CN111341264A - Optical compensation data transmission device of display panel - Google Patents
Optical compensation data transmission device of display panel Download PDFInfo
- Publication number
- CN111341264A CN111341264A CN201811552033.1A CN201811552033A CN111341264A CN 111341264 A CN111341264 A CN 111341264A CN 201811552033 A CN201811552033 A CN 201811552033A CN 111341264 A CN111341264 A CN 111341264A
- Authority
- CN
- China
- Prior art keywords
- data
- compensated
- panel
- processing device
- video
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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]
- G09G3/3225—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] using an active matrix
-
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
-
- 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
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2370/00—Aspects of data communication
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides an optical compensation data transmission device of a display panel, which comprises a signal connecting plate, a video processing device and a cloud server, wherein the signal connecting plate is connected with the video processing device; the signal connecting board is connected with a panel to be compensated and used for receiving picture configuration data and a serial number from the panel to be compensated; the video processing device is connected with the signal connecting plate and used for receiving the picture configuration data and the serial number from the panel to be compensated, recording the picture configuration data and the serial number as identification data and generating brightness compensation data corresponding to the panel to be compensated according to an algorithm; the cloud server is used for receiving the identification data and the brightness compensation data stored in the video processing device through a network; the video processing device downloads the brightness compensation data based on the identification data from the cloud server through the network, and the panel to be compensated receives the brightness compensation data through the video processing device and the signal connecting plate to perform optical correction. Therefore, the processing speed and cost of the simplified hardware are shared, and the back-end operation time is saved.
Description
Technical Field
The invention relates to the technical field of defect correction of display panels, in particular to a compensation data transmission device for carrying out a brightness non-uniformity elimination process aiming at optical defects of an AMOLED display panel.
Background
The active matrix organic light emitting diode display (AMOLED display) panel mainly comprises a thin film transistor layer composed of a plurality of thin film transistors and an organic light emitting diode layer corresponding to the thin film transistors, wherein the organic light emitting diode layer comprises a plurality of organic light emitting diodes arranged in a matrix form, each organic light emitting diode is called a sub-pixel, and each sub-pixel is driven by the corresponding thin film transistor.
Since the organic light emitting diode is a current driving device and the characteristics of each unit of the thin film transistor driving device are slightly different, the brightness difference of the panel is very large. The difference between the characteristics of the thin film transistor and the organic light emitting diode results in the non-uniform brightness of the organic light emitting diode module, i.e. the non-uniform brightness of the display (Mura issue). In the OLED panel, the sub-pixel circuit is mainly used to compensate the variation of the operation threshold voltage (Vth) characteristic of the driving thin film transistor. However, this compensation method cannot compensate for variations in other parameters of the thin film transistor and the characteristics of the organic light emitting diode. Therefore, most of the current display manufacturers use an external compensation method to perform optical compensation (referred to as "De-mura") to make the oled emit uniform brightness. The external brightness unevenness removal technique can be roughly divided into an electrical detection compensation method and an optical detection compensation method. The external electrical compensation method usually provides voltage to each OLED display pixel by an external driving circuit, detects the current-voltage (I-V) characteristic of each display pixel, and calculates the compensation coefficient of each sub-pixel to correct the image data.
However, the electrical detection compensation method can only detect the characteristics of the thin film transistor or the organic light emitting diode in advance with pure electrical property, and cannot detect the brightness difference finally presented by the organic light emitting diode. And thus the unevenness of the brightness cannot be completely compensated for. The external optical compensation method is to directly detect the brightness information of each sub-pixel in the OLED panel by an optical instrument.
The operation mode comprises the following steps: a. the brightness information of each sub-pixel of the OLED panel is recorded by a precise optical instrument. b. The compensation parameters for each sub-pixel are calculated and generated. c. The compensation parameters are compressed and written into a Flash memory. d. When displaying, the driving circuit reads the compensation information from the fast writing memory and decompresses it, and then the driving circuit modifies the image data according to the compensation information and provides it to the organic light emitting diode for displaying. However, the external optical compensation method requires an optical device with a very high resolution to detect the brightness of each sub-pixel, and basically suggests an optical device requiring at least four times the resolution of the pixels on the screen. Such high resolution requires more time and space for capturing pictures/operations/data transmission/storage.
Referring to fig. 1A, on a small-sized panel 1 (e.g., a mobile phone system), a Flash memory chip 12(Flash) is disposed beside a Driver IC (Driver IC) to store panel Mura information, and when the mobile phone 1 is powered on, the Driver IC 11 reads Mura compensation data from the Flash memory chip 12 and sends the compensated data to the panel 1 to complete the compensation of Mura. Referring to fig. 1B, on a large-sized panel 2 (e.g., a pen or television system), a Flash memory chip 22(Flash) is disposed beside a timing controller 21(TCON) to store panel Mura information, and when a notebook computer or television system is turned on, the timing controller 21 reads compensation data from the Flash memory chip 22 and sends the compensated data to the panel 2 via a signal connection board 23(X/B board) and a driving chip 24 to complete the Mura correction.
However, the flash memory chip in the lcd device is used to store configuration data, which is usually data of the lcd panel to be compensated for displaying normally, such as overdrive data, mura data, white balance data, and color shift data. The flash memory chip is arranged on the signal connecting plate, so that the volume of the signal connecting plate is large, and the integration of the liquid crystal display device is not facilitated.
In view of the above, the present inventors have made diligent experiments and studies to provide an optical compensation data transmission apparatus for a panel to be compensated without a flash memory chip to share and simplify the processing speed and cost of hardware and save the back-end operation time.
Disclosure of Invention
The invention aims to: the optical compensation data transmission device of the panel to be compensated is provided, and the technical problems in the prior art are solved.
To achieve the purpose of the present invention, a technical solution provided by the present invention is as follows:
an optically compensated data transmission device of a display panel, comprising: the system comprises a signal connecting plate, a video processing device and a cloud server; the signal connecting board is used for connecting a panel to be compensated and receiving picture configuration data and a serial number from the panel to be compensated; the video processing device is used for connecting the signal connecting plate, receiving the picture configuration data and the serial number corresponding to the panel to be compensated from the panel to be compensated and recording the picture configuration data and the serial number as identification data, and the video processing device is used for generating brightness compensation data corresponding to the panel to be compensated according to an algorithm; the cloud server is used for receiving the identification data and the brightness compensation data stored in the video processing device through a network; the video processing device downloads the brightness compensation data based on the identification data from the cloud server through the network, and the panel to be compensated receives the brightness compensation data through the video processing device and the signal connecting plate to perform optical correction.
In one possible design, a video processing device includes: the device comprises a data reading module, a protocol conversion module, an operation processing module and a data output module; the data reading module is used for reading the picture configuration data and the serial number; the protocol conversion module is used for converting the picture configuration data into initial configuration data and initial video data respectively according to a preset protocol and converting the serial number into identification data; the operation processing module is used for operating the initial configuration data and the initial video data and adjusting the gray-scale value or the voltage of the pixel unit in the position area to be compensated to generate brightness compensation data, and the brightness compensation data comprises first correction configuration data and first correction video data; the data output module is used for outputting first correction configuration data, first correction video data and identification data.
In one possible design, the video processing device further comprises a timing controller component, wherein the timing controller component comprises a data parsing module and a video control module, and the data parsing module is used for receiving the first correction configuration data and the first correction video data from the video processing device and converting the first correction configuration data and the first correction video data into a second correction configuration data and a second correction video data according to a preset protocol; the video control module is used for outputting second correction configuration data and second correction video data to the panel to be compensated for optical correction after being electrified.
In a possible design, the video control module outputs a preset picture signal when the second compensation configuration data and the second compensation video data are not completely output, and the preset picture signal is used for enabling the panel to be compensated to display a full black picture of a preset frame through the signal connection board.
In one possible design, the first initial configuration data and the first corrected configuration data converted by the preset protocol are sent in the form of data packets; the data packet comprises a start frame, an end frame, a data frame and a check frame; the start frame is used for indicating the beginning of the data packet, the length of the data packet and the start address of the data packet; the end frame is a mark for indicating the end of the data packet; the data frame is used for recording the brightness compensation data; the check frame is used for checking the correctness of the transmitted data.
In one possible design, the checking the correctness of the transmitted data employs any one of the aforementioned cyclic redundancy check, MD5message digest algorithm, or secure hash algorithm.
In one possible design, the video processing device employs a television-related system-on-chip or MCU chip.
In one possible design, the data reading module, the protocol conversion module, the operation processing module and the data output module are integrated in a system-on-chip or an MCU chip.
In one possible design, the algorithm calculates the modified gray level according to the gamma value and the target brightness, and generates the brightness compensation data according to a single calculation of a uniform gamma value or a gamma curve.
In one possible design, the panel to be compensated includes any one of a smart phone, an internet device, an electronic book, a tablet computer, a portable player station, a portable mobile electronic device of a personal digital assistant, or any one of large-sized display devices such as a pen, a liquid crystal display, a liquid crystal television, and the like.
Drawings
Fig. 1A is a schematic diagram of a prior art small-sized panel optical compensation data transmission device.
Fig. 1B is a schematic diagram of a large-sized panel optical compensation data transmission device in the prior art.
Fig. 2 is a schematic configuration diagram of an optical compensation data transmission apparatus according to an embodiment of the invention.
Fig. 3 is a schematic configuration diagram of an optical compensation data transmission apparatus according to another embodiment of the present invention.
Description of reference numerals: 1-small size panel; 11-a driving chip; 12-a flash memory chip; 2-large size panel; 21-a time schedule controller; 22-flash memory chip; 3-a panel to be compensated; 30-optically compensated data transmission means; 31-a signal connection board; 32-a video processing device; 33-cloud server; 4-a panel to be compensated; 40-an optically compensated data transmission device; 41-signal connection board; 42-a timing control device; 421-a data parsing module; 422-video control module; 43-a video processing device; 431-a data reading module; 432-protocol conversion module 432; 433-an operation processing module; 434-data output module 434; 44-cloud server; CB1, CB 2-sequence number; DA1, DA 2-Picture configuration data; d21-initial configuration data; d22-original video data; DB1, DB 2-identifying data; MA1 — first correction configuration data; MA 2-first corrected video data; MA 1' -second correction arrangement data; MA 2' -second corrected video data; MD1, MD 2-brightness compensation data.
Detailed Description
The following detailed description and technical contents of the present invention are described with reference to the drawings, which are provided for reference and illustration purposes only and are not intended to limit the present invention. Various embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to only these embodiments. The invention is intended to cover alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the invention. In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details.
Generally, when a liquid crystal display device is used, a Mura (moire) defect phenomenon caused by uneven brightness exists, so when the display device displays content through a screen with the Mura defect, information received by a viewer includes two parts, namely original content and Mura information, and since the Mura information affects the viewing experience of the viewer, the Mura defect is generally suppressed through a De-Mura method. The De-Mura method aims to obtain a De-Mura compensation coefficient by analyzing Mura information in a screen, adjust display content, namely De-Mura processing, and inhibit and eliminate the Mura information contained in the display content, so that the viewing effect of the display content is improved. In an exemplary method for De-Mura processing, display content in a screen is calibrated through a standard white field gray scale signal to obtain a position of the screen which is brighter than brightness of corresponding display content of the screen under the standard white field gray scale, brightness suppression is performed on the position which is brighter than the brightness of the corresponding display content of the screen in combination with a De-Mura compensation coefficient, brightness enhancement is performed on the position which is darker than the brightness of the corresponding display content of the screen in the screen to enable the position to be close to the brightness of the corresponding display content of the screen, and Mura defects of the screen under each gray scale are suppressed through the processing.
The embodiment of the present invention provides an optical compensation data transmission device for a panel to be compensated, which is known from the background art, wherein a flash memory chip is used for storing a frame configuration data of the panel to be compensated, the frame configuration data is usually data when the panel to be compensated normally displays, for example: mura data, white balance data, and color shift data, etc. …. The flash memory chip obtains the brightness data of the whole panel to be compensated through the CCD camera, then utilizes the De-mura algorithm to compensate the brightness data, and writes the corrected data into the control chip or an internal memory (flash) in the time sequence controller. The optical compensation data transmission device mainly utilizes the cloud end to store the optical compensation data of the panel to be compensated, and a storage device is not required to be independently arranged in a control chip or a time schedule controller to store all the compensation data, so that the possibility of saving equipment space and reducing equipment cost is brought.
Fig. 2 is a configuration diagram of an optical compensation data transmission device according to an embodiment of the invention. As shown in fig. 2, in the present embodiment, the optical compensation data transmission device is used to execute two procedures, i.e., mura compensation data uploading and mura compensation downloading, so as to perform a De-mura operation on a panel 3 to be compensated. The optical compensation data transmission device 30 includes a signal connection board 31, a video processing device 32 and a cloud server 33.
The signal connection board 31 is respectively connected to the panel 3 to be compensated and the video processing device 32, and the signal connection board 31 is used for transmitting a picture configuration data DA1 and a serial number CB1 corresponding to the panel to be compensated to the video processing device 32 for data processing.
The video processing device 32 is used for receiving the frame configuration data DA1 and the serial number corresponding to the panel 3 to be compensated and recording the serial number as an identification data DB1, and the video processing device 32 is used for generating a brightness compensation data MD1 corresponding to the panel to be compensated according to an algorithm; to explain further, the Mura information of the panel 3 to be compensated corresponds to a short identification code (DriverID), which is written in an On Time Programmable (OTP) memory of the driver chip (driver) due to its small capacity, and is received and stored by the video processing device 32; further, the video processing device 32 includes a processor, which may include, for example, a general purpose microprocessor, an instruction set processor and/or associated chipset and/or a special purpose microprocessor (e.g., an Application-specific integrated circuit (ASIC)), and so forth.
The processor may be a single processing unit or a plurality of processing units to perform the different actions of the method flow according to embodiments of the present invention. The processor may also include on-board memory for caching purposes. The processor may be a single processing unit or a plurality of processing units to perform different actions according to embodiments of the invention. The processor can perform brightness uniformity calculation on the picture configuration data DA1, select a reference point of brightness reference, and further perform brightness comparison calculation on pixels at positions to be compensated to obtain brightness compensation data to be adjusted and brightness compensation data MD1 for adjusting gray-scale values or voltages of pixel units in positions to be compensated (Mura), so that an excessively dark area is brightened, and an excessively bright area is darkened, and a uniform display effect is achieved.
In the specific embodiment, when the De-mura technology is applied to actual production, not only a good display effect but also short time consumption are required. A good and practical De-mura algorithm is required. The De-mura algorithm that may be used by the processor of the video processing device 32 of the present invention may be to calculate a corrected gray level value based on a Gamma (Gamma) value and a target brightness. In the AMOLED panel, the luminance compensation data MD1 is generated by a single calculation according to a uniform gamma value or a gamma curve to achieve the mura compensation effect.
The cloud server 33 is configured to receive the identification data DB1 corresponding to the panel to be compensated 3 and the brightness compensation data MD1 stored in the video processing device 32 through the network. In an embodiment, the cloud server 33 includes a processor, which may include, for example, a general-purpose microprocessor, an instruction set processor and/or related chipset, and/or a special-purpose microprocessor (e.g., an Application-specific integrated circuit (ASIC)), and so on. The video processing device 32 may download the brightness compensation data MD1 based on the identification data DB1 from the cloud server 33 through the network, and the panel 3 to be compensated receives the brightness compensation data MD1 through the video processing device 32 and the signal connection board 31 for mura correction.
Fig. 3 is a configuration diagram of an optical compensation data transmission apparatus according to another embodiment of the present invention. In the present embodiment, the optical compensation data transmission device is used to execute two procedures of the mura compensation data uploading and the mura compensation downloading, and the De-mura operation is performed on the panel 4 to be compensated by executing the procedures. The optical compensation data transmission device 40 includes a signal connection board 41, a timing controller 42, a video processing device 43 and a cloud server 44. Wherein the timing control device 42 includes a data parsing module 421 and a video control module 422; the video processing device 43 includes a data reading module 431, a protocol conversion module 432, an arithmetic processing module 433, and a data output module 434.
The signal connection board 41 is connected to the panel 4 to be compensated and the timing controller 43, respectively, and the signal connection board 41 is used for transmitting a frame configuration data DA2 to the timing controller 43, and the video processing device 42 receives the analyzed data from the timing controller 43 and then performs data processing.
The video processing device 43 is used for receiving the frame configuration data DA2 and a serial number CB2 of the panel 4 to be compensated and recording the serial number CB2 as identification data DB2, and the video processing device 42 is used for generating brightness compensation data MD2 corresponding to the panel to be compensated according to an algorithm; to explain further, the Mura information of the panel 3 to be compensated corresponds to a short identification code (driverID), which is written in an on-chip (driver) one-time programmable (OTP) memory due to its small capacity, and is received and stored by the video processing device 42.
The video processing device 42 may be a System On Chip (SOC) video processing device or a Micro Controller Unit (MCU) video processing device associated with a television. Video processing device 42 includes a processor, which may include, for example, a general purpose microprocessor, an instruction set processor and/or associated chipset and/or a special purpose microprocessor (e.g., an Application-specific integrated circuit (ASIC)), or the like. The processor may be a single processing unit or a plurality of processing units to perform the different actions of the method flow according to embodiments of the present invention. The processor may also include on-board memory for caching purposes. The processor may be a single processing unit or a plurality of processing units to perform different actions according to embodiments of the invention. The processor can perform brightness uniformity calculation on the picture configuration data DA2, select a reference point of brightness reference, and further perform brightness comparison calculation on pixels at positions to be compensated to obtain brightness compensation data to be adjusted and brightness compensation data MD2 for adjusting gray-scale values or voltages of pixel units in positions to be compensated (Mura), so that an excessively dark area is brightened, and an excessively bright area is darkened, and a uniform display effect is achieved.
In the specific embodiment, when the De-mura technology is applied to actual production, not only a good display effect but also short time consumption are required. A good and practical De-mura algorithm is required. The De-mura algorithm that may be used by the processor of the video processing device 42 of the present invention may be to calculate a modified gray level value based on a Gamma (Gamma) value and a target brightness. In the AMOLED panel, the luminance compensation data MD1 is generated by a single calculation according to a uniform gamma value or a gamma curve to achieve the mura compensation effect.
In an embodiment, the data reading module 431 is configured to read the screen configuration data DA2 and the serial number CB2 of the panel 4 to be compensated. The protocol conversion module 432 is used for converting the screen configuration data DA2 into an initial configuration data DA21 and an initial video data DA22 according to a predetermined protocol, and converting the serial number of the panel 4 to be compensated into an identification data DB2 for transmission and analysis. The operation processing module 433 is configured to perform an operation on the initial configuration data DA21 and the initial video data DA22 for image brightness uniformity, select a reference point of a brightness reference, further perform brightness comparison on a pixel at a position to be compensated to calculate brightness compensation data to be adjusted, and adjust a gray scale value or a voltage of a pixel unit in a position to be compensated (Mura) region to generate brightness compensation data MD2, which includes a first correction configuration data MA1 and a first correction video data MA 2. The data output module 433 is used for outputting the first corrected configuration data MA1, the first corrected video data MA2 and the identification data DB 2.
The cloud server 44 is configured to receive the identification data DB2 of the video processing device 43 corresponding to the panel 3 to be compensated, the first correction configuration data MA1, and the first correction video data MA2 via the network. In an embodiment, the cloud server 33 includes a processor, which may include, for example, a general-purpose microprocessor, an instruction set processor and/or related chipset, and/or a special-purpose microprocessor (e.g., an Application-specific integrated circuit (ASIC)), and so on. The cloud server 44 calculates the first corrected configuration data MA1 and the first corrected video data MA2 as luminance compensation data MD2, and stores the luminance compensation data MD 2; the video processing device 43 may download the brightness compensation data MD2 based on the identification data DB2 from the cloud server 44 through the network; the panel 4 to be compensated receives the brightness compensation data MD2 through the video processing device 43, the timing control device 42 and the signal connection board 41 for optical correction (e.g., De-mura).
In the embodiment, the data parsing module 421 in the timing control device 42 is configured to receive the luminance compensation data MD2 from the video processing device 43 and convert the luminance compensation data MD2 into a second correction configuration data MA1 'and a second correction video data MA 2' according to a predetermined protocol. The video control module 422 is configured to output the second corrected configuration data MA1 'and the second corrected video data MA 2' after power-up, and output a predetermined picture signal (not shown) when the second corrected configuration data MA1 'and the second corrected video data MA 2' are not completely output.
In an embodiment, the signal connection board 41 is used for transmitting the preset picture signal and the second corrected configuration data MA1 'and the second corrected video data MA 2' outputted by the timing controller 42. The signal connection board 41 is used to provide the second corrected configuration data MA1 'and the second corrected video data MA 2' outputted by the timing controller 42 with the predetermined picture signal to the panel 4 to be compensated. To explain further, the preset frame signal is used to make the panel 4 to be compensated display a full black frame of a preset frame. It is understood that the specific value of the preset frame can be adjusted according to the output completion time of the video control module 422. The preset picture signal enables the panel 4 to be compensated to display a full black picture of a preset number of frames, so that the correctness of the data in the subsequent transmission of the brightness compensation data MD2 can be ensured. Because the lcd device 1 cannot enter a stable operating state for a while immediately after being powered on, if the video control module 422 directly outputs the second correction configuration data MA1 'and the second correction video data MA 2', the panel 4 to be compensated may not normally display the corrected video image, and the displayed video image may have abnormal images such as distortion.
Therefore, the video control module 422 outputs the preset picture signal after power-on and when the output of the brightness compensation data MD2 is not completed; at this time, the panel 4 to be compensated displays a full black frame of the predetermined frame and synchronously outputs the second compensation configuration data MA1 'and the second compensation video data MA 2' so as to output the compensated display data (e.g., over-driving data, mura data, white balance data, color shift data, etc. …) to the panel 4 to be compensated.
In an embodiment, the first initial configuration data DA21, the first corrected configuration data MA1, and the second corrected configuration data MA 1' converted by the preset protocol may be sent in the form of a data packet; the data packet includes a start frame, an end frame, a data frame and a check frame. The start frame indicates the beginning of the packet, the length of the packet, and the start address of the packet. The end frame is an identifier indicating the end of the packet. The data frame stores luminance compensation data. The check frame is used for checking the correctness of the transmitted data.
In one embodiment, the Check may be performed by Cyclic Redundancy Check (CRC), MD5Message Digest Algorithm (MD5Message-Digest Algorithm), or Secure Hash Algorithm (SHA). It should be added that Cyclic Redundancy Check (CRC) is a hash function that generates a short fixed bit check code according to data such as network data packets or computer files, and is mainly used to detect or check errors that may occur after data transmission or storage, and uses the principles of division and remainder to detect whether a transmission error occurs during data packet transmission; the MD5message digest algorithm is a widely used cryptographic hash function that generates a 128-bit (16-byte) hash value to ensure the integrity of the message transmission; secure Hash Algorithm (SHA) is a family of cryptographic hash functions, which is a FIPS-certified secure hash algorithm that can calculate a fixed-length string (also called a message digest) corresponding to a digital message.
In a specific embodiment, the data reading module 431, the protocol conversion module 432, the operation processing module 433, and the data output module 434 are integrated in a System On Chip (SOC); the data parsing module 421 and the video Control module 422 are integrated in a timing Control chip (TCON).
In the above embodiments, the processor in the video processing device (32,43) or the cloud server (33,44) may be any medium capable of containing, storing, transmitting, propagating or transmitting instructions, for example. For example, a readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, device, or propagation medium. Specific examples of the readable storage medium include: magnetic storage devices such as magnetic tape or Hard Disk (HDD); optical storage devices, such as optical disks; a Memory, such as a Random Access Memory (RAM) or a flash Memory; and/or wired/wireless communication links; furthermore, a computer program may be included, which may comprise code/computer executable instructions that, when executed by a processor, cause the processor to perform an embodiment according to the invention. The computer program may be configured with computer program code, for example comprising computer program modules.
For example, in an example embodiment, code in the computer program may include one or more program modules. It should be noted that the division and number of modules are not fixed, and those skilled in the art may use suitable program modules or program module combinations according to actual situations, which when executed by a processor, enable the processor to perform the method according to the embodiments of the present invention or any variations thereof.
In the above embodiments, the panels (3,4) to be compensated include, but are not limited to, Portable Mobile electronic devices such as Smart phones (Smart phones), Internet devices (MIDs), electronic books, tablet computers, Portable Play Stations (PSPs), Personal Digital Assistants (PDAs), or large-size display devices such as pen phones, liquid crystal displays, and liquid crystal televisions.
According to the embodiments of the present invention, when the electronic device is started, the video processing device may read the identification data (DB1, DB2) of the panel to be compensated, such as the serial number (Driver ID) of the panel to be compensated, and the video processing device may communicate with the cloud server, send the identification data corresponding to the panel to be compensated to the cloud server or the server cluster, and request to obtain the brightness compensation data (MD1, MD2) of each panel to be compensated. After the compensation data returned by the cloud is correctly obtained, the video processing device may send the luminance compensation data MD to a display driving integrated circuit (not shown) in the panel to be compensated, so as to compensate the display process.
Compared with the prior art, the optical compensation data transmission device of the invention uploads Mura compensation information to the cloud server by using a network so as to omit Flash hardware on the signal connection board 31 or the timing control device 42, the Mura compensation information of each panel is uniformly recorded by the cloud server, no matter whether the panel corresponds to a small-size panel or a large-size panel, the system can acquire a panel identification code in a driver IC when the device is started, and captures the corresponding Mura compensation information through the network and sends the Mura compensation information to a driver IC or a TCON IC to light the panel so as to complete Mura compensation of the panel; the following advantages are effectively realized:
1. flash storage devices on the liquid crystal module can be saved.
2. The area and the space of the FPC of the mobile phone can be reduced, so that the arrangement of other electronic components of the whole mobile phone is facilitated.
And 3, the Mura data is controlled by the cloud, so that the damage of a Flash hardware storage device is not easy to worry.
And 4, the Mura data is controlled by the cloud, and subsequent data can be updated conveniently and the algorithm can be upgraded.
The foregoing description shows and describes several preferred embodiments of the invention, but as before, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments, and that various other combinations, modifications, and environments may be used, and changes may be made within the scope of the inventive concept herein, either by the above teachings or by the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An optical compensation data transmission apparatus of a display panel, the optical compensation data transmission apparatus of the display panel comprising: the system comprises a signal connecting plate, a video processing device and a cloud server;
the signal connecting board is used for connecting a panel to be compensated and receiving picture configuration data and a serial number from the panel to be compensated;
the video processing device is used for connecting the signal connecting board, receiving the picture configuration data and the serial number corresponding to the panel to be compensated from the panel to be compensated and recording the picture configuration data and the serial number as identification data, and the video processing device is used for generating brightness compensation data corresponding to the panel to be compensated according to an algorithm; and
the cloud server is used for receiving the identification data and the brightness compensation data stored in the video processing device through a network;
the video processing device downloads the brightness compensation data based on the identification data from the cloud server through a network, and the panel to be compensated receives the brightness compensation data through the video processing device and the signal connecting board to perform optical correction.
2. The optical compensation data transmission apparatus of a display panel according to claim 1, wherein the video processing device further comprises:
a data reading module for reading the image configuration data and the serial number;
the protocol conversion module is used for respectively converting the picture configuration data into initial configuration data and initial video data according to a preset protocol and converting the serial number into the identification data;
an operation processing module, configured to perform an operation on the initial configuration data and the initial video data and adjust a gray scale value or a voltage of a pixel unit in a to-be-compensated position area to generate the luminance compensation data, where the luminance compensation data includes a first correction configuration data and a first correction video data; and
a data output module for outputting the first correction configuration data, the first correction video data and the identification data.
3. The optically compensated data transmission device of claim 2, further comprising a timing control device, the timing control device comprising:
a data parsing module for receiving the first correction configuration data and the first correction video data from the video processing device and converting the first correction configuration data and the first correction video data into a second correction configuration data and a second correction video data according to a predetermined protocol; and
and the video control module is used for outputting the second correction configuration data and the second correction video data to the panel to be compensated for optical correction after being electrified.
4. The apparatus for transmitting optically compensated data of a display panel according to claim 3, wherein the video control module outputs a predetermined frame signal when the second compensation configuration data and the second compensation video data are not completely outputted, and the predetermined frame signal is used to make the panel to be compensated display a full black frame through the signal connection board.
5. The apparatus for transmitting optically compensated data for a display panel according to claim 2, wherein the first initial configuration data and the first corrected configuration data converted by the predetermined protocol are transmitted in the form of data packets; the data packet comprises a start frame, an end frame, a data frame and a check frame;
the start frame is used for indicating the beginning of a data packet, the length of the data packet and the start address of the data packet;
the end frame is an identifier for indicating the end of the data packet;
the data frame is used for recording brightness compensation data; and
the check frame is used for checking the correctness of the transmitted data.
6. The optically compensated data transmission device of a display panel according to claim 5 wherein the transmitted data is verified for correctness by any one of a cyclic redundancy check, MD5message digest algorithm or secure hash algorithm.
7. The optically compensated data transmission device of a display panel according to claim 2, wherein the video processing device employs a television-related system-on-chip or MCU chip.
8. The apparatus according to claim 7, wherein the data reading module, the protocol conversion module, the arithmetic processing module, and the data output module are integrated in the system-on-chip or the MCU chip.
9. The apparatus for transmitting optically compensated data of a display panel according to any one of claims 1 to 8, wherein the algorithm calculates the modified gray level according to the gamma value and the target brightness, and generates the brightness compensation data according to a single calculation of a uniform gamma value or a gamma curve.
10. The apparatus for optically compensating data transmission of a display panel according to any one of claims 1 to 8, wherein the panel to be compensated comprises any one of a smart phone, an internet appliance, an electronic book, a tablet computer, a portable broadcasting station, a portable mobile electronic device of a personal digital assistant, or any one of a large-sized display device such as a pen-type, a liquid crystal display, a liquid crystal television.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811552033.1A CN111341264A (en) | 2018-12-19 | 2018-12-19 | Optical compensation data transmission device of display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811552033.1A CN111341264A (en) | 2018-12-19 | 2018-12-19 | Optical compensation data transmission device of display panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111341264A true CN111341264A (en) | 2020-06-26 |
Family
ID=71187834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811552033.1A Pending CN111341264A (en) | 2018-12-19 | 2018-12-19 | Optical compensation data transmission device of display panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111341264A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114038435A (en) * | 2021-11-16 | 2022-02-11 | Tcl华星光电技术有限公司 | Display compensation method and display compensation device |
| WO2022037051A1 (en) * | 2020-08-20 | 2022-02-24 | 武汉精测电子集团股份有限公司 | Cloud-based display panel mura correction method and system |
| CN114724506A (en) * | 2021-01-04 | 2022-07-08 | 北京小米移动软件有限公司 | Electronic equipment, display method, display device and storage medium |
| TWI800285B (en) * | 2022-03-03 | 2023-04-21 | 緯創資通股份有限公司 | Method for aligning color of display and related computer system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5883985A (en) * | 1996-12-10 | 1999-03-16 | General Electric Company | Method for compensating image data to adjust for characteristics of a network output device |
| JPH11282937A (en) * | 1998-03-31 | 1999-10-15 | Fuji Photo Film Co Ltd | Medical network system |
| CN107396022A (en) * | 2017-08-22 | 2017-11-24 | 深圳市华星光电技术有限公司 | Data transmission device and liquid crystal display device |
| CN107680554A (en) * | 2017-11-22 | 2018-02-09 | 深圳市华星光电技术有限公司 | Display device drive system and method |
| CN108538239A (en) * | 2018-04-02 | 2018-09-14 | 厦门强力巨彩光电科技有限公司 | A kind of LED display bearing calibration and system based on high in the clouds control |
| CN108898991A (en) * | 2018-07-25 | 2018-11-27 | 昆山国显光电有限公司 | The acquisition of offset data and transmission method and intelligent terminal |
-
2018
- 2018-12-19 CN CN201811552033.1A patent/CN111341264A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5883985A (en) * | 1996-12-10 | 1999-03-16 | General Electric Company | Method for compensating image data to adjust for characteristics of a network output device |
| JPH11282937A (en) * | 1998-03-31 | 1999-10-15 | Fuji Photo Film Co Ltd | Medical network system |
| CN107396022A (en) * | 2017-08-22 | 2017-11-24 | 深圳市华星光电技术有限公司 | Data transmission device and liquid crystal display device |
| CN107680554A (en) * | 2017-11-22 | 2018-02-09 | 深圳市华星光电技术有限公司 | Display device drive system and method |
| CN108538239A (en) * | 2018-04-02 | 2018-09-14 | 厦门强力巨彩光电科技有限公司 | A kind of LED display bearing calibration and system based on high in the clouds control |
| CN108898991A (en) * | 2018-07-25 | 2018-11-27 | 昆山国显光电有限公司 | The acquisition of offset data and transmission method and intelligent terminal |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022037051A1 (en) * | 2020-08-20 | 2022-02-24 | 武汉精测电子集团股份有限公司 | Cloud-based display panel mura correction method and system |
| CN114724506A (en) * | 2021-01-04 | 2022-07-08 | 北京小米移动软件有限公司 | Electronic equipment, display method, display device and storage medium |
| CN114038435A (en) * | 2021-11-16 | 2022-02-11 | Tcl华星光电技术有限公司 | Display compensation method and display compensation device |
| CN114038435B (en) * | 2021-11-16 | 2023-02-03 | Tcl华星光电技术有限公司 | Display compensation method and display compensation device |
| TWI800285B (en) * | 2022-03-03 | 2023-04-21 | 緯創資通股份有限公司 | Method for aligning color of display and related computer system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111341264A (en) | Optical compensation data transmission device of display panel | |
| US10657905B2 (en) | Method and apparatus for compensating for brightness of display device | |
| US10636345B2 (en) | Method of compensating in display panel, driving unit and display panel | |
| US10937365B2 (en) | Temperature compensation method and device, and display apparatus | |
| US7593008B2 (en) | Electro-optical apparatus, driving method thereof, and electronic device | |
| CN106531045B (en) | Time schedule controller and display device comprising same | |
| WO2015188605A1 (en) | Optical compensation device of display panel, display panel, and optical compensation method for display panel | |
| US10755633B2 (en) | Compensation method and compensation device, display apparatus, display method and storage medium | |
| US10276085B2 (en) | Pixel signal compensation for a display panel | |
| CN111223445A (en) | Optical compensation data transmission method of display panel | |
| US11238797B2 (en) | Pixel driving method, pixel driving device and display device | |
| CN109036290B (en) | Pixel driving circuit, driving method and display device | |
| US8159478B2 (en) | Display device and electronic device using the same | |
| US10939082B2 (en) | Processor, display driver, and electronic device | |
| CN111105760A (en) | Mura compensation method and system of display equipment and display equipment | |
| KR102487518B1 (en) | Data driving circuit and display apparatus having the same | |
| CN105761656B (en) | Conditional compression for display self-update | |
| US20150042671A1 (en) | Data Compression System for Liquid Crystal Display and Related Power Saving Method | |
| CN111554236A (en) | Aging compensation data transmission device of organic light emitting diode display panel | |
| CN111724749A (en) | Display driving method, display driving device and display device | |
| US20110157465A1 (en) | Look up table update method | |
| US20230011399A1 (en) | Method, Apparatus, Electronic Device And Storage Medium For Processing Pixel Data | |
| US20210280111A1 (en) | Method of generating correction data for display device, test device, and display device | |
| US8994630B2 (en) | Display, apparatus and method for driving display | |
| CN111968557A (en) | Compensation method and compensation system of backlight module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200626 |