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Backlight module
Introduction backlight modules:
Backlight module (Back light module) for the liquid crystal display panel (LCD panel), one of the key components, as the LCD itself is not luminescent, backlight module that is the function of the Parade is an adequate supply of degree and distribution of the light source, so that it can display images. LCD panels are now widely used in monitors, notebook computers, digital cameras and a projector, such as the growth potential of electronic products, the backlight module and its associated drive components of demand growth, low in the Panel price of the irritant, the used notebook computers and LCD monitors and other large-size panel demand by the largest growth in demand for the backlight module of the main sources of dynamic power as well as backlighting for the LCD panel module key to the second largest components. Backlight module for LCD panels second-largest key components.
Backlight module categories:
In general, the backlight module can be divided into pre-light-type (Front light) and backlit (Back light) two species, while the backlit scale may request to do so at the location of lamp types, the development of the following three structures:
(1)side light type (Edge lighting) Structure: The hair on the side of light source for the single light source, light guide plates without printing mining injection molding design, commonly used in small and medium-size 18-inch below the backlight module, the side the incident light source design, with light volume, thin, narrow box, and low power characteristics, but also mobile phones, personal digital assistant (PDA), laptop light source, are also used large-size backlight module side light structure.
(2) down-type (Bottom lighting) structure: large-sized backlight module structure has not the weight, power consumption and Leung holds a degree, so not including the light source and lightguide plate is placed in the bottom of the down-type structure has been developed facilitate future. Spontaneous light from the light source (eg lamp, light-emitting diodes, etc.) injection after reflection by reflective panels, up evenly dispersed through the proliferation of boards, after a positive injection, placement of space due to large, tube-based TFT panel size 2 up to use the lamp, but it also has increased module thickness, weight, power flow, and its advantages for high-hui degree, good light angle, light use of high efficiency, simple structure, such as transaction and therefore suitable for portability and space requirements than not picky with the LCD monitor of the LCD TV, its high power consumption (the use of cold cathode), uniformity of LCD is not good and cause fever and other issues still need to improve.
(3) hollow-type structure: With the increase in image size requirements, LCD also more large-size towards the direction of the development of this type of super-large LCD by using the future as a television monitor and Choi linked not only to large screen, high-volume and the Light Parade of degree, also in electrical power requirements of low heat effect, in recent years the development of the hollow structure of the backlight module, the use of hot-cathode tube as a source. This structure to the air as a medium for light transmission, light source has been down and sounding boar lens adjustment and reflection on the direction, the part of upward and exit through the light guide plates on the surface, the other part due to total reflection in the cavity re-enter until the degree by the folding light guide plate after reflection through the radio, and up into the light guide plate light or direct the radio, or a series of role-choler another reflection shot: shape of the light guide plate in wedge-shaped structure for the purpose of seeking the effect of homogenization.
The key backlight module introduced optical components:
Backlight module of LCD panels mainly to provide a uniform and high levels of light Leung, Department of Management will be the basic common point or linear light source, through the simple and effective optical body into a high and uniform degree-fai Leung degree of surface light source products . The use of the general structure of the linear cold cathode light sources into the light guide plate cover by reflex, into linear light source into a uniform distribution of surface light source, then the proliferation of films are optical lenses role and the role of set-ray light source to enhance the degree of Parade and are homogeneous degree. In this we backlight module to do a few basic components introduced.
Backlight modules:
the fat source (Light source), Light Guide Plate (light guide plate), plastic box (housing), reflective films (Reflector), the proliferation of film (Diffuser), Brightness Enhancement Film (BEF, prism film), black-and-white plastic (Curtain Tape) and so on. Backlighting thin as a result of growing demand, there is some need to iron box.
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