Backlight module and display device
A backlight module and display device technology, applied in the direction of light guides, optics, optical components, etc., can solve the problems of reduced light energy utilization rate, long optical path of reflected light, and poor light directivity, etc., so as to improve the light energy utilization rate Effect
Pending Publication Date: 2020-03-24
BOE TECH GRP CO LTD
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However, as the size of VR display products decreases, the distance between the side-type backlight and the reflector is shortened, and more and more light emitted by the side-type backlight will be reflected by the reflector and become reflected light, and the reflected light The optical path is longer, if the reflected light cannot be used for light pointing, it will lead to a decrease in the utilization rate of light energy
In addition, the side-type backlight composed of double light strips is led out by the light guide plate, and then becomes uniform outgoing light after the diffusion sheet and prism group above the light guide plate work together, resulting in poor light directivity and low light energy utilization efficiency. Low
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[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Apparently, the described embodiments are some of the embodiments of the present application, but not all of them. Based on the described embodiments of the present application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present application.
[0032] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by those skilled in the art to which the application belongs. "First", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance...
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The invention discloses a backlight module and a display device. The backlight module comprises a light guide plate and a prism film located at one side of the light emitting surface of the light guide plate. The prism film comprises a base material and a plurality of strip-shaped prisms which are arranged at the side, facing the light guide plate, of the base material, extend along a first direction and are arranged along a second direction, the base angles of the strip-shaped prisms meet the following conditions that the light rays which are emitted by the light guide plate and form the symmetrical included angles with the normal are respectively emitted to the two side surfaces of the strip-shaped prisms and then are emitted in a same set direction, and the prism film has at least two light emitting directions. The light rays which are emitted by the light guide plate and form the symmetrical included angles with the normal can be the light rays emitted by the side-in type backlightemitted by the light guide plate and the light rays reflected by a reflector plate respectively, or can be the light rays emitted by the double light bars emitted by the light guide plate respectively, and the prism film enables the light rays to have at least two set light emitting directions, so that according to the backlight module, the directional light emitting is achieved, and the light energy utilization rate is increased.
Description
technical field [0001] The present application relates to the field of display technology, in particular to a backlight module and a display device. Background technique [0002] In related technologies, the size of virtual reality (VR) display products is small, and with the continuous development of VR systems, the size of VR display products continues to decrease, for example, some VR display products have been reduced to 2.48 inches. VR display products include backlight modules and liquid crystal (LCD) display modules. In order to meet the high brightness requirements of VR display products, the backlight module generally sets side-type backlights and reflectors on the two opposite sides of the light guide plate, or adopts side-type backlights composed of double light bars. However, as the size of VR display products decreases, the distance between the side-type backlight and the reflector shortens, and more and more light emitted by the side-type backlight will be ref...
Claims
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Login to View More IPC IPC(8): G02B6/00G02F1/13357G02B5/04
CPCG02B5/045G02B6/0053G02F1/133606G02F1/133607G02B5/0808G02B6/0055G02B6/0068G02B27/0172
Inventor 金亮亮杨泽洲马若玉
Owner BOE TECH GRP CO LTD