CN1301433C - Backlight modular - Google Patents
Backlight modular Download PDFInfo
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- CN1301433C CN1301433C CNB2004100334032A CN200410033403A CN1301433C CN 1301433 C CN1301433 C CN 1301433C CN B2004100334032 A CNB2004100334032 A CN B2004100334032A CN 200410033403 A CN200410033403 A CN 200410033403A CN 1301433 C CN1301433 C CN 1301433C
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- light guide
- guide plate
- emitting diode
- backlight module
- light
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Abstract
The present invention relates to a back light module which is suitable for a bifacial display. The bifacial display is provided with two display panels which are arranged in parallel, and a panel gap space is formed between the two display panels. The back light module comprises two light guide plates, a circuit plate and at least one light-emitting diode, wherein the two light guide plates are arranged in the panel gap space and are in parallel with the two display panels, and a light guide plate gap space is formed between the two light guide plates; the circuit plate is clamped in the light guide plate gap space and is arranged on two parallel sides of the two light guide plates; the light-emitting diode is electrically connected with the circuit plate and is protruded out of lateral surfaces of the two light guide plates.
Description
Technical field
The present invention relates to a kind of backlight module (backlight module), particularly relate to and a kind ofly be disposed at that (light emitting diode LED) is the backlight module of light source in the two-sided display and with light emitting diode.
Background technology
Please refer to Fig. 1, it illustrates the sectional view of the backlight module of a traditional unidirectional bright dipping.The backlight module 100 of this unidirectional bright dipping mainly comprises a light guide plate 106, two cold cathode fluorescent lamp (Cold CathodeFluorescent Lamp, CCFL) 102, two fluorescent tube reflecting plates (lamp reflector), 104, one reflecting plates (reflecting plate) 108.Since each cold cathode fluorescent lamp 102 peripheries by 104 of fluorescent tube reflecting plates around, so the light that provided of each cold cathode fluorescent lamp 102 can be by pairing fluorescent tube reflecting plate 104 reflections, and enter in the light guide plate 106 via the two side faces of light guide plate 106.Light guide plate 106 will be guided the even scattering of the light that is received (scatter) to diffuser plate (diffusion plate) 110, and change the path of light once more via prismatic lens (prism plate) 112, make light be directed to display panels (Liquid Crystal Display Panel, LCD Panel) 114, direction shown in arrow among the figure.Yet this kind mode is only had an image output function of single face.
Please refer to Fig. 2, it illustrates the sectional view of a traditional double to the backlight module of bright dipping.The backlight module 200 of this two-way bright dipping mainly comprises a light guide plate 206, two CCFL 202, two fluorescent tube reflecting plates 204, pore pattern (hole patterns) 208.The characteristic of the backlight module 200 of this two-way bright dipping is the built-in pipe sectional hole patterns 208 of light guide plate 206.The light of cold cathode fluorescent lamp 202 can by fluorescent tube reflecting plate 204 reflect and incident light guide plate 206 in.Light guide plate 206 by pore pattern 208 with ray guidance to be positioned at light guide plate 206 just, diffuser plate 210 on the back side, and change the path of light once more via prismatic lens 212, last light can the bright dipping via display panels 214, direction shown in arrow among the figure.
Though this kind mode has the function of two-sided image output light, the same with Fig. 1 is that the two all is light source with CCFL.Use CCFL to be that as the shortcoming of light source its fluorescent tube includes mercuryvapour, do not meet following environmental protection trend.In addition, because CCFL is the tubular structure of slim type, in the process of transporting, CCFL is easy to be subjected to the bump of external force and damages, and increases the risk of the CCFL lost of life on the contrary.In addition, if one of them fluorescent tube rate of ageing is very fast, then the phenomenon of luminance nonuniformity can manifest immediately, and it is very huge to influence the brightness of backlight module quality.
Summary of the invention
In view of this, purpose of the present invention is providing a kind of backlight module exactly, and it is with the design of light emitting diode as light source, can avoid producing the mercury pollution problem that can run into during for light source with CCFL as traditionally, quite meets environmental protection trend.In addition, light emitting diode than CCFL be not vulnerable to external force bump and damage, ensured the serviceable life of the light source in the backlight module.
According to purpose of the present invention, a kind of backlight module is proposed, be applicable to a two-sided display.Display with double faces has the display panel that two flat each other shapes are provided with, and forms a panel gap space between two display panels.Backlight module comprises two light guide plate, a circuit board and at least one light emitting diode.Two light guide plate are arranged in the panel gap space, and parallel with two display panels, form a light guide plate clearance space between two light guide plate.Circuit board is folded in the light guide plate clearance space, and is positioned at the edge of two light guide plate.Light emitting diode is electrically connected on circuit board, and is convexly set in outside the side of two light guide plate.
According to another purpose of the present invention, a kind of backlight module is proposed, be applicable to a two-sided display.Display with double faces has the display panel that two flat each other shapes are provided with, and forms a panel gap space between two display panels.This backlight module comprises one first light guide plate, one second light guide plate, a first circuit board, a second circuit board, one first light emitting diode and one second light emitting diode.First light guide plate and second light guide plate are arranged in the panel gap space, and parallel with two display panels, form a light guide plate clearance space between first light guide plate and second light guide plate.First circuit board and second circuit board are folded in respectively in the light guide plate clearance space, and first circuit board is positioned at an edge of first light guide plate and second light guide plate, and second circuit board is positioned at another edge of first light guide plate and second light guide plate.
First light emitting diode and second light emitting diode are electrically connected on respectively on first circuit board and the second circuit board, first light emitting diode is convexly set in outside the side of first light guide plate and second light guide plate, and second light emitting diode is convexly set in outside the another side of first light guide plate and second light guide plate.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and cooperate appended graphicly, elaborate.In the accompanying drawing:
Fig. 1 illustrates the sectional view of the backlight module of a traditional unidirectional bright dipping.
Fig. 2 illustrates the sectional view of a traditional double to the backlight module of bright dipping.
Fig. 3 A illustrates the sectional view according to the backlight module of the first embodiment of the present invention.
The consitutional part left side view of a plurality of first light emitting diodes that Fig. 3 B illustrates first light guide plate, second light guide plate, first circuit board, two reflecting materials of Fig. 3 A and is in line.
Fig. 4 illustrates the sectional view according to the backlight module of the second embodiment of the present invention.
The simple symbol explanation
100,200,300,400: backlight module
102,202: cold cathode fluorescent lamp
104,204: the fluorescent tube reflecting plate
106,206: light guide plate
108: reflecting plate
110,210: diffuser plate
112,212: prismatic lens
114,214,3011,3012: display panel
208: the pore pattern
301,401: display with double faces
302: the panel gap space
3031: the first light guide plate
3032: the second light guide plate
304: the light guide plate clearance space
3051: first circuit board
3052: second circuit board
3061: the first light emitting diodes
3062: the second light emitting diodes
3081,4021: the first cambered surface reflecting plates
3082,4022: the second cambered surface reflecting plates
3101,3102: 3141: the first optical thin films of reflecting material
3142: the second optical thin films
4041: the first convex surfaces
4042: the second convex surfaces
Embodiment
First embodiment
Please refer to Fig. 3 A, it illustrates is sectional view according to the backlight module of the first embodiment of the present invention.In Fig. 3 A, backlight module 300 is applicable to a two-sided display 301, and display with double faces 301 has display panel 3011 and the display panel 3012 that two flat each other shapes are provided with, and forms a panel gap (gap) space 302 between the display panel 3011 and 3012.Backlight module 300 is disposed in this panel gap space 302, in order to provide display with double faces 301 needed light.
Backlight module 300 comprises one first light guide plate 3031, one second light guide plate 3032, a first circuit board 3051 and at least one first light emitting diode (light emitting diode, LED) 3061 at least.First light guide plate 3031 and second light guide plate 3032 all are arranged in the panel gap space 302, and parallel with display panel 3011 and display panel 3012, and form a light guide plate clearance space 304 between first light guide plate 3031 and second light guide plate 3032.
In addition, backlight module 300 also comprises one first cambered surface reflecting plate 3081 and two reflecting materials 3101 and 3102.The first cambered surface reflecting plate 3081 covers a side of first light emitting diode 3051 and first light guide plate 3031 and second light guide plate 3032 with its concave surface towards the mode of first light emitting diode 3051, in light to the first light guide plate 3031 and second light guide plate 3032 that reflect first light emitting diode 3061.Two reflecting materials 3101 and 3102 are arranged at respectively on the surface of first light guide plate 3031 and second light guide plate 3032 in the mode that is arranged in light guide plate clearance space 304, and two reflecting materials 3101 and 3102 Pastings or coat on the surface of first light guide plate 3031 and second light guide plate 3032.
In the present embodiment, backlight module 300 also comprises a second circuit board 3052, one second light emitting diode 3062 and one second cambered surface reflecting plate 3082.Second circuit board 3052 is folded in the light guide plate clearance space 304, and to be positioned at the dual side-edge in addition parallel to each other of first light guide plate 3031 and second light guide plate 3032 with first circuit board 3051 symmetrical manner.First light guide plate 3031, second light guide plate 3032, first circuit board 3061 and second circuit board 3062 form a quadrilateral structure, and this quadrilateral structure surrounds a heat transmission cavity (chamber).Also can fill a material with high-cooling property and high rigidity in the heat transmission cavity, can dispel the heat on the one hand, can support first light guide plate 3031 and second light guide plate 3032 on the other hand.Second light emitting diode 3062 is electrically connected on second circuit board 3052, and is convexly set in outside the another side of first light guide plate 3031 and second light guide plate 3032.The second cambered surface reflecting plate 3082 covers the side of second light emitting diode 3052 and first light guide plate 3031 and second light guide plate 3032 with its concave surface towards the mode of second light emitting diode 3052, in light to the first light guide plate 3031 and second light guide plate 3032 that reflect second light emitting diode 3062.
Because the concave surface of the first cambered surface reflecting plate 3081 and the second cambered surface reflecting plate 3082 has reflection function, therefore the light that sent of first light emitting diode 3051 and second light emitting diode 3052 can enter first light guide plate 3031 and second light guide plate 3032 side from first light guide plate 3031 and second light guide plate 3032 via the reflection of the first cambered surface reflecting plate 3081 and the second cambered surface reflecting plate 3082.Then, under the reflection action of two reflecting materials 3101 and 3102, first light guide plate 3031 and second light guide plate 3032 will be guided the light that is received and penetrate towards the direction of first optical thin film 3141 and second optical thin film 3142 via the front of first light guide plate 3031 and second light guide plate 3032 respectively.At last, diffusion by first optical thin film 3141 and second optical thin film 3142, to distinguish direct projection display panel 3011 and display panel 3012 by the light of first optical thin film 3141 and second optical thin film 3142, the light direction of the light of its display with double faces 300 reaches the effect of two-sided bright dipping really shown in the direction of arrow among Fig. 3 A.
Yet those skilled in the art can understand that also technology of the present invention is not confined to this, and for example, a plurality of first light emitting diodes 3061 are to be in line or the mode of array is arranged on the first circuit board 3051, shown in Fig. 3 B.In like manner, a plurality of second light emitting diodes 3062 are to be in line or the mode of array is arranged on the first circuit board 3052.These a little first light emitting diodes 3061 and second light emitting diode 3062 can be made up of the light emitting diode of dispersing ruddiness (R), green glow (G) and blue light (B), or all are the light emitting diode of dispersing white light.
Second embodiment
Please refer to Fig. 4, it illustrates is sectional view according to the backlight module of the second embodiment of the present invention.In Fig. 4, the display with double faces difference of the display with double faces 401 and first embodiment is backlight module 400, and backlight module 300 differences of the backlight module 400 of present embodiment and first embodiment are the structure of cambered surface reflecting plate, all the other identical constitutive requirements are continued to use identical label, and repeat no more.
The central authorities of the concave surface of the first cambered surface reflecting plate 4021 have one first convex surface 4041, and first convex surface 4041 is towards first light emitting diode 3061.Similarly, the central authorities of the concave surface of the second cambered surface reflecting plate 4022 have one second convex surface 4042, and second convex surface 4042 is towards second light emitting diode 3062.By the design of first convex surface 4041 and second convex surface 4042, can increase the optical efficiency of going into of first light guide plate 3061 and second light guide plate 3062.
The disclosed backlight module of the above embodiment of the present invention, it is with the design of light emitting diode as light source, can avoid producing the mercury pollution problem that can run into during for light source with CCFL as traditionally, quite meets environmental protection trend.In addition, light emitting diode is not vulnerable to the bump of external force than CCFL and damages, and has ensured the serviceable life of the light source in the backlight module.
In sum; though the present invention discloses as above in conjunction with the preferred embodiments; yet it is not in order to limit the present invention; those skilled in the art without departing from the spirit and scope of the present invention; can do a little change and retouching, thus protection scope of the present invention should with accompanying Claim the person of being defined be as the criterion.
Claims (10)
1. a backlight module is applicable to a two-sided display, and this display with double faces has the display panel that two flat each other shapes are provided with, and forms a panel gap space between this two display panel, and this backlight module comprises:
Two light guide plate are arranged in this panel gap space, and parallel with this two display panel, form a light guide plate clearance space between this two light guide plate;
One circuit board is folded in the edge of this two light guide plate in the mode that is arranged in this light guide plate clearance space; And
At least one light emitting diode is electrically connected on this circuit board, and is convexly set in outside the side of this two light guide plate.
2. backlight module as claimed in claim 1, wherein this circuit board and this two light guide plate form a U font structure.
3. backlight module as claimed in claim 1, wherein this backlight module also comprises:
One cambered surface reflecting plate covers the side of this light emitting diode and this two light guide plate with its concave surface towards the mode of this light emitting diode, in order to the light that reflects this light emitting diode to this two light guide plate.
4. backlight module as claimed in claim 3, wherein the central authorities of the concave surface of this cambered surface reflecting plate have a convex surface, and this convex surface is towards this light emitting diode.
5. backlight module as claimed in claim 1, wherein this backlight module also comprises:
Two reflecting materials are arranged at respectively on the surface of this two light guide plate in the mode that is arranged in this light guide plate clearance space.
6. a backlight module is applicable to a two-sided display, and this display with double faces has the display panel that two flat each other shapes are provided with, and forms a panel gap space between this two display panel, and this backlight module comprises:
One first light guide plate and one second light guide plate are arranged in this panel gap space, and parallel with this two display panel, form a light guide plate clearance space between this first light guide plate and this second light guide plate;
One first circuit board and a second circuit board are folded in this light guide plate clearance space, and this first circuit board is positioned at an edge of this two light guide plate, and this second circuit board is positioned at another edge of this two light guide plate; And
One first light emitting diode and one second light emitting diode, be electrically connected on respectively on this first circuit board and this second circuit board, this first light emitting diode is convexly set in outside the side of this first light guide plate and this second light guide plate, and this second light emitting diode is convexly set in outside the another side of this first light guide plate and this second light guide plate.
7. backlight module as claimed in claim 6, wherein this backlight module also comprises:
One first cambered surface reflecting plate covers this side of this first light emitting diode and this first light guide plate and this second light guide plate with its concave surface towards the mode of this first light emitting diode, in order to the light that reflects this first light emitting diode to this two light guide plate.
8. backlight module as claimed in claim 7, wherein the central authorities of the concave surface of this first cambered surface reflecting plate have one first convex surface, and this first convex surface is towards this first light emitting diode.
9. backlight module as claimed in claim 7, wherein this backlight module also comprises:
One second cambered surface reflecting plate, cover this side in addition of this second light emitting diode and this first light guide plate and this second light guide plate with its concave surface towards the mode of this second light emitting diode, in order to the light that reflects this second light emitting diode to this first light guide plate and this second light guide plate.
10. backlight module as claimed in claim 9, wherein the central authorities of the concave surface of this second cambered surface reflecting plate have one second convex surface, and this second convex surface is towards this second light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100334032A CN1301433C (en) | 2004-04-07 | 2004-04-07 | Backlight modular |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100334032A CN1301433C (en) | 2004-04-07 | 2004-04-07 | Backlight modular |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1564065A CN1564065A (en) | 2005-01-12 |
| CN1301433C true CN1301433C (en) | 2007-02-21 |
Family
ID=34481339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100334032A Expired - Fee Related CN1301433C (en) | 2004-04-07 | 2004-04-07 | Backlight modular |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1301433C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100458528C (en) * | 2007-08-09 | 2009-02-04 | 友达光电股份有限公司 | Back light module group |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104950517A (en) * | 2015-07-15 | 2015-09-30 | 深圳市华星光电技术有限公司 | Double-sided display |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04329516A (en) * | 1991-04-30 | 1992-11-18 | Koufu Nippon Denki Kk | Customer display device |
| JP2000340019A (en) * | 1999-05-31 | 2000-12-08 | Nec Home Electronics Ltd | Backlight device |
| CN1356584A (en) * | 2000-11-25 | 2002-07-03 | 现代显示器科技公司 | Both-surface light output type back lighting part for LCD |
| CN1403852A (en) * | 2001-09-06 | 2003-03-19 | 精工爱普生株式会社 | Light conduction apparatus, electro-optical device and electronic equipment |
| US20030184990A1 (en) * | 2002-03-26 | 2003-10-02 | Chia-Feng Lin | Light-guiding plate module of high reliability |
| JP2004078239A (en) * | 2003-09-26 | 2004-03-11 | Sanyo Electric Co Ltd | Liquid crystal module |
| CN1482498A (en) * | 2002-09-10 | 2004-03-17 | 统宝光电股份有限公司 | Back light module for liquid crystal display |
-
2004
- 2004-04-07 CN CNB2004100334032A patent/CN1301433C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04329516A (en) * | 1991-04-30 | 1992-11-18 | Koufu Nippon Denki Kk | Customer display device |
| JP2000340019A (en) * | 1999-05-31 | 2000-12-08 | Nec Home Electronics Ltd | Backlight device |
| CN1356584A (en) * | 2000-11-25 | 2002-07-03 | 现代显示器科技公司 | Both-surface light output type back lighting part for LCD |
| CN1403852A (en) * | 2001-09-06 | 2003-03-19 | 精工爱普生株式会社 | Light conduction apparatus, electro-optical device and electronic equipment |
| US20030184990A1 (en) * | 2002-03-26 | 2003-10-02 | Chia-Feng Lin | Light-guiding plate module of high reliability |
| CN1482498A (en) * | 2002-09-10 | 2004-03-17 | 统宝光电股份有限公司 | Back light module for liquid crystal display |
| JP2004078239A (en) * | 2003-09-26 | 2004-03-11 | Sanyo Electric Co Ltd | Liquid crystal module |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100458528C (en) * | 2007-08-09 | 2009-02-04 | 友达光电股份有限公司 | Back light module group |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1564065A (en) | 2005-01-12 |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20070221 Termination date: 20210407 |