WO2020143666A1 - 像素补偿方法、像素补偿装置及显示装置 - Google Patents
像素补偿方法、像素补偿装置及显示装置 Download PDFInfo
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- 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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- 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]
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Definitions
- Embodiments of the present disclosure relate to a pixel compensation method, pixel compensation device, and display device.
- each sub-pixel unit needs to be compensated to improve the display performance of the display panel.
- At least one embodiment of the present disclosure provides a pixel compensation method.
- the pixel compensation method includes:
- the compensation value of the sub-pixel in the next detection period is determined according to the gray-scale data and the compensation value and the sensed value of the sub-pixel in the current detection period.
- the pixel compensation method further includes:
- a source voltage signal is generated according to the preset grayscale data of the sub-pixels and the compensation value in the next detection period, and output to the source driver.
- the determining that the sub-pixel is below according to the gray-scale data and the compensation value and the sensed value of the sub-pixel in the current detection period The compensation value within a detection period, including:
- the compensation offset value change amount and the compensation gain value of the sub-pixel in the next detection period and the compensation value in the current detection period determine that the sub-pixel is in the next detection period The compensation value within the detection period.
- the multiple gray-scale data according to the sub-pixels in the current detection period, multiple sensing values corresponding to the multiple gray-scale data, and the Compensating the offset value and determining the brightness curve of the sub-pixel includes:
- the line is determined as follows:
- V1 represents the first grayscale data
- V2 represents the second grayscale data
- S1 represents the first brightness sensing value
- S2 represents the second brightness sensing value
- K2 represents the compensation gain value
- Vth represents the compensation offset value
- ⁇ Vth represents the amount of change in the compensation offset value
- ⁇ Vth Vth 1 -Vth
- Vth 1 represents the sub-pixel turn-on voltage value
- the compensation deviation of the sub-pixel in the next detection period is determined according to the luminance curve of the sub-pixel and the ideal luminance curve of the sub-pixel Shift value and compensation gain value, including:
- the ideal brightness curve is expressed as follows:
- ST1 represents the first ideal brightness data
- ST2 represents the second ideal brightness
- the change amount of the compensation offset value and the compensation gain value of the sub-pixel in the next detection period are determined according to the following formula:
- the generation is performed based on the preset grayscale data of the sub-pixels and the compensation value in the next detection period
- Source voltage signal including:
- the source voltage signal is calculated by the following formula:
- Data1 represents the preset grayscale data
- Data2 represents the source voltage signal
- LUT represents the mapping function
- At least one embodiment of the present disclosure also provides a pixel compensation device.
- the pixel compensation device includes:
- An algorithmic compensation circuit configured to generate a source voltage signal based on the grayscale data and compensation value of the subpixel in the current detection period to control the light emission luminance of the subpixel;
- the coefficient calculation circuit is configured to be based on the gray-scale data and the compensation value of the sub-pixel in the current detection period and on the basis of the light-emission luminance provided by the sub-pixel driven by the source voltage signal The generated sensing value determines the compensation value of the sub-pixel in the next detection period.
- the pixel compensation apparatus further includes: a light sensing device,
- the light sensing device is configured to generate the sensed value according to the light emission luminance of the sub-pixel.
- the algorithm compensation circuit is further configured to, in the next detection period, according to the preset grayscale data of the sub-pixels and the compensation in the next detection period The value generates a source voltage signal and outputs it to the source driver.
- the pixel compensation device further includes:
- the brightness conversion circuit is configured to receive the gray-scale data of the sub-pixels and convert the gray-scale data into a brightness voltage signal for output to the algorithm compensation circuit.
- the pixel compensation device further includes:
- the timing control circuit is configured to receive a timing signal and generate a source voltage signal for controlling the source driver and a gate voltage signal of the gate driver according to the timing signal.
- At least one embodiment of the present disclosure also provides a pixel compensation device, including:
- a memory configured to store instructions, which when executed by the processor causes the processor to perform the following operations:
- At least one embodiment of the present disclosure also provides a display device.
- the display device includes any of the aforementioned pixel compensation devices.
- FIG. 1 is a flowchart of a pixel compensation method provided by at least one embodiment of the present disclosure
- FIG. 2 is a flowchart of another pixel compensation method provided by at least one embodiment of the present disclosure.
- step S300 is a flowchart of step S300 in a pixel compensation method provided by at least one embodiment of the present disclosure
- FIG. 4 is a schematic diagram of a display device provided by at least one embodiment of the present disclosure.
- FIG. 5 is a structural diagram of a sub-pixel circuit provided by at least one embodiment of the present disclosure.
- FIG. 6 is a schematic structural diagram of the timing controller in FIG. 4;
- FIG. 7 is a schematic diagram of ideal brightness curves and actual brightness curves of sub-pixels provided by at least one embodiment of the present disclosure
- FIG. 8 is a schematic block diagram of a pixel compensation device provided by at least one embodiment of the present disclosure.
- FIG. 9 is a schematic structural diagram of a computer system suitable for implementing a pixel compensation method or a pixel compensation device according to an embodiment of the present disclosure.
- the compensation methods used to improve the image quality mainly include TFT compensation (mobility K and threshold voltage Vth), OLED compensation (efficiency E), and external optical compensation (each sub-pixel obtained by CCD shooting
- TFT compensation mobility K and threshold voltage Vth
- OLED compensation efficiency E
- external optical compensation each sub-pixel obtained by CCD shooting
- the compensation amount at different brightness is composed of slope K1 and offset K2), temperature compensation (T), etc.
- the most compensation factors are 6 (K, Vth, E, K1, K2, T), which makes the compensation algorithm of OLED pixels more and more complicated, and it is impossible to distinguish the role of each factor in the compensation method, thus Caused the problem of inaccurate compensation.
- At least one embodiment of the present disclosure provides a pixel compensation method, including:
- the compensation value of the sub-pixel in the next detection period is determined according to the gray-scale data and the compensation value and the sensed value of the sub-pixel in the current detection period.
- FIG. 1 is a flowchart of a pixel compensation method provided by at least one embodiment of the present disclosure. As shown in FIG. 1, the pixel compensation method includes:
- Step S100 In the current detection period, generate a source voltage signal according to the grayscale data and compensation values of multiple sub-pixels to control the light-emitting brightness of each sub-pixel;
- Step S200 Generate a sensing value according to the current light-emitting luminance of each sub-pixel
- Step S300 Determine the compensation value of each sub-pixel in the next detection period according to the gray-scale data of each sub-pixel, the sensing value, and the compensation value of the current period.
- the compensation value in the next detection cycle determined in step S300 is also used in the next display cycle.
- the pixel compensation method provided by the embodiment of the present disclosure can determine the compensation value of each sub-pixel in the next detection period according to the gray-scale data, the sensing value and the compensation value of each sub-pixel in the current detection period.
- the comprehensive aging of each sub-pixel unit can be obtained, and the corresponding sensed value can be output, and then the sensed value can be used to determine that each sub-pixel is in the next Detect the compensation value of the cycle to compensate for the overall aging of the entire pixel of each sub-pixel unit, which can solve the problems of afterimages and the phenomenon of various traces caused by uneven brightness of multiple sub-pixels at once, simplifying the sub-pixel compensation algorithm and improving the Pixel compensation accuracy.
- the pixel compensation method provided by at least one embodiment of the present disclosure further includes:
- Step S400 In the next detection period, a source voltage signal is generated according to the preset grayscale data of each sub-pixel and the compensation value in the next detection period, and output to the source driver.
- the pixel compensation method provided by the embodiments of the present disclosure is not limited to, for each sub-pixel, use the sensing value generated according to the light-emitting luminance of the sub-pixel to determine the compensation value of the sub-pixel in the next detection period.
- the sensing value generated by the emission luminance of other sub-pixels can also be used to determine the compensation value of the sub-pixel in the next detection period.
- the sensing value based only on the emission luminance of a part of sub-pixels, and use the sensing value generated according to the emission luminance of the part of sub-pixels to determine the compensation of the part of sub-pixels in the next detection period
- the value and the compensation value of another part of the sub-pixel in the next detection period are not limited by the embodiments of the present disclosure.
- step S100 in the current detection period, a source voltage signal is generated according to the gray-scale data and compensation values of a plurality of sub-pixels to control the light-emission brightness of each sub-pixel.
- each sub-pixel in the current detection period, during a frame interval, each sub-pixel generates a plurality of source voltage signals based on a plurality of gray-scale data combined with compensation values, and each sub-pixel generates different light emission luminances based on the plurality of source voltage signals.
- step S200 a sensing value is generated according to the current light emission luminance of each sub-pixel.
- each sub-pixel obtains the comprehensive aging of each sub-pixel, output the corresponding sensed value, and then use the sensed value to determine the compensation value of each sub-pixel in the next detection cycle, thereby compensating each sub-pixel
- the overall aging situation of the entire pixel of the system solves the problems of afterimages and the phenomenon of various traces caused by uneven brightness of multiple subpixels at one time.
- a photosensitive device such as a PIN junction
- a PIN junction When each sub-pixel generates corresponding brightness according to the grayscale data, light is projected onto the PIN junction. When the intensity of received light is greater, the current through the PIN junction is greater, thereby Using the PIN junction can obtain the comprehensive aging situation of each sub-pixel, and then output the corresponding sensing value.
- step S300 the compensation value of each sub-pixel in the next detection cycle is determined according to the gray-scale data of each sub-pixel, the sensing value, and the compensation value of the current cycle. As shown in FIG. 3, step S300 includes steps S310-S330:
- Step S310 Determine the brightness curve of each sub-pixel according to multiple gray-scale data of each sub-pixel, multiple sensing values, and the compensation offset value of the current detection period.
- the grayscale data and the sensed values of each sub-pixel may correspond to two respectively, for example, the grayscale data includes first grayscale data and second grayscale data, such as V1 and V2, and the compensation value of the current period includes compensation Offset value Vth, based on two sensed values determined by V1+Vth and V2+Vth, a first brightness sense value and a second brightness sense value, such as S1 and S2, preset sub-pixel actual compensation gain value K2 And the turn-on voltage Vth 1 to determine the brightness curve function of each sub-pixel as:
- V1+Vth, S1, V2+Vth, S2, and the brightness curve of the fitted sub-pixel are taken as the X coordinate value, and S1 and S2 are taken as the Y coordinate value.
- Step S320 Determine the compensation offset value change amount and the compensation gain value of each sub-pixel in the next detection period according to the brightness curve of each sub-pixel and the ideal brightness curve of each sub-pixel.
- the calculation formula of the ideal brightness of each subpixel is:
- ST1 is the first ideal brightness data
- ST2 is the second ideal brightness data
- K1 is the ideal compensation gain value.
- the first ideal brightness data ST1, the second ideal brightness data ST2 and the ideal compensation gain value K1 are preset.
- the first ideal brightness data ST1, the second ideal brightness data ST2, and the ideal compensation gain value K1 may be theoretically derived or experimentally measured, which is not limited in the embodiments of the present disclosure.
- the preset compensation offset value change amount ⁇ Vth to obtain the calculation formula of the actual brightness of the sub-pixel:
- the dotted line is the ideal brightness curve of the sub-pixel, and the solid line is the actual brightness curve.
- the unit of the abscissa is the gray scale data V, and the unit of the ordinate is the brightness L.
- the compensation offset value change amount ⁇ Vth and the compensation gain value K2 of each sub-pixel in the next detection period can be determined.
- Step S330 Determine the compensation value of each sub-pixel in the next detection period according to the compensation offset value change amount of each sub-pixel in the next detection period, the compensation gain value, and the compensation value of the current period.
- the compensation value of each sub-pixel in the next detection cycle includes a compensation offset value and a compensation gain value K2.
- the compensation offset value of each sub-pixel in the next detection cycle is the compensation offset value Vth of the current cycle and the compensation offset of the next detection cycle Sum of shift value change amount ⁇ Vth.
- step S400 in the next detection period, a source voltage signal is generated according to the preset grayscale data and the compensation value of each sub-pixel, and output to the source driver.
- the grayscale data is preset, and then the source voltage signal is generated according to the preset grayscale data and the compensation value in the next detection cycle, and the source voltage signal calculation formula is :
- Data1 is the preset gray scale data
- Data2 represents the source voltage signal
- LUT is the mapping function
- a sub-pixel when each sub-pixel is compensated for the first time, a sub-pixel can be compensated by presetting a compensation value as a reference in the initial detection period, and then the sub-pixel compensation value in the next detection period can be calculated according to the preset compensation value Calculation is performed to determine the compensation value of each sub-pixel in the next detection cycle.
- the compensation value calculated according to the calculation is used for compensation, and then the compensation value for the next detection cycle is calculated according to the compensation value, so that the sub-pixels are compensated in different detection cycles in this way.
- the detection period may be one frame, two frames, or more frames of pixels.
- the detection period may also be a preset time period, and the compensation calculation is performed during the frame interval between two adjacent time periods.
- a person skilled in the art may set the detection period, which is not limited in the embodiments of the present disclosure.
- the pixel compensation method may further include: generating a source voltage signal according to the gray-scale data of the sub-pixel in the next display period and the compensation value in the next detection period to control the sub-pixels to be under The luminous brightness within a display period.
- At least one embodiment of the present disclosure also provides a pixel compensation device
- the pixel compensation device includes an algorithm compensation circuit 105 and a coefficient calculation circuit 102.
- FIG. 4 is a schematic diagram of a display device provided by at least one embodiment of the present disclosure
- FIG. 6 is a schematic structural diagram of the timing controller 10 in FIG. 4.
- the above pixel compensation device may be included in the timing controller 10 of the display device, however, it should be understood that the embodiments of the present disclosure are not limited thereto.
- the above-mentioned pixel compensation device may be separately provided and signal-connected to the timing controller 10.
- the algorithm compensation circuit 105 is used to generate a source voltage signal according to the grayscale data and compensation values of multiple sub-pixels in the current detection period to control the light-emission brightness of each sub-pixel;
- the coefficient calculation circuit 102 is used to determine the compensation value of each sub-pixel in the next detection period according to the gray-scale data, the sensing value and the compensation value of the current period of each sub-pixel.
- the pixel compensation device provided in at least one embodiment of the present disclosure can determine the compensation value of each sub-pixel in the next detection period based on the gray-scale data, the sensing value, and the compensation value of each sub-pixel in the current detection period.
- the compensation value for the next detection cycle it is only necessary to obtain the comprehensive aging of each sub-pixel according to the current light emission luminance of each sub-pixel, output the corresponding sensing value, and then determine each sub-pixel through the coefficient calculation circuit 102
- the compensation value in the next detection cycle can solve the problem of afterimages and the phenomenon of various traces caused by uneven brightness of multiple sub-pixels at once, simplify the sub-pixel compensation, improve the accuracy of pixel compensation, and improve the display of the display device quality.
- the pixel compensation device may further include a light sensing device for generating a sensing value according to the current light emission luminance of each sub-pixel.
- the light-sensitive device may be attached to the outer surface of the display panel in an externally attached manner; or, the light-sensitive device may be provided in the display panel corresponding to the position of the light-emitting element of each sub-pixel, embodiments of the present disclosure There are no restrictions on this.
- the algorithm compensation circuit 105 is also used to generate a source voltage signal according to the grayscale data of each sub-pixel and the compensation value in the next detection period, and output to the source driver 20 to implement compensation for each sub-pixel.
- the algorithm compensation circuit 105 is used to generate a source voltage signal according to the grayscale data of a plurality of sub-pixels and the compensation value of the current detection period in the current detection period to control the light-emission brightness of each sub-pixel.
- the light-sensing device may be a PIN junction P.
- the PIN junction P When each sub-pixel generates corresponding brightness according to the gray-scale data, light is projected onto the PIN junction P, and the PIN junction P is used to sense the comprehensive aging of each sub-pixel. The corresponding sensing value is output.
- the coefficient calculation circuit 102 is used to determine the compensation value of each sub-pixel in the next detection period according to the gray-scale data, the sensing value and the compensation value of the current period of each sub-pixel.
- the grayscale data and the sensed values of each sub-pixel may correspond to two respectively, for example, the grayscale data includes first grayscale data and second grayscale data, such as V1 and V2, and the compensation value of the current period is the compensation
- the offset value Vth, and the two sensed values determined according to V1+Vth and V2+Vth, the first brightness sensed value and the second brightness sensed value, such as S1 and S2, preset the actual compensation gain value of the sub-pixel K2 and the turn-on voltage Vth 1 determine the brightness function of each sub-pixel as:
- the coefficient calculation circuit 102 fits the luminance curve of the sub-pixels through V1+Vth, S1, V2+Vth, S2, and uses V1+Vth and V2+Vth as the X coordinate values, and S1 and S2 as the Y coordinate values.
- more sensing data such as S3 can be obtained through more gray-scale data, such as V3, and then through three sets (V1+Vth, S1, V2+Vth, S2, V3+Vth, S3) or more There are multiple groups to fit the voltage-brightness curve of each sub-pixel. Those skilled in the art should understand that using more sets of sensing data can make the actual compensation gain value K2 more accurate, and thus can make the brightness curve obtained by calculation more accurate.
- the coefficient calculation circuit 102 determines the compensation offset value change amount and the compensation gain value of each sub-pixel in the next detection period according to the luminance curve of each sub-pixel and the ideal luminance curve of each sub-pixel.
- the ideal brightness curve of each sub-pixel is obtained.
- the gray-scale data is the first gray-scale data and the second gray-scale data, such as V1 and V2
- the calculation formula of the ideal brightness of each sub-pixel is:
- ST1 is the first ideal brightness data
- ST2 is the second ideal brightness data
- K1 is the ideal compensation gain value.
- the first ideal brightness data ST1, the second ideal brightness data ST2 and the ideal compensation gain value K1 are preset.
- the first ideal brightness data ST1, the second ideal brightness data ST2, and the ideal compensation gain value K1 may be theoretically derived or experimentally measured, which is not limited in the embodiments of the present disclosure.
- the preset compensation offset value change amount ⁇ Vth to obtain the calculation formula of the actual brightness of the sub-pixel:
- the dotted line is the ideal brightness curve of the sub-pixel, and the solid line is the actual brightness curve.
- the unit of the abscissa is the gray scale data V, and the unit of the ordinate is the light emission luminance L.
- the coefficient calculation circuit 102 obtains the calculation formula of the actual compensation gain value K2 according to the calculation formula of the ideal brightness of the sub-pixel and the calculation formula of the actual brightness:
- algorithm compensation circuit 105 is also used to generate a source voltage signal according to the grayscale data of each sub-pixel and the compensation value in the next detection period.
- the grayscale data is preset, and the algorithm compensation circuit 105 passes through the preset grayscale data and the compensation offset value change amount ⁇ Vth and the compensation gain value K2 of the next detection period.
- the source voltage signal is generated by calculation, and the calculation formula of the source voltage signal is:
- Data1 is the preset gray scale data
- Data2 represents the source voltage signal
- LUT Look-Up Table
- the algorithm compensation circuit 105 is further configured to generate a source voltage signal according to the gray-scale data of the sub-pixel in the next display period and the compensation value in the next detection period to control the sub-pixel in the next display period Luminous brightness.
- the pixel compensation device further includes a brightness conversion circuit 104.
- the brightness conversion circuit 104 is used to receive the gray-scale data of the sub-pixels and convert the gray-scale data into a brightness voltage signal for output to the algorithm compensation circuit 105.
- the gray-scale data is color data RGB
- the brightness conversion circuit 104 converts the color data RGB into corresponding brightness voltage signals for output to the algorithm compensation circuit 105.
- the pixel compensation device further includes a data output circuit 106.
- the data output circuit 106 is used to generate a source voltage digital signal according to the source voltage signal for output to the source driver 20, so as to control the brightness of the sub-pixels.
- the pixel compensation device further includes a timing control circuit 101.
- the timing control circuit 101 is used to receive the timing control signal Timing, generate a source voltage signal SCS (Source Control Signal) output to the source driver 20, generate a gate voltage signal GCS (Gate Control Signal) output to the gate driver 30, generate The light emitting voltage EVD (Emitting Voltage) is preset to the light voltage setting device.
- SCS Source Control Signal
- GCS Gate Control Signal
- one or more of the timing control circuit 101, the coefficient calculation circuit 102, the brightness conversion circuit 104, the algorithm compensation circuit 105, and the data output circuit 106 may use PLD (programmable logic device), CPLD (complex It is implemented by circuits such as programming logic devices), FPGA (field programmable gate array), FPOA (field programmable object array), ASIC (application specific integrated circuit), etc.
- PLD programmable logic device
- CPLD complex It is implemented by circuits such as programming logic devices
- FPGA field programmable gate array
- FPOA field programmable object array
- ASIC application specific integrated circuit
- a display device includes a timing controller 10, a source driver 20, a gate driver 30, a memory 40 and a display panel 50.
- the timing controller 10 includes the above-mentioned pixel compensation device (for example, including the timing control circuit 101, brightness conversion circuit 104, algorithm compensation circuit 105, data output circuit 106, coefficient calculation circuit 102 ), and storage control circuit 103 .
- the timing control circuit 101 is used to receive the timing control signal Timing, generate the source voltage signal SCS and output it to the source driver 20, and generate the gate voltage signal GCS;
- the brightness conversion circuit 104 receives the color data RGB, and The color data RGB is converted into a brightness voltage signal;
- the algorithm compensation circuit 105 receives the brightness voltage signal, and reads the compensation value of the current detection period from the memory 40, and outputs the source voltage signal through calculation according to the brightness voltage signal and the compensation value;
- the data output circuit 106 Receive the source voltage signal and convert the source voltage number into a source voltage digital signal;
- the source driver 20 receives the source voltage digital signal to control the sub-pixel to emit light;
- the light-sensing device outputs the sensed value according to the illumination of the sub-pixel ,
- the source driver 20 receives the sensed value and outputs the sensed value SData to the timing controller 10;
- the coefficient calculation circuit 102 of the timing controller 10 receives the sensed value, and according to the voltage signal, the sensed
- the sub-pixel circuit includes at least one light emitting element, such as an OLED, a cathode of the light emitting element
- the cathode voltage ELVSS is connected, the anode is connected to the source of the drive transistor T1; the drain of the drive transistor T1 is connected to the anode voltage ELVDD of the light emitting element, the gate is connected to the drain of the switching transistor T2; the gate of the switching transistor T2 and the first scan line GL
- the source is connected to the data line DL; the storage capacitor Cst is connected between the drain of the switching transistor T2 and the source of the driving transistor T1.
- the sub-pixel circuit shown in FIG. 5 is an example of the above-described sub-pixel, and the embodiments of the present disclosure are not limited thereto.
- the gate voltage signal GCS controls the gate of the switching transistor T2 through the first scan line GL; after the source luminance data passes through the source driver 20, the source driving voltage Vdata is obtained, and then the sub-pixel is input through the data line DL
- the source of the switching transistor T2 of the cell is further input to the gate of the driving transistor T1; the source voltage signal SCS is mainly used to control the timing of the source driver 20, such as when to output the source voltage signal.
- the anode voltage ELVDD and the cathode voltage ELVSS can set the operating voltage by the light emitting voltage setter.
- the sub-pixel circuit also includes a light-sensitive device for detecting the brightness of the light-emitting element.
- the light sensing device is implemented as a PIN junction P.
- a storage capacitor C is connected in parallel with the PIN junction P
- the anode of the PIN junction P is connected to a light-sensing display voltage V0
- the source of the switching transistor T3 is connected to the cathode of the PIN junction P
- the gate is connected to the second sweep line GL2
- the drain is connected to The sensing line SL is connected.
- sensing of the actual light emitting brightness of the light emitting element based on the brightness voltage is realized.
- the light-sensitive display voltage V0 of the PIN junction P can be shared with the voltage signal of the light-emitting element OLED.
- the light-sensing device may be included in the pixel compensation device, which is not limited by the embodiments of the present disclosure.
- the detection period may be one frame, two frames, or more frames of pixels.
- the detection period may also be a preset time period, and the compensation calculation is performed during the frame interval between two adjacent time periods.
- a person skilled in the art may set the detection period, which is not limited in the embodiments of the present disclosure.
- the pixel compensation device provided by the embodiment of the present disclosure can be used to implement the pixel compensation method provided by the embodiment of the present disclosure, and has the beneficial effects of the pixel compensation method.
- FIG. 9 shows a schematic structural diagram of a computer system 900 suitable for implementing a pixel compensation method or a pixel compensation device according to an embodiment of the present disclosure.
- the computer system 900 includes a central processing unit (CPU) 901 that can be loaded into a random access memory (RAM) 903 from a program stored in a read-only memory (ROM) 902 or from a storage section 908 Instead, perform various appropriate actions and processing.
- RAM random access memory
- ROM read-only memory
- various programs and data necessary for the operation of the system 900 are also stored.
- the CPU 901, ROM 902, and RAM 903 are connected to each other through a bus 904.
- An input/output (I/O) interface 905 is also connected to the bus 904.
- the following components are connected to the I/O interface 905: an input section 906 including a keyboard, a mouse, etc.; an output section 907 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 908 including a hard disk, etc. ; And a communication section 909 including a network interface card such as a LAN card, a modem, etc. The communication section 909 performs communication processing via a network such as the Internet.
- the driver 910 is also connected to the I/O interface 905 as needed.
- a removable medium 911 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like, is installed on the drive 910 as necessary, so that the computer program read out therefrom is installed into the storage portion 908 as needed.
- the process described above with reference to FIGS. 1 to 3 may be implemented as a computer software program.
- embodiments of the present disclosure include a computer program product that includes a computer program tangibly contained on a machine-readable medium, the computer program containing program code for performing the methods of FIGS. 1-3.
- the computer program may be downloaded and installed from the network through the communication section 909, and/or installed from the removable medium 911.
- each block in the flowchart or block diagram may represent a module, program segment, or part of code that contains one or more logics for implementing prescribed logic Function executable instructions.
- the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession can actually be executed in parallel, and they can sometimes be executed in the reverse order, depending on the functions involved.
- each block in the block diagrams and/or flowcharts, and combinations of blocks in the block diagrams and/or flowcharts can be implemented with dedicated hardware-based systems that perform specified functions or operations Or, it can be realized by a combination of dedicated hardware and computer instructions.
- the units or modules described in the embodiments of the present disclosure may be implemented in software or hardware.
- the described unit or module may also be provided in the processor.
- the names of these units or modules do not constitute a limitation on the units or modules themselves.
- the present disclosure also provides a computer-readable storage medium.
- the computer-readable storage medium may be a computer-readable storage medium included in the device described in the foregoing embodiments; A computer-readable storage medium assembled into the device.
- the computer-readable storage medium stores one or more programs that are used by one or more processors to perform the pixel compensation method described in the present disclosure.
- At least one embodiment of the present disclosure also provides a display device, including the pixel compensation device described above.
- the light-sensing device in the compensation device can be attached to the outer surface of the display panel in an externally attached manner; or, the light-sensing device can be installed in the display panel to position the light-emitting unit of each light-sensing device and each sub-pixel correspond.
- An example of the display device is shown in FIG. 4.
- the display device may be an electronic device such as a mobile phone, a tablet computer, a notebook computer, a television, an electronic advertising machine, and the like.
- the display device can solve the problems of afterimages and various traces caused by uneven brightness of multiple sub-pixels at one time, simplify the compensation of sub-pixels, improve the accuracy of pixel compensation, and improve the display effect and display uniformity of the display device .
- beneficial effects reference may be made to the beneficial effects of the pixel compensation device according to the embodiments of the present disclosure, which will not be detailed here.
Abstract
Description
Claims (24)
- 一种像素补偿方法,包括:根据子像素在当前检测周期内的灰阶数据以及补偿值生成源极电压信号,以控制所述子像素的发光亮度;根据所述子像素的所述发光亮度生成感测值;以及根据所述子像素在所述当前检测周期内的所述灰阶数据和所述补偿值以及所述感测值,确定所述子像素在下一检测周期内的补偿值。
- 根据权利要求1所述的像素补偿方法,还包括:在所述下一检测周期内,根据所述子像素的预设灰阶数据以及所述在下一检测周期内的补偿值生成源极电压信号,并输出至源极驱动器。
- 根据权利要求1或2所述的像素补偿方法,其中,所述根据所述子像素在所述当前检测周期内的所述灰阶数据和所述补偿值以及所述感测值,确定所述子像素在下一检测周期内的补偿值,包括:根据所述子像素在所述当前检测周期内的多个灰阶数据、与所述多个灰阶数据对应的多个感测值以及补偿偏移值,确定所述子像素的亮度曲线;根据所述子像素的所述亮度曲线以及所述子像素的理想亮度曲线,确定所述子像素在所述下一检测周期内的补偿偏移值变化量和补偿增益值;以及根据所述子像素在所述下一检测周期内的所述补偿偏移值变化量和所述补偿增益值以及在所述当前检测周期内的补偿值,确定所述子像素在所述下一检测周期内的补偿值。
- 根据权利要求3所述的像素补偿方法,其中,所述根据所述子像素在所述当前检测周期内的多个灰阶数据、与所述多个灰阶数据对应的多个感测值以及所述补偿偏移值,确定所述子像素的所述亮度曲线,包括:根据所述子像素在所述当前检测周期内的第一灰阶数据和第二灰阶数据、分别与所述第一灰阶数据和所述第二灰阶数据对应的第一亮度感测值和第二亮度感测值以及所述补偿偏移值,将所述子像素的亮度曲线确定如下:S1=K2*(V1+Vth-Vth 1) 2=K2*(V1-DVth) 2≈K2*(V1 2-2*V1*DVth)S2=K2*(V2+Vth-Vth 1) 2=K2*(V2-DVth) 2≈K2*(V2 2-2*V1*DVth),其中,V1表示所述第一灰阶数据,V2表示所述第二灰阶数据,S1表示所述第一亮度感测值,S2表示所述第二亮度感测值,K2表示补偿增益值,Vth表示所述补偿偏移值,ΔVth表示补偿偏移值变化量,ΔVth=Vth 1-Vth,以及Vth 1表示子像素启亮电压值。
- 根据权利要求5所述的像素补偿方法,其中,所述在所述下一检测周期内,根据所述子像素的所述预设灰阶数据以及所述在下一检测周期内的补偿值生成所述源极电压信号,包括:根据所述子像素的所述预设灰阶数据以及所述在下一检测周期内的补偿值,通过下式计算所述源极电压信号:Data2=LUT(K2)×Data1+Vth+ΔVth其中,Data1表示所述预设灰阶数据;Data2表示所述源极电压信号;以及LUT表示映射函数。
- 根据权利要求1至6中任一项所述的像素补偿方法,还包括:根据所述子像素在下一显示周期内的灰阶数据以及所述在下一检测周期内的补偿值生成源极电压信号,以控制所述子像素在所述下一显示周期内的发光亮度。
- 一种像素补偿装置,包括:算法补偿电路,配置为根据子像素在当前检测周期内的灰阶数据以及补偿值生成源极电压信号,以控制所述子像素的发光亮度;以及系数计算电路,配置为根据所述子像素在所述当前检测周期内的所述灰阶数据和所述补偿值以及根据所述子像素在所述源极电压信号的驱动下提供的发光亮度而生成的感测值,确定所述子像素在下一检测周期内的补偿值。
- 根据权利要求8所述的像素补偿装置,还包括:光感器件,其中,所述光感器件配置为根据所述子像素的所述发光亮度生成所述感测值。
- 根据权利要求8或9所述的像素补偿装置,其中,所述算法补偿电路还配置为在所述下一检测周期内,根据所述子像素的预设灰阶数据以及所述在下一检测周期内的补偿值生成源极电压信号,并输出至源极驱动器。
- 根据权利要求8至10中任一项所述的像素补偿装置,还包括:亮度转换电路,配置为接收所述子像素的灰阶数据,并将所述灰阶数据转换为亮度电压信号,以输出至所述算法补偿电路。
- 根据权利要求8至11中任一项所述的像素补偿装置,还包括:时序控制电路,配置为接收时序信号,并根据所述时序信号产生控制源极驱动器的源极电压信号和栅极驱动器的栅极电压信号。
- 根据权利要求8至12中任一项所述的像素补偿装置,还包括:存储控制电路,其中,所述存储控制电路配置为与所述系数计算电路信号连接,并控制所述系数计算电路以将所述子像素在下一检测周期内的补偿值存储在存储器中。
- 根据权利要求8至13中任一项所述的像素补偿装置,其中,所述算法补偿电路还配置为根据所述子像素在下一显示周期内的灰阶数据以及所述在下一检测周期内的补偿值生成源极电压信号,以控制所述子像素在所述下 一显示周期内的发光亮度。
- 一种像素补偿装置,包括:处理器;以及存储器,所述存储器配置为存储指令,当所述指令被所述处理器执行时,致使所述处理器执行以下操作:根据子像素在当前检测周期内的灰阶数据以及补偿值生成源极电压信号,以控制所述子像素的发光亮度;以及根据所述子像素在所述当前检测周期内的所述灰阶数据和所述补偿值以及所述光感器件生成的所述感测值,确定所述子像素在下一检测周期内的补偿值。
- 根据权利要求15所述的像素补偿装置,还包括光感器件,其中,所述光感器件配置为接收所述子像素发出的光,并根据所述子像素的所述发光亮度生成所述感测值。
- 根据权利要求15或16所述的像素补偿装置,其中,所述操作还包括:在所述下一检测周期内,根据所述子像素的预设灰阶数据以及所述在下一检测周期内的补偿值生成源极电压信号,并输出至源极驱动器。
- 根据权利要求15至17中任一项所述的像素补偿装置,其中,所述根据所述子像素在所述当前检测周期内的所述灰阶数据和所述补偿值以及所述感测值,确定所述子像素在下一检测周期内的补偿值,包括:根据所述子像素在所述当前检测周期内的多个灰阶数据、与所述多个灰阶数据对应的多个感测值以及补偿偏移值,确定所述子像素的亮度曲线;根据所述子像素的所述亮度曲线以及所述子像素的理想亮度曲线,确定所述子像素在所述下一检测周期内的补偿偏移值变化量和补偿增益值;以及根据所述子像素在所述下一检测周期内的所述补偿偏移值变化量和所述补偿增益值以及在所述当前检测周期内的补偿值,确定所述子像素在所述下一检测周期内的补偿值。
- 根据权利要求18所述的像素补偿装置,其中,所述根据所述子像素在所述当前检测周期内的多个灰阶数据、与所述多个灰阶数据对应的多个感测值以及所述补偿偏移值,确定所述子像素的所述亮度曲线,包括:根据所述子像素在所述当前检测周期内的第一灰阶数据和第二灰阶数据、分别与所述第一灰阶数据和所述第二灰阶数据对应的第一亮度感测值和第二亮度感测值以及所述补偿偏移值,将所述子像素的亮度曲线确定如下:S1=K2*(V1+Vth-Vth 1) 2=K2*(V1-DVth) 2≈K2*(V1 2-2*V1*DVth)S2=K2*(V2+Vth-Vth 1) 2=K2*(V2-DVth) 2≈K2*(V2 2-2*V1*DVth),其中,V1表示所述第一灰阶数据,V2表示所述第二灰阶数据,S1表示所述第一亮度感测值,S2表示所述第二亮度感测值,K2表示补偿增益值,Vth表示所述补偿偏移值,ΔVth表示补偿偏移值变化量,ΔVth=Vth 1-Vth,以及Vth 1表示子像素启亮电压值。
- 根据权利要求20所述的像素补偿装置,其中,所述在所述下一检测周期内,根据所述子像素的所述预设灰阶数据以及所述在下一检测周期内的 补偿值生成所述源极电压信号,包括:根据所述子像素的所述预设灰阶数据以及所述在下一检测周期内的补偿值,通过下式计算所述源极电压信号:Data2=LUT(K2)×Data1+Vth+ΔVth其中,Data1表示所述预设灰阶数据;Data2表示所述源极电压信号;以及LUT表示映射函数。
- 根据权利要求15至21中任一项所述的像素补偿装置,其中,所述存储器还配置为存储所述补偿值。
- 根据权利要求15至22中任一项所述的像素补偿装置,其中,所述操作还包括:根据所述子像素在下一显示周期内的灰阶数据以及所述在下一检测周期内的补偿值生成源极电压信号,以控制所述子像素在所述下一显示周期内的发光亮度。
- 一种显示装置,包括权利要求8-23任一项所述的像素补偿装置。
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CN112397038B (zh) * | 2019-08-13 | 2022-05-03 | 群创光电股份有限公司 | 补偿显示装置的异常像素的亮度的方法 |
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US20210225272A1 (en) | 2021-07-22 |
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