CN109767726B - Multi-window display control method for silicon-based micro-display and silicon-based micro-display - Google Patents
Multi-window display control method for silicon-based micro-display and silicon-based micro-display Download PDFInfo
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Abstract
The invention discloses a multi-window display control method of a silicon-based micro-display and the silicon-based micro-display, and the method comprises the following steps: when a display control command of a display window is received, setting the position, resolution, refresh rate and priority of the display window; performing digital-to-analog conversion on a digital pixel value of image data by opening a pixel conversion channel of a Source Driver to obtain an analog level; generating a display Switch control signal and a scanning line through a GIP circuit, and generating a Column strobe signal through a Pixel Column Switch; and the pixel driving circuit scans and refreshes the analog level to the pixel row of the pixel area through the scanning line and the column gating signal, drives the light-emitting devices of the pixels of the row to emit light, and controls the display window. The invention can make the silicon-based micro display perform multi-window display, different display windows can have different input video sources and different display refreshing frequencies, and the power consumption of the screen body during multi-window display is reduced.
Description
Technical Field
The invention relates to the technical field of display control, in particular to a multi-window display control method of a silicon-based micro-display and the silicon-based micro-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 display driving chip by utilizing a mature CMOS integrated circuit process, then manufacturing a light emitting device on the display driving chip, and completing the driving control of a screen body by a screen body driving circuit in the driving chip.
The maximum resolution that a silicon-based microdisplay can support is its own physical pixel resolution, such as M × N, where M represents the total number of rows of pixels and N represents the number of pixels per row. In addition to this, a display window having a display resolution smaller than M × N, such as a × B, where a < M, B < N, may be supported, and the a × B display window may be displayed at an arbitrary position within the M × N range. In addition, multiple display windows can be simultaneously displayed, and the resolution of each window is smaller than M multiplied by N.
Currently, there are generally two solutions to support multi-window display:
1. the solution at the video source end is that each frame of display picture of the video source sent to the display driving chip already supports multi-window display, which requires that the video source end sends the whole display picture each time, and the picture content already includes the content of each display window;
2. the Frame Buffer, generally SRAM, is used inside the driver chip. As shown in fig. 1, when the display data of each display window is updated, the value of the pixel storage space corresponding to each display window in the Frame Buffer needs to be updated. And when the screen is refreshed, refreshing all data in the whole Frame Buffer to the screen of the silicon-based micro-display. When the display window is smaller than the maximum resolution of the micro display, the method is generally realized by supplementing black pixels to the whole row of pixels which are not displayed and some columns of pixels which are not displayed, namely, the whole pixel area is completely refreshed during refreshing, the display window is brushed with the pixel values which are normally displayed, and the surrounding pixels are completely brushed with black.
In the above two solutions, the entire screen display refresh is uniform, and the same refresh frequency is maintained between different windows, which has the following disadvantages:
1. for the first solution, not only the transmission power consumption is large due to the need to transmit the whole frame of display data, but also the display power consumption is large due to the fact that each frame of the peripheral pixels of the window needs to be brushed in black when the whole frame of data is refreshed;
2. for the second solution, Frame buffers and other logic overhead need to be added inside the driver chip, so that the chip area is increased, the driver chip is complex in design, and extra power consumption is brought by the newly added chip area; in addition, the peripheral area of the display window is still refreshed to be black every frame, and large power consumption overhead is brought to the display driving chip and the pixel area.
Disclosure of Invention
The invention provides a multi-window display control method of a silicon-based micro-display and the silicon-based micro-display, which can adopt a mutual cooperation mode of a Source Driver, a digital GIP circuit and a Pixel Column Switch which are positioned in a driving chip, so that the silicon-based micro-display can carry out multi-window display, each display window can have different video sources and different refreshing frequencies, and the power consumption of a screen body during multi-window display is reduced.
In order to achieve the purpose, the invention provides a multi-window display control method of a silicon-based microdisplay, which is applied to the silicon-based microdisplay, wherein a driving chip of the silicon-based microdisplay internally comprises Source drivers, a GIP circuit and a Pixel Column Switch, wherein the number of the Source drivers corresponds to the number of maximum display windows supported by the silicon-based microdisplay, the GIP circuit internally comprises scan line generators with the same number as the Source drivers, and the Pixel Column Switch comprises Pixel Column select signal generators with the same number as the Source drivers;
the Source Driver comprises pixel conversion channels, each pixel conversion channel corresponds to a pixel column, and the pixel conversion channels are used for performing digital-to-analog conversion on digital pixel values of a line of image data of a video Source to obtain an analog level and refreshing the analog level to a line of pixel driving circuits of a pixel area;
the GIP circuit is used for generating a display Switch control signal Switch of the pixel driving circuit of each row of the pixel area and a scanning line Scan of each display window;
the Pixel Column Switch is used for generating a Column strobe signal PCS of a Pixel Column of which a Pixel area corresponds to each display window;
the method comprises the following steps:
when a display control command of a display window is received, setting the position, the resolution, the refresh rate and the priority of the display window;
performing digital-to-analog conversion on the pixel value of the image data by opening a pixel conversion channel of the Source Driver corresponding to the display window to obtain an analog level;
generating a display Switch control signal Switch of each Pixel row and a Scan line Scan of the Pixel row corresponding to the display window by the GIP circuit, and generating a Column strobe signal PCS of the Pixel Column corresponding to the display window by the Pixel Column Switch;
and scanning and refreshing the analog level to a pixel driving circuit of a pixel row of the pixel area through the scanning line Scan and a column gating signal PCS of the pixel column, driving the light-emitting devices of the pixels of the row to emit light, and controlling a display window.
The further technical scheme of the present invention is that the display window control includes full-screen display, single-window display, or multi-window display, and when performing window display, each scan line generator generates scan lines of a corresponding display window according to scan line configuration of the corresponding display window and a control signal of an input video source, where the scan line configuration of the scan lines includes a start pixel line and a stop pixel line of scanning, a scanning frequency, interlaced scanning, progressive scanning, forward scanning, and reverse scanning.
The further technical scheme of the invention is that the Pixel Column Switch comprises a plurality of groups of Pixel Column gating generators, the number of which is the same as that of the maximum display window, and each group of Pixel Column gating generators generates a Pixel Column gating signal PCS for the corresponding display window;
when window display is carried out, each group of column pixel gating devices generate a pixel column gating signal PCS of a corresponding display window according to pixel column gating configuration of the corresponding display window and control signals of an input video source, wherein the pixel column gating configuration of the display window comprises a starting pixel column and a stopping pixel column, scanning frequency and display window priority.
The further technical scheme of the invention is that the method also comprises the following steps:
and turning the display picture of the display window left and right by adjusting the sequence of writing pixel data of each line of the display image into a pixel conversion channel in the Source Driver corresponding to the display window.
The invention further adopts the technical scheme that when the silicon-based micro-display carries out full-screen display, all Pixel conversion channels of the Source Driver corresponding to the full-screen display are opened, the display Switch control signals Switch of all Pixel rows of the GIP circuit are opened, all Pixel Column gating signals PCS of the Pixel Column gating signal generator corresponding to the full-screen display of the Pixel Column switching signal generator are opened, the scanning line generator corresponding to the full-screen display of the GIP circuit generates the scanning line of each row of pixels, the analog level output by the Source Driver corresponding to the full-screen display is refreshed to the Pixel driving circuit of the corresponding Pixel row, and the light-emitting device is driven to emit light.
A further technical solution of the present invention is that, when the silicon-based microdisplay performs single-window display, the Source Driver, the GIP circuit, and the Pixel Column Switch cooperate to open a Pixel conversion channel of the Source Driver corresponding to a display window to perform digital-to-analog conversion on Pixel values of image data, and the step of obtaining an analog level further includes:
closing a pixel conversion channel of a pixel column outside the display window area in the Source Driver;
turning off the pixel column strobe signals PCS of the pixel columns outside the display window region so that these pixel columns are not refreshed and displayed as black;
the display Switch control signal Switch of the pixel row outside the display window region is turned off, the scanning line is kept in a non-refresh state, and the corresponding pixel row is in an off state and is displayed in black.
The invention has the further technical scheme that when the silicon-based micro-display performs multi-window display, the Source Driver, the GIP circuit and the Pixel Column Switch work cooperatively, the step of generating the display Switch control signal Switch of each Pixel row and the Scan line Scan of the Pixel row corresponding to the display window through the GIP circuit and the step of generating the Pixel Column gating signal PCS of the Pixel Column corresponding to the display window through the Pixel Column Switch comprise:
opening a pixel conversion channel corresponding to the pixel column where each window area is located in the Source Driver corresponding to the display window, and closing the pixel columns outside the display window area in the Source Driver corresponding to the display window;
opening a column gating signal PCS corresponding to the display window of a pixel column where the display area of each display window is located, so that the pixel columns can be refreshed by display image data of the display window; the method comprises the steps that a column gating signal PCS of a pixel column outside a display area of each display window, corresponding to the display window, is closed, and the pixel columns cannot be refreshed by display image data of the display window;
opening a display Switch control signal Switch of a pixel row where each display window area is located, and refreshing the analog level output by the Source Driver of each display window to the pixel row corresponding to the display area by the scanning line of each display window; the display Switch control signals Switch of the pixel rows outside the area of all the display windows are turned off, the Scan lines Scan of all the display windows of these pixel rows are kept in the non-refresh state, and these pixel rows are not refreshed by the display image data of any one display window.
The further technical scheme of the invention is that when the silicon-based microdisplay performs multi-window display, the method for controlling multi-window display of the silicon-based microdisplay further comprises the following steps:
when a window display control instruction is received, whether a display overlapping area exists between current display windows is judged, and if the display overlapping area exists, the content of a display window with high priority is displayed in the display overlapping area.
A further technical solution of the present invention is that the step of displaying the content of the display window with high priority in the display overlap area includes:
when the Scan line Scan of the display overlapping region of the low-priority display window is turned on, the pixel column gating signal PCS of the display overlapping region of the low-priority display window is turned off, the low-priority display window cannot refresh all the pixel columns of the display overlapping region, and when the Scan line Scan of the display overlapping region of the highest-priority display window is turned on, the pixel column gating signal PCS of the display overlapping region of the high-priority display window is turned on, and the display image data can be refreshed to the display overlapping region for display.
To achieve the above object, the present invention also proposes a silicon-based microdisplay comprising a memory, a processor and a computer program stored on the memory, which when executed by the processor implements the steps of the method as described above.
The invention has the beneficial effects that: the multi-window display control method of the silicon-based microdisplay can support full-screen display, single-window display and multi-window display through the technical scheme, the display resolution and the display position of each display window can be adjusted when the single window is displayed, the display resolution and the display position of each display window can be adjusted when the multi-window is displayed, the display refreshing frequency of each display window can be independently adjusted, the display priority of each window can be set, and the window with the highest priority is displayed at the forefront end. Therefore, compared with the prior art, the multi-window display control method of the silicon-based micro-display can not only enable the silicon-based micro-display to be capable of multi-window display, different display windows can have different input video sources, each video source can adopt different refreshing frequencies, but also reduce the power consumption of a screen body during multi-window display.
Drawings
FIG. 1 is a diagram illustrating a Frame Buffer for implementing a multi-window display in the prior art;
FIG. 2 is a flow chart diagram of a multi-window display control method of a silicon-based microdisplay according to the present invention;
FIG. 3 is a system structure diagram of a silicon-based microdisplay to which the multi-window display control method of the invention is applied;
FIG. 4 is a schematic diagram of a GIP structure supporting multiple display windows for a silicon-based microdisplay;
FIG. 5 is a schematic diagram of a Pixel Column Switch architecture for a silicon-based microdisplay supporting multiple display windows;
FIG. 6 is an illustration of a refresh mode for a silicon-based microdisplay displaying 2 windows;
fig. 7 is an explanatory diagram of the pixel display refresh control for one row of the pixel area.
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.
Considering that the display refreshing of the whole screen of the conventional silicon-based microdisplay is uniform, and the same refreshing frequency is kept among different windows, the invention provides a multi-window display control method of the silicon-based microdisplay, which can enable the silicon-based microdisplay to support flexible display modes, including full-screen display, single-window display and multi-window display, can realize the independent display of multiple windows, can randomly adjust the resolution and the position of each display window, can configure the display priority of each window, and only displays the content of the display window with the highest priority in the overlapped windows in an overlapped display area among the windows. For each display window, the up-down turning and the left-right turning of the display picture can be realized, all pixel circuits outside all display window areas are closed, refreshing is not carried out, and pure black is displayed, so that the power consumption of the Source Driver and the display power consumption of the pixel areas are greatly reduced.
Specifically, referring to fig. 2 to 7, the method for controlling multi-window display of a silicon-based microdisplay according to the present invention is applied to the silicon-based microdisplay, a Driver chip of the silicon-based microdisplay includes Source drivers, a GIP circuit and a Pixel Column Switch, wherein the number of the Source drivers corresponds to the number of maximum display windows supported by the silicon-based microdisplay, the GIP circuit includes scan line generators having the same number as the Source drivers, and the Pixel Column Switch includes Pixel Column select signal generators having the same number as the Source drivers.
The Source Driver comprises pixel conversion channels, each pixel conversion channel corresponds to one pixel column, and the pixel conversion channels are used for carrying out digital-to-analog conversion on digital pixel values of a line of image data of a video Source to obtain an analog level and refreshing the analog level to a line of pixel driving circuits of a pixel area.
The GIP circuit is used to generate the display Switch control signal Switch of the pixel driving circuit of each row of the pixel region and the Scan line Scan of each display window.
The Pixel Column Switch is used to generate a Column strobe signal PCS of a Pixel Column of which a Pixel area corresponds to each display window.
As shown in fig. 2, the method for controlling multi-window display of a silicon-based microdisplay of the present invention includes the following steps:
step S10, upon receiving the window display control instruction, sets the position, resolution, refresh rate, and priority of the display window.
And step S20, performing digital-to-analog conversion on the pixel value of the image data by opening the pixel conversion channel of the Source Driver corresponding to the display window to obtain an analog level.
Step S30, generating a display Switch control signal Switch of each Pixel row and a Scan line Scan of the Pixel row corresponding to the display window by the GIP circuit, and generating a Column gate signal PCS of the Pixel Column corresponding to the display window by the Pixel Column Switch;
in step S40, the analog level is scanned and refreshed to the pixel driving circuit of one pixel row in the pixel area through the Scan line Scan and the column strobe signal PCS of the pixel column, and the light emitting devices of the pixels in the row are driven to emit light, so as to perform display window control.
As an embodiment, in the present invention, the display window control includes full-screen display, single-window display, or multi-window display, and when performing window display, each scan line generator generates scan lines of a corresponding display window according to a scan line configuration of the corresponding display window and a control signal of an input video source, where the scan line configuration of the scan lines includes a start pixel line and an end pixel line of scanning, a scanning frequency, interlaced scanning, progressive scanning, forward scanning, and reverse scanning.
In the present invention, the Pixel Column Switch includes a number of sets of Column Pixel strobe generators equal to the number of the largest display windows, and each set of Pixel Column strobe generators generates a Pixel Column strobe signal PCS for the corresponding display window.
When window display is carried out, each group of pixel column gating devices generate a pixel column gating signal PCS of a corresponding display window according to pixel column gating configuration of the corresponding display window and control signals of an input video source, wherein the pixel column gating configuration of the display window comprises a starting pixel column and a stopping pixel column, scanning frequency and display window priority.
In addition, in the multi-window display control method of the silicon-based micro-display, the display picture of the display window can be turned left and right by adjusting the sequence of writing the pixel data of each line of the display image into the pixel conversion channel in the Source Driver.
When the silicon-based micro display displays the full screen, all Pixel conversion channels of the Source Driver corresponding to the full screen display are opened, the display Switch control signals Switch of all Pixel rows of the GIP circuit are opened, all Pixel column gating signals PCS of the Pixel column gating signal generator corresponding to the full screen display of the Pixel column Switch are opened, the scanning line generator corresponding to the full screen display of the GIP circuit generates the scanning line of each row of pixels, the analog level output by the Source Driver corresponding to the full screen display is refreshed to the Pixel driving circuit of the corresponding Pixel row, and the light-emitting device is driven to emit light.
When the silicon-based microdisplay displays a single window, the Source Driver, the GIP circuit and the Pixel Column Switch cooperate, and the step S20, after the step of obtaining the analog level, performs digital-to-analog conversion on the Pixel value of the image data by opening the Pixel conversion channel of the Source Driver corresponding to the display window:
step S201, turning off the pixel conversion channels of the pixel columns outside the display window area in the Source Driver.
In step S202, the pixel column strobe signal PCS of the pixel columns outside the display window region is turned off so that these pixel columns are not refreshed and displayed as black.
In step S203, the display Switch control signal Switch of the pixel row outside the display window region is turned off, the scanning line remains in the non-refresh state, and the corresponding pixel row is in the off state and is displayed in black.
When the silicon-based microdisplay performs multi-window display, the Source Driver, the GIP circuit and the Pixel Column Switch cooperate, and the step S30 of generating the display Switch control signal Switch of each Pixel row and the Scan line Scan of the Pixel row corresponding to the display window through the GIP circuit, and generating the Pixel Column select signal PCS of the Pixel Column corresponding to the display window through the Pixel Column Switch includes:
step S301, opening the pixel conversion channel corresponding to the pixel column of each window area in the Source Driver corresponding to the display window, and closing the pixel conversion channels of the pixel columns outside the display window area in the Source Driver corresponding to the display window.
Step S302, opening a column gating signal PCS corresponding to the display window of a pixel column where the display area of each display window is located, so that the pixel columns can be refreshed by the display image data of the display window; the column strobe signal PCS corresponding to the display window of the pixel columns outside the display area of each display window is turned off, and these pixel columns cannot be refreshed by the display image data of the display window.
Step S303, turning on a display Switch control signal Switch of a pixel row where each display window area is located, and refreshing the analog level output by the Source Driver of each display window to the pixel row corresponding to the display area by the scanning line of each display window; the display Switch control signals Switch of the pixel rows outside the area of all the display windows are turned off, the Scan lines Scan of all the display windows of these pixel rows are kept in the non-refresh state, and these pixel rows are not refreshed by the display image data of any one display window.
As an embodiment, when the silicon-based microdisplay performs multi-window display, the method for controlling multi-window display of the silicon-based microdisplay further includes: when a window display control instruction is received, whether a display overlapping area exists between current display windows is judged, and if the display overlapping area exists, the content of a display window with high priority is displayed in the display overlapping area. The method comprises the steps that when a scanning line Scan of a display overlapping region of a low-priority display window is opened, a pixel column gating signal PCS of the display overlapping region of the low-priority display window is closed, the low-priority display window cannot refresh all pixel columns of the display overlapping region, when a scanning line Scan of the display overlapping region of a high-priority display window is opened, a pixel column gating signal PCS of the display overlapping region of the high-priority display window is opened, and display image data can be refreshed to the display overlapping region for display.
As shown in fig. 6, the silicon-based microdisplay has a display Window 1(Window1) and a display Window 2(Window2) through display Window control, and the priority of the display Window1 is set low and the priority of the display Window2 is set high. The display window1 and the display window2 have a display overlap area (WO) whose specification is RO rows × CO columns. When the display window1 is turned on at the Scan line Scan of a certain row of RO rows of pixels displaying the overlap area WO, since the priority of the display window1 is low, the display window1 is turned off at all the CO column strobe signals PCS of the display overlap area WO, the pixel data of the display window1 cannot be refreshed into the pixel drive circuits of that row of pixels within the display overlap region WO, and the pixel column strobe signal PCS of the display window1 within the range of the display window1 outside the display overlap area WO of the pixel row is normally turned on, the pixel data of the display window1 can be refreshed into the pixel driving circuits of the pixel columns of the pixel row that are within the display window1 outside the display overlap area WO, so that the display window1 cannot display a refresh in the display overlap area WO, the display area within the range of the display window1 outside the display overlap area WO can be refreshed normally. When the display window2 is turned on at the Scan line Scan of a certain row of the RO row pixels of the display overlap region WO, because the priority of the display window2 is high, and the display window2 is turned on at all the pixel column strobe signals PCS within the range of the display window2, the pixel data of the display window2 can be refreshed into the pixel driving circuits of all the pixel columns within the range of the display window2 of the pixel row, so that the display window2 can perform normal display refresh in the display region within the range of the display window2 including the display overlap region WO.
It should be noted that the multi-window display control method for the silicon-based microdisplay provided by the invention can be applied to the silicon-based OLED microdisplay, the silicon-based LCOS microdisplay (silicon-based liquid crystal display), or other various silicon-based microdisplays. The present invention will be described in detail below with reference to fig. 2 to 7 by taking a silicon-based OLED micro-display as an example.
In the silicon-based OLED micro-display applied by the invention, the Source Driver has the function of performing digital-to-analog conversion on digital pixel values of a line of image data by using an internal pixel conversion channel to obtain an analog level, and refreshing the analog level to pixels in a pixel area. The system can switch and control the conversion channel of each pixel of the Source Driver. When a certain row of pixels in the pixel area need to be refreshed normally for display, the channel is opened, the analog level of the pixels is output, and the pixels are refreshed in the pixel area in cooperation with the GIP circuit and the PixelColumn Switch for display; when a certain pixel row does not need to refresh the display, the pixel conversion channel can be closed through system configuration, and the black color is displayed on the pixel row all the time. When the pixel conversion channel is closed, the power consumption of the pixel conversion channel becomes very low, and the purpose of saving the power consumption can be achieved.
By adjusting the sequence of writing each row of pixel data of the display image of each display window into the pixel conversion channel in the Source Driver, the left and right turning of the display picture of each display window can be realized. If the pixel data are written in sequence from the left end pixel conversion channel to the right end pixel conversion channel of the Source driver, the display frame is from left to right; if the pixel data is written in sequence from the right-end pixel conversion channel of the Source Driver to the left-end pixel conversion channel, the display change surface is from right to left. The starting point of writing the pixel data into the Source Driver is determined by the position of the display window, and the first pixel data of each row of pixels is written into the first pixel conversion channel in the Source Driver, which is consistent with the display direction.
In a system supporting multi-window display, the number of Source drivers is determined by the number of the largest display windows that the silicon-based OLED microdisplay needs to support.
For example, if the maximum number of display windows is 1, the system needs 1 Source Driver; if the maximum display window number is 2, the system needs 2 Source drivers, Source Driver w1 and Source Driver w 2; and so on.
As shown in fig. 4, the GIP circuit functions to generate the display Switch control signals Switch for the pixels of each row of the pixel area and the Scan lines Scan for each display window in the present invention. The display Switch control signal Switch of each row of pixels determines whether the pixel row is on for display, if so, the pixels of the row can emit light, and the brightness is determined by the analog level of the scanning brush; if the display is off, the row of pixels does not emit light and appears to be solid black. The Scan line Scan is used for controlling the analog level output by the Source Driver to be refreshed into the pixel driving circuit in which row of the pixel area, if the Scan line of one row of the pixel driving circuit is closed, the pixel driving circuit in the row is not influenced by the analog level output by the Source Driver, and the pixel in the row keeps the current light-emitting brightness unchanged; if the scanning line of a row of pixel driving circuits is opened, the analog level output by the Source Driver is refreshed to the row of pixel driving circuits, and the brightness of the pixel row is refreshed to the brightness corresponding to the refreshed analog level. When the display Switch control signal Switch is turned on, the Scan line Scan is active; when the display Switch control signal Switch is turned off, the scanning line does not function, and the corresponding pixel row is always displayed in pure black.
Depending on the number of maximum display windows that the silicon-based OLED microdisplay needs to support, the GIP circuit generates the same number of Scan lines Scan for each pixel row, such as: if the maximum display window number is 1, the scanning line generated by the GIP circuit for each pixel row is a Scan; if the maximum display window number is 2, the GIP circuit generates two scan lines, w1_ scan and w2_ scan, for each pixel row; and so on.
As shown in fig. 4, if the silicon-based microdisplay has M rows of valid pixels, the maximum supported window number is X, the GIP circuit includes X sets of Scan line generators, each Scan line generator generates a set of Scan lines for one of the display windows, and X display windows generate X sets of Scan lines Scan in total. Wherein the scan lines of window1 are from w1_ scan _1 to w1_ scan _ M, the scan lines of window2 are from w2_ scan _1 to w2_ scan _ M, and so on, and the scan lines of window X are from wX _ scan _1 to wX _ scan _ M. Wherein each set of scan lines can perform scan refresh on all active pixel rows of the microdisplay. When the window display is performed, each scan line generator generates the scan lines corresponding to the display window according to the scan line configuration of the display window corresponding to the scan line generator, and the control signals of the input video source, including the clock pclk, the frame synchronization Vsync, and the line synchronization Hsync. The scan line configuration of the display window includes a start pixel line and an end pixel line of scanning, a scanning frequency, interlaced scanning and progressive scanning, forward scanning and reverse scanning, and the like.
It can be understood that the scanning modes of the plurality of scanning lines of each pixel row are independently specified by the display settings of the corresponding display windows, and are independent from each other and do not interfere with each other.
In a system supporting multiple display windows, if only one display window is opened, it has the same function as the system of a single display window, and further, if this display window displays the maximum resolution that the microdisplay can support, this is done full screen.
By utilizing the functions of the GIP circuit and through system configuration, the GIP can support full-screen display, single-window display and multi-window display; the scanning refreshing direction of each display window can be from top to bottom or from bottom to top, so that the image is turned over from top to bottom.
In the present invention, the function of the Pixel Column Switch is to generate a Pixel Column strobe signal PCS for each Pixel Column of the Pixel area. When the PCS is opened, the pixel driving circuit on the pixel column can receive the analog level output by the pixel conversion channel in the Source Driver, and the pixel value can be refreshed; when PCS is closed, the pixel driving circuit on the pixel column can not receive the analog level output by the pixel conversion channel in the Source Driver, the pixel value can not be refreshed, and if the previous pixel is displayed as black, the pixel column can not emit light all the time and can be displayed as pure black all the time.
According to the number of the largest display windows needing to be supported by the silicon-based OLED micro-display, the Pixel Column Switch generates the same number of Pixel Column gating signals PCS for each Pixel row, for example, if the number of the largest display windows is 1, the Pixel Column gating signal PCS generated by the Pixel Column Switch for each Pixel Column is one; if the maximum display window number is 2, the Pixel Column Switch generates two Pixel Column strobe signals for each Pixel Column, w0_ pcs _ and w1_ pcs, and so on.
As shown in fig. 5, if the silicon-based microdisplay has N columns of active pixels, the maximum supported window number is X, the PixelColumn Switch includes X sets of pixel column gates inside, each pixel column gate generates a set of pixel column gate signals for one of the display windows, and X display windows generate X sets of pixel column gate signals PCS in total. The pixel column strobe signals of the window1 are from w1_ pcs _1 to w1_ pcs _ N, the pixel column strobe signals of the window2 are from w2_ pcs _1 to w2_ pcs _ N, and so on, and the pixel column strobe signals of the window X are from wX _ pcs _1 to wX _ pcs _ N. And each group of pixel column gating signals can gate and control all effective pixel columns of the micro display. When window display is carried out, each column gate is configured according to the pixel column gate of the corresponding display window, and control signals of a video source including a clock pclk, a frame synchronization Vsync and a row synchronization Hsync are input, so that column gate signals corresponding to the display windows are generated. The column gating configuration of the display window comprises a starting pixel column and a cut-off pixel column of the display, a scanning frequency and a display window priority.
The control manner of the plurality of pixel column strobe signals PCS for each pixel column is individually specified by the display setting of the corresponding display window.
In a system supporting a plurality of display windows, if there is an overlap between the display windows, the content of which window is displayed in the overlap region is determined according to the priority of the display window set by the system, and the image of the display window with the higher priority in the overlap region is normally displayed and the image of the display window with the lower priority in the overlap region is not displayed. For the display window with low priority, the turn-on and turn-off of the PCS in the pixel column of the overlapping region are affected by the scanning position of the Scan line Scan corresponding to the window. If the current scanning position is a pixel row outside the display overlapping area, PCS signals of a pixel column where the display overlapping area is located are all started, namely in a non-display overlapping area, the display window with the low priority is displayed normally; if the currently scanned pixel row in the display overlap area is scanned, the PCS signals of the pixel column in which the display overlap area is located are all turned off, and at this time, the data of the display window with the low priority cannot be updated to the display overlap area. For the display window with high priority, the PCS of the pixel columns in the display area is always on, the PCS of the pixel columns in the non-display area is always off, and the pixel columns are not displayed. The PCS of all the pixel columns outside the window display area are always off and these pixel columns are not displayed.
It will be appreciated that in a multi-window supported silicon-based microdisplay, for a pixel driver circuit in its pixel area, when and only the Scan line Scan and pixel column strobe signal PCS of one display window are simultaneously on, it can be correctly refreshed into new pixel analog levels.
The working principle when the silicon-based OLED micro-display performs full-screen display, single-window display and multi-window display is as follows.
When the silicon-based OLED micro-display displays in a full screen mode, all Pixel conversion channels of a Source Driver need to be opened, scanning lines of all Pixel rows of a GIP are opened, and Pixel Column gating signals PCS of all Pixel columns of a Pixel Column Switch are opened. And refreshing the pixel analog level output by the Source Driver to a pixel driving circuit of a corresponding pixel row by using the scanning line Scan of each row of pixels, and driving the OLED devices of the pixel row to emit light.
When the silicon-based OLED micro-display performs single-window display, Source Driver, GIP and Pixel column switch are required to work cooperatively in the following manner:
1. opening a pixel conversion channel corresponding to the pixel column in the Source Driver where the display window area is located, and closing the pixel conversion channel in the Source Driver where the pixel column outside the display window area is located;
2. opening a pixel column gating signal PCS of a pixel column where a display window area is located, wherein the pixel columns can be refreshed normally; the column strobe PCS of the columns of pixels outside the display window area is turned off, and these columns of pixels cannot be refreshed and are displayed as pure black at all times.
3. A display Switch control signal Switch of a pixel row where a display window area is located is turned on, and a scanning line Scan refreshes a pixel analog level output by a Source Driver to a corresponding pixel row driving circuit; the display Switch control signal Switch of the pixel row outside the display window area is turned off, the Scan line Scan is kept in a non-refresh state, and the corresponding pixel row is always in a turned-off state and is displayed as pure black.
4. In order to prevent display abnormality caused by voltage instability of the Pixel region at the time of display on and display off, the whole Pixel region may be entirely refreshed to black by Source Driver, GIP, Pixel Column Switch cooperating before the display starts and before the display exits.
When the silicon-based OLED micro-display carries out multi-window display, Source Driver, GIP and Pixel column switch are required to work cooperatively, and the mode is as follows:
1. opening a pixel conversion channel corresponding to the pixel column of each display window area in the Source Driver corresponding to the display window, and closing the pixel columns outside each display window area in the Source Driver corresponding to the display window;
2. opening a pixel column gating signal PCS (personal communication System) corresponding to the display window of a pixel column where each display window area is located, wherein the pixel columns can be refreshed normally; the pixel column strobe signal PCS corresponding to the display window of the pixel columns outside the display window area is turned off, and these pixel columns cannot be refreshed by the data of the display window.
3. Opening a display Switch control signal Switch of a pixel row where each display window area is located, and refreshing the pixel analog level output by the Source Driver corresponding to the display window to the pixel driving circuit of the corresponding row by the scanning line of each display window; the display Switch control signals Switch of the pixel rows outside all the display window areas are turned off, all the display windows are kept in a non-refresh state on the scanning lines Scan of the pixel rows, and the corresponding pixel rows cannot be refreshed by any display window.
4. If there is an area between the windows where the display overlaps, then that area displays the contents of the high priority display window, while the low priority display window pixel columns are not displayed. When the Scan line Scan of the overlapping area of the low priority display window is turned on, the pixel column strobe signal PCS of the overlapping area of the low priority display window may be turned off, and the low priority display window may not refresh the overlapping area. And the Scan line Scan and the pixel column strobe signal PCS of the display window with the highest priority in the overlap region are normally opened, and the display image data can be refreshed in the display overlap region for normal display.
5. In order to prevent display abnormality caused by voltage instability of the Pixel region at the time of display on and display off, the whole Pixel region may be entirely refreshed to black by Source Driver, GIP, Pixel Column Switch cooperating before the display starts and before the display exits.
The multi-window display control method of the silicon-based microdisplay can support full-screen display, single-window display and multi-window display through the technical scheme, the display resolution and the display position of each display window can be adjusted when the single window is displayed, the display resolution and the display position of each display window can be adjusted when the multi-window is displayed, the display refreshing frequency of each display window can be independently adjusted, the display priority of each window can be set, and the window with the highest priority is displayed at the forefront end. Therefore, compared with the prior art, the multi-window display control method of the silicon-based micro-display can not only enable the silicon-based micro-display to be capable of multi-window display, different display windows can have different input video sources, each video source can adopt different refreshing frequencies, but also reduce the power consumption of a screen body during multi-window display.
In order to achieve the above object, the present invention further provides a silicon-based microdisplay, which includes a memory, a processor and a computer program stored in the memory, wherein the computer program implements the steps of the above method when being executed by the processor, and the steps are not described herein again.
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 (8)
1. The method is characterized in that the method is applied to a silicon-based micro-display, a driving chip of the silicon-based micro-display internally comprises Source drivers, a GIP circuit and a Pixel column Switch, wherein the number of the Source drivers corresponds to the number of the maximum display windows supported by the silicon-based micro-display, the GIP circuit internally comprises scan line generators with the same number as the Source drivers, and the Pixel column Switch internally comprises Pixel column select signal generators with the same number as the Source drivers;
the Source Driver comprises pixel conversion channels, each pixel conversion channel corresponds to a pixel column, and the pixel conversion channels are used for performing digital-to-analog conversion on digital pixel values of a line of image data of a video Source to obtain an analog level and refreshing the analog level to a line of pixel driving circuits of a pixel area;
the GIP circuit is used for generating a display Switch control signal Switch of the pixel driving circuit of each row of the pixel area and a scanning line Scan of each display window;
the Pixel Column Switch is used for generating a Column strobe signal PCS of a Pixel Column of which a Pixel area corresponds to each display window;
the method comprises the following steps:
when a display control command of a display window is received, setting the position, the resolution, the refresh rate and the priority of the display window;
performing digital-to-analog conversion on the pixel value of the image data by opening a pixel conversion channel of the Source Driver corresponding to the display window to obtain an analog level;
generating a display Switch control signal Switch of each Pixel row and a Scan line Scan of the Pixel row corresponding to the display window by the GIP circuit, and generating a Column strobe signal PCS of the Pixel Column corresponding to the display window by the Pixel Column Switch;
the analog level is scanned and refreshed to a pixel driving circuit of a pixel row of the pixel area through the scanning line Scan and a column strobe signal PCS of the pixel column, and light-emitting devices of the pixels of the row are driven to emit light to perform display window control;
the display window control comprises full screen display, single window display or multi-window display, when window display is carried out, each scanning line generator generates scanning lines of a corresponding display window according to scanning line configuration of a corresponding display window and a control signal of an input video source, wherein the scanning line configuration of the scanning lines comprises a starting pixel line and a stopping pixel line of scanning, scanning frequency, interlaced scanning, progressive scanning, forward scanning and reverse scanning;
when the silicon-based microdisplay displays in multiple windows, the Source Driver, the GIP circuit and the Pixel Column Switch work cooperatively, the step of generating the display Switch control signal Switch of each Pixel row and the Scan line Scan of the Pixel row corresponding to the display window through the GIP circuit and generating the Pixel Column gating signal PCS of the Pixel Column corresponding to the display window through the Pixel Column Switch comprises:
opening a pixel conversion channel corresponding to the pixel column where each window area is located in the Source Driver corresponding to the display window, and closing the pixel columns outside the display window area in the Source Driver corresponding to the display window;
opening a column gating signal PCS corresponding to the display window of a pixel column where the display area of each display window is located, so that the pixel columns can be refreshed by display image data of the display window; the method comprises the steps that a column gating signal PCS of a pixel column outside a display area of each display window, corresponding to the display window, is closed, and the pixel columns cannot be refreshed by display image data of the display window;
opening a display Switch control signal Switch of a pixel row where each display window area is located, and refreshing the analog level output by the Source Driver of each display window to the pixel row corresponding to the display area by the scanning line of each display window; the display Switch control signals Switch of the pixel rows outside the area of all the display windows are turned off, the Scan lines Scan of all the display windows of these pixel rows are kept in the non-refresh state, and these pixel rows are not refreshed by the display image data of any one display window.
2. The method of claim 1 in which the PixelColumn Switch contains as many sets of pixel column strobe generators as there are maximum display windows, each set of pixel column strobe generators generating a pixel column strobe signal PCS for the corresponding display window;
when window display is carried out, each group of column pixel gating devices generate a pixel column gating signal PCS of a corresponding display window according to pixel column gating configuration of the corresponding display window and control signals of an input video source, wherein the pixel column gating configuration of the display window comprises a starting pixel column and a stopping pixel column, scanning frequency and display window priority.
3. The method of claim 2 further comprising the steps of:
and turning the display picture of the display window left and right by adjusting the sequence of writing pixel data of each line of the display image into a pixel conversion channel in the Source Driver corresponding to the display window.
4. The method as claimed in claim 3, wherein when the silicon-based microdisplay displays full screen, all Pixel conversion channels of Source Driver corresponding to full screen display are turned on, the display Switch control signals Switch of all Pixel rows of the GIP circuit are turned on, all Pixel Column select signals PCS of the Pixel Column select signal generator corresponding to full screen display of the Pixel Column Switch are turned on, the scan line generator corresponding to full screen display of the GIP circuit generates scan lines of each row of pixels, and the analog level output by the Source Driver corresponding to full screen display is refreshed to the Pixel driving circuit of the corresponding Pixel row to drive the light emitting device to emit light.
5. The method of claim 3, wherein when the silicon-based microdisplay is displaying a single window, the step of obtaining the analog level by the Source Driver, the GIP circuit, and the Pixel Column Switch working together, and the step of performing digital-to-analog conversion on the Pixel value of the image data by opening the Pixel conversion channel of the Source Driver corresponding to the display window further comprises:
closing a pixel conversion channel of a pixel column outside the display window area in the Source Driver;
turning off the pixel column strobe signals PCS of the pixel columns outside the display window region so that these pixel columns are not refreshed and displayed as black;
the display Switch control signal Switch of the pixel row outside the display window region is turned off, the scanning line is kept in a non-refresh state, and the corresponding pixel row is in an off state and is displayed in black.
6. The method of claim 1, wherein when the silicon-based microdisplay is performing multi-window display, the method further comprises:
when a window display control instruction is received, whether a display overlapping area exists between current display windows is judged, and if the display overlapping area exists, the content of a display window with high priority is displayed in the display overlapping area.
7. The method of claim 6, wherein the step of displaying contents of a high priority display window in the display overlap region comprises:
when the Scan line Scan of the display overlapping region of the low-priority display window is turned on, the pixel column gating signal PCS of the display overlapping region of the low-priority display window is turned off, the low-priority display window cannot refresh all the pixel columns of the display overlapping region, and when the Scan line Scan of the display overlapping region of the highest-priority display window is turned on, the pixel column gating signal PCS of the display overlapping region of the high-priority display window is turned on, and the display image data can be refreshed to the display overlapping region for display.
8. A silicon-based microdisplay comprising a memory, a processor and a computer program stored on the memory which when executed by the processor implements the steps of the method of any of claims 1-7.
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