A kind of backlight module and display device
A backlight module and liquid crystal display panel technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of low color purity of RGB color film and low color gamut of liquid crystal display, and achieve high color purity and improved color gamut Effect
Active Publication Date: 2022-06-07
BOE TECH GRP CO LTD +1
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Problems solved by technology
However, due to the low color purity of the RGB color filter in the LCD panel, the color gamut of the LCD is low.
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[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0031] The shapes and sizes of the components in the drawings do not reflect the actual scale, and are only intended to illustrate the content of the present invention.
[0032] A backlight module provided by an embodiment of the present invention, such as figure 1 As shown, it includes: a light guide plate 01, a light source 02 located at the side end of the light guide plate 01, and a light diffusion layer 03 and a light reflecti...
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The invention discloses a backlight module and a display device. After the light emitted by the light source passes through the light guide of the light guide plate, it is emitted from the side facing the light diffusion layer, and a uniform surface light source is formed through the light diffusion layer to irradiate the light reflection part. Since the pitches of the cholesteric liquid crystal layers in sub-pixels of different colors in the light reflection part are different under the action of different electric fields, the cholesteric liquid crystal layers reflect the light of the color of the corresponding sub-pixels. The light reflected by the cholesteric liquid crystal layer is then mixed into uniformly distributed white light through the light diffusion layer, which is used as the backlight of the liquid crystal display panel. Due to the high color purity of the light reflected by the cholesteric liquid crystal layer, the backlight module can improve the color gamut of the liquid crystal display panel when used as the backlight of the liquid crystal display panel.
Description
technical field [0001] The present invention relates to the field of display technology, in particular to a backlight module and a display device. Background technique [0002] A liquid crystal display device is a passive light-emitting device that does not emit light itself, and requires a backlight module to provide a light source for the liquid crystal panel to display images. The backlight module is widely used in display devices because it has the characteristics of being light, thin and power-saving when used on a liquid crystal panel. [0003] At present, the backlight module technologies mainly used in liquid crystal display devices are: Cold Cathode Fluorescent Lamp (CCFL) and Light Emitting Diodes (LED). According to the optical structure, the backlight module is divided into two types: direct type and edge type. However, in the prior art, no matter what kind of optical structure the backlight module is, the white light emitted by the light source in the backligh...
Claims
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IPC IPC(8): G02F1/13357G02F1/137
CPCG02F1/133615G02F1/13718
Inventor 任锦宇冯莎王丹徐长健胡滕滕
Owner BOE TECH GRP CO LTD