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US-12626668-B2 - Data processing method and device

US12626668B2US 12626668 B2US12626668 B2US 12626668B2US-12626668-B2

Abstract

A data processing method and device, where the method includes: obtaining current-frame image data and a synchronization signal of the current-frame image data, processing the current-frame image data to obtain current-frame local dimming data, and outputting the current-frame local dimming data according to the synchronization signal of the current-frame image data, wherein an output starting moment of the current-frame local dimming data is earlier than an output termination moment of the current-frame image data, and an output termination moment of the current-frame local dimming data is later than the output termination moment of the current-frame image data, so that an output time period of the current-frame local dimming data partially overlaps with an output time period of the current-frame image data. By means of this arrangement, a liquid crystal display panel and a backlight unit display data of the same frame, thereby improving the display quality.

Inventors

  • Jun Cheol BAE
  • Youngjin LIM
  • Chenghui YAN

Assignees

  • Beijing Xianxin Technology Co., Ltd.

Dates

Publication Date
20260512
Application Date
20250314
Priority Date
20220916

Claims (17)

  1. 1 . A data processing method, comprising: obtaining current-frame image data and a synchronization signal of the current-frame image data; processing the current-frame image data to obtain current-frame local dimming data; outputting the current-frame local dimming data according to the synchronization signal of the current-frame image data; wherein an output starting moment of the current-frame local dimming data is earlier than an output termination moment of the current-frame image data, and an output termination moment of the current-frame local dimming data is later than the output termination moment of the current-frame image data; wherein before outputting the current-frame local dimming data according to the synchronization signal of the current-frame image data, the method further comprises: performing filtering processing on the current-frame local dimming data, and caching the filtered current-frame local dimming data; wherein a caching time is less than a time required for caching all data in the current-frame local dimming data.
  2. 2 . The data processing method according to claim 1 , wherein the outputting the current-frame local dimming data according to the synchronization signal of the current-frame image data specifically comprises: determining an output starting moment of each local dimming sub-data according to the synchronization signal of the current-frame image data; and outputting the local dimming sub-data at the output starting moment of each local dimming sub-data; wherein the current-frame local dimming data comprises a plurality of local dimming sub-data, and the output starting moment of each local dimming sub-data is later than an output starting moment of pixel data corresponding to the local dimming sub-data.
  3. 3 . The data processing method according to claim 1 , wherein the processing the current-frame image data to obtain the current-frame local dimming data, performing the filtering processing on the current-frame local dimming data, and caching the filtered current-frame local dimming data specifically comprise: inputting the current-frame image data into an extracting circuit, to obtain the current-frame local dimming data output by the extracting circuit; inputting the current-frame local dimming data into a filtering circuit, to obtain the filtered current-frame local dimming data output by the filtering circuit; inputting the filtered current-frame local dimming data into a caching circuit, to obtain the cached current-frame local dimming data output by the caching circuit.
  4. 4 . The data processing method according to claim 2 , wherein the processing the current-frame image data to obtain the current-frame local dimming data, performing the filtering processing on the current-frame local dimming data, and caching the filtered current-frame local dimming data specifically comprise: inputting the current-frame image data into an extracting circuit, to obtain the current-frame local dimming data output by the extracting circuit; inputting the current-frame local dimming data into a filtering circuit, to obtain the filtered current-frame local dimming data output by the filtering circuit; inputting the filtered current-frame local dimming data into a caching circuit, to obtain the cached current-frame local dimming data output by the caching circuit.
  5. 5 . The data processing method according to claim 1 , wherein after outputting the current-frame local dimming data according to the synchronization signal of the current-frame image data, the method further comprises: controlling a backlight unit to be disconnected with a power supply terminal during a non-overlapping time period between an output time period of the current-frame local dimming data and an output time period of the current-frame image data; controlling the backlight unit to be connected with the power supply terminal during an overlapping time period between the output time period of the current-frame local dimming data and the output time period of the current-frame image data, and driving the backlight unit according to the current-frame local dimming data.
  6. 6 . The data processing method according to claim 2 , wherein after outputting the current-frame local dimming data according to the synchronization signal of the current-frame image data, the method further comprises: controlling a backlight unit to be disconnected with a power supply terminal during a non-overlapping time period between an output time period of the current-frame local dimming data and an output time period of the current-frame image data; controlling the backlight unit to be connected with the power supply terminal during an overlapping time period between the output time period of the current-frame local dimming data and the output time period of the current-frame image data, and driving the backlight unit according to the current-frame local dimming data.
  7. 7 . The data processing method according to claim 5 , wherein the controlling the backlight unit to be disconnected with the power supply terminal during the non-overlapping time period between the output time period of the current-frame local dimming data and the output time period of the current-frame image data specifically comprises: controlling the backlight unit to be disconnected with the power supply terminal at an output starting moment of the current-frame image data; correspondingly, the controlling the backlight unit to be connected with the power supply terminal during the overlapping time period between the output time period of the current-frame local dimming data and the output time period of the current-frame image data, and driving the backlight unit according to the current-frame local dimming data specifically comprises: controlling the backlight unit to be connected with the power supply terminal at the output starting moment of the current-frame local dimming data.
  8. 8 . The data processing method according to claim 6 , wherein the controlling the backlight unit to be disconnected with the power supply terminal during the non-overlapping time period between the output time period of the current-frame local dimming data and the output time period of the current-frame image data specifically comprises: controlling the backlight unit to be disconnected with the power supply terminal at an output starting moment of the current-frame image data; correspondingly, the controlling the backlight unit to be connected with the power supply terminal during the overlapping time period between the output time period of the current-frame local dimming data and the output time period of the current-frame image data, and driving the backlight unit according to the current-frame local dimming data specifically comprises: controlling the backlight unit to be connected with the power supply terminal at the output starting moment of the current-frame local dimming data.
  9. 9 . The data processing method according to claim 5 , the controlling the backlight unit to be disconnected with the power supply terminal during the non-overlapping time period between the output time period of the current-frame local dimming data and the output time period of the current-frame image data specifically comprises: controlling the backlight unit to be disconnected with the power supply terminal at an output starting moment of the current-frame image data; correspondingly, the controlling the backlight unit to be connected with the power supply terminal during the overlapping time period between the output time period of the current-frame local dimming data and the output time period of the current-frame image data, and driving the backlight unit according to the current-frame local dimming data specifically comprises: controlling the backlight unit to be connected with the power supply terminal after controlling the backlight unit to be disconnected with the power supply terminal and experiencing a delay duration; wherein the delay duration refers to an output delay duration between the output starting moment of the current-frame local dimming data and the output starting moment of the current-frame image data.
  10. 10 . The data processing method according to claim 6 , the controlling the backlight unit to be disconnected with the power supply terminal during the non-overlapping time period between the output time period of the current-frame local dimming data and the output time period of the current-frame image data specifically comprises: controlling the backlight unit to be disconnected with the power supply terminal at an output starting moment of the current-frame image data; correspondingly, the controlling the backlight unit to be connected with the power supply terminal during the overlapping time period between the output time period of the current-frame local dimming data and the output time period of the current-frame image data, and driving the backlight unit according to the current-frame local dimming data specifically comprises: controlling the backlight unit to be connected with the power supply terminal after controlling the backlight unit to be disconnected with the power supply terminal and experiencing a delay duration; wherein the delay duration refers to an output delay duration between the output starting moment of the current-frame local dimming data and the output starting moment of the current-frame image data.
  11. 11 . The data processing method according to claim 5 , wherein the controlling the backlight unit to be connected with the power supply terminal during the overlapping time period between the output time period of the current-frame local dimming data and the output time period of the current-frame image data, and driving the backlight unit according to the current-frame local dimming data specifically comprises: controlling the backlight unit to be connected with the power supply terminal at the output starting moment of the current-frame local dimming data; correspondingly, the controlling the backlight unit to be disconnected with the power supply terminal during the non-overlapping time period between the output time period of the current-frame local dimming data and the output time period of the current-frame image data specifically comprises: controlling the backlight unit to be disconnected with the power supply terminal after controlling the backlight unit to be connected with the power supply terminal and experiencing an overlapping duration, wherein the overlapping duration is a duration in which the output time period of the current-frame local dimming data overlaps the output time period of the current-frame image data.
  12. 12 . The data processing method according to claim 6 , wherein the controlling the backlight unit to be connected with the power supply terminal during the overlapping time period between the output time period of the current-frame local dimming data and the output time period of the current-frame image data, and driving the backlight unit according to the current-frame local dimming data specifically comprises: controlling the backlight unit to be connected with the power supply terminal at the output starting moment of the current-frame local dimming data; correspondingly, the controlling the backlight unit to be disconnected with the power supply terminal during the non-overlapping time period between the output time period of the current-frame local dimming data and the output time period of the current-frame image data specifically comprises: controlling the backlight unit to be disconnected with the power supply terminal after controlling the backlight unit to be connected with the power supply terminal and experiencing an overlapping duration, wherein the overlapping duration is a duration in which the output time period of the current-frame local dimming data overlaps the output time period of the current-frame image data.
  13. 13 . A controller, comprising: a processor and a memory in communication connection with the processor; wherein the memory stores computer-executable instructions; and the processor executes the computer-executable instructions stored in the memory, so as to implement the following step: obtaining current-frame image data and a synchronization signal of the current-frame image data; processing the current-frame image data to obtain current-frame local dimming data; outputting the current-frame local dimming data according to the synchronization signal of the current-frame image data; wherein an output starting moment of the current-frame local dimming data is earlier than an output termination moment of the current-frame image data, and an output termination moment of the current-frame local dimming data is later than the output termination moment of the current-frame image data; wherein before outputting the current-frame local dimming data according to the synchronization signal of the current-frame image data, the method further comprises: performing filtering processing on the current-frame local dimming data, and caching the filtered current-frame local dimming data; wherein a caching time is less than a time required for caching all data in the current-frame local dimming data.
  14. 14 . The controller according to claim 13 , wherein the outputting the current-frame local dimming data according to the synchronization signal of the current-frame image data specifically comprises: determining an output starting moment of each local dimming sub-data according to the synchronization signal of the current-frame image data; and outputting the local dimming sub-data at the output starting moment of each local dimming sub-data; wherein the current-frame local dimming data comprises a plurality of local dimming sub-data, and the output starting moment of each local dimming sub-data is later than an output starting moment of pixel data corresponding to the local dimming sub-data.
  15. 15 . The controller according to claim 13 , wherein the processing the current-frame image data to obtain the current-frame local dimming data, performing the filtering processing on the current-frame local dimming data, and caching the filtered current-frame local dimming data specifically comprise: inputting the current-frame image data into an extracting circuit, to obtain the current-frame local dimming data output by the extracting circuit; inputting the current-frame local dimming data into a filtering circuit, to obtain the filtered current-frame local dimming data output by the filtering circuit; inputting the filtered current-frame local dimming data into a caching circuit, to obtain the cached current-frame local dimming data output by the caching circuit.
  16. 16 . The controller according to claim 13 , wherein after outputting the current-frame local dimming data according to the synchronization signal of the current-frame image data, the method further comprises: controlling a backlight unit to be disconnected with a power supply terminal during a non-overlapping time period between an output time period of the current-frame local dimming data and an output time period of the current-frame image data; controlling the backlight unit to be connected with the power supply terminal during an overlapping time period between the output time period of the current-frame local dimming data and the output time period of the current-frame image data, and driving the backlight unit according to the current-frame local dimming data.
  17. 17 . A display device, comprising a backlight unit, a source driver, a liquid crystal display panel and the controller according to claim 13 .

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Application No. PCT/CN2023/119257, filed on Sep. 15, 2023, which claims priority to Chinese Patent Application No. 202211131139.0, filed with the China National Intellectual Property Administration on Sep. 16, 2022 and entitled “DATA PROCESSING METHOD AND DEVICE”, both of which are hereby incorporated by reference in their entireties. TECHNICAL FIELD The present application relates to the field of display technologies and, in particular, to a data processing method and device. BACKGROUND In a display device, in addition to a liquid crystal display (LCD for short) panel for displaying images, a light-emitting diode (LED for short) is generally used as a backlight unit (BLU for short) to enhance the display effect. The data that controls the backlight unit to emit light is generally referred to as local dimming data, and the data that controls the liquid crystal display panel to display is referred to as image data. The local dimming data is generated based on the image data, and since the local dimming data is generally smaller than the image data, it is common to collect all the local dimming data before outputting it, so as to prevent the local dimming data from being output earlier than the image data. Therefore, there is a delay in the output between the local dimming data and the image data, and the output delay duration is greater than the output duration of one frame of image data, which means that the backlight unit and the liquid crystal display panel display data of different frames, resulting in low display quality. SUMMARY The present application provides a data processing method and device, to address the technical problem of low display quality caused by a backlight unit and a liquid crystal display panel displaying data of different frames. An embodiment of the present application provides a data processing method, and the method includes: obtaining current-frame image data and a synchronization signal of the current-frame image data;processing the current-frame image data to obtain current-frame local dimming data;outputting the current-frame local dimming data according to the synchronization signal of the current-frame image data; wherean output starting moment of the current-frame local dimming data is earlier than an output starting termination of the current-frame image data, and an output termination moment of the current-frame local dimming data is later than an output termination moment of the current-frame image data. In some embodiments, the outputting the current-frame local dimming data according to the synchronization signal of the current-frame image data specifically includes: determining an output starting moment of each local dimming sub-data according to the synchronization signal of the current-frame image data; and outputting the local dimming sub-data at the output starting moment of each local dimming sub-data;where the current-frame local dimming data includes a plurality of local dimming sub-data, and the output starting moment of each local dimming sub-data is later than an output starting moment of pixel data corresponding to the local dimming sub-data. In some embodiments, before outputting the current-frame local dimming data according to the synchronization signal of the current-frame image data, the method further includes: performing filtering processing on the current-frame local dimming data, and caching the filtered current-frame local dimming data; where a caching time is less than a time required for caching all data in the current-frame local dimming data. In some embodiments, the processing the current-frame image data to obtain the current-frame local dimming data, the performing the filtering processing on the current-frame local dimming data, and caching the filtered current-frame local dimming data specifically include: inputting the current-frame image data into an extracting circuit, to obtain the current-frame local dimming data output by the extracting circuit;inputting the current-frame local dimming data into a filtering circuit, to obtain the filtered current-frame local dimming data output by the filtering circuit;inputting the filtered current-frame local dimming data into a caching circuit, to obtain the cached current-frame local dimming data output by the caching circuit. In some embodiments, after outputting the current-frame local dimming data according to the synchronization signal of the current-frame image data, the method further includes: controlling a backlight unit to be disconnected with a power supply terminal during a non-overlapping time period between an output time period of the current-frame local dimming data and an output time period of the current-frame image data;controlling the backlight unit to be connected with the power supply terminal during an overlapping time period between the output time period of the current-frame local