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Display device and brightness adjusting method

A display device and brightness adjustment technology, which is applied to static indicators, cathode ray tube indicators, instruments, etc., can solve the problems that the brightness of the display device cannot be adjusted downward, can no longer be adjusted downward, and cannot meet the needs of use.

Inactive Publication Date: 2017-10-03
BOE TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, there is a situation where the minimum duty cycle can only be set to 1%, which leads to the fact that the brightness of the display device cannot be adjusted downward when it is adjusted to a certain level, and cannot meet the needs of some special industries.
[0004] For example, for a display device with an output brightness of 600 nit, when the duty cycle of the PWM signal is 1%, the output brightness can only reach 10 nit, and it cannot be adjusted downward.

Method used

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] An embodiment of the present invention provides a display device, such as figure 1 As shown, it includes: a backlight module 10, a display panel 20, a first backlight driving part 31 and a second backlight driving part 32; the backlight module 10 includes a backlight source 101; the first backlight driving part 31 and the second backlight driving part 32 Both are connected to the backlight source 101; the first backlight driving part 31 is also connecte...

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Abstract

The embodiment of the invention provides a display device and a brightness adjusting method and relates to the technical field of displaying. By using the bright adjusting method, a brightness adjusting interval of the display device can be improved. The display device comprises a backlight module, a display panel, a first backlight driving component and a second backlight driving component, wherein the first backlight driving component is connected with a PWM (Pulse Width Modulation) signal generating module and used for driving a backlight source to illuminate by a PWM signal outputted by the PWM signal generating module and enabling the brightness of the display panel to be within the ranges of a first brightness value and a second brightness value; the second backlight driving component is connected with the PWM signal generating module and used for driving the backlight source to illuminate by the PWM signal outputted by the PWM signal generating module and enabling the brightness of the display panel to be within the ranges of a third brightness value and a fourth brightness value; the first brightness value is smaller than the second brightness value, and the third brightness value is smaller than the fourth brightness value and the first brightness value; the fourth brightness value is greater than or equal to the first brightness value and smaller than the second brightness value.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a display device and a method for adjusting brightness. Background technique [0002] Display devices are classified into active light emitting type display devices and passive light emitting type display devices. At the present stage, passive light-emitting display devices still occupy a dominant position. [0003] At present, the brightness of the passive light-emitting display device depends on the brightness of the backlight source, and the brightness of the backlight source is adjusted by a PWM (Pulse Width Modulation, pulse width modulation) signal. However, in practical applications, there is a situation that the minimum duty cycle can only be set to 1%, which results in that the brightness of the display device cannot be adjusted downward when adjusted to a certain level, and cannot meet the use requirements of some special industries. [0004] For example, for a displ...

Claims

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Application Information

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IPC IPC(8): G09G3/34G09G5/10
CPCG09G3/3406G09G3/3413G09G3/342G09G5/10G09G2320/064
Inventor 王志成郝小康
Owner BOE TECH GRP CO LTD
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