Light-dimming plate, backlight module, display device and driving method thereof

Abstract

The embodiment of the invention provides a light-dimming plate, a backlight module, a display device and a driving method thereof, and relates to the technical field of the display. Various disadvantages caused by adopting a direct type backlight module in a HDR image display in the prior art can be avoided; the light-dimming plate comprises a first base and a second base opposite to each other, and a polymer dispersion liquid crystal layer located between the first base and the second base; the light-dimming plate is divided into multiple light-dimming areas; the light-dimming plate further comprises a first electrode and a second electrode located in each light-dimming area, the first electrodes in different light-diming areas are independently arranged; the first electrode and the second electrode are used for driving the polymer dispersion liquid crystal molecules in the polymer dispersion liquid crystal layer, thereby controlling the light transmittance of each light-dimming area.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a dimmer, a backlight module, a display device and a driving method thereof. Background technique [0002] High-Dynamic Range (HDR) images, compared with ordinary images, can provide more dynamic range and image details, and better reflect the visual effects of people in the real environment. Therefore, the current display technology is getting better and better. More and more development towards high resolution, HDR and so on. [0003] Among them, the existing HDR liquid crystal display (Liquid Crystal Display, LCD) usually adopts the backlight module (BLU) of the direct type structure, by controlling the brightness of the light emitting diode (Light Emitting Diode, LED) in different areas of the BLU, To adjust the contrast of light and shade in different local areas (that is, Local Dimming technology), to enhance the contrast between the darkest area and the brightest area in...

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Problems solved by technology

[0004] However, for small-sized LCDs (such as mobile phones, tablet computers, etc.), if the above-mentioned control of the brightness of the LEDs in the BLU is used to adjust the contrast between light and dark in different local areas, since a large number of LEDs need to be set in the BLU, Moreover, the packaging structure is complex, and the thickness of the BLU of the direct-type structure is relatively large, so it is difficult to meet the needs of small-sized LCDs.

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