CN109767727B - Scanning refreshing driving method for silicon-based micro-display and display - Google Patents
Scanning refreshing driving method for silicon-based micro-display and display Download PDFInfo
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Abstract
The invention discloses a scanning refreshing driving method of a silicon-based micro-display and a display, wherein the method comprises the following steps: acquiring screen display mode configuration parameters through a display scanning configuration module, and sending the screen display mode configuration parameters to a scanning pulse start-stop controller and a scanning line generator; generating a start mark and a stop mark of the effective pulse of the scanning line by the scanning pulse start-stop controller according to the configuration parameters of the screen display mode; generating effective scanning pulse on the corresponding scanning line by the scanning line generator according to the starting mark and the ending mark of the effective pulse of the scanning line; the digital level of the effective scanning pulse of the scanning line is converted into an analog level by a level converter, and the scanning refreshing switch of the pixel row corresponding to the pixel area is started for scanning refreshing. The invention makes the refreshing mode of the pixel area of the screen body more flexible, improves the reliability of scanning line pulses in the pixel area and the stability of scanning pulse intervals among the scanning lines, and improves the display effect of the silicon-based micro display.
Description
Technical Field
The invention relates to the technical field of display control, in particular to a scanning refreshing driving method of a silicon-based micro-display and a display.
Background
The silicon-based micro display uses monocrystalline silicon as an active driving back plate, and the manufactured active organic light emitting diode display device has the advantages of small pixel size, high resolution, high integration, low power consumption, small volume, light weight and the like. The manufacturing process of the silicon-based micro display comprises the steps of firstly manufacturing a driving chip by utilizing a mature CMOS integrated circuit process, then manufacturing a light emitting device on the driving chip, and completing the driving control of a screen body by a screen body driving circuit in the driving chip.
The traditional analog GIP circuit is positioned in a non-display area of the screen body and is internally connected with the display driving chip through a flat cable. When the screen body displays and refreshes, firstly, the display driving chip drives the display refreshing time sequence waveform to the simulation GIP on the screen body through the flat cable, and the simulation GIP converts the display refreshing time sequence waveform into an effective refreshing pulse corresponding to the scanning line, thereby refreshing the image data to the pixel row of the corresponding screen body.
Traditional simulation GIP needs fixed display refreshing time sequence waveform, all pixel rows of a screen need to be refreshed in each refreshing, the refreshing mode is single, the display mode is single, if a more flexible display mode needs to be supported, the GIP circuit design is very complex, the development cost is high, and the yield is low. In addition, because of the problems of the screen body production process, the waveforms of the scanning lines generated by the analog GIP are not stable enough, the reliability is poor, and the time difference between the scanning lines is not fixed, resulting in poor display effect. The same problem occurs with silicon-based microdisplays using conventional analog GIP circuits.
Disclosure of Invention
The invention provides a scanning refreshing driving method of a silicon-based micro-display and the display, and aims to reduce the complexity of GIP development, support more scanning modes, enable the refreshing mode to be more flexible, improve the reliability of scanning lines of a screen body, stabilize the intervals of the scanning lines and improve the display effect of the screen body.
In order to achieve the above object, the present invention provides a method for driving a silicon-based microdisplay by scanning and refreshing, the method being applied to a silicon-based microdisplay, the silicon-based microdisplay comprising a digital GIP scanning and refreshing circuit, the digital GIP scanning and refreshing circuit comprising a display scanning configuration module, a scan pulse start/stop controller, a scan line generator, and a level shifter, the method comprising the steps of:
acquiring screen display mode configuration parameters through the display scanning configuration module, and sending the screen display mode configuration parameters to the scanning pulse start-stop controller, the scanning line generator and the level converter, wherein the display mode configuration parameters comprise display resolution, scanning position, scanning mode, scanning direction, scanning pulse width and scanning line simulation level working range;
generating a start mark and a stop mark of a scanning line effective pulse by the scanning pulse start-stop controller according to the screen display mode configuration parameters;
generating effective scanning pulses on corresponding scanning lines by the scanning line generator according to the starting marks and the ending marks of the effective scanning pulses of the scanning lines;
and the level converter is used for completing the conversion from the digital level of the effective scanning pulse to the analog level, and starting the scanning refreshing switch of the pixel row corresponding to the pixel area for scanning refreshing.
The invention has the further technical scheme that the Level Shifter comprises a plurality of groups of Level Shifter circuits with the same function, each group of Level Shifter circuits completes the Level shifting of one scanning line, and the number of the groups of the Level Shifter circuits is the same as the number of the effective pixel lines of the screen.
In the step of completing the conversion from the digital level of the effective scanning pulse to the analog level by the level converter and starting the scanning refresh switch of the pixel row corresponding to the pixel area to perform the scanning refresh, when the pixel circuit starts the scanning refresh, the scanning line signal works between the analog level Vgh and the analog level Vgl.
A further technical solution of the present invention is that the scan line generator includes a scan line pulse start counter and a scan line pulse stop counter, and the step of generating an effective scan pulse on a corresponding scan line by the scan line generator according to a start flag and a stop flag of the effective scan pulse of the scan line includes:
when the scanning line pulse starting counter receives the starting mark of the effective pulse, generating a scanning pulse starting edge on the corresponding scanning line according to the counting value of the scanning line pulse starting counter, and refreshing image data to the pixel row controlled by the corresponding scanning line;
when the scanning line pulse cut-off counter receives the cut-off mark of the effective pulse, according to the count value of the scanning line pulse cut-off counter, a scanning pulse cut-off edge is generated on the corresponding scanning line, and the corresponding scanning line returns to a scanning invalid state, so that one-time scanning refreshing of the pixel row corresponding to the scanning line is completed.
A further technical solution of the present invention is that the step of generating, by the scan line generator, an effective scan pulse on a corresponding scan line according to a start flag and an end flag of the effective scan pulse of the scan line further includes:
and updating the count values of the scanning line pulse starting counter and the scanning line pulse stopping counter according to the scanning mode and the scanning direction.
A further technical solution of the present invention is that the step of generating the start mark and the stop mark of the scan line effective pulse by the scan pulse start/stop controller according to the screen display mode configuration parameter includes:
and configuring the time difference of the start mark and the cut-off mark of the effective pulse of the scanning line according to the display mode.
A further technical solution of the present invention is that the scanning mode includes one of a progressive scanning mode, an interlaced scanning mode, or a multi-line scanning mode, and the scanning direction includes one of a forward scanning mode or a reverse scanning mode.
In order to achieve the above object, the present invention further provides a silicon-based microdisplay, which includes a digital GIP scanning refresh circuit, where the digital GIP scanning refresh circuit includes a display scanning configuration module, a scan pulse start/stop controller, a scan line generator, and a level shifter, where the scan control module is respectively connected to the scan pulse start/stop controller, the scan line generator, and the scan line generator is further connected to the scan pulse start/stop controller and the level shifter.
The display scanning configuration module is used for acquiring screen display mode configuration parameters and sending the screen display mode configuration parameters to the scanning pulse start-stop controller, the scanning line generator and the level converter, wherein the display mode configuration parameters comprise display resolution, scanning position, scanning mode, scanning direction, scanning pulse width and scanning line simulation level working range;
the scanning pulse starting and stopping controller is used for generating a starting mark and a stopping mark of a scanning line effective pulse according to the screen display mode configuration parameters;
the scanning line generator is used for generating effective scanning pulses on corresponding scanning lines according to the starting marks and the stopping marks of the effective scanning pulses of the scanning lines;
and the level converter is used for completing the conversion from the digital level of the effective scanning pulse to the analog level and starting the scanning refreshing switch of the pixel row corresponding to the pixel area for scanning refreshing.
The invention has the further technical scheme that the Level Shifter comprises a plurality of groups of Level Shifter circuits with the same function, wherein each group of Level Shifter circuits completes the Level shift of one scanning line, the number of the Level Shifter circuit groups is the same as the number of effective pixel lines on a screen, and the scanning line generator comprises a scanning line pulse starting counter and a scanning line pulse stopping counter;
the scanning line pulse starting counter is used for generating a scanning pulse starting edge on a corresponding scanning line according to the count value of the scanning line pulse starting counter when the starting mark of the effective pulse is received, and refreshing the image data of the source driver to the pixel row controlled by the corresponding scanning line;
and the scanning line pulse cut-off counter is used for generating a scanning pulse cut-off edge on the corresponding scanning line according to the count value of the scanning line pulse cut-off counter when the cut-off mark of the effective pulse is received, and the corresponding scanning line returns to a scanning invalid state to finish one-time scanning refreshing of the pixel row corresponding to the scanning line.
The invention has the beneficial effects that: compared with the prior art, the scanning refreshing driving method and the display of the silicon-based micro-display reduce the complexity of GIP development, can support more scanning modes, enable the refreshing mode of the pixel region of the screen body to be more flexible, improve the reliability of scanning line pulses in the pixel region and the stability of scanning pulse intervals among the scanning lines, and improve the display effect of the silicon-based micro-display.
Drawings
FIG. 1 is a schematic flow chart diagram of a preferred embodiment of a method for scanning refresh driving of a silicon-based microdisplay according to the invention;
FIG. 2 is a schematic illustration of refreshing a pixel region of a silicon-based microdisplay of the present invention;
FIG. 3 is a system configuration diagram of the digital GIP scan refresh circuit of the present invention;
fig. 4 is a diagram for generating digital GIP scan line waveforms according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to improve the display effect of the silicon-based micro-display and increase the display refresh mode to make the refresh mode more flexible, the invention provides a scanning refresh driving method of the silicon-based micro-display and a display.
Specifically, referring to fig. 1 to 4, fig. 1 is a schematic flow chart of a preferred embodiment of a method for driving a scanning refresh of a silicon-based microdisplay according to the present invention, fig. 2 is a schematic refresh diagram of a pixel region of a silicon-based microdisplay according to the present invention, fig. 3 is a system structure diagram of a digital GIP driving circuit according to the present invention, and fig. 4 is a diagram for generating waveforms of digital GIP scan lines according to the present invention.
It can be understood that the silicon-based microdisplay scanning refresh driving method of the present invention is applied to a silicon-based microdisplay, which comprises a digital GIP scanning refresh circuit, wherein the digital GIP scanning refresh circuit comprises a display scanning configuration module, a scan pulse start-stop controller, a scan line generator, and a level shifter.
The display control method of the silicon-based micro-display can be suitable for the silicon-based OLED micro-display, the silicon-based LCOS micro-display (silicon-based liquid crystal display) or other various silicon-based micro-displays. The present invention is explained in detail below using a silicon-based OLED microdisplay as an example.
In this embodiment, the method includes the steps of:
step S10, obtaining screen display mode configuration parameters through the display scan configuration module, and sending the screen display mode configuration parameters to the scan pulse start/stop controller, the scan line generator, and the level shifter, where the display mode configuration parameters include a display resolution, a scan position, a scan mode, a scan direction, a scan pulse width, and a scan line analog level working range.
Wherein the scanning mode comprises one of a progressive scanning mode, an interlaced scanning mode or a multi-line scanning mode, and the scanning direction comprises one of a forward scanning mode or a reverse scanning mode.
In specific implementation, the display configuration module may receive screen display mode configuration parameters, such as display resolution, scanning position, scanning mode, scanning direction, and the like, transmitted from the upper layer of the system, and send the relevant parameters to other modules of the system.
Step S20, the scan pulse start/stop controller generates the start flag and the stop flag of the scan line effective pulse according to the screen display mode configuration parameters.
Wherein the time difference of the start mark and the cut-off mark of the scan line effective pulse can be configured according to a display mode.
Specifically, the start mark and the stop mark of the effective pulse of the scanning line can be generated according to the refreshing requirement of the screen through the scanning pulse start-stop controller.
The scanning pulse start mark and the stop mark are in a group, the start mark is in the front, the stop mark is in the back, and the time point of starting scanning refreshing and the time length of refreshing of each scanning line are determined by the combination of the start mark and the stop mark. The time difference between the start mark and the stop mark of the same scanning line can be flexibly configured according to the display mode and the requirement of the system, and 0, 1 or a plurality of Hsyncs can be arranged between the start mark and the stop mark.
By displaying the scanning configuration, the start mark and the stop mark of the scanning pulse are generated periodically, and the position of the mark generated in each period is fixed relative to Hsync, so that the interval between adjacent marks can be kept unchanged, and the effective scanning pulse of the scanning line with stable interval can be generated.
The number of the start marks and the stop marks is determined by the total number of rows of pixels to be refreshed in one frame or one field and the number of scan lines turned on for each refresh.
The number of start and stop flags is equal to the total number of rows of pixels in a frame or field/number of scan lines that are turned on per refresh.
If the mode is a progressive scanning mode, the number of the starting marks and the ending marks is the same as the effective display line number of the panel; if the image is in an interlaced scanning mode, the number of the starting marks and the ending marks is the same as the number of effective lines of each field of display image; in the case of the multi-row scanning mode, the number of the start flags and the end flags is the total number of rows of pixels to be refreshed divided by the number of scan lines turned on per refresh data, for example, the total number of refresh rows is 1920 rows, 2 rows are turned on per refresh, that is, two adjacent rows are refreshed, and the number of the scan pulse start flags and the number of the end flags are 1920/2-960.
In step S30, the scan line generator generates an effective scan pulse on the corresponding scan line according to the start flag and the end flag of the effective scan pulse.
Specifically, the scan line generator includes a scan line pulse start counter and a scan line pulse stop counter, and when the scan line pulse start counter receives the start mark of the effective pulse, the scan line pulse start counter generates a scan pulse start edge on the corresponding scan line according to the count value of the scan line pulse start counter, and refreshes image data onto the pixel row controlled by the corresponding scan line.
When the scanning line pulse cut-off counter receives the cut-off mark of the effective pulse, according to the count value of the scanning line pulse cut-off counter, a scanning pulse cut-off edge is generated on the corresponding scanning line, and the corresponding scanning line returns to a scanning invalid state, so that one-time scanning refreshing of the pixel row corresponding to the scanning line is completed.
It is to be understood that the count values of the scan line pulse start counter and the scan line pulse off counter may be updated according to the scan mode and the scan direction.
In this embodiment, the scan line generator may receive the scan pulse start flag and the scan pulse stop flag, so as to generate an effective scan pulse on the corresponding scan line.
Two counters are inside the scan line generator: a scan line pulse start counter and a scan line pulse stop counter. As shown in fig. 3, when the scan line generator receives the scan pulse start flag, it generates a scan pulse start edge, generally a falling edge, on the corresponding scan line according to the count value of the scan line pulse start counter, and the scan line enters a scan active state, and the image data is refreshed on the pixel row controlled by the scan line. When the scan line generator receives the scan pulse off flag, it generates a scan pulse off edge, generally a rising edge, on the corresponding scan line according to the count value of the scan line pulse off counter, and the scan line returns to the scan invalid state, and the data on the corresponding pixel row remains unchanged.
The updating of the count values of the scanning line pulse starting counter and the scanning line pulse stopping counter is determined by the screen scanning refreshing mode.
For example, in the progressive scanning mode, after the scanning line pulse is generated, the count values of two counters are increased by one or decreased by one; in the interlaced scanning mode, after scanning line pulses are generated, the count values of the two counters are increased by two or decreased by two; in the multi-line scanning mode, when a scanning pulse start mark and a scanning pulse stop mark are received, the same scanning pulse is generated on two or more continuous scanning lines, the image data of the current line can be refreshed into all pixel lines which are started to be scanned simultaneously, and the increasing or decreasing values of the two counters are the same as the number of the scanning lines which are started simultaneously.
In the above scanning mode, the update of the two counter values adopts an adding operation or a subtracting operation, depending on the scanning direction of the screen, if the scanning is from a low line number to a high line number, for example, from Scan _1 to Scan _ N, the adding operation is adopted when the counter values are updated; if the scanning is from the high line number to the low line number, such as scanning from Scan _ N to Scan _1, the subtraction operation is adopted at each updating. After the scanning and refreshing of the whole display area are completed, the values of the two counters are returned to the initial values, the image data of a new frame is waited to be received, and the scanning is restarted.
If the time difference between the start mark and the end mark of the scan pulse of the same scan line is smaller than the time difference between two adjacent hsyncs, for example, as shown in fig. 4, the two counters always have the same value, so that the two counters can be simplified into one counter, in which case, the value of the counter is updated once every time a complete valid scan pulse is generated.
By configuring the scan line generator differently, the positions of the start line and the end line of the scan and the total number of lines of the scan can be set, progressive scan, interlaced scan, and copy scan of one line of data on two or more adjacent pixel lines can be supported, forward scan and reverse scan of a screen can be supported, and the like.
Step S40, the level shifter completes the conversion from the digital level to the analog level of the effective scan pulse, and the scan refresh switch of the pixel row corresponding to the pixel area is turned on for scan refresh.
When the pixel circuit turns on the scanning refresh, the scanning line signal operates between the analog level Vgh and the analog level Vgl.
It should be noted that, in this embodiment, the Level Shifter includes a plurality of sets of Level Shifter circuits with the same function, each set of Level Shifter circuits completes Level shifting of one scan line, and the number of the sets of Level Shifter circuits is the same as the number of effective pixel lines on the screen.
The method for driving the scanning and refreshing of the silicon-based micro-display can also be used for generating a display switch signal of each line of pixels of a screen, further, the effective time length of the pixel display switch signal, namely the effective time length of the light emission of the pixels can be determined by configuring the time difference between the starting mark and the ending mark of the display switch pulse, so that the control of the display brightness of the screen is realized, further, if the time difference between the starting mark and the ending mark of the display switch pulse is zero, namely the effective length of the display switch signal is zero, the corresponding pixel line is always in a display off state, and the pixel line is always pure black.
In summary, according to the above technical solution, the method for driving the scanning refresh of the silicon-based microdisplay according to the present invention obtains the screen display mode configuration parameters through the display scan configuration module, and sends the screen display mode configuration parameters to the scan pulse start/stop controller, the scan line generator, and the level shifter, where the display mode configuration parameters include the display resolution, the scan position, the scan mode, the scan direction, the scan pulse width, and the scan line analog level working range; generating a start mark and a stop mark of a scanning line effective pulse by the scanning pulse start-stop controller according to the screen display mode configuration parameters; generating effective scanning pulses on corresponding scanning lines by the scanning line generator according to the starting marks and the ending marks of the effective scanning pulses of the scanning lines; the level conversion is used for completing the conversion from the digital level of the effective scanning pulse to the analog level, the scanning refreshing switch of the pixel row corresponding to the pixel area is started for new scanning refreshing, compared with the prior art, the complexity of GIP development is reduced, more scanning modes can be supported, the refreshing mode of the pixel area of the screen body is more flexible, the reliability of scanning line pulses of the pixel area and the stability of scanning pulse intervals among scanning lines are improved, and the display effect of the silicon-based micro display is improved.
In order to achieve the above object, the present invention further provides a silicon-based microdisplay, which includes a digital GIP scanning refresh circuit, where the digital GIP scanning refresh circuit includes a display scanning configuration module, a scan pulse start/stop controller, a scan line generator, and a level converter, the scan control module is respectively connected to the scan pulse start/stop controller, the scan line generator, and the scan line generator is further connected to the scan pulse start/stop controller and the level converter.
The display scanning configuration module is configured to obtain a screen display mode configuration parameter, and send the screen display mode configuration parameter to the scanning pulse start-stop controller, the scanning line generator, and the level shifter, where the display mode configuration parameter includes a display resolution, a scanning position, a scanning mode, a scanning direction, a scanning pulse width, and a scanning line analog level working range.
The scanning mode includes one of a progressive scanning mode, an interlaced scanning mode or a multi-line scanning mode, and the scanning direction includes one of a forward scanning mode or a reverse scanning mode.
In specific implementation, the display configuration module may receive screen display mode configuration parameters, such as display resolution, scanning position, scanning mode, scanning direction, and the like, transmitted from the upper layer of the system, and send the relevant parameters to other modules of the system.
And the scanning pulse starting and stopping controller is used for generating a starting mark and a stopping mark of the scanning line effective pulse according to the screen display mode configuration parameters.
Wherein the time difference of the start mark and the cut-off mark of the scan line effective pulse can be configured according to a display mode.
Specifically, the start mark and the stop mark of the effective pulse of the scanning line can be generated according to the refreshing requirement of the screen through the scanning pulse start-stop controller.
The scanning pulse start mark and the stop mark are in a group, the start mark is in the front, the stop mark is in the back, and the time point of starting scanning refreshing and the time length of refreshing of each scanning line are determined by the combination of the start mark and the stop mark. The time difference between the start mark and the stop mark of the same scanning line can be flexibly configured according to the display mode and the requirement of the system, and 0, 1 or a plurality of Hsyncs can be arranged between the start mark and the stop mark.
By displaying the scanning configuration, the start mark and the stop mark of the scanning pulse are generated periodically, and the position of the mark generated in each period is fixed relative to Hsync, so that the interval between adjacent marks can be kept unchanged, and the effective scanning pulse of the scanning line with stable interval can be generated.
The number of the start marks and the stop marks is determined by the total number of rows of pixels to be refreshed in one frame or one field and the number of scan lines turned on for each refresh.
The number of start and stop flags is equal to the total number of rows of pixels in a frame or field/number of scan lines that are turned on per refresh.
If the mode is a progressive scanning mode, the number of the starting marks and the ending marks is the same as the effective display line number of the panel; if the image is in an interlaced scanning mode, the number of the starting marks and the ending marks is the same as the number of effective lines of each field of display image; in the case of the multi-row scanning mode, the number of the start flags and the end flags is the total number of rows of pixels to be refreshed divided by the number of scan lines turned on per refresh data, for example, the total number of refresh rows is 1920 rows, 2 rows are turned on per refresh, that is, two adjacent rows are refreshed, and the number of the scan pulse start flags and the number of the end flags are 1920/2-960.
And the scanning line generator is used for generating effective scanning pulses on the corresponding scanning lines according to the starting marks and the stopping marks of the effective scanning pulse of the scanning lines.
Specifically, the scan line generator includes a scan line pulse start counter and a scan line pulse stop counter, and when the scan line pulse start counter receives the start flag of the effective pulse, the scan line pulse start counter generates a scan pulse start edge on the corresponding scan line according to the count value of the scan line pulse start counter, and refreshes the source driver image data onto the pixel row controlled by the corresponding scan line.
When the scanning line pulse cut-off counter receives the cut-off mark of the effective pulse, according to the count value of the scanning line pulse cut-off counter, a scanning pulse cut-off edge is generated on the corresponding scanning line, and the corresponding scanning line returns to a scanning invalid state, so that one-time scanning refreshing of the pixel row corresponding to the scanning line is completed.
It is to be understood that the count values of the scan line pulse start counter and the scan line pulse off counter may be updated according to the scan mode and the scan direction.
In this embodiment, the scan line generator mainly functions to receive the scan pulse start flag and the scan pulse stop flag, so as to generate an effective scan pulse on the corresponding scan line.
Two counters are inside the scan line generator: a scan line pulse start counter and a scan line pulse stop counter. As shown in fig. 3, when the scan line generator receives the scan pulse start flag, it generates a scan pulse start edge, generally a falling edge, on the corresponding scan line according to the count value of the scan line pulse start counter, and the scan line enters a scan active state, and the image data is refreshed on the pixel row controlled by the scan line. When the scan line generator receives the scan pulse off flag, it generates a scan pulse off edge, generally a rising edge, on the corresponding scan line according to the count value of the scan line pulse off counter, and the scan line returns to the scan invalid state, and the data on the corresponding pixel row remains unchanged.
The updating of the count values of the scanning line pulse starting counter and the scanning line pulse stopping counter is determined by the screen scanning refreshing mode.
For example, in the progressive scanning mode, after the scanning line pulse is generated, the count values of two counters are increased by one or decreased by one; in the interlaced scanning mode, after scanning line pulses are generated, the count values of the two counters are increased by two or decreased by two; in the multi-line scanning mode, when a scanning pulse start mark and a scanning pulse stop mark are received, the same scanning pulse is generated on two or more continuous scanning lines, the image data of the current line can be refreshed into all pixel lines which are started to be scanned simultaneously, and the increasing or decreasing values of the two counters are the same as the number of the scanning lines which are started simultaneously.
In the above scanning mode, the update of the two counter values adopts an adding operation or a subtracting operation, depending on the scanning direction of the screen, if the scanning is from a low line number to a high line number, for example, from Scan _1 to Scan _ N, the adding operation is adopted when the counter values are updated; if the scanning is from the high line number to the low line number, such as scanning from Scan _ N to Scan _1, the subtraction operation is adopted at each updating. After the scanning and refreshing of the whole display area are completed, the values of the two counters are returned to the initial values, the image data of a new frame is waited to be received, and the scanning is restarted.
If the time difference between the start mark and the end mark of the scan pulse of the same scan line is smaller than the time difference between two adjacent hsyncs, for example, as shown in fig. 4, the two counters always have the same value, so that the two counters can be simplified into one counter, in which case, the value of the counter is updated once every time a complete valid scan pulse is generated.
By configuring the scan line generator differently, the positions of the start line and the end line of the scan and the total number of lines of the scan can be set, progressive scan, interlaced scan, and copy scan of one line of data on two or more adjacent pixel lines can be supported, forward scan and reverse scan of a screen can be supported, and the like.
And the level converter is used for finishing the conversion from the digital level of the effective scanning pulse to the analog level and starting the scanning refreshing switch of the pixel row corresponding to the pixel area for scanning refreshing. .
The Level Shifter comprises a plurality of groups of Level Shifter circuits with the same function, each group of Level Shifter circuits completes Level shifting of one scanning line, and the number of the Level Shifter circuit groups is the same as the number of the effective pixel lines of the screen.
When the pixel circuit turns on the scanning refresh, the scanning line signal operates between the analog level Vgh and the analog level Vgl.
In addition, it should be noted that the digital GIP can be used to generate display switch signals for each row of pixels on a silicon-based microdisplay screen using the method of the present invention. When the display switch signal is effective, the corresponding pixel row emits light normally; when the display switch signal is invalid, the corresponding pixel row does not emit light and is displayed as pure black. Furthermore, by configuring the time difference between the start mark and the stop mark of the display switch pulse, the effective time length of the pixel display switch signal, namely the effective time length of the pixel light emission, can be determined, thereby realizing the control of the screen display brightness. Further, if the time difference between the start mark and the stop mark of the display switch pulse is zero, that is, the effective length of the display switch signal is zero, the corresponding pixel row is always in the display off state, and the pixel row is always pure black.
In summary, according to the OLED microdisplay of the present invention, with the above technical solution, the OLED microdisplay includes a digital GIP scanning refresh circuit, where the digital GIP scanning refresh circuit includes a display scanning configuration module, a scan pulse start-stop controller, a scan line generator, and a level converter, where the scan control module is connected to the scan pulse start-stop controller, the scan line generator, and the scan line generator is further connected to the scan pulse start-stop controller and the level converter, so that compared with the prior art, complexity of GIP development is reduced, more scan modes can be supported, refresh modes of a screen pixel area are more flexible, reliability of scan line pulses in the pixel area and stability of scan pulse intervals between scan lines are improved, and display effect of a silicon-based microdisplay is improved.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structures or flow transformations made by the present specification and drawings, or applied directly or indirectly to other related arts, are included in the scope of the present invention.
Claims (9)
1. A silicon-based microdisplay scanning refresh driving method, applied to a silicon-based microdisplay, the silicon-based microdisplay comprising a digital GIP scanning refresh circuit, the digital GIP scanning refresh circuit comprising a display scanning configuration module, a scan pulse start and stop controller, a scan line generator, and a level shifter, the method comprising the steps of:
acquiring screen display mode configuration parameters through the display scanning configuration module, and sending the screen display mode configuration parameters to the scanning pulse start-stop controller, the scanning line generator and the level converter, wherein the display mode configuration parameters comprise display resolution, scanning position, scanning mode, scanning direction, scanning pulse width and scanning line simulation level working range;
generating a start mark and a stop mark of a scanning line effective pulse by the scanning pulse start-stop controller according to the screen display mode configuration parameters;
generating effective scanning pulses on corresponding scanning lines by the scanning line generator according to the starting marks and the ending marks of the effective scanning pulses of the scanning lines;
and the level converter is used for completing the conversion from the digital level of the effective scanning pulse to the analog level, and starting the scanning refreshing switch of the pixel row corresponding to the pixel area for scanning refreshing.
2. The method of claim 1, wherein the Level Shifter comprises a plurality of sets of Level Shifter circuits with the same function, each set of Level Shifter circuits completes Level shifting of one scan line, and the number of the sets of Level Shifter circuits is the same as the number of effective pixel rows on the screen.
3. The method of claim 2, wherein in the step of performing digital level to analog level conversion of the active scan pulse by the level shifter, and turning on the scan refresh switches of the pixel rows corresponding to the pixel regions for scan refresh, the scan line signal operates between an analog level Vgh and an analog level Vgl when the pixel circuits are turned on for scan refresh.
4. The method of claim 1, wherein the scan line generator comprises a scan line pulse start counter and a scan line pulse stop counter, and the step of generating by the scan line generator a valid scan pulse on a corresponding scan line according to the start flag and the stop flag of the scan line valid pulse comprises:
when the scanning line pulse starting counter receives the starting mark of the effective pulse, generating a scanning pulse starting edge on a corresponding scanning line according to the counting value of the scanning line pulse starting counter, and refreshing the image data of a source driver to a pixel row controlled by the corresponding scanning line;
when the scanning line pulse cut-off counter receives the cut-off mark of the effective pulse, according to the count value of the scanning line pulse cut-off counter, a scanning pulse cut-off edge is generated on the corresponding scanning line, and the corresponding scanning line returns to a scanning invalid state, so that one-time scanning refreshing of the pixel row corresponding to the scanning line is completed.
5. The method of claim 4, wherein the step of generating by the scan line generator valid scan pulses on corresponding scan lines according to the start flag and the end flag of the scan line valid pulses further comprises:
and updating the count values of the scanning line pulse starting counter and the scanning line pulse stopping counter according to the scanning mode and the scanning direction.
6. The method of claim 1, wherein the step of generating by the scan pulse start-stop controller a start flag and an end flag of a scan line valid pulse according to the screen display mode configuration parameters comprises:
and configuring the time difference of the start mark and the cut-off mark of the effective pulse of the scanning line according to the display mode.
7. A silicon-based microdisplay scan refresh driving method according to any of claims 1-6 in which the scanning mode comprises one of a progressive scan mode, an interlaced scan mode, or a multi-line scan mode and the scanning direction comprises one of a forward scan or a reverse scan.
8. A silicon-based micro display is characterized by comprising a digital GIP scanning refreshing circuit, wherein the digital GIP scanning refreshing circuit comprises a display scanning configuration module, a scanning pulse starting and stopping controller, a scanning line generator and a level converter, the display scanning configuration module is respectively connected with the scanning pulse starting and stopping controller, the scanning line generator and the level converter, and the scanning line generator is also connected with the scanning pulse starting and stopping controller and the level converter;
the display scanning configuration module is used for acquiring screen display mode configuration parameters and sending the screen display mode configuration parameters to the scanning pulse start-stop controller, the scanning line generator and the level converter, wherein the display mode configuration parameters comprise display resolution, scanning position, scanning mode, scanning direction, scanning pulse width and scanning line simulation level working range;
the scanning pulse starting and stopping controller is used for generating a starting mark and a stopping mark of a scanning line effective pulse according to the screen display mode configuration parameters;
the scanning line generator is used for generating effective scanning pulses on corresponding scanning lines according to the starting marks and the stopping marks of the effective scanning pulses of the scanning lines;
and the level converter is used for completing the conversion from the digital level of the effective scanning pulse to the analog level and starting the scanning refreshing switch of the pixel row corresponding to the pixel area for scanning refreshing.
9. The silicon-based microdisplay of claim 8 in which the Level Shifter comprises sets of functionally identical Level Shifter circuits, wherein each set of Level Shifter circuits performs Level shifting of a scan line, the number of sets of Level Shifter circuits is the same as the number of active pixel lines on the screen, and the scan line generator comprises a scan line pulse start counter and a scan line pulse stop counter;
the scanning line pulse starting counter is used for generating a scanning pulse starting edge on a corresponding scanning line according to the count value of the scanning line pulse starting counter when the starting mark of the effective pulse is received, and refreshing the image data of the source driver to the pixel row controlled by the corresponding scanning line;
and the scanning line pulse cut-off counter is used for generating a scanning pulse cut-off edge on the corresponding scanning line according to the count value of the scanning line pulse cut-off counter when the cut-off mark of the effective pulse is received, and the corresponding scanning line returns to a scanning invalid state to finish one-time scanning refreshing of the pixel row corresponding to the scanning line.
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