CN201787425U - LCD backlight module with integrated display housing - Google Patents
LCD backlight module with integrated display housing Download PDFInfo
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- CN201787425U CN201787425U CN2010202474620U CN201020247462U CN201787425U CN 201787425 U CN201787425 U CN 201787425U CN 2010202474620 U CN2010202474620 U CN 2010202474620U CN 201020247462 U CN201020247462 U CN 201020247462U CN 201787425 U CN201787425 U CN 201787425U
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Abstract
The utility model provides an LCD backlight module with an integrated display housing, which comprises an LED light source, a free surface reflector, the integrated display housing, a backlighting cavity, a diffuser film, a brightness enhancement film, and a light source support frame. The LCD backlight module is characterized in that the display housing and the free surface reflector are integrated into an integral component; the diffuser film, the brightness enhancement film and an LCD panel module are arranged in front of the backlighting cavity; a free surface reflecting surface is formed on the back of the backlighting cavity; the LED light source is positioned behind the LCD panel module; the emergent LED light is reflected to the LCD panel module through the free surface reflecting surface; the direction of reflection of LED light is accurately controlled by the reflecting surface; the LED is mounted on the light source support frame; and the light source support frame is connected with the inner wall of the backlighting cavity. The LCD backlight module with the integrated display housing has the advantages of thin backlight module system, high light energy utilization ratio, and lower manufacturing cost due to the integration of the display housing and the backlight module.
Description
Technical field
The utility model relates to a kind of LCD, particularly a kind of LCD module backlight that is provided with free-form surface reflector, integrated display shell.
Background technology
In recent years, the market of flat-panel monitor is along with the development of consumption electronic product is increasing, and wherein, (Liquid Crystal Display LCD) accounts for the share of FPD near 90% to LCD.LCD is as a kind of passive luminescent device, and itself can be not luminous, for transmission type lcd device, must rely on back light that light is passed display floater, represents graph image.Cold-cathode tube (ColdCathode Fluorescent Lamp, CCFL) and light emitting diode (Light Emitting Diodes LED) is two kinds of major techniques of present LCD backlight.The main advantage of LED-backlit is: color reducibility is good, low energy consumption, extra long life, response speed fast, better electricity optics control performance, material do not have environment public hazards, integral product more frivolous, do not contain fragile part or the like.In the long run, the white light LEDs of high-color rendering or RGB three-primary color LED are backlight is the most promising in the LCD backlight technology.LED-backlit is divided into two kinds of Edge Lighting (side following formula) and DirectLighting (straight-down negative) according to its optical texture.The light source arrangement of side following formula is evenly distributed to light on the panel by LightGuide Plate (LGP) in LCD panel side, and the light source of straight-down negative directly is arranged in the liquid crystal panel below, does not need LGP.In general, side light type LED backlight integral thickness is thinner, is applicable to the small-medium size display; Direct-light type LED backlight light uniformity height is not restricted by display sizes, is easy to realize dynamic area contrast control.
In the side light type LED backlight, the light of LED outgoing is coupled in the process of LGP, and the light energy loss can take place, LGP with the turn light rays of horizontal direction incident in the process of LCD panel direction, also there is energy loss, coupling efficiency and leaded light efficient have restricted the whole light efficiency of side type backlight jointly, in general, the whole light efficiency of actual side down type backlight system is not higher than 75%, has limited the performance of LED-backlit power savings advantages; And the leaded light area of LGP has certain limitation at present, and the leaded light area of monolithic LGP is generally less than 30 inches diagonal, and the oversize display will use the polylith LGP, has increased the difficulty of optical design and the complexity of system.
In direct-light type LED backlight, a kind of technical scheme has been used side-emitting led (Side Emitter LED) as described in U.S. Pat 6607286 and the US6679621, and the light energy of LED outgoing concentrates in the scope of horizontal direction ± 20 °.This based on side-emitting led back light system in, the inwall of backlight cavities is coated with highly reflective material, the light that LED sends interreflection in backlight cavities finally forms uniform light energy distribution at the panel place.Though this backing structure uniformity height, light has lost a lot of energy in the process of interreflection, and whole light efficiency is on the low side.Another kind of technical scheme is with LED distributed arranging below panel, because going out the space angle distribution of light energy, LED generally concentrates on axis direction, LED need with the LCD panel at a distance of certain distance, could guarantee that target face illumination is even, in general, the thickness of distribution type LED direct-type backlight is greater than the side light type LED backlight.
In order to reduce the thickness of distribution type LED direct-type backlight, a kind of technical scheme is the density of arranging that increases the distributed LED of arranging, can reduce system's thickness to a certain extent, but this technical scheme can cause the number of LED sharply to increase, 22 cun panels use the number of LED to surpass 1000, can bring a series of problems such as light source uniformity, reliability, power drives; Another kind method is to use secondary lens to increase the LED rising angle, can reduce system's thickness equally, the existing at present free-form surface lens through the precision optics design is applied among the LED-backlit, as described in Chinese invention patent 200910041731.X, but when being to use secondary lens to change the beam projecting direction, because the existence of total internal reflection, the beam projecting angle can not increase too much, then the degree that reduces of back light system thickness is also limited, compares the side type backlight and also has certain gap.
In addition, in the present direct-type backlight, module backlight and display casing are independently made and then are assembled into complete display with LCD panel module, driving power etc.The assembly that module backlight is relevant with the display casing conduct there is no conflict on the function, if the integrated manufacturing of energy can reduce production process, reduce cost.
Summary of the invention
The purpose of this utility model is at the defective that exists in the prior art, and a kind of LCD module backlight that is provided with free-form surface reflector, integrated display shell is provided.In order to overcome the big shortcoming of the whole light efficiency direct-light type LED backlight thickness on the low side and distributed of side light type LED backlight, simultaneously that module backlight and display is mutually integrated to reduce cost, the present invention proposes a kind of free-form surface reflector and integrated LED-backlit module scheme of display casing used, LED is inverted in backlight cavities, the free form surface reflecting surface control target face uniformity.Light only passes through primary event in this scheme, whole light efficiency height, and, can improve the rising angle of LED greatly by reflecting the control light angle not like the problem that has total internal reflection in the transmission-type, the thickness of whole back light system has been reduced to gratifying degree.In addition, integrated manufacturing also can bring the reduction of production cost.
The utility model comprises: led light source, free-form surface reflector, integrated display casing, backlight cavities, diffusion barrier, brightness enhancement film, the light source bracing frame, it is characterized in that display casing and free-form surface reflector are integrated into a global facility, its outside formation display casing, its inwall constitutes a backlight cavities, the place ahead of backlight cavities is an Open architecture, be used to install diffusion barrier, brightness enhancement film and LCD LCD panel module, the backlight cavities bottom is the free form surface reflecting surface of free-form surface reflector, led light source is positioned at backlight cavities, be positioned at the rear of LCD panel module, the place ahead of free form surface reflecting surface, the beam projecting direction of LED deviates from mutually with the LCD panel, the free form surface reflecting surface is relative with the LCD panel, reflecting surface is accurately controlled the reflection direction of LED light, most of light of LED outgoing is reflexed on the LCD panel module, LED is installed on the light source bracing frame, and the light source bracing frame is connected with the backlight cavities inwall.
The utility model has the advantages that module system thin thickness backlight, the integrated of efficiency of light energy utilization height, display casing and module backlight reduces production costs.
Description of drawings
The structural representation of Fig. 1 single piece of metal bar of the present utility model light source bracing frame;
The plan structure schematic diagram of Fig. 2 single piece of metal bar of the present utility model light source bracing frame;
The structural representation of Fig. 3 single piece of metal bar light source bracing frame;
The partial structurtes schematic diagram of Fig. 4 single piece of metal bar light source bracing frame;
The plan structure schematic diagram of Fig. 5 double joint bonding jumper of the present utility model light source bracing frame;
The structural representation of Fig. 6 double joint bonding jumper light source bracing frame;
The partial structurtes schematic diagram of Fig. 7 double joint bonding jumper light source bracing frame;
The plan structure schematic diagram of Fig. 8 three-primary color LED.
Among the figure: coupling assembling, 4 driving powers and other parts, 5 diffusion barriers, 61 brightness enhancement film, the 62 dual brightness enhancement films of 1a white light LEDs, 1r red-light LED, 1g green light LED, 1b blue-ray LED, 2 free-form surface reflectors, 21 free form surface reflectings surface, 3a single piece of metal bar light source bracing frame, 3b double joint bonding jumper light source bracing frame, 31 light source bracing frames and backlight cavities.
The specific embodiment
Embodiment one
Further specify embodiment of the present utility model below in conjunction with accompanying drawing:
Referring to Fig. 1, Fig. 2, present embodiment is by white light LEDs 1a, the integrated free-form surface reflector 2 of display casing, light source bracing frame 3a, and driving power and other parts 4 and diffusion barrier 5, brightness enhancement film 61 and dual brightness enhancement film 62 are formed.
Led light source in the present embodiment is made of 10-5000 white light LEDs.Display casing and free-form surface reflector are integrated into a global facility, the inwall plating of the free-form surface reflector of being made by aluminium 2 is with highly reflective material, its inwall constitutes a backlight cavities, the place ahead of backlight cavities is an Open architecture, be used to install diffusion barrier 5, brightness enhancement film 61, dual brightness enhancement film 62 and LCD panel module, the backlight cavities bottom is the free form surface reflecting surface 21 of free-form surface reflector, the reflectivity of the free form surface reflecting surface 21 of free-form surface reflector 2 is made into greater than 70%, free-form surface reflector 2 uses aluminium, ABS plastic is by injection moulding, punching press, the precision optical machinery processing method is made, and the outside of free-form surface reflector 2 has constituted the shell of display.White light LEDs 1a is positioned at backlight cavities, be positioned at the rear of LCD panel module, the place ahead of free form surface reflecting surface 21, the beam projecting direction of LED 1a deviates from mutually with the LCD panel, free form surface reflecting surface 21 is relative with the LCD panel, free form surface reflecting surface 21 is the reflection direction of control white light LEDs 1a light accurately, most of light of LED outgoing is reflexed on the LCD panel module, white light LEDs 1a is fixed on the light source bracing frame 3a, the concrete form of light source bracing frame 3a is the single piece of metal bar, be connected to by syndeton 31 on the inwall of free-form surface reflector 2, referring to Fig. 3, referring to Fig. 4.Form uniform illumination at the top of backlight cavities and distribute, final, the diffusion barrier 5 at backlight cavities top, brightness enhancement film 61, dual brightness enhancement film 62, and LCD panel module is converted into required Luminance Distribution with the uniform illumination distribution.
Embodiment two
Embodiment two is identical with embodiment one, and the concrete form of different is light source bracing frame 3b is the double joint bonding jumper, and white light LEDs 1a is fixed on the light source bracing frame 3b simultaneously, promptly on the double joint bonding jumper.Light source bracing frame 3b is connected to by syndeton 31 on the inwall of free-form surface reflector 2, referring to Fig. 5, Fig. 6, Fig. 7.In addition, different is integrated free-form surface reflector 2 is made by ABS plastic, and its inwall plating is with highly reflective material, and embodiment two compares with embodiment one, the weight saving of its module backlight.
Embodiment three
Embodiment three is identical with embodiment one, different is that led light source is three primary colours (RGB) LED, white light LEDs back light unit among the embodiment one is by a red LED 1r, a blue led 1b, totally four LEDs are alternative for two green LED 1g, and these LED are fixed on the light source bracing frame 3a, and the concrete form of light source bracing frame 3a is the single piece of metal bar, be connected to by syndeton 31 on the inwall of free-form surface reflector 2, referring to Fig. 8.
Claims (5)
1. LCD module backlight that is provided with the integrated display shell, comprise: led light source, free-form surface reflector, integrated display casing, backlight cavities, diffusion barrier, brightness enhancement film, the light source bracing frame, it is characterized in that display casing and free-form surface reflector are integrated into a global facility, its outside formation display casing, its inwall constitutes a backlight cavities, the place ahead of backlight cavities is an Open architecture, be used to install diffusion barrier, brightness enhancement film and LCD LCD panel module, the back of backlight cavities is the free form surface reflecting surface of free-form surface reflector, led light source is positioned at backlight cavities, be positioned at the rear of LCD panel module, the place ahead of free form surface reflecting surface, the beam projecting direction of LED deviates from mutually with the LCD panel, the free form surface reflecting surface is relative with the LCD panel, the reflection direction of reflecting surface control LED light, most of light of LED outgoing reflexes on the LCD panel module, and LED is installed on the light source bracing frame, and the light source bracing frame is connected with the backlight cavities inwall.
2. a kind of LCD module backlight that is provided with the integrated display shell according to claim 1 is characterized in that described led light source is white light LEDs or RGB three-primary color LED.
3. a kind of LCD module backlight that is provided with the integrated display shell according to claim 1, the reflectivity of each face of inwall that it is characterized in that described free-form surface reflector is greater than 70%.
4. a kind of LCD module backlight that is provided with the integrated display shell according to claim 1 is characterized in that described light source bracing frame is the single piece of metal bar, and every LEDs is fixed on the single piece of metal bar.
5. a kind of LCD module backlight that is provided with the integrated display shell according to claim 1 is characterized in that described light source bracing frame is the double joint bonding jumper, and each LEDs is fixed on the double joint bonding jumper simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202474620U CN201787425U (en) | 2010-07-02 | 2010-07-02 | LCD backlight module with integrated display housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202474620U CN201787425U (en) | 2010-07-02 | 2010-07-02 | LCD backlight module with integrated display housing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201787425U true CN201787425U (en) | 2011-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202474620U Expired - Lifetime CN201787425U (en) | 2010-07-02 | 2010-07-02 | LCD backlight module with integrated display housing |
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| Country | Link |
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| CN (1) | CN201787425U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234175A (en) * | 2013-04-02 | 2013-08-07 | 合肥宝龙达光电技术有限公司 | Method for installing LED in backlight module and LED jointing structure |
| WO2013149405A1 (en) * | 2012-04-05 | 2013-10-10 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN111308783A (en) * | 2020-03-25 | 2020-06-19 | 深圳市隆利科技股份有限公司 | LED backlight device and display equipment |
-
2010
- 2010-07-02 CN CN2010202474620U patent/CN201787425U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013149405A1 (en) * | 2012-04-05 | 2013-10-10 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN103234175A (en) * | 2013-04-02 | 2013-08-07 | 合肥宝龙达光电技术有限公司 | Method for installing LED in backlight module and LED jointing structure |
| CN111308783A (en) * | 2020-03-25 | 2020-06-19 | 深圳市隆利科技股份有限公司 | LED backlight device and display equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110406 |
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| CX01 | Expiry of patent term |