CN-117292655-B - Backlight device for improving dynamic blur, operating method and display device

Abstract

The invention provides a backlight device, an operation method and a display device for improving dynamic blur. The display device includes a display panel, a scaler integrated circuit, and a backlight device. The backlight device comprises N light areas for providing backlight to the display panel, wherein N is a positive integer. The backlight device illuminates each of the N light zones in a time-sharing manner in each of a plurality of scanning periods. The time period of each of these scanning periods is longer than or equal to the time period of the video effective data of the display panel. The continuous lighting time of each of the N light zones is less than or equal to the quotient of the time duration of the video payload divided by N.

Inventors

• CHEN MINZHI

Assignees

• 苏州佳世达电通有限公司
• 佳世达科技股份有限公司

Dates

Publication Date

20260508

Application Date

20220617

Claims (9)

1. 1. A backlight device, comprising: A backlight module including N light regions for providing backlight to the display panel, wherein N is a positive integer, and The local dimming circuit is coupled to the backlight module and used for lighting each of the N light areas in a time-sharing mode in each of a plurality of scanning periods; the display panel comprises a plurality of display frames, a plurality of scanning periods, a variable refresh rate mode and a non-variable refresh rate mode, wherein the plurality of scanning periods are asynchronous with the plurality of display frames of the display panel so as to be suitable for the variable refresh rate mode and the non-variable refresh rate mode of the display panel, the time length of each scanning period is longer than or equal to the time length of the video effective data period of the display panel, and the continuous lighting time length of each of the N light areas is smaller than or equal to the quotient of the time length of the video effective data period divided by N.
2. 2. The backlight device of claim 1, wherein the time periods of the plurality of scan periods are equal to each other.
3. 3. The backlight device of claim 1, wherein a time period of each of the plurality of scan periods is less than or equal to a time period of a display frame of the display panel.
4. 4. The backlight device according to claim 1, wherein the local dimming circuit performs a local dimming calculation to dynamically adjust the brightness of each of the N light zones, or the local dimming circuit performs a black insertion calculation to dynamically adjust the continuous lighting time of each of the N light zones.
5. 5. A method of operating a backlight device, comprising: illuminating each of N light areas of a backlight module of the backlight device in a time-sharing mode in each of a plurality of scanning periods by a regional dimming circuit of the backlight device so as to provide backlight to a display panel, wherein N is a positive integer; wherein the plurality of scanning periods are asynchronous to the plurality of display frames of the display panel to adapt to the variable refresh rate mode and the non-variable refresh rate mode of the display panel, the local dimming circuit adjusts the time period of the plurality of scanning periods so that the time period of each of the plurality of scanning periods is longer than or equal to the time period of the video valid data period of the display panel, and The continuous lighting time of each of the N light zones is adjusted by the local dimming circuit so that the continuous lighting time of each of the N light zones is less than or equal to the quotient of the time duration of the video payload period divided by N.
6. 6. The method of claim 5, wherein the time periods of the plurality of scan periods are equal to each other.
7. 7. The method of operation of claim 5, wherein a time period of each of the plurality of scan periods is less than or equal to a time period of a display frame of the display panel.
8. 8. The method of operation of claim 5, further comprising: performing a local dimming calculation by the local dimming circuit to dynamically adjust the brightness of each of the N light zones, or A black insertion calculation is performed by the local dimming circuit to dynamically adjust the continuous lighting time of each of the N light zones.
9. 9. A display device, comprising: A display panel; a scaler integrated circuit coupled to the display panel, and The backlight device of any of claims 1-4, coupled to the scaler integrated circuit.

Description

Backlight device for improving dynamic blur, operating method and display device Technical Field The present invention relates to the field of backlight display, and more particularly, to a backlight device, an operation method, and a display device for improving motion blur. Background A Liquid Crystal Display (LCD) is a common hold-type display. That is, for each pixel, the pixel value is maintained until updated in the next video frame (video frame). Due to this persistence feature, the object moving in the screen is static (not moving) before a new screen update. The user can have a desired position according to the moving speed of the object when viewing the object in the picture, but the motion blur phenomenon is generated by the human eye vision due to the persistence characteristic of the liquid crystal display. Motion blur reduces image quality and may cause viewing discomfort. How to improve the motion blur is one of many technical problems in the art. Disclosure of Invention The invention provides a backlight device, an operating method and a display device, which are used for improving motion blurs. In view of the above object, the present invention provides a backlight device comprising: A backlight module including N light regions for providing backlight to the display panel, wherein N is a positive integer, and The backlight module comprises a plurality of N light areas, a local dimming circuit, a display panel and a display device, wherein the local dimming circuit is coupled to the backlight module and used for lighting each of the N light areas in a time-sharing mode in each of a plurality of scanning periods, the time length of each of the plurality of scanning periods is larger than or equal to the time length of a (Video ACTIVE DATA) data period of the display panel, and the continuous lighting time length of each of the N light areas is smaller than or equal to the quotient of the time length of the Video effective data period divided by N. Preferably, the time periods of the plurality of scanning periods are equal to each other. Preferably, the time period of each of the plurality of scan periods is less than or equal to the time period of the display frame of the display panel. Preferably, the plurality of scanning periods are not synchronous with a plurality of display frames of the display panel. Preferably, the local dimming circuit performs a local dimming calculation to dynamically adjust the brightness of each of the N light zones, or the local dimming circuit performs a black insertion calculation to dynamically adjust the continuous lighting time of each of the N light zones. Based on the above object, the present invention also proposes an operating method of a backlight device, comprising: illuminating each of N light areas of a backlight module of the backlight device in a time-sharing mode in each of a plurality of scanning periods by a regional dimming circuit of the backlight device so as to provide backlight to a display panel, wherein N is a positive integer; adjusting the time length of the plurality of scanning periods by the local dimming circuit so that the time length of each of the plurality of scanning periods is greater than or equal to the time length of the video effective data period of the display panel, and The continuous lighting time of each of the N light zones is adjusted by the local dimming circuit so that the continuous lighting time of each of the N light zones is less than or equal to the quotient of the time duration of the video payload period divided by N. Preferably, the time periods of the plurality of scanning periods are equal to each other. Preferably, the time period of each of the plurality of scan periods is less than or equal to the time period of the display frame of the display panel. Preferably, the plurality of scanning periods are not synchronous with a plurality of display frames of the display panel. Preferably, the method further comprises performing a local dimming calculation by the local dimming circuit to dynamically adjust the brightness of each of the N light zones. Preferably, the method further comprises performing a black insertion calculation by the local dimming circuit to dynamically adjust the continuous lighting time of each of the N light zones. In view of the above, the present invention also proposes a display device including a display panel, a Scaler integrated circuit (Scaler IC) coupled to the display panel, and a backlight device coupled to the Scaler integrated circuit, wherein the backlight device includes N light regions for providing backlight to the display panel, N is a positive integer, the backlight device lights each of the N light regions in a time-sharing manner in each of a plurality of scan periods, a time period of each of the plurality of scan periods is greater than or equal to a time period of video valid data of the display panel, and a continuous lighting time period of each of the N li