LCD unit and thin type backlight module thereof

Abstract

It is a LCD unit and its thin aphototropism module. The LCD unit comprises an aphototropism module and a LCD panel, wherein; the LCD panel is located on the aphototropism module, which comprises a frame, a light conductive plate and a prism slice. The frame is used to contain the LCD panel and light conductive plate with first extruding part on it and by forming the first extruding part, it form s gap .The prism slice is located between the LCD panel and light conductive plate and has second extruding part by locating which to fix the prism slice on the light plate.

Description

technical field [0001] The invention relates to a liquid crystal display unit and its backlight module, in particular to a liquid crystal display unit with a thin backlight module. Background technique [0002] In the liquid crystal display unit of a general liquid crystal display, a backlight module is used as a light source, and in the backlight module, a prism sheet and a pattern design of a light guide plate are often used to achieve desired optical properties. [0003] As shown in FIG. 1a, components in a known backlight module are assembled vertically on each optical film, or glued in the gaps between components to form spacers and then stacked. [0004] Specifically, in the frame 11 of the known liquid crystal display unit 10, a reflective sheet 12, a light guide plate 13, a diffusion sheet 14, a prism sheet 15, and a liquid crystal panel 16 are sequentially arranged from bottom to top, and the flexible panel connected to the liquid crystal panel 16 The circuit board...

AI Technical Summary

Problems solved by technology

[0006] 1. Restrict the design of the geometric shape of the backlight module: limited by the current attainable manufacturing technology of the prism sheet (thickness, enhancement effect), the design of the thickness of the entire backlight module cannot meet the customer's requirements, and it is likely to lose the order;

[0007] 2. The positioning method of the prism sheet is not easy: as shown in Figure 1b, in the known backlight module, the prism sheet 15 will grow positioning wings 151 on the left and right sides (only one is shown in Figure 1b), so that the operator can process and positioning / fixing the prism sheet 15, but this design may cause the prism sheet 15 to be in the same row on the light incident side and the light exit side due to the deformation / rotation of the prism sheet 15 in the z direction (that is, the direction perpendicular to the paper surface) The luminance of three points (nine-point luminance measurement) causes large variations, or worse, dark / bright bands;

[0008] 3. Design reverse work problem: use double-sided tape as the spacer between components. In addition to the reverse work problem when the good rate is not good, you must also consider the light absorption and scattering effects of the double-sided tape itself. Optical properties are unstable;

[0009] 4. Product reliability: The positioning wings on both sides of the known design of the prism sheet are fixed, and in the case of asymmetrical positions, after the high-low temperature cycle test, it is easy to cause the backlight module point due to thermal stress / residual stress. When it is bright, the streak phenomenon occurs on it;

[0010] 5. Backlight module assembly: Due to the existence of positioning wings on both sides, it is extremely difficult to design automatic / semi-automatic assembly;

[0011] 6. Since the flexible circuit board 17 is provided with a plurality of electronic components 171, components with a higher height often increase the overall thickness of the liquid crystal display unit

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