CN203811949U - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
- Publication number
- CN203811949U CN203811949U CN201420226444.2U CN201420226444U CN203811949U CN 203811949 U CN203811949 U CN 203811949U CN 201420226444 U CN201420226444 U CN 201420226444U CN 203811949 U CN203811949 U CN 203811949U
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- guide plate
- light guide
- light
- backlight module
- described light
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 17
- 239000011248 coating agent Substances 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 16
- 229920000642 polymer Polymers 0.000 abstract description 2
- 230000010287 polarization Effects 0.000 description 18
- 230000005540 biological transmission Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model provides a backlight module and a liquid crystal display device, and relates to the technical field of liquid crystal display. The liquid crystal display device comprises a first polarizing film, a display panel and the backlight module. The display panel is positioned below the first polarizing film, and the backlight module is positioned below the display panel. The backlight module comprises a light guide plate. The light guide plate is made of zero zero-birefringence polymers materials, and prism-shaped structures are arranged at the bottom of the light guide plate; a light source and a reflective film are arranged on a side surface of the light guide plate, and the sides, except for the side which faces the light guide plate, of the light source are surrounded by the reflective film; a reflection type polarizer is arranged between the light source and the light guide plate; a reflective plate is arranged below the light guide plate. The backlight module and the liquid crystal display device have the advantage that the utilization rate of emergent light of the backlight module can be improved.
Description
Technical field
The utility model relates to technical field of liquid crystal display, relates in particular to a kind of backlight module and liquid crystal indicator.
Background technology
Display panel in liquid crystal indicator itself can not be luminous, and the brightness that display panel only can pass through by control light forms different GTGs, needs the support of backlight module.Conventionally the light of backlight module outgoing is natural light, the polarized light that includes various polarization directions, display panel is provided with polaroid near backlight module one side, thereby the light that display panel can be accepted is only the polarized light of a certain polarization direction, the polarized light of other polarization direction can not see through this polaroid, cause the waste of the polarized light of this polarization direction, made the utilization factor of light of backlight module outgoing lower.
Utility model content
The utility model provides a kind of backlight module and liquid crystal indicator, can improve the utilization factor of the light of backlight module outgoing.
On the one hand, the utility model provides a kind of backlight module, comprising: light guide plate, and described light guide plate is made by zero zero birefraction polymeric material, and the bottom surface of described light guide plate is prism-like structure; The side of described light guide plate is provided with light source and reflectance coating, and described light source is all surrounded by described reflectance coating except the side towards described light guide plate; Between described light source and described light guide plate, be provided with reflection type polarizer; The below of described light guide plate is provided with reflecting plate.
Particularly, described light source is LED or CCFL.
Particularly, described reflecting plate is mirror reflective plate.
On the other hand, the utility model also provides a kind of liquid crystal indicator, comprising: the first polaroid, be positioned at the display panel of described the first polaroid below, and be positioned at the backlight module of described display panel below; Described backlight module comprises: light guide plate, and described light guide plate is made by zero zero birefraction polymeric material, and the bottom surface of described light guide plate is prism-like structure; The side of described light guide plate is provided with light source and reflectance coating, and described light source is all surrounded by described reflectance coating except the side towards described light guide plate; Between described light source and described light guide plate, be provided with reflection type polarizer; The below of described light guide plate is provided with reflecting plate.
Particularly, between described display panel and described light guide plate, be provided with the second polaroid;
Described reflection type polarizer see through the identical through direction of principal axis of direction of principal axis and described the second polaroid.
Particularly, described light source is LED or CCFL.
Preferably, described reflecting plate is mirror reflective plate.
The backlight module that the utility model provides and liquid crystal indicator, in backlight module, the Circulated reflection effect of reflection type polarizer and reflectance coating can make the second polarized light in natural light that light source sends change the first polarized light into, the first polarized light transmission cross reflection type polarizer and the light guide plate leaded light made by zero zero birefraction material after, still be the first polarized light, compared with prior art, make most light in light source be converted into the light of the particular polarization that can be shown panel utilization, thereby improved the utilization factor of the light of backlight module outgoing.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of a kind of backlight module in the utility model embodiment;
Fig. 2 is light source in the backlight module of Fig. 1 and the structural representation of reflection type polarizer;
Fig. 3 is the structural representation of a kind of liquid crystal indicator in the utility model embodiment;
Fig. 4 is the structural representation of the another kind of liquid crystal indicator in the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, the utility model embodiment provides a kind of backlight module, comprise: light guide plate 11, light guide plate 11 is made by zero zero birefraction polymkeric substance (Zero Zero-Birefringence Polymers) material, and the bottom surface of light guide plate 11 is prism-like structure; The side of light guide plate 11 is provided with light source 12 and reflectance coating 13, and light source 12 is all reflected film 13 and surrounds except the side towards light guide plate 11; Between light source 12 and light guide plate 11, be provided with reflection type polarizer 14; The below of light guide plate 11 is provided with reflecting plate 15.
When backlight module provides backlight, as shown in Figure 2, light source 12 is lighted, the light that light source 12 sends is natural light, the light that can be divided into the first polarized light and second two kinds of polarization directions of polarized light, in Fig. 2, hatched arrows and non-hatched arrows represent respectively the direction of propagation of the first polarized light and the second polarized light, between light source 12 and light guide plate 11, be provided with reflection type polarizer 14, reflection type polarizer 14 can make a kind of light transmission of polarization direction, the light reflection of another kind of polarization direction, in the natural light that light source 6 sends, the first polarized light can see through reflection type polarizer 14, the second polarized light is reflected 14 reflections of formula polarizer, after the repeatedly Circulated reflection of the second polarized light of reflection through reflectance coating 12 and reflection type polarizer 14, the second polarized light can change the first polarized light into, and conversion ratio is higher, from the first polarized light of reflection type polarizer 14 transmissions, enter light guide plate 11, light guide plate 11 is made by zero zero birefraction polymeric material, zero zero birefraction polymeric material is in the situation that being subject to external force and not being subject to external force, all show isotropic character, the light guide plate 11 of being made by zero zero birefraction polymeric material can not change or light conducted less change polarisation of light state in the situation that, light guide plate 11 bottom surface prism-like structures can reflect the first polarized light, from the first polarized light of reflection type polarizer 14 transmissions of light guide plate 11 sides, enter light guide plate 11, by prism-like structure, reflect and can make the first polarized light penetrate from the front of light guide plate 11, light guide plate 11 below reflecting plates 15 can reflect the first polarized light towards reflecting plate 15 being penetrated by light guide plate 11.Therefore backlight module in the present embodiment only sends the first polarized light, can omit the polaroid between display panel and light guide plate in prior art, the first polarized light that display panel directly utilizes backlight module to send.Certainly, also can between light guide plate and display panel, polaroid be set, set reflection type polarizer see through direction of principal axis and this polaroid to see through direction of principal axis consistent, the first polarized light can directly see through this polaroid, thereby is shown panel use.
The backlight module that the utility model provides, in backlight module, the Circulated reflection effect of reflection type polarizer and reflectance coating can make the second polarized light in natural light that light source sends change the first polarized light into, the first polarized light transmission cross reflection type polarizer and the light guide plate leaded light made by zero zero birefraction material after, still be the first polarized light, compared with prior art, make most light in light source be converted into the light of the particular polarization that can be shown panel utilization, thereby improved the utilization factor of the light of backlight module outgoing.
Particularly, light source 12 can be light emitting diode (Light Emitting Diode is called for short LED) or cathode fluorescent tube (Cold Cathode Fluorescent Lamp is called for short CCFL) etc.
Preferably, as shown in Figure 1, reflecting plate 15 can be mirror reflective plate.Mirror reflective plate did not change or less change polarized state of light in the polarization by reflection light time, made to enter the polarized light of light guide plate after reflection identical with original polarized light polarization direction, to guarantee that the utilization factor of light can not reduce.
As shown in Figure 3, the utility model also provides a kind of liquid crystal indicator, comprising: the first polaroid 21, be positioned at the display panel 2 of the first polaroid 21 belows, and be positioned at the backlight module of display panel 2 belows; Backlight module comprises: light guide plate 11, and light guide plate 11 is made by zero zero birefraction polymeric material, and the bottom surface of light guide plate 11 is prism-like structure; The side of light guide plate 11 is provided with light source 12 and reflectance coating 13, and light source is all reflected film 13 and surrounds except the side towards light guide plate 11; Between light source 12 and light guide plate 11, be provided with reflection type polarizer 14; The below of light guide plate 11 is provided with reflecting plate 15.
When backlight module provides backlight, as shown in Figure 2, light source 12 is lighted, the light that light source 12 sends is natural light, the light that can be divided into the first polarized light and second two kinds of polarization directions of polarized light, in Fig. 2, hatched arrows and non-hatched arrows represent respectively the direction of propagation of the first polarized light and the second polarized light, between light source 12 and light guide plate 11, be provided with reflection type polarizer 14, reflection type polarizer 14 can make a kind of light transmission of polarization direction, the light reflection of another kind of polarization direction, in the natural light that light source 6 sends, the first polarized light can see through reflection type polarizer 14, the second polarized light is reflected 14 reflections of formula polarizer, after the repeatedly Circulated reflection of the second polarized light of reflection through reflectance coating 12 and reflection type polarizer 14, the second polarized light can be converted to the first polarized light, and conversion ratio is higher, the light that light source sends can see through reflection type polarizer 14, and the light seeing through is the first polarized light, from the first polarized light of reflection type polarizer 14 transmissions, enter light guide plate 11, light guide plate 11 is made by zero zero birefraction polymeric material, zero zero birefraction polymeric material is in the situation that being subject to external force and not being subject to external force, all show isotropic character, the light guide plate 11 of being made by zero zero birefraction polymeric material can not change or light conducted less change polarisation of light state in the situation that, light guide plate 11 bottom surface prism-like structures can reflect the first polarized light, from the first polarized light of reflection type polarizer 14 transmissions of light guide plate 11 sides, enter light guide plate 11, by prism-like structure, reflect and can make the first polarized light penetrate from the front of light guide plate 11, light guide plate 11 below reflecting plates 15 can reflect the first polarized light towards reflecting plate 15 being penetrated by light guide plate 11.Therefore backlight module in the present embodiment only sends the first polarized light, can omit the polaroid between display panel 2 and light guide plate 11 in prior art, the first polarized light that display panel 2 directly utilizes backlight module to send.
The liquid crystal indicator that the utility model provides, in backlight module, the Circulated reflection effect of reflection type polarizer and reflectance coating can make the second polarized light in natural light that light source sends change the first polarized light into, the first polarized light transmission cross reflection type polarizer and the light guide plate leaded light made by zero zero birefraction material after, still be the first polarized light, compared with prior art, make most light in light source be converted into the light of the particular polarization that can be shown panel utilization, thereby improved the utilization factor of the light of backlight module outgoing.
Alternatively, the structure of the polaroid between above-mentioned omission display panel and light guide plate, can also be as shown in Figure 4, between display panel 2 and light guide plate 11, be provided with the second polaroid 22; Reflection type polarizer 14 see through the identical through direction of principal axis of direction of principal axis and the second polaroid 22.Make the polarized light of backlight module outgoing can directly see through the second polaroid 22, shown panel is used.
Particularly, light source 12 can be LED or CCFL.
Preferably, as shown in Figure 3, reflecting plate 15 can be mirror reflective plate.Mirror reflective plate did not change or less change polarized state of light in the polarization by reflection light time, made to enter the polarized light of light guide plate after reflection identical with original polarized light polarization direction, to guarantee that the utilization factor of light can not reduce.。
Above-mentioned liquid crystal indicator is specifically as follows: any product or parts with crystal display such as liquid crystal panel, mobile phone, panel computer, televisor, display, notebook computer, digital album (digital photo frame), navigating instrument.
The liquid crystal indicator that the utility model provides, in backlight module, the Circulated reflection effect of reflection type polarizer and reflectance coating can make the second polarized light in natural light that light source sends change the first polarized light into, the first polarized light transmission cross reflection type polarizer and the light guide plate leaded light made by zero zero birefraction material after, still be the first polarized light, compared with prior art, make most light in light source be converted into the light of the particular polarization that can be shown panel utilization, thereby improved the utilization factor of the light of backlight module outgoing.
The above; it is only embodiment of the present utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of described claim.
Claims (7)
1. a backlight module, is characterized in that, comprising:
Light guide plate, described light guide plate is made by zero zero birefraction polymeric material, and the bottom surface of described light guide plate is prism-like structure;
The side of described light guide plate is provided with light source and reflectance coating, and described light source is all surrounded by described reflectance coating except the side towards described light guide plate;
Between described light source and described light guide plate, be provided with reflection type polarizer;
The below of described light guide plate is provided with reflecting plate.
2. backlight module according to claim 1, is characterized in that,
Described light source is LED or CCFL.
3. backlight module according to claim 1, is characterized in that,
Described reflecting plate is mirror reflective plate.
4. a liquid crystal indicator, is characterized in that, comprising:
The first polaroid, is positioned at the display panel of described the first polaroid below, is positioned at the backlight module of described display panel below;
Described backlight module comprises:
Light guide plate, described light guide plate is made by zero zero birefraction polymeric material, and the bottom surface of described light guide plate is prism-like structure;
The side of described light guide plate is provided with light source and reflectance coating, and described light source is all surrounded by described reflectance coating except the side towards described light guide plate;
Between described light source and described light guide plate, be provided with reflection type polarizer;
The below of described light guide plate is provided with reflecting plate.
5. liquid crystal indicator according to claim 4, is characterized in that,
Between described display panel and described light guide plate, be provided with the second polaroid;
Described reflection type polarizer see through the identical through direction of principal axis of direction of principal axis and described the second polaroid.
6. according to the liquid crystal indicator described in claim 4 or 5, it is characterized in that,
Described light source is LED or CCFL.
7. according to the liquid crystal indicator described in claim 4 or 5, it is characterized in that,
Described reflecting plate is mirror reflective plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420226444.2U CN203811949U (en) | 2014-05-05 | 2014-05-05 | Backlight module and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420226444.2U CN203811949U (en) | 2014-05-05 | 2014-05-05 | Backlight module and liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203811949U true CN203811949U (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420226444.2U Expired - Fee Related CN203811949U (en) | 2014-05-05 | 2014-05-05 | Backlight module and liquid crystal display device |
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| Country | Link |
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| CN (1) | CN203811949U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104965345A (en) * | 2015-07-13 | 2015-10-07 | 京东方科技集团股份有限公司 | Backlight module and display screen |
| CN105700239A (en) * | 2016-04-22 | 2016-06-22 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| CN111553301A (en) * | 2020-05-08 | 2020-08-18 | 深圳天德钰电子有限公司 | Display device |
| CN116625476A (en) * | 2023-06-07 | 2023-08-22 | 江苏汇力智能科技有限公司 | Electronic belt scale fine-tuning calibration equipment that weighs |
-
2014
- 2014-05-05 CN CN201420226444.2U patent/CN203811949U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104965345A (en) * | 2015-07-13 | 2015-10-07 | 京东方科技集团股份有限公司 | Backlight module and display screen |
| CN105700239A (en) * | 2016-04-22 | 2016-06-22 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| WO2017181477A1 (en) * | 2016-04-22 | 2017-10-26 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| US10120117B2 (en) | 2016-04-22 | 2018-11-06 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Backlight module and display device |
| CN111553301A (en) * | 2020-05-08 | 2020-08-18 | 深圳天德钰电子有限公司 | Display device |
| CN111553301B (en) * | 2020-05-08 | 2022-10-14 | 深圳天德钰科技股份有限公司 | Display device |
| CN116625476A (en) * | 2023-06-07 | 2023-08-22 | 江苏汇力智能科技有限公司 | Electronic belt scale fine-tuning calibration equipment that weighs |
| CN116625476B (en) * | 2023-06-07 | 2023-10-24 | 江苏汇力智能科技有限公司 | Electronic belt scale fine-tuning calibration equipment that weighs |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20140903 |