Backlight module

A technology of backlight module and light source, applied in the direction of light guide, optics, optical components, etc., can solve the problems of increasing the space of the light-emitting module, increasing the volume of the backlight module, etc.

Active Publication Date: 2021-09-03
HUAIAN DARFON ELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former will increase the space required to install the light-emitting module, and the latter will increase the volume of the backlight module itself

Method used

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Embodiment Construction

[0054] In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed descriptions are provided in conjunction with the embodiments.

[0055] see figure 1 and figure 2 . The backlight module 1 according to an embodiment includes a light guide structure 12 and a light source device 14 . The light guide structure 12 is formed by the material of the first optical medium (such as but not limited to a light-transmissible polymer material, such as by injection molding) and the light guide structure 12 has a light incident surface 122 and a light diffusion structure 124 (the range of which is within The dotted line box is shown in the figure), the light diffusion structure 124 is located inside the light guide structure 12 and includes a plurality of hollow structures 1242 . When the backlight module 1 is applied to a keyboard, the extending direction of the light incident surface 122 generally correspo...

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Abstract

The invention discloses a backlight module. The backlight module comprises a light guide structure; the light guide structure is made of a material of a first optical medium and is provided with a light incident surface and a light diffusion structure; the light diffusion structure is positioned on the inner side of the light guide structure and comprises at least one hollow structure. The hollow structure forms a space for accommodating a second optical medium, and the first optical medium is different from the second optical medium. Another backlight module comprises a light guide structure, the light guide structure comprises a light guide part, the light guide part extends in an extending direction and is provided with a first bending part, a second bending part, a light incident surface, a first reflecting surface and a second reflecting surface in the direction perpendicular to the extending direction, the first reflecting surface is located on the first bending part and faces the light incident surface, the second reflecting surface is located at the first bending part and faces the first reflecting surface. According to the backlight module, light reducing and mixing effects can be generated by utilizing the hollow structure or the internal reflecting surfaces, so that the light intensity distribution of backlight provided by the light guide structure is improved.

Description

technical field [0001] The invention relates to a backlight module, in particular to a backlight module with a light guide structure. Background technique [0002] Backlight modules are often used to provide backlighting for devices, and typically use point light sources. When the size of the light guide of the backlight module is small, for example, the light guide is elongated, and its light incident surface and light output surface are located on both sides of the extending direction. Light board. It is difficult for the light guide to effectively mix the light, so that the backlight provided by the backlight module is obviously uneven, and even produces obvious light spots. In order to make the backlight uniform, it is usually possible to increase the distance between the light-emitting surface of the backlight module and the backlight projection target, or increase the size of the light guide plate of the backlight module or stack multiple optical films on it, such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00
CPCG02B6/0013G02B6/0015G02B6/0068G02B6/0055
Inventor 古士永许文明古佑铨
Owner HUAIAN DARFON ELECTRONICS
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