CN111833795A - Display device and mura compensation method of display device - Google Patents
Display device and mura compensation method of display device Download PDFInfo
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Abstract
The invention discloses a display device and a mura compensation method of the display device. The display device comprises a display panel, a display driver and an external memory; the display panel comprises a first display area and a second display area; the display driver is connected with the external memory, the external memory stores first compensation data and second compensation data, the first compensation data are compression compensation data, and the second compensation data are non-compression compensation data; the display driver is used for carrying out mura compensation on a first display area of the display panel according to the first compensation data and carrying out mura compensation on a second display area of the display panel according to the second compensation data. The embodiment of the invention can accurately compensate the second display area and improve the display effect.
Description
Technical Field
The present invention relates to display technologies, and in particular, to a display device and a mura compensation method for the display device.
Background
With the development of display technology, the application of display devices is becoming more and more extensive, and accordingly, the requirements for the display effect of display devices are becoming higher and higher.
When a display device performs display, mura (bright marks, dark marks, or uneven brightness) compensation is required to improve the display effect, however, the conventional display device, especially a display device having different display areas, has poor compensation effect during mura compensation, resulting in poor display effect.
Disclosure of Invention
The invention provides a display device and a mura compensation method of the display device, which are used for improving the mura compensation effect of the display device and further improving the display effect.
In a first aspect, an embodiment of the present invention provides a display device, where the display device includes a display panel, a display driver, and an external memory; the display panel comprises a first display area and a second display area; the display driver is connected with the external memory, the external memory stores first compensation data and second compensation data, the first compensation data are compression compensation data, and the second compensation data are non-compression compensation data; the display driver is used for carrying out mura compensation on a first display area of the display panel according to the first compensation data and carrying out mura compensation on a second display area of the display panel according to the second compensation data.
Optionally, the display driver includes a first internal storage unit, a second internal storage unit, a decompression unit, and a control processing unit; the first internal storage unit is used for receiving and storing first compensation data of the external memory, and the second internal storage unit is used for receiving and storing second compensation data of the external memory; the decompression unit is used for decompressing the first compensation data to obtain third compensation data; the control processing unit is used for generating a first display driving signal according to input image data and the third compensation data and generating a second display driving signal according to the input image data and the second compensation data; the display panel is used for displaying images in the first display area according to the first display driving signal and displaying images in the second display area according to the second display driving signal.
Optionally, the number of the sub-pixels located in the first display area is greater than the number of the sub-pixels located in the second display area.
Optionally, the first compensation data includes X compensation data, and the number of sub-pixels located in the first display area is more than X; the second compensation data comprises Y compensation data, and the number of the sub-pixels in the second display area is more than Y.
Optionally, the first compensation data includes M compensation data, and the number of sub-pixels located in the first display area is more than M; the second compensation data comprises N compensation data, and the number of the sub-pixels in the second display area is equal to N.
Optionally, the second display area corresponds to a photosensitive assembly layout area.
Optionally, the compression mode of the first compensation data includes a JPEG format compression mode, and the decompression unit is configured to decompress the first compensation data by a corresponding decompression algorithm.
In a second aspect, an embodiment of the present invention provides a mura compensation method for a display device, where the display device includes a display panel, a display driver, and an external memory; the display panel comprises a first display area and a second display area; the display driver is connected with the external memory, the external memory stores first compensation data and second compensation data, the first compensation data are compression compensation data, and the second compensation data are non-compression compensation data; the compensation method comprises the following steps: in a display phase, the display driver generates a first display driving signal according to input image data and the first compensation data, and generates a second display driving signal according to the image data and the second compensation data; the display panel displays images in the first display area according to the first display driving signal and displays images in the second display area according to the second display driving signal.
Optionally, the compensation method further comprises: obtaining compensation data corresponding to the first display area and compensation data corresponding to the second display area; compressing the compensation data corresponding to the first display area and storing the compressed compensation data to the external memory to obtain the first compensation data; and storing the compensation data corresponding to the second display area to the external memory to obtain the second compensation data.
Optionally, the display driver includes a first internal storage unit, a second internal storage unit, a decompression unit, and a control processing unit; compressing the compensation data corresponding to the first display area and storing the compressed compensation data to the external memory to obtain the first compensation data, wherein the method comprises the following steps: compressing the compensation data corresponding to the first display area, writing the compressed compensation data into the first internal storage unit, and further storing the compressed compensation data into the external memory; storing the compensation data corresponding to the second display area to the external memory to obtain the second compensation data, including: and writing the compensation data corresponding to the second display area into the second internal storage unit, and further storing the compensation data into the external memory.
In the technical scheme of the embodiment, the adopted display device comprises a display panel, a display driver and an external memory; the display panel comprises a first display area and a second display area; the display driver is connected with the external memory, the external memory stores first compensation data and second compensation data, the first compensation data are compression compensation data, and the second compensation data are non-compression compensation data; the display driver is used for carrying out mura compensation on a first display area of the display panel according to the first compensation data and carrying out mura compensation on a second display area of the display panel according to the second compensation data. When the display panel displays, the display driver acquires first compensation data and second compensation data from the external memory, the first compensation data and the second compensation data are respectively provided for the first display area and the second display area to compensate, a part of data possibly inconsistent with original data when the compressed compensation data are compressed and/or decompressed, and therefore final mura compensation effect is not high.
Drawings
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another display device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a display driver according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a first compensation data and a second compensation data storage mode according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram illustrating a binding between a display panel and a driver chip according to an embodiment of the present invention;
fig. 6 is a flowchart of a mura compensation method of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As mentioned in the background art, the mura compensation effect of the conventional display device is not good, and the applicant has found through careful research that the technical problem is caused because the conventional full-screen display device generally includes a main display area and an auxiliary display area, and the auxiliary display area, that is, an area corresponding to an integrated photosensitive component (for example, a camera), needs to ensure a higher transmittance.
Based on the technical problem, the invention provides the following solution:
fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention, and referring to fig. 1, a display device 10 includes a display panel 100, a display driver 200, and an external memory 300; the display panel 100 includes a first display region 1001 and a second display region 1002; the display driver 200 is connected to the external memory 300, and the external memory 300 stores first compensation data and second compensation data, the first compensation data being compression compensation data, the second compensation data being non-compression compensation data; the display driver 200 is configured to perform mura compensation on a first display area 1001 of the display panel 100 according to the first compensation data and perform mura compensation on a second display area 1002 of the display panel 100 according to the second compensation data.
Specifically, the display device 10 may be, for example, an organic light emitting diode display device (OLED), a liquid crystal display device (LCD), an electrochromic display (ECD), a Plasma Display Panel (PDP), an electroluminescent display (ELD), or the like. The following description will be given taking an example in which the display device is an organic light emitting diode display device.
The display device 10 may include: the display device comprises a plurality of scanning signal lines (GL 1-GLk) extending in the row direction, a plurality of data signal lines (DL 1-DLj) extending in the column direction and intersecting with the scanning signal lines, wherein the scanning signal lines and the data signal lines intersect to form a plurality of sub-pixels PX in a plurality of pixel areas, when the scanning signal lines are sequentially selected, namely scanning pulses are output to the scanning lines, the sub-pixels PX in the rows connected with the scanning lines are selected and turned on, the sub-pixels PX turned on at the moment can receive gray scale voltages transmitted by the data signal lines, and the sub-pixels PX can display corresponding gray scales according to the received gray scale voltages.
The sub-pixel PX may include: the pixel circuit formed by the switching transistor Tsw, the storage capacitor C, the driving transistor Tdrv, and the organic light emitting diode, which is also referred to as a 2T1C circuit, is electrically connected in the configuration shown in fig. 1, and includes two transistors and one storage capacitor. When the corresponding scanning signal line is selected, the switching transistor Tsw is turned on, the gray scale voltage on the data signal line is transmitted to the storage capacitor C, and the storage capacitor C stores the gray scale voltage, so that the driving transistor Tdrv can generate a stable driving current according to the gray scale voltage, and further drive the organic light emitting diode to emit light. It should be noted that in some other embodiments, the sub-pixel PX may also be a driving circuit with a threshold compensation function, for example, a 7T1C pixel circuit is adopted, so that the generated driving current is independent of the threshold voltage of the driving transistor.
The plurality of scan signal lines may be electrically connected to the gate driver 400, and the gate driver 400 may be, for example, a plurality of cascaded shift registers, thereby supplying scan signals to the plurality of scan signal lines row by row to select the scan lines row by row.
The first display region 1001 may be, for example, a main display region, the second display region 1002 may be, for example, a sub display region, and the sub display region may be a photosensitive component layout region (for example, an image pickup region) or a bending region, and when the second display region 1002 corresponds to the photosensitive component layout region, the scanning signal lines and the data signal lines are not overlapped with the second display region 1002, for example, they may surround the second display region 1002, so as to improve the light transmittance of the second display region 1002.
In the present embodiment, the display driver 200 can directly provide gray scale voltage data to the corresponding data signal lines, i.e. the display driver 200 can be directly electrically connected to the data signal lines as shown in fig. 1; in other embodiments, as shown in fig. 2, fig. 2 is a schematic structural diagram of another display device according to an embodiment of the present invention, the display device may further include a source driver 500, the display driver 200 transmits the compensated image data RGB to the source driver 500, and the source driver 500 converts the received compensated image data RGB into gray-scale voltages to drive corresponding pixels PX to emit light for display.
The external memory 300 may be, for example, a memory on the main board of the display device 10, which may be a RAM memory, a ROM memory, a FLASH memory, or the like, preferably a FLASH memory. The external memory 300 stores therein first compensation data and second compensation data for compensating mura defects of image signals input from the first display area 1001 and the second display area 1002, respectively. When the display panel 100 performs display, the display driver 200 obtains the first compensation data and the second compensation data from the external memory 300 to respectively compensate the first display area 1001 and the second display area 1002 according to the first compensation data and the second compensation data, for example, generate a first display driving signal according to the first compensation data, and the first display area 1001 emits light according to the first display driving signal for display; the display driver 200 generates a second display driving signal according to the second compensation data, and the second display region 1002 emits light to display according to the second display driving signal. Generally, the area of the first display area is larger, the number of corresponding sub-pixels is larger, and the data size of the corresponding first compensation data is larger, that is, the first compensation data is compressed compensation data, and a part of data of the compressed compensation data may be inconsistent with the original data during compression and/or decompression, so that the final mura compensation effect is not high. Usually, the area of the second display area is small, the number of corresponding sub-pixels is small, the data size of corresponding second compensation data is small, the second compensation data are non-compression compensation data, namely the second compensation data can perform accurate compensation on the second display area, so that the display effect of the second display area is greatly improved, and the display effect of the display panel is further improved.
In the technical scheme of the embodiment, the adopted display device comprises a display panel, a display driver and an external memory; the display panel comprises a first display area and a second display area; the display driver is connected with the external memory, the external memory stores first compensation data and second compensation data, the first compensation data are compression compensation data, and the second compensation data are non-compression compensation data; the display driver is used for carrying out mura compensation on a first display area of the display panel according to the first compensation data and carrying out mura compensation on a second display area of the display panel according to the second compensation data. When the display panel displays, the display driver acquires first compensation data and second compensation data from the external memory, the first compensation data and the second compensation data are respectively provided for the first display area and the second display area to compensate, a part of data possibly inconsistent with original data when the compressed compensation data are compressed and/or decompressed, and therefore final mura compensation effect is not high.
Alternatively, fig. 3 is a schematic structural diagram of a display driver according to an embodiment of the present invention, and referring to fig. 3, the display driver 200 includes a first internal storage unit 2001, a second internal storage unit 2002, a decompression unit 2003, and a control processing unit 2004; a first internal storage unit 2001 for receiving and storing first compensation data of the external memory 300, and a second internal storage unit 2002 for receiving and storing second compensation data of the external memory 300; the decompression unit 2003 is configured to decompress the first compensation data to obtain third compensation data; the control processing unit 2004 is configured to generate a first display driving signal from the input image data and the third compensation data, and generate a second display driving signal from the input image data and the second compensation data; the display panel 100 is used for displaying an image in the first display area 1001 according to the first display driving signal and displaying an image in the second display area 1002 according to the second display driving signal.
Specifically, the first internal memory unit 2001 and the second internal memory unit 2002 may be RAM memories, and both of them may be connected to the external memory 300 through a QSPI interface. A first internal storage unit 2001 and a second internal storage unit 2002, which can respectively obtain the first compensation data and the second compensation data under the action of a storage controller, for example, the storage controller can control the first internal storage unit 2001 to respectively obtain the first compensation data from the external memory and the second internal storage unit 2002 to obtain the second compensation data from the external memory in a chip selection manner; the storage capacity of the first internal memory unit 2001 may be larger than that of the second internal memory unit 2002. The data lines and the clock lines of the first internal memory unit 2001 and the second internal memory unit 2002 can be multiplexed to reduce the area of the display device. The decompression unit 2003 may receive the first compensation data from the first internal storage unit 2001 and decompress to generate third compensation data, which may include data for compensating for mura defects of the first display area 1001 of the display panel 100, which may include having non-uniform contrast, luminance, or brightness values between image signals of adjacent pixels. Therefore, when the mura defect is generated in the first display area 1001 of the display panel, a significant difference in contrast, illumination or brightness value is generated between adjacent pixels, and such mura defect may include line mura, black dot mura, white dot mura, black area mura, white area mura, ring mura, and the like. The third compensation data usually only includes compensation data at certain specific gray scale points, such as compensation data corresponding to the 128 gray scale and the 255 gray scale, after the control processing unit 2004 receives the image data to be displayed and the third compensation data, a first display driving signal can be generated according to an internally stored mura compensation algorithm, the first display driving signal includes compensation data corresponding to any gray scale, the first display driving signal can be gray scale data RGB, and at this time, the first display driving signal can be transmitted to the data signal line through the source driver; the first display driving signal may also be a gray scale voltage Vdata, which is directly provided to the data signal line. The first display area displays according to the first display driving signal, the mura phenomenon is not obvious, and the display quality is high. The second compensation data acquired by the second internal storage unit 2002 is uncompressed compensation data, and can be directly transmitted to the control processing unit 2004 without decompression, the second compensation data may only include compensation data at certain specific gray scale points, such as compensation data corresponding to only 128 gray scales and 255 gray scales, so as to further reduce the data amount, and the second compensation data may also include compensation data at all gray scale points, so as to further improve the compensation accuracy. After receiving the image data to be displayed and the second compensation data, the control processing unit 2004 may generate a second display driving signal according to an internally stored mura compensation algorithm, where the second display driving signal includes compensation data corresponding to any gray scale, and the second display driving signal may be gray scale data RGB, and may be transmitted to a data signal line through a source driver at this time; the first and second display driving signals may also be gray scale voltages Vdata, which may be directly provided to the data signal lines. It should be noted that the mura compensation algorithm is well known in the art and will not be described in detail herein.
The first compensation data and the second compensation data may be stored in the external memory in a stack manner, for example, the first compensation data is stored at the top of the stack, the second compensation data is stored at the bottom of the stack, as shown in fig. 4, fig. 4 is a schematic diagram of a storage mode of the first compensation data and the second compensation data according to an embodiment of the present invention, for example, the first compensation data and the second compensation data have n (a) total numbers1～an) Wherein the second compensation data includes a1And a2Two data, and the first compensation data includes a3～anA can be substituted by1～anAre stacked in sequence such that a1At the bottom of the stack, anIs positioned at the top of the stack.
The display driver 200 may be a driver chip of a display device, as shown in fig. 5, fig. 5 is a schematic diagram illustrating a structure of a display panel and a driver chip according to an embodiment of the present invention, which may correspond to the display device shown in fig. 1, and at this time, the display driver 200 may be bound to the display panel through a COF 700, it should be noted that in some other embodiments, the display driver 200 may be bound to the display panel through a COG or a TAB.
Alternatively, the number of sub-pixels located in the first display region 1001 is greater than the number of sub-pixels located in the second display region 1002.
Specifically, the sub-pixels may be a red sub-pixel, a green sub-pixel, a blue sub-pixel, and the like, the circuit of each sub-pixel is the same, and the material of the light emitting layer thereof may be different, so that different color display is realized, and the display device is capable of full color display. In this embodiment, the number of the sub-pixels located in the first display area 1001 is greater than the number of the sub-pixels located in the second display area 1002, and the data amount of the original compensation data corresponding to the corresponding first display area 1001 is larger, so that the original compensation data is compressed into the first compensation data, thereby saving the storage space and reducing the cost. The data amount of the original compensation data corresponding to the second display area 1002 is small, and the original compensation data can be directly used as the second compensation data, so that the second display area 1002 can be accurately compensated.
Optionally, the first compensation data includes X compensation data, and the number of sub-pixels located in the first display area 1001 is greater than X; the second compensation data includes Y compensation data, and the number of sub-pixels located in the second display region 1002 is greater than Y.
Specifically, X and Y are natural numbers, when calculating the original compensation data required by the first display area 1001, for example, the luminance at each sub-pixel of the first display area 1001 is obtained by an optical device to calculate the original compensation data required by each sub-pixel, and in the calculation process, a [2 × 2], [2 × 3], [2 × 4] or [4 × 4] Block compensation scheme may be adopted, where the [2 × 2] Block compensation scheme indicates that four sub-pixels corresponding to two adjacent rows and two columns of intersections adopt the same compensation coefficient, that is, the four sub-pixels correspond to one original compensation data, and the remaining compensation schemes are similar to each other and are not described herein again; the four sub-pixels are of the same type, such as red sub-pixels, green sub-pixels or blue sub-pixels; the data amount of the original compensation data is smaller than the number of the sub-pixels of the first display area 1001, so that the data amount of the original compensation data can be reduced, and the data amount of the corresponding first compensation data is also smaller, thereby further saving the storage space and reducing the cost. When calculating the original compensation data required by the second display area 1002, for example, the luminance at each sub-pixel of the second display area 1002 is obtained through an optical device to calculate the original compensation data required by each sub-pixel, and in the calculation, a [2 × 2], [2 × 3], [2 × 4] or [4 × 4] Block compensation scheme can be adopted; the data amount of the original compensation data is smaller than the number of the sub-pixels of the second display area 1002, so that the data amount of the original compensation data can be reduced, and the data amount of the corresponding second compensation data is also smaller, thereby further saving the storage space and reducing the cost.
Optionally, the first compensation data includes M compensation data, and the number of sub-pixels located in the first display area is more than M; the second compensation data comprises N compensation data, and the number of the sub-pixels in the second display area is equal to N.
Specifically, M and N are both natural numbers, when calculating the original compensation data required by the first display area 1001, a [2 × 2], [2 × 3], [2 × 4] or [4 × 4] Block compensation scheme may be adopted, the data amount of the original compensation data is smaller than the number of sub-pixels of the first display area 1001, the data amount of the original compensation data can be reduced, and the data amount of the corresponding first compensation data is also smaller, thereby further saving the storage space and reducing the cost. When the original compensation data required by the second display area 1002 is calculated, for example, the luminance at each sub-pixel of the second display area 1002 is obtained through an optical device to calculate the original compensation data required by each sub-pixel, in the calculation process, a [1 × 1] Block compensation scheme can be adopted, the corresponding compensation coefficients of each sub-pixel can be different, the original compensation data correspond to the sub-pixels one by one, the data amount of the original compensation data is equal to the number of the sub-pixels of the second display area 1002, the sub-pixels corresponding to the second display area 1002 can be subjected to more accurate mura compensation, the compensation quality is higher, and the display effect is further improved.
Exemplarily, the second display area 1002 corresponds to a photosensitive component layout area (e.g., a camera area), and metal wiring may not be arranged in the photosensitive component layout area as much as possible, that is, a scanning signal line and a data signal line may not be overlapped with the camera area; the metal wiring is light-tight and can influence the sensing of the photosensitive assembly to light, for example, the photosensitive assembly is a camera, and the metal wiring is light-tight and can influence the quality of images collected by the camera.
Optionally, the compression mode of the first compensation data includes a JPEG format compression mode, and the decompression unit 2004 is configured to decompress the first compensation data by a corresponding decompression algorithm.
Specifically, the JPEG format compression algorithm may use a joint coding method such as predictive coding (DPCM), Discrete Cosine Transform (DCT), or entropy coding, for example, to remove redundant image and color data, which belongs to lossy compression, and can compress image data in a small storage space, which may cause damage to image data to some extent. Especially, using too high a compression ratio will degrade the quality of the image restored after the final decompression. The decompression unit 2004 decompresses the first compensation data using a decompression algorithm corresponding to the compression method of the first compensation data, and when the first compensation data uses another compression method, the decompression unit 2004 decompresses the first compensation data using a corresponding decompression algorithm. For example, when the compression mode of the first compensation data is JPEG format compression, the decompression process may include: allocating space for JPEG objects and initializing; specifying a decompressed data source; acquiring file information; setting parameters including image size and color space for decompression; starting decompression; taking out data; decompression is finished; and releasing the resources. The decompression unit 2004 adopts a corresponding decompression algorithm, so that the decompression efficiency is high, the algorithm stability is high, and the third compensation data generated after decompression has less loss or no loss compared with the original compensation data, thereby improving the compensation precision and further improving the display effect.
Fig. 6 is a flowchart illustrating a mura compensation method of a display device according to an embodiment of the present invention, and referring to fig. 6, the display device includes a display panel, a display driver, and an external memory; the display panel comprises a first display area and a second display area; the display driver is connected with the external memory, the external memory stores first compensation data and second compensation data, the first compensation data are compression compensation data, and the second compensation data are non-compression compensation data; the compensation method comprises the following steps:
step S601, in the display stage, the display driver generates a first display driving signal according to the input image data and the first compensation data, and generates a second display driving signal according to the image data and the second compensation data;
specifically, the display driver obtains first compensation data and second compensation data from the external memory, and generates a first display driving signal and a second display driving signal according to the image data, and compensates the first display area and the second display area respectively, where the first display driving signal may be gray scale data or gray scale voltage data, and the second display driving signal may be gray scale data or gray scale voltage data, and a part of data of the compressed compensation data may be inconsistent with the original data when compressed and/or decompressed, thereby causing a low final mura compensation effect.
In step S602, the display panel displays an image in the first display area according to the first display driving signal, and displays an image in the second display area according to the second display driving signal.
First display drive signal and second display drive signal can carry out the mura compensation to first display area and second display area respectively to make the mura of first display area and second display area not obvious, promote display effect.
In the technical solution of this embodiment, the adopted compensation method includes: in a display stage, a display driver generates a first display driving signal according to input image data and first compensation data, and generates a second display driving signal according to the image data and second compensation data; the display panel displays an image in the first display area according to the first display driving signal and displays an image in the second display area according to the second display driving signal. The display driver obtains the first compensation data and the second compensation data from the external memory, and respectively compensates the first display area and the second display area, and the compressed compensation data may have a part of data inconsistent with the original data when being compressed and/or decompressed, thereby resulting in a low final mura compensation effect.
Optionally, the compensation method further includes: obtaining compensation data corresponding to the first display area and compensation data corresponding to the second display area; compressing the compensation data corresponding to the first display area and storing the compressed compensation data to an external memory to obtain first compensation data; and storing the compensation data corresponding to the second display area into an external memory to obtain second compensation data.
Specifically, after the display panel is manufactured, display may be performed, for example, 128 gray scales are displayed, and in a 128 gray scale image, the luminance of the sub-pixels corresponding to the display area (including the first display area and the second display area) of the display panel is collected by an optical device, so as to determine the compensation data corresponding to the first display area and the second display area, that is, the original compensation data, where the calculation scheme includes, but is not limited to, a [1 × 1], [2 × 2], [2 × 3], [2 × 4] or a [4 × 4] Block compensation scheme; the compensation data corresponding to the first display area has larger data volume, and can be stored in an external memory after being compressed, so that the storage space is saved; and the compensation data corresponding to the second display area is directly stored in an external memory without being compressed so as to more accurately compensate the second display area.
Optionally, the display driving unit includes a first internal storage unit, a second internal storage unit, a decompression unit, and a control processing unit; compressing compensation data corresponding to a first display area and storing the compressed compensation data to an external memory to obtain the first compensation data, wherein the method comprises the following steps: compressing the compensation data corresponding to the first display area, writing the compressed compensation data into a first internal storage unit, and further storing the compensation data into an external memory;
storing the compensation data corresponding to the second display area to the external memory to obtain the second compensation data, including:
and writing the compensation data corresponding to the second display area into the second internal storage unit and further storing the compensation data into an external memory.
Specifically, the first internal storage unit and the second internal storage unit can be both RAMs, which has the advantages of high access speed and the like, but data can be lost after power failure, and the first compensation data can be stored in the first internal storage unit and then stored in the external memory, so as to prevent the first compensation data from being lost; the second compensation data can be stored in the second internal storage unit and then stored in the external memory, so as to prevent the second compensation data from being lost. The first compensation data and the second compensation data can be stored in the external memory in a stack manner, for example, the second compensation data is stored first so that the second compensation data is located at the bottom of the stack, and then the first compensation data is stored so that the first compensation data is located at the top of the stack.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A display device, characterized in that the display device comprises a display panel and a display driver, an external memory; the display panel comprises a first display area and a second display area;
the display driver is connected with the external memory, the external memory stores first compensation data and second compensation data, the first compensation data are compression compensation data, and the second compensation data are non-compression compensation data;
the display driver is used for carrying out mura compensation on a first display area of the display panel according to the first compensation data and carrying out mura compensation on a second display area of the display panel according to the second compensation data.
2. The display device according to claim 1, wherein the display driver includes a first internal storage unit, a second internal storage unit, a decompression unit, and a control processing unit;
the first internal storage unit is used for receiving and storing first compensation data of the external memory, and the second internal storage unit is used for receiving and storing second compensation data of the external memory;
the decompression unit is used for decompressing the first compensation data to obtain third compensation data;
the control processing unit is used for generating a first display driving signal according to input image data and the third compensation data and generating a second display driving signal according to the input image data and the second compensation data;
the display panel is used for displaying images in the first display area according to the first display driving signal and displaying images in the second display area according to the second display driving signal.
3. The display device according to claim 1, wherein the number of sub-pixels located in the first display region is greater than the number of sub-pixels located in the second display region.
4. The display device according to claim 3, wherein the first compensation data comprises X compensation data, and the number of sub-pixels located in the first display region is more than X;
the second compensation data comprises Y compensation data, and the number of the sub-pixels in the second display area is more than Y.
5. The display device according to claim 3, wherein the first compensation data comprises M compensation data, and the number of the sub-pixels in the first display area is more than M;
the second compensation data comprises N compensation data, and the number of the sub-pixels in the second display area is equal to N.
6. The display device according to claim 3, wherein the second display region corresponds to a photosensitive member arrangement region.
7. The display device according to claim 2, wherein the compression mode of the first compensation data comprises a JPEG format compression mode, and the decompression unit is configured to decompress the first compensation data by a corresponding decompression algorithm.
8. A mura compensation method of a display device, wherein the said display device includes display panel and display driver, external memory; the display panel comprises a first display area and a second display area; the display driver is connected with the external memory, the external memory stores first compensation data and second compensation data, the first compensation data are compression compensation data, and the second compensation data are non-compression compensation data;
the compensation method comprises the following steps:
in a display phase, the display driver generates a first display driving signal according to input image data and the first compensation data, and generates a second display driving signal according to the image data and the second compensation data;
the display panel displays images in the first display area according to the first display driving signal and displays images in the second display area according to the second display driving signal.
9. The mura compensation method according to claim 8, further comprising:
obtaining compensation data corresponding to the first display area and compensation data corresponding to the second display area;
compressing the compensation data corresponding to the first display area and storing the compressed compensation data to the external memory to obtain the first compensation data;
and storing the compensation data corresponding to the second display area to the external memory to obtain the second compensation data.
10. The mura compensation method according to claim 9, wherein the display driver includes a first internal storage unit, a second internal storage unit, a decompression unit, and a control processing unit;
compressing the compensation data corresponding to the first display area and storing the compressed compensation data to the external memory to obtain the first compensation data, wherein the method comprises the following steps:
compressing the compensation data corresponding to the first display area, writing the compressed compensation data into the first internal storage unit, and further storing the compressed compensation data into the external memory;
storing the compensation data corresponding to the second display area to the external memory to obtain the second compensation data, including:
and writing the compensation data corresponding to the second display area into the second internal storage unit, and further storing the compensation data into the external memory.
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