CN202995193U

CN202995193U - LCD (liquid crystal display) flat panel display with LED (light-emitting diode) backlight

Info

Publication number: CN202995193U
Application number: CN 201220711718
Authority: CN
Inventors: 李�瑞; 邰亚强; 赵红娜
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-12-20
Filing date: 2012-12-20
Publication date: 2013-06-12
Anticipated expiration: 2022-12-20

Abstract

The utility model relates to an LCD (liquid crystal display) flat panel display with an LED (light-emitting diode) backlight. The LCD flat panel display comprises a display panel, a blue LED chip array, an aluminum-alloy frame and a blue LED chip array control panel. The display panel is composed of a polaroid, a color filter, a liquid crystal display unit, a thin film transistor, another polaroid, a YAG (yttrium aluminum garnet) phosphor coating and a diffusing panel from outward to inward. The aluminum-alloy frame passes through the blue LED chip array and the blue LED chip array control panel. By the aid of the LCD flat panel display with the LED backlight, service life of blue LED chips can be effectively prolonged, stability of blue LED chips can be effectively improved, and space utilization of the LCD flat panel display is further improved, numbers of the blue LED chips in same area are reduced so that producing cost and using cost are saved.

Description

A kind of LCD flat panel display that uses the LED-backlit source

Technical field

The utility model relates to a kind of LCD flat panel display that uses the LED-backlit source.

Background technology

In recent years, novel flat-plate shows that a hundred flowers blossom, and is especially powerful with the LCD growth momentum.Because liquid crystal itself is not luminous, backlight just becomes the indispensable critical component of liquid crystal display device.The backlight that existing LCD flat panel display adopts has a variety of, wherein take cold-cathode lamp, electroluminescence panel, these three kinds of luminescent devices of White-light LED illumination device as main.

Cold-cathode lamp (Cold Cathode Fluorescent Lamp, CCFL) backlight with technology maturation, diameter is little, cost is low, the life-span is long advantage.The CCFL luminescent core is that mercury is sent ultraviolet light by the sputter electron excitation, and the ultraviolet excitation three primary colors fluorescent powder sends white light.Contain mercury in the CCFL luminescent device, preparation process and superseded discarded meeting cause broken ring the greatly to environment.Along with the management and control of country to rare earth resources in recent years, the price advantage of CCFL lacks gradually.

Electroluminescence panel (FED) is as LCD flat panel display backlight source, have lightweight, response is fast, wide, the shockproof characteristics in visual angle.Yet its luminescence efficiency is low.Shorter and easy deliquescence of the life-span of the fluorescent powder sulfide system fluorescent powder that adopt more.Particularly under condition of work, easily decompose and produce S, the Poisoning cathode needle point, and then affect luminescence efficiency and the life-span of luminescent panel, be more than the critical defect of electroluminescence panel.

The White-light LED illumination device has energy-saving and environmental protection, response is fast, shock resistance is good, the characteristics of life-span length.Yet owing to yellow YAG fluorescent powder being applied the thickness on blue chip surface, due to narrow space, be difficult to apply evenly, be difficult to the colour temperature and the luminescence efficiency that reach identical between chip; And the fluorescent powder chip directly contacts, can cause chip temperature too high, in order to improve its thermal diffusivity, certainly will increase the radiating elements such as aluminium alloy post, heat dispersion is bad certainly will affect the normal service life of electronic devices and components on every side, thereby has reduced the long characteristics of life-span of WLED.

Therefore, in order to solve above technical matters, design a kind of LCD flat panel display that uses the LED-backlit source, this display is by disconnected from each other with blue-light LED chip and YAG fluorescent coating, produce the LCD flat panel display, can effectively improve serviceable life and the stability of blue-light LED chip.Improve the space availability ratio of LCD flat panel display, reduced the quantity of blue-light LED chip in equal area, thereby reduced production cost and use cost.

The utility model content

in order to overcome the defective that exists in background technology, the technical scheme that its technical matters that solves the utility model adopts is: a kind of LCD flat panel display that uses the LED-backlit source, comprise display board, the blue-light LED chip matrix, aluminum alloy frame and blue-light LED chip matrix control panel, described display board is followed successively by polaroid from outside to inside, colored filter, liquid crystal display, thin film transistor (TFT), polaroid, YAG fluorescent coating and diffusing panel, there is aluminum alloy frame to pass through between described blue-light LED chip matrix and blue-light LED chip matrix control panel, described blue-light LED chip matrix is the 0.3-0.9 millimeter to the distance between diffusing panel, in described YAG fluorescent coating, the medium particle diameter of YAG fluorescent powder is 0.5-2 μ m.

A kind of LCD flat panel display that uses the LED-backlit source that the utility model is related, this display is by disconnected from each other with blue-light LED chip and YAG fluorescent coating, produce the LCD flat panel display, can effectively improve serviceable life and the stability of blue-light LED chip.Improve the space availability ratio of LCD flat panel display, reduced the quantity of blue-light LED chip in equal area, thereby reduced production cost and use cost.

Description of drawings

Below in conjunction with drawings and Examples, the utility model is further illustrated.

Fig. 1 is a kind of inner structure schematic diagram that uses the LCD flat panel display in LED-backlit source of the utility model;

Wherein: 1, polaroid; 2, colored filter; 3, liquid crystal display; 4, thin film transistor (TFT); 5, YAG fluorescent coating; 6, diffusing panel; 7, blue-light LED chip matrix; 8, blue-light LED chip matrix control panel; 9, display board; 10, aluminum alloy frame.

Embodiment

By reference to the accompanying drawings the utility model is described in further detail now.The schematic diagram of accompanying drawing for simplifying basic structure of the present utility model only is described in a schematic way, so it only shows the formation relevant with the utility model.

see also Fig. 1, a kind of LCD flat panel display that uses the LED-backlit source, comprise display board 9, blue-light LED chip matrix 7, aluminum alloy frame 10 and blue-light LED chip matrix control panel 8, described display board is followed successively by polaroid 1 from outside to inside, colored filter 2, liquid crystal display 3, thin film transistor (TFT) 4, polaroid 1, YAG fluorescent coating 5 and diffusing panel 6, there is aluminum alloy frame 10 to pass through between described blue-light LED chip matrix 7 and blue-light LED chip matrix control panel 8, described blue-light LED chip matrix is 0.5 millimeter to the distance between diffusing panel, in described YAG fluorescent coating 5, the medium particle diameter of YAG fluorescent powder is 2 μ m.Described YAG fluorescent coating 5 is after evenly being mixed at 1: 6 according to mass ratio with organic silica gel by YAG fluorescent powder, to be coated on the transparent polaroid 1 at the liquid crystal panel back side, and the particle diameter of YAG fluorescent powder is 2 μ m, and the use amount of YAG fluorescent powder is 0.005g/cm2; By ultraviolet curing on polaroid 1.

Above-mentioned instantiation is used for illustrating its special effect of the utility model, for the personage who is familiar with this type of technology, according to the above description, may make the part change and revise this instantiation, its essence does not break away from the spiritual category person of utility model, all should be included in the application utility model patent scope of this case.

Claims

1. LCD flat panel display that uses the LED-backlit source, comprise display board (9), blue-light LED chip matrix (7), aluminum alloy frame (10) and blue-light LED chip matrix control panel (8), it is characterized in that: described display board is followed successively by polaroid (1) from outside to inside, colored filter (2), liquid crystal display (3), thin film transistor (TFT) (4), polaroid (1), YAG fluorescent coating (5) and diffusing panel (6), there is aluminum alloy frame (10) to pass through between described blue-light LED chip matrix (7) and blue-light LED chip matrix control panel (8).

2. a kind of LCD flat panel display that uses the LED-backlit source according to claim 1, it is characterized in that: described blue-light LED chip matrix (7) is the 0.3-0.9 millimeter to the distance between diffusing panel (6).

3. a kind of LCD flat panel display that uses the LED-backlit source according to claim 1 is characterized in that: in described YAG fluorescent coating (5), the medium particle diameter of YAG fluorescent powder is 0.5-2 μ m.