CN202149399U - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
- Publication number
- CN202149399U CN202149399U CN201120183986U CN201120183986U CN202149399U CN 202149399 U CN202149399 U CN 202149399U CN 201120183986 U CN201120183986 U CN 201120183986U CN 201120183986 U CN201120183986 U CN 201120183986U CN 202149399 U CN202149399 U CN 202149399U
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- lgp
- module backlight
- liquid crystal
- luminous tube
- refractive index
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Abstract
An embodiment of the utility model discloses a backlight module and a liquid crystal display device, which relate to the technical field of displaying and aim at improving the optical characteristics of the backlight module on the premise that the small-sized outer shape of the backlight module is not changed. The backlight module comprises a back board, a light guide board arranged on the back board, a circuit board arranged on the outside of the light inlet face of the light guide board, lighting tubes arranged on the circuit board between the circuit board and the light guide board, an adhesive layer arranged between the lighting tube and the light guide board and a rubber frame arranged on the back board, wherein the light outlet face of the lighting tube is arranged opposite to the light inlet face of the light guide board, the adhesive layer is arranged between the lighting tube and the light guide board, the refractive index of the adhesive layer is larger than that of the air, the rubber frame is used for fixing the optical module and bearing a liquid crystal panel. The backlight module is mainly used in liquid crystal display equipment.
Description
Technical field
The utility model relates to the Display Technique field, relates in particular to a kind of module backlight and liquid crystal indicator.
Background technology
At present, the schematic cross-section of the module backlight of most liquid crystal indicators uses is as shown in Figure 1.Wherein, said module backlight 100 mainly comprises: backboard 110, reflector plate 120, LGP 130, circuit board 140, luminous tube 150, optical diaphragm group 160 and glue frame 170; Wherein, said LGP 130 comprises lower surface 131, upper surface 132, and the incidence surface 133 of connection upper and lower surfaces.The schematic top plan view of said module backlight is as shown in Figure 2.Wherein, for ease of explanation, said Fig. 2 only illustrates incidence surface 133, circuit board 140 and the luminous tube 150 of LGP 130, LGP.
In conjunction with shown in Figure 2; In said module 100 backlight; Because luminous tube 150 is welded on the circuit board 140 and fixes with metal backing 110; So in the assembling process of module 100 backlight, inevitably have the space between the incidence surface 133 of said luminous tube 150 and LGP, the light that makes said luminous tube 150 send reflects at incidence surface 133.
In fact, because the refractive index of said LGP 130 is greater than the refractive index of air, so the refraction angle r when light gets into LGP is less than incidence angle i; Again because under the certain situation of incidence angle, the light mixing distance H of luminous tube and the refraction angle relation of being inversely proportional to, so the refraction angle is more little, light mixing distance is big more.When the light mixing distance of luminous tube became big, module backlight was prone to produce the firefly hot spot, and the optical characteristics variation.If eliminate the firefly hot spot of module backlight, need to select bigger light mixing distance, but this can sacrifice the small and exquisite relatively mechanism's profile of module backlight simultaneously.So be badly in need of the module backlight that a kind of profile is small and exquisite and optical characteristics is high.
The utility model content
The utility model embodiment provides a kind of module backlight and liquid crystal indicator, under the prerequisite that does not change the small and exquisite profile of module backlight, has improved the optical characteristics of module backlight.
The utility model embodiment adopts following technical scheme:
A kind of module backlight comprises:
Backboard;
LGP is arranged on the said backboard;
Circuit board is arranged at outside the incidence surface of said LGP;
Luminous tube is arranged on the said circuit board, between said circuit board and said LGP;
The glue frame is arranged on the said backboard;
Mucigel is arranged between said luminous tube and the said LGP, and wherein, the refractive index of said mucigel is greater than the refractive index of air.
A kind of liquid crystal indicator comprises: module backlight and liquid crystal panel; Wherein, said liquid crystal panel is arranged on the glue frame in the said module backlight.
Module a kind of backlight and liquid crystal indicator that the utility model embodiment provides; Through the mucigel of refractive index greater than air refraction is set between luminous tube and LGP, make the refraction angle of the light entering LGP that luminous tube sends under the certain prerequisite of incidence angle increase.According to the light mixing distance and the refraction angle relation of being inversely proportional to of luminous tube, so the light mixing distance of luminous tube reduces, and then the optical characteristics of module backlight improves.In addition, said module backlight does not change the contour structures of himself when improving optical characteristics.Therefore, utilize the technical scheme of the utility model embodiment, under the prerequisite that does not change the small and exquisite profile of module backlight, improved the optical characteristics of module backlight.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the utility model embodiment; The accompanying drawing of required use is done an introduction simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic cross-section of prior art module backlight;
Fig. 2 is the schematic top plan view of prior art module backlight;
Fig. 3 is the schematic cross-section of the utility model embodiment one module backlight;
Fig. 4 is the another schematic cross-section of the utility model embodiment one module backlight;
Fig. 5 is the schematic top plan view of the utility model embodiment one module backlight;
Fig. 6 is the schematic cross-section of the utility model embodiment two liquid crystal indicators;
Fig. 7 is the another schematic cross-section of the utility model embodiment two liquid crystal indicators;
Reference numeral
100-module backlight; The 110-backboard; The 120-reflector plate; The 130-LGP, 131-lower surface, 132-upper surface, 133-incidence surface; The 140-circuit board; The 150-luminous tube; The 160-optical diaphragm group; 170-glue frame;
200-module backlight; The 210-backboard; The 220-reflector plate; The 230-LGP, 231-lower surface, 232-upper surface, 233-incidence surface; The 240-circuit board; The 250-luminous tube; The 260-mucigel; The 270-optical diaphragm group; 280-glue frame;
Frame before the 300-; The 310-backboard; The 320-reflector plate; The 330-LGP, 331-lower surface, 332-upper surface, 333-incidence surface; The 340-circuit board; The 350-luminous tube; The 360-mucigel; The 370-optical diaphragm group; 380-glue frame; The 390-liquid crystal panel.
The specific embodiment
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 3, the utility model embodiment one provides a kind of module backlight 200, comprising: backboard 210; LGP 230 is arranged on the said backboard 210; Circuit board 240 is arranged at outside the incidence surface of said LGP 230; Luminous tube 250 is arranged on the said circuit board 240, and between said circuit board 240 and said LGP 230, and the incidence surface 233 of the exiting surface of said luminous tube 250 and said LGP 230 is oppositely arranged; Mucigel 260 is arranged between said luminous tube 250 and the said LGP 230, and wherein, the refractive index of said mucigel is greater than the refractive index of air; Glue frame 280 is arranged on the said backboard 210, is used for fixing said optical diaphragm group 270 and bearing liquid crystal display panel (not shown).
In addition, as shown in Figure 4, said module 200 backlight also comprises: reflector plate 220 is arranged on the said backboard 210; Optical diaphragm group 270 is arranged on the said LGP 230.In addition, in practical application, said reflector plate 220 can be integrated in the said backboard 210, and said optical diaphragm group 270 also can be integrated in the said LGP 230 (not shown).
In the present embodiment, as shown in Figure 4, said LGP 230 comprises lower surface 231, upper surface 232 and incidence surface 233, and wherein, said incidence surface 233 is used to connect said upper surface 231 and said lower surface 232.
Suppose that the spacing between adjacent two luminous tubes 250 is P; Mucigel 260 thickness between the luminous tube 250 and the LGP plane of incidence 233 are D; The incidence angle that incides the light of incidence surface 233 is i; The refraction angle that light gets into LGP 230 is r, and then the light mixing distance H of luminous tube 250 is calculated by following formula:
H＝(P-D×tan(i))/tan(r) (1)
In above-mentioned formula (1), if i, P and D are certain value, the light mixing distance H of luminous tube and the refraction angle r relation of being inversely proportional to so, promptly refraction angle r is big more, and light mixing distance H is more little, and r is more little at the refraction angle, and light mixing distance H is big more.
Can know according to the law of refraction again:
n1×sin(i)＝n2×sin(r) (2)
In formula (2), n1 is the refractive index of the dielectric layer between said luminous tube 250 and the said LGP 230, and n2 is the refractive index of LGP 230.In the prior art, the dielectric layer between said luminous tube 250 and the said LGP 230 is an air, and in the present embodiment, the dielectric layer between said luminous tube 250 and the said LGP 230 is a mucigel 260.Because the refractive index of said mucigel 260 is greater than the refractive index of air, present embodiment is with respect to prior art so, and the refractive index of the dielectric layer between said luminous tube 250 and the said LGP 230 has increased, and promptly n1 has increased; Under the constant situation of the refractive index n of incidence angle i and LGP 230 2, the refraction angle r that the light of luminous tube gets into LGP 230 has also correspondingly increased.
Can obtain according to formula (1), when the spacing P between incidence angle i, mucigel 260 thickness D and adjacent two luminous tubes 250 was identical, refraction angle r increased, and the light mixing distance H of luminous tube is reduced again.In addition, said module backlight does not change the contour structures of himself when improving optical characteristics.Therefore, utilize the module backlight of the embodiment of the invention, under the prerequisite of not sacrificing the small and exquisite profile of module backlight, reduced light mixing distance, and then improved the optical characteristics of module backlight.
Can know by above description; Through increasing in that the refraction angle that light that the mucigel of a kind of refractive index greater than air refraction make that luminous tube sends under the certain prerequisite of incidence angle gets into LGP is set between luminous tube and the LGP; Light mixing distance and the refraction angle relation of being inversely proportional to according to luminous tube; So the light mixing distance of luminous tube reduces, and then the optical characteristics of module backlight improves.In addition, said module backlight does not change the contour structures of himself when improving optical characteristics.Therefore, utilize the technical scheme of the utility model embodiment, under the prerequisite that does not change the small and exquisite profile of module backlight, improved the optical characteristics of module backlight.
For clearly showing the advantage of present embodiment, present embodiment is further specified in conjunction with the schematic top plan view of the said module backlight of present embodiment shown in Figure 5.For the ease of explanation, Fig. 5 only shows incidence surface 233, circuit board 240, luminous tube 250 and the mucigel 260 of LGP 230, LGP 230.
Wherein, in the present embodiment, the refractive index of said mucigel 260 equals the refractive index of said LGP 230, and then learns, the incidence angle that light gets into mucigel equals the refraction angle that light gets into LGP.Because the refractive index of said LGP 230 is greater than the refractive index of air, so the refractive index of said mucigel 260 is also greater than the refractive index of air.Therefore know that present embodiment is with respect to prior art, the refractive index of the dielectric layer between said luminous tube 250 and the said LGP 230 has increased.Can know according to above-mentioned formula (2); Under the constant situation of the refractive index n of incidence angle i and LGP 230 2; The refractive index n 1 of the dielectric layer between said luminous tube 250 and the said LGP 230 increases, and makes the light of luminous tube get into the also correspondingly increase of refraction angle r of LGP 230.
As shown in Figure 5; The light mixing distance of supposing luminous tube 250 is H; Spacing between adjacent two luminous tubes 250 is P; Mucigel 260 thickness between the luminous tube 250 and the LGP plane of incidence 233 are D, and the incidence angle that incides the light of incidence surface 233 is i, and the refraction angle that light gets into LGP 230 is r.Can know according to above-mentioned formula (1); When the spacing P between incidence angle i, mucigel 260 thickness D and adjacent two luminous tubes 250 does not change; The light mixing distance H of said luminous tube and the refraction angle r relation of being inversely proportional to, promptly refraction angle r is big more, and light mixing distance H is more little; R is more little at the refraction angle, and light mixing distance H is big more.Therefore, utilize the module backlight of the embodiment of the invention, refraction angle r increases, and makes that the best light mixing distance of luminous tube 250 is that H diminishes, and then under the prerequisite of not sacrificing the small and exquisite profile of module backlight, has improved the optical characteristics of module backlight.
Further, said mucigel 260 is closely linked with said LGP 230 with said luminous tube 250, so that do not have the space between said mucigel 260 and the said luminous tube 250, and do not have the space between said mucigel 260 and the said LGP 230.In addition, in the present embodiment, said backboard 210 can the applied metal material; Said optical diaphragm group 270 can be diffusion sheet or concentration piece; Said luminous tube can be light emitting diode.
As shown in Figure 6, the utility model embodiment two provides a kind of liquid crystal indicator, comprises module backlight and liquid crystal panel; Wherein, said liquid crystal panel is arranged on the glue frame in the said module backlight.Concrete, said liquid crystal indicator comprises: backboard 310; LGP 330 is arranged on the said backboard 310; Circuit board 340 is arranged at outside the incidence surface of said LGP; Luminous tube 350 is arranged on the said circuit board, between said circuit board and said LGP; Mucigel 360 is arranged between said luminous tube and the said LGP, and wherein, the refractive index of said mucigel is greater than the refractive index of air; Glue frame 380 is arranged on the said backboard; Liquid crystal panel 390 is arranged on the said glue frame 380.
In addition, as shown in Figure 7, said liquid crystal indicator also comprises: reflector plate 320 is arranged on the said backboard 310; Optical diaphragm group 370 is arranged on the said LGP 330; Preceding frame 300 is arranged on the said liquid crystal panel 390.In addition, in practical application, said reflector plate 320 can be integrated in the said backboard 310, and said optical diaphragm group 370 can be integrated on the said LGP 330.
Concrete, as shown in Figure 7, said LGP 330 comprises lower surface 331, upper surface 332 and incidence surface 333, wherein, said incidence surface 333 is used to connect said upper surface 331 and said lower surface 332.
Wherein, the structure of said liquid crystal indicator and operation principle can be with reference to the descriptions of aforementioned module backlight.
Can know by above description; Through increasing in that the refraction angle that light that the mucigel of a kind of refractive index greater than air refraction make that luminous tube sends under the certain prerequisite of incidence angle gets into LGP is set between luminous tube and the LGP; Light mixing distance and the refraction angle relation of being inversely proportional to according to luminous tube; So the light mixing distance of luminous tube reduces, thereby the optical characteristics of module backlight improves, and further improves the image quality of liquid crystal indicator.In addition, said liquid crystal indicator does not change the contour structures of himself when improving image quality.Therefore, utilize the technical scheme of the utility model embodiment, under the prerequisite that does not change the small and exquisite profile of liquid crystal indicator, improved the image quality of liquid crystal indicator.
Further, preferred, in the present embodiment, the refractive index of said mucigel 360 equals the refractive index of said LGP 330.
In addition, said mucigel 360 is closely linked with said LGP 330 with said luminous tube 350, so that do not have the space between said mucigel 360 and the said luminous tube 350, and do not have the space between said mucigel 360 and the said LGP 330.In addition, in the present embodiment, said backboard 310 can the applied metal material; Said optical diaphragm group 370 can be diffusion sheet or concentration piece; Said luminous tube 350 can be light emitting diode.
In sum, utilize the technical scheme of the utility model embodiment, under the prerequisite that does not change the small and exquisite profile of module backlight, improved the optical characteristics of module backlight.
The above; Be merely the specific embodiment of the utility model; But the protection domain of the utility model is not limited thereto; Any technical staff who is familiar with the present technique field can expect changing or replacement in the technical scope that the utility model discloses easily, all should be encompassed within the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with the protection domain of said claim.
Claims (10)
1. a module backlight is characterized in that, comprising:
Backboard;
LGP is arranged on the said backboard;
Circuit board is arranged at outside the incidence surface of said LGP;
Luminous tube is arranged on the said circuit board, between said circuit board and said LGP;
The glue frame is arranged on the said backboard;
Mucigel is arranged between said luminous tube and the said LGP, and wherein, the refractive index of said mucigel is greater than the refractive index of air.
2. module backlight according to claim 1 is characterized in that, the refractive index of said mucigel equals the refractive index of said LGP.
3. module backlight according to claim 2 is characterized in that, said mucigel is closely linked said luminous tube and said LGP.
4. according to the arbitrary described module backlight of claim 1-3, it is characterized in that said LGP comprises: upper surface, lower surface and incidence surface, wherein, said incidence surface is used to connect said upper surface and said lower surface.
5. according to the arbitrary described module backlight of claim 1-3, it is characterized in that said backboard applied metal material; Said luminous tube comprises light emitting diode.
6. according to the arbitrary described module backlight of claim 1-3, it is characterized in that also comprise: reflector plate is arranged on the said backboard.
7. according to the arbitrary described module backlight of claim 1-3, it is characterized in that also comprise: optical diaphragm group is arranged on the said LGP.
8. module backlight according to claim 7 is characterized in that said optical diaphragm group comprises diffusion sheet or concentration piece.
9. a liquid crystal indicator is characterized in that, comprises arbitrary described module backlight of claim 1-8 and liquid crystal panel; Wherein, said liquid crystal panel is arranged on the glue frame in the said module backlight.
10. liquid crystal indicator according to claim 9 is characterized in that, also comprises: preceding frame is arranged on the said liquid crystal panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120183986U CN202149399U (en) | 2011-06-01 | 2011-06-01 | Backlight module and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120183986U CN202149399U (en) | 2011-06-01 | 2011-06-01 | Backlight module and liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202149399U true CN202149399U (en) | 2012-02-22 |
Family
ID=45590457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120183986U Expired - Lifetime CN202149399U (en) | 2011-06-01 | 2011-06-01 | Backlight module and liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202149399U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878495A (en) * | 2012-10-12 | 2013-01-16 | 北京京东方光电科技有限公司 | Backlight and manufacturing method and display device for backlight |
| CN107632459A (en) * | 2017-10-13 | 2018-01-26 | 惠州市华星光电技术有限公司 | Liquid crystal display and its backlight module |
-
2011
- 2011-06-01 CN CN201120183986U patent/CN202149399U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878495A (en) * | 2012-10-12 | 2013-01-16 | 北京京东方光电科技有限公司 | Backlight and manufacturing method and display device for backlight |
| CN107632459A (en) * | 2017-10-13 | 2018-01-26 | 惠州市华星光电技术有限公司 | Liquid crystal display and its backlight module |
| WO2019071700A1 (en) * | 2017-10-13 | 2019-04-18 | 惠州市华星光电技术有限公司 | Liquid crystal display and backlight module thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120222 |