CN101833196A - Direct-light type LED backlight superhigh-brightness liquid crystal display screen - Google Patents
Direct-light type LED backlight superhigh-brightness liquid crystal display screen Download PDFInfo
- Publication number
- CN101833196A CN101833196A CN201010174315A CN201010174315A CN101833196A CN 101833196 A CN101833196 A CN 101833196A CN 201010174315 A CN201010174315 A CN 201010174315A CN 201010174315 A CN201010174315 A CN 201010174315A CN 101833196 A CN101833196 A CN 101833196A
- Authority
- CN
- China
- Prior art keywords
- backlight
- liquid crystal
- light
- wall scroll
- direct
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a direct-light type LED backlight liquid crystal display screen with superhigh brightness, comprising a liquid crystal display panel, a light guide plate, a backlight rear iron frame and a single strip embedded with a plurality of high-brightness LEDs, wherein the LEDs are directly embedded on a substrate of the single strip and wholly encapsulated on the single strip, thereby omitting the traditional process of welding the LEDs to the substrate; the single strip is closely attached with the backlight rear iron frame and screwed on the backlight rear iron frame through high-performance heat-conducting silica gel and a positioning hole arranged on the substrate, and the high-performance heat-conducting silica gel is contacted with the LEDs. The plurality of high-brightness LEDs are connected in series or in parallel so as to achieve the optimal reliability matching, the LEDs inside the single strip adopt a starry structure, which ensures that the liquid crystal screen has evener brightness. The invention has novel structure, stronger heat dissipation function due to embedded LED design and the contacted high-performance heat-conducting silica gel as well as evener and higher brightness.
Description
Technical field
The present invention relates to the liquid crystal screen back light source technical field, particularly a kind of direct-light type LED backlight LCDs of super brightness.
Background technology
In the 21st century of low-carbon (LC) and environmental protection, light emitting diode replaces cold-cathode tube as light source, and the efficient that makes electricity change light significantly improves, the reduction of heat radiation, and the mercury content of product light source is from having to nothing.In the liquid crystal screen back light source product, the photoelectricity effect and the utilization rate of electrical of product cause direct influence to end product.Along with liquid crystal display is more and more universal, more and more higher to the brightness and the brightness uniformity requirement of module, present LCDs all is difficult to reach the display effect of super brightness.
By on China and foreign patent board web, retrieving following four patents that relate to liquid crystal display and backlight technological improvement:
Patent one: the Chinese patent publication number is that the patent of invention of CN101169553 discloses a kind of middle large scale visible area size liquid crystal screen backlight product, it comprises that light source position reaches and the relativeness of luminous zone, principal feature is that the level of light source primary optical axis and luminous zone is an angle, and the scope of angle is between 20～60 degree; Its light source arrangement is special, and along with the minimizing of quantity of light source, has reduced the consumption to earth non-renewable energy resources, has saved the energy, uses light emitting diode to replace cold-cathode tube as light source.
Patent two: the Chinese patent publication number is that the utility model patent of CN201116710 discloses a kind of liquid crystal screen backlight product that is provided with radiator structure, comprise light source and luminous zone, principal feature is, heat is scattered and disappeared away rapidly by chase under heat conduction aluminium and the product, heat energy is greatly reduced the influence of product.
Patent three: U.S. Patent Publication No. is 10/988, and the patent of 334c has realized with side mode backlight, by the special heat radiation substrate of design on light emitting diode, reaches highdensity light emitting diode integration mode.
Patent four: U.S. Patent Publication No. be 10/917,383 patent by to the light emission direction reality of single light emitting diode and the arrangement design of substrate, realized the uniformity of luminance and the simple integrated technique of direct-type backlight.
Above-mentioned four patents all do not have and have following shortcoming respectively: patent one because the restriction of position, cannot high density realize the arrangement of light emitting diode with patent two, therefore can't realize high brightness; Patent three even realized the high density LED encapsulation of unit substrate, but because lateralarea is limited, can't reach the display effect of high brightness owing to adopted survey backlight.Patent four, the size of its single light emitting diode is bigger than normal, cannot place a large amount of described light emitting diodes in whole viewing area, and design is complicated, and cost improves greatly.Therefore, prior art also can't realize the LED display effect of super brightness.
Summary of the invention
In order to overcome the defective that above-mentioned prior art exists, the invention provides a kind of direct-light type LED backlight superhigh-brightness liquid crystal display screen, take the design and the rational radiating mode of straight-down negative LED backlight, make the brightness of LCDs reach super bright standard, can be implemented in good display effect under the various complicated optical environment such as sunlight direct projection, walkway displaying.
To achieve these goals, technical scheme of the present invention is as follows:
Direct-light type LED backlight superhigh-brightness liquid crystal display screen, comprise placing display panels, back chase backlight, light guide plate, closely pasting and encapsulate the wall scroll of many light emitting diodes mutually that the light beam that light emitting diode sends on the wall scroll projects on the described display panels through described light guide plate with described back chase backlight.
Be characterized in, described light emitting diode is arranged to direct LED backlight, it be the bottom of LCDs send white the divergence form light beam on described light guide plate, light guide plate becomes the divergence form refraction of optical beam on the described display panels of projecting of the equal light state of area source.
Further, because above-mentioned light emitting diode is a direct-type backlight, its light beam that sends is that a covering of the fan projects on the light guide plate, regulate the homogenising that distance between described light guide plate and the light emitting diode realizes light according to actual conditions, the distance of light guide plate and light emitting diode is traditionally arranged to be 10-20mm, makes the brightness of LCDs higher.
Described light guide plate possesses good astigmatism and light transmission features, and the uniformity coefficient that guarantees light is more than 85%; What the design of described light emitting diode single internal was adopted is the babysbreath structure, realizes that to greatest extent the light that shines on the light guide plate can scatter on the display panels equably, thereby realizes uniform display effect.
Many light emitting diodes connect by series-parallel mode, then integral body are directly embedded on the substrate of wall scroll, so just be packaged on the wall scroll-be the embedded packaged type of Chip on Board, saved the process that traditional LED is welded to substrate;
Weld together in series-parallel mode by high temperature wire between the wall scroll of described embedding light emitting diode and the wall scroll, wherein, the high temperature wire of avoiding welding blocks the light path of described light emitting diode.
Further, offer pilot hole on the substrate of described wall scroll, adopt screw and described wall scroll is screwed on the back chase backlight by described pilot hole, then with heat conductive silica gel with both tight bond.
Place a large amount of high-performance heat conduction bars behind the described back chase backlight, the light emitting diode that embeds on described high-performance heat conduction bar and the wall scroll contacts, make its contact area maximization during installation, the most of heat that sends during light emitting diode work conducts by described a large amount of high-performance heat conduction bar, the area of dissipation of LCDs is improved about 20-30 times, improved radiating efficiency greatly, light emitting diode also is difficult for being burnt out, and has prolonged its serviceable life.
Further, described light emitting diode wall scroll is realized with extraneous being connected by the pad that is arranged on the wall scroll both sides, realizes by the wall scroll on welding high temperature wire and next door and the power supply of outside;
The power supply of outside of the present invention relies on constant-current supply to realize, by the series-parallel calculating to light emitting diode connection in series-parallel and wall scroll, calculates and drives needed electric current of entire module and voltage, and the mode by constant current drives.
The invention has the beneficial effects as follows, ultra-high brightness LED demonstration backlight, heat sinking function is strong, and no fan design reduces noise and energy consumption, no mercury pollution, energy-conserving and environment-protective.
Use the light emitting diode of the embedded packaged type of up-to-date COB (Chip on Board) first, thermal diffusivity, inheritance is better, and the life-span is long, the reliability height.
Description of drawings
Fig. 1 is the wall scroll structural representation of embedded encapsulation LED.
Fig. 2 is the enlarged diagram of the solid brilliant pad unitized construction among Fig. 1.
Fig. 3 is the enlarged diagram of the embedded light emitting diode among Fig. 2.
Among the figure, 01, solid brilliant pad, 02, solid brilliant pad, 1, solid brilliant pad, 11, sheet metal, 12, white oil silk-screen ring; 2, wall scroll, 21, substrate, 22, pilot hole, 3, the preparation line of cut, 4, preparation cutting back pad, 5, light emitting diode, 6, high temperature wire.
Embodiment:
Be easy to understand understanding in order to make creation characteristic of the present invention, technological means and to reach purpose, further set forth the present invention below in conjunction with specific embodiment.
Embodiment:
Referring to Fig. 1, a kind of direct-light type LED backlight superhigh-brightness liquid crystal display screen mainly comprises liquid crystal display display panel, light guide plate, the wall scroll 2 and back chase backlight of light emitting diode is set.
Described display panels, light guide plate and back chase position and structure and the existing very big difference that there is no backlight, be characterized in, described wall scroll 2 adopts many light emitting diodes of embedded encapsulation, a plurality of wall scrolls 2 adopt forms direct-light-type backlight in series-parallel mode, and the divergence form light beam that sends white from the bottom backlight of liquid crystal display is on described light guide plate.
Many light emitting diodes 5 are to connect in the mode of connecting, the both sides of described many light emitting diodes 5 are provided with sheet metal 11, by high temperature wire 6 each adjacent metal sheet 11 is connected in series again, adopt solid brilliant pad 1 that described light emitting diode 5, sheet metal 11 are implemented welding with high temperature wire 6, integral body is directly embedded on the substrate 21 of wall scroll 2 then, promptly is encapsulated on the described wall scroll 2; Said process is exactly the embedded packaged type of COB (Chip on Board) that the present invention adopts.
At the position preparation line of cut 3 that the light emitting diode wall scroll is fit to, effect is that a kind of design goes for various super bright sizes, after wall scroll 2 cuttings, can carry out the splicing of unit length.
Place a large amount of high-performance heat conduction bars (not marking among the figure) behind the described back chase backlight, the light emitting diode 5 that embeds on described high-performance heat conduction bar and the wall scroll 2 contacts, make both contact area maximizations during installation, help light emitting diode and rapidly heat is conducted, improve its radiating efficiency.
Be to combine in the mode of serial or parallel connection between a plurality of wall scrolls 2 by the high temperature wire welding, wall scroll 2 is realized with extraneous being connected by the solid brilliant pad 01 and 02 that is arranged on wall scroll 2 both sides, realizes by the wall scroll on welding high temperature wire and next door and the power supply of outside;
The power supply of outside of the present invention relies on constant-current supply to realize, the calculating by to the series connection of light emitting diode series connection and wall scroll calculates and drives needed electric current of entire aphototropism mould and voltage, and the mode by constant current drives.
Referring to Fig. 2, be installed in the solid brilliant pad 1 of wall scroll 2, comprise white oil silk-screen ring 12 and two blocks of foils 11, described white oil silk-screen ring 12 exceeds PCB surface 0.1mm, can not cover inboard pad; The internal diameter of white oil silk-screen ring 12 is 5.5mm, and external diameter is 6.5mm.
The PCB wiring board is selected the single-sided aluminum-base heat sink of 1.20mm thickness for use.
Referring to Fig. 3, the embedded light emitting diode of COB (Chip on Board), its design feature is: the luminescence chip of light emitting diode is directly embedded on the substrate of wall scroll, be connected to the circuit of wall scroll by the backguy that is similar to Chip Packaging, see on the whole, described luminescence chip just has been integrated on the whole wall scroll, has lacked the part of welding than traditional packaged type, so has dispelled the heat and better reliability.
By the direct-light type LED backlight superhigh-brightness liquid crystal display screen that such scheme constitutes, display brightness superelevation and even, rapid heat dissipation, constant current source drives, long service life.
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (8)
1. direct-light type LED backlight superhigh-brightness liquid crystal display screen, comprise display panels, light guide plate, the wall scroll of light emitting diode and back chase backlight are set, the light beam that light emitting diode sends scatters on the described display panels through described light guide plate, it is characterized in that
Described light emitting diode is arranged to direct-light-type backlight, and integral body was directly embedded on the substrate of a wall scroll after many light emitting diodes adopted the serial or parallel connection mode to connect;
Be packaged with between the wall scroll of light emitting diode and the wall scroll by the high temperature wire welding, described wall scroll and closely subsides mutually of back chase backlight are provided with high-performance heat conduction bar behind the described back chase backlight, and contact with described light emitting diode.
2. direct-light type LED backlight superhigh-brightness liquid crystal display screen according to claim 1 is characterized in that, offers pilot hole on the substrate of described wall scroll, adopts screw by described pilot hole wall scroll to be screwed on the back chase backlight.
3. direct-light type LED backlight superhigh-brightness liquid crystal display screen according to claim 2 is characterized in that, described wall scroll and back chase backlight are also bonding by heat conductive silica gel.
4. direct-light type LED backlight superhigh-brightness liquid crystal display screen according to claim 1 is characterized in that, described wall scroll is connected by heat conductive silica gel and screw with back chase backlight.
5. direct-light type LED backlight superhigh-brightness liquid crystal display screen according to claim 1 is characterized in that the light emitting diode of described single internal is arranged to the babysbreath structure, and the light beam that shines on the light guide plate can be scattered on the display panels uniformly.
6. according to claim 1 or 4 described direct-light type LED backlight superhigh-brightness liquid crystal display screens, it is characterized in that, solid brilliant pad is set on the described wall scroll, and the solid brilliant pad on its both sides is welded with high temperature wire, and wall scroll is connected with the externally fed source by the solid brilliant pad and the high temperature wire on both sides.
7. direct-light type LED backlight superhigh-brightness liquid crystal display screen according to claim 5 is characterized in that, constant-current driving is adopted in described externally fed source.
8. direct-light type LED backlight superhigh-brightness liquid crystal display screen according to claim 1 is characterized in that the distance of described light emitting diode and light guide plate is set to 10-20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010174315A CN101833196A (en) | 2010-05-13 | 2010-05-13 | Direct-light type LED backlight superhigh-brightness liquid crystal display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010174315A CN101833196A (en) | 2010-05-13 | 2010-05-13 | Direct-light type LED backlight superhigh-brightness liquid crystal display screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101833196A true CN101833196A (en) | 2010-09-15 |
Family
ID=42717323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010174315A Pending CN101833196A (en) | 2010-05-13 | 2010-05-13 | Direct-light type LED backlight superhigh-brightness liquid crystal display screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101833196A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470247A (en) * | 2015-12-31 | 2016-04-06 | 广州市雷腾照明科技有限公司 | Light emitting diode (LED) light source and package method thereof |
| CN108107630A (en) * | 2018-02-07 | 2018-06-01 | 深圳市国显科技有限公司 | A kind of LED shields liquid crystal display die set comprehensively |
| CN110308584A (en) * | 2019-05-23 | 2019-10-08 | 安徽芯瑞达科技股份有限公司 | A kind of ultra-thin babysbreath backlight approach |
-
2010
- 2010-05-13 CN CN201010174315A patent/CN101833196A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470247A (en) * | 2015-12-31 | 2016-04-06 | 广州市雷腾照明科技有限公司 | Light emitting diode (LED) light source and package method thereof |
| CN105470247B (en) * | 2015-12-31 | 2018-06-26 | 广东雷腾智能光电有限公司 | A kind of LED light source and its packaging method |
| CN108107630A (en) * | 2018-02-07 | 2018-06-01 | 深圳市国显科技有限公司 | A kind of LED shields liquid crystal display die set comprehensively |
| CN110308584A (en) * | 2019-05-23 | 2019-10-08 | 安徽芯瑞达科技股份有限公司 | A kind of ultra-thin babysbreath backlight approach |
| CN110308584B (en) * | 2019-05-23 | 2022-04-19 | 安徽芯瑞达科技股份有限公司 | Ultrathin starry backlight method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201909192U (en) | Improved LED (light-emitting diode) module | |
| CN202182365U (en) | LED light strip, side light type backlight module and display | |
| CN201599769U (en) | LED street lamp with over-current heat-dissipating function | |
| CN201606852U (en) | Double light source via hole radiating LED street lamp | |
| CN203192852U (en) | Led packaging structure | |
| CN101833196A (en) | Direct-light type LED backlight superhigh-brightness liquid crystal display screen | |
| CN201992413U (en) | Fin type external power supply LED (light-emitting diode) fluorescent lamp | |
| CN201749271U (en) | LED (light-emitting diode) backlighting ultra-bright liquid crystal display (LCD) screen | |
| CN204460011U (en) | A kind of vapour automobile-used LED Rear Fog Lamp | |
| CN104748035A (en) | Automobile LED rear fog lamp | |
| CN201858552U (en) | Light-emitting device of semiconductor light source | |
| CN101294660B (en) | LED lighting lamp | |
| CN201034271Y (en) | Single-faced lamp box employing LED illuminating source | |
| CN202056656U (en) | High heat dissipation LED (Light Emitting Diode) street lamp | |
| CN103227266B (en) | LED encapsulation structure | |
| CN203571518U (en) | Light bar and backlight source with same | |
| CN209012886U (en) | A kind of LED backlight mould group of high brightness and LED display | |
| CN207818094U (en) | A kind of LED light bar display screen | |
| CN201462504U (en) | Light emitting diode light source module | |
| CN201330949Y (en) | Strip LED lamp | |
| CN203176787U (en) | Led diode | |
| CN203517438U (en) | LED integrated encapsulation fluorescent lamp structure | |
| CN201629331U (en) | High-voltage AC packaged LED | |
| CN201661943U (en) | Modified LED screen backlight structure | |
| CN220603811U (en) | Backlight plate with high connection strength |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100915 |