CN1570724A - Backlight assembly - Google Patents
Backlight assembly Download PDFInfo
- Publication number
- CN1570724A CN1570724A CN 03147268 CN03147268A CN1570724A CN 1570724 A CN1570724 A CN 1570724A CN 03147268 CN03147268 CN 03147268 CN 03147268 A CN03147268 A CN 03147268A CN 1570724 A CN1570724 A CN 1570724A
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- CN
- China
- Prior art keywords
- guide plate
- light guide
- light source
- backlight assembly
- reflective film
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Abstract
This is a apheliotropic component located under the display board, which comprises a light conductive plate and a light source generator which is located on first side surface of the plate and used to provide a light source. The light conductive plate comprises of a base surface coated on the plate and the first reflecting film for the light source. The light conductive plate is used to diffuse the light source reflected from its top surface to the display board.
Description
Technical field
(back light unit BLU), particularly relates to a kind of light guide plate (light guide plate, backlight assembly LGP) that is coated with a reflective film to the present invention relates to a kind of backlight assembly.
Background technology
Backlight assembly is one of key part and component of lcd products, has been widely used at present on digital camera, digital personal assistant (PDA), satellite navigation system, computer monitor and the flat-surface television.Generally speaking, backlight assembly all is located at the below of a display panel (display panel), and have a light source generator (light source generator) and a diffusing panel (diffusing plate), to provide a homodisperse light, form suitable image by the pixel electrode on the control display panel again to this display panel.Wherein, backlight assembly can be according to the position of light source, is divided into light source and produces from (direct illuminance) backlight assembly of the straight-down negative under the display panel or light source near the side-light type the display panel side (edge light) backlight assembly.Because the side-light type backlight assembly is located at the side of light guide plate with light source generator, so need can be applicable to the product of reduced size.
With reference to figure 1, Fig. 1 is known side-light type backlight assembly (back light unit, BLU) 10 a diagrammatic cross-section.As shown in Figure 1, backlight assembly 10 is located at the below of a display panel (display panel) 11, and backlight assembly 10 comprises that a light guide plate (light guide plate, LGP) be located at the diffusing panel 16 of light guide plate 12 tops, at least one prism (prism) 18 and of being located at diffusing panel 16 surfaces and be located at light guide plate 12 belows and coat light guide plate 12 and shell (housing) 20 around the light source generator 14 by 12, one light source generator 14, of being located at the side of light guide plate 12 reflecting plate (reflecting sheet) 15, of being located at light guide plate 12 belows.
Light source generator 14 is used to provide a light source, and reflecting plate 15 will be then in order to will upwards being reflected (reflect) to light guide plate 12 by this light source that light source generator 14 produces.Light guide plate 12 can make progress this light source that is reflected scattering (scatter) to diffusing panel 16, and the projection (bump) 22 that comprises at least one graphical (patterned), destroy the total reflection phenomenon of light in light guide plate 12 whereby, thereby light source is upwards scattered to diffusing panel 16 equably, and further being scattered to display panel 11, reflecting plate 15 is a sheet metal that is made of silver, aluminium or other tool high reflectance characteristic materials then.Diffusing panel 16 is in order to further scattering to display panel 11 with this light source via prism 18, and revises the difference of the irradiation intensity (intensity) of these light sources during the course with prism 18.Generally speaking, display panel 41 is a display panels (liquid crystal display panel, LCD panel), light source generator 44 then is a light emitting diode (light emitting diode, LED) fluorescent tube or a cold cathode fluorescent lamp pipe (cold cathode fluorescentlamp, CCFL).
Yet as shown in Figure 1, the design of known backlit assembly 10, can form a medium (medium) between light guide plate 12 and reflecting plate 15 is the accommodating chamber 24 of air, except meeting increases the volume of product and improves the assembling degree of difficulty of backlight assembly 10, also can cause the energy loss of this light source and the light that reduces backlight assembly 10 utilizes usefulness.More seriously, known backlit assembly 10 is under operating for a long time, its inside is tended to produce because be heated slightly torsional deformation by the reflecting plate 15 that sheet metal constituted, cause the surface smoothness of reflecting plate 15 to descend, related its this light source that reflects that causes can't possess a uniform irradiation intensity, " ripple vibration " phenomenon (wave phenomenon) that this promptly is commonly called as when further being scattered to display panel 11.This ripple oscillation phenomenon is enough to cause the display quality of display panel 11 flaw to occur, and causes the significantly landing of product competitiveness.
Summary of the invention
The object of the present invention is to provide a kind of inside to have the backlight assembly of less gas medium, with the ripple oscillation phenomenon (wave phenomenon) of avoiding above-mentioned known backlit assembly to be caused.
In a preferred embodiment of the invention, this backlight assembly is located at a display panel (display panel) below.This backlight assembly comprises a light guide plate (light guide plate, LGP) with a light source generator (light source generator) of being located at one first side of this light guide plate, and this light guide plate comprises that one is coated on first reflective film (reflecting film) of a bottom surface (bottom surface) of this light guide plate.This light source generator is used to provide a light source, and first reflective film is in order to upwards reflecting this light source, this light guide plate then in order to this light source that will be reflected via an end face (top surface) scattering (scatter) of this light guide plate to this display panel.In addition, this backlight assembly also comprises a diffusing panel (diffusing plate) and at least one prism (prism) of being located in regular turn on this light guide plate, and one is located at this light guide plate below and coats this light guide plate and this light source generator shell (housing) on every side.
Because this first reflective film and one second reflective film that this backlight assembly utilization of the present invention applies on this bottom surface, one second side, one the 3rd side and one the 4th side of this light guide plate upwards reflect this light source that is produced by this light source generator, so can omit known reflecting plate (reflecting sheet).Improvement in this design can avoid known this reflecting plate under long operation, causes " ripple vibration " phenomenon of the display quality that is enough to significantly to reduce product because of torsional deformation.In addition, because this first reflective film and this second reflective film are coated on the surface of this light guide plate, not only can reduce this light source and utilize usefulness with the light of promoting this backlight assembly because of the energy loss that air dielectric (medium) causes, also can receive and reduce small product size and the double effects of simplifying assembling process and cost, and then significantly promote the competitive power of product on market.
Description of drawings:
Fig. 1 is the diagrammatic cross-section of known backlit assembly.
Fig. 2 is the diagrammatic cross-section of backlight assembly of the present invention.
Fig. 3 is the three-dimensional enlarged diagram of the light guide plate 42 among Fig. 2.
Fig. 4 is that light guide plate 42 among Fig. 3 is along the diagrammatic cross-section of a-a axle.
Accompanying drawing parts symbol description:
10 backlight assemblies, 11 display panels
12 light guide plate, 14 light source generators
15 reflecting plates, 16 diffusing panels
18 prisms, 20 shells
22 convex lens, 24 rooms
40 backlight assemblies, 41 display panels
42 light guide plate 42a, first side
The 42d second side 42e the 3rd side
42f the 4th side 44 light source generators
46 diffusing panels, 48 prisms
50 shells, 52 first reflective films
54 second reflective films, 56 sunk structures
58 projections
Embodiment
With reference to figure 2, Fig. 2 is side-light type of the present invention (edge light) backlight assembly (back light unit, BLU) 40 a diagrammatic cross-section.As shown in Figure 2, backlight assembly 40 is located at the below of a display panel (displaypanel) 41, and backlight assembly 40 comprises: (light guide plate, LGP) 42, one light source generator (light source generator) 44, of being located at one first side 42a of light guide plate 42 is located at the diffusing panel (diffusing plate) 46 of light guide plate 42 tops to a light guide plate, at least one prism (prism) 48 and of being located at diffusing panel 46 surfaces is located at light guide plate 42 belows and is coated light guide plate 42 and light source generator 44 shell (housing) 50 on every side.
With reference to figure 3, Fig. 3 is the three-dimensional enlarged diagram of the light guide plate 42 among Fig. 2.As shown in Figure 3, based on product demand, first reflective film 52 of light guide plate 42 on comprising the bottom surface 42b that is coated on light guide plate 42, can comprise that also one is coated on the second side 42d and one the 3rd side 42e and one the 4th side 42f perpendicular to the second side 42a and end face 42c with respect to the first side 42a, be all second reflective film that metallic film constituted (secondreflecting film) 54 of silver or aluminium with first reflective film 52, with the upwards reflection of this light source of strengthening being produced by light source generator 44.What deserves to be mentioned is, because the reflection of this light source mainly is to be undertaken by first reflective film 52 on the bottom surface 42b that is coated on light guide plate 42, therefore based on the processing procedure cost consideration, also second reflective film 54 can be omitted, or only in the second side 42d, the 3rd side 42e and the 4th side 42f one or both go up and apply second reflective films 54.
With reference to figure 4, Fig. 4 is that light guide plate 42 among Fig. 3 (b) is along the diagrammatic cross-section of a-a axle.As shown in Figure 4, the bottom surface 42b that is coated with first reflective film 52 of light guide plate 42 and the second side 42d, the 3rd side 42e (not being shown among Fig. 4) that are coated with second reflective film 54 and the 4th side 42f (not being shown among Fig. 4) also comprise depression (recess) structure 56 of at least one graphical (patterned), and 56 of each sunk structures can be in the process of coating first reflective film 52 and second reflective film 54 be inserted by first reflective film 52 and second reflective film 54 and formed a patterned projection (bump) 58.Utilize itself figure and curvature, projection 58 can be revised this light source when this light source of reflection, and makes this light source be reflexed to the end face 42c of light guide plate 42 more equably, and further is scattered to display panel 41.In a preferred embodiment of the invention, sunk structure 56 all has the shape of a round dot with projection 58; Sunk structure 56 can have one with projection 58 and intersect or parallel V-structure, also can reach identical effect yet in other embodiments of the invention.
As previously mentioned, consider based on small product size, the bottom surface 42b of light guide plate 42 also can be a plane that is parallel to end face 42c, but because this design can't significantly influence the function of light guide plate 42, and light guide plate 42 with this bottom surface that is parallel to end face 42c, its detail structure and function also are equal to the light guide plate 42 that has the bottom surface 42b that is not parallel to end face 42c in aforementioned each paragraph, so do not give unnecessary details separately at this.
Compare with known backlight assembly 10 among Fig. 1, backlight assembly 40 of the present invention utilizes first reflective film 52 and second reflective film 54 on bottom surface 42b, the second side 42d, the 3rd side 42e and the 4th side 42f that is coated on light guide plate 42 upwards to reflect this light source that is produced by light source generator 44, so can omit known reflecting plate (reflecting sheet) 15.Improvement in this design can avoid known reflecting plate 15 under long operation, causes " ripple vibration " phenomenon (wave phenomenon) of the display quality that is enough to significantly to reduce product because of torsional deformation.In addition, because first reflective film 52 and second reflective film 54 are the bottom surface 42b that are applied directly to light guide plate 42, make between the light guide plate 42 and first reflective film 52 and do not have any space, not only can reduce this light source and utilize usefulness with the light of promoting backlight assembly 40 because of the energy loss that air dielectric (medium) causes, also can receive and reduce small product size and the double effects of simplifying assembling process and cost, and then significantly promote the competitive power of product on market.
The above is the preferred embodiments of the present invention only, and all equivalent variations and modifications of being done according to claims scope of the present invention all should belong to claims covering scope of the present invention.
Claims (7)
1. backlight assembly, this backlight assembly are located at display panel below, and this backlight assembly comprises:
One light guide plate, this light guide plate comprises:
One first reflective film is coated on a bottom surface of this light guide plate; And
One is located at the light source generator of one first side of this light guide plate, and this first reflective film in order to the reflection by the light that this light source generator produced, this light guide plate then makes this reflected light scatter to this display panel via an end face of this light guide plate.
2. backlight assembly as claimed in claim 1, it is characterized in that: this light guide plate also comprises at least one second reflective film, this second reflectance coating is coated on this first side, this bottom surface and this end face plane in addition of this light guide plate, in order to reflect the light that this light source generator produces.
3. backlight assembly as claimed in claim 2 is characterized in that: this first reflective film and this second reflective film are one by film that silver or aluminium constituted.
4. backlight assembly as claimed in claim 1 is characterized in that: this bottom surface of this light guide plate comprises at least one patterned first depression.
5. backlight assembly as claimed in claim 1 is characterized in that: this first reflective film comprises one by inserting patterned first projection that this first this first reflective film that caves in is constituted.
6. backlight assembly as claimed in claim 2 is characterized in that: each the described plane that is coated with this second reflective film on this light guide plate comprises at least one patterned second depression.
7. backlight assembly as claimed in claim 6 is characterized in that: this second reflective film comprises one by inserting patterned second projection that this second this second reflective film that caves in is constituted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031472680A CN100412642C (en) | 2003-07-11 | 2003-07-11 | Backlight assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031472680A CN100412642C (en) | 2003-07-11 | 2003-07-11 | Backlight assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1570724A true CN1570724A (en) | 2005-01-26 |
| CN100412642C CN100412642C (en) | 2008-08-20 |
Family
ID=34471884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031472680A Expired - Fee Related CN100412642C (en) | 2003-07-11 | 2003-07-11 | Backlight assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100412642C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102667550A (en) * | 2009-10-12 | 2012-09-12 | Iti苏格兰有限公司 | Light guides |
| CN102661574A (en) * | 2012-04-28 | 2012-09-12 | 深圳市华星光电技术有限公司 | Light guide plate and backlight mould provided with same |
| CN104597557A (en) * | 2015-03-03 | 2015-05-06 | 京东方科技集团股份有限公司 | Composite light guide plate and preparation method thereof, as well as backlight module and display device |
| CN104678468A (en) * | 2013-11-26 | 2015-06-03 | 乐金显示有限公司 | Reflective sheet and method of manufacturing the same |
| US9217822B2 (en) | 2010-03-26 | 2015-12-22 | Iti Scotland Limited | Encapsulated LED array and edge light guide device comprising such an LED array |
| JP2017041330A (en) * | 2015-08-18 | 2017-02-23 | 恵和株式会社 | Light guide sheet, backlight unit, liquid crystal display device and manufacturing method of light guide sheet for backlight unit |
| CN109507822A (en) * | 2019-01-14 | 2019-03-22 | 惠州市华星光电技术有限公司 | Backlight module and liquid crystal display device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116893B (en) * | 2011-03-10 | 2012-10-03 | 广州创维平面显示科技有限公司 | Light guide plate manufacturing method, light guide plate, backlight module and liquid crystal display |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2310926Y (en) * | 1997-09-26 | 1999-03-17 | 陈兴 | Area source device for LED |
| JPH11353922A (en) * | 1998-06-10 | 1999-12-24 | Advanced Display Inc | Lighting system, liquid crystal display device equipped with it and manufacture of lighting system |
| JP2002244127A (en) * | 2001-01-31 | 2002-08-28 | Internatl Business Mach Corp <Ibm> | Liquid crystal display, side light type backlight unit, lamp reflector and reflection member |
-
2003
- 2003-07-11 CN CNB031472680A patent/CN100412642C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102667550A (en) * | 2009-10-12 | 2012-09-12 | Iti苏格兰有限公司 | Light guides |
| CN102667550B (en) * | 2009-10-12 | 2017-03-15 | 设计Led产品有限公司 | Light conductor |
| US9217822B2 (en) | 2010-03-26 | 2015-12-22 | Iti Scotland Limited | Encapsulated LED array and edge light guide device comprising such an LED array |
| CN102661574A (en) * | 2012-04-28 | 2012-09-12 | 深圳市华星光电技术有限公司 | Light guide plate and backlight mould provided with same |
| CN102661574B (en) * | 2012-04-28 | 2014-05-21 | 深圳市华星光电技术有限公司 | Light guide plate and backlight mould provided with same |
| CN104678468A (en) * | 2013-11-26 | 2015-06-03 | 乐金显示有限公司 | Reflective sheet and method of manufacturing the same |
| CN104678468B (en) * | 2013-11-26 | 2017-11-14 | 乐金显示有限公司 | Reflector plate and its manufacture method |
| US10473293B2 (en) | 2013-11-26 | 2019-11-12 | Lg Display Co., Ltd. | Reflective sheet and method of manufacturing the same |
| CN104597557A (en) * | 2015-03-03 | 2015-05-06 | 京东方科技集团股份有限公司 | Composite light guide plate and preparation method thereof, as well as backlight module and display device |
| WO2016138736A1 (en) * | 2015-03-03 | 2016-09-09 | 京东方科技集团股份有限公司 | Composite light guide plate, preparation method thereof, backlight module and display device |
| JP2017041330A (en) * | 2015-08-18 | 2017-02-23 | 恵和株式会社 | Light guide sheet, backlight unit, liquid crystal display device and manufacturing method of light guide sheet for backlight unit |
| CN109507822A (en) * | 2019-01-14 | 2019-03-22 | 惠州市华星光电技术有限公司 | Backlight module and liquid crystal display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100412642C (en) | 2008-08-20 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080820 Termination date: 20210711 |