CN100460959C - Backlight module and LCD using same - Google Patents
Backlight module and LCD using same Download PDFInfo
- Publication number
- CN100460959C CN100460959C CNB2006100738088A CN200610073808A CN100460959C CN 100460959 C CN100460959 C CN 100460959C CN B2006100738088 A CNB2006100738088 A CN B2006100738088A CN 200610073808 A CN200610073808 A CN 200610073808A CN 100460959 C CN100460959 C CN 100460959C
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- light emitting
- emitting diode
- light
- backlight module
- row
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- 238000007598 dipping method Methods 0.000 claims description 28
- 239000003086 colorant Substances 0.000 claims description 6
- 238000005282 brightening Methods 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 claims description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
- 239000000084 colloidal system Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 230000000295 complement effect Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001795 light effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
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Abstract
Wherein, the module comprises a light guide plate with a light-output top surface and a light-input side surface, and at least one first and second LEDs both arranged on former side surface. Wherein, arranging the second LED under the first one and both of them parallel the normal direction of former top surface.
Description
Technical field
The invention relates to a kind of backlight module and use its liquid crystal indicator, and particularly be arranged on by the light guide plate about a kind of light emitting diode vicinity that has two homeotropic alignments at least.
Background technology
(light emitting diode LED) has that driving voltage lowly, low pollutes, in light weight, advantage such as volume is little, has become one of main light source of backlight module in the following liquid crystal indicator because light emitting diode.And traditionally for the light source of tool high color saturation is provided, the LED colour mixture how to form with row red (R), green (G) and blue (B) three kinds of color alignment becomes white light source, and backlight as display panels in the liquid crystal indicator is provided.In order to improve optical efficiency,, often adopt V cut light guide plate to increase emitting brightness in addition to reduce the quantity of power and LED.
Yet when tradition was arranged in the illuminated backlight module of side with the LED of row R, G, a B, each LED sent had the coloured light segment distance of need advancing in light guide plate just can be uniformly mixed into white light, causes this section colour mixture zone to can't bear to use.Especially at present be particular about under light, thin, short, the little requirement for the liquid crystal flat display apparatus, the featheredge (slim border) with frivolous frame becomes the main flow on the market gradually.Therefore how to reduce the colour mixture zone and just become the important key that can the LED-backlit module become commercial application.
Summary of the invention
In view of this, purpose of the present invention is exactly a kind of backlight module to be provided and to use its liquid crystal indicator.At least two light emitting diodes are vertically arranged in the side of light guide plate, the colour mixture zone that can effectively reduce light guide plate, the area that makes light guide plate can send equal white light significantly increases.
According to purpose of the present invention, a kind of backlight module is proposed, comprise light guide plate, at least one first light emitting diode and at least one second light emitting diode.Light guide plate has bright dipping end face and light incident sides, and first light emitting diode and second light emitting diode are all contiguous to be arranged on by the light incident sides.Second light emitting diode is positioned at first light emitting diode below, and first light emitting diode and second light emitting diode are arranged with the normal direction that is parallel to the bright dipping end face in fact.
According to another object of the present invention, a kind of liquid crystal indicator is proposed, comprise display panels and backlight module.Backlight module is positioned under the display panels, comprises light guide plate, at least one first light emitting diode and at least one second light emitting diode.Light guide plate has bright dipping end face and light incident sides, and first light emitting diode and second light emitting diode are all contiguous to be arranged on by the light incident sides.Second light emitting diode is positioned at first light emitting diode below, and first light emitting diode and second light emitting diode are arranged with the normal direction that is parallel to the bright dipping end face in fact.
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, be described in detail below:
Description of drawings
Fig. 1 illustrates the synoptic diagram of a kind of liquid crystal indicator of the present invention;
Fig. 2 illustrates the synoptic diagram of another kind of LCD of the present invention;
Fig. 3 illustrates the synoptic diagram that ruddiness, green glow and three kinds of chips of blue light merge the light emitting diode of encapsulation; And
Fig. 4 illustrates the decomposition diagram of Fig. 1.
The primary clustering symbol description
100: liquid crystal indicator
120: display panels
140: backlight module
141: light guide plate
142: the bright dipping end face
143: light incident sides
144: the bottom surface
145:V type groove
146: reflector plate
147: blooming piece
151: the first row light emitting diodes
152: the secondary series light emitting diode
153: the three row light emitting diodes
300: light emitting diode
310: colloid
320: the red light-emitting diode chip
330: the green light LED chip
340: blue LED chip
Embodiment
Please be simultaneously with reference to Fig. 1 and Fig. 4, it illustrates the synoptic diagram of a kind of liquid crystal indicator of the present invention respectively, and the decomposition diagram of Fig. 1.Liquid crystal indicator 100 comprises display panels 120 and backlight module 140.Backlight module 140 is positioned under the display panels 120, comprises light guide plate 141, the first row light emitting diode 151, secondary series light emitting diode 152 and the 3rd row light emitting diode 153.Light guide plate 141 has bright dipping end face 142 and all contiguous light incident sides 143 sides that are arranged on of light incident sides 143, the first row light emitting diodes 151, secondary series light emitting diode 152 and the 3rd row light emitting diode 153.Secondary series light emitting diode 152 is positioned at the first row light emitting diode, 151 belows, and the 3rd row light emitting diode 153 is positioned at secondary series light emitting diode 152 belows again.The first row light emitting diode 151, secondary series light emitting diode 152 and the 3rd row light emitting diode 153 are arranged with the direction of the normal N that is parallel to bright dipping end face 142 in fact.In the present embodiment, each light emitting diode of the first row light emitting diode 151, secondary series light emitting diode 152 and the 3rd row light emitting diode 153 has colloid respectively, have a redness, green or blue led chips in the colloid separately, can send ruddiness (R), green glow (G) and blue light (B) respectively.But the homeotropic alignment of ruddiness, green glow and blue light can change not influence scope of the present invention in proper order, that is to say that first row, secondary series and the 3rd row light emitting diode can comprise arrangement modes such as RBG, GRB, GBR, BRG or BGR equally.
Please refer to Fig. 2, it illustrates the synoptic diagram of the another kind of LCD of the present invention.The main difference part of LCD 200 and LCD 100 is the arrangement mode of LED.Light emitting diode 250 also is arranged in three row, is spaced in regular turn but the LED of each row is R, G, B, and neighbouring LED also is a different colours simultaneously.Therefore this kind LED arrangement mode can reach better mixed light effect.Remaining component continues to continue to use its label with LCD 100 identical persons.
The bright dipping end face 142 or the bottom surface 144 of light guide plate 141 can have a plurality of V-grooves, form so-called V-cut light guide plate.Bottom surface 144 is relative with bright dipping end face 142, and light incident sides 143 connects bright dipping end face 142 and bottom surface 144.Present embodiment is that to have a plurality of V-grooves 145 with bottom surface 144 be that example is done explanation, yet V-groove also can be formed on the bright dipping end face 142 at the same time or separately.Adopt the light guide plate of V-cut the angle of bright dipping can be concentrated in the small range, make audience receive more light and the perceived brightness raising in the face of display panels 120.The bearing of trend of V-groove 145 can be parallel or perpendicular to light incident sides 143, and present embodiment is that the bearing of trend with V-groove 145 is that example is done explanation perpendicular to light incident sides 143.In addition, present embodiment comprises also a blooming piece 147 is attached on the bright dipping end face 142 of light guide plate 141 that blooming piece 147 comprises diffusion sheet, brightening piece or prismatic lens, can make bright dipping evenly or improve emitting brightness.In addition, reflector plate 146 is attached on the bottom surface 144 of light guide plate 141, backlight module 140 between display panels 120 and reflector plate 146, reflector plate 146 in order to reflection source to improve emitting brightness.
Usually know the knowledgeable yet the technical field under the present invention has, technology of the present invention as can be known is not limited thereto.In fact, it is other only to need at least one first light emitting diode and at least one second light emitting diode vicinity to be arranged on light incident sides 143, first light emitting diode and second light emitting diode are arranged with the normal N direction that is parallel to bright dipping end face 142 in fact, promptly belong to scope of the present invention.
In addition, each first row light emitting diode, secondary series light emitting diode or the 3rd row light emitting diode can be with ruddiness, green glow and three kinds of Chip Packaging of blue light together.Please refer to Fig. 3, it illustrates the synoptic diagram that ruddiness, green glow and three kinds of chips of blue light merge the light emitting diode of encapsulation.Light emitting diode 300 comprises colloid 310, has red light-emitting diode chip 320, green light LED chip 330 and blue LED chip 340 in the colloid 310, and each light-emitting diode chip for backlight unit exposes pin more separately outside colloid 310.Because each light emitting diode 300 is packaged together the light-emitting diode chip for backlight unit of three kinds of colors, can make mixed light more efficient, helps reducing of mixed light zone.
Or liquid crystal indicator only has one first a row light emitting diode and a secondary series light emitting diode.For instance, the first row light emitting diode and secondary series light emitting diode send green glow and purple light respectively, or send purple light and green glow respectively, and two kinds of complementary colors also can be mixed into white light; Also or, the first row light emitting diode and secondary series light emitting diode send blue light and gold-tinted respectively, or send gold-tinted and blue light respectively; Or be that the first row light emitting diode and secondary series light emitting diode send ruddiness and blue or green light respectively, or send blue or green light and ruddiness respectively.As long as the LED of two kinds of colors can be mixed into white light, and the normal N direction that two kinds of LED are parallel to bright dipping end face 142 is arranged in contiguous light incident sides 143 places, promptly belongs to scope of the present invention.The arrangement mode of the light emitting diode 250 of LCD 200 that also can similar Fig. 2 is spaced the LED of two complementary colors in regular turn, reaches better mixed light effect.
In addition, can distinguish on bright dipping end face 142 and the bottom surface 144 or form the site simultaneously, or handle, to increase the effect of bright dipping with sand-blast.
The disclosed backlight module of the above embodiment of the present invention and use its liquid crystal indicator is that the normal N direction that at least two LED are parallel to bright dipping end face 142 is arranged in contiguous light incident sides 143 places.When the color of two kinds of LED not simultaneously, this kind arrangement mode can make the mixed light zone reduce greatly, and the utilizable lighting area of light guide plate is greatly increased.
In sum, though the present invention with a preferred embodiment openly as above, so it is not in order to limit the present invention.The persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (10)
1. backlight module comprises:
One light guide plate has a bright dipping end face and a light incident sides; And
The first row light emitting diode and secondary series light emitting diode, all contiguous being arranged on by this light incident sides, this secondary series light emitting diode is positioned at this first row light emitting diode below, this first row light emitting diode and this secondary series light emitting diode are arranged with the normal direction that is parallel to this bright dipping end face in fact, and the neighbouring light emitting diode adjacent with the left and right sides sends the light of different colours.
2. backlight module according to claim 1, it is characterized in that, also comprise the 3rd row light emitting diode, the 3rd row light emitting diode is positioned at this secondary series light emitting diode below, this first row light emitting diode, this secondary series light emitting diode and the 3rd row light emitting diode are arranged with the normal direction that is parallel to this bright dipping end face in fact, and this first row light emitting diode, this secondary series light emitting diode and the 3rd row light emitting diode are spaced in regular turn by three kinds of light emitting diodes that send ruddiness, green glow and blue light respectively and form.
3. backlight module according to claim 1 is characterized in that, this first row light emitting diode and this secondary series light emitting diode are spaced in regular turn by two kinds of light emitting diodes that send green glow and purple light respectively and form.
4. backlight module according to claim 1 is characterized in that, this first row light emitting diode and this secondary series light emitting diode are spaced in regular turn by two kinds of light emitting diodes that send blue light and gold-tinted respectively and form.
5. backlight module according to claim 1 is characterized in that, this first row light emitting diode and this secondary series light emitting diode are spaced in regular turn by two kinds of light emitting diodes that send ruddiness and blue or green light respectively and form.
6. backlight module according to claim 1, it is characterized in that this light guide plate also has a bottom surface, this bottom surface is relative with this bright dipping end face, and this light incident sides connects this bright dipping end face and this bottom surface, and this bright dipping end face and/or this bottom surface of light guide plate have a plurality of V-grooves.
7. backlight module according to claim 6 is characterized in that, the bearing of trend of those V-grooves is parallel or perpendicular to this light incident sides.
8. backlight module according to claim 1 is characterized in that, also comprises a blooming piece, is arranged on this bright dipping end face of this light guide plate.
9. backlight module according to claim 8 is characterized in that, this blooming piece comprises a diffusion sheet, a brightening piece or a prismatic lens.
10. backlight module according to claim 1 is characterized in that, also comprises a reflector plate, is arranged on the bottom surface of this light guide plate, and this bottom surface is relative with this bright dipping end face, and this light incident sides connects this bright dipping end face and this bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100738088A CN100460959C (en) | 2006-03-30 | 2006-03-30 | Backlight module and LCD using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100738088A CN100460959C (en) | 2006-03-30 | 2006-03-30 | Backlight module and LCD using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1828391A CN1828391A (en) | 2006-09-06 |
| CN100460959C true CN100460959C (en) | 2009-02-11 |
Family
ID=36946857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100738088A Expired - Fee Related CN100460959C (en) | 2006-03-30 | 2006-03-30 | Backlight module and LCD using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100460959C (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003215346A (en) * | 2002-01-18 | 2003-07-30 | Citizen Electronics Co Ltd | Light guide plat |
| CN1627152A (en) * | 2003-12-11 | 2005-06-15 | 鸿富锦精密工业（深圳）有限公司 | Light guiding plate |
| JP2005310751A (en) * | 2004-03-24 | 2005-11-04 | Matsushita Electric Ind Co Ltd | Lighting system |
| CN1700067A (en) * | 2004-05-19 | 2005-11-23 | 索尼株式会社 | Backlight apparatus and liquid crystal display apparatus |
| CN1702523A (en) * | 2004-05-24 | 2005-11-30 | 株式会社日立显示器 | Display device and backlight device |
| US6975370B2 (en) * | 2002-12-13 | 2005-12-13 | Hon Hai Precision Ind. Co., Ltd | Backlight system and liquid crystal display using the same |
-
2006
- 2006-03-30 CN CNB2006100738088A patent/CN100460959C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003215346A (en) * | 2002-01-18 | 2003-07-30 | Citizen Electronics Co Ltd | Light guide plat |
| US6975370B2 (en) * | 2002-12-13 | 2005-12-13 | Hon Hai Precision Ind. Co., Ltd | Backlight system and liquid crystal display using the same |
| CN1627152A (en) * | 2003-12-11 | 2005-06-15 | 鸿富锦精密工业（深圳）有限公司 | Light guiding plate |
| JP2005310751A (en) * | 2004-03-24 | 2005-11-04 | Matsushita Electric Ind Co Ltd | Lighting system |
| CN1700067A (en) * | 2004-05-19 | 2005-11-23 | 索尼株式会社 | Backlight apparatus and liquid crystal display apparatus |
| CN1702523A (en) * | 2004-05-24 | 2005-11-30 | 株式会社日立显示器 | Display device and backlight device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1828391A (en) | 2006-09-06 |
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| PB01 | Publication | ||
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| 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: 20090211 |