Title:
BACKLIGHT CONTROL CHIP, DRIVING METHOD, BACKLIGHT CONTROL SYSTEM, AND NEAR-EYE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/115569
Kind Code:
A1
Abstract:
A backlight control chip (001), a driving method, a backlight control system, and a near-eye display device. The backlight control chip (001) is used for driving a backlight module, and comprises: a boost circuit (101), which is configured to receive and boost a variable frequency clock signal (EXT_CLK) into a synchronization signal (HVSYNC_IN), wherein the variable frequency clock signal (EXT_CLK) and the synchronization signal (HVSYNC_IN) both have the same refresh rate as variable refresh rate display; a gating circuit (102), which is configured to receive the synchronization signal (HVSYNC_IN), a fixed frequency signal (VSYNC), a variable frequency signal (512xVSYNC), a first frame rate control signal (HVSYNC_EN), and a second frame rate control signal (DPLL_ENB), control switching output of the synchronization signal (HVSYNC_IN) and the variable frequency signal (512xVSYNC) in response to the first frame rate control signal (HVSYNC_EN), and then control switching output of the synchronous signal (HVSYNC_IN) or the variable frequency signal (512xVSYNC) and the fixed frequency signal (VSYNC) in response to the second frame rate control signal (DPLL_ENB), wherein the fixed frequency signal (VSYNC) is used for completing generation of a master clock signal in the backlight control chip (001), the variable frequency signal (512xVSYNC) is independent of the refresh rate of the variable refresh rate display, and frame rate control signals comprises the first frame rate control signal (HVSYNC_EN) and the second frame rate control signal (DPLL_ENB).
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Inventors:
MENG ZHAOHUI (CN)
XUE ZIJIAO (CN)
XUE ZIJIAO (CN)
Application Number:
PCT/CN2021/141342
Publication Date:
June 29, 2023
Filing Date:
December 24, 2021
Export Citation:
Assignee:
BOE TECHNOLOGY GROUP CO LTD (CN)
BEIJING BOE OPTOELECTRONICS TECH CO LTD (CN)
BEIJING BOE OPTOELECTRONICS TECH CO LTD (CN)
International Classes:
G09G3/34
Foreign References:
| US20100156946A1 | 2010-06-24 | |||
| CN1155211A | 1997-07-23 | |||
| CN106097983A | 2016-11-09 | |||
| CN104680975A | 2015-06-03 | |||
| CN113506545A | 2021-10-15 | |||
| US20100053228A1 | 2010-03-04 | |||
| JP2013205574A | 2013-10-07 |
Attorney, Agent or Firm:
TDIP & PARTNERS (CN)
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