CN110850657A - Cholesteric phase color liquid crystal display screen for improving contrast by using black matrix and method thereof - Google Patents
Cholesteric phase color liquid crystal display screen for improving contrast by using black matrix and method thereof Download PDFInfo
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- CN110850657A CN110850657A CN201911166589.1A CN201911166589A CN110850657A CN 110850657 A CN110850657 A CN 110850657A CN 201911166589 A CN201911166589 A CN 201911166589A CN 110850657 A CN110850657 A CN 110850657A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13718—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a change of the texture state of a cholesteric liquid crystal
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1341—Filling or closing of cells
Abstract
The invention relates to a cholesteric phase color liquid crystal display screen for improving contrast by utilizing a black matrix, wherein each layer of cholesteric phase liquid crystal display box is structurally characterized in that upper and lower ITO glass is fixed to form a glass liquid crystal box, an ITO layer is arranged in the ITO glass layer and etched into a required pattern, cholesteric phase liquid crystals with the wavelength ranges of 760 to 622, 577 to 492 and 450 to 435 nanometers are respectively added between the ITO layers, a black matrix BM is photoetched in a pattern gap of the upper ITO layer to shield a gap in the middle of the required pattern, a liquid crystal alignment film is coated on the ITO glass, and the three layers of cholesteric phase liquid crystal display boxes are formed by ACF binding. And the 'RGB' cholesteric phase color liquid crystal display screen is formed by sequentially laminating and fixing OC glue. The advantages are that: the gaps of the ITO electrodes among the pixels are exposed and etched to form black matrixes, so that the gap light among the pixels and the light residues at the edges of the R, G and B pixels can be effectively shielded. The contrast of the cholesteric color liquid crystal display screen is greatly improved, and the optical lines can be manufactured by the conventional LCD production, so that the production is convenient.
Description
Technical Field
The invention discloses a cholesteric phase color liquid crystal display screen and a method thereof, which utilize a black matrix to improve contrast, and belongs to the technical field of liquid crystal display screens.
Background
Each dot displayed in a color cholesteric liquid crystal panel is a pixel. It is composed of three sub-pixels of R pixel in R-layer cholesteric liquid crystal display box, G pixel in G-layer cholesteric liquid crystal display box and B pixel in B-layer cholesteric liquid crystal display box. The liquid crystal in each liquid crystal cell can display different brightness levels. Each displayed color point in the color cholesteric liquid crystal screen consists of three sub-pixels of 'R', 'G' and 'B' with different brightness levels. That is, the color change of each point in the color cholesteric liquid crystal screen is formed by the different brightness level changes of three sub-pixels of 'R', 'G' and 'B'.
Since the RGB three primary colors at the edge of a pixel generate the defect of reverse tilt orientation when the transverse electric field between pixel electrodes in a cholesteric liquid crystal box acts, the contrast of an image is reduced, and the black matrix is adopted to cover the parts, so that the reduction of the display quality caused by the problem is avoided.
Disclosure of Invention
The invention provides a cholesteric color liquid crystal display screen and a method thereof for improving contrast by utilizing a black matrix, aiming at overcoming the defects in the prior art, the cholesteric color liquid crystal display screen is manufactured by utilizing a method for improving the contrast of a passive cholesteric color liquid crystal display screen by utilizing a shading black matrix, and the black matrix is formed by exposing and etching gaps of ITO electrodes among pixels, so that the black matrix effectively covers the light transmission of the gaps among the pixels, and the contrast of the cholesteric color liquid crystal display screen is improved.
The technical solution of the invention is as follows: the cholesteric phase color liquid crystal display screen for improving the contrast by utilizing the black matrix structurally comprises an R-layer cholesteric phase liquid crystal display box A, a G-layer cholesteric phase liquid crystal display box B and a B-layer cholesteric phase liquid crystal display box C, wherein the R-layer cholesteric phase liquid crystal display box A, the G-layer cholesteric phase liquid crystal display box B and the B-layer cholesteric phase liquid crystal display box C are sequentially attached and fixed into an RGB (red, green and blue) cholesteric phase color liquid crystal display screen through OC (alpha) glue 12 respectively; the display specifically comprises frame glue 1, upper ITO glass 2, an upper ITO layer 3, an upper alignment film 4, a black matrix 5, a liner 6, a lower ITO layer 7, a lower alignment film 8, lower ITO glass 9, an anisotropic conductive adhesive tape 10, a drive chip 11, OC glue 12, "RED" cholesteric liquid crystal 13, "GREEN" cholesteric liquid crystal 14, "BLUE" cholesteric liquid crystal 15 and a black light absorption film 16; the structure of the R-layer cholesteric liquid crystal display box A is that an upper ITO glass 2 and a lower ITO glass 9 are fixed through a frame adhesive 1 and a liner 6 to form a glass liquid crystal box, an upper ITO layer 3 is arranged below the upper ITO glass 2, a lower ITO layer 7 is arranged above the lower ITO glass 9, a RED cholesteric liquid crystal 13 with the wavelength range of 760 nanometers to 622 nanometers is arranged between the upper ITO layer 3 and the lower ITO layer 7, the upper ITO layer 3 and the lower ITO layer 7 are etched into required patterns, a black matrix 5 is photoetched in a pattern gap of the upper ITO layer 3 to cover a gap in the middle of the required pattern, an upper alignment film 4 and a lower alignment film 8 are respectively coated on the upper ITO glass 2 and the lower ITO glass 9 provided with the black matrix 5, and a flexible circuit 11 is bound on the lower ITO layer 7 of the lower ITO glass 9 through an anisotropic conductive adhesive tape to form the R-layer cholesteric liquid crystal display box A;
the structures of the cholesteric liquid crystal display box B with the layer G and the cholesteric liquid crystal display box C with the layer B are the same as those of the cholesteric liquid crystal display box A with the layer R, but GREEN cholesteric liquid crystals 14 with the wavelength range of 577 nanometers to 492 nanometers are arranged between an upper ITO layer and a lower ITO layer in the cholesteric liquid crystal display box B with the layer G, and BLUE cholesteric liquid crystals 15 with the wavelength range of 450 nanometers to 435 nanometers are arranged between the upper ITO layer and the lower ITO layer in the cholesteric liquid crystal display box C with the layer B; the lower surface of the cholesteric liquid crystal display box C of the layer B is attached with a black light absorption film 16.
The thickness of the glass liquid crystal box in the R layer cholesteric liquid crystal display box B is 6.0 um; the thickness of the glass liquid crystal box in the G-layer cholesteric liquid crystal display box B is 4.5 um; the thickness of the glass liquid crystal box in the B layer cholesteric liquid crystal display box C is 4.0 um.
The upper alignment film 4 and the lower alignment film 8 are formed by coating 70% SE3310 liquid crystal alignment liquid and then heating and curing, and the thickness is 700 angstroms.
The type of the frame glue is XN-5A-C, and the thickness is 8 um; the type of the liner in the R-layer cholesteric liquid crystal display box A is NM-HS 060, the diameter is 6.0 um, and the density is 300 pieces/mm2(ii) a The type of the liner in the G layer cholesteric phase display box B is NMASE 045, the diameter of the liner is 4.5 um, and the density of the liner is 300 pieces/mm2(ii) a The type of the liner in the B-layer cholesteric liquid crystal display box C is NMASE 040, the diameter is 4.0um, and the density is 300 pieces/mm2。
The 'RED' cholesteric liquid crystal 13 is RDP-A3133CH 4 type cholesteric liquid crystal, the 'GREEN' cholesteric liquid crystal 14 is RDP-A3133CH2 type cholesteric liquid crystal, and the 'BLUE' cholesteric liquid crystal 15 is RDP-A3123CH2 type cholesteric liquid crystal.
The model of the anisotropic conductive adhesive tape is CP9731, and the model of the driving chip is TCP UCI 7702C.
The black light absorption film 16 is BM-818.
The preparation method is characterized by comprising the following steps:
(A) respectively manufacturing R, G and B layer glass liquid crystal display boxes:
1) respectively forming required patterns on the ITO layers by exposure and etching on the two pieces of ITO glass;
2) coating BM glue on the upper ITO glass with the photoetched pattern, and photoetching to form a required black matrix after the BM glue is sleeved with the pattern MARK on the upper ITO glass through a photomask;
3) coating liquid crystal alignment liquid on one piece of ITO glass with an etched ITO pattern and the other piece of glass with a photo-etched black matrix, and heating to cure to form a liquid crystal alignment film;
4) screen printing frame glue on the periphery of the glass, spraying a liner on the glass, bonding the two pieces of glass together, and hot-pressing and firing to solidify the frame glue to form an R-layer glass liquid crystal empty box;
5) injecting cholesteric liquid crystal into the glass liquid crystal empty box by using a vacuum injection method, coating sealing glue on an injection port, and then carrying out ultraviolet curing;
6) cleaning the liquid crystal box injected with the liquid crystal by using ultrasonic waves and cleaning fluid, and binding a driving chip by using an anisotropic conductive adhesive tape;
(B) sequentially sticking the manufactured R-layer liquid crystal display box, G-layer liquid crystal display box and B-layer liquid crystal display box together through OC glue;
(C) and a black light absorption film is attached to the lower surface of the B-layer ultrathin glass liquid crystal display box.
The invention has the beneficial effects that:
the light ray of the gaps between the pixels and the light ray residue at the edges of the pixels of R, G and B can be effectively shielded. The contrast of the cholesteric color liquid crystal display screen is greatly improved, so that the display color is real, the layers are clear, and the boundaries are clear and not fuzzy. The optical lines can be manufactured by the conventional LCD, and the production is convenient.
Drawings
FIG. 1 is a schematic structural diagram of a cholesteric color LCD screen manufactured by a method for improving the contrast of a passive cholesteric color LCD screen by using a shading black matrix.
Fig. 2 is a schematic diagram of a black matrix.
In the figure, 1 is frame glue, 2 is upper ITO glass, 3 is upper ITO layer, 4 is upper alignment film, 5 is black matrix BM, 6 is liner, 7 is lower ITO layer, 8 is lower alignment film, 9 is lower ITO glass, 10 is ACF, 11 is IC TCP, 12 is OC glue, 13 is "RED" cholesteric liquid crystal, 14 is "GREEN" cholesteric liquid crystal, 15 is "BLUE" cholesteric liquid crystal, 16 is black light absorption film, A is "R" layer cholesteric liquid crystal display box, B is "G" layer cholesteric liquid crystal display box, C is "B" layer cholesteric liquid crystal display box.
Detailed Description
The black matrix is formed by exposing and etching the gaps of the ITO electrodes among the pixels, so that the black matrix effectively covers the light transmission of the gaps among the pixels, and the contrast of the cholesteric color liquid crystal display screen is improved. However, due to the existence of the gap, the phenomenon of exposure occurs between the pixels, and the color of the RGB three primary colors is distorted when the color is mixed, thereby influencing the contrast of the cholesteric color liquid crystal display screen. The black matrix can effectively cover gaps among the pixels, so that the RGB three primary colors in the pixels are not influenced by external light when being displayed, and the contrast of the passive cholesteric color liquid crystal display screen is improved.
The technical scheme of the invention is further explained by combining the attached drawings
As shown in attached fig. 1 and 2, the cholesteric color liquid crystal display screen is manufactured by the method for improving the contrast of the passive cholesteric color liquid crystal display screen by using the shading black matrix. The structure of the liquid crystal display panel comprises frame glue 1, upper ITO glass 2, an upper ITO layer 3, an upper alignment film 4, a black matrix BM5, a liner 6, a lower ITO layer 7, a lower alignment film 8, lower ITO glass 9, ACF10, IC TCP11, OC glue 12, "RED" cholesteric liquid crystal 13, "GREEN" cholesteric liquid crystal 14, "BLUE" cholesteric liquid crystal 15 and a black light absorption film 16. The liquid crystal display comprises an R ' layer cholesteric liquid crystal display box A, a G ' layer cholesteric liquid crystal display box B and a B ' layer cholesteric liquid crystal display box C.
The R-layer cholesteric liquid crystal display box A, the G-layer cholesteric liquid crystal display box B and the B-layer cholesteric liquid crystal display box C are sequentially attached and fixed into an RGB-layer cholesteric color liquid crystal display screen through OC glue 12 respectively, wherein the R-layer cholesteric liquid crystal display box A is structurally characterized in that upper ITO glass 2 and lower ITO glass 9 are fixed through frame glue 1 and a gasket 6 to form a glass liquid crystal box with the thickness of 6.0 um in the box, an upper ITO layer 3 is arranged below the upper ITO glass 2, a lower ITO layer 7 is arranged above the lower ITO glass 9, cholesteric liquid crystal 13 with the wavelength of RED (wavelength range from 760 nanometers to 622 nanometers) is added between the upper ITO layer 3 and the lower ITO layer 7, the upper ITO layer 3 and the lower ITO layer 7 are etched into required patterns, a black matrix BM5 is etched in the pattern gaps of the upper ITO layer 3 in a pattern aligning mode of a photomask and an aligning mode of the pattern alignment with the upper ITO layer 3 to shield the gaps in the required patterns, an upper alignment film 4 and a lower alignment film 8 are coated on the upper ITO glass 2 (having the black matrix BM layer) and the lower ITO glass 9. A flexible circuit IC TCP11 is bound on the lower ITO layer 7 of the lower ITO glass 9 through an anisotropic conductive adhesive tape ACF10, and an 'R' layer cholesteric liquid crystal display box A is formed. The structures of the cholesteric liquid crystal display box B and the cholesteric liquid crystal display box C of the G layer are consistent with that of the cholesteric liquid crystal display box A of the R layer, but the thicknesses in the cholesteric liquid crystal display box B of the G layer and the cholesteric liquid crystal display box C of the B layer are respectively 4.5 um and 4.0um, the cholesteric liquid crystal 14 with the wavelength of GREEN (the wavelength range is 577 nm to 492 nm) and the cholesteric liquid crystal 15 with the wavelength of BLUE (the wavelength range is 450 nm to 435 nm) are respectively added between the upper ITO layer and the lower ITO layer, and then the flexible circuit CP ICT 11 is respectively bound by the anisotropic conductive adhesive tape 10. And finally, attaching a black light-absorbing film 16 to the lower surface of the B-layer cholesteric liquid crystal display box C.
Example 1
Firstly, making R-layer glass liquid crystal display box
1) And respectively forming required patterns on the ITO layers by exposure and etching on the two pieces of ITO glass.
2) And (3) coating BM glue BKP4208 on the upper ITO glass with the photoetched pattern, and photoetching to form a required black matrix after the pattern BKP4208 is sleeved with the pattern MARK on the upper ITO glass through a photomask.
3) Coating liquid crystal alignment solution 70% SE3310 with thickness of 700 angstroms on one piece of ITO glass with etched ITO pattern and another piece of glass with black matrix, and heating to 180 deg.CoC, forming a liquid crystal alignment film after curing.
4) Printing frame glue XN-5A-C with a thickness of 8 um on the periphery of the glass by screen printing, and spraying 6.0 um diameter liner NM-HS 060 with a density of 300 pieces/mm on the glass2And adhering the two pieces of glass together. And (5) hot pressing and sintering at 180 ℃ to solidify the frame glue. Forming an 'R' layer glass liquid crystal empty box.
5) The empty box of the R-layer glass liquid crystal is injected with cholesteric liquid crystal RDP-A3133CH 4 by a vacuum injection method. The injection port was coated with a sealing compound 3781 and then uv cured.
6) And cleaning the liquid crystal box injected with the liquid crystal by using ultrasonic waves and cleaning liquid, and binding the IC TCP UCI7702C through the anisotropic conductive adhesive tape ACF CP 9731.
Secondly, manufacturing a G-layer ultrathin glass liquid crystal display box and a B-layer ultrathin glass liquid crystal display box
1) As above for "R" layer methods 1), 2), 3).
2) The difference from the R is that: respectively spraying 4.5 um diameter pad NM ASE045 on glass by G, spraying 4.0um diameter pad NM ASE040 on glass by B, the density is 300 pieces/mm2。
3) And respectively injecting cholesteric liquid crystals RDP-A3133CH2 and RDP-A3123CH2 into the 'G' layer glass liquid crystal empty box and the 'B' layer glass liquid crystal empty box by using a vacuum injection method. The injection port was coated with a sealing compound 3781 and then uv cured.
4) The ICTCP UCI7702C is bound to the G layer and the B layer through an anisotropic conductive adhesive tape ACF CP9731 in the same way as the R layer method.
And thirdly, sequentially sticking the manufactured R-layer liquid crystal display box, G-layer liquid crystal display box and B-layer liquid crystal display box together through OC glue.
And fourthly, finally, attaching a BM black reflecting film BM-818 to the lower surface of the B layer ultrathin glass liquid crystal display box.
Claims (8)
1. The cholesteric phase color liquid crystal display screen is characterized in that the cholesteric phase color liquid crystal display screen structurally comprises an R layer cholesteric phase liquid crystal display box A, a G layer cholesteric phase display box B and a B layer cholesteric phase liquid crystal display box C, wherein the R layer cholesteric phase liquid crystal display box A, the G layer cholesteric phase liquid crystal display box B and the B layer cholesteric phase liquid crystal display box C are sequentially attached and fixed into an RGB (red, green and blue) cholesteric phase color liquid crystal display screen through OC (12) respectively; the display specifically comprises frame glue (1), upper ITO glass (2), an upper ITO layer (3), an upper alignment film (4), a black matrix (5), a liner (6), a lower ITO layer (7), a lower alignment film (8), lower ITO glass (9), an anisotropic conductive adhesive tape (10), a driving chip (11), "RED" cholesteric liquid crystal (13), "GREEN" cholesteric liquid crystal (14), "BLUE" cholesteric liquid crystal (15) and a black light absorption film (16); wherein the structure of the R-layer cholesteric liquid crystal display box A is that an upper ITO glass (2) and a lower ITO glass (9) are fixed by a frame glue (1) and a gasket (6) to form a glass liquid crystal box, the upper ITO layer (3) is arranged below the upper ITO glass (2), the lower ITO glass (9) is provided with a lower ITO layer (7), an RED cholesteric liquid crystal (13) with the wavelength range of 760 nanometers to 622 nanometers is arranged between the upper ITO layer (3) and the lower ITO layer (7), the upper ITO layer (3) and the lower ITO layer (7) are etched into required patterns, a black matrix (5) is photoetched in a pattern gap of the upper ITO layer (3) to cover a gap in the middle of the required pattern, an upper alignment film (4) and a lower alignment film (8) are respectively coated on the upper ITO glass (2) and the lower ITO glass (9) provided with the black matrix (5), and a flexible circuit (11) is bound on the lower ITO layer (7) of the lower ITO glass (9) through anisotropy, forming an R layer cholesteric liquid crystal display box A;
the structure of the cholesteric liquid crystal display box B with the layer G and the cholesteric liquid crystal display box C with the layer B are the same as that of the cholesteric liquid crystal display box A with the layer R, but the layer A of the cholesteric liquid crystal display box B with the layer G is provided with the GREEN cholesteric liquid crystal (14) with the wavelength range of 577 nanometers to 492 nanometers between the upper ITO layer and the lower ITO layer, and the layer B of the cholesteric liquid crystal display box C with the layer B is provided with the BLUE cholesteric liquid crystal (15) with the wavelength range of 450 nanometers to 435 nanometers between the upper ITO layer and the lower ITO layer;
a black light-absorbing film (16) is attached to the lower surface of the B layer cholesteric liquid crystal display box C.
2. The cholesteric color liquid crystal display screen using a black matrix to improve contrast according to claim 1, wherein the thickness of the inside of the glass liquid crystal cell in the "R" layer cholesteric liquid crystal display cell B is 6.0 um; the thickness of the glass liquid crystal box in the G-layer cholesteric liquid crystal display box B is 4.5 um; the thickness of the glass liquid crystal box in the B layer cholesteric liquid crystal display box C is 4.0 um.
3. The cholesteric color liquid crystal display screen using the black matrix to improve the contrast according to claim 1, wherein the upper alignment film (4) and the lower alignment film (8) are formed by coating 70% SE3310 liquid crystal alignment liquid and then heating and curing, and the thickness is 700 angstroms.
4. The cholesteric color liquid crystal display using the black matrix to improve contrast according to claim 1, wherein the sealant has a type XN-5A-C and a thickness of 8 um; the type of the liner in the R-layer cholesteric liquid crystal display box A is NM-HS 060, the diameter is 6.0 um, and the density is 300 pieces/mm（2）(ii) a The type of the liner in the G layer cholesteric phase display box B is NMASE 045, the diameter is 4.5 um, and the density is 300 pieces/mm2(ii) a The type of the liner in the B-layer cholesteric liquid crystal display box C is NMASE 040, the diameter is 4.0um, and the density is 300 pieces/mm（2）。
5. The cholesteric color liquid crystal display screen using a black matrix to improve contrast according to claim 1, wherein the "RED" cholesteric liquid crystal (13) is RDP-a3133CH 4 type cholesteric liquid crystal, "GREEN" cholesteric liquid crystal (14) is RDP-a3133CH2 type cholesteric liquid crystal, "BLUE" cholesteric liquid crystal (15) is RDP-a3123CH2 type cholesteric liquid crystal.
6. The cholesteric color liquid crystal display panel with the contrast enhanced by the black matrix of claim 1, wherein the anisotropic conductive paste is CP9731 and the driving chip is UCI 7702C.
7. The cholesteric color liquid crystal display using a black matrix to improve contrast according to claim 1, wherein said black light absorbing film (16) is BM-818.
8. The method of manufacturing a cholesteric color liquid crystal display panel having an improved contrast ratio using a black matrix as set forth in claim 1, comprising the steps of:
(A) respectively manufacturing R, G and B layer glass liquid crystal display boxes:
1) respectively forming required patterns on the ITO layers by exposure and etching on the two pieces of ITO glass;
2) coating BM glue on the upper ITO glass with the photoetched pattern, and photoetching to form a required black matrix after the BM glue is sleeved with the pattern MARK on the upper ITO glass through a photomask;
3) coating liquid crystal alignment liquid on one piece of ITO glass with an etched ITO pattern and the other piece of glass with a photo-etched black matrix, and heating to cure to form a liquid crystal alignment film;
4) screen printing frame glue on the periphery of the glass, spraying a liner on the glass, bonding the two pieces of glass together, and hot-pressing and firing to solidify the frame glue to form an R-layer glass liquid crystal empty box;
5) injecting cholesteric liquid crystal into the glass liquid crystal empty box by using a vacuum injection method, coating sealing glue on an injection port, and then carrying out ultraviolet curing;
6) cleaning the liquid crystal box injected with the liquid crystal by using ultrasonic waves and cleaning fluid, and binding a driving chip by using an anisotropic conductive adhesive tape;
(B) sequentially sticking the manufactured R-layer liquid crystal display box, G-layer liquid crystal display box and B-layer liquid crystal display box together through OC glue;
(C) and a black light absorption film is attached to the lower surface of the B-layer ultrathin glass liquid crystal display box.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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