TWI320122B - Backlight module - Google Patents

Description

1320122 IX. Description of the invention: [Technical field of invention] • This is a kind of backlight module for liquid crystal display (LCD). [Prior Art] Because of its advantages of lightness, thinness, and low power consumption, the liquid crystal display device is widely used in modern information equipment such as notebook computers, mobile phones, and personal digital assistants. However, since the liquid crystal of the liquid crystal display device itself has no illuminating property, in order to achieve the display effect, • a liquid crystal device, such as a backlight module, must be provided for the liquid crystal display device, and its function is to provide sufficient brightness and uniform distribution to the liquid crystal display device. The surface light source. Light-Emitting Diode (LED) has been widely used in backlight modules of liquid crystal display devices because of its low heat generation, power saving, long life and fast response. ^ Please - and refer to the first and second figures. The first figure is a schematic diagram of a prior art backlight module. The second figure is a schematic cross-sectional view along the line η_Π in the first figure. The backlight module 1 includes a light source 10, a light source cover 2A, and a light guide plate 3. The light guide plate Deng includes a light incident surface 31, a light exit surface connected to the light incident surface 31, and a bottom surface 33 opposite to the light exit surface 32. The light source 1 is placed opposite to the light incident surface 31 of the light guide plate 3 by β. The light source cover 20 covers the light source 1A and is fixed to the light guide plate 30 by a double-sided tape 4''. 'Please refer to the third figure together, which is the schematic diagram of the structure of the light source in the first figure. The light source ίο includes a plurality of light emitting diodes u and a light bar 12 (LightBar) 12. The light-emitting diode 11 is fixed to the light source rod 2. The light-emitting diode u usually has a light-emitting angle of about 120 degrees. In use, the light incident surface 31 of the light guide plate 30 is usually placed within the range of the light emitting angle of the light emitting diode 11, so that as much light as possible enters the guide directly.

Claims (1)

1320122 X. Patent application scope: 1. A backlight module, comprising: a light guide plate comprising a light incident surface; a light source disposed opposite to the light incident surface, the light source comprising a plurality of light emitting diodes and a light source rod The light-emitting diode is fixed to the light source rod; a light source cover disposed opposite to the light-incident surface and covering the light source; a positioning device 'setting a difficult light_ between the wire cover, the light source and the light source cover Positioning connection, the positioning device includes: a positioning platform disposed on the glare and a positioning hole for setting the light rotation or the positioning device includes: a boss disposed on the light source bar and a fixed cover disposed on the light source cover, The positioning hole is for receiving the boss. 2. If the patent application is in the form of a triangle or a circle. The backlight module of the present invention, wherein the boss is rectangular and has a mouth. 4. The first tape of the patent application is fixed to the light guide plate. The backlight module of the item, wherein the light source cover passes through the double-sided tape 12 and the replacement page is corrected one day. 1*320122 XI, Fig. 13