CN201787427U - LCD backlight module integrating function of display housing and intelligent control - Google Patents
LCD backlight module integrating function of display housing and intelligent control Download PDFInfo
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- CN201787427U CN201787427U CN201020247464XU CN201020247464U CN201787427U CN 201787427 U CN201787427 U CN 201787427U CN 201020247464X U CN201020247464X U CN 201020247464XU CN 201020247464 U CN201020247464 U CN 201020247464U CN 201787427 U CN201787427 U CN 201787427U
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Abstract
The utility model discloses an LCD backlight module integrating the function of a display housing and intelligent control. The LCD backlight module comprises a light source, a free-form surface reflector, an integrated display housing, a diffusion film, a brightness enhancement film, a two-layer brightness enhancement film, a backlight cavity, a light source carriage, a drive power supply and an intelligent control circuit. The LCD backlight module is characterized in that the light source adopts a cold-cathode tube or a light-emitting diode (LED); the outer part of the free-form surface reflector constitutes the display housing; the inner wall of the free-form surface reflector constitutes the backlight cavity; the diffusion film, the brightness enhancement film and an LCD panel module are arranged at the top of the backlight cavity in turn; the light source is arranged on the free-form surface reflector; and an optical board is arranged on the light source. The LCD backlight module integrates the functions of an optical system and the display housing, heat dissipation, the drive of the power supply and intelligent control into a whole, adopts the free-form surface reflector to accurately control the reflecting direction of light, reduces the thickness while realizing the uniform illumination, and decreases the machining operations and the manufacturing cost.
Description
Technical field
The utility model relates to LCD,, the LCD module backlight of particularly a kind of integrated display shell and Based Intelligent Control.
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.Module backlight is as the significant components in the LCD, generally only comprise optical system, during the actual production display, also to be assembled into complete display with LCD panel module and display casing again for design of backlight module and additional cooling system, driving power and the intelligence control system of assembling.Therefore, traditional module backlight can not be directly and the panel module assemble, this can increase production process, brings the rising of cost.
Aspect optical system, LCD is backlight to be divided into two kinds of Edge Lighting (side following formula) and Direct Lighting (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 Light Guide 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.No matter be side following formula or direct-type backlight, all need optical thin films such as diffusion barrier, brightness enhancement film that uniform illumination is converted into and be suitable for the Luminance Distribution that spectators watch.In general, side down type LCD integral thickness backlight is thinner, is applicable to the small-medium size display; The directly-down type LCD light uniformity backlight height is not restricted by display sizes, is easy to realize dynamic area contrast control.
In the side down type LCD is backlight, the light of light source 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%, is unfavorable for realizing energy-efficient display; 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.This backing structure uniformity is higher, but light has lost a lot of energy in the process of interreflection, and whole light efficiency is on the low side, and integral thickness is also bigger than normal.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 the LCD module backlight of a kind of integrated display shell and Based Intelligent Control is provided.The utility model comprises: light source, free-form surface reflector, integrated display casing, diffusion barrier, brightness enhancement film, the dual brightness enhancement film, backlight cavities, the light source bracing frame, driving power, intelligence control circuit, it is characterized in that described light source is cold-cathode tube (CCFL) or light emitting diode (LED), the outside of free-form surface reflector is a display casing, its inwall is a backlight cavities, the backlight cavities top is an open architecture, be used to lay diffusion barrier, brightness enhancement film and LCD panel module, the backlight cavities bottom is the free form surface reflecting surface of free-form surface reflector, the backlight cavities sidewall is all reflecting surface, light source is installed on the free form surface reflecting surface of backlight cavities bottom, light direction is relative with the LCD panel, be provided with the optical sheet of a translucent semi reflective on the light source, display casing is provided with radiating fin or installs radiator fan device additional, and driving power and intelligence control circuit are installed among the module backlight.
Advantage of the present invention has been integrated optics, heat radiation, display casing, power drives and Based Intelligent Control function, used the free form surface reflecting surface accurately to control the light reflection direction, realizing evenly having reduced thickness in the illumination, manufacturing procedure is few, low cost of manufacture.
Description of drawings
The sectional structure schematic diagram of Fig. 1 embodiment of the invention one;
The sectional structure schematic diagram of Fig. 2 embodiment of the invention two;
The sectional structure schematic diagram of Fig. 3 embodiment of the invention three;
The sectional structure schematic diagram of Fig. 4 embodiment of the invention four;
The sectional structure schematic diagram of Fig. 5 embodiment of the invention five;
The theory diagram of Fig. 6 intelligence control system of the present invention.
Among the figure: the 1a led light source, 1b CCFL light source, 2a metal base printed circuit plate, 2b is used for the high thermal conductivity materials that the CCFL light source is connected with free-form surface reflector, 3 free-form surface reflectors, 31 free form surface reflectings surface, 32 backlight cavities sidewalls, 4 driving powers, 5 intelligence control circuits, 51 wireless communication modules, the integrated component of 45 driving powers and intelligence control circuit, 61 colourities, luminance sensor, 62 electric sensors, the optical sheet of 7 translucent semi reflectives, 8 radiating fins, 9 diffusion barriers, 101 brightness enhancement film, 102 dual brightness enhancement films.
The specific embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing.
Embodiment one
Referring to Fig. 1, present embodiment is a kind of integrated LCD module backlight of optics, heat radiation, display casing, driving power and Based Intelligent Control function, light source adopts LED 1a, led light source 1a is positioned at the bottom of free-form surface reflector 3, be installed on the axis of free form surface reflecting surface 31, light direction is relative with the LCD panel, and led light source is linear arranges, and led light source is connected with free-form surface reflector 3 by the metal base printed circuit plate 2a of high thermal conductivity.
The outside of free-form surface reflector 3 constitutes display casing simultaneously, inwall forms a backlight cavities, the backlight cavities top is an open architecture, be used to lay diffusion barrier 9, brightness enhancement film 101, dual brightness enhancement film 102 bloomings and LCD panel module, the backlight cavities bottom is the free form surface reflecting surface 31 of free-form surface reflector 3, backlight cavities sidewall 32 is all reflecting surface, free-form surface reflector 3 adopts ABS plastic, aluminium is through injection moulding, punching press, the precision optical machinery processing method is made, the reflecting surface 31 and the sidewall 32 of free-form surface reflector 3 inwalls all plate with highly reflective material, and reflectivity is greater than 70%.
White light LEDs constitutes a back light unit BLU, and each LED-backlit unit B LU also should be linear arranging; If adopt three primary colours (RGB) LED, three primary colours (RGB) LED, then a redness, a blueness, two greens totally four LEDs constitute a back light unit BLU, and its packing forms is the surface patch encapsulation, and the led light source that is installed on the free form surface reflecting surface is arranged in a linear.
Comprise an optical sheet 7 with translucent semi reflective in the backlight cavities, be positioned at directly over the light source, its transmissivity and reflectivity are selected as required, and profile is tabular usually, and present embodiment is a tabular, also can be profiles such as parabola, sphere.
The road of the irradiation of backlight cavities end face is: most of light of led light source outgoing directly arrives the optical sheet 7 of translucent semi reflective, all the other fractions directly arrive the backlight cavities top, arriving transmission in the light of optical sheet 7 of translucent semi reflective partly passes the optical sheet 7 of translucent semi reflective and arrives the backlight cavities tops, the reflecting part arrives the free form surface reflecting surface, the free form surface reflecting surface carries out secondary reflection to these light, finally also arrive the backlight cavities top, the uniform illumination that obtains the backlight cavities end face by its reflection direction of accurate control distributes.
Free-form surface reflector 3 other inwalls also reflex to the backlight cavities top with the light that small part does not have directly to arrive the backlight cavities top, to improve the efficiency of light energy utilization;
For in module backlight, realizing heat sinking function, the connector of light source and free form surface reflecting surface 31 adopts high thermal conductivity materials such as metal base printed circuit sheet material material to make, heat conducts to free-form surface reflector 3 from light source by connectors such as metal base printed circuit plates, free-form surface reflector 3 adopts high thermal conductivity materials to make, its outside and environmental communication, the outside of free-form surface reflector 3 constitutes display casing, radiation fin structure can be adopted in free-form surface reflector 3 outsides, be the cooling system of module backlight, also can install radiator fan device as required additional.
Reserve the position that driving power 4 is installed on the free-form surface reflector 3, driving power 4 is installed on the free-form surface reflector 3 as an integral device, and driving power 4 provides constant current driving or constant voltage to drive or exchange and drives, and output current or voltage are adjustable.
The optical sheet 7 of translucent semi reflective, the high reflectance inwall of backlight cavities are controlled the light trend jointly, forming uniform illumination at the backlight cavities end face distributes, the diffusion barrier 9 at backlight cavities top, brightness enhancement film 101, dual brightness enhancement film 102 optical films are converted into required Luminance Distribution with the uniform illumination distribution.
Embodiment two
Embodiment two is identical with embodiment one, and the sharp processing of different is free-form surface reflector 3 becomes the shape that the side is an arc, referring to Fig. 2.
Embodiment three
Embodiment three is identical with embodiment one, and the profile of different is free-form surface reflector 3 is that display casing is not provided with fin structure, and driving power 4 and intelligence control circuit 5 are integrated into a global facility 45, referring to Fig. 3.
Embodiment four
Embodiment four is identical with embodiment one, and different is to have increased wireless communication module 51, electric sensor 62, the edge that is installed in display casing of driving power 4 and intelligence control system 5, and display casing is not provided with fin structure, referring to Fig. 4.The system block diagram of intelligence control circuit 5 is referring to Fig. 6.
Embodiment five
Embodiment five is identical with embodiment one, different is that light source adopts CCFL light source 1b, CCFL light source 1b is connected with free-form surface reflector 3 by high thermal conductivity materials 2b, free-form surface reflector 3 has high thermal conductivity, its outside and environmental communication, under the situation that can satisfy radiating requirements, fin structure is not set.
The outside of free-form surface reflector 3 constitutes display casing simultaneously, inwall forms a backlight cavities, CCFL light source 1b is installed on the axis of free form surface reflecting surface 31, light direction is relative with the LCD panel, driving power 4 and intelligence control circuit 5 are integrated into a global facility 45, be installed in the edge of display casing, referring to Fig. 5.
Claims (6)
1. the LCD module backlight of integrated display shell and Based Intelligent Control, comprise: light source, free-form surface reflector, integrated display casing, diffusion barrier, brightness enhancement film, the dual brightness enhancement film, backlight cavities, the light source bracing frame, driving power, intelligence control circuit, it is characterized in that described light source is cold-cathode tube (CCFL) or light emitting diode (LED), the outside of free-form surface reflector is a display casing, its inwall is a backlight cavities, the backlight cavities top is an open architecture, be used to lay diffusion barrier, brightness enhancement film and LCD panel module, the backlight cavities bottom is the free form surface reflecting surface of free-form surface reflector, the backlight cavities sidewall is all reflecting surface, light source is installed on the free form surface reflecting surface of backlight cavities bottom, light direction is relative with the LCD panel, be provided with the optical sheet of a translucent semi reflective on the light source, display casing is provided with radiating fin or installs radiator fan device additional, and driving power and intelligence control circuit are installed among the module backlight.
2. the LCD module backlight of integrated display shell according to claim 1 and Based Intelligent Control, it is characterized in that described led light source is white light LEDs or RGB three-primary color LED, white light LEDs constitutes a back light unit (BLU), the RGB three-primary color LED is a redness, a blueness, two greens totally four LEDs constitute a back light unit (BLU), and its packing forms is the surface patch encapsulation, and the led light source that is installed on the free form surface reflecting surface is arranged in a linear.
3. the LCD module backlight of integrated display shell according to claim 1 and Based Intelligent Control, the reflectivity that it is characterized in that described free-form surface reflector is greater than 70%.
4. the LCD module backlight of integrated display shell according to claim 1 and Based Intelligent Control is characterized in that described driving power, intelligence control circuit are installed in the free-form surface reflector.
5. the LCD module backlight of integrated display shell according to claim 1 and Based Intelligent Control is characterized in that describedly being followed successively by diffusion barrier, brightness enhancement film, dual brightness enhancement film at the LCD back side of panel.
6. the LCD module backlight of integrated display shell according to claim 1 and Based Intelligent Control is characterized in that described intelligence control circuit is the combination of single-chip microcomputer or memory or RF tag or wireless communication module or chromaticity transducer, temperature sensor, luminance sensor, voltage sensor, current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020247464XU CN201787427U (en) | 2010-07-02 | 2010-07-02 | LCD backlight module integrating function of display housing and intelligent control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020247464XU CN201787427U (en) | 2010-07-02 | 2010-07-02 | LCD backlight module integrating function of display housing and intelligent control |
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| Publication Number | Publication Date |
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| CN201787427U true CN201787427U (en) | 2011-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201020247464XU Expired - Lifetime CN201787427U (en) | 2010-07-02 | 2010-07-02 | LCD backlight module integrating function of display housing and intelligent control |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313188A (en) * | 2010-07-02 | 2012-01-11 | 刘胜 | Integrated display shell and intelligently-controlled LCD (Liquid Crystal Display) backlight module |
| CN102563470A (en) * | 2012-02-21 | 2012-07-11 | 南京汇兴博业数字设备有限公司 | High-brightness temperature-adaptive direct-type cold cathode fluorescent lamp liquid crystal backlight module |
| CN104733587A (en) * | 2013-12-24 | 2015-06-24 | 四川新力光源股份有限公司 | LED device packaged in system-level mode |
| CN108535912A (en) * | 2017-03-03 | 2018-09-14 | 苹果公司 | Display with direct-type backlight unit |
| US11022840B2 (en) | 2017-03-03 | 2021-06-01 | Apple Inc. | Displays with direct-lit backlight units |
-
2010
- 2010-07-02 CN CN201020247464XU patent/CN201787427U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313188A (en) * | 2010-07-02 | 2012-01-11 | 刘胜 | Integrated display shell and intelligently-controlled LCD (Liquid Crystal Display) backlight module |
| CN102313188B (en) * | 2010-07-02 | 2013-11-06 | 刘胜 | Integrated display shell and intelligently-controlled LCD (Liquid Crystal Display) backlight module |
| CN102563470A (en) * | 2012-02-21 | 2012-07-11 | 南京汇兴博业数字设备有限公司 | High-brightness temperature-adaptive direct-type cold cathode fluorescent lamp liquid crystal backlight module |
| CN104733587A (en) * | 2013-12-24 | 2015-06-24 | 四川新力光源股份有限公司 | LED device packaged in system-level mode |
| CN104733587B (en) * | 2013-12-24 | 2017-10-17 | 四川新力光源股份有限公司 | A kind of LED component of system in package |
| CN108535912A (en) * | 2017-03-03 | 2018-09-14 | 苹果公司 | Display with direct-type backlight unit |
| US11022840B2 (en) | 2017-03-03 | 2021-06-01 | Apple Inc. | Displays with direct-lit backlight units |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110406 Effective date of abandoning: 20131106 |
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| RGAV | Abandon patent right to avoid regrant |