Background and purpose
2 side-in LED backlight

2.0 The traditional side-in LED backlight
2.1 LED packaging and improve the coupling efficiency between the light guide plate
2.2 for large-size TVs with V-groove light guide plate
2.3. No light guide edge type LED backlight

3 Direct type LED Backlight

3.0 The traditional direct type LED backlight
3.1 The thin mirror with a direct type LED backlight
3.2 Thin with a network of direct type LED backlight
3.3 with a thin reflective structure of direct type LED backlight

4 side and straight down into the hybrid LED backlight

4.1 The bottom of the formation of reflective light guide plate array side down cone and straight down into the hybrid LED backlight
4.2 The light guide plate at the bottom of the formation of inverted V-groove array side and straight down into the hybrid LED backlight
4.3 light guide groove formed on the top side of the array and straight down into the hybrid LED backlight

1. Background and purpose

LED backlight market share rapidly. Currently, LED backlight technology is developing, LED backlight module structure is developing.

According to the billion light sources, Samsung intends to further the direct type LED-backlit LCD TV do continue down the thickness of thin, of course, also need to overcome many technical difficulties, the other, combined with edge-lit LED backlight and direct type LED backlight technology also have the opportunity launch (edge-lit LED-backlit LCD TV sells ultra-thin design is motivation).

Hisense believes that the first is the direct type occupy the high-end LED, and LED low-side-occupied; then gradually replace the side-CCFL backlight, while the direct type and gradually replaced the side-in ("The 4th China International New Light & new Energy Lighting Forum ").

Japan Techno System Research of the Hsiu-mediated in the "TSR 7th Symposium 2010", the introduction of the rapid growth of LED-backlit LCD TV to the next trend (the trend of LED-backlit LCD TV to the next trend). According to reports, many panel makers plan to reduce the light guide plate rather than unilateral equipped with LED, to reduce costs. Epicentral way to reduce the number of LED's use of general use lens cap (Lens Cap). Improved through the lens cover, the thickness of the backlight unit can be "thinned to 1.5cm".

Therefore, research and development are the following aspects:

First, the existing side-in backlight module to improve it.
Second, the existing direct type backlight module to improve it.
Third, the design and development of both a direct type backlight module and the side-benefits without major shortcomings of the two major new backlight module. Side-in backlight module is the main disadvantage of direct type backlight module of the main advantages of direct type backlight module of the main shortcomings of edge type backlight module is a major advantage. Both are highly complementary.

"China Electronics News," an important component of the backlight module, such as light guide, diffuser, reflector, light source patent statistics were carried out. As of March 31, 2009, TFT-LCD backlight module technology patent applications in China a total of 2381. Among them, the number of invention patent applications 1885, the number of patent applications for utility model 466.