CN102662272A - Semi-penetration and semi-reflection liquid crystal display and liquid crystal panel of semi-penetration and semi-reflection liquid crystal display - Google Patents

Semi-penetration and semi-reflection liquid crystal display and liquid crystal panel of semi-penetration and semi-reflection liquid crystal display Download PDF

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Publication number
CN102662272A
CN102662272A CN2012101064181A CN201210106418A CN102662272A CN 102662272 A CN102662272 A CN 102662272A CN 2012101064181 A CN2012101064181 A CN 2012101064181A CN 201210106418 A CN201210106418 A CN 201210106418A CN 102662272 A CN102662272 A CN 102662272A
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China
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semi
liquid crystal
overlayer
phase retardation
retardation film
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CN2012101064181A
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Inventor
洪文进
连詹田
谢文仁
吴宏昱
汤逢锦
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CPT Video Wujiang Co Ltd
Chunghwa Picture Tubes Ltd
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CPT Video Wujiang Co Ltd
Chunghwa Picture Tubes Ltd
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Priority to CN2012101064181A priority Critical patent/CN102662272A/en
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Abstract

The invention discloses a semi-penetration and semi-reflection liquid crystal display which comprises a liquid crystal panel and a backlight module, wherein the liquid crystal panel comprises a thin film transistor substrate and a colour light filter substrate; the thin film transistor substrate comprises a plurality of pixel areas, in each of which a penetration area and a reflection area are defined; the colour light filter substrate comprises a plurality of colour light filter areas; each colour light filter area comprises a phase delay film and a coverage layer; the phase delay film has reactive liquid crystal, and the phase delay film and the coverage layer are stacked together and correspond to the reflection area, so that the gap between the colour light filter substrate and the thin film transistor substrate in the reflection area is half of the gap between the colour light filter substrate and the thin film transistor substrate in the penetration area, and the penetration area and the reflection area respectively use the backlight module and an external ambient light as light sources.

Description

Semi-penetrated semi-reflected liquid crystal display and liquid crystal panel thereof
Technical field
The invention relates to a kind of semi-penetrated semi-reflected liquid crystal display, particularly relevant for a kind of semi-penetrated semi-reflected liquid crystal display, its phase retardation film has reactive liquid crystals.
Background technology
Display panels has low power consumption and the thin characteristics of external form; Be widely used in the various electronic products; Like products such as hand-held computer, digital camera, mobile phones; Generally speaking, display panels is divided into penetration, reflective and semi-penetration semi-reflective, and penetrating LCD is to utilize module backlight as its light source; Reflective liquid-crystal display is to utilize external environment light as its light source, and semi-penetrated semi-reflected liquid crystal display is to use module backlight and external environment light as its light source simultaneously.
With reference to figure 1, colored filter substrate 20 processing flow of the liquid crystal panel 12 of known double gap (dual gap) semi-penetrated semi-reflected liquid crystal display 10 are: black-matrix layer 22 making, chromatic filter layer 24, smooth overlayer (flat over-coating; FOC) 26 making, bed hedgehopping overlayer (mask over-coating; MOC) 28 making, common electrode (common electrode) plated film 32 are made and gap (spacer) 34 is made.And when making the thin film transistor base plate 40 of liquid crystal panel 12 of semi-penetrated semi-reflected liquid crystal display 10, can use the multiple tracks light shield to make thin film transistor base plate 40.Thin film transistor base plate 40 comprises a plurality of pixel region P, and each pixel region P definition has a penetrating region T and an echo area R.Each pixel region P comprises a through electrode 42 and a reflecting electrode 44, lays respectively at this penetrating region T and echo area R.
Colored filter substrate 20, liquid crystal layer 14 and thin film transistor base plate 40 one-tenth one liquid crystal panels 12 capable of being combined.The both sides up and down of liquid crystal panel 12 need respectively add 1/4 ripple plate 52,54 and go up Polarizer 56, Polarizer 58 down, and its main purpose is because the clearance D 1 of the colored filter substrate 20 of echo area R and thin film transistor base plate 40 half the for the clearance D 2 of the colored filter substrate 20 of penetrating region T and thin film transistor base plate 40.Therefore, if selected specific gap son 34 thickness, then the liquid crystal layer 14 of echo area R can be considered 1/4 ripple plate, and the liquid crystal layer 14 of penetrating region T can be considered half-wave plate.When using the alternating expression Polarizer; The light source of module 60 backlight gets into after the liquid crystal panel 12, and the polarization direction can be revolved and turn 90 degrees through liquid crystal layer 14 time, and is parallel with the penetrating shaft of last Polarizer 56; And when surround lighting gets into echo area R; Its polarization state can change circular polarization into via liquid crystal layer 14, changes the linearly polarized light opposite with last Polarizer 56 polarization directions in the relation that reflects via liquid crystal layer 14, causes the GTG attitude in two districts just the opposite.Therefore, if R does a compensate film in the echo area, then can make the light on both sides can both pass Polarizer 56 with same linear polarization at last.But, because technique known is to use ripple plate 52 (that is 1/4 ripple plate) to fit comprehensively, not only to ripple plate 52 in the R applying of echo area, ripple plate 52 on the side of penetrating region T also can be fitted.Yet also must fitting down at the opposite side of penetrating region T, ripple plate 54 (that is 1/4 ripple plate) offsets the extra phase delay that ripple plate 52 causes.But this mode can cause the reduction of serious colour cast and contrast usually.
Therefore, just having to provide a kind of semi-penetrated semi-reflected liquid crystal display, can solve aforesaid problem.
Summary of the invention
The present invention provides a kind of semi-penetrated semi-reflected liquid crystal display, comprises a liquid crystal panel and a module backlight.Liquid crystal panel comprises a thin film transistor base plate and a colored filter substrate.Thin film transistor base plate comprises a plurality of pixel regions, and each pixel region comprises a through electrode and a reflecting electrode, and definition has a penetrating region and an echo area respectively.Colored filter substrate comprises a plurality of colorized optical filterings zone; Each colorized optical filtering zone is corresponding to this pixel region; Wherein each colorized optical filtering zone has one first district and one second district; This first district and one second district are respectively corresponding to the penetrating region and the echo area of this pixel region; Each colorized optical filtering zone comprises a phase retardation film and an overlayer, and this phase retardation film and overlayer all are positioned at this second district, and this phase retardation film has reactive liquid crystals; This phase retardation film and overlayer storehouse be together and corresponding to this echo area, makes the gap of this colored filter substrate and this thin film transistor base plate of this echo area be half of the gap of this colored filter substrate of this penetrating region and this thin film transistor base plate by this.This penetrating region and echo area are used this module backlight and the external environment light light source as it respectively.
Semi-penetrated semi-reflected liquid crystal display of the present invention mainly is to utilize this phase retardation film with reactive liquid crystals; It has the function that is same as 1/4 ripple plate; Reach suitable phase delay, to omit the use of 1/4 ripple plate up and down of known semi-penetrated semi-reflected liquid crystal display.In the colored filter substrate processing procedure of semi-penetrated semi-reflected liquid crystal display, have this phase retardation film instead flatness layer or the bed hedgehopping layer of reactive liquid crystals; Perhaps; Have reactive liquid crystals this phase retardation film can with flatness layer or bed hedgehopping layer storehouse simultaneously; So that the gap of this colored filter substrate of this echo area and this thin film transistor base plate is gap half the of this colored filter substrate and this thin film transistor base plate of this penetrating region, and reach the Presentation Function of semi-penetrated semi-reflected liquid crystal display.
In order to let above and other objects of the present invention, characteristic and the advantage can be more obvious, hereinafter will cooperate appended diagram, elaborate as follows.
Description of drawings
Fig. 1 is the diagrammatic cross-section of known semi-penetrated semi-reflected liquid crystal display;
Fig. 2 is the diagrammatic cross-section of the semi-penetrated semi-reflected liquid crystal display of the first embodiment of the present invention;
Fig. 3 is the diagrammatic cross-section of the semi-penetrated semi-reflected liquid crystal display of another embodiment of the present invention;
Fig. 4 is the diagrammatic cross-section of the semi-penetrated semi-reflected liquid crystal display of the second embodiment of the present invention; And
Fig. 5 is the diagrammatic cross-section of the semi-penetrated semi-reflected liquid crystal display of the third embodiment of the present invention.
Embodiment
Fig. 2 shows the semi-penetrated semi-reflected liquid crystal display 110 of the first embodiment of the present invention.Semi-penetrated semi-reflected liquid crystal display 110 comprises a liquid crystal panel 112 and a module 160 backlight.Liquid crystal panel 112 comprises a thin film transistor base plate 140 and a colored filter substrate 120.One liquid crystal layer 114 is disposed between this thin film transistor base plate 140 and the colored filter substrate 120.
Thin film transistor base plate 140 comprises a plurality of pixel region P.Each pixel region P definition has a penetrating region T PAn and echo area R PNormally, pixel region P is the zone that adjacent two sweep traces (figure does not show) and adjacent two data lines (figure does not show) are surrounded, and a thin film transistor (TFT) (figure does not show) position is in pixel region.Each pixel region P comprises a through electrode 142 and a reflecting electrode 144, lays respectively at this penetrating region T PAnd echo area R P
Colored filter substrate 120 comprises a plurality of colorized optical filterings zone P ', and each regional P ' is corresponding to this pixel region P.Each colorized optical filtering zone P ' has one first district T P 'And one second district R P ', correspond respectively to the penetrating region T of this pixel region P PAnd echo area R PEach colorized optical filtering zone P ' comprises a phase retardation film 127 and an overlayer (over-coating) 129, and phase retardation film 127 and overlayer 129 all are positioned at this second district R P 'This phase retardation film 127 has reactive liquid crystals (Reactive Mesogen; RM), this phase retardation film 127 and overlayer 129 storehouses are together and corresponding to this echo area R P, make this echo area R by this PThe clearance D 1 of this colored filter substrate 120 and this thin film transistor base plate 140 be this penetrating region T PClearance D 2 half the of this colored filter substrate 120 and this thin film transistor base plate 140.This penetrating region T PAnd echo area R PRespectively by this module 160 backlight and an external environment light as light source.Each directly disposes Polarizer 156, following Polarizer 158 both sides up and down of liquid crystal panel 112.
With regard to phase retardation film 127 of the present invention, reactive liquid crystals material capable of using forms with wet type coating (wet-coating) mode.As the detailed speech, one of which is that the potpourri that includes reactive liquid crystals material and light initiator (photo-initiator) is covered in desired position, makes its generation photopolymerization reaction via light shield with UV-irradiation then.By the temperature and the thickness of its cross coupled of control (cross-link), to obtain the phase retardation film 127 that required phase-delay value distributes, the similar products of the product reactive liquid crystals RM of representative example such as Merck (Merck) company.
Function with this phase retardation film 127 of reactive liquid crystals is meant that light passes through these phase retardation film 127 back electric fields along quick shaft direction (fast axis) vibration velocity ratio slow-axis direction (slow axis) vibration velocity very fast 1/4 wavelength vertical with this quick shaft direction.
As shown in Figure 2, in the present embodiment, 129 of this overlayers comprise a bed hedgehopping overlayer 129a, and this bed hedgehopping overlayer 129a covers this phase retardation film 127.Bed hedgehopping overlayer 129a typically refers to the second district R that can increase colored filter substrate 120 P 'The resin bed of thickness.With regard to phase retardation film 127 THICKNESS CONTROL, in order to make echo area R PThe clearance D 1 of colored filter substrate 120 and thin film transistor base plate 140 be penetrating region T PClearance D 2 half the of colored filter substrate 120 and thin film transistor base plate 140; The reactive liquid crystals thickness of this phase retardation film 127 of may command is greater than these overlayer 129 thickness; And control the temperature of reaction of a cross-linking reaction, to obtain to meet the phase retardation film 127 that required phase-delay value distributes.As shown in Figure 3, in another embodiment, this overlayer 129 comprises a bed hedgehopping overlayer 129b, and this bed hedgehopping overlayer 129b covers this phase retardation film 127 '.With regard to bed hedgehopping overlayer 129b THICKNESS CONTROL, in order to make echo area R PThe clearance D 1 of colored filter substrate 120 and thin film transistor base plate 140 be penetrating region T PClearance D 2 half the of colored filter substrate 120 and thin film transistor base plate 140; These overlayer 129 thickness of may command are greater than the reactive liquid crystals thickness of this phase retardation film 127 '; And control the temperature of reaction of another cross-linking reaction, to obtain the phase retardation film 127 ' that required phase-delay value distributes.
Again with reference to figure 2; In the present embodiment; Each colorized optical filtering zone P ' of this colored filter substrate 120 also comprises a transparency carrier 121 and a black-matrix layer 122; This black-matrix layer 122 is disposed at this transparency carrier 121 surfaces, and this phase retardation film 127 covers this black-matrix layer 122 and transparency carrier 121.Each colorized optical filtering zone P ' of this colored filter substrate 120 also comprises a chromatic filter layer 124 and community electrode plated film 132; This chromatic filter layer 124 is disposed at this transparency carrier 121 surfaces, and this common electrode plated film 132 covers this chromatic filter layer 124, this phase retardation film 127 and this overlayer 129.One gap 134 is in order to keep the gap of this colored filter substrate 120 and this thin film transistor base plate 140.
Because echo area R PThe gap of colored filter substrate 120 and thin film transistor base plate 140 be penetrating region T PGap half the of colored filter substrate and thin film transistor base plate.Therefore, if selected specific gap sub 134 thickness, then echo area R P Liquid crystal layer 114 can be considered 1/4 ripple plate, and penetrating region T P Liquid crystal layer 114 can be considered half-wave plate.When using the alternating expression Polarizer, the light source of module 160 backlight gets into after the liquid crystal panel 112, and the polarization direction can be revolved and turn 90 degrees through liquid crystal layer 114 time, and is parallel with the penetrating shaft of last Polarizer 156, and as surround lighting entering echo area R PThe time, its polarization state can change circular polarization into via liquid crystal layer 114, changes the linearly polarized light opposite with last Polarizer 156 polarization directions in the relation that reflects via liquid crystal layer 114, causes the GTG attitude in two districts just the opposite.Because R in the echo area PThis phase retardation film 127 that configuration has reactive liquid crystals; It has the characteristic that is similar to 1/4 ripple plate; To omit the use of 1/4 ripple plate up and down of known semi-penetrated semi-reflected liquid crystal display, therefore can make the light on both sides can both pass Polarizer 156 with same linear polarization at last.
Fig. 4 shows the semi-penetrated semi-reflected liquid crystal display 210 of the second embodiment of the present invention.Semi-penetrated semi-reflected liquid crystal display 210 comprises a liquid crystal panel 212 and a module 260 backlight.Liquid crystal panel 212 comprises a thin film transistor base plate 240 and a colored filter substrate 220.One liquid crystal layer 214 is disposed between this thin film transistor base plate 240 and the colored filter substrate 220.Each directly disposes Polarizer 256, following Polarizer 258 both sides up and down of liquid crystal panel 212.Each pixel region P of thin film transistor base plate 240 comprises a through electrode 242 and a reflecting electrode 244.Each colorized optical filtering zone P ' of this colored filter substrate 220 comprises a transparency carrier 221, a black-matrix layer 222, a chromatic filter layer 224 and community electrode plated film 232.One gap 234 is in order to keep the gap of this colored filter substrate 220 and this thin film transistor base plate 240.The semi-penetrated semi-reflected liquid crystal display 210 of second embodiment is similar to the semi-penetrated semi-reflected liquid crystal display 110 of first embodiment substantially, and similar assembly indicates similar label.
The semi-penetrated semi-reflected liquid crystal display difference of second and first embodiment is: each colorized optical filtering zone P ' comprises a phase retardation film 227 and an overlayer 229; 229 of this overlayers comprise a smooth overlayer 229a; This smooth overlayer 229a covers this black-matrix layer 222 and transparency carrier 221, and this phase retardation film 227 covers this smooth overlayer 229a.Smooth overlayer 229a typically refers to the second district R that can increase colored filter substrate 220 P 'The resin bed of flatness.
This phase retardation film 227 has reactive liquid crystals, and this phase retardation film 227 and overlayer 229 storehouses are together and corresponding to this echo area R P, make this echo area R by this PThe clearance D 1 of this colored filter substrate 220 and this thin film transistor base plate 240 be this penetrating region T PClearance D 2 half the of this colored filter substrate 220 and this thin film transistor base plate 240.
Fig. 5 shows the semi-penetrated semi-reflected liquid crystal display 310 of the third embodiment of the present invention.Semi-penetrated semi-reflected liquid crystal display 310 comprises a liquid crystal panel 312 and a module 360 backlight.Liquid crystal panel 312 comprises a thin film transistor base plate 340 and a colored filter substrate 320.One liquid crystal layer 314 is disposed between this thin film transistor base plate 340 and the colored filter substrate 320.Each directly disposes Polarizer 356, following Polarizer 358 both sides up and down of liquid crystal panel 312.Each pixel region P of thin film transistor base plate 340 comprises a through electrode 342 and a reflecting electrode 344.Each colorized optical filtering zone P ' of this colored filter substrate 320 comprises a transparency carrier 321, a black-matrix layer 322, a chromatic filter layer 324 and community electrode plated film 332.One gap 334 is in order to keep the gap of this colored filter substrate 320 and this thin film transistor base plate 340.The semi-penetrated semi-reflected liquid crystal display 310 of the 3rd embodiment is similar to the semi-penetrated semi-reflected liquid crystal display 110 of first embodiment substantially, and similar assembly indicates similar label.
The semi-penetrated semi-reflected liquid crystal display difference of the 3rd and first embodiment is: each colorized optical filtering zone P ' comprises a phase retardation film 327 and an overlayer 329; This overlayer 329 comprises a smooth overlayer 329a and a bed hedgehopping overlayer 329b simultaneously; This smooth overlayer 329a covers this black-matrix layer 322 and transparency carrier 321; This phase retardation film 327 covers this smooth overlayer 329a, and this bed hedgehopping overlayer 329b covers this phase retardation film 327.
This phase retardation film 327 has reactive liquid crystals, and this phase retardation film 327 and overlayer 329 storehouses are together and corresponding to this echo area R P, make this echo area R by this PThe clearance D 1 of this colored filter substrate 320 and this thin film transistor base plate 340 be this penetrating region T PClearance D 2 half the of this colored filter substrate 320 and this thin film transistor base plate 340.
Semi-penetrated semi-reflected liquid crystal display of the present invention mainly is to utilize this phase retardation film with reactive liquid crystals; It has the function that is same as 1/4 ripple plate; Reach suitable phase delay, to omit the use of 1/4 ripple plate up and down of known semi-penetrated semi-reflected liquid crystal display.In the colored filter substrate processing procedure of semi-penetrated semi-reflected liquid crystal display, have the known smooth overlayer of this phase retardation film instead or the bed hedgehopping overlayer of reactive liquid crystals; Perhaps; Have reactive liquid crystals this phase retardation film can with smooth overlayer or bed hedgehopping overlayer storehouse simultaneously; So that the gap of this colored filter substrate of this echo area and this thin film transistor base plate is gap half the of this colored filter substrate and this thin film transistor base plate of this penetrating region, and reach the Presentation Function of semi-penetrated semi-reflected liquid crystal display.
In sum, be only notebook invention for presenting the embodiment or the embodiment of the technological means that adopted of dealing with problems, be not to be used for limiting patent working pixel coverage of the present invention.Be that patent claim context all and of the present invention conforms to, or change and modification, be all claim of the present invention and contain according to the equalization that claim of the present invention is done.

Claims (10)

1. a semi-penetrated semi-reflected liquid crystal display is characterized in that, comprises:
One liquid crystal panel comprises:
One thin film transistor base plate comprises a plurality of pixel regions, and each pixel region definition has a penetrating region and an echo area; And
One colored filter substrate; Comprise a plurality of colorized optical filterings zone; Each colorized optical filtering zone is corresponding to this pixel region; Wherein each colorized optical filtering zone has one first district and one second district, and corresponding to the penetrating region and the echo area of this pixel region, each colorized optical filtering zone comprises a phase retardation film and an overlayer respectively for this first district and one second district; This phase retardation film and overlayer all are positioned at this second district; This phase retardation film has reactive liquid crystals, and this phase retardation film and overlayer storehouse be together and corresponding to this echo area, makes the gap of this colored filter substrate and this thin film transistor base plate of this echo area be half of the gap of this colored filter substrate of this penetrating region and this thin film transistor base plate by this; And
One module backlight, wherein this penetrating region and echo area respectively by this module backlight and an external environment light as light source.
2. semi-penetrated semi-reflected liquid crystal display as claimed in claim 1; It is characterized in that; Each colorized optical filtering zone of this colored filter substrate also comprises a transparency carrier and a black-matrix layer, and this black-matrix layer is disposed at this transparency carrier surface, and this phase retardation film covers this black-matrix layer and transparency carrier; And this overlayer comprises a bed hedgehopping overlayer, and this bed hedgehopping overlayer covers this phase retardation film.
3. semi-penetrated semi-reflected liquid crystal display as claimed in claim 1; It is characterized in that; Each colorized optical filtering zone of this colored filter substrate also comprises a transparency carrier and a black-matrix layer, and this black-matrix layer is disposed at this transparency carrier surface, and this overlayer comprises a smooth overlayer; This smooth overlayer covers this black-matrix layer and transparency carrier, and this phase retardation film covers this smooth overlayer.
4. semi-penetrated semi-reflected liquid crystal display as claimed in claim 1; It is characterized in that each colorized optical filtering zone of this colored filter substrate also comprises a transparency carrier and a black-matrix layer, this black-matrix layer is disposed at this transparency carrier surface; This overlayer comprises a smooth overlayer and a bed hedgehopping overlayer; This smooth overlayer covers this black-matrix layer and transparency carrier, and this phase retardation film covers this smooth overlayer, and this bed hedgehopping overlayer covers this phase retardation film.
5. semi-penetrated semi-reflected liquid crystal display as claimed in claim 1; It is characterized in that, the function with this phase retardation film of reactive liquid crystals be meant light pass through behind this phase retardation film electric field along the quick shaft direction vibration velocity than slow-axis direction vibration velocity very fast 1/4 wavelength vertical with this quick shaft direction.
6. semi-penetrated semi-reflected liquid crystal display as claimed in claim 1 is characterized in that, the reactive liquid crystals thickness of this phase retardation film is greater than this cover thickness.
7. semi-penetrated semi-reflected liquid crystal display as claimed in claim 1 is characterized in that, this cover thickness is greater than the reactive liquid crystals thickness of this phase retardation film.
8. a liquid crystal panel is characterized in that, comprises:
One thin film transistor base plate comprises a plurality of pixel regions, and each pixel region definition has a penetrating region and an echo area; And
One colored filter substrate; Comprise a plurality of colorized optical filterings zone; Each colorized optical filtering zone is corresponding to this pixel region; Wherein each colorized optical filtering zone has one first district and one second district, and corresponding to the penetrating region and the echo area of this pixel region, each colorized optical filtering zone comprises a phase retardation film and an overlayer respectively for this first district and one second district; This phase retardation film and overlayer all are positioned at this second district; This phase retardation film has reactive liquid crystals, and this phase retardation film and overlayer storehouse be together and corresponding to this echo area, makes the gap of this colored filter substrate and this thin film transistor base plate of this echo area be half of the gap of this colored filter substrate of this penetrating region and this thin film transistor base plate by this.
9. liquid crystal panel as claimed in claim 8 is characterized in that, the reactive liquid crystals thickness of this phase retardation film is greater than this cover thickness.
10. liquid crystal panel as claimed in claim 8 is characterized in that, this cover thickness is greater than the reactive liquid crystals thickness of this phase retardation film.
CN2012101064181A 2012-04-12 2012-04-12 Semi-penetration and semi-reflection liquid crystal display and liquid crystal panel of semi-penetration and semi-reflection liquid crystal display Pending CN102662272A (en)

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JP2009122716A (en) * 2009-03-12 2009-06-04 Epson Imaging Devices Corp Liquid crystal display
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CN101960365A (en) * 2008-03-11 2011-01-26 夏普株式会社 Liquid crystal display device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040233359A1 (en) * 2003-05-23 2004-11-25 Lg. Philips Lcd Co., Ltd. Transflective liquid crystal display device and fabricating method thereof
KR20040107938A (en) * 2003-06-16 2004-12-23 대한민국(전북대학교 총장) Transflective Liquid Crystal Display
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Application publication date: 20120912