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CN-121982992-A - Display device and pixel precharge control method

CN121982992ACN 121982992 ACN121982992 ACN 121982992ACN-121982992-A

Abstract

The application discloses a display device and a pixel precharge control method, which belong to the technical field of display devices; then, according to gray level data of a picture to be displayed, a pre-charging area is determined in a display of the display device through a time sequence controller, a pre-charging control signal is output to control a pre-charging circuit corresponding to the pre-charging area, each sub-pixel in the pre-charging area is pre-charged before each sub-pixel in the pre-charging area is charged, each sub-pixel in the pre-charging area is pre-charged to a pre-charging voltage, when each sub-pixel in the pre-charging area is connected with a data voltage, charging or discharging can be started from the pre-charging voltage, charging time required by each sub-pixel in the pre-charging area is shortened, the problem of insufficient charging of a pixel unit is solved, the display device is pre-charged in a partitioning mode, and the display effect of the display device is improved.

Inventors

  • FU WEI

Assignees

  • 武汉华星光电技术有限公司

Dates

Publication Date
20260505
Application Date
20260213

Claims (10)

  1. 1. A display device, comprising: The display area comprises a plurality of pixel units which are arranged in an array way, wherein each pixel unit comprises three sub-pixels which are transversely arranged; a plurality of pre-charge circuits, each of which is connected with a plurality of sub-pixels; a timing controller, connected to the precharge circuit, configured to: And determining a pre-charging area from the display area according to gray scale data of a picture to be displayed, outputting a pre-charging control signal, controlling the pre-charging circuit corresponding to the pre-charging area, and pre-charging the sub-pixels before charging the sub-pixels in the pre-charging area.
  2. 2. The display device of claim 1, wherein the display area comprises a plurality of preset partitions, each of the precharge circuits is connected to each of the sub-pixels in one of the preset partitions, and the precharge circuit comprises a plurality of first switching devices; The first switching device comprises a first end connected with one row of the sub-pixels, a second end connected with a pre-charging voltage and a control end connected with the pre-charging control signal.
  3. 3. The display device of claim 2, further comprising a plurality of pass-by circuits; The cascade circuit is connected with the time sequence controller and one of the precharge circuits and is used for responding to a starting signal output by the time sequence controller and outputting a plurality of precharge control signals transmitted according to the secondary, so that each first switching device in the precharge circuit is sequentially conducted and precharges the sub-pixels in the corresponding preset partition.
  4. 4. The display device of claim 3, wherein the timing controller is further configured to: Determining the pre-charging area from a plurality of preset areas according to the gray scale data; Outputting the starting signal in a first level state to a first level transmission circuit corresponding to the pre-full area, so that the first level transmission circuit outputs a plurality of pre-charge control signals in a first level state according to secondary transmission according to the starting signal, and each first switching device in the pre-charge circuit corresponding to the pre-full area is controlled to be sequentially conducted to pre-charge the sub-pixels in the pre-charge area; Outputting the starting signal in a second level state to second level transmission circuits corresponding to other preset partitions except the pre-charging partition, so that the second level transmission circuits output the pre-charging control signal in the second level state according to the starting signal to control each first switching device in the pre-charging circuit corresponding to the other preset partitions to be turned off, and stopping pre-charging the sub-pixels in the other preset partitions.
  5. 5. The display device of claim 1, wherein the display area comprises a plurality of preset partitions, each of the precharge circuits is connected to the sub-pixels in one of the preset partitions, and the precharge circuit comprises a plurality of second switching devices; The second switching device comprises a first end connected with one row of the sub-pixels, a second end connected with a pre-charging voltage and a control end connected with the pre-charging control signal.
  6. 6. The display device of claim 5, wherein the three sub-pixels comprise a red sub-pixel, a green sub-pixel, and a blue sub-pixel, the timing controller further configured to: Determining the pre-charging area from a plurality of preset areas according to the gray scale data; Outputting the pre-charge control signal in a first level state to the pre-charge circuit corresponding to the pre-charge area, so that each second switching device in the pre-charge circuit corresponding to the pre-charge area is sequentially turned on, when the red sub-pixel of the current scanning line in the pre-charge area is charged, the second switching device corresponding to the green sub-pixel is turned on, the green sub-pixel of the current scanning line is pre-charged, when the green sub-pixel of the current scanning line is charged, the second switching device corresponding to the blue sub-pixel is turned on, the blue sub-pixel of the current scanning line is pre-charged, and when the blue sub-pixel of the current scanning line is charged, the second switching device corresponding to the red sub-pixel is turned on, and the red sub-pixel of the next scanning line of the current scanning line is pre-charged; Outputting the precharge control signals in the second level state to the precharge circuits corresponding to the other preset partitions except the precharge partition, so that each second switching device in the precharge circuit corresponding to the other preset partitions is turned off, and the precharge of the red sub-pixel, the green sub-pixel and the blue sub-pixel in the other preset partitions is stopped.
  7. 7. The display device according to claim 6, further comprising a plurality of data lines and a plurality of charging circuits each connected to one of the data lines and one of the columns of the pixel units, the charging circuits including a third switching device, a fourth switching device, and a fifth switching device; The third switching device comprises a first end connected with the data line, a second end connected with the red sub-pixel and a control end connected with a charging control signal; The fourth switching device comprises a first end connected with the data line, a second end connected with the green sub-pixel and a control end connected with the charging control signal; The fifth switching device comprises a first end connected with the data line, a second end connected with the blue sub-pixel and a control end connected with the charging control signal; the first end of the second switching device is connected with the second end of the third switching device, the second end of the fourth switching device or the second end of the fifth switching device.
  8. 8. The display device according to any one of claims 1 to 7, further comprising a power management chip; The power management chip is connected with the pre-charging circuit and is used for outputting pre-charging voltage to the pre-charging circuit, wherein the pre-charging voltage is the average value of the maximum value and the minimum value of the data voltage.
  9. 9. The display device of claim 1, wherein the timing controller is further configured to: And judging whether the picture to be displayed is a pure-color picture or not according to the gray-scale data, and outputting the precharge control signal in a second level state when the picture to be displayed is judged to be the pure-color picture, so that the precharge circuit stops precharging all the sub-pixels.
  10. 10. A pixel precharge control method, applied to the display apparatus according to any one of claims 1 to 9, comprising: And determining a pre-charging area from the display area according to gray scale data of a picture to be displayed, outputting a pre-charging control signal, controlling the pre-charging circuit corresponding to the pre-charging area, and pre-charging the sub-pixels before charging the sub-pixels in the pre-charging area.

Description

Display device and pixel precharge control method Technical Field The present application relates to the field of display devices, and in particular, to a display device and a pixel precharge control method. Background Under the condition of higher refresh rate, in order to ensure that the screen of an OLED (Organic Light-Emitting Diode Display) display screen is normally displayed, display anomalies such as uneven brightness, residual shadows, color cast and the like of the picture are avoided, and the data line needs to be charged to the target voltage in a short time by enough charging rate. However, in order to reduce the number of source driver ICs (INTEGRATED CIRCUIT CHIP: integrated circuit chips), the display panel often adopts a MUX3 driving architecture, that is, the data lines of 3 columns of sub-pixels are driven by the same data voltage, so that the charging time of each pixel unit is further reduced under the condition of the same refresh rate, resulting in the problem of insufficient charging of the pixel unit. In the related art, the precharge of the pixel units can be realized by setting the precharge circuit so as to shorten the charge time required by each pixel unit, but the related precharge mode is to precharge all the pixel units of the whole OLED display screen, so that the problem of high precharge power consumption requirement exists. Disclosure of Invention The embodiment of the application provides a display panel to at least partially solve the technical problems. To achieve the above object, in a first aspect, there is provided a display device comprising: The display area comprises a plurality of pixel units which are arranged in an array, wherein each pixel unit comprises three sub-pixels which are transversely arranged; A plurality of pre-charge circuits, each pre-charge circuit being connected to a plurality of sub-pixels; a timing controller, connected to the precharge circuit, configured to: and determining a pre-charge area from the display area according to the gray scale data of the picture to be displayed, outputting a pre-charge control signal, controlling a pre-charge circuit corresponding to the pre-charge area, and pre-charging the sub-pixels before charging the sub-pixels in the pre-charge area. Optionally, the display area includes a plurality of preset partitions, each precharge circuit is connected with each sub-pixel in one preset partition, and the precharge circuit includes a plurality of first switching devices; The first switching device includes a first terminal connected to a row of sub-pixels, a second terminal connected to a precharge voltage, and a control terminal connected to a precharge control signal. Optionally, the circuit also comprises a plurality of level transmission circuits; The secondary transmission circuit is connected with the time sequence controller and a pre-charging circuit and is used for responding to the starting signal output by the time sequence controller and outputting a plurality of pre-charging control signals according to secondary transmission, so that each first switching device in the pre-charging circuit is sequentially conducted to pre-charge the corresponding sub-pixels in the preset subarea. Optionally, the timing controller is further configured to: Determining a pre-charging area from a plurality of preset areas according to the gray scale data; Outputting a starting signal in a first level state to a first level transmission circuit corresponding to the pre-full area, so that the first level transmission circuit outputs a plurality of pre-charge control signals in the first level state according to secondary transmission according to the starting signal, and each first switching device in the pre-charge circuit corresponding to the pre-full area is controlled to be sequentially conducted to pre-charge sub-pixels in the pre-charge area; And outputting a starting signal in a second level state to the second level transmission circuits corresponding to the other preset partitions except the pre-sufficient partition, so that the second level transmission circuit outputs a pre-charge control signal in the second level state according to the starting signal to control each first switching device in the pre-charge circuits corresponding to the other preset partitions to be turned off, and stopping pre-charging the sub-pixels in the other preset partitions. Optionally, the display area includes a plurality of preset partitions, each precharge circuit is connected with a sub-pixel in one preset partition, and the precharge circuit includes a plurality of second switching devices; the second switching device comprises a first end connected with a row of sub-pixels, a second end connected with the pre-charging voltage and a control end connected with the pre-charging control signal. Optionally, the three sub-pixels include a red sub-pixel, a green sub-pixel, and a blue sub-pixel, and the timing controller is further confi