Screen brightness adjustment method and device, display device
A screen brightness and adjustment method technology, applied in the computer field, can solve the problems of small pulse width modulation signal, fatigue, strong eyes, etc., and achieve the effect of reducing fatigue and reducing the flickering feeling of human eyes
Active Publication Date: 2021-01-26
BOE TECH GRP CO LTD +1
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Problems solved by technology
Especially when the brightness of the screen is low, the duty ratio of the pulse width modulation signal corresponding to PWM dimming is small, which easily brings a strong sense of fatigue to the user's eyes
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[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are only some of the embodiments of the present disclosure, not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present disclosure.
[0038] At present, most OLED displays use 250Hz low-frequency PWM dimming technology. When the screen brightness is low, the rate of stroboscopic flicker caused by low-frequency PWM dimming technology will also be reduced, that is, the duty cycle of the corresponding pulse width modulation signal will become smaller, making stroboscopic flicker easier to be perceived by human eyes . In this way, sensitive people are more likely to feel dis...
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Embodiments of the present disclosure provide a method and device for adjusting screen brightness, and a display device, which can avoid a small PWM duty ratio in a low-brightness mode, so as to reduce eye fatigue caused by the PWM dimming process. The screen brightness adjustment method includes: in the first brightness mode, dividing all pixels in the screen into N pixel groups; taking N frames of pictures continuously displayed as a display cycle, and when displaying the Mth frame of pictures in the display cycle, Drive the pixel display corresponding to the Mth pixel group, and at the same time adjust the duty cycle of the pulse width modulation signal to the first threshold, N≥M≥1; the ratio of the display brightness of the Mth frame picture on the screen to the maximum display brightness of the screen = the Mth The ratio of the number of pixels in the pixel group to the number of all pixels in the screen×the first threshold. The screen brightness adjustment method provided by the embodiments of the present disclosure is used to adjust the screen brightness of an OLED display device in a dark environment.
Description
technical field [0001] The present disclosure relates to the technical field of computers, in particular to a screen brightness adjustment method. Background technique [0002] With the impact of the trend of large screens, full screens, and thin and light models, more and more mobile phones use Organic Light-Emitting Diode (OLED) screens. Compared with Liquid Crystal Display (LCD for short) screens, OLED screens have many advantages: light and thin, power saving, and good color. [0003] At present, most mobile phones with OLED screens use high-brightness direct current (DC) dimming and low-brightness pulse width modulation (Pulse Width Modulation, PWM) dimming to adjust the brightness of their screens. adjust. [0004] However, due to the PWM dimming, the screen of the mobile phone will always be in a state of alternating between on and off, so as to achieve the purpose of reducing the brightness of the screen. Therefore, when the screen is in PWM dimming mode, the flic...
Claims
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IPC IPC(8): G09G3/3233
CPCG09G3/3233
Inventor 代伟男徐映嵩汪杨鹏
Owner BOE TECH GRP CO LTD