CN105187747A - Multifunctional LCD display controller and control method thereof - Google Patents
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Abstract
The invention discloses a multifunctional LCD display controller and a control method thereof. A display signal is input by an 8080 interface module and is buffered in a first FIFO buffering module, a video signal is input by a video interface module and is buffered in a second FIFO buffering module, a main control module controls a video processing module, a display processing module and a synthesizing and stacking module to process and synthesize the video signal and the display signal according to external control information, an OSD stacking module adds OSD characters to obtain finally synthesized data, and finally, a time sequence generating module displays the finally synthesized data on an LCD display screen according to a corresponding time sequence. The multifunctional LCD display controller and the control method thereof have the advantages of having multiple functions of matching multiple types of interfaces, image zooming, adjusting and stacking, and picture in picture display; when the multifunctional LCD display controller is applied to an image-video embedded system, information processing load of a preceding-stage system can be reduced, transportability is improved, and resource costs are reduced.
Description
Technical field
The present invention relates to a kind of LCD Display Technique, especially relate to a kind of multi-functional LCD display controller and control method thereof.
Background technology
Along with image/video Display Technique development, visualized operation has become the important component part that in current embedded system, hommization is experienced, and image/video embedded system is widely applied.Image/video embedded system mainly comprises backing system (single-chip microcomputer and ARM etc.), LCD display controller (directly can be integrated in image/video embedded system inner), memory, camera and LCD display.LCD display controller is the indispensable important component part of present image Video Embedded System.Along with the raising that multimedia display requires, various function and demand are all had higher requirement to LCD display controller, and the transmission display and control of picture signal, polymorphic type interface, image scaling adjust the functions such as superposition, picture-in-picture display and OSD all to be needed LCD display controller to realize.But existing LCD display controller is mainly chip-shaped LCD display controller, its flexibility is not enough, and input interface is single, above-mentioned functions is difficult to embed completely flexibly, when causing image/video embedded system to state function in realization thus, polymorphic type Interface Matching, image scaling adjustment superposition and picture-in-picture display can only be put into backing system to process, be input to again in LCD display controller after having processed and process, cause large, portable weak, the resources costs increase of backing system process information amount thus.
Summary of the invention
One of technical problem to be solved by this invention is to provide a kind ofly possesses polymorphic type Interface Matching, image scaling adjustment superposition and the multi-functional LCD display controller of picture-in-picture Presentation Function, when this multi-functional LCD display controller is applied in image/video embedded system, the information processing burden of backing system can be reduced, improve it portable, reduce resources costs.
The present invention one of to solve the problems of the technologies described above the technical scheme adopted: a kind of multi-functional LCD display controller, comprises main control module, for accessing 8080 interface modules of display interface signal, the video interface module for incoming video signal, a FIFO cache module, the 2nd FIFO cache module, video processing module, Graphics Processing module, synthesis laminating module, OSD laminating module, sequential generation module, the first sdram controller and the second sdram controller; Described video interface module is connected with a described FIFO cache module, and a described FIFO cache module is connected with described video processing module, and described video processing module is connected with the first described sdram controller; 8080 described interface modules are connected with the 2nd described FIFO cache module, the 2nd described FIFO cache module and described Graphics Processing model calling, and described Graphics Processing module is connected with the second described sdram controller; The first described sdram controller is connected with described synthesis laminating module respectively with the second described sdram controller, described synthesis laminating module is connected with described OSD laminating module, described OSD laminating module and described sequential generation model calling, described main control module is connected with described video processing module, described Graphics Processing module and described synthesis laminating module respectively.
Compared with prior art, the advantage of multi-functional LCD display controller of the present invention is video interface module to be connected with external video acquisition module, 8080 interface modules are connected with backing system, access displays by 8080 interface modules and be cached to a FIFO cache module, the 2nd FIFO cache module is cached to by video interface module incoming video signal, main control module controls video processing module according to external control information, Graphics Processing module and synthesis laminating module carry out process synthesis to vision signal and display, then added by OSD laminating module and obtain final generated data with screen character, finally by sequential generation module, final generated data is shown in LCD display according to corresponding sequential, multi-functional LCD display controller of the present invention possesses polymorphic type Interface Matching thus, image scaling adjustment superposition and picture-in-picture display several functions, when being applied in image/video embedded system, the information processing burden of backing system can be reduced, improve it portable, reduce resources costs.
Two of technical problem to be solved by this invention is to provide a kind of control method of multi-functional LCD display controller possessing polymorphic type Interface Matching, image scaling adjustment superposition and picture-in-picture Presentation Function, when the control method of this LCD display controller is applied in image/video embedded system, the information processing burden of backing system can be reduced, improve it portable, reduce resources costs.
Two technical schemes adopted that the present invention solves the problems of the technologies described above are: a kind of control method of multi-functional LCD display controller, comprises the following steps:
1. initial video data is stored in a FIFO cache module by video interface module, initial display data is stored in the 2nd FIFO cache module by 8080 interface modules;
2. video processing module obtains the initial video data stored in a FIFO cache module, and Graphics Processing module obtains the initial display data stored in the 2nd FIFO cache module;
3. video data processing command is sent to video processing module by main control module, and display data processing command is sent to Graphics Processing module; Video data processing command comprises the display address of each pixel in the viewing area of LCD display that the convergent-divergent multiple of video data and video data comprise, and display data processing command comprises the display address of each pixel in the viewing area of LCD display that display data comprise;
4. video processing module carries out convergent-divergent process and display address process according to video data processing command to initial video data, obtain video data to be shown, in this video data to be shown, each pixel is distributed in the viewing area of LCD display according to the display address of its correspondence, and video data to be shown is stored in outside the one SDRAM be connected with the first sdram controller by the first sdram controller; Graphics Processing module carries out display address process according to display data processing command to initial display data, obtain display data to be shown, in these display data to be shown, each pixel is distributed in the viewing area of LCD display according to the display address of its correspondence, and display data to be shown are stored in outside the 2nd SDRAM be connected with the second sdram controller by the second sdram controller;
5. main control module sends display and control order to synthesis laminating module, synthesis laminating module carries out synthesis overlap-add procedure according to display and control order to video data to be shown and display data to be shown, obtain preliminary generated data, and preliminary generated data is sent to OSD laminating module;
What 6. outside inputted by OSD laminating module obtains final generated data with shielding in character adding to preliminary generated data and sends to sequential generation module;
7. sequential generation module produces the clock signal that final generated data needs in LCD display display, is shown in LCD display by final generated data.
The display and control order that 5. middle main control module sends of described step is divided into three kinds, is respectively the order of single video output mode, single display data output mode order and the order of picture-in-picture display mode; When display and control order is the order of single video output mode, synthesis laminating module obtains the video data to be shown of outside first sdram memory storage by the first sdram controller, and is exported as preliminary generated data by this video data to be shown; When display and control order is single display data output mode order, synthesis laminating module obtains the display data to be shown of outside second sdram memory storage by the second sdram controller, and these display data to be shown is exported as preliminary generated data; When display and control order is the order of picture-in-picture display mode, synthesis laminating module identifies display address successively according to following rule from the initial display address of the viewing area of LCD display, until arrive the end display address of the viewing area of LCD display: if only there is the pixel of video data to be shown at a display address place of the viewing area of LCD display, then synthesize laminating module the obtains outside first sdram memory storage video data to be shown pixel at this display address place by means of only the first sdram controller; If only there is the pixel of display data to be shown at a display address place of the viewing area of LCD display, then synthesize laminating module the obtains outside second sdram memory storage display data to be shown pixel at this display address place by means of only the second sdram controller; If not only there is the pixel of video data to be shown at a display address place of the viewing area of LCD display but also there is the pixel of display data to be shown, then synthesize laminating module the obtains outside first sdram memory storage video data to be shown pixel at this display address place by means of only the first sdram controller; Each pixel in the video data to be shown obtained is placed on one deck as video data to be synthesized according to its display address by synthesis laminating module, be placed on as display data to be synthesized on one deck using each pixel in the display data to be shown obtained according to its display address, last layer video data to be synthesized being layered in display data to be synthesized obtains preliminary generated data and exports.Said method is adopted to obtain preliminary generated data, the space selected of LCD display can be used by adding users, make full use of the display that screen carries out effective information, single video exports the occasion being used for reverse image etc. and only needing video to show, and adding users can range of observation; Single display data export the occasion being used for interface operation etc. and only needing control operation to show, adding users operating experience; Picture-in-picture display mode is then in the occasion needing to carry out according to monitor video control operation, and eliminating observation control needs not stop to switch, and can carry out operation control the most intuitively.
Described step 6. in OSD laminating module outside input with shield character adding comprise two kinds to the stacked system in preliminary generated data, be respectively and cover stacked system and transparency overlay mode: when for covering stacked system, adopt and directly override in preliminary generated data with shielding the pixel that character shows address identical in the viewing area of LCD display with shielding character; When for transparency overlay mode, superpose according to following steps:
A, determine in LCD display, to show the viewing area of address overlap with screen character and preliminary generated data;
The pixel of preliminary generated data that in the viewing area of b, acquisition overlap, each display address is corresponding and the pixel with screen character;
C, red component, green component and blue component according to each transparency overlay pixel corresponding to display address in the viewing area of following formulae discovery overlap:
R＝alpha*R_data+(1-alpha)*R_area
G＝alpha*G_data+(1-alpha)*G_area
B＝alpha*B_data+(1-alpha)*B_area
Wherein R represents the red component of transparency overlay pixel, and G represents the green component of transparency overlay pixel, and B represents the blue component of transparency overlay pixel; Alpha represents transparency, and it is constant and is greater than 0 to be less than 1; R_data represents the red component of the pixel of preliminary generated data, and G_data represents the green component of the pixel of preliminary generated data, and B_data represents the blue component of the pixel of preliminary generated data; R_area represents the red component of the pixel with screen character, and G_area represents the green component of the pixel with screen character, and B_area represents the blue component of the pixel with screen character;
D, R, G and B of calculating in step c be reduced to display address overlap viewing area in transparency overlay pixel corresponding to each display address;
Each transparency overlay pixel obtained in e, employing steps d replaces the pixel at corresponding display address place in preliminary generated data, obtains final generated data.In the method, adding of transparency overlay adds displaying contents and stresses with the emphasis between screen character, can increase transparency, make displaying contents more clear when displaying contents is attached most importance to; When needing to give prominence to the key points with screen character, can transparency be reduced, make superposition content more clear, the content of required display of can being given prominence to the key points very easily by the adjustment of transparency.
Compared with prior art, the advantage of the control method of multi-functional LCD display controller of the present invention is accessing displays by 8080 interface modules and is being cached to a FIFO cache module, the 2nd FIFO cache module is cached to by video interface module incoming video signal, main control module controls video processing module according to external control information, Graphics Processing module and synthesis laminating module carry out process synthesis to vision signal and display, then added by OSD laminating module and obtain final generated data with screen character, finally by sequential generation module, final generated data is shown in LCD display according to corresponding sequential, thus multi-functional LCD display controller of the present invention control method can with polymorphic type Interface Matching, realize image scaling adjustment superposition and picture-in-picture display several functions, when being applied in image/video embedded system, the information processing burden of backing system can be reduced, improve it portable, reduce resources costs.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of multi-functional LCD display controller of the present invention;
Fig. 2 is multi-functional LCD display controller of the present invention connection layout in embedded systems;
Fig. 3 is the synthetic effect figure of the control method of multi-functional LCD display controller of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiment, multi-functional LCD display controller of the present invention is described in further detail.
Embodiment: as shown in Figure 1, a kind of multi-functional LCD display controller, comprises main control module, for accessing 8080 interface modules of display interface signal, the video interface module for incoming video signal, a FIFO cache module, the 2nd FIFO cache module, video processing module, Graphics Processing module, synthesis laminating module, OSD laminating module, sequential generation module, the first sdram controller and the second sdram controller; Video interface module is connected with a FIFO cache module, and a FIFO cache module is connected with video processing module, and video processing module is connected with the first sdram controller; 8080 interface modules are connected with the 2nd FIFO cache module, the 2nd FIFO cache module and Graphics Processing model calling, and Graphics Processing module is connected with the second sdram controller; First sdram controller and the second sdram controller are connected with synthesis laminating module respectively, synthesis laminating module is connected with OSD laminating module, OSD laminating module and sequential generation model calling, main control module is respectively with video processing module, Graphics Processing module with synthesize laminating module and be connected.
In the present embodiment, main control module, 8080 interface modules, video interface module, a FIFO cache module, the 2nd FIFO cache module, video processing module, Graphics Processing module, synthesis laminating module, OSD laminating module, sequential generation module, the first sdram controller and the second sdram controller all can adopt the matured product of its technical field.
As shown in Figure 2, the multi-functional LCD display controller of the present embodiment is applied in embedded system, 8080 interface modules are connected with ARM system, video interface module is connected with camera, first sdram controller is connected with a SDRAM, second sdram controller is connected with the 2nd SDRAM, and sequential generation module is connected with LCD display.The display that 8080 interface module access ARM system export also is cached to a FIFO cache module, the vision signal that video interface module access camera exports also is cached to the 2nd FIFO cache module, main control module controls video processing module according to external control information, Graphics Processing module and synthesis laminating module carry out process synthesis to vision signal and display, then added by OSD laminating module and obtain final generated data with screen character, finally by sequential generation module, final generated data is shown in LCD display according to corresponding sequential, realize polymorphic type Interface Matching thus, image scaling adjustment superposition and picture-in-picture display several functions, when being applied in image/video embedded system, the information processing burden of backing system can be reduced, improve it portable, reduce resources costs.
Present invention also offers a kind of control method of above-mentioned multi-functional LCD display controller, be described in further detail below in conjunction with the control method of accompanying drawing embodiment to multi-functional LCD display controller of the present invention.
Embodiment: as shown in Figure 1, a kind of control method of multi-functional LCD display controller, comprises the following steps:
1. initial video data is stored in a FIFO cache module by video interface module, initial display data is stored in the 2nd FIFO cache module by 8080 interface modules;
2. video processing module obtains the initial video data stored in a FIFO cache module, and Graphics Processing module obtains the initial display data stored in the 2nd FIFO cache module;
3. video data processing command is sent to video processing module by main control module, and display data processing command is sent to Graphics Processing module; Video data processing command comprises the display address of each pixel in the viewing area of LCD display that the convergent-divergent multiple of video data and video data comprise, and display data processing command comprises the display address of each pixel in the viewing area of LCD display that display data comprise;
4. video processing module carries out convergent-divergent process and display address process according to video data processing command to initial video data, obtain video data to be shown, in this video data to be shown, each pixel is distributed in the viewing area of LCD display according to the display address of its correspondence, and video data to be shown is stored in outside the one SDRAM be connected with the first sdram controller by the first sdram controller; Graphics Processing module carries out display address process according to display data processing command to initial display data, obtain display data to be shown, in these display data to be shown, each pixel is distributed in the viewing area of LCD display according to the display address of its correspondence, and display data to be shown are stored in outside the 2nd SDRAM be connected with the second sdram controller by the second sdram controller;
5. main control module sends display and control order to synthesis laminating module, synthesis laminating module carries out synthesis overlap-add procedure according to display and control order to video data to be shown and display data to be shown, obtain preliminary generated data, and preliminary generated data is sent to OSD laminating module;
What 6. outside inputted by OSD laminating module obtains final generated data with shielding in character adding to preliminary generated data and sends to sequential generation module;
7. sequential generation module produces the clock signal that final generated data needs in LCD display display, is shown in LCD display by final generated data.
In the present embodiment, the step display and control order that 5. middle main control module sends is divided into three kinds, is respectively the order of single video output mode, single display data output mode order and the order of picture-in-picture display mode;
When display and control order is the order of single video output mode, synthesis laminating module obtains the video data to be shown of outside first sdram memory storage by the first sdram controller, and is exported as preliminary generated data by this video data to be shown;
When display and control order is single display data output mode order, synthesis laminating module obtains the display data to be shown of outside second sdram memory storage by the second sdram controller, and these display data to be shown is exported as preliminary generated data;
When display and control order is the order of picture-in-picture display mode, synthesis laminating module identifies display address successively according to following rule from the initial display address of the viewing area of LCD display, until arrive the end display address of the viewing area of LCD display: if only there is the pixel of video data to be shown at a display address place of the viewing area of LCD display, then synthesize laminating module the obtains outside first sdram memory storage video data to be shown pixel at this display address place by means of only the first sdram controller; If only there is the pixel of display data to be shown at a display address place of the viewing area of LCD display, then synthesize laminating module the obtains outside second sdram memory storage display data to be shown pixel at this display address place by means of only the second sdram controller; If not only there is the pixel of video data to be shown at a display address place of the viewing area of LCD display but also there is the pixel of display data to be shown, then synthesize laminating module the obtains outside first sdram memory storage video data to be shown pixel at this display address place by means of only the first sdram controller; Each pixel in the video data to be shown obtained is placed on one deck as video data to be synthesized according to its display address by synthesis laminating module, each pixel in the display data to be shown obtained is placed on one deck as display data to be synthesized according to its display address, last layer video data to be synthesized being layered in display data to be synthesized obtains preliminary generated data and exports, and concrete synthetic effect figure as shown in Figure 3.
In the present embodiment, step 6. in OSD laminating module outside input comprise two kinds with screen character adding to the stacked system in preliminary generated data, be respectively covering stacked system and transparency overlay mode:
When for covering stacked system, adopting and directly overriding in preliminary generated data with shielding the pixel that character shows address identical in the viewing area of LCD display with screen character;
When for transparency overlay mode, superpose according to following steps:
A, determine in LCD display, to show the viewing area of address overlap with screen character and preliminary generated data;
The pixel of preliminary generated data that in the viewing area of b, acquisition overlap, each display address is corresponding and the pixel with screen character;
C, red component, green component and blue component according to each transparency overlay pixel corresponding to display address in the viewing area of following formulae discovery overlap:
R＝alpha*R_data+(1-alpha)*R_area
G＝alpha*G_data+(1-alpha)*G_area
B＝alpha*B_data+(1-alpha)*B_area
Wherein * represents and takes advantage of symbol, and R represents the red component of transparency overlay pixel, and G represents the green component of transparency overlay pixel, and B represents the blue component of transparency overlay pixel; Alpha represents transparency, and it is constant and is greater than 0 to be less than 1; R_data represents the red component of the pixel of preliminary generated data, and G_data represents the green component of the pixel of preliminary generated data, and B_data represents the blue component of the pixel of preliminary generated data; R_area represents the red component of the pixel with screen character, and G_area represents the green component of the pixel with screen character, and B_area represents the blue component of the pixel with screen character;
D, R, G and B of calculating in step c be reduced to display address overlap viewing area in transparency overlay pixel corresponding to each display address;
Each transparency overlay pixel obtained in e, employing steps d replaces the pixel at corresponding display address place in preliminary generated data, obtains final generated data.
Claims (4)
1. a multi-functional LCD display controller, is characterized in that comprising main control module, for accessing 8080 interface modules of display interface signal, the video interface module for incoming video signal, a FIFO cache module, the 2nd FIFO cache module, video processing module, Graphics Processing module, synthesis laminating module, OSD laminating module, sequential generation module, the first sdram controller and the second sdram controller;
Described video interface module is connected with a described FIFO cache module, and a described FIFO cache module is connected with described video processing module, and described video processing module is connected with the first described sdram controller; 8080 described interface modules are connected with the 2nd described FIFO cache module, the 2nd described FIFO cache module and described Graphics Processing model calling, and described Graphics Processing module is connected with the second described sdram controller; The first described sdram controller is connected with described synthesis laminating module respectively with the second described sdram controller, described synthesis laminating module is connected with described OSD laminating module, described OSD laminating module and described sequential generation model calling, described main control module is connected with described video processing module, described Graphics Processing module and described synthesis laminating module respectively.
2. a control method for a kind of multi-functional LCD display controller according to claim 1, is characterized in that comprising the following steps:
1. initial video data is stored in a FIFO cache module by video interface module, initial display data is stored in the 2nd FIFO cache module by 8080 interface modules;
2. video processing module obtains the initial video data stored in a FIFO cache module, and Graphics Processing module obtains the initial display data stored in the 2nd FIFO cache module;
3. video data processing command is sent to video processing module by main control module, and display data processing command is sent to Graphics Processing module; Video data processing command comprises the display address of each pixel in the viewing area of LCD display that the convergent-divergent multiple of video data and video data comprise, and display data processing command comprises the display address of each pixel in the viewing area of LCD display that display data comprise;
4. video processing module carries out convergent-divergent process and display address process according to video data processing command to initial video data, obtain video data to be shown, in this video data to be shown, each pixel is distributed in the viewing area of LCD display according to the display address of its correspondence, and video data to be shown is stored in outside the one SDRAM be connected with the first sdram controller by the first sdram controller; Graphics Processing module carries out display address process according to display data processing command to initial display data, obtain display data to be shown, in these display data to be shown, each pixel is distributed in the viewing area of LCD display according to the display address of its correspondence, and display data to be shown are stored in outside the 2nd SDRAM be connected with the second sdram controller by the second sdram controller;
5. main control module sends display and control order to synthesis laminating module, synthesis laminating module carries out synthesis overlap-add procedure according to display and control order to video data to be shown and display data to be shown, obtain preliminary generated data, and preliminary generated data is sent to OSD laminating module;
What 6. outside inputted by OSD laminating module obtains final generated data with shielding in character adding to preliminary generated data and sends to sequential generation module;
7. sequential generation module produces the clock signal that final generated data needs in LCD display display, is shown in LCD display by final generated data.
3. the control method of a kind of multi-functional LCD display controller according to claim 2, it is characterized in that the display and control order that during described step 5., main control module sends is divided into three kinds, be respectively the order of single video output mode, single display data output mode order and the order of picture-in-picture display mode;
When display and control order is the order of single video output mode, synthesis laminating module obtains the video data to be shown of outside first sdram memory storage by the first sdram controller, and is exported as preliminary generated data by this video data to be shown;
When display and control order is single display data output mode order, synthesis laminating module obtains the display data to be shown of outside second sdram memory storage by the second sdram controller, and these display data to be shown is exported as preliminary generated data;
When display and control order is the order of picture-in-picture display mode, synthesis laminating module identifies display address successively according to following rule from the initial display address of the viewing area of LCD display, until arrive the end display address of the viewing area of LCD display: if only there is the pixel of video data to be shown at a display address place of the viewing area of LCD display, then synthesize laminating module the obtains outside first sdram memory storage video data to be shown pixel at this display address place by means of only the first sdram controller; If only there is the pixel of display data to be shown at a display address place of the viewing area of LCD display, then synthesize laminating module the obtains outside second sdram memory storage display data to be shown pixel at this display address place by means of only the second sdram controller; If not only there is the pixel of video data to be shown at a display address place of the viewing area of LCD display but also there is the pixel of display data to be shown, then synthesize laminating module the obtains outside first sdram memory storage video data to be shown pixel at this display address place by means of only the first sdram controller; Each pixel in the video data to be shown obtained is placed on one deck as video data to be synthesized according to its display address by synthesis laminating module, be placed on as display data to be synthesized on one deck using each pixel in the display data to be shown obtained according to its display address, last layer video data to be synthesized being layered in display data to be synthesized obtains preliminary generated data and exports.
4. the control method of a kind of multi-functional LCD display controller according to claim 2, what it is characterized in that outside input by OSD laminating module during described step is 6. comprises two kinds with screen character adding to the stacked system in preliminary generated data, is respectively covering stacked system and transparency overlay mode:
When for covering stacked system, adopting and directly overriding in preliminary generated data with shielding the pixel that character shows address identical in the viewing area of LCD display with screen character;
When for transparency overlay mode, superpose according to following steps:
A, determine in LCD display, to show the viewing area of address overlap with screen character and preliminary generated data;
The pixel of preliminary generated data that in the viewing area of b, acquisition overlap, each display address is corresponding and the pixel with screen character;
C, red component, green component and blue component according to each transparency overlay pixel corresponding to display address in the viewing area of following formulae discovery overlap:
R=alpha*R_data+(1-alpha)*R_area
G=alpha*G_data+(1-alpha)*G_area
B=alpha*B_data+(1-alpha)*B_area
Wherein R represents the red component of transparency overlay pixel, and G represents the green component of transparency overlay pixel, and B represents the blue component of transparency overlay pixel; Alpha represents transparency, and it is constant and is greater than 0 to be less than 1; R_data represents the red component of the pixel of preliminary generated data, and G_data represents the green component of the pixel of preliminary generated data, and B_data represents the blue component of the pixel of preliminary generated data; R_area represents the red component of the pixel with screen character, and G_area represents the green component of the pixel with screen character, and B_area represents the blue component of the pixel with screen character;
D, R, G and B of calculating in step c be reduced to display address overlap viewing area in transparency overlay pixel corresponding to each display address;
Each transparency overlay pixel obtained in e, employing steps d replaces the pixel at corresponding display address place in preliminary generated data, obtains final generated data.
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| CN113938722A (en) * | 2021-12-07 | 2022-01-14 | Tcl华星光电技术有限公司 | Display controller, display control method, and display control system |
| CN115065787A (en) * | 2022-08-18 | 2022-09-16 | 芯见(广州)科技有限公司 | Embedded system video transparent superposition method and device and storage medium |
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