CN2658778Y - Liquid crystal display device and its back light module - Google Patents
Liquid crystal display device and its back light module Download PDFInfo
- Publication number
- CN2658778Y CN2658778Y CN 03224109 CN03224109U CN2658778Y CN 2658778 Y CN2658778 Y CN 2658778Y CN 03224109 CN03224109 CN 03224109 CN 03224109 U CN03224109 U CN 03224109U CN 2658778 Y CN2658778 Y CN 2658778Y
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- Prior art keywords
- light
- layer
- module backlight
- guide plate
- light guide
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Abstract
A LCD comprises a first base plate, a liquid crystal layer, a second base plate, and a blacklighting module set. The liquid crystal layer is positioned between the first base plate and the second base plate; the blacklighting module set is disposed on one side of the second base plate. The first base plate includes a glass underlay and a light polarization layer; the second base plate comprises a glass underlay and a light reflection polatization layer. The blacklighting module set comprises a lamp-house, a light guiding plate, and a reflection component. The lamp-house is disposed on the side of the light guiding plate; the reflection component is arranged below the light guide plate; the blacklighting module set is further composed of a gama/4 phase delay layer which is disposed between the light guiding plate and the reflection component.
Description
[technical field]
The utility model refers to a kind of LCD and module backlight thereof of high brightness especially about a kind of LCD and module backlight thereof.
[background technology]
Because liquid crystal itself can not be luminous, its effect mainly is passing through or not passing through of control light, and therefore general LCD need adopt module backlight as light-source system.
Seeing also Fig. 1, is a kind of prior art LCD 1, comprises one first substrate 10, a liquid crystal layer 12, one second substrate 14 and a module 16 backlight.Wherein this first substrate 10 comprises a glass substrate 101 and a smooth polarization layer 102, this second substrate 14 comprises a glass substrate 141 and an auroral poles absorption layer 142, this module 16 backlight comprises a light source 161, a light guide plate 162, blast sheet (Brightness EnhancementFilm, BEF) 163, one diffuser plate 164 and a reflecting plate 165.
See also Fig. 2, during this LCD 1 work, light source 161 sends natural light, this natural light penetrates from blast sheet 163 after module 16 backlight is converted to area source, it still is nature light beam T when arriving auroral poles absorption layer 142, and this nature light beam T can regard that identical and light vector orthogonal linear polarization light P and linear polarization light S form by amplitude as.The polarization state of this linear polarization light P is perpendicular to the polarization state of auroral poles absorption layer 142, the polarization state of this linear polarization light S is identical with the polarization state of auroral poles absorption layer 142, therefore, only linear polarization light S can be by auroral poles absorption layer 142, and linear polarization light P is absorbed by auroral poles absorption layer 142, thereby cause the utilization factor of 1 pair of light of LCD too low, the natural light that promptly arrives auroral poles absorption layer 142 to luminous energy mostly can be passed through, and causes LCD 1 brightness low and power consumption is bigger.
Seeing also Fig. 3, is a kind of prior art LCD 2 that the United States Patent (USP) of on September 10th, 2002 bulletin discloses for the 6th, 448, No. 955, and it comprises one first substrate 20, a liquid crystal layer 22, one second substrate 24 and a module 26 backlight.Wherein, first polarization layer 202, colored filter 203 that this first substrate 20 comprises glass substrate 201 and lays respectively at glass substrate 20 both sides, thin film transistor (TFT) 241, second polarization layer 242 that this second substrate 24 comprises glass substrate 241 and lays respectively at glass substrate 241 both sides, this module 26 backlight comprises light source 2611,2612, reflects polarization layer (Double BrightnessEnhance Film, DBEF) 266 with light source 2611,2612 corresponding light guide plate 2621 and 2622, one blast sheet 263, a diffuser plate 264, a reflecting plate 265 and respectively.This reflection polarization layer 266, blast sheet 263, diffuser plate 264, light guide plate 2621 and 2622, reflecting plate 265 stack in regular turn.
See also Fig. 4, during these LCD 2 work, light source 2611,2612 sends natural light, this natural light still is nature light beam T when reflecting polarization layer 266 in module 26 internal transmission backlight, and this nature light beam T can regard that identical and light vector orthogonal linear polarization light P and linear polarization light S form by amplitude as.The polarization state of this linear polarization light P is perpendicular to the polarization state of reflection polarization layer 266, the polarization state of this linear polarization light S is identical with the polarization state of reflection polarization layer 266, therefore, only linear polarization light S can be by reflection polarization layer 266, and linear polarization light P polarization layer 266 reflection that will be reflected, partly linear polarization light P is converted to linear polarization light S and linear polarization light P again by module 26 backlight, and most linear polarization light P arrives when reflecting polarization layer 266 behind reflecting plate 265 once more, polarization state promptly still can not be by this reflection polarization layer 266 still perpendicular to reflection polarization layer 266.Therefore, though the utilization factor of 2 pairs of light of this LCD LCD 1 height more shown in Figure 1, its utilization factor again to linear polarization light P still is difficult to satisfactory, and the light transmission interface is more, thereby the luminous energy loss of LCD 2 is increased.
[utility model content]
For overcoming the shortcoming that prior art module light utilization efficiency backlight is low, power consumption is high, the utility model provides a kind of light utilization efficiency height, the low module backlight of power consumption.
For overcoming the shortcoming that prior art LCD light utilization efficiency is low, power consumption is high, the utility model provides a kind of light utilization efficiency height, the low LCD of power consumption.
The technical scheme in the invention for solving the technical problem is: a module backlight is provided, it comprises a light source, a light guide plate, a reflecting element, this light source is positioned at the light guide plate side, reflecting element is positioned at the light guide plate below, it is characterized in that this module backlight further comprises a λ/4 phase delay layer, this λ/4 phase delay layer are between light guide plate and reflecting element.
The utility model solves another technical scheme that its technical matters takes: a LCD is provided, and it comprises one first substrate, a liquid crystal layer, one second substrate and a module backlight.This liquid crystal layer is between first substrate and second substrate, and this module backlight is positioned at second substrate, one side.This first substrate comprises a glass substrate and a smooth polarization layer, and this second substrate comprises a glass substrate and light reflection polarization layer.This module backlight comprises a light source, a light guide plate, a reflecting element, this light source is positioned at the light guide plate side, reflecting element is positioned at the light guide plate below, it is characterized in that this module backlight further comprises a λ/4 phase delay layer, and this λ/4 phase delay layer are between light guide plate and reflecting element.
Compared with prior art, the invention has the beneficial effects as follows: LCD of the present utility model and module backlight thereof comprise a λ/4 phase delay layer, this λ/4 phase delay layer match with reflecting element, thereby will be converted to the polarization state polarized light identical by light reflection polarization layer by the polarized light of this light reflection polarization layer reflected back with light reflection polarization layer, thereby raising light utilization efficiency, strengthen the brightness of LCD and module backlight thereof, reduce electric quantity consumption.
[description of drawings]
Fig. 1 is a kind of sectional view of prior art LCD.
Fig. 2 is the part index path of LCD shown in Figure 1.
Fig. 3 is the sectional view of another kind of prior art LCD.
Fig. 4 is the part index path of LCD shown in Figure 3.
Fig. 5 is the sectional view of the utility model LCD first embodiment.
Fig. 6 is the part index path of LCD shown in Figure 5.
Fig. 7 is the sectional view of the utility model LCD second embodiment.
Fig. 8 is the sectional view of the utility model LCD the 3rd embodiment.
[embodiment]
Seeing also Fig. 5, is the sectional view of the utility model LCD first embodiment.This LCD 3 comprises one first substrate 30, a liquid crystal layer 32, one second substrate 34 and a module 36 backlight.This liquid crystal layer 32 is between first substrate 30 and second substrate 34, and this module 36 backlight is positioned at second substrate, 34 1 sides.This first substrate 30 comprises a glass substrate 301 and a smooth polarization layer 302, and this second substrate 34 comprises a glass substrate 341 and light reflection polarization layer 342.This module 36 backlight comprises a light source 361, a light guide plate 362, a reflecting element 365 and a λ/4 phase delay layer 366, this light guide plate 362, λ/4 phase delay layer 366 and reflecting element 365 relative second substrates 34 are arranged in order, the three can discretely be provided with, and also can adopt the plated film mode bonding to reduce the volume of LCD 3.The a plurality of V-shaped grooves 367 of surperficial tool of these light guide plate 362 relative λ/4 phase delay layer 366, this V-shaped groove 367 is one-body molded with light guide plate 362.In addition, light source 361 is positioned at the side of light guide plate 362, and this light source 361 is partly surrounded by a light source cover (not indicating).
This λ/4 phase delay layer, 366 general micas (Mica) that adopt are made, because mica is a biaxial crystal, during light incident, can resolve into orthogonal two components of light vector, because the refractive index difference of these two components can produce certain phase delay between two components.In addition, stretched polyvinyl alcohol (PVA) (Polyvinyl Alcohol) film also can be used to make λ/4 phase delay layer 366.
See also Fig. 6 (light path sketch map), the natural light beam (figure does not show) that sends from this light source 361 still is nature light beam T when arrival light reflects polarization layer 342, this nature light beam T can regard that identical and light vector orthogonal linear polarization light P and linear polarization light S form by amplitude as, the polarization state of this linear polarization light P is perpendicular to the polarization state of reflection polarization layer 342, the polarization state of this linear polarization light S is identical with the polarization state of reflection polarization layer 342, only linear polarization light S can pass through reflection polarization layer 342, and linear polarization light P is reflected.The linear polarization light P that this is reflected converts clockwise circularly polarized light R to after by λ/4 phase delay layer 366, this circularly polarized light R counterclockwise circularly polarized light R ' of element 365 reflection becoming that is reflected, this is counterclockwise circularly polarized light R ' converts linear polarization light S to after by λ/4 phase delay layer 366, so can and then arrive liquid crystal layer 32 by reflection polarization layer 342, as seen, this λ/4 phase delay layer 366 match with reflecting element 365, can not convert to by the linear polarization light P of reflection polarization layer 342 can be by the linear polarization light S of reflection polarization layer 342, make light utilization efficiency improve, and make the brightness enhancing of LCD 3 and power consumption reduce.
Seeing also Fig. 7, is second embodiment of the utility model LCD.This LCD 4 comprises one first substrate 40, a liquid crystal layer 42, one second substrate 44 and a module 46 backlight.This module 46 backlight comprises a light source 461, a light guide plate 462, a blast sheet 463, a diffuser plate 464, a reflecting element 465 and a λ/4 phase delay layer 466, this blast sheet 463, diffuser plate 464, light guide plate 462, λ/4 phase delay layer 466 and reflecting element 465 are arranged in order with respect to second substrate 44, and light source 461 is positioned at the side of light guide plate 462.In addition, λ/4 phase delay layer 466 are the interior coating of light guide plate 462, and it is plated in the surface of light guide plate 462, therefore, can reduce the volume of LCD 4 and module backlight 46.
Seeing also Fig. 8, is the 3rd embodiment of the utility model LCD.This LCD 5 comprises one first substrate 50, a liquid crystal layer 52, one second substrate 54 and a module 56 backlight.This module 56 backlight comprises a light source 561, a light guide plate 562, a blast sheet 563, a diffuser plate 564, a reflecting element 565 and a λ/4 phase delay layer 566, this blast sheet 563, diffuser plate 564, light guide plate 562, λ/4 phase delay layer 566 and reflecting element 565 are arranged in order with respect to second substrate 54, and light source 561 is positioned at the side of light guide plate 562.In addition, the lower surface of this light guide plate 562 (indicating) is gone up and is formed 567 distributions of a plurality of sites, and the uniformity coefficient of these LCD 5 bright dippings can be improved in these a plurality of sites 567.This λ/4 phase delay layer 566 are coated on a plurality of sites 567 of light guide plate 562, and reflector element 565 is positioned under λ/4 phase delay layer 566, therefore, can reduce the volume of LCD 5 and improve optical efficiency.
Claims (10)
1. module backlight, it comprises a light source, a light guide plate, a reflecting element, this light source is positioned at the light guide plate side, reflecting element is positioned at the light guide plate below, it is characterized in that this module backlight further comprises a λ/4 phase delay layer, this λ/4 phase delay layer are between light guide plate and reflecting element.
2. module backlight as claimed in claim 1 is characterized in that this light guide plate and λ/4 phase delay layer facing surfaces are provided with a plurality of V-type grooves.
3. module backlight as claimed in claim 1 is characterized in that this λ/4 phase delay layer are the interior coating of light guide plate, and it is plated in the surface of light guide plate.
4. module backlight as claimed in claim 3 is characterized in that this reflecting element is plated in the surface of this λ/4 phase delay layer.
5. module backlight as claimed in claim 1 is characterized in that this light guide plate is shaped as plate shaped or wedge shape, and its surface towards λ/4 phase delay layer is provided with a plurality of sites.
6. module backlight as claimed in claim 1 is characterized in that this module backlight further comprises a diffusion layer, and this diffusion layer is positioned at the relative λ of light guide plate/4 phase delay layer, one side.
7. module backlight as claimed in claim 6 is characterized in that this module backlight further comprises a blast sheet, and this blast sheet is positioned at diffusion layer phase to light guide plate one side.
8. module backlight as claimed in claim 1 is characterized in that this module backlight further comprises a light source cover, and this light source cover is arranged at this light source one side, and partly surrounds this light source.
9. module backlight as claimed in claim 1 is characterized in that this light source is pointolite or line source.
10. LCD, it comprises one first substrate, this first substrate comprises a glass substrate and a smooth polarization layer, a liquid crystal layer, one second substrate, this second substrate comprises that a glass substrate and a light reflect polarization layer, a module backlight, it is characterized in that this module backlight is any one described module backlight in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03224109 CN2658778Y (en) | 2003-03-07 | 2003-03-07 | Liquid crystal display device and its back light module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03224109 CN2658778Y (en) | 2003-03-07 | 2003-03-07 | Liquid crystal display device and its back light module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2658778Y true CN2658778Y (en) | 2004-11-24 |
Family
ID=34325968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03224109 Expired - Lifetime CN2658778Y (en) | 2003-03-07 | 2003-03-07 | Liquid crystal display device and its back light module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2658778Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8259255B2 (en) | 2007-06-29 | 2012-09-04 | Chimei Innolux Corporation | Backlight module and liquid crystal display using same |
| WO2017173700A1 (en) * | 2016-04-05 | 2017-10-12 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN115047669A (en) * | 2022-08-16 | 2022-09-13 | 合肥泰沃达智能装备有限公司 | Reflective screen with built-in light source and preparation method thereof |
-
2003
- 2003-03-07 CN CN 03224109 patent/CN2658778Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8259255B2 (en) | 2007-06-29 | 2012-09-04 | Chimei Innolux Corporation | Backlight module and liquid crystal display using same |
| WO2017173700A1 (en) * | 2016-04-05 | 2017-10-12 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN115047669A (en) * | 2022-08-16 | 2022-09-13 | 合肥泰沃达智能装备有限公司 | Reflective screen with built-in light source and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130307 Granted publication date: 20041124 |