CN105472106A - Background display method and device - Google Patents
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- CN105472106A CN105472106A CN201410422884.XA CN201410422884A CN105472106A CN 105472106 A CN105472106 A CN 105472106A CN 201410422884 A CN201410422884 A CN 201410422884A CN 105472106 A CN105472106 A CN 105472106A
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- G—PHYSICS
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/60—Memory management
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Abstract
The invention provides a background display method and device. The method comprises the following steps: transmitting image data for an upper application of a terminal to a special memory, wherein the special memory is different with a default display storage buffer area of the terminal in position; carrying out hybrid processing on the image data and a background image selected by a user in the special memory to obtain a mixed image, wherein the mixed image is an image with the background image being the background; and sending back the mixed image to the display storage buffer area for displaying. Through the technical scheme, the problem that user-customized backgrounds cannot be displayed on all interfaces of a mobile phone in the prior art is solved, so that the user-customized backgrounds can be displayed on all interfaces of the mobile phone; the problem that user-customized display style elements of the mobile phone in the prior art are too few can be greatly solved, thereby improving user experience; and the background display method and device have higher commercial value.
Description
Technical field
The present invention relates to the communications field, more particularly, relate to display packing and the device of background.
Background technology
The interface element that current mobile phone is more beautiful is only embodied in wallpaper, several places that screen locking etc. are limited, other such as call interface, it is then unalterable that interface etc. is set, user experience is very poor, does not namely have a kind of method to allow user can freely custom background at all interfaces that mobile phone shows in prior art.
For there is no the problem realizing display customization background at all interfaces of mobile phone in correlation technique, at present effective solution is not yet proposed.
Summary of the invention
The invention provides a kind of display packing and device of background, at least to solve the problem.
According to an aspect of the present invention, provide a kind of display packing of background, described method comprises: the view data of terminal upper layer application is sent to specified memory, and wherein, described specified memory is different from the position of the video memory buffering area that described terminal is given tacit consent to; The background image that described view data and user are selected is carried out mixed processing in described specified memory, obtains mixed image, the image that this mixed image is is background with described background image; Described mixed image is returned to described video memory buffering area show.
Preferably, the view data of terminal upper layer application is reached specified memory, comprising: the second mapping relations the first mapping relations of corresponding for framebuffer device described video memory buffering area being revised as the corresponding described specified memory of described framebuffer device; According to described second mapping relations, described view data is sent to described specified memory.
Preferably, described mixed image is returned to described video memory buffering area and shows, comprising: described mixed image is written in described video memory buffering area with the form of image data format corresponding to described video memory buffering area; Reads image data from described video memory buffering area also shows described view data.
Preferably, described view data also shows by reads image data from described video memory buffering area, comprising: read the view data being written to described video memory buffering area according to predetermined period.
Preferably, the background image that described view data and user are selected is carried out mixed processing in described specified memory, comprising: described view data is configured to the first picture element matrix form; The background image that described user specifies is configured to the second picture element matrix form; Described first picture element matrix form and described second picture element matrix form are carried out hybrid algorithm process.
Preferably, described first picture element matrix form and described second picture element matrix form are carried out hybrid algorithm process, comprising: read the first color of described first picture element matrix form and the second color of described second picture element matrix form; Described first color and described second color are decomposed into three-primary colours RGB respectively; By the R of described first color, each first look of G, B is multiplied by X respectively and obtains the first result, the R of described second color, and each first look of G, B is multiplied by (1-X) respectively and obtains the second result, and wherein, X represents opacity; By the R of the rgb value of described first result and described second result, GB value, according to often kind of color in RGB respectively corresponding addition obtain the 3rd result, RGB tri-chromatic rendition of the 3rd result is the value after carrying out hybrid algorithm process.
Preferably, described method also comprises: receive the operational order of user by interactive interface, one of at least arranges: when described terminal is full frame, for specified application, mixed background image carries out shielding and shows according to described operational order to following; For mixed background image deploy switch key; The transparency parameter of mixed background image is arranged.
Preferably, described specified memory is identical with the size of described video memory buffering area.
According to another aspect of the present invention, additionally provide a kind of display unit of background, described device comprises: delivery module, for the view data of terminal upper layer application is sent to specified memory, wherein, described specified memory is different from the position of the video memory buffering area that described terminal is given tacit consent to; Mixed processing module, carries out mixed processing for the background image described view data and user selected, obtains mixed image in described specified memory, the image that this mixed image is is background with described background image; Display module, shows for described mixed image is returned to described video memory buffering area.
Preferably, described delivery module, comprising: amendment unit, for the first mapping relations of corresponding for framebuffer device video memory buffering area being revised as the second mapping relations of the corresponding described specified memory of described framebuffer device; Delivery unit, for being sent to described specified memory according to the second mapping relations by described view data.
Pass through the present invention, the view data by terminal upper layer application needs is adopted to be sent to specified memory, this specified memory is different from the technical scheme that terminal acquiescence preserves the video memory buffer of the data needed for terminal demonstration image, solve in correlation technique the problem that there is no and realize display customization background at all interfaces of mobile phone, realize all interface display customization backgrounds on mobile phone, greatly can solve the problem that in current phone, customization display styles element is very few, improve user experience, there is higher commercial value.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the display packing of background according to the embodiment of the present invention;
Fig. 2 is working-flow figure according to the preferred embodiment of the invention;
Fig. 3 is the flow chart of the display packing of background according to the preferred embodiment of the invention;
Fig. 4 is the structured flowchart of the display unit of background according to the embodiment of the present invention;
Fig. 5 is another structured flowchart of the display unit of background according to the embodiment of the present invention;
Fig. 6 is the structured flowchart of the display system of background according to the preferred embodiment of the invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification, claims and accompanying drawing and obtain.
It should be noted that, the following technical scheme of the embodiment of the present invention is applicable to one of at least following sight: Linux terminal and Android system.
Embodiments provide a kind of display packing of background, Fig. 1 is the flow chart of the display packing of background according to the embodiment of the present invention, and as shown in Figure 1, the method comprises the steps:
Step S102: the view data of terminal upper layer application is sent to specified memory, wherein, above-mentioned specified memory is different from the position of the video memory buffering area that above-mentioned terminal is given tacit consent to;
Step S104: the background image that above-mentioned view data and user are selected is carried out mixed processing in above-mentioned specified memory, obtains mixed background image, the image that this mixed image is is background with above-mentioned background image;
Step S106: above-mentioned mixed image is returned to above-mentioned video memory buffering area and shows.
By each step above-mentioned, the view data by terminal upper layer application needs is adopted to be sent to specified memory, this specified memory is different from the technical scheme that terminal acquiescence preserves the video memory buffer of the data needed for terminal demonstration image, solve in correlation technique the problem that there is no and realize display customization background at all interfaces of mobile phone, realize all interface display customization backgrounds on mobile phone, greatly can solve the problem that in current phone, customization display styles element is very few, improve user experience, there is higher commercial value.
In specific implementation process, in step S102, the view data of terminal upper layer application is reached specified memory, comprising: the second mapping relations the first mapping relations of corresponding for framebuffer device video memory buffering area being revised as the corresponding above-mentioned specified memory of above-mentioned framebuffer device; According to the second mapping relations, above-mentioned view data is sent to above-mentioned specified memory.
Step S106 can comprise following process: be written in above-mentioned video memory buffering area by above-mentioned mixed background image with the form of image data format corresponding to above-mentioned video memory buffering area; Above-mentioned view data also shows by reads image data from above-mentioned video memory buffering area, and the image after display format conversion, alternatively, read the view data being written to above-mentioned video memory buffering area according to predetermined period.
In an embodiment of the embodiment of the present invention, the background image that above-mentioned view data and user are selected is carried out mixed processing in above-mentioned specified memory, comprising: above-mentioned view data is configured to the first picture element matrix form; The background image that above-mentioned user specifies is configured to the second picture element matrix form; Above-mentioned first picture element matrix form and above-mentioned second picture element matrix form are carried out hybrid algorithm process.
In another embodiment, above-mentioned first picture element matrix form and above-mentioned second picture element matrix form are carried out hybrid algorithm process, comprising: read the first color of above-mentioned first picture element matrix form and the second color of above-mentioned second picture element matrix form; Above-mentioned first color and above-mentioned second color are decomposed into respectively three-primary colours RGB (abbreviation that namely RedGreenBlue is red, green, blue); By the R of above-mentioned first color, each first look of G, B is multiplied by X respectively and obtains the first result, the R of above-mentioned second color, each first look of G, B is multiplied by (1-X) respectively and obtains the second result, wherein, X can represent the opacity of the mixed picture that user pre-sets; By the R of the rgb value of above-mentioned first result and above-mentioned second result, GB value, according to often kind of color in RGB respectively corresponding addition obtain the 3rd result, RGB tri-chromatic rendition of the 3rd result is the value after carrying out hybrid algorithm process.
In order to avoid when seeing a film or play, effect is looked in impact, the embodiment of the present invention also comprises: the operational order being received user by interactive interface, one of at least arrange following according to aforesaid operations instruction: when above-mentioned terminal is full frame, user can specify application, shielding display is carried out when these application run, namely for specified application, mixed background image is carried out shielding display; For mixed background image deploy switch key; The transparency parameter of mixed background image is arranged.
It should be noted that, the view data of the terminal upper layer application of embodiment of the present invention indication can include but not limited to " initial interface view data " or " application image data ", and it refers to the image be shown to before mobile phone does not use the technical scheme of the embodiment of the present invention on screen.
The further improvement of the embodiment of the present invention to technique scheme is, above-mentioned specified memory is identical with the size of above-mentioned video memory buffering area.
In sum, the embodiment of the present invention is passed through the image that should directly be shown on display screen the background selected with user and is shown after algorithm process again, realizes the effect of the beautiful background of display with this any one interface at mobile phone.
The correlation technique that the embodiment of the present invention is used comprises FrameBuffer (framebuffer device) and image procossing.Wherein FrameBuffer is abstract to upper strata of display apparatus, and it provides the mapping of video memory buffering area for upper layer application, and upper strata is by having carried out the operation to video memory buffering area to the read-write of FrameBuffer.After view data is written into video memory buffering area, the Display Driver of bottom can automatically read the data of video memory buffering area and it be shown on a display screen.So the embodiment of the present invention can intercept the image information that will write on screen here and modify to it.Be shown to again after the image information that will show and background picture are made algorithm process on screen and will demonstrate translucent background effect.
In order to better understand the procedure for displaying of above-mentioned background, be described below in conjunction with preferred embodiment, but do not limit the present invention.
Preferred embodiment one
The technical scheme that the embodiment of the present invention adopts is: intercept the view data that will be shown on screen, itself and background icon are done hybrid algorithm process, by the image information display after process on screen.Implementation procedure is as described below:
Step 1: Fig. 2 is working-flow figure according to the preferred embodiment of the invention, and as shown in Figure 2, wherein, LCD is the abbreviation of liquid crystal display LiquidCrystalDisplay, disconnects FrameBuffer and video memory buffering area M
iOthe direct mapping relations of (being equivalent to the video memory buffer in above-described embodiment), make upper layer images data no longer to write direct M
iO.Self-defined one and M simultaneously
iOmemory field M of the same size
l(being equivalent to the specified memory in above-described embodiment), FrameBuffer is mapped to internal memory M
l, on.The view data on such upper strata would not be directly delivered to display apparatus, but passes to the self-defining internal memory M of native system
l.
This process in Andorid platform implementation method is: can call register_FrameBuffer (structfb_info when display apparatus is at kernel initialization
*fb_info) oneself being registered to a global variable structfb_info
*registered_fb [FB_MAX] is inner, can access this global variable, and obtains the fb_info structure fb0 corresponding to display apparatus by coupling fb_info.modename.The value of fb0->fix.mmio_start is exactly the video memory buffering area M that display apparatus obtains when initialization
iOinitial address, it is preserved, is recorded as M
iO_ Start.The value of fb0->fix.mmio_len is then the size of video memory buffering area, and it is expressed as M
iO_ L.We distribute a size in internal memory is M
iOthe space ML of _ L, its initial address is recorded as MMS_Start, be MMS_Start by fb0->fix.mmio_start assignment, in fb_mmap () (defining in linux/drivers/video/fbmem.c), then do corresponding process.At this moment the map section of FrameBuffer is no longer just video memory buffering area M
iO, but M
l, the digital image data on upper strata also can not be directly transferred to display controller, but is passed to M
l.
Step 2: resolve internal memory M
lin view data, be configured to tractable picture element matrix form P-1.The background picture arranged is needed to be P-2.P-1 and P-2 hybrid algorithm is processed, obtains the image PF after processing.PF is reduced to the picture format in internal memory, is write M
iO, make screen drive the image after can reading process and be shown on screen.A monitor is set when FrameBuffer performs write operation, writes at every turn and repeat this process.
Said process is in Android platform implementation method: the corresponding relation of internal storage data and image pixel can from fb0->fix.type or acquisition, and the bit value of pixel can obtain from fb0->var.bits_per_pixel, the pixel quantity on screen is fb0->var.xres (width) * fb0->var.yres (highly).So the Conversion Relations of internal storage data and picture element matrix can be processed according to this relation.And the mixed processing algorithm of P-1 and P-2 is simply described as: suppose that opacity is x, read the color of P-1 and P-2 each point respectively, be decomposed into three-primary colours separately, the color of P-1 is allowed to be multiplied by x, the color of P-2 is multiplied by (1-x), then obtain the respective pixel value of new images PF after their value being added, PF just has required semitransparent background effect.
Step 3: set up interface alternation, makes user can carry out switching manipulation to function, also can arrange background, the parameters such as transparency.And function of shielding when can arrange full frame, can avoid the impact when seeing a film or play to look effect like this.
Preferred embodiment two
Fig. 3 is the flow chart of the display packing of background according to the preferred embodiment of the invention, as shown in Figure 3:
Wherein S302, S304 are user operations, and S306, S308, S310 are the primary flow processs of Android terminal system, and S312, S314, S316, S318 are the parts that native system realizes.
Step S302: when user selects to open service, system can change the mapping relations of FrameBuffer to video memory district, as shown in the S312 of Fig. 3, is revised as and is mapped to the self-defining internal memory M of native system
l.The internal memory that when the view data write FrameBuffer that Android framework will show, (S312) in fact writes just becomes M
l.
Step S316:M
lafter obtaining view data, need M
lon image data analyzing be algorithm easy to handle picture format, and carrying out hybrid operation with the background picture that user is arranged, obtaining the image information PF (S316) with having powerful connections.PF is reduced to internal memory form, is written to the video memory buffering area M starting most to obtain
iO.Display can read these data, and is shown on screen.
Step S314, S316, S318 can constantly repeat, and repetition opportunity is after FrameBuffer is written into data.
Additionally provide a kind of display unit of background in the present embodiment, for realizing above-described embodiment and preferred implementation, having carried out repeating no more of explanation, and below the module related in this device being described.As used below, term " module " can realize the software of predetermined function and/or the combination of hardware.Although the device described by following examples preferably realizes with software, hardware, or the realization of the combination of software and hardware also may and conceived.Fig. 4 is the structured flowchart of the display unit of background according to the embodiment of the present invention.As shown in Figure 4, this device comprises:
Delivery module 40, for the view data of terminal upper layer application is sent to specified memory, wherein, above-mentioned specified memory is different from the position of the video memory buffering area that above-mentioned terminal is given tacit consent to;
Mixed processing module 42, be connected with delivery module 40, background image for above-mentioned view data and user being selected carries out mixed processing in above-mentioned specified memory, obtains mixed background image, the image that this mixed image is is background with above-mentioned background image;
Display module 44, is connected with mixed processing module 42, shows for above-mentioned mixed image is returned to above-mentioned video memory buffering area.
By the comprehensive function of above-mentioned modules, the view data by terminal upper layer application needs is adopted to be sent to specified memory, this specified memory is different from the technical scheme that terminal acquiescence preserves the video memory buffer of the data needed for terminal demonstration image, solve in correlation technique the problem that there is no and realize display customization background at all interfaces of mobile phone, realize all interface display customization backgrounds on mobile phone, greatly can solve the problem that in current phone, customization display styles element is very few, improve user experience, there is higher commercial value.
Alternatively, as shown in Figure 5, delivery module 40, comprising: amendment unit 400, for the first mapping relations of corresponding for framebuffer device video memory buffering area being revised as the second mapping relations of the corresponding above-mentioned specified memory of above-mentioned framebuffer device; Delivery unit 402, is connected, for above-mentioned view data being sent to above-mentioned specified memory according to the second mapping relations with amendment unit 400.
In order to better understand structured flowchart and its workflow of the display unit of above-mentioned background, be described below in conjunction with a preferred embodiment, Fig. 6 is the structured flowchart of the display system of background according to the preferred embodiment of the invention, as shown in Figure 6:
This system main modular comprises: system management module 60, user interactive module 62, image processing module 64.Each functions of modules is described below:
System management module 60 (being equivalent to the delivery module 40 in above-described embodiment): the effect of this module is when native system function is opened, and completes initial work, completes round-off work when native system function is pent.Initialization comprises distribution and M
iOinternal memory M of the same size
l, and by the mapping relations of FrameBuffer by M
iOtransfer to M
l, simultaneously by M
iOinformation preserve as image module for reading and writing 64 is used.Comprise some optimizational functions in addition, such as the function of shielding when being displayed in full screen.Round-off work then comprises the initial mapping relations of reduction FrameBuffer and Memory recycle.
User interactive module 62: this module provides the switch of native system to user.When user opens the function of native system definition time, this module meeting calling module 60 changes the memory-mapped relation of FrameBuffer, during user's closing function, and mapping relations that can be also original initial.This module also provides the interface selecting background picture to user, this Background sector-meeting is used as hybrid algorithm computing by image processing module 64.This module also provides some setting options to user, comprises background transparent degree, shields the options such as native system function when which program is run.
Image module for reading and writing 64 (being equivalent to the function that the mixed processing module 42 of above-described embodiment and display module 44 complete): the effect of this module is by internal memory M
lin image data analyzing become to be easy to the form of algorithm process, and carry out hybrid operation according to the background picture that user selects, obtain the image PF with background image, and PF is reduced to internal storage data form and is filled into initial video memory buffering area M
iO.The data stuffing after process to M
iOafterwards, even if the process in one-period completes, following Display Driver can read M
iOinterior view data is also presented on screen, can repeat this flow process after Frambuffer is write data again.
In sum, the embodiment of the present invention achieves following beneficial effect: solve in correlation technique the problem that there is no and realize display customization background at all interfaces of mobile phone, realize all interface display customization backgrounds on mobile phone, greatly can solve the problem that in current phone, customization display styles element is very few, improve user experience, there is higher commercial value.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a display packing for background, is characterized in that, described method comprises:
The view data of terminal upper layer application is sent to specified memory, and wherein, described specified memory is different from the position of the video memory buffering area that described terminal is given tacit consent to;
The background image that described view data and user are selected is carried out mixed processing in described specified memory, obtains mixed image, the image that this mixed image is is background with described background image;
Described mixed image is returned to described video memory buffering area show.
2. method according to claim 1, is characterized in that, the view data of terminal upper layer application is reached specified memory, comprising:
First mapping relations of corresponding for framebuffer device described video memory buffering area are revised as the second mapping relations of the corresponding described specified memory of described framebuffer device;
According to described second mapping relations, described view data is sent to described specified memory.
3. method according to claim 2, is characterized in that, described mixed image is returned to described video memory buffering area and shows, comprising:
Described mixed image is written in described video memory buffering area with the form of image data format corresponding to described video memory buffering area;
Reads image data from described video memory buffering area also shows described view data.
4. method according to claim 3, is characterized in that, reads image data from described video memory buffering area, comprising:
The view data being written to described video memory buffering area is read according to predetermined period.
5. method according to claim 1, is characterized in that, the background image that described view data and user are selected is carried out mixed processing in described specified memory, comprising:
Described view data is configured to the first picture element matrix form;
The background image that described user specifies is configured to the second picture element matrix form;
Described first picture element matrix form and described second picture element matrix form are carried out hybrid algorithm process.
6. method according to claim 5, is characterized in that, described first picture element matrix form and described second picture element matrix form is carried out hybrid algorithm process, comprising:
Read the first color of described first picture element matrix form and the second color of described second picture element matrix form;
Described first color and described second color are decomposed into three-primary colours RGB respectively;
By the R of described first color, each first look of G, B is multiplied by X respectively and obtains the first result, the R of described second color, and each first look of G, B is multiplied by (1-X) respectively and obtains the second result, and wherein, X represents opacity;
By the rgb value of the rgb value of described first result and described second result, according to often kind of color in RGB respectively corresponding addition obtain the 3rd result, RGB tri-chromatic rendition of the 3rd result is the value after carrying out hybrid algorithm process.
7. the method according to any one of claim 1-6, is characterized in that, also comprises:
Receive the operational order of user by interactive interface, one of at least arrange following according to described operational order:
When described terminal is full frame, for specified application, mixed background image is carried out shielding display; For mixed background image deploy switch key; The transparency parameter of mixed background image is arranged.
8. the method according to any one of claim 1-6, is characterized in that, described specified memory is identical with the size of described video memory buffering area.
9. a display unit for background, is characterized in that, described device comprises:
Delivery module, for the view data of terminal upper layer application is sent to specified memory, wherein, described specified memory is different from the position of the video memory buffering area that described terminal is given tacit consent to;
Mixed processing module, carries out mixed processing for the background image described view data and user selected, obtains mixed image in described specified memory, the image that this mixed image is is background with described background image;
Display module, shows for described mixed image is returned to described video memory buffering area.
10. device according to claim 9, is characterized in that, described delivery module, comprising:
Amendment unit, for being revised as the second mapping relations of the corresponding described specified memory of described framebuffer device by the first mapping relations of corresponding for framebuffer device described video memory buffering area;
Delivery unit, for being sent to described specified memory according to described second mapping relations by described view data.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410422884.XA CN105472106A (en) | 2014-08-25 | 2014-08-25 | Background display method and device |
| PCT/CN2014/087846 WO2015117345A1 (en) | 2014-08-25 | 2014-09-29 | Method and device for displaying background |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410422884.XA CN105472106A (en) | 2014-08-25 | 2014-08-25 | Background display method and device |
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| CN105472106A true CN105472106A (en) | 2016-04-06 |
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| CN201410422884.XA Withdrawn CN105472106A (en) | 2014-08-25 | 2014-08-25 | Background display method and device |
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| WO (1) | WO2015117345A1 (en) |
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| CN116245706A (en) * | 2023-05-09 | 2023-06-09 | 深圳市乐升半导体有限公司 | Pixel mixing method and device for base map and png map |
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| CN112543363B (en) * | 2020-12-04 | 2022-11-22 | 海看网络科技(山东)股份有限公司 | Method for configuring background in IPTV diversification |
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| CN101388107A (en) * | 2008-08-01 | 2009-03-18 | 四川长虹电器股份有限公司 | Method for reducing flickering display for embedded browsers |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116245706A (en) * | 2023-05-09 | 2023-06-09 | 深圳市乐升半导体有限公司 | Pixel mixing method and device for base map and png map |
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