CN112102781A - Demura and SPR integration method and system of display device - Google Patents
Demura and SPR integration method and system of display device Download PDFInfo
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- CN112102781A CN112102781A CN202011196979.6A CN202011196979A CN112102781A CN 112102781 A CN112102781 A CN 112102781A CN 202011196979 A CN202011196979 A CN 202011196979A CN 112102781 A CN112102781 A CN 112102781A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
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Abstract
A Demura and SPR integration method and system of a display device relate to the field of Demura, the display device comprises a main board and a display driving chip, and the Demura integration method comprises the following steps: the main board generates original picture data to be displayed; the main board compensates the original picture data according to the stored Demura compensation data, SPR rendering is carried out on the compensated data on the main board to obtain picture data with a first resolution, and SPR rendering is carried out through the display driving chip to obtain the picture data with the target resolution. The invention integrates the Demura function into the mainboard, avoids the compression of picture data and realizes the full fidelity of the picture.
Description
Technical Field
The invention relates to the field of Demura, in particular to a Demura and SPR (sub Pixel rendering) integration method and system of a display device.
Background
mura is a phenomenon in which, in a display panel manufacturing process, since each film layer has a non-uniform thickness, it has poor electrical (conductive of capacitance/resistance) and optical (refraction & reflection) uniformity, and thus, a human eye may look at the display panel as non-uniform color.
Demura is to compensate the brightness of the unrepaired display panel for the current color mura, and to compensate the entire display panel to a uniform level, so that the effect looks smooth.
As shown in fig. 1, the current OLED display driving chip includes three major parts: the display device comprises a display driving module, a Demura functional module and a plug-in flash chip.
The display driving module includes various functions (such as gamma) for displaying pictures and a corresponding RAM (Random Access Memory).
The Demura function module comprises various logic circuits and corresponding RAMs of the Demura function.
The plug-in flash chip is mainly used for storing relevant data required by the Demura function, and is independently plug-in consideration of the high cost of integration into the display driving chip.
However, in the current display driver chip architecture, on one hand, the whole display driver chip is expensive, and on the other hand, due to limited RAM space, data needs to be compressed twice by the RAM in the display driver module and the RAM in the Demura functional module (i.e., Demura RAM), which easily causes distortion of the display effect.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a Demura and SPR integration method and system of a display device, which integrate the Demura and SPR functions into a mainboard, avoid the compression of picture data and realize the full fidelity of pictures.
To achieve the above object, in one aspect, there is provided a Demura and SPR integration method of a display apparatus including a main board and a display driving chip, the Demura integration method including:
the main board generates original picture data to be displayed;
the main board compensates the original picture data according to the stored Demura compensation data, SPR rendering is carried out on the compensated data on the main board to obtain picture data with a first resolution, and SPR rendering is carried out through the display driving chip to obtain the picture data with the target resolution.
Preferably, the main board includes a ROM, and before the main board compensates the original picture data according to the Demura compensation data stored in the main board, the method further includes:
and burning the Demura compensation data into the ROM or burning the Demura compensation data and a main system of a mainboard into the ROM.
Preferably, the ROM stores a compensation curve generated by fitting Demura compensation data of different gray scales.
Preferably, the SPR rendering of the compensated data on the main board and the display driving chip to obtain the to-be-displayed picture with the target resolution includes:
performing SPR rendering on the compensated data on a main board to obtain picture data with a first resolution, and performing SPR rendering through a display driving chip to obtain the picture data with the target resolution; wherein the first resolution is the same as or different from the original picture data resolution.
Preferably, after SPR rendering is performed on the compensated data on the motherboard to obtain picture data with a first resolution, the picture data is transmitted to the GPU of the motherboard for image processing, and then the picture data after image processing is transmitted to the display driving chip.
Preferably, the first resolution is selected according to the display effect of the test picture at the target resolution.
On the other hand, the integrated system of the Demura and the SPR of the display device comprises a main board and a display panel, wherein the display panel is integrated with a display driving chip, the main board is integrated with a Demura functional module and a first SPR module, and the display driving chip comprises a second SPR module;
the main board stores the Demura compensation data and is also used for generating original picture data;
the Demura function module is used for compensating the original picture data according to the Demura compensation data;
the first SPR module is used for rendering according to the compensated data to obtain picture data with a first resolution;
and the second SPR module is used for rendering the picture data with the first resolution again to obtain the picture data with the target resolution.
Preferably, the first SPR module performs SPR rendering on the compensated data to obtain picture data with a first resolution;
the second SPR module carries out SPR rendering on the picture data with the first resolution ratio to obtain the picture data with the target resolution ratio;
wherein the first resolution is the same as or different from the original picture data resolution.
Preferably, the system further includes a GPU, and the first SPR module renders the picture data with the first resolution, transmits the picture data to the GPU for image processing, and transmits the picture data after image processing to the display driving chip.
Preferably, the first resolution is selected according to the display effect of the test picture at the target resolution.
One of the above technical solutions has the following beneficial effects:
the Demura function is realized through the mainboard, original picture data is compensated through Demura compensation data, the picture data does not need to be compressed in the compensation process, data loss can not be caused due to compression, and full fidelity of the picture is realized.
The main board and the display driving chip are both provided with SPR modules, compensated data are subjected to SPR rendering on the main board and the display driving chip, and under the condition that the physical pixels of the OLED do not reach the target resolution, the data of the picture to be displayed with the target resolution can be obtained, so that full fidelity of the picture is realized, and the OLED display panel is more suitable for the OLED panel.
The compensation process is operated by the mainboard, and because the operation function of the mainboard CPU is far higher than that of the display driving chip, the hardware circuit of the operation can be effectively reduced, and the operation speed is improved.
The Demura compensation data can be burnt to the ROM together with the main system of the mainboard, the whole time is shorter than that of independent burning, and the production efficiency is effectively improved. Besides, a flash chip is not required to be externally hung in the OLED display driving chip, so that the cost of the OLED display driving chip can be effectively reduced.
Drawings
FIG. 1 is a schematic diagram of a prior art Demura system;
FIG. 2 is a flow chart of a method for integrating Demura and SPR in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of a Demura and SPR integrated system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 2, the present invention provides an embodiment of a Demura and SPR integration method of a display device, which specifically includes the following steps:
and S101, generating original picture data to be displayed by the main board.
In a specific implementation, a CPU on the motherboard determines a picture to be displayed, and generates original picture data, such as brightness, gray scale, and the like.
It is understood that the screen to be displayed may be a screen stored in advance or may be a screen received from the outside.
And S102, the main board compensates the original picture data according to the stored Demura compensation data.
Specifically, the main board includes a ROM (Read-Only Memory), and before the original picture data is compensated, the Demura compensation data is first burned into the ROM. The Demura compensation data can be burnt to the ROM together with the main system of the mainboard, time is reduced compared with independent burning, and production efficiency is effectively improved.
In addition, the Demura compensation data is burned into the ROM of the main board, and compared with a flash chip externally hung in an OLED display driving chip, the Demura compensation data can also be conveniently used for compensating the original picture data on the main board.
It should be noted that the Demura compensation data stored in the ROM can be obtained by the testing device and calculation, including: acquiring original brightness data of each pixel of a plurality of groups of fixed pictures through test equipment; taking a central area or whole data of the whole picture, and analyzing to determine a target value (such as an average value); forming Demura compensation data based on the target value (for example, the compensation data is the target value-original value); fitting the Demura compensation data of different gray scales to generate a compensation curve, and curing the compensation curve in a ROM.
The main board is also integrated with a Demura functional module, and the Demura functional module calls Demura compensation data corresponding to the original picture data from the ROM to compensate the original picture. The Demura functional module also includes hardware circuitry for implementing the Demura algorithm.
And S103, performing SPR rendering on the compensated picture data on the main board and the display driving chip to finally obtain the picture data to be displayed with the target resolution.
In specific implementation, SPR rendering is carried out on the data compensated by the Demura functional module on the main board to obtain picture data with a first resolution, and then SPR rendering is carried out through the display driving chip to obtain the picture data with a target resolution.
Wherein the first resolution is the same as or different from the original picture data resolution. When the first resolution is the same as the resolution of the original picture data, the rendering value equivalent to the SPR rendering by the main board is 0.
And selecting the first resolution according to the display effect of the test picture at the target resolution. Specifically, according to the preset target resolution, for the display panels of the same model, the display effect with the best display effect is selected as the first resolution for the main board to perform SPR rendering through the test chart under the target resolution.
In specific implementation, after SPR rendering is performed on the motherboard to obtain picture data with a first resolution, the picture data is transmitted to the GPU of the motherboard to complete image processing, and the picture data after image processing can be transmitted to the display driving chip through the baseband.
The Demura module compensates for the data, and the GPU performs image processing on the data, and converts the picture data into information receivable by the display driver chip in the form of a display protocol.
In the above steps, the compensation process is calculated by the mainboard, and the calculation function of the CPU of the mainboard is far higher than that of the display driving chip, so that the hardware circuit of the calculation can be effectively reduced.
As shown in fig. 3, the present invention may further provide a Demura and SPR integration system of a display device, which includes a main board and a display panel, wherein the display panel is integrated with a display driving chip, the display driving chip includes a second SPR module and a display function module, and the main board is integrated with the Demura function module and the first SPR module.
The main board stores Demura compensation data; the mainboard is also used for generating original picture data;
the Demura function module is used for compensating the original image data generated by the mainboard according to the Demura compensation data;
the first SPR module is used for rendering according to the compensated data to obtain picture data with a first resolution;
the second SPR module is configured to render the image data rendered by the first SPR module again to obtain image data with the target resolution.
Wherein the first resolution may be the same as or different from the original picture data resolution. In the same way, the rendering value equivalent to SPR rendering by the main board is 0. For example, the physical resolution of the original picture data is 2K × 1K, but the target resolution is 4K × 2K. If the rendering value of the first SPR module on the mainboard is 0, the resolution of the mainboard after SPR rendering is still 2K × 1K, and the resolution of the display driving chip after rendering by the second SPR module is 4K × 2K. Alternatively, the first SPR module renders the resolution from 2k × 1k to 3k × 2k, and then renders the resolution from 3k × 2k to 4k × 2k after the second SPR module renders the resolution.
In a specific implementation, the motherboard generates the original picture data through the CPU. The main board comprises a ROM, and the Demura compensation data can be burnt into the ROM or burnt into the ROM together with a main system of the main board.
In a specific implementation, the Demura implementation system further includes a GPU, and the first SPR module renders the image data with the first resolution and transmits the image data to the GPU for image processing, and then transmits the image data after image processing to the display driving chip.
And selecting the first resolution according to the display effect of the test picture at the target resolution.
Preferably, the Demura function module comprises a Demura driving circuit.
The Demura function module can directly adopt the RAM storage space of the mainboard. The Demura function may also include RAM memory space, but RAM memory space is not compressed for picture data.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention.
Claims (10)
1. A Demura and SPR integration method of a display device, the display device comprising a main board and a display driving chip, the Demura integration method comprising:
the main board generates original picture data to be displayed;
the main board compensates the original picture data according to the stored Demura compensation data, SPR rendering is carried out on the compensated data on the main board to obtain picture data with a first resolution, and SPR rendering is carried out through the display driving chip to obtain the picture data with the target resolution.
2. The Demura and SPR integration method of a display device according to claim 1, wherein said main board includes a ROM, and before said main board compensates original picture data according to Demura compensation data stored in said main board, further comprising:
and burning the Demura compensation data into the ROM or burning the Demura compensation data and a main system of a mainboard into the ROM.
3. The Demura and SPR integration method of a display device according to claim 2, wherein said ROM stores compensation curves generated by fitting Demura compensation data of different gray scales.
4. The method for Demura and SPR integration of a display device according to claim 1, wherein said first resolution is different from an original picture data resolution.
5. The Demura and SPR integration method of a display device of claim 4, wherein the compensated data is SPR-rendered on a motherboard to obtain picture data with a first resolution, transmitted to a GPU of the motherboard for image processing, and then transmitted to the display driving chip.
6. The method for Demura and SPR integration of a display device according to claim 4, wherein said first resolution is selected according to a display effect of a test picture at a target resolution.
7. The utility model provides a display device's Demura and SPR integrated system, Demura and SPR integrated system include mainboard and display panel, display panel is integrated with the display driver chip, its characterized in that: the display driving chip comprises a first SPR module and a second SPR module;
the main board stores the Demura compensation data and is also used for generating original picture data;
the Demura function module is used for compensating the original picture data according to the Demura compensation data;
the first SPR module is used for rendering according to the compensated data to obtain picture data with a first resolution;
and the second SPR module is used for rendering the picture data with the first resolution again to obtain the picture data with the target resolution.
8. The integrated Demura and SPR system for a display device of claim 7 wherein said first resolution is different from the original picture data resolution.
9. The integrated Demura and SPR system according to claim 8, wherein said system further comprises a GPU, said first SPR module rendering picture data with a first resolution and transmitting said picture data to said GPU for image processing, and then transmitting said picture data after image processing to said display driver chip.
10. The integrated Demura and SPR system according to claim 8, wherein said first resolution is selected based on the effect of displaying the test picture at a target resolution.
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| TWI785461B (en) * | 2021-01-13 | 2022-12-01 | 敦泰電子股份有限公司 | Display driver circuit system |
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