CN100476537C - Back-light module and liquid crystal display - Google Patents
Back-light module and liquid crystal display Download PDFInfo
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- CN100476537C CN100476537C CNB2005101242598A CN200510124259A CN100476537C CN 100476537 C CN100476537 C CN 100476537C CN B2005101242598 A CNB2005101242598 A CN B2005101242598A CN 200510124259 A CN200510124259 A CN 200510124259A CN 100476537 C CN100476537 C CN 100476537C
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- adhesive tape
- light
- backlight module
- framework
- guide plate
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Abstract
The invention is a backlight module, comprising frame, light reflecting adhesive tape, fixing adhesive tape, reflecting plate, light guide plate and at least a light source device, where one side of the frame has groove; the light reflecting adhesive tape is arranged in the groove; the fixing adhesive tape is arranged on the side of the frame and located on the light reflecting adhesive tape; the reflecting plate is arranged in the frame and is a gap apart from the fixing adhesive tape, and the gap is above the light reflecting adhesive tape; the light guide plate is arraged in the frame and located on the reflecting plate and the fixing adhesive tape and has at least a light incoming surface; and the light source device is arranged by the light incoming surface. And the backlight module can provide uniform plane light source.
Description
Technical field
The present invention relates to a kind of backlight module (Backlight Module) and LCD (LiquidCrystal Display, and be particularly related to and a kind ofly can provide the backlight module of uniform surface light source (planarlight source) and the LCD of using this backlight module LCD).
Background technology
Along with the modern video development of technology, video-unit is gradually towards trend development such as in light weight, that size is big and panel is thin.Cooperate the flat-panel screens (FlatPanel Display) that photoelectricity and semiconductor fabrication developed, for example LCD (LCD), display of organic electroluminescence (OrganicElectro-Luminescence Display, OLED) or plasma display (Plasma DisplayPanel, PDP), become the main flow of display product gradually.In recent years, display screen on most mobile phone, digital camera, digital code camera, notebook and the desk-top computer is a main flow with display panels (LCD Panel) all, but because display panels itself does not have luminous function, so below display panels, must provide backlight module (BackLight Module) usually so that the required area source of display panels (planar light source) to be provided.
Fig. 1 is a kind of stereographic map of known backlight module.Please refer to Fig. 1, this backlight module 100 comprises framework 110, fixation adhesive tape 120, reflecting plate 130, light guide plate 140 and light supply apparatus 150.Fixation adhesive tape 120 is arranged at the side 112 of framework 110.Reflecting plate 130 is arranged in the framework 110.Light guide plate 140 is arranged in the framework 110, and is positioned on reflecting plate 130 and the fixation adhesive tape 120, and light guide plate 140 has incidence surface 142.Light supply apparatus 150 is arranged at incidence surface 142 sides of light guide plate 140.In addition, as shown in Figure 1, on light guide plate 140, can set gradually light-collecting piece 160 and diffusion sheet 170 blooming pieces such as grade again.
It should be noted that briliancy (brightness), generally can use the light guide plate 140 (prism type light-guiding plate) of prism-type, shown in the partial enlarged drawing among Fig. 1 in order to improve backlight module 100.Yet, when the location of the light guide plate 140 of carrying out prism-type, it is not suitable for adopting makes positioning tab (locating protrusion) or unfilled corner (pared corner) on the light guide plate 140 of prism-type, and then utilizes positioning tab (not shown) or unfilled corner (not shown) that the light guide plate 140 of prism-type is placed in way on the framework 110.Therefore, generally be to utilize fixation adhesive tape 120 that the light guide plate 140 of prism-type is fixed on mode on the framework 110.But, this mode and can't guarantee the sticking position of each fixation adhesive tape 120 and reflecting plate 130 between have no the gap, that is to say the gap d 1 of may being separated by between fixation adhesive tape 120 and the reflecting plate 130 (being shown among Fig. 2).
Fig. 2 is a diagrammatic cross-section of utilizing the LCD of the backlight module among Fig. 1, and this section is to get along A-A ' line among Fig. 1.Please refer to Fig. 2, backlight module 100 constitutes LCD 300 with display panels 200, and wherein, backlight module 100 can provide area source to display panels 200, and makes it reach the effect of demonstration.But in backlight module 100, because the gap d 1 of being separated by between fixation adhesive tape 120 and reflecting plate 130, so the intensity of the light 190 that is reflected by framework 110 from gap d 1, it will be different from the intensity of the light 192 that the plate 130 that is reflected reflected.Thus, backlight module 100 will be unsuitable for providing uniform surface light source, and on display panels 200 position of corresponding gap d 1, produce as Fig. 2 and the represented brightness disproportionation zone 202 of Fig. 3.
Summary of the invention
In view of the foregoing, purpose of the present invention just provides a kind of backlight module, and it is suitable for providing uniform surface light source.
A further object of the present invention provides a kind of LCD, the uniform surface light source that it utilizes above-mentioned backlight module to provide, and then the display quality of raising LCD.
Based on above-mentioned purpose or other purpose, the present invention proposes a kind of backlight module, and it comprises framework, reflective adhesive tape, fixation adhesive tape, reflecting plate, light guide plate and at least one light supply apparatus.One side of framework has groove.Reflective adhesive tape is arranged in the groove.Fixation adhesive tape is arranged at the side of framework, and is positioned on the reflective adhesive tape.Reflecting plate is arranged in the framework, the gap that wherein is separated by between reflecting plate and the fixation adhesive tape, and the gap is positioned at the top of reflective adhesive tape.Light guide plate is arranged in the framework, and is positioned on reflecting plate and the fixation adhesive tape, and light guide plate has at least one incidence surface.Each light supply apparatus is arranged at respectively by the incidence surface of light guide plate.
Based on above-mentioned purpose or other purpose, the present invention reintroduces a kind of LCD, and it comprises backlight module and display panels, and wherein, backlight module comprises framework, reflective adhesive tape, fixation adhesive tape, reflecting plate, light guide plate and at least one light supply apparatus.One side of framework has groove.Reflective adhesive tape is arranged in the groove.Fixation adhesive tape is arranged at the side of framework, and is positioned on the reflective adhesive tape.Reflecting plate is arranged in the framework, the gap that wherein is separated by between reflecting plate and the fixation adhesive tape, and the gap is positioned at the top of reflective adhesive tape.Light guide plate is arranged in the framework, and is positioned on reflecting plate and the fixation adhesive tape, and light guide plate has at least one incidence surface.Each light supply apparatus is arranged at respectively by the incidence surface of light guide plate.Display panels is arranged on the backlight module.
In one embodiment of this invention, above-mentioned reflective adhesive tape is identical with the reflection coefficient (reflection coefficient) of reflecting plate.
In one embodiment of this invention, the material of above-mentioned reflective adhesive tape is to be selected from a kind of in silver, aluminium and the combination thereof.
In one embodiment of this invention, the material of above-mentioned reflecting plate is to be selected from a kind of in silver, aluminium and the combination thereof.
In one embodiment of this invention, above-mentioned light guide plate comprises the prism-type light guide plate.
In one embodiment of this invention, above-mentioned backlight module also comprises optical diaphragm group, and it is arranged in the framework, and is positioned at the top of light guide plate.And optical diaphragm group for example comprises light-collecting piece and diffusion sheet.Light-collecting piece is positioned on the light guide plate, and diffusion sheet is positioned on the light-collecting piece.And light-collecting piece can be the prism-type light-collecting piece.
In one embodiment of this invention, above-mentioned light supply apparatus comprises cathode fluorescent tube or light emitting diode matrix.
In one embodiment of this invention, above-mentioned display panels comprises thin-film transistor array base-plate, colored filter substrate and liquid crystal layer.And liquid crystal layer is between thin-film transistor array base-plate and colored filter substrate.
Backlight module of the present invention is made groove because of adopting at the side of framework, and reflective adhesive tape is arranged at design in the groove, therefore, even be separated by a gap between fixation adhesive tape and the reflecting plate, this moment, emitted light from the gap will be the light that is reflected by reflective adhesive tape.And the brightness meeting of this light is close with the brightness of the light that plate reflected that is reflected.So backlight module of the present invention can provide comparatively uniform surface light source.In addition, utilize that backlight module of the present invention provides than uniform surface light source, can make the LCD of using this backlight module have superior display quality.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is a kind of stereographic map of known backlight module.
Fig. 2 is a diagrammatic cross-section of utilizing the LCD of the backlight module among Fig. 1, and this section is to get along A-A ' line among Fig. 1.
Fig. 3 is the schematic top plan view of the LCD among Fig. 2.
Fig. 4 is the stereographic map of a kind of backlight module in the preferred embodiment of the present invention.
Fig. 4 A is that backlight module among Fig. 4 is along the diagrammatic cross-section of B-B ' line.
Fig. 5 is the diagrammatic cross-section of a kind of LCD in the preferred embodiment of the present invention, and it is the section along the B-B ' line among Fig. 4 A.
The main element description of symbols
100,400: backlight module
110,410: framework
112,412: side
120,430: fixation adhesive tape
130,440: reflecting plate
140,450: light guide plate
142,452a, 452b, 452c, 452d: incidence surface
150,460: light supply apparatus
160,472: light-collecting piece
170,474: diffusion sheet
190,492,494: light
200,500: display panels
202: the brightness disproportionation zone
300,600: LCD
414: groove
420: reflective adhesive tape
470: optical diaphragm group
510: thin-film transistor array base-plate
520: colored optical filtering substrates
530: liquid crystal layer
A-A ', B-B ': profile line
D1, d2: gap
Embodiment
Fig. 4 is the stereographic map of a kind of backlight module in the preferred embodiment of the present invention.Fig. 4 A is that backlight module among Fig. 4 is along the diagrammatic cross-section of B-B ' line.Please jointly with reference to Fig. 4 and Fig. 4 A, this backlight module 400 comprises framework 410, reflective adhesive tape 420, fixation adhesive tape 430, reflecting plate 440, light guide plate 450 and at least one light supply apparatus 460.Wherein, the side 412 of framework 410 has groove 414.Reflective adhesive tape 420 is arranged in the groove 414.Fixation adhesive tape 430 is arranged at the side 412 of framework 410, and is positioned on the reflective adhesive tape 420.Reflecting plate 440 is arranged in the framework 410, the gap d 2 of wherein being separated by between reflecting plate 440 and the fixation adhesive tape 430, and gap d 2 is positioned at the top of reflective adhesive tape 420.Light guide plate 450 is arranged in the framework 410, and is positioned on reflecting plate 440 and the fixation adhesive tape 430, and light guide plate 450 has at least one incidence surface 452a.Light supply apparatus 460 is provided with by the incidence surface 452a of light guide plate 450.
Please refer to the partial enlarged drawing among Fig. 4, this light guide plate 450 can be the prism-type light guide plate.Therefore, light guide plate 450 can be utilized the principle of prism, makes the light of advancing in light guide plate 450 can form area source effectively, and and then improves the briliancy of area source.Particularly, light guide plate 450 is not that light is entered in it from incidence surface 452a, and this light guide plate 450 also can utilize other three sides to be used as incidence surface 452b, 452c, 452d.Thus, just a plurality of light supply apparatuses 460 (only representing among Fig. 4) can be arranged at respectively by incidence surface 452b, 452c, the 452d, and then the brightness that improves area source effectively.In one embodiment of this invention, light supply apparatus 460 can be cathode fluorescent tube (Cold Cathode Fluorescent Lamp, CCFL) or light emitting diode matrix (Light Emitting Diode Array, LED array).
In addition, represented as Fig. 4 and Fig. 4 A, in one embodiment of this invention, backlight module 400 also comprises optical diaphragm group 470, and it is arranged in the framework 410, and is positioned at the top of light guide plate 450.And optical diaphragm group 470 for example comprises light-collecting piece 472 and diffusion sheet 474.Light-collecting piece 472 is positioned on the light guide plate 450, and diffusion sheet 474 is positioned on the light-collecting piece 472.This light-collecting piece 472 can be the prism-type light-collecting piece, and as represented among Fig. 4 A, it utilizes the characteristic of prism, light at random is concentrated in the scope at predetermined angular (about 70 degree angles), to increase the utilization factor of light.Afterwards, light makes its even scattering by diffusion sheet 474 again, and then obtains uniform surface light source.
It should be noted that in backlight module 400 of the present invention framework 410 places of gap d 2 belows between fixation adhesive tape 430 and reflecting plate 440 have made groove 414 in advance.Then, more reflective adhesive tape 420 is arranged in this groove 414, so, the light 492 that from gap d 2, penetrates, it is reflected by reflective adhesive tape 420.
Particularly, in one embodiment of this invention, reflective adhesive tape 420 is identical with the reflection coefficient (reflection coefficient) of reflecting plate 440, and the material of reflective adhesive tape 420 for example is to be selected from a kind of in silver, aluminium and the combination thereof, and the material of reflecting plate 440 for example is to be selected from a kind of in silver, aluminium and the combination thereof.That is to say that represented as Fig. 4 A, by the light 492 that reflective adhesive tape 420 is reflected, with the light 494 that the plate 440 that is reflected is reflected, both brightness is close.Thus, backlight module 400 of the present invention can solve the problem of the luminance difference that causes because of the gap in the known technology.
In sum, in backlight module 400 of the present invention, even be separated by gap d 2 between fixation adhesive tape 430 and the reflecting plate 440, emitted light 492 from gap d 2 will be the light 492 that is reflected by reflective adhesive tape 420.The brightness meeting of this light 492 is close with the brightness of the light 494 that the plate 440 that is reflected is reflected.Therefore, the problem of the luminance difference that causes because of the gap in the known backlight module 100 can achieve a solution.So backlight module 400 of the present invention can provide uniform surface light source.In addition, utilize backlight module 400 of the present invention, can be produced as follows the good LCD of described display quality.
Fig. 5 is the diagrammatic cross-section of a kind of LCD in the preferred embodiment of the present invention, and it is the section along the B-B ' line among Fig. 4 A.This LCD 600 comprises as Fig. 4 and described backlight module 400 of Fig. 4 A and display panels 500.Because the member of this backlight module 400 is described in above-mentioned explanation, so will do not repeated at this.Display panels 500 is arranged on the backlight module 400, and this display panels 500 comprises thin-film transistor array base-plate 510, colored filter substrate 520 and liquid crystal layer 530.And this liquid crystal layer 530 is between thin-film transistor array base-plate 510 and colored filter substrate 520.This display panels 500 sees through the area source that backlight module 400 is provided, and reaches the effect of demonstration.
Side 412 places that it should be noted that the framework 410 of backlight module 400 are provided with groove 414, and reflective adhesive tape 420 is set in groove 414.Therefore, even be separated by gap d 2 between fixation adhesive tape 430 and the reflecting plate 440, the light 492 that penetrates from gap d 2 will be the light 492 that is reflected by reflective adhesive tape 420, and the brightness of the light 494 that reflected of the brightness meeting of light 492 and the plate 440 that is reflected is close.Therefore, this backlight module 400 can provide more uniform surface light source, and improves the display quality of LCD 600.
In sum, Backlight module and liquid crystal display of the present invention has following advantage:
Backlight module of the present invention is made groove because of adopting at the side of framework, and reflective adhesive tape is arranged at design in the groove, therefore, even be separated by a gap between fixation adhesive tape and the reflecting plate, this moment, emitted light from the gap will be the light that is reflected by reflective adhesive tape, and its brightness will be close with the brightness of the light that plate reflected that is reflected.So backlight module of the present invention can provide more uniform surface light source.In addition, utilize that backlight module of the present invention provides than uniform surface light source, can make the LCD of using this backlight module have superior display quality.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any person of ordinary skill in the field; without departing from the spirit and scope of the present invention; when can doing a little change and improvement, so protection scope of the present invention is as the criterion when looking the claim person of defining.
Claims (11)
1. backlight module is characterized in that comprising:
Framework, wherein a side of this framework has groove;
Reflective adhesive tape is arranged in this groove;
Fixation adhesive tape is arranged at this side of this framework, and is positioned on this reflective adhesive tape;
Reflecting plate is arranged in this framework, the gap that wherein is separated by between this reflecting plate and this fixation adhesive tape, and this gap is positioned at the top of this reflective adhesive tape;
Light guide plate is arranged in this framework, and is positioned on this reflecting plate and this fixation adhesive tape, and this light guide plate has at least one incidence surface; And
At least one light supply apparatus, each light supply apparatus is arranged at respectively by the incidence surface of this light guide plate.
2. backlight module according to claim 1 is characterized in that this reflective adhesive tape is identical with the reflection coefficient of this reflecting plate.
3. backlight module according to claim 1, the material that it is characterized in that this reflective adhesive tape are to be selected from a kind of in silver, aluminium and the combination thereof.
4. backlight module according to claim 1, the material that it is characterized in that this reflecting plate are to be selected from a kind of in silver, aluminium and the combination thereof.
5. backlight module according to claim 1 is characterized in that this light guide plate comprises the prism-type light guide plate.
6. backlight module according to claim 1 is characterized in that also comprising optical diaphragm group, is arranged in this framework, and is positioned at the top of this light guide plate.
7. backlight module according to claim 6 is characterized in that this optical diaphragm group comprises:
Light-collecting piece is positioned on this light guide plate; And
Diffusion sheet is positioned on this light-collecting piece.
8. backlight module according to claim 7 is characterized in that this light-collecting piece comprises the prism-type light-collecting piece.
9. backlight module according to claim 1 is characterized in that this light supply apparatus comprises cathode fluorescent tube or light emitting diode matrix.
10. LCD is characterized in that comprising:
Backlight module comprises:
Framework, wherein a side of this framework has groove;
Reflective adhesive tape is arranged in this groove;
Fixation adhesive tape is arranged at this side of this framework, and is positioned on this reflective adhesive tape;
Reflecting plate is arranged in this framework, the gap that wherein is separated by between this reflecting plate and this fixation adhesive tape, and this gap is positioned at the top of this reflective adhesive tape;
Light guide plate is arranged in this framework, and is positioned on this reflecting plate and this fixation adhesive tape, and this light guide plate has at least one incidence surface;
At least one light supply apparatus, each light supply apparatus are arranged at respectively by the incidence surface of this light guide plate; And
Display panels is arranged on this backlight module.
11. LCD according to claim 10 is characterized in that this display panels comprises:
Thin-film transistor array base-plate;
Colored filter substrate; And
Liquid crystal layer is between this thin-film transistor array base-plate and this colored filter substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101242598A CN100476537C (en) | 2005-11-29 | 2005-11-29 | Back-light module and liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101242598A CN100476537C (en) | 2005-11-29 | 2005-11-29 | Back-light module and liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1979291A CN1979291A (en) | 2007-06-13 |
| CN100476537C true CN100476537C (en) | 2009-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101242598A Expired - Fee Related CN100476537C (en) | 2005-11-29 | 2005-11-29 | Back-light module and liquid crystal display |
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| Country | Link |
|---|---|
| CN (1) | CN100476537C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603657B (en) * | 2009-06-17 | 2011-05-04 | 友达光电股份有限公司 | Backlight module and optoelectronic device comprising same |
| CN103137024B (en) | 2013-02-04 | 2015-09-09 | 小米科技有限责任公司 | A kind of display device and a kind of mobile terminal |
| CN105911765A (en) * | 2016-06-15 | 2016-08-31 | 苏州众显电子科技有限公司 | Backlit liquid crystal displayer for computer refueling machine |
| CN110322788B (en) * | 2019-07-09 | 2021-08-03 | 业成科技（成都）有限公司 | Backlight module and cleaning method thereof |
-
2005
- 2005-11-29 CN CNB2005101242598A patent/CN100476537C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1979291A (en) | 2007-06-13 |
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Owner name: 82ND CO., LTD. OF INTELLECTUAL VENTURES FUND Free format text: FORMER OWNER: CHINA PROJECTION TUBE CO., LTD. Effective date: 20120209 |
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Effective date of registration: 20120209 Address after: Delaware Patentee after: Gao Zhi invention fund eighty-second limited liability company Address before: Taiwan, Taipei, China Zhongshan North Road three paragraph twenty-two Patentee before: Chunghwa Picture Tubes Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090408 Termination date: 20151129 |
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