user. The dimming command may include content in different forms. In automatic mode, the dimming command may include brightness adjustment information, which is used to indicate the current brightness information of the display and the brightness information to be adjusted. In manual mode, the dimming command may include dimming mode information and brightness adjustment information, wherein the dimming mode information is used to indicate whether to maintain the refresh rate and reduce the resolution, or maintain the resolution and reduce the refresh rate when dimming.

[0029] It is worth mentioning that the refresh rate refers to the number of times the display refreshes the image per second, usually measured in Hertz (Hz). A high refresh rate means that more images can be displayed per second, making the picture smoother and reducing delays and blur.

[0030] Resolution: Refers to the number of pixels a monitor can display, usually expressed as width times height (such as 1920x1080, or 1080p). Higher resolution means more detail and clarity can be displayed on the screen.

[0031] Maintaining refresh rate while reducing resolution means lowering the resolution in order to maintain a high refresh rate when adjusting the monitor settings. Maintaining refresh rate while reducing resolution is a trade-off made under the limitations of hardware performance. It is suitable for scenes that require fast response and smooth images, but it may sacrifice some of the clarity and detail of the image.

[0032] Maintaining resolution while reducing refresh rate means that when adjusting the monitor settings, the refresh rate is reduced in order to maintain a higher resolution. Maintaining resolution while reducing refresh rate is a trade-off choice made when high resolution needs to be maintained. It is suitable for scenes with extremely high requirements for image clarity and details, but it may sacrifice some of the smoothness and visual comfort of the picture.

[0033] The encoding and strobe enable module is used to encode the input video source data according to the dimming command, and generate deformed data and a strobe enable signal corresponding to the deformed data.

[0034] Video source data can be obtained after processing video signals, and contains pixel data of images or videos. Video signals can be obtained from external sources (cameras or video files, etc.). These signals may be analog (such as composite analog video signals, S-video signals) or digital (such as RGB component video, network video, etc.).

[0035] The video source data indicates the content that each pixel needs to display in the end, including the color and component value of the pixel.

[0036] The encoding and gating enable module can encode the input video source data according to the dimming strategy corresponding to the dimming command, and output the deformed data and the gating enable signal corresponding to the deformed data.

[0037] The gate enable signal includes: a row gate enable signal and a column gate enable signal. The gate enable signal is output to the pixel circuit module, so that the pixel circuit module uses the row driving unit and the column driving unit to perform display control of the sub-pixel unit according to the gate enable signal.

[0038] The reason why the video source data is deformed is that different displays and display methods have specific requirements on the format of data, and the video source data needs to be processed into a format that meets the display requirements.

[0039] The dimming module is used to generate a dimming signal according to a dimming command. The dimming signal includes a grayscale quantization refresh signal and a global coordination pulse signal.

[0040] In this embodiment, the dimming module can generate a dimming signal according to the dimming command, and the generated dimming signal is output to the pixel circuit module for digital-to-analog conversion to obtain an analog voltage, thereby cooperating to control the display of the sub-pixel unit selected by the row driving unit and the column driving unit.

[0041] Optionally, the dimming signal may include a grayscale quantization refresh signal and a global cooperative control pulse signal. Different driving level combinations can be achieved by combining the grayscale quantization refresh signal and the global cooperative control pulse signal. The grayscale quantization refresh signal is used to control the voltage to complete the grayscale conversion, and the global cooperative control pulse signal is used as a global signal to increase or decrease the pulse width, that is, the display duration of the display material, to increase or decrease the overall display brightness.

[0042] The pixel circuit module is used to turn on at least one target sub-pixel unit among the plurality of sub-pixel units through a row driving unit and a column driving unit according to a received gate enable signal.

[0043] The pixel circuit module is used to complete the digital-to-analog conversion of the column data in the column driving unit, obtain the analog voltage, and charge the pixel capacitors of the sub-pixel unit R, sub-pixel unit G, and sub-pixel unit B at the corresponding column position. Since the column selection signal controls all the sub-pixel units on a column, combined with the row selection control of the row selection signal, independent control of each sub-pixel unit can be achieved to complete display and refresh.

[0044] The row selection signal may be a signal sequence, which indicates the control order of each row of sub-pixel units. The column selection signal may include a digital voltage signal corresponding to each sub-pixel unit.

[0045] The row driving unit is used to determine the target row to be controlled according to the row selection signal; the column driving unit is used to turn on each sub-pixel unit in the target row according to the column selection signal in different time periods. The sub-pixel unit turned on by the row driving unit and the column driving unit is used as the target sub-pixel unit.

[0046] In some embodiments, the row driving unit can determine the target row to be controlled according to the row selection signal, and the column driving unit can first convert the digital voltage signal corresponding to each sub-pixel unit into an analog voltage according to the column selection signal, and then turn on each sub-pixel unit in the target row in time periods according to the target row to be controlled.

[0047] The pixel circuit module is also used to control the display driving circuit corresponding to each target sub-pixel unit to be turned on according to the dimming signal, so as to drive the display material corresponding to the target sub-pixel unit to display.

[0048] In some embodiments, during the process of turning on the target sub-pixel unit, the column driving unit can control the charging of the pixel capacitor in each target sub-pixel unit according to the grayscale quantization refresh signal and the analog voltage corresponding to each turned-on target sub-pixel unit to complete the grayscale conversion, and after the charging is completed, the display time of the display material of each target sub-pixel unit is controlled by the global coordination pulse signal, thereby adjusting the display screen brightness of the display to the visual comfort zone of the human eye, which not only ensures that the color of the displayed picture does not deviate, but also makes the grayscale transition more uniform, thereby improving the display efficiency.

[0049] In summary, the micro display dimming system provided in this embodiment includes: a dimming configuration module, an encoding and strobe enabling module, a dimming module and a pixel circuit module; the encoding and strobe enabling module is connected to the dimming configuration module, and the encoding and strobe enabling module is connected to the pixel circuit module; the dimming module is respectively connected to the dimming configuration module and the pixel circuit module; the pixel circuit module includes: a row driving unit, a column driving unit and a pixel circuit; the pixel circuit includes: a plurality of sub-pixel units; the dimming configuration module is used to receive a dimming command; the dimming command is used to indicate a dimming mode or brightness adjustment information; the encoding and strobe enabling module is used to adjust the brightness according to the dimming configuration module. The command encodes the input video source data to generate deformed data and a selection enable signal corresponding to the deformed data; the dimming module is used to generate a dimming signal according to the dimming command, and the dimming signal includes: a grayscale quantization refresh signal and a global coordination pulse signal; the pixel circuit module is used to turn on at least one target sub-pixel unit among multiple sub-pixel units through a row drive unit and a column drive unit according to the received selection enable signal; the pixel circuit module is also used to control the display drive circuit corresponding to each target sub-pixel unit to be turned on according to the dimming signal, so as to drive the display material corresponding to the target sub-pixel unit to display. This system introduces a dimming configuration module and a dimming module, so that the dimming module can generate the required dimming signal for dimming control according to the dimming command input by the dimming configuration module, wherein the grayscale quantization refresh signal and the global co-control pulse signal are combined as the dimming signal, the grayscale quantization refresh signal is used to control the voltage to complete the grayscale conversion, and the global co-control pulse signal is used as a global signal to enhance or weaken the overall display brightness by controlling the display time of the display material, thereby adjusting the display screen brightness of the display to the visual comfort zone of the human eye, which not only ensures that the color of the display screen does not deviate, but also makes the grayscale transition more uniform, thereby improving the display efficiency.

[0050] Figure 2 A schematic diagram of another micro display dimming system provided in an embodiment of the present application is shown in FIG. Figure 2As shown, the dimming configuration module may include: an automatic dimming configuration interface module and a manual dimming configuration interface module. The automatic dimming configuration interface module is used to receive a dimming command sent by a host computer; the host computer can detect the ambient brightness information, and determine the display brightness that the display should be adjusted to according to the current display brightness of the display and the ambient brightness information, so that the host computer can generate a dimming command, and the dimming command may include: the current brightness information of the display and the display brightness information to be adjusted.

[0051] The manual dimming configuration interface module is used to receive the dimming command manually input by the user; the user can manually input the dimming command according to the display requirements. In the manual mode, not only can the dimming command generation in the automatic mode be realized, but also the input of the dimming mode can be supported. The dimming mode may include: maintaining the refresh rate and reducing the resolution or maintaining the resolution and reducing the refresh rate.

[0052] Continue to refer Figure 2 The system may further include: a dimming strategy module; the dimming strategy module is respectively connected to the dimming configuration module and the encoding and gating enable module.

[0053] The dimming strategy module is used to identify the dimming command and determine the dimming strategy indicated by the dimming command.

[0054] Optionally, the dimming strategy module is used to determine the corresponding dimming strategy according to the input dimming command. The implementation principle of the dimming strategy module is similar to that of a multi-select switch. Each switch correspondingly turns on a dimming strategy. The dimming strategy module can turn on the corresponding switch according to the dimming command, thereby outputting the corresponding dimming strategy.

[0055] The encoding and gating enable module is specifically used to encode the video source data according to the dimming strategy, and generate deformed data and a gating enable signal corresponding to the deformed data.

[0056] In some embodiments, the encoding and gating enable module may encode the input video source data according to the dimming strategy determined by the dimming strategy module, and output the transformed data and the gating enable signal corresponding to the transformed data.

[0057] Optionally, the dimming module is specifically used to generate a grayscale quantization refresh signal and a global co-control pulse signal according to the dimming strategy, and the global co-control pulse signal includes: a pulse signal duty cycle and a signal flipping frequency; the grayscale quantization refresh signal is used to control the voltage size to complete the grayscale conversion of the target sub-pixel unit; the global co-control pulse signal is used to control the display time of the display material of the target sub-pixel unit.

[0058] Figure 3A dimming timing diagram provided in an embodiment of the present application. Grayscale quantization refresh signal is used to control grayscale conversion. For example, the 8-bit 256 grayscale display with a maximum of 5V and a minimum of 0V is used. The voltage difference is 5V. The linear resistor string is used for average division, and the display accuracy can be 5 / 256 V. When the display brightness needs to be reduced to 80% according to the dimming strategy, the maximum is adjusted to 4V and the minimum is 0V. The voltage difference is 4V. The linear resistor string is used for average division, and the display accuracy can be 4 / 256 V. The brightness of 128 grayscale display is equivalently reduced from (128x5) / 256 to (128x4) / 256. When the dimming range is large and the display brightness is reduced by 10%, if the maximum voltage is adjusted to 0.5V, the display accuracy can be 0.5 / 256 V. Considering that the display material has a turn-on voltage requirement, the turn-on voltage is set to 0.0195V. For the low grayscale part, such as 1 to 10 grayscales will be lost, resulting in grayscale loss. Therefore, there are defects in dimming using grayscale quantization refresh signal alone, such as Figure 3 shown.

[0059] In this embodiment, a global cooperative control pulse signal is introduced. This is a digital signal that cannot control the grayscale brightness conversion in the analog circuit alone, but can be used as a global signal to increase or decrease the driving time of the pixel driving part of a certain grayscale, that is, the display time of the display material, to enhance or weaken the overall luminous brightness; taking the above-mentioned 256 grayscale display with a maximum of 5V and a minimum of 0V, 8bit as an example, when the duty cycle of the global cooperative control pulse signal is 80% and the flip frequency is 2160hz (to prevent the flicker from causing discomfort to the human eye), the display accuracy can be achieved to 4 / 256 V; for the above-mentioned reduction of display brightness by 10%, if the maximum voltage is adjusted to 0.5V, the display accuracy can be achieved to 0.5 / 256 V. Continue to refer to Figure 3 Considering that the luminescent material has a turn-on voltage requirement for lighting, the turn-on voltage is set to 0.0195V. For the low grayscale part, such as 1 to 10 grayscales will be lost. In this case, the maximum voltage can be kept at 5V, the global co-control pulse signal duty cycle is 10%, and the flip frequency is 2160hz. The same effect of reducing the display brightness by 10% is achieved without losing grayscale, or the maximum voltage can be adjusted to 4V, the global co-control pulse signal duty cycle is 12.5%, and the flip frequency is 2160hz.

[0060] It can be seen that the display brightness can be adjusted to any desired brightness by combining the global coordination pulse signal with the grayscale quantization refresh signal.

[0061] Figure 4 This is a schematic diagram of a pixel circuit structure of a micro display dimming system provided in an embodiment of the present application. The display material used in this pixel circuit structure is a self-luminous liquid crystal material. Figure 4As shown, the row driving unit in the pixel circuit module is connected to one end of the first switch component in each sub-pixel unit; the other end of the first switch component is respectively connected to one end of the pixel capacitor and the first end of the second switch component; The second end of the second switch assembly is connected to the first end of the third switch assembly; A second end of the third switch component is connected to one end of the display material; The column driving unit is connected to the third end of the second switch component in each sub-pixel unit.

[0062] The circuit structure of each sub-pixel unit is the same. Taking one of the sub-pixel units as an example, the sub-pixel unit includes a first switch component, a pixel capacitor, a second switch component, a third switch component, a display material and a load switch component; wherein the row driving unit is connected to one end of the first switch component of the sub-pixel unit, and the other end of the first switch component is respectively connected to one end of the pixel capacitor and the first end of the second switch component; the second end of the second switch component is connected to the first end of the third switch component; the second end of the third switch component is connected to one end of the display material, and the first end of the third switch component is also connected to the load switch component; the column driving unit is connected to the third end of the second switch component in each sub-pixel unit.

[0063] The grayscale quantization refresh signal is input through the third end of the second switch component to charge the pixel capacitor of the sub-pixel unit; the global coordination pulse signal is input through the third end of the third switch component.

[0064] Optionally, the row driving unit is used to determine the target row to be turned on according to the row driving signal in the enable signal; the column driving unit is used to turn on each target sub-pixel unit in the target row according to the column driving signal in the enable signal, and charge the pixel capacitor of each target sub-pixel unit through the grayscale quantization refresh signal, and when the charging voltage of the pixel capacitor reaches a preset voltage, control the conduction or closing of the third switch component in each target sub-pixel unit through the global coordination pulse signal to drive the display material corresponding to each target sub-pixel unit to display.

[0065] Optionally, the dimming module is specifically used to determine the grayscale quantization refresh signal according to the dimming strategy; determine the voltage difference information according to the grayscale quantization refresh signal; and determine the pulse signal duty cycle in the global cooperative control pulse signal according to the voltage difference information and the brightness adjustment information. The voltage difference information refers to the voltage difference between the highest voltage and the lowest voltage of the driving voltage.

[0066] Continue to refer Figure 4After the row driving unit determines the target row to be turned on, the column driving unit can turn on the target sub-pixel units in the target row in sequence. For a target sub-pixel unit that is currently turned on, the pixel capacitor in the target sub-pixel unit can be charged by a grayscale quantization refresh signal. When the charging voltage reaches the voltage corresponding to the required grayscale value, the charging is stopped. At this time, the first switch component is disconnected, and the pixel capacitor charges the display material of the target sub-pixel unit by discharging to control the display material to display according to the required brightness level. In this process, the conduction or closing of the third switch component in the target sub-pixel unit can be controlled by the global coordination pulse signal, thereby controlling the display time of the display material of the target sub-pixel unit to achieve the purpose of display brightness adjustment.

[0067] The global cooperative control pulse signal may include: the duty cycle of the global cooperative control pulse signal and the signal flip frequency. In some embodiments, the duty cycle of the global cooperative control pulse signal can be determined according to the dimming signal. Assuming that the voltage difference between the highest voltage and the lowest voltage of the driving voltage in the pixel circuit is a is 100%, the full brightness is q, and the brightness needs to be dimmed to p, the voltage difference can be kept unchanged. At this time, the duty cycle of the global cooperative control pulse signal is adjusted to p / q. When the voltage difference is adjusted to b, the duty cycle of the global cooperative control pulse signal needs to be adjusted to (a / q). p) / (b q).

[0068] Since the full brightness is q at the full pressure difference a, and the brightness p is to be achieved at the new pressure difference b, we can assume that there is a coefficient k that is inversely proportional to the pressure difference (this coefficient actually depends on the specific relationship between the pressure difference and the brightness), such that: p = k b (New Duty Cycle) At the same time, we know that the brightness is q at full voltage difference a and full duty cycle (ie 1), so we have: q = k a 1 Substituting the second equation into the first to solve for the new duty cycle, we get: New duty cycle = (p / q) (a / b) = (a p) / (b q).

[0069] In addition, the signal flip frequency can be adjusted according to the comfort of the human eye, and both the maximum voltage and the minimum voltage can be adjusted.

[0070] The signal flip frequency refers to the number of times the signal flips within a signal cycle. A group of pulse signals consisting of a high level and a low level, one flip corresponds to a group of pulse signals, the higher the signal flip frequency, the more pulse signals are included.

[0071] In some embodiments, the global co-control pulse signal is introduced after the grayscale quantization refresh signal has charged the pixel capacitor, avoiding interference with the charging process caused by the rising or falling switching of the global co-control pulse signal. This is different from the previous method of adding a constant current DC / DC converter that can quickly control the current on the basis of the DC constant voltage source, or adding a PWM chopper switch to the constant current power supply output. PWM dimming causes color deviation, uneven grayscale transition and other problems, especially under low brightness.

[0072] Optionally, since the rising or falling switching of the dimming signal is random, in order to avoid interference caused by the charging process of adjacent rows or close rows, resulting in inconsistent display grayscale, in this embodiment, the dimming signal generated by the dimming module can be output by row.

[0073] Of course, the interference of charging process between adjacent rows can also be reduced by any of the following methods: Synchronization mechanism: Design a synchronization mechanism to ensure that the dimming signal is output row by row. This can be achieved by using a row synchronization signal or a timer. The synchronization mechanism can ensure that each row of pixels is only affected by the dimming signal of this row when charging, thereby avoiding interference between adjacent rows.

[0074] De-jittering: De-jittering is performed on the dimming signal to reduce the transient noise caused by signal switching. De-jittering can be achieved by introducing a short delay time after the signal switching to ensure that the signal is stable before subsequent operations.

[0075] Signal smoothing: Smoothing the dimming signal to reduce sudden changes when the signal switches. Smoothing can be achieved by using filters or interpolation algorithms to make the dimming signal smoother when switching, thereby reducing interference with the charging process of adjacent rows.

[0076] Inter-row isolation: In hardware design, you can consider adding inter-row isolation measures, such as using physical barriers or increasing the row spacing, etc. These measures can further reduce the electrical interference between adjacent rows and improve display quality.

[0077] Software optimization: In the software algorithm, the generation and output logic of the dimming signal can be optimized to reduce the impact of randomness on the display quality. For example, a prediction algorithm can be used to calculate and output the dimming signal in advance to avoid interference during the charging process of adjacent rows.

[0078] Optionally, if the dimming command indicates a dimming mode, the dimming strategy module determines the dimming strategy corresponding to the dimming mode according to the dimming mode, and pre-processes the pixel circuit module according to the dimming strategy; the dimming modes include: maintaining resolution and reducing refresh rate or maintaining refresh rate and increasing resolution.

[0079] In some embodiments, when the dimming command indicates a dimming mode, the dimming strategy module may further pre-process the pixel circuit module according to the dimming mode to reduce the amount of data processing of the encoding and gating enable modules.

[0080] In the dimming mode of maintaining resolution and reducing refresh rate or maintaining refresh rate and increasing resolution, it is possible that only some or all of the sub-pixel units in some rows or some columns are turned on in a frame. In this case, the dimming strategy module can first pre-process the row and column data in the pixel circuit module according to the dimming strategy, retain only the information of some rows or columns, and output the pre-processed information to the pixel circuit module. In this way, the pixel circuit module only processes and controls the signals of the sub-pixel units in the remaining rows or columns.

[0081] Optionally, if the dimming mode is to maintain resolution and reduce refresh rate, the dimming strategy module determines the number of sub-frames to be divided into for each frame and the number of rows and columns to be displayed in each sub-frame in the pixel circuit module based on the original resolution, the original refresh rate and the refresh rate to be displayed.

[0082] In some embodiments, for the dimming mode of maintaining resolution and reducing refresh rate, the original resolution is set to r c, the original refresh rate is m, and the refresh rate to be displayed is n, then the source frame needs to be divided into mn sub-frames for display, and the number of rows and columns displayed each time is (r c) / (m / n), the division method is not limited.

[0083] Figure 5 This is a working principle diagram of a scenario of maintaining resolution and reducing refresh rate provided by an embodiment of the present application. In the application scenario of maintaining resolution and reducing refresh rate, a frame of the video source is divided into two frames for display. Figure 5 Taking two frames as an example, (0,0) represents the position of the sub-pixel unit in the 1st row and the 1st column, (0,1919) represents the position of the sub-pixel unit in the 1st row and the 1920th column, (1079,0) represents the position of the sub-pixel unit in the 1080th row and the 1st column, and (1079,1919) represents the position of the sub-pixel unit in the 1080th row and the 1920th column. The first frame is odd rows, odd columns, even rows and even columns, and the second frame is odd rows, even columns, even rows and odd columns, displayed alternately, the refresh rate is reduced to 180hz, and the resolution is still 1920x1080; the frame method and number are variable.

[0084] Optionally, if the dimming mode is to maintain refresh rate and reduce resolution, the dimming strategy module divides multiple sub-pixel units into regions according to the original resolution and the resolution to be displayed, obtains multiple groups of pixel units, and determines the number of sub-pixel units to be displayed in each group of pixel units.

[0085] In some other embodiments, for the dimming mode of maintaining refresh rate and reducing resolution, the original resolution is set to r c, the original refresh rate is m, and the resolution to be displayed is r c / j, one sub-pixel unit out of every j sub-pixel units in a source frame needs to be used to display the information of these j sub-pixel units, wherein the position of the one sub-pixel unit used for display in the j sub-pixel units is not limited, and the method for determining the one sub-pixel unit used for display in the i sub-pixel units is not limited.

[0086] Figure 6 A working principle diagram for a scenario of maintaining refresh rate and reducing resolution provided by an embodiment of the present application. In the application scenario of maintaining refresh rate and reducing resolution, a 2x2 rectangular window is used to slide through all sub-pixel units, and only one sub-pixel unit in the rectangular window is displayed each time. The black filled box in the figure represents the sub-pixel unit that is lit, and the rest are sub-pixel units that are not lit. Taking 1920x1080 resolution as an example, (0,0) represents the position of the sub-pixel unit in the first row and the first column, (0,1918) represents the position of the sub-pixel unit in the first row and the 1919th column, and so on. (1079,1919) represents the position of the sub-pixel unit in the 1080th row and the 1920th column. The position of the lit sub-pixel unit in this figure is an odd row and an odd column. Since only one sub-pixel unit among the four sub-pixel units is lit, the brightness of the picture is reduced to 1 / 4 of the original, and the resolution is also reduced to 1 / 4 of the original, and the refresh rate is still 360hz; the size of the rectangular window and the number and position of the sub-pixel units selected to be lit in the window are variable.

[0087] Figure 7 A schematic diagram of a dimming effect provided in an embodiment of the present application. Assuming that the driving voltage difference is 5V when the system is normally at full brightness, and now the brightness needs to be adjusted to 40% of the full brightness, Figure 7 In (a), the lighted area 1 represents the effect diagram of adjustment using the conventional method. The driving voltage difference is adjusted to 2V, the display duration is 1 frame, and the area enclosed by the xy axis is equivalent to the display brightness L1.

[0088] Figure 7 In (b), the lit area 2 represents the effect diagram of the adjustment using the method of the present application, where the driving voltage difference is maintained at 5V, the duty cycle of the global cooperative pulse signal is 40%, the flip frequency is 2160hz, the display duration is 1 frame, and the area enclosed by the xy axis is equivalent to the display brightness L2.

[0089] Figure 7 In (c), the lit area 3 represents another effect diagram of the adjustment using the method of the present application, where the driving voltage difference is adjusted to 4V, the duty cycle of the global cooperative pulse signal is 50%, the flip frequency is 2160hz, the display duration is 1 frame, and the area enclosed by the xy axis is equivalent to the display brightness L3. Among them, L1= L2= L3.

[0090] Figure 8 A schematic diagram of the pixel circuit structure of another micro-display dimming system provided in an embodiment of the present application. The display material used in this pixel circuit structure is a non-self-luminous liquid crystal material. That is, the method of the present application can be used for both self-luminous liquid crystal materials, where self-luminous materials include but are not limited to: LED (light emitting diode), OLED (organic light emitting diode), micro LED (micro light emitting diode) and Q-LED (quantum dot light emitting diode), and non-self-luminous liquid crystal materials.

[0091] Self-luminous means that the material itself has the ability to emit light, and can emit light without an external light source. Non-self-luminous liquid crystal material refers to a liquid crystal material that does not have the ability to emit light itself and requires an external light source (such as a backlight module) to achieve display. Figure 4 The difference is that Figure 8 In the pixel circuit structure, the basic circuit connections and the components and Figure 4 To distinguish the two capacitors, the pixel capacitor connected to the first switch component may be referred to as a first pixel capacitor, and the pixel capacitor replacing the display material may be referred to as a second pixel capacitor.

[0092] The voltage difference result is obtained by subtracting the applied common voltage VCOM from the voltage of the first pixel capacitor. When there is a voltage difference between VCOM and the first pixel capacitor, the non-self-luminous liquid crystal material can be displayed, and when there is no voltage difference between VCOM and the first pixel capacitor, the non-self-luminous liquid crystal material does not display.

[0093] Fig. 9 A schematic diagram of a pixel circuit structure of another micro-display dimming system provided in an embodiment of the present application is shown in FIG. Figure 4 as well as Figure 8 The pixel circuit structure belongs to the analog pixel structure, while Fig. 9 What is shown is a digital pixel structure, that is, this solution can be used to introduce digital signals into an analog pixel circuit structure for dimming, and can also be used to introduce analog signals into a digital pixel circuit structure for dimming.

[0094] like Fig. 9As shown, taking a sub-pixel unit as an example, it includes a first inverter, a second inverter, a fourth switch component, a fifth switch component and a sixth switch component; the column driving unit is respectively connected to the first end of the fourth switch component and the first end of the fifth switch component, the row driving unit is respectively connected to the second end of the fourth switch component and the second end of the fifth switch component, the third end of the fourth switch component is connected to the input end of the first inverter, the third end of the fourth switch component is also connected to the output end of the second inverter, the third end of the fifth switch component is connected to the output end of the first inverter, and the third end of the fifth switch component is also connected to the input end of the second inverter; the first end of the sixth switch component is used to input the global coordination pulse signal, and the second end of the sixth switch component is respectively connected to the input end of the first inverter and the third end of the fourth switch component.

[0095] In principle, the voltage remains unchanged, and the grayscale conversion is performed by controlling the PWM (Pulse Width Modulation) duration. The grayscale quantization refresh signal VDDA can be selected as multi-level. The PWM signal is normally connected to the column drive line, and the global co-control pulse signal is connected to one end of the pixel electrode, which can realize the brightness adjustment of the common cathode self-luminous material.

[0096] Among them, PWM is a digital encoding method for analog signal levels, which converts a time signal with amplitude changes into a signal with pulse width changes. This technology controls the average output of the analog circuit by adjusting the duty cycle of the pulse signal (the ratio of pulse width to pulse period). Specifically, it indirectly controls the average voltage or current level of the output signal by changing the duration of the high level (or low level) within a fixed period.

[0097] Fig.10 Schematic diagram of a dimming method provided in an embodiment of the present application. This method can be applied to the pixel circuit module in the micro display dimming system of the above embodiment, such as Fig.10 As shown, the method may include: S101, receiving a gating enable signal and a dimming signal.

[0098] The dimming signal includes a grayscale quantization refresh signal and a global coordination pulse signal.

[0099] S102 , according to a gate enable signal, turning on a target sub-pixel unit among the plurality of sub-pixel units through a row driving unit and a column driving unit.

[0100] S103 , controlling the display driving circuit corresponding to the target sub-pixel unit to be turned on according to the dimming signal, so as to drive the display material corresponding to the target sub-pixel unit to display.

[0101] It is worth noting that the implementation principles of the above-mentioned method steps and the corresponding effects have been described in detail in the above-mentioned system introduction and will not be repeated here.

[0102] In summary, the micro display dimming system provided in this embodiment includes: a dimming configuration module, an encoding and strobe enabling module, a dimming module and a pixel circuit module; the encoding and strobe enabling module is connected to the dimming configuration module, and the encoding and strobe enabling module is connected to the pixel circuit module; the dimming module is respectively connected to the dimming configuration module and the pixel circuit module; the pixel circuit module includes: a row driving unit, a column driving unit and a pixel circuit; the pixel circuit includes: a plurality of sub-pixel units; the dimming configuration module is used to receive a dimming command; the dimming command is used to indicate a dimming mode or brightness adjustment information; the encoding and strobe enabling module is used to adjust the brightness according to the dimming configuration module. The command encodes the input video source data to generate deformed data and a selection enable signal corresponding to the deformed data; the dimming module is used to generate a dimming signal according to the dimming command, and the dimming signal includes: a grayscale quantization refresh signal and a global coordination pulse signal; the pixel circuit module is used to turn on at least one target sub-pixel unit among multiple sub-pixel units through a row drive unit and a column drive unit according to the received selection enable signal; the pixel circuit module is also used to control the display drive circuit corresponding to each target sub-pixel unit to be turned on according to the dimming signal, so as to drive the display material corresponding to the target sub-pixel unit to display. This system introduces a dimming configuration module and a dimming module, so that the dimming module can generate the required dimming signal for dimming control according to the dimming command input by the dimming configuration module, wherein the grayscale quantization refresh signal and the global co-control pulse signal are combined as the dimming signal, the grayscale quantization refresh signal is used to control the voltage to complete the grayscale conversion, and the global co-control pulse signal is used as a global signal to enhance or weaken the overall display brightness by controlling the display time of the display material, thereby adjusting the display screen brightness of the display to the visual comfort zone of the human eye, which not only ensures that the color of the display screen does not deviate, but also makes the grayscale transition more uniform, thereby improving the display efficiency.

[0103] It is worth noting that some modules in the above system may be one or more integrated circuits configured to implement the above method, such as one or more application specific integrated circuits (ASIC), or one or more digital singnal processors (DSP), or one or more field programmable gate arrays (FPGA). For another example, when a certain module above is implemented in the form of a processing element scheduling program code, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0104] The above modules can be connected or communicated with each other via a wired connection or a wireless connection. The wired connection may include a metal cable, an optical cable, a hybrid cable, etc., or any combination thereof. The wireless connection may include a connection in the form of a LAN, a WAN, Bluetooth, a ZigBee, or NFC, or any combination thereof. Two or more modules may be combined into a single module, and any one module may be divided into two or more units. Those skilled in the art will clearly understand that for the convenience and simplicity of description, the specific working process of the system and device described above can refer to the corresponding process in the method embodiment, and will not be repeated in this application.

[0105] Fig.11 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application, wherein the electronic device is used to execute the above-mentioned dimming method.

[0106] The device may include: a processor 801 and a storage medium 802 .

[0107] The storage medium 802 is used to store programs, and the processor 801 calls the programs stored in the storage medium 802 to execute the above method embodiment. The specific implementation method and technical effect are similar and will not be repeated here.

[0108] The storage medium 802 stores program codes. When the program codes are executed by the processor 801, the processor 801 executes various steps of the dimming method according to various exemplary embodiments of the present application described in the above “Exemplary Method” section of this specification.

[0109] The processor 801 may be a general-purpose processor, such as a central processing unit (CPU), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and may implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0110] The storage medium 802, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer executable programs and modules. The storage medium may include at least one type of storage medium, for example, a flash memory, a hard disk, a multimedia card, a card-type storage medium, a random access storage medium (Random Access Memory, RAM), a static random access storage medium (Static Random Access Memory, SRAM), a programmable read-only storage medium (Programmable Read Only Memory, PROM), a read-only storage medium (Read Only Memory, ROM), an electrically erasable programmable read-only storage medium (Electrically Erasable Programmable Read-Only Memory, EEPROM), a magnetic storage medium, a disk, an optical disk, and the like. The storage medium is any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer, but is not limited thereto. The storage medium 802 in the embodiment of the present application can also be a circuit or any other device that can realize a storage function, for storing program instructions and / or data.

[0111] Optionally, the present application also provides a program product, such as a computer-readable storage medium, including a program, which is used to execute the above method embodiment when executed by a processor.

[0112] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0113] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0114] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0115] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to perform some steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only storage medium (English: Read-Only Memory, referred to as: ROM), random access storage medium (English: Random Access Memory, referred to as: RAM), disk or optical disk and other media that can store program codes.

Claims

1. A micro display dimming system, characterized in that: include: A dimming configuration module, a coding and gating enabling module, a dimming module and a pixel circuit module; the coding and gating enabling module is connected to the dimming configuration module, and the coding and gating enabling module is connected to the pixel circuit module; the dimming module is respectively connected to the dimming configuration module and the pixel circuit module; The pixel circuit module includes: a row driving unit, a column driving unit and a pixel circuit; the pixel circuit includes: a plurality of sub-pixel units; The dimming configuration module is used to receive a dimming command; the dimming command is used to indicate a dimming mode or brightness adjustment information; The encoding and strobe enable module is used to encode the input video source data according to the dimming command to generate deformed data and a strobe enable signal corresponding to the deformed data; The dimming module is used to generate a dimming signal according to the dimming command, and the dimming signal includes: a grayscale quantization refresh signal and a global coordination pulse signal; The pixel circuit module is used to turn on at least one target sub-pixel unit among the plurality of sub-pixel units through the row driving unit and the column driving unit according to the received gate enable signal; The pixel circuit module is also used to control the display driving circuit corresponding to each of the target sub-pixel units to be turned on according to the dimming signal, so as to drive the display material corresponding to the target sub-pixel unit to display.

2. The micro display dimming system according to claim 1, characterized in that: Also includes: A dimming strategy module; the dimming strategy module is connected to the dimming configuration module and the code and gating enable module respectively; The dimming strategy module is used to identify the dimming command and determine the dimming strategy indicated by the dimming command; The encoding and gating enable module is specifically used to encode the video source data according to the dimming strategy to generate deformed data and a gating enable signal corresponding to the deformed data.

3. The micro display dimming system according to claim 2, characterized in that: The dimming module is specifically used to generate a grayscale quantization refresh signal and a global co-control pulse signal according to the dimming strategy, and the global co-control pulse signal includes: a pulse signal duty cycle and a signal flipping frequency; the grayscale quantization refresh signal is used to control the voltage size to complete the grayscale conversion of the target sub-pixel unit; the global co-control pulse signal is used to control the display time of the display material of the target sub-pixel unit.

4. The micro display dimming system according to claim 1, characterized in that: The row driving unit is connected to one end of the first switch component in each sub-pixel unit; the other end of the first switch component is respectively connected to one end of the pixel capacitor and the first end of the second switch component; The second end of the second switch component is connected to the first end of the third switch component; The second end of the third switch component is connected to one end of the display material; The column driving unit is connected to the third end of the second switch component in each sub-pixel unit.

5. The micro display dimming system according to claim 4, characterized in that: The row driving unit is used to determine the target row to be turned on currently according to the row driving signal in the gate enable signal; The column driving unit is used to turn on each target sub-pixel unit in the target row according to the column driving signal in the selection enable signal, and charge the pixel capacitor of each target sub-pixel unit through the grayscale quantization refresh signal, and when the charging voltage of the pixel capacitor reaches a preset voltage, control the conduction or closing of the third switch component in each target sub-pixel unit through the global coordination pulse signal to drive the display material corresponding to each target sub-pixel unit to display.

6. The micro display dimming system according to claim 2, characterized in that: If the dimming command indicates a dimming mode, the dimming strategy module determines a dimming strategy corresponding to the dimming mode according to the dimming mode, and pre-processes the pixel circuit module according to the dimming strategy; The dimming modes include: maintaining resolution and reducing refresh rate or maintaining refresh rate and increasing resolution.

7. The micro display dimming system according to claim 6, characterized in that: If the dimming mode is to maintain resolution and reduce refresh rate, the dimming strategy module determines the number of sub-frames to be divided into for each frame and the number of rows and columns to be displayed in each sub-frame in the pixel circuit module according to the original resolution, the original refresh rate and the refresh rate to be displayed.

8. The micro display dimming system according to claim 6, characterized in that: If the dimming mode is to maintain refresh rate and reduce resolution, the dimming strategy module divides the multiple sub-pixel units into regions according to the original resolution and the resolution to be displayed, obtains multiple groups of pixel units, and determines the number of sub-pixel units to be displayed in each group of pixel units.

9. The micro display dimming system according to claim 3, characterized in that: The dimming module is specifically used to determine the grayscale quantization refresh signal according to the dimming strategy; Determining pressure difference information according to the grayscale quantization refresh signal; The duty cycle of the pulse signal in the global cooperative control pulse signal is determined according to the pressure difference information and the brightness adjustment information.

10. A dimming method, characterized in that: A pixel circuit module used in a micro-display dimming system according to any one of claims 1 to 9, the method comprising: Receive a gating enable signal and a dimming signal; the dimming signal includes: a grayscale quantization refresh signal and a global coordination pulse signal; According to the gate enable signal, turning on a target sub-pixel unit among the plurality of sub-pixel units through the row driving unit and the column driving unit; The display driving circuit corresponding to the target sub-pixel unit is controlled to be turned on according to the dimming signal, so as to drive the display material corresponding to the target sub-pixel unit to display.

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