CN1227562C - Light weight back light module - Google Patents
Light weight back light module Download PDFInfo
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- CN1227562C CN1227562C CN 02158376 CN02158376A CN1227562C CN 1227562 C CN1227562 C CN 1227562C CN 02158376 CN02158376 CN 02158376 CN 02158376 A CN02158376 A CN 02158376A CN 1227562 C CN1227562 C CN 1227562C
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- light
- guide plate
- light guide
- backlight module
- reflection
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Abstract
The present invention relates to a light backlight module which mainly comprises a light source, a reflecting lamp shade, a light guiding plate, wherein the light guiding plate is shrunk and recessed inwards. A plurality of micro-miniature cup-shaped objects make the reflection layer have unique and different reflection effects, and a plurality of lamp tubes arranged in a stack mode form a light source component. The light backlight module is provided with the reflecting lamp shade which has a corresponding radian and the ability of gathering light, so that the reflecting lamp shade guides the light ray emitted by the light source into the light guiding plate, and accordingly, the luminance is more ideal. The lamp tubes are arranged in the stack mode, so the energy absorbed among the lamp tubes is little, and no energy is lost. Since the light guiding plate of the backlight module is shrunk and recessed inwards, the integral weight of the light guiding plate can be reduced.
Description
Technical field
The present invention relates to a kind of lightweight backlight module, it can satisfy the production demand of at present the most popular opto-electronics circle and for example can be used in the LCD etc., and have make image quality brightness evenly, weight saving, the advantage that do not take up space and can effectively utilize source light.
Background technology
Disclose reflection LCD and mini information electronic product in No. the 21883/2001st, the disclosed Japanese patent laid-open publication gazette January 26 calendar year 2001, and it relates generally to the slim light-weighted implementation method of reflection LCD.Wherein, reflection LCD is provided with Polarizer, phasic difference plate, diffuser plate, colorful film, transparency electrode, liquid crystal layer between two relative glass substrates, these parts are arranged in order, and be provided with uneven jog near on the glass substrate of beholder's one end, so that preceding light (front light) light guide plate function to be provided, described preceding photoconduction tabula rasa comprises near user's substrate and the light source that is arranged on close user's substrate side surfaces.
January 5 nineteen ninety No. the 00017/1990th, disclosed Japanese patent laid-open publication gazette and March 26 nineteen ninety disclosed Japanese patent laid-open publication gazette No. 84618/1990 a kind of planar light source unit has been described, wherein, it with a photoconductive tube (light guide pipe) as first element, it has a light entrance face (light incident surface), a light emitting surface (light emitting surface), this light emitting surface and light entrance face quadrature, a reflecting surface faces light emitting surface, and the mode with light extracting mechanism (light extraction mechanism) forms, light extracting mechanism (light extractionmechanism) has another name called and is light withdrawal device (light extractor), and the opposite end of photoconductive tube is provided with light source; On the other hand, it with a kind of light-operated film-making (light control sheet) as second element, it has a prism group (prism array), this prism group (prism array) is arranged to be adjacent to the surface of emission of photoconductive tube, and has leg-of-mutton prism (prism), and be arranged in and make the top end of prism towards the light-emitting area of photoconductive tube, wherein, the formed generation line of the prism of arbitrary composition photoconductive tube (generating line) almost is parallel to light emitting source, and a reflector plate (reflecting sheet) or reflecting surface (reflecting surface) are arranged to be adjacent to the light reflective surface (light reflectingsurface) of photoconductive tube.Simultaneously, March 26 nineteen ninety, disclosed Japanese patent laid-open publication gazette disclosed a kind of homogeneous surface atomizing processing (surface-roughening treatment) for No. 84618/1990 in the light emitting surface (light emitting surface) of first element.In above-mentioned two lists of references, the equal loss of light is in a specific direction, yet but can not be satisfied with actual optical characteristics, as the emission light that can not from light-emitting area, obtain having satisfied uniformity coefficient (referring to No. the 18879/1994th, disclosed Japanese patent laid-open publication gazette on January 28th, 1994).Particularly, there is no existing planar light source device, it can moderately provide broad visual angle, and is suitable as a kind of planar light source unit (planar light sourceunit), to be used in monitor or the thin plate televisor as a kind of LCD.
In the prior art, often the arrangement mode with many tubes is adjusted into arrangement alternately, to reduce the thickness of backlight modular structure.But, in staggered many tubes, the light that back bank light pipe sends obviously can can't arrive and enter light guide plate because of covering of front-seat fluorescent tube, thus produce the poor effect that improves the briliancy situation, energy loss big (energy absorbs mutually between fluorescent tube) with and weight unfavorable factor such as compare with single fluorescent tube greatly.
Summary of the invention
In view of this, the objective of the invention is to propose a kind of lightweight backlight module, it can solve the most popular opto-electronics circle production demand at present, being applied in the LCD etc., and have make image quality brightness evenly, weight saving, saving space and the advantage that can effectively utilize source light.
For achieving the above object, the present invention proposes a kind of lightweight backlight module, and it comprises: light source, and this light source is used to provide light, information is shown on the LCD; Reflection lampshade is used to reflect the light that this light source sends; Light guide plate, this light guide plate has an output surface, at least one first surface and a reflection horizon, this output surface be positioned at opposing face to and be parallel to a side of panel of LCD, this output surface and this first surface constitute the upper and lower surface of this light guide plate respectively, and this light guide plate has at least one side, to be received from the light that this light source sends, this side is positioned on the position of this light source; This reflection horizon is positioned at the top in abutting connection with this first surface, so that after light is directed in this light guide plate from the both sides of this light guide plate, the existing non-light that directly penetrates this light guide plate will reflect downwards because of inner full-reflection, and arrive this reflection horizon of this light guide plate, thereby reflected by this reflection horizon and leave this light guide plate by output surface; A plurality of hypomegetic cups are positioned on this reflection horizon; Wherein, this light guide plate is shunk indent from this first surface; A plurality of fluorescent tubes of arranging in the storehouse mode are positioned at arbitrary end of this light guide plate, and these a plurality of fluorescent tubes constitute light sources; Have radian and have the reflection lampshade of light gathering to be positioned at arbitrary end of this light guide plate, this has radian and has the reflection lampshade of light gathering to cooperate the light reflection direction of design in advance, thereby will import light guide plate by the light that light source sends.
As seen, the lightweight backlight module knot that the present invention proposes has solved the production demand of at present the most popular opto-electronics circle with unique design on the backlight module light guide plate, and can be conveniently used in the LCD etc.In addition, its also have can make image quality brightness evenly, weight saving and save advantage such as space.
More particularly, lightweight backlight module of the present invention has following major advantage:
The first, the present invention is because luminous energy can penetrate light guide plate to greatest extent, so brightness is more satisfactory.
The second, by arranging fluorescent tube in the storehouse mode, the energy absorption between fluorescent tube is less, and energy does not lose.
The 3rd, shrink indent by the light guide plate that makes backlight module, thereby can alleviate the overall weight of light guide plate greatly.
Description of drawings
Below in conjunction with drawings and the specific embodiments structure of the present invention is described in further detail.Wherein:
Fig. 1 is the structural representation of a kind of backlight module in the prior art.
Fig. 2 is the structural representation of another kind of backlight module in the prior art.
Fig. 3 is the sectional view according to first embodiment of lightweight backlight module of the present invention.
Fig. 4 is the profile according to first embodiment of lightweight backlight module of the present invention.
Fig. 5 is the sectional view according to second embodiment of lightweight backlight module of the present invention.
Fig. 6 is the profile according to second embodiment of lightweight backlight module of the present invention.
Fig. 7 is the side perspective view according to second embodiment of lightweight backlight module of the present invention.
Embodiment
At first, Figure 1 shows that the structural representation of a kind of backlight module of the prior art.In Fig. 1, the structure of this backlight module mainly is applicable to 18 o'clock-20 o'clock LCD.Because the size of LCD is bigger than 15 o'clock general LCD, thereby light its brightness when arriving at light guide plate 2 middle parts that is provided by side light source 1 is obviously comparatively not enough.Therefore, need with many tubes 10 illuminations, to remedy the deficiency of light luminance.But, after many tubes 10 are arranged in the storehouse mode, obviously can increase the thickness A of light guide plate 2, this thickness is approximately 10 to 13 millimeters (mm), thereby causes the unfavorable factor to selling.
Fig. 2 is the structural representation of another kind of backlight module in the prior art.In the structure of backlight module shown in Figure 2, be the excessive shortcoming of the thickness that overcomes existing backlight module shown in Figure 1, its arrangement mode with many tubes 12,14 is adjusted, and changes the staggered form that adopts into.Thus, though the thickness of backlight module is reduced to thickness B, this thickness B is approximately 8 to 10 millimeters (mm), but at staggered many tubes 12, in 14, back bank light pipe 12 obviously can can't arrive and enter light guide plate 2 because of covering of front-seat fluorescent tube 14, thus cause the effect that improves the briliancy situation not good, cause energy loss (energy absorbs mutually between fluorescent tube) and with the mode that adopts single fluorescent tube unfavorable factors such as weight/power ratio is bigger mutually.
As can be seen, the present invention can overcome above-mentioned many unfavorable factors of the prior art well from the following specific embodiments of the invention of describing by way of example.
Fig. 3 is the sectional view according to first embodiment of lightweight backlight module of the present invention.The lightweight backlight module of first embodiment of the invention mainly is made of following each parts: light source 1, the main application of this light source 1 is for providing light, according to the first embodiment of the present invention, the light that the lightweight backlight module is provided by light source 1 remedies the deficiency of nature or indoor light irradiation, so information can be presented on the LCD (not shown); Reflection lampshade 16, the main application of this reflection lampshade 16 enters light guide plate (lightguide plate) 2 for the light reflection that the fluorescent tube 10 with light source 1 is sent; Light guide plate 2, this light guide plate 2 has an output surface 20,22 and reflection horizon 24 of at least one first surface (first surface), output surface 20 be positioned at opposing face to and be parallel to a side of panel of LCD (not shown), and output surface 20 is positioned at relative two ends with first surface 22, and constitutes the upper and lower surface of light guide plate 2 respectively.
Fig. 4 is the cut-away section enlarged drawing according to first embodiment of lightweight backlight module of the present invention.Wherein, light guide plate 2 has at least one side 26, so that receive from light source (lightsource) 1 light that is sent, and side 26 is positioned on the position of light source 1.Light itself sends from fluorescent tube 10, and a part of light sends via reflection lampshade 16 reflections, and enters light guide plate 2.
The both sides of light guide plate 2 can be used as the position that light source 1 is set, and light source 1 comprises itself: at least one luminous lamp tube (light tube) 10 and reflection lampshade (reflective chimney) 16.
24 positions, reflection horizon own are in abutting connection with the top of first surface 22, its major function is to make light 5 after the both sides importing light guide plate 2 of light guide plate 2, if there is the light 50 (medium of advancing of the incident ray 5 of first embodiment of lightweight backlight module of the present invention is a light guide plate 2) that does not directly penetrate light guide plate 2, then act in the total reflection of medium inside of advancing (intemal total reflection) owing to incident ray 5, make incident ray 5 reflect downwards, light 50 arrives the reflection horizon 24 of light guide plate 2 after a while and is reflected 24 reflection of layer.Afterwards, light 50 turn back by and leave light guide plate 2.By this, light guide plate 2 can be strengthened the brightness (brightness) of display.
First embodiment of lightweight backlight module of the present invention is characterised in that: light guide plate 2 itself is shunk indent from first surface 22, and its transverse section can present the wedge shape invaginated type that approaches in the multi-line section mode.In this way, the lightweight backlight module of first embodiment of the invention can alleviate the overall weight of light guide plate 2.In addition, the narrowest place of depth of the transverse section of the light guide plate 2 of first embodiment of the invention is positioned at the middle part of the transverse section of light guide plate 2, and its scope is between 4 to 6 millimeters (mm).Depth the widest part of the transverse section of light guide plate 2 then is positioned at the end of the transverse section of light guide plate 2, and its scope is between 6 to 8 millimeters (mm).
The feature of first embodiment of lightweight backlight module of the present invention also is: a plurality of microminiature cups (miniature cups) 240 are arranged in reflection horizon 24, and it makes reflection horizon 24 that unique different reflecting effect can be arranged.The main foundation of the calculating of this reflecting effect department nile law (Snell ' slaw).The cup 240 of first embodiment of lightweight backlight module of the present invention has illustrated its amplification plan view for having the shrinkage pool 242 of multiple faceted pebble among Fig. 4.
The feature of first embodiment of lightweight backlight module of the present invention also is: arrange a plurality of fluorescent tubes 10 in the storehouse mode, fluorescent tube 10 positions own are that the arbitrary end (short side) that is positioned at light guide plate 2 is located, thereby become the part of light source 1.
The feature of first embodiment of lightweight backlight module of the present invention also is: be provided with the reflection lampshade 16 that has corresponding radian and light gathering is arranged, the calculating of the corresponding radian of this reflection lampshade that light gathering arranged mainly also is according to department's nile law (Snell ' s law).Having corresponding radian and the position of the reflection lampshade 16 of light gathering is arranged is arbitrary end of light guide plate 2, from the light that fluorescent tube 10 sent 5 of light source 1 via having corresponding radian after the reflection lampshade 16 of light gathering is arranged, owing to designed the reflection direction of light 5 in advance, so the light 5 that can effectively light source 1 be sent is directed in light guide plate 2 to greatest extent and becomes light 52.
Fig. 5 is the sectional view of second embodiment of lightweight backlight module according to the present invention.The lightweight backlight module of second embodiment of the invention mainly is made of following each parts: light source 1, the main application of this light source 1 is for providing light, according to a second embodiment of the present invention, the light that the lightweight backlight module is provided by light source 1 remedies the deficiency of nature or indoor light irradiation, so information can be presented on the LCD (not shown); Reflection lampshade 16, the main application of this reflection lampshade 16 enters light guide plate 2 for the light reflection that the fluorescent tube 10 with light source 1 is sent; Light guide plate 2, this light guide plate 2 has an output surface 20, at least one first surface 22 and a reflection horizon 24, output surface 20 be positioned at opposing face to and be parallel to a side of panel of LCD (not shown), and output surface 20 is positioned at opposite two ends with first surface 22, and constitutes the upper and lower surface of light guide plate 2 respectively.
Fig. 6 is the profile of second embodiment of lightweight backlight module according to the present invention.Wherein, light guide plate 2 has at least one side 26, so that receive the light that is sent from light source 1, and also side 26 is positioned on the position of light source 1.Light itself sends from fluorescent tube 10, and some of them are sent via reflection lampshade 16 reflections, and enter light guide plate 2.
The both sides of light guide plate 2 can be used as the position that light source 1 is set, and light source 1 comprises itself: at least one luminous lamp tube 10 and reflection lampshade 16.
24 positions, reflection horizon own are the tops that are in abutting connection with first surface 22, its major function is to make light 5 after the both sides importing light guide plate 2 of light guide plate 2, if there is the light 50 (medium of advancing of the incident ray 5 of second embodiment of lightweight backlight module of the present invention is a light guide plate 2) that does not directly penetrate light guide plate 2, then owing to the effect of incident ray 5 in the total reflection of the medium inside of advancing, make incident ray 5 reflect downwards, light 50 arrives the reflection horizon 24 of light guide plate 2 after a while, and 24 reflection of layer that are reflected.Afterwards, light 50 later by and leave light guide plate 2, light guide plate 2 can be strengthened the brightness of display whereby.
Second embodiment of lightweight backlight module of the present invention is characterised in that: light guide plate 2 itself is shunk indent from first surface 22, and its transverse section can be rendered as a summary arc.In this way, second embodiment of lightweight backlight module of the present invention can reduce the overall weight of light guide plate 2.The narrowest place of depth of the transverse section of the light guide plate 2 of second embodiment of the invention is positioned at the middle part of light guide plate 2 transverse section, and its scope is between 4 to 6 millimeters (mm).Depth the widest part of the transverse section of light guide plate 2 is positioned at the end of the transverse section of light guide plate 2, and its scope is between 6 to 8 millimeters (mm).
The feature of second embodiment of lightweight backlight module of the present invention also is: a plurality of microminiature cups 240 are positioned on the reflection horizon 24, thereby make reflection horizon 24 can have unique different reflecting effect, the main foundation of the calculating of this reflecting effect department nile law (Snell ' s law).The cup 240 of second embodiment of lightweight backlight module of the present invention presents the form of semi-round ball 244, and Fig. 6 shows its vertical view in the amplification mode.
The feature of second embodiment of lightweight backlight module of the present invention also is: arrange a plurality of fluorescent tubes 10 in the storehouse mode, fluorescent tube 10 positions own are the arbitrary ends in light guide plate 2, thereby become the part of light source 1.
The feature of second embodiment of lightweight backlight module of the present invention also is: the reflection lampshade 16 that has corresponding radian and light gathering is arranged can be set, and this calculating that the corresponding radian of light gathering reflection lampshade arranged mainly also is according to department's nile law (Snell ' s law).Having corresponding radian and the position of the reflection lampshade 16 of light gathering is arranged is arbitrary end in light guide plate 2.From the light that fluorescent tube 10 sent 5 of light source 1 via having corresponding radian after the reflection lampshade 16 of light gathering is arranged, owing to can design the reflection direction of light 5 in advance, so the light 5 that can effectively light source 1 be sent imports light guide plate 2 to greatest extent, thereby becomes light 52.
Fig. 7 is the side perspective view of second embodiment of lightweight backlight module according to the present invention.Having corresponding radian and the position of the reflection lampshade 16 of light gathering is arranged is arbitrary end in light guide plate 2.After the reflection lampshade 16 of light gathering is arranged, can penetrate side 26 via having corresponding radian to greatest extent from the light 5 that fluorescent tube 10 sent.24 positions, reflection horizon own are positioned in abutting connection with the top of first surface 22.
More than given accompanying drawing and explanation be preferred embodiment of the present invention only, be not to be used to limit enforcement of the present invention.Any variation or modification that those skilled in the art makes according to spirit of the present invention all should be encompassed within protection scope of the present invention.
Claims (8)
1. lightweight backlight module comprises:
Light source, this light source is used to provide light, information is shown on the LCD;
Reflection lampshade is used to reflect the light that this light source sends;
Light guide plate, this light guide plate has an output surface, at least one first surface and a reflection horizon, this output surface be positioned at opposing face to and be parallel to a side of panel of LCD, and this output surface and this first surface constitute the upper and lower surface of this light guide plate respectively, and this light guide plate has at least one side, to be received from the light that this light source sends, this side is positioned on the position of this light source; This reflection horizon is positioned at the top in abutting connection with this first surface, so that after light is directed in this light guide plate from the both sides of this light guide plate, the existing non-light that directly penetrates this light guide plate will reflect downwards because of inner full-reflection, and arrive this reflection horizon of this light guide plate, thereby reflected by this reflection horizon and leave this light guide plate by output surface;
A plurality of hypomegetic cups are positioned on this reflection horizon;
It is characterized in that:
This light guide plate is shunk indent from this first surface;
A plurality of fluorescent tubes of arranging in the storehouse mode are positioned at arbitrary end of this light guide plate, and these a plurality of fluorescent tubes constitute light sources; And
Have radian and have the reflection lampshade of light gathering to be positioned at arbitrary end of this light guide plate, this has radian and has the reflection lampshade of light gathering to cooperate the light reflection direction of design in advance, thereby will import light guide plate by the light that light source sends.
2. lightweight backlight module as claimed in claim 1, it is characterized in that, this light source can be arranged at the both sides of this light guide plate, it comprises: an at least one fluorescent tube and a reflection lampshade, this fluorescent tube can emit beam, and this reflection lampshade can reflect the light that this fluorescent tube sends, thereby forms the light by light source sent.
3. lightweight backlight module as claimed in claim 1 is characterized in that the narrowest place of depth of this light guide plate transverse section is positioned at the middle part of this light guide plate transverse section, its scope between 4mm between the 6mm.
4. lightweight backlight module as claimed in claim 1 is characterized in that depth the widest part of this light guide plate transverse section is positioned at the end of this light guide plate transverse section, its scope between 6mm between the 8mm.
5. lightweight backlight module as claimed in claim 1 is characterized in that this cup can be semi-round ball.
6. lightweight backlight module as claimed in claim 1 is characterized in that this cup can be the shrinkage pool with multiple faceted pebble.
7. lightweight backlight module as claimed in claim 1 is characterized in that, this light guide plate is shunk indent from this first surface, and presents curved transverse section.
8. lightweight backlight module as claimed in claim 1 is characterized in that, this light guide plate is shunk indent from this first surface, and its transverse section can present the wedge shape invaginated type that a plurality of line segments approach.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02158376 CN1227562C (en) | 2002-12-30 | 2002-12-30 | Light weight back light module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02158376 CN1227562C (en) | 2002-12-30 | 2002-12-30 | Light weight back light module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1512231A CN1512231A (en) | 2004-07-14 |
| CN1227562C true CN1227562C (en) | 2005-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02158376 Expired - Lifetime CN1227562C (en) | 2002-12-30 | 2002-12-30 | Light weight back light module |
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| Country | Link |
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| CN (1) | CN1227562C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012006808A1 (en) * | 2010-07-14 | 2012-01-19 | 深圳市华星光电技术有限公司 | Backlight module |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100419536C (en) * | 2005-12-05 | 2008-09-17 | 群康科技(深圳)有限公司 | Back-light module group and liquid crystal display apparatus |
| CN101126866B (en) * | 2006-08-17 | 2010-12-29 | 奇美电子股份有限公司 | Direct type backlight module and liquid crystal display comprising the backlight module |
| US7780330B2 (en) * | 2007-05-16 | 2010-08-24 | Rohm And Haas Electronics Materials Llc | Elongated illuminators configuration for LCD displays |
| CN103017036B (en) * | 2012-12-11 | 2015-12-23 | 京东方科技集团股份有限公司 | A kind of light-emitting device, backlight module and display device |
| US10371884B2 (en) | 2014-08-04 | 2019-08-06 | Dolby Laboratories Licensing Corporation | Tiled assemblies for a high dynamic range display panel |
-
2002
- 2002-12-30 CN CN 02158376 patent/CN1227562C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012006808A1 (en) * | 2010-07-14 | 2012-01-19 | 深圳市华星光电技术有限公司 | Backlight module |
| US8730150B2 (en) | 2010-07-14 | 2014-05-20 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Backlight module |
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| Publication number | Publication date |
|---|---|
| CN1512231A (en) | 2004-07-14 |
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Owner name: YOUDA PHOTOELECTRIC CO., LTD. Free format text: FORMER NAME OR ADDRESS: GUANGHUI ELECTRONIC CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: Hsinchu, Taiwan, China Patentee after: AU OPTRONICS Corp. Address before: Taiwan, China Patentee before: QUANTA DISPLAY INCORPORATION |
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Granted publication date: 20051116 |
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