Methods, apparatus, and storage media for dimming a display screen

• US 10,699,675 B2
• Filed: 05/14/2018
• Issued: 06/30/2020
• Est. Priority Date: 06/30/2017
• Status: Active Grant

• Current Assignee: Kunshan Govisionox Optoelectronics Co., Ltd (Visionox Technology, Inc.)
• Original Assignee: Kunshan Govisionox Optoelectronics Co., Ltd (Visionox Technology, Inc.)
• Inventors: Wang, Yuqing
• Primary Examiner(s): Sharifi-Tafreshi, Koosha
• Application Number:
  US16/328,735
• Publication Number:
  US 20200111448A1
• Time in Patent Office: 778 Days
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0633 by amplitude modulation of the brightness of the illumination source
• CPC Class Codes: G09G 2320/064 by time modulation of the brightness of the illumination source
• CPC Class Codes: G09G 2320/0653 Controlling or limiting the speed of brightness adjustment of the illumination source
• CPC Class Codes: G09G 2360/144 the light being ambient light
• CPC Class Codes: G09G 3/2081 with combination of amplitude modulation and time modulation space and time error diffusion G09G3/2066
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: G09G 5/10 Intensity circuits
• CPC Class Codes: H01L 29/786 Thin film transistors, i.e. transistors with a channel being at least partly a thin film transistors having only the source or the drain region on an insulator layer H01L29/0653; thin film FinFETs H01L29/785

Abstract

Disclosed are methods, apparatus, and storage media for dimming a display screen. The method includes: acquiring a parameter value of the display screen to be adjusted, wherein the parameter value has a correspondence with a brightness of the display screen; and comparing the parameter value with a set threshold to obtain a comparison result, and determining a corresponding dimming mode according to the comparison result, and performing dimming on the display screen via the corresponding dimming mode. The above method for dimming a display screen that determines a dimming mode according to a comparison result may overcome the deficiency caused by determining only one dimming mode, and may further mitigate impacts on the display quality while dimming.

Claims

1. A method for dimming a display screen, comprising:

acquiring a parameter value of the display screen to be adjusted, wherein the parameter value has a correspondence with a brightness of the display screen;

comparing the parameter value with a set threshold to obtain a comparison result;

determining a corresponding dimming mode according to the comparison result,

wherein the display screen drives a pixel by a thin-film transistor,

when the corresponding dimming mode is a first dimming mode, the method comprises adopting a first dimming mode to perform the dimming on the display screen when it is determined that the brightness corresponding to the parameter value is less than the set threshold, a voltage of a data signal received by a pixel driving circuit in the display screen being unchanged during a process of the dimming in the first dimming mode; and

when the corresponding dimming mode is a second dimming mode, the method comprises adopting a second dimming mode when it is determined that the brightness corresponding to the parameter value is not less than the set threshold, wherein the dimming is performed by adjusting the voltage of the data signal in the second dimming mode.

2. The method of claim 1, wherein the second dimming mode is a source dimming method.

3. The method of claim 1, wherein the dimming is performed by adjusting an illumination period of a pixel of the display screen in each frame in the first dimming mode.

4. The method of claim 1, wherein the parameter value comprises a brightness value.

5. The method of claim 4, wherein the set threshold is between 70 nits and 90 nits.

6. An apparatus for dimming a display screen, comprising:

a parameter value acquisition circuit configured to acquire a parameter value of the display screen to be adjusted, the parameter value having a correspondence with a brightness of the display screen; and

a dimming determination circuit configured to compare the parameter value with a set threshold, and the dimming determination circuit further configured to determine a corresponding dimming mode according to a comparison result,

wherein the display screen drives a pixel by a thin-film transistor, and the dimming determination circuit is configured to perform the dimming on the display screen when it is determined that the brightness corresponding to the parameter value is less than the set threshold, wherein a voltage of a data signal received by a pixel driving circuit in the display screen is unchanged during a process of the dimming in the first dimming mode; and

the dimming determination circuit is configured to perform the dimming on the display screen when it is determined that the brightness corresponding to the parameter value is not less than the set threshold, wherein the dimming is performed by adjusting the voltage of the data signal in the second dimming mode.

7. A method for dimming a display screen, comprising:

acquiring a parameter value of the display screen to be adjusted, the parameter value being correspondent with a brightness of the display screen;

comparing the parameter value with a set threshold to obtain a comparison result;

determining a corresponding dimming mode according to the comparison result; and

performing dimming on the display screen via the corresponding dimming mode,

wherein the parameter value comprises a brightness value, and

wherein the set threshold is between 70 nits and 90 nits.