CN103017019A - Backlight module and display device provided with same - Google Patents
Backlight module and display device provided with same Download PDFInfo
- Publication number
- CN103017019A CN103017019A CN2012104774981A CN201210477498A CN103017019A CN 103017019 A CN103017019 A CN 103017019A CN 2012104774981 A CN2012104774981 A CN 2012104774981A CN 201210477498 A CN201210477498 A CN 201210477498A CN 103017019 A CN103017019 A CN 103017019A
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- backlight module
- film
- polaroid
- cholesteric liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a backlight module and a display device provided with the backlight module. The backlight module comprises a back plate and a light source arranged on the back plate and further comprises a cholesteric phase liquid crystal membrane which is arranged on one side of a light-emitting face of the backlight module and is parallel to the back plate. The display device comprises the backlight module on a liquid crystal panel, wherein the liquid crystal panel comprises a liquid crystal box, a polaroid positioned on one side of the liquid crystal box, which is away from the backlight module, and a phase difference membrane formed between the liquid crystal box and the polaroid. The invention has the advantages that the efficient utilization ratio of light can be improved by utilizing the characteristic of selective optical scattering of cholesteric phase liquid crystal and the phase difference membrane.
Description
Technical field
The present invention relates to the Display Technique field, the display unit that relates in particular to a kind of aobvious backlight module and have this backlight module.
Background technology
Thin-film transistor LCD device (Thin Film Transistor-Liquid Crystal Display, TFT-LCD), a kind of in the active matrix type liquid crystal display (AM-LCD), at present unique in brightness, contrast, power consumption, life-span, catch up with comprehensively and surpass the display device of CRT on the combination properties such as volume and weight, its function admirable, the large-scale production characteristic is good, automaticity is high, the cost of raw material is cheap, development space is wide, to become rapidly the main product of new century, be a bright spot of 21 century global economic growth.But some thin-film transistor LCD devices do not have the null field memory function, in static and the same power consumption of quasistatic displaying time, and response speed is slower, when doing color displays, have to 3 times pixel and expensive color filter plate, so the utilization rate of light is very low.
Cholesteric liquid crystal is the same with other the material of liquid crystalline state, and the flowability of existing liquid, deformation behavior, viscosity have again the photoanisotropy of crystal, are a kind of good nonlinear optical materials.Because special molecular structure and the optical anisotropy of cholesteric liquid crystal determined that it has the character such as the optical activity of crystal, polarised light dichroism and the distinctive selective scattering of itself.
Summary of the invention
The technical problem that (one) will solve
The technical problem to be solved in the present invention is, for the deficiencies in the prior art, the display unit that a kind of backlight module is provided and has this backlight module is utilized characteristic and the phase retardation film of the selective scattering of cholesteric liquid crystal, thereby improves the efficient utilization rate of light.
(2) technical scheme
The invention provides a kind of backlight module, comprising: backboard and light source on the described backboard is set, described backlight module also comprises exiting surface one side that is arranged on described backlight module and the cholesteric liquid crystal film that be arranged in parallel with described backboard.
Wherein, described cholesteric liquid crystal film is left-handed pitch structure or right-hand pitch structure.
Wherein, described backlight module is the side entrance back module, and described light source is arranged on the side of described backboard, and described backboard is light reflection surface near the surface of described cholesteric liquid crystal film one side.
The present invention also provides a kind of display unit, comprise: liquid crystal panel and above-mentioned backlight module, wherein, described liquid crystal panel comprises: liquid crystal cell, described liquid crystal cell away from the polaroid of described backlight module one side and be formed at phase retardation film between described liquid crystal cell and the polaroid.
Wherein, described liquid crystal cell comprises: the infrabasal plate, liquid crystal layer, color film and the upper substrate that form successively.
Wherein, described phase retardation film is quarter-wave phase retardation film.
Wherein, under normal white mode: when described cholesteric liquid crystal film was left-handed pitch structure, the liquid crystal aligning direction that the shaft angle degree is described upper substrate+45 that see through of described polaroid were spent; When the cholesteric liquid crystal film was the right-hand pitch structure, the liquid crystal aligning direction that the shaft angle degree is described upper substrate+135 that see through of described polaroid were spent.
Wherein, under normal black pattern: when described cholesteric liquid crystal film was left-handed pitch structure, the liquid crystal aligning direction that the shaft angle degree is described upper substrate+135 that see through of described polaroid were spent; When the cholesteric liquid crystal film was the right-hand pitch structure, the liquid crystal aligning direction that the shaft angle degree is described upper substrate+45 that see through of described polaroid were spent.
Wherein, described liquid crystal layer is that phase difference is the liquid crystal layer of 270nm-280nm.
(3) beneficial effect
The present invention can utilize characteristic and the phase retardation film of the selective scattering of cholesteric liquid crystal, and improves the effective rate of utilization of light.
Description of drawings
Fig. 1 is backlight of display device module internal structural representation of the present invention;
Fig. 2 is display unit internal structure schematic diagram of the present invention (not shown backlight module).
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for explanation the present invention, but are not used for limiting the scope of the invention.
As shown in Figure 1, the invention provides a kind of backlight module 2, comprise: backboard 22 and light source 21 on the described backboard 22 is set, described backlight module also comprises exiting surface one side that is arranged on described backlight module and the cholesteric liquid crystal film 23 that be arranged in parallel with described backboard 22, and described cholesteric liquid crystal film 23 can be left-handed pitch structure or right-hand pitch structure; Described backlight module is the side entrance back module, and described light source 21 is arranged on the side of described backboard 22, and described backboard 22 is light reflection surface near the surface of described cholesteric liquid crystal film 21 1 sides.
Because special molecular structure and the optical anisotropy of cholesteric liquid crystal determined that it has the character such as the optical activity of crystal, polarised light dichroism and the distinctive selective scattering of itself.In the present embodiment, utilize the characteristic of cholesteric liquid crystal film 23 self, played the effect of time polaroid, the utilization rate of the light of raising.
As shown in Figure 2, the invention provides a kind of display unit, comprising: liquid crystal panel 1 and above-mentioned backlight module 2, wherein,
Described liquid crystal panel 1 comprises: liquid crystal cell 11, described liquid crystal cell 11 away from the polaroid 12 of described backlight module 2 one sides and be formed at phase retardation film 13 between described liquid crystal cell 11 and the polaroid 12, described phase retardation film 13 is the phase retardation film of four/wavelength; Described liquid crystal cell 11 comprises: the infrabasal plate 111, liquid crystal layer 112, color film 113 and the upper substrate 114 that form successively, described liquid crystal layer 112 is the liquid crystal layer of 270nm-280nm for phase difference.In addition, be provided with transparency electrode at described infrabasal plate 111 and described upper substrate 114.
Under normal white mode: when cholesteric liquid crystal film 23 was left-handed pitch structure, the liquid crystal aligning direction that the shaft angle degree is described upper substrate+45 that see through of described polaroid 12 were spent.But when cholesteric liquid crystal film 23 was the right-hand pitch structure, the liquid crystal aligning direction that the shaft angle degree is described upper substrate+135 that see through of described polaroid 12 were spent.
Under the normal black pattern: when described cholesteric liquid crystal film 23 was left-handed pitch structure, the liquid crystal aligning direction that the shaft angle degree is described upper substrate+135 that see through of described polaroid 12 were spent; When cholesteric liquid crystal film 23 was the right-hand pitch structure, the liquid crystal aligning direction that the shaft angle degree is described upper substrate+45 that see through of described polaroid 12 were spent.
Operation principle:
When not applying voltage, from the light of illuminator 21 emission by after the cholesteric liquid crystal film 23, all light are circularly polarized lights of dextrorotation, the circularly polarized light of its right-handed rotation becomes later left-handed circularly polarized light by liquid crystal layer 112, after four/wavelength phase retardation film 13, left-handed circular polarization light becomes linearly polarized photon, and the polarization direction of its light is consistent through axle with polaroid 12, therefore shows bright attitude.When applying voltage, cholesteric liquid crystal on the cholesteric liquid crystal film 23 is to arrange along the direction of electric field, from the light of illuminator 21 emission by after the cholesteric liquid crystal film 23, all light are circularly polarized lights of dextrorotation, the circularly polarized light of its right-handed rotation passes through after the liquid crystal layer 112 or the circularly polarized light of right-handed rotation, and after four/wavelength phase retardation film 13, the circular polarization light of dextrorotation becomes linearly polarized photon, the polarization direction of its light is consistent with the absorption axes of polaroid 12, therefore shows dark attitude.
Above embodiment only is used for explanation the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; in the situation that do not break away from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (9)
1. backlight module comprises: backboard and light source on the described backboard is set, it is characterized in that, and described backlight module also comprises exiting surface one side that is arranged on described backlight module and the cholesteric liquid crystal film that be arranged in parallel with described backboard.
2. backlight module as claimed in claim 1 is characterized in that, described cholesteric liquid crystal film is left-handed pitch structure or right-hand pitch structure.
3. backlight module as claimed in claim 1 is characterized in that, described backlight module is the side entrance back module, and described light source is arranged on the side of described backboard, and described backboard is light reflection surface near the surface of described cholesteric liquid crystal film one side.
4. display unit comprises: liquid crystal panel and such as each described backlight module among the claim 1-3, wherein,
Described liquid crystal panel comprises: liquid crystal cell, described liquid crystal cell away from the polaroid of described backlight module one side and be formed at phase retardation film between described liquid crystal cell and the polaroid.
5. display unit as claimed in claim 4 is characterized in that, described liquid crystal cell comprises: the infrabasal plate, liquid crystal layer, color film and the upper substrate that form successively.
6. display unit as claimed in claim 5 is characterized in that, described phase retardation film is quarter-wave phase retardation film.
7. display unit as claimed in claim 5 is characterized in that, under normal white mode: when described cholesteric liquid crystal film was left-handed pitch structure, the liquid crystal aligning direction that the shaft angle degree is described upper substrate+45 that see through of described polaroid were spent; When the cholesteric liquid crystal film was the right-hand pitch structure, the liquid crystal aligning direction that the shaft angle degree is described upper substrate+135 that see through of described polaroid were spent.
8. display unit as claimed in claim 5 is characterized in that, under normal black pattern: when described cholesteric liquid crystal film was left-handed pitch structure, the liquid crystal aligning direction that the shaft angle degree is described upper substrate+135 that see through of described polaroid were spent; When the cholesteric liquid crystal film was the right-hand pitch structure, the liquid crystal aligning direction that the shaft angle degree is described upper substrate+45 that see through of described polaroid were spent.
9. display unit as claimed in claim 4 is characterized in that, described liquid crystal layer is that phase difference is the liquid crystal layer of 270nm-280nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104774981A CN103017019A (en) | 2012-11-21 | 2012-11-21 | Backlight module and display device provided with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104774981A CN103017019A (en) | 2012-11-21 | 2012-11-21 | Backlight module and display device provided with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103017019A true CN103017019A (en) | 2013-04-03 |
Family
ID=47965928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104774981A Pending CN103017019A (en) | 2012-11-21 | 2012-11-21 | Backlight module and display device provided with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103017019A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1470912A (en) * | 2002-07-09 | 2004-01-28 | Lg.飞利浦Lcd有限公司 | Liquid crystal display device using cholesteryl liquid crystal |
| CN1673831A (en) * | 2004-03-26 | 2005-09-28 | 日东电工株式会社 | IPS mode liquid crystal display |
| CN1737669A (en) * | 2004-08-21 | 2006-02-22 | 三星电子株式会社 | Area source and contain the liquid crystal indicator of this light source |
| CN101126853A (en) * | 2006-08-15 | 2008-02-20 | Nec液晶技术株式会社 | image display |
-
2012
- 2012-11-21 CN CN2012104774981A patent/CN103017019A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1470912A (en) * | 2002-07-09 | 2004-01-28 | Lg.飞利浦Lcd有限公司 | Liquid crystal display device using cholesteryl liquid crystal |
| CN1673831A (en) * | 2004-03-26 | 2005-09-28 | 日东电工株式会社 | IPS mode liquid crystal display |
| CN1737669A (en) * | 2004-08-21 | 2006-02-22 | 三星电子株式会社 | Area source and contain the liquid crystal indicator of this light source |
| CN101126853A (en) * | 2006-08-15 | 2008-02-20 | Nec液晶技术株式会社 | image display |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101943829B (en) | In-plane switching liquid crystal display panel and liquid crystal display | |
| TWI375074B (en) | Polymer dispersed liquid crystal display and method of fabricating the same | |
| US9122109B2 (en) | Blue phase liquid crystal display device and manufacturing method thereof | |
| CN102759823B (en) | Liquid crystal indicator | |
| US9164303B2 (en) | Display device | |
| CN103176307B (en) | Semi-transmissive semi-reflective liquid crystal display (LCD) panel and LCD device | |
| CN105301831A (en) | Liquid crystal display device and reflective display module thereof | |
| WO2015078026A1 (en) | Color liquid crystal display panel | |
| CN102591063A (en) | Liquid crystal display switchable between transmission and reflection | |
| CN102789093A (en) | Lcd | |
| CN103969896A (en) | Flexible display panel and flexible displayer | |
| CN103969899A (en) | Semi-transmission and semi-reflection liquid crystal display panel and liquid crystal display | |
| CN105334649B (en) | The measurement method of liquid crystal efficiency in liquid crystal display panel | |
| CN104297997A (en) | Liquid crystal display panel, and display method and display device thereof | |
| CN103353682A (en) | Display panel and transparent display device | |
| CN103091898A (en) | Liquid crystal display and preparation method and display device of the same | |
| CN202522812U (en) | Transparent display panel and transparent display device | |
| US9354469B2 (en) | Transflective liquid crystal display panel and display device | |
| CN102998840A (en) | Display panel and display device comprising same | |
| CN102981325A (en) | Semi-transparent and semi-reflective liquid-crystal display panel and liquid-crystal display device | |
| CN103017019A (en) | Backlight module and display device provided with same | |
| CN2800327Y (en) | Liquid crystal display device | |
| CN106125406B (en) | A vertical alignment liquid crystal display with narrow viewing angle display | |
| CN210488200U (en) | Liquid crystal display and electronic equipment | |
| US9128340B2 (en) | Dual-TFT-substrate blue-phase liquid crystal display panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130403 |