A dimmer, a backlight module, a display device and a driving method thereof

Abstract

Embodiments of the present invention provide a dimmer, a backlight module, a display device and a driving method thereof, which relate to the field of display technology and can avoid various disadvantages caused by the use of a direct-type backlight module in HDR image display in the prior art ; The dimming sheet includes a first substrate and a second substrate oppositely arranged, and a polymer dispersed liquid crystal layer between the first substrate and the second substrate; the dimming sheet is divided into a plurality of dimming areas; the dimming sheet is also It includes: a first electrode and a second electrode located in each dimming area; wherein, the first electrodes located in different dimming areas are set independently; the first electrode and the second electrode are used to drive the polymerization in the polymer dispersed liquid crystal layer substances to disperse liquid crystal molecules to control the light transmittance of each 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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