WO1997036205A1 - Dispositif d'affichage couleur a cristaux liquides et sa fabrication - Google Patents

Dispositif d'affichage couleur a cristaux liquides et sa fabrication Download PDF

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Publication number
WO1997036205A1
WO1997036205A1 PCT/JP1996/000755 JP9600755W WO9736205A1 WO 1997036205 A1 WO1997036205 A1 WO 1997036205A1 JP 9600755 W JP9600755 W JP 9600755W WO 9736205 A1 WO9736205 A1 WO 9736205A1
Authority
WO
WIPO (PCT)
Prior art keywords
substrate
black matrix
liquid crystal
spacer
display device
Prior art date
Application number
PCT/JP1996/000755
Other languages
English (en)
Japanese (ja)
Inventor
Mariko Urushibara
Hirotaka Imayama
Ryooji Iwamura
Hitoshi Azuma
Masao Uehara
Shigeyuki Okada
Original Assignee
Hitachi, Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi, Ltd. filed Critical Hitachi, Ltd.
Priority to PCT/JP1996/000755 priority Critical patent/WO1997036205A1/fr
Publication of WO1997036205A1 publication Critical patent/WO1997036205A1/fr

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Classifications

    • 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
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
    • G02F1/13392—Gaskets; Spacers; Sealing of cells spacers dispersed on the cell substrate, e.g. spherical particles, microfibres
    • 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

Definitions

  • the present invention relates to a color liquid crystal display device in which a cell gap is formed using a spacer material and a method for manufacturing the same.
  • a color liquid crystal panel used in a conventional color liquid crystal display device is arranged at a fixed interval through a spherical or cylindrical spacer made of silica, alumina, plastic, etc. between a pair of transparent electrodes facing each other.
  • a cell gap was maintained and liquid crystal was sealed in the gap.
  • This spacer material is sprayed on the electrode substrate. If the spray density is not uniform within the panel surface, cell gap unevenness is caused, and accordingly, color unevenness and contrast of the liquid crystal panel are caused. A phenomenon such as a drop in image quality and a decrease in image quality was observed.
  • a spraying method using a dry method and a wet method is used as a method of uniformly dispersing the spacer material on the substrate.
  • These spraying methods disperse the spacer material over the entire surface of the substrate by, for example, spraying nitrogen gas onto a nozzle attached to the container containing the spacer material or utilizing a pressure difference in the container.
  • the display pixel portion 2 red R, blue B, green G
  • the monitor material 7 adhered to the display pixel section 2
  • the display pixel portion 2 of the substrate also has a spacer.
  • Material 7 adhered, and the monitor material 7 adhered to the display pixel section 2 As a result, light is always transmitted regardless of the driving of the liquid crystal panel, and a height variation of several meters between the display pixel portion 2 of the substrate and the black matrix 4 is caused by Since the cell gap becomes non-uniform depending on where the spacer material 7 adheres, there is a problem that the color tone contrast of the color liquid crystal panel is reduced and the image quality is degraded.
  • the present invention solves such a problem, and prevents a deterioration in image quality such as light leakage and color tone unevenness caused by the spreader material 7 scattered in the display pixel portion 2, thereby achieving a high quality color image. It is an object to provide a liquid crystal display device and a method for manufacturing the same. Disclosure of the invention
  • the present invention provides a color liquid crystal display device in which a pair of glass substrates on which transparent electrodes having a predetermined pattern are formed are opposed to each other via a spacer material.
  • the cell gap is formed by distributing and placing spacer materials in the area corresponding to the black matrix formed in FIG.
  • FIG. 1 is a plan view of a panel used in a color liquid crystal display device of the present invention in which spacer materials are dispersed on a black matrix of a color filter substrate.
  • Fig. 2 is a schematic diagram of a spacer disperser.
  • Fig. 3 is a plan view (a) and a cross-sectional view (b) of a conventional color LCD panel.
  • FIG. 4 shows a sectional view (a) and a plan view (b) of a color filter substrate A used in the present invention.
  • FIG. 5 shows a cross-sectional view (a) and a plan view (b) of a color filter substrate B used in the present invention.
  • FIG. 6 shows a sectional view (a) and a plan view (b) of a color filter substrate C used in the present invention.
  • FIG. 7 shows a sectional view (a) and a plan view (b) of a color filter substrate D used in the present invention.
  • Fig. 8 shows a method of dispersing and distributing spacer materials by applying electric charges to the black matrix of a color filter substrate or a transparent electrode having the same pitch and pattern width as the black matrix.
  • FIG. 9 shows the dispersion of spacer material by applying charges to the black matrix of a color filter substrate or transparent electrodes having the same pitch and pattern width as the black matrix and the display pixel area.
  • Sectional drawing which shows the arrangement method.
  • FIG. 10 shows a sectional view (a) and a plan view (b) of a drive electrode substrate A used in the present invention.
  • FIG. 11 shows a sectional view (a) and a plan view (b) of a drive electrode substrate B used in the present invention.
  • FIG. 12 is a cross-sectional view showing a method of dispersing and disposing a spacer material by applying a charge to a transparent electrode having the same pitch and pattern width as the black matrix of the drive electrode substrate.
  • FIG. 13 shows a spacer formed by applying a charge to a transparent electrode having the same pitch and pattern width as the black matrix of the drive electrode substrate, and to other transparent electrode parts other than the above-mentioned electrode.
  • Sectional drawing which shows the dispersion
  • FIG. 14 is a sectional view (a) of dummy pattern substrates A, B, and C used in the present invention. (b), (c) and plan view (d) are shown.
  • FIG. 15 shows a method of disposing a spacer material using a dummy pattern substrate.
  • FIG. 16 is a schematic diagram showing the principle of a dispersing device for a spacer material by the jet method.
  • FIG. 17 is a cross-sectional view of a color filter substrate used for dispersing a spacer material by the jet method.
  • FIG. 18 is a main configuration diagram showing the principle of dispersion of the spacer material by the jet method.
  • FIG. 19 shows sectional views (a) and (b) and a plan view (c) of dummy pattern substrates D and E used for the wet dispersion method.
  • FIG. 20 is a principal configuration diagram showing the principle of a device for dispersing a spacer material on a dummy pattern substrate for a color filter by a dot method.
  • FIG. 21 is a cross-sectional view showing a dispersion arrangement method in which a spacer material is arranged on a black matrix of a color filter substrate using a dummy pattern substrate in the jet method dispersion method.
  • FIG. 22 shows a sectional view (a) and a plan view (b) of the dispersion film.
  • FIG. 23 is a process chart showing a method for dispersing and disposing a spacer material using a dispersion filter.
  • FIG. 24 shows a sectional view (a) and a plan view (b) of a main part of the dispersion filter with electrodes.
  • FIG. 25 is a process chart showing a method of dispersing and disposing a spacer material using a dispersion filter with electrodes.
  • FIG. 26 is a main part configuration diagram showing a method of dispersing a spacer material using a fine nozzle.
  • FIG. 27 is a main part configuration diagram showing a method of dispersing a spacer material using a plurality of fine nozzles.
  • FIG. 1 shows the configuration of a liquid crystal panel according to one embodiment of the present invention.
  • FIG. 1 (a) is a plan view of a color liquid crystal panel
  • FIG. 1 (b) is a cross-sectional view taken along line AA ′ of FIG. 1 (a).
  • the color liquid crystal panel joins two opposing substrates 1 and 101 (a color filter substrate and a drive electrode substrate) via a spacer material, in this example, a spacer bead 7 as an example. It is produced by pouring the liquid crystal 6 into the gap.
  • the lower one, the color filter substrate 1 has a display pixel area (red R, blue B, ⁇ G) and a black matrix 4, which is a light shielding layer between them.
  • a drive electrode 8 made of a thin film transistor is formed on a glass substrate on a drive electrode substrate 101 as an upper substrate, and an alignment film 5 is formed on the surface thereof.
  • the spacer bead 7 is provided at a predetermined interval on at least one of the color filter substrate 1 and the drive electrode substrate 101. In this case, the beads 7 for the spacers are dispersed and arranged on the black matrix 4 formed on the color filter substrate to form a cell gap. .
  • the upper and lower substrates 1 and 101 are joined via a spacer bead 7 disposed only on the black matrix 4 to achieve a cell gap height accuracy of ⁇
  • a high-precision cell gap of 0.05 m or less is formed, and as shown in the conventional example of FIG. 3, light leakage and uneven color tone caused by spacer material 7 scattered in the display pixel unit 2 Image quality is prevented from deteriorating.
  • a high-quality color liquid crystal display device can be realized.
  • the spacer beads 7 are applied to the black filter formed on the color filter substrate 1.
  • An embodiment in which the matrix is dispersedly arranged on the matrix 4 or on a predetermined position of the drive electrode substrate 101 will be described in detail below.
  • the black matrix formed on the color filter substrate is charged with a charge having a different polarity from that of the spacer beads.
  • a method for dispersing spacer beads only on a liquid will be described.
  • FIG. 2 is a schematic diagram of a bead dispersing device for a spacer used in this embodiment.
  • the bead dispersing device for spacers consists of 15 beads stirring vessel for spacer, 16 nozzles for ejecting beads for spacer, 17 nozzles for ejecting compressed gas, 19 beads dispersing chamber for spacer, and cover. 2 0.
  • Reference numeral 18 denotes a compressed gas supply device.
  • spacer beads 7 having a particle size of 6 to 9 m are monodispersed in a dry state.
  • the container 15 is provided with a bead spray nozzle 16 for a sensor.
  • a compressed gas ejection nozzle 17 for supplying / injecting the compressed gas from the compressed gas supply device 18 is arranged, for example, concentrically.
  • a negative pressure is generated in the spacer bead injection nozzle 16, and using this force, the bead dispersing chamber 1 separated by the cover 20 using the force.
  • the bead 7 for a spacer is sprayed on the board 21 inserted in the board 9. At this time, the spacer beads 7 are electrically charged, and the dispersed spacer beads 7 fall naturally by their own weight and are dispersed and arranged on the substrate 21. 22 is a chuck for the substrate 21.
  • the beads 7 for the spacer were dispersed.
  • spherical beads having a particle size of 6 to 9 m made of a plastic material are used as spacer materials.
  • spherical beads having a particle diameter of 6 to 9 ⁇ m, such as a cylindrical force or alumina can be used.
  • the beads for splicer 7 fall naturally, the beads for sprinkler whose abrasive grain size has increased due to agglomeration, etc., will naturally drop in the initial stage after ejection due to the increase in their own weight. For this reason, it is desirable that the substrate 21 should be carried into the apparatus after a while after the spacer beads are ejected.
  • the above-described embodiment uses a Coulomb force to disperse and disperse the beads for the Hess base on the black matrix formed on the color filter substrate.
  • the structure of the color filter substrate A will be described with reference to FIG.
  • the black matrix 4 of the color filter substrate 1 is made of a conductive material such as carbon or molybdenum as a component thereof, and is wired so that a uniform arbitrary voltage can be directly applied only to the black matrix 4. Substrate.
  • FIG. 8 shows the principle of dispersal arrangement of beads for a spacer using Coulomb force using the color filter substrate A described above.
  • the wiring is connected to the black matrix 4 so that A charge having a polarity different from that of the beads 7 is applied (tens to hundreds of V).
  • an attractive force is generated between the spacer beads 7 and the black matrix 4 by the Coulomb force, and the spacer beads are guided only on the black matrix 4 by this attractive force and distributed. Can be placed.
  • the above dispersion method can also be realized by using a color filter substrate B or C or D.
  • Fig. 5 shows the structure of the color filter substrate B.
  • the color filter substrate B is a substrate having electrodes 10 buried along the black matrix 4 and having a wiring structure so that a voltage can be arbitrarily applied.
  • This is, for example, A pitch and pattern width mask similar to the pattern of black matrix 4 is formed on glass substrate 1 by trilithography technology, and is transparent on black matrix 4 by sputtering technology and printing technology. It can be manufactured by forming the electrode 10 and then forming the alignment film 5.
  • the transparent electrodes 10 formed on the black matrix 4 are arranged so that a uniform voltage can be arbitrarily applied.
  • Fig. 6 shows the structure of the empty filter substrate C.
  • the color filter substrate C has a wiring structure that allows a uniform arbitrary voltage to be directly applied to the black matrix 4, and the uniform voltage is applied to the display pixel section 2 independently of the black matrix 4.
  • reference numeral 9 denotes a power supply
  • 80 denotes a wiring
  • Fig. 7 shows the structure of the color filter substrate D.
  • the color filter substrate D has a wiring structure in which the electrodes 11 are embedded along the black matrix 4 so that a voltage can be arbitrarily applied, and is independent of the black matrix 4.
  • the wiring structure is such that a uniform voltage can be arbitrarily applied to the display pixel portion 2.
  • the electrodes 10 and 11 embedded on the black matrix 4 or the black matrix 4 are provided with spacer beads 7.
  • spacer beads 7 As shown in FIG. 9, by applying a voltage so as to have a different polarity charge and applying a voltage to the display pixel portion 2 so as to have the same polarity charge as the spacer beads 7.
  • the attractive force acts on the spacer beads 7 on the black matrix 4 and the repulsive force acts on the spacer beads 7 on the display pixel section 2, the spacers are more efficiently placed on the black matrix 4 of the color filter substrate 1. It is possible to disperse the beads 7 for use.
  • Example 2 the electric charge of the spacer beads was used to drive By applying a spacer bead and a different polarity charge to the black matrix formed on the electrode substrate 101, the spacer bead is distributed only on a predetermined position of the substrate 101. A method of dispersing spacer beads to be arranged will be described.
  • FIG. 10 shows the structure of the drive electrode substrate A used in this embodiment.
  • the drive electrode substrate A has a drive electrode 8 on which a transparent electrode 12 having the same pitch and pattern width as the black matrix 4 described above is formed. Are wired so that a uniform voltage can be arbitrarily applied. Further, when the drive electrode substrate 101 and the color filter substrate are joined via the spacer bead 7, the relative positional relationship such that the transparent electrode 12 and the black matrix 4 overlap. This is because, for example, the same pitch and pattern width mask as the pattern of the black matrix 4 is formed on the glass substrate 1 by the photolithography technology, and the sputtering technology and the printing technology are used. It can be manufactured by forming a transparent electrode on the driving electrode and then forming an alignment film.
  • FIG. 12 shows the principle of the dispersed arrangement of the beads for the spacer using the Coulomb force using the drive electrode substrate A.
  • the transparent electrode 1 having the same pitch and pattern width as the black matrix 4 is used.
  • a charge having a polarity different from that of the spacer bead 7 is applied to the wiring connected to 2 (several tens to several hundreds of V).
  • an attractive force is generated between the spacer beads 7 and the transparent electrode 12 by the Coulomb force, and the spacer beads can be guided and dispersed only on the transparent electrode 12 by the attractive force. .
  • FIG. 11 shows the structure of the drive electrode substrate B.
  • the drive electrode substrate B has the same pitch and pattern width as the black matrix 4 on the drive electrode.
  • the transparent electrodes 13 are formed on the drive electrodes corresponding to the display pixels excluding the transparent electrodes 12, and these transparent electrodes 12, 13 are formed. Are wired so that a uniform voltage can be applied independently. Further, when the drive electrode substrate and the color filter substrate are joined via the spacer beads ⁇ ⁇ , the transparent electrode 12 and the black matrix 4 have a relative positional relationship such that they overlap each other.
  • a mask having the same pitch and pattern width as the pattern of the black matrix 4 is formed on a glass substrate by photolithography technology, and the transparent electrode 12 having the same pattern is formed by sputtering technology or the like. It is formed on the drive electrode by printing technology.
  • a transparent electrode 13 corresponding to a display pixel is formed on a portion other than the formed transparent electrode 12, and thereafter, an alignment film is formed.
  • a dummy pattern substrate having electrodes having the same pitch and butter width as the black matrix of the color filter substrate was used by utilizing the charge of the spacer beads, By applying an electric charge of a different polarity to that of the spacer beads, the spacer beads are separated on the pattern.
  • a method of dispersing beads for spacers in which spacer beads are transferred onto black matrix formed on a color filter substrate by using electrostatic force after being scattered is described. .
  • FIG. 14 shows the structure of the dummy pattern substrate A used in the present invention.
  • the substrate A has a groove with a depth of 3 to 1 Om having the same pitch and pattern width as the above-mentioned black matrix 4 on the surface of the substrate A, and a uniform groove on the base of the groove.
  • the transparent electrode 24 is formed so that a voltage can be arbitrarily applied. Also, it is not particularly specified as a substrate material.
  • a pattern mask having the same pitch and pattern width as the black matrix 4 of the color filter substrate is formed on the substrate by photolithography, for example, and dry or wet etching is performed.
  • the groove can be formed in the required pattern shape by using this method, and the electrode can be buried by spattering.
  • FIG. 15 shows a process of a method for dispersing beads for a spacer using the dummy pattern substrate A described above.
  • the beads for spacers are dispersed in the dummy pattern substrate.
  • a dispersion method a method similar to the principle shown in FIG. 8 of the first embodiment is used. That is, as shown in FIG. 15 (b), the electrodes 24 formed on the dummy pattern substrate A23 are made to have the same pattern as the pattern of the black matrix 4 of the color filter substrate 1 in a single pattern.
  • the attractive force due to the Coulomb force generated between the bead 7 for spacer and the electrode 24 By applying a voltage of several tens to several hundreds V so as to have a different polarity from the electric charge of the bead 7, the attractive force due to the Coulomb force generated between the bead 7 for spacer and the electrode 24.
  • the beads 7 for spacers are dispersed and arranged only on the pattern of the black matrix 4 by using.
  • the dummy pattern board B or C shown in FIGS. 14 (b) and (c) is used as the dummy pattern board shown in FIGS. 15 (a) and (c). Is also possible.
  • the electrode pattern substrate B shown in FIG. 14 (b) has electrodes 24 formed in a convex state at the same pitch and pattern width as the black matrix 4 of the color filter substrate. This is a substrate that has a wiring structure that can apply arbitrarily.This is a photomask that forms a pattern mask similar to the black matrix 4 pattern of the color filter substrate, and Alternatively, it can be produced by forming electrodes by a printing technique.
  • the structure of the dummy pattern substrate C is shown in Fig. 14 (c).
  • the electrodes 24 having the same pitch and pattern width as the black matrix 4 of the color fill substrate are embedded in the substrate 23 so that a voltage can be arbitrarily applied.
  • This is a substrate having a wiring structure.
  • a groove similar to the pattern of the black matrix 4 is formed on a glass substrate by a photolithography technique, and an electrode is formed in a concave portion by a sputtering technique or a printing technique.
  • the electrode 24 is wired so that a uniform voltage can be arbitrarily applied.
  • the same material as that of the substrate is sputtered or printed on the electrode 24 to form the electrode 24 embedded in the substrate 23. Can be formed.
  • FIG. 15 after the spacer beads 7 are dispersed and arranged on the dummy pattern substrate A, while maintaining the voltage applied to the electrodes 24 formed on the dummy pattern substrate 23, FIG. Invert as shown in (c), and align with the black matrix 4 of the substrates A to D shown in FIGS. 4 to 7 of the first embodiment.
  • the voltage applied to the electrodes 24 of the dummy pattern substrate 23 is made the same polarity as that of the spacer beads 7 to cause repulsion, and the black matrix of the color filter substrate 1 is actuated.
  • the spacer beads 7 By making the voltage applied to the box 4 different from that of the spacer beads 7, the spacer beads 7 generate a repulsive force from the dummy pattern board 23 by Coulomb force, and a Move to black matrix 4 and distribute to receive attraction.
  • the transparent electrodes 10 and 11 having a pattern having the same pitch and pattern width as or on the black matrix 4 are used.
  • more efficient blackening is achieved. It is also possible to disperse the beads 7 for the spacer only on the matrix 4.
  • a dummy pattern substrate having electrodes having the same pitch and pattern width as the black matrix of the color-fill substrate using the charge of the spacer beads was used.
  • the spacer beads are dispersed and arranged on the pattern by applying a spacer bead and a different polarity charge to this electrode, and then the electrostatic bead is used to place a bead on the drive electrode substrate at a predetermined position.
  • a method for dispersing a bead for use in transferring a bead for the use of a sensor will be described.
  • the spacer beads shown in FIG. 2 of the first embodiment are used.
  • the dispersing device disperses the beads 7 for the dummy pattern substrate.
  • a dispersing method a method similar to the principle shown in FIGS. 4 to 7 of the first embodiment is used.
  • the electrodes 24 formed on the dummy pattern substrate A have the same polarity as the black matrix pattern of the color filter substrate so that the electrodes 24 have a polarity different from that of the electric charge of the spacer beads 7.
  • a voltage of 100 V the spacer beads 7 are dispersed only on the black matrix pattern 4 using the attractive force of the Coulomb force generated between the spacer beads 7 and the spacer beads 7. Let it.
  • the spacer beads 7 are dispersed in the dummy pattern substrate by using the dummy pattern substrate B or C shown in FIG. 14 of the third embodiment. Is also possible.
  • the spacer beads 7 were dispersed and arranged on the dummy pattern substrate A, the spacer beads were inverted while maintaining the voltage applied to the electrodes formed on the dummy pattern substrate.
  • Pattern matching is performed with a transparent electrode 12 having a pattern of the same pitch and pattern width as the black matrix 4 formed on the drive electrode substrate A or B shown in FIGS. After the pattern positions of both are set, the voltage applied to the electrodes 24 of the dummy pattern substrate 23 is set to the same polarity as the beads 7 for the spacers, and the black matrix 7 of the drive electrode substrate 101 is set to the same polarity.
  • the spacer beads 7 are separated from the dummy pattern substrate by Coulomb force. Receives a repulsive force and an attractive force from the drive electrode substrate 101, moves and disperses them on the transparent electrodes 12 having a pattern having the same pitch and pattern width as the black matrix 4.
  • the driving electrode substrate B in addition to applying the charge of the opposite polarity to the spacer beads 7 to the transparent electrode 12 having the same pitch and pattern width as the black matrix 4, in addition to applying a charge of the same polarity as that of the spacer beads 7 to the transparent electrode 13 other than the transparent electrode 12 having a pattern of the same pitch and pattern width as the black matrix 4, It is possible to efficiently disperse the spacer beads 7 only on the pattern having the same pitch and pattern width as the black matrix.
  • Fig. 16 shows the principle of the bead dispersing device for spacers using the jet method.
  • the apparatus is composed of a substrate transfer section including a chuck 27 and an arm 28, and a solution tank 26 for a bead dispersion solution 25 for a spacer.
  • the substrate 21 is fixed to a chuck 27 whose entrance angle and discharge angle with respect to the liquid surface of the solution tank can be adjusted arbitrarily.
  • This chuck 27 is an arm 2 whose vertical speed can be adjusted. Attached to 8.
  • the substrate 21 can be taken out of the spacer bead dispersion solution 25 at an arbitrary angle and at an arbitrary speed.
  • the bead dispersion solution 25 is prepared by converting a bead made of silica, alumina, polyethylene, etc. with a particle size of several meters into pure water or 30% isopropanol mixed pure water. Dispersion and stirring are used, and the mixing amount of beads for spacer is 10 to 30 w%. The spacer beads 7 are completely monodispersed in the solution.
  • FIG. 17 shows a cross section of the color filter substrate 1 used in this dispersion method.
  • the color matrix substrate 1 has a black matrix pattern portion having a depth of about 2 m and a width of about 10 m due to manufacturing processes such as film formation.
  • Fig. 18 shows the principle of the method of dispersing beads for spacers by the jet method.
  • the color filter substrate 1 is fixed to the chuck 27, and is completely immersed in the spacer bead dispersion solution 2 ⁇ by the movement of the arm 28. Thereafter, the chuck 27 is tilted in the solution 25 so as to be at an angle of 10 to 45 degrees with respect to the solution surface, and a constant angle of 5 to 100 mm Zs is maintained by the arm 28 while maintaining a constant angle. Increase diagonally at speed.
  • the cross-section of substrate 1 is the pattern of black matrix 4 due to the manufacturing process such as film formation.
  • the concave portion has a depth of about 2 m and a width of about 1 Q ⁇ m, and as the chuck 27 rises, the spacer beads 7 are dispersed and arranged along the concave shape. .
  • the dispersion arrangement ratio of the spacer beads 7 depends on the viscosity of the solution 25, the angle of the chuck 27, the rising speed, and the like. By controlling this value arbitrarily, the spacer beads can be adjusted. 7 can be controlled.
  • the adhesion of the spacer beads 7 to the back surface of the substrate 1 can be completely removed by, for example, an air knife that blows high-pressure air to the back surface, although not shown.
  • the method of dispersing the spacer beads by the slit method is a method in which the spacer beads 7 are dispersed and adhered to the concave portions by using the groove shape formed on the surface of the substrate 1. Therefore, by using the color filter substrate A or B or C or D shown in FIG. 4 to FIG. It is also possible to disperse the beads 7 only on the black matrix 4.
  • a dummy pattern substrate having a groove shape similar to that of the black matrix of the color filter substrate is immersed in a solution 25 in which spacer beads 7 are dispersed, and is slid upward.
  • the spacer beads 7 are dispersed and arranged on the dummy pattern, and then the black matrix 4 formed on the color filter or the drive
  • a method of dispersing the spacer beads 7 for transferring the spacer beads 7 onto a predetermined position on the substrate will be described.
  • the dummy pattern substrate D used in this embodiment is shown in FIG.
  • the groove has a concave shape with a depth of l to 6 m and a width of about 8 to 10 ⁇ m.
  • An electrode 24 to which pressure can be applied is formed. This is a black matrix by photolithography.
  • a pattern mask reverse to that of the evening is formed, a groove is formed in a required pattern shape by dry or wet etching, and then an electrode 24 is formed at the bottom of the groove by sputtering. At this time, the electrode may be embedded in the groove bottom.
  • Various materials such as glass and ceramics can be used as the substrate material.
  • the beads dispersed solution for spacer 25 contains beads for sensors made of silica, alumina, polypropylene, etc. with a particle size of several meters, pure water or 30% isopropanol. The mixture is mixed and stirred in pure water, and the mixing amount of the beads 7 for the spacer is 10 to 30 w%. The spacer beads 7 are completely monodispersed in the solution 25.
  • Fig. 20 shows the principle of the method of dispersing beads for spacers by the nip unit method.
  • the dummy pattern substrate 23 is fixed to the chuck 27, and is completely immersed in the bead dispersion solution 25 for spacer by the movement of the arm 28.
  • chuck 27 is tilted in the solution so that it is at 10 to 45 degrees with respect to the surface of solution 25, and rises obliquely at a constant speed of 5 to 10 Omm / s while maintaining the angle.
  • the pattern portion similar to the black matrix 4 is in a recessed state with a depth of about 2 m and a width of about 10 m. Accordingly, spacer beads 7 are dispersedly arranged along the concave shape.
  • a voltage different from that of the spacer beads 7 is applied to the electrode 24 of the dummy substrate D 23 so that the dispersed beads 7 for the spacer do not move.
  • the spacer beads 7 are adsorbed to the dummy pattern substrate 23 using the Coulomb force. Invert while maintaining this applied voltage, and match the pattern with the black matrix 4 of the color filter substrate A or B or C or D1. After the pattern positions of both are set, the voltage applied to the electrodes 24 of the dummy pattern substrate 23 is set to the same polarity as that of the spacer beads 7, and the black matrix 4 of the color filter substrate 1 is set.
  • the bead 7 has a different polarity from the voltage applied to the spacer beads 7 so that the spacer beads 7 generate a repulsive force from the dummy pattern substrate 23 due to the Coulomb force, and Since the substrate 1 receives an attractive force, it can be moved on the black matrix 4 and distributed.
  • the electrodes 10 and 11 embedded under the black matrix 4 or the black matrix 4 are different from the spacer beads 7.
  • the display pixel portion 2 so as to have the same polar charge as the spacer beads 7 as shown in FIG. Since the attractive force acts on the black matrix 4 and the repulsive force acts on the spacer beads 7 in the display pixel section 2, the black matrix 4 on the color filter substrate 1 is more efficiently placed on the black matrix 4. It is only possible to disperse the spacer beads 7.
  • the dummy pattern substrate D23 has a wiring structure in which a pattern electrode 24 similar to the black matrix is embedded inside the substrate 23, and a groove is formed on the dummy pattern substrate D23 so that a uniform voltage can be arbitrarily applied.
  • a turn mask is formed, electrodes are formed by a snow, a laser, or a printing technique, and a substrate layer is formed on the entire surface by sputtering and a printing technique. Then, a pattern mask opposite to the black matrix pattern is formed by photolithography, and grooves are formed in the required pattern shape by dry or wet etching. It is manufactured by forming a pattern mask similar to the liquid pattern, and forming a convex shape on the surface by sputtering and printing technology.
  • the black matrix 4 or the electrodes 10 buried under the black matrix 4 are used.
  • a voltage is applied to 11 so that it has a charge of a different polarity from the spacer beads 7, and a voltage is applied to the display pixel section 2 so that it has a charge of the same polarity as the spacer beads 7.
  • an attractive force acts on the black matrix 4 and a repulsive force acts on the beads 7 for the display in the display pixel portion 2, thereby improving the efficiency. It is possible to disperse the spacer beads 7 only on the black matrix 4.
  • the spacer beads 7 can be dispersed by using a drive electrode substrate. After dispersing the spacer beads 7 on the dummy pattern substrate D or E, the beads are inverted while maintaining the voltage applied to the electrodes 24 formed on the dummy pattern substrate 23, and the first of the first embodiment. Pattern alignment with the transparent electrode 12 having the same pitch and pattern width as the black matrix 4 formed on the drive electrode substrate 101 shown in FIG. 2 is performed. After the pattern positions of both are set, the voltage applied to the electrode 24 of the dummy pattern substrate 23 is set to the same polarity as that of the beads 7 for the spacer, and the same pitch and pitch as those of the black matrix 4 of the drive electrode substrate 101 are used.
  • the drive electrode substrate B in addition to applying a charge of a different polarity to the spacer beads 7 to the transparent electrode 12 having the same pitch and pattern width as the black matrix 4, in addition to applying a charge of the same polarity as the spacer beads 7 to the transparent electrode 13 other than the transparent electrode 13 having a pattern with the same pitch and pattern width as the black matrix, more efficient It is possible to disperse spacer beads on the electrode 12 having the same pitch and pattern width as the black matrix 4.
  • a dispersion filter having holes in a pattern similar to the black matrix of the color filter substrate is placed on the color filter substrate or the drive electrode substrate, and spacer beads are placed in the filter holes.
  • Fig. 22 shows the dispersion filter.
  • the dispersion filter 30 is a flat substrate that is larger than the color filter substrate and the drive electrode substrate to be used, and has the same pitch and pattern width as the black matrix 4 and the spacer beads 7 to be used.
  • a hole 31 having a diameter about 0.5 to 4 m larger than the diameter is provided.
  • the shape of the hole 31 may be a shape other than a circle, such as a polygon such as a square or a hexagon, or an ellipse, into which one spacer bead can be inserted.
  • the substrate material of the filter 30 is made of various materials such as glass and ceramics, and the thickness of the substrate depends on the spacer used.
  • the diameter should be equal to or more than 1.5 times the diameter of beads 7 for use.
  • FIG. 23 shows a conceptual diagram of a method of dispersing and disposing the spacer beads 7 using the dispersing filter 30.
  • the dispersing filter 30 is set on the empty filter substrate or the driving electrode substrate and then inserted into the device.
  • the spacer beads 7 sprayed from the spacer bead ejection nozzles 16 are sprayed on the filter 30 or in the holes 31.
  • a flat plate having a linear shape on one side, such as a scrubber 32, is used on the filter 30.
  • the filter 30 is removed, so that the black matrix 4 formed on the empty filter substrate or the drive electrode substrate 1 is removed. 01 Disperse and arrange spacer beads 7 on 1.
  • a color filter substrate A or B or C or D shown in FIGS. 4 to 7 of the first embodiment may be used as the color filter substrate 1.
  • the electrodes 10 and 11 having the same pitch and pattern width as the black matrix 4 or the black matrix of the color finoleta substrate 1 are made to have a different polarity from the electric charge of the beads 7 for the spacer.
  • the spacer beads 7 are adsorbed on the color filter substrate 1, and the spacer beads 7 can be more efficiently dispersed only on the black matrix 4.
  • spacer beads are provided on the transparent electrodes 10 and 11 having a pattern of the same pitch and pattern width on the black matrix 4 or the black matrix.
  • a charge having the same polarity as that of the spacer beads 7 is applied to the display pixel portion 2 to the black matrix 4. It is possible to disperse the spacer beads 7 only in the case.
  • the same pitch and pattern width as the black matrix 4 of the drive electrode substrate 101 are used.
  • a transparent electrode 1 having a pattern with the same pitch and pattern width as that of the matrix 4 is adsorbed to the transparent electrode i 2 having a pattern with the same pitch and pattern width as the matrix 4, and more efficiently having a pattern with the same pitch and pattern width as the black matrix 4. It is possible to disperse the beads 7 for the spacer only on 2.
  • the driving electrode substrate B in addition to applying a charge having a different polarity from the spacer beads 7 to a transparent electrode having a pattern having the same pitch and pattern width as the black matrix 4, By applying a charge of the same polarity as that of the spacer beads 7 to a transparent electrode other than a transparent electrode having a pattern of the same pitch and pattern width as the black matrix 4, it is possible to further improve the efficiency. It is possible to disperse the spacer beads 7 only on the same pitch and pattern width as the black matrix 4.
  • a filter with a dispersion electrode having holes in a pattern similar to the black matrix of the color filter substrate is placed on the color filter substrate or the drive electrode substrate, and the filter holes are formed using electrostatic force.
  • the spacer beads are guided one by one into the section, and the spacer beads are dispersed and arranged at a predetermined position on the black matrix formed on the color filter substrate or on the drive electrode substrate. The method of dispersing the spacer beads will be described.
  • Fig. 24 shows a filter with dispersion electrodes.
  • the dispersion film with electrodes 3 3 is a flat substrate larger than the color filter substrate 1 to be used, and the spacer beads 7 to be used along the same pitch and pattern width as the black matrix 4. 0.5 to 4 m from the diameter of A hole 35 having a larger diameter is provided.
  • the shape of the holes 35 is not limited to a circle, but may be any shape such as a polygon such as a square or a hexagon, or an oval such that one spacer bead can be inserted.
  • the filter 33 has electrodes 36 and 37 formed on the filter surface and the pore wall, and particularly has an electrode 3 having the same size as the bead diameter for the spacer used on the pore wall. 7 are formed along the hole wall.
  • the substrate is made of various materials such as glass and ceramics, and the thickness of the substrate is at least twice the diameter of the spacer beads 7 used.
  • Fig. 25 shows a conceptual diagram of the bead dispersing method for spacers using a dispersing film with electrodes.
  • the dispersing filter 33 is placed on the empty filter substrate 1 or the driving electrode substrate 101 and then inserted into the device.
  • the substrate with electrodes 33 has the surface electrode 34 in the same polarity as the electric charge of the spacer beads 7, and the pore wall electrodes 36, 37 in the order from the closest to the surface electrode 34. It is applied so that the charge of the service bead 7 and the different polarity, the same polarity, the different polarity...
  • the spacer beads 7 sprayed from the spacer bead ejection nozzles 16 move to the holes because a repulsive force is generated on the filter surface and a bow (force) is generated in the holes 35.
  • the hole 35 has one spacer bead 7.
  • the electric charges are inverted and one space existing in the hole portion 35 is formed.
  • the beads 7 for the spacer are moved to the color filter side by the size of the pore electrodes 36 and 37.
  • the charge reversal of the pore electrodes 36 and 37 is repeated so that the beads 7 for the spacer are obtained.
  • a color filter substrate A or B or C or D shown in FIGS. 4 to 7 of the first embodiment may be used as the color filter substrate.
  • the black matrix 4 of the empty filter substrate or an electrode having the same pitch and pattern width as the black matrix 4 is made to have a different polarity from the electric charge of the spacer beads 7 so that The spacer beads are adsorbed on the color filter substrate 1, and the spacer beads 7 can be more efficiently dispersed on the black matrix 4.
  • spacer beads 7 are provided on the transparent electrodes 10 and 11 having the same pitch and pattern width as the black matrix 4 or the same as the black matrix 4.
  • the driving electrode substrate As the driving electrode substrate, the driving electrode substrate A or B shown in FIG. 10 or FIG. 11 of Embodiment 2 may be used.
  • the transparent electrode 12 having the same pitch and pattern width as the black matrix 4 of the drive electrode substrate 101 is made to have a different polarity from the electric charge of the spacer beads 7 so as to form a spacer for the spacer.
  • the beads ⁇ adhere to the transparent electrode 12 having the same pitch and pattern width as the black matrix 4 on the drive electrode substrate 101, and the same pitch as the black matrix 4 more efficiently. Further, it is possible to disperse the spacer beads 7 only on the transparent electrode 12 having the pattern width.
  • liquefied glass is spouted from a fine nozzle having a fine opening with a diameter of several meters, so that the liquid glass is spread over a black matrix formed on the color filter substrate and a predetermined position on the drive electrode substrate.
  • the method of dispersing the beads for the spacer in which the beads for the distributor are dispersed will be described.
  • Figure 26 shows the method of dispersing and distributing beads for a spacer using the fine nozzle method.
  • the device consists of a solution tank (not shown), a fine nozzle 42 for ejecting the solution, and a pump (not shown) for replenishing the solution to the fine nozzle 42. Then, a color filter substrate or a drive electrode substrate is provided.
  • the liquid tank is filled with liquefied glass, and liquefied glass is ejected from a fine nozzle 42 having a fine piston mechanism by an ink jet method.
  • the diameter of the fine nozzle 42 used in this embodiment is very small, that is, a few meters, and the liquefied glass that has been ejected is separated from the fine nozzle 42 by a spherical shape in the atmosphere.
  • the glass beads adhere to the color filter substrate and are used as spacer beads 43 having a required height.
  • the black matrix is obtained. It is possible to disperse the spacer beads 43 on the box 41.
  • spacer beads 43 can be dispersedly arranged on the drive electrode substrate 40 along the same pitch and pattern width as the black matrix 41.
  • the number of the fine nozzles 40 is not limited to one, and a plurality of fine nozzles 40 may be provided at intervals of the black matrix 41 of the empty filter substrate 40 as shown in FIG. 27. By installing a plurality of nozzles 42, the work efficiency can be improved.
  • the entrance ratio of the black material to the projection area of the black matrix of the liquid crystal panel is 70 to 100%.
  • the adhesion of beads to the display pixel area can be suppressed to 30% or less, which significantly improves image quality such as light leakage and uneven color tone.
  • the color filter substrate A or B or C or D shown in FIGS. 4 to 7 of Example 1 or the drive electrode substrate A or B shown in FIGS. 10 and 11 of Example 2 is used.
  • the black matrix is used to place spacer beads on the black matrix using the attractive force of Coulomb force. By maintaining the electric charge, the movement of the spacer beads during the movement of the substrate can be prevented.
  • the color liquid crystal display device includes a personal computer, a television, a clock, a car navigation system, a computer game, a videophone, a measuring device, an inspection device, a processing device, an image processing device, a medical device, a monitor system, and a communication device.
  • a high-quality display device without light leakage or uneven color tone can be provided as a display unit for various electronic devices such as conference systems.
  • since there is no sputter material in the display pixel unit In addition to eliminating light leakage caused by the spacer material, it is possible to obtain high-precision and high-quality color liquid crystal panels and color liquid crystal display devices with a cell gap height accuracy of 0.05 m or less at the same time. It is extremely effective.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

L'invention porte sur un dispositif d'affichage couleur à cristaux liquides à même d'afficher des images de grande qualité tout en évitant que cette qualité ne s'amenuise du fait d'une perte de luminosité et d'une disparité des tonalités chromatiques occasionnées par la présence d'intercalaires épars dans une partie d'un élément d'affichage. De par sa conception, le dispositif est capable de supprimer de tels désagréments, à savoir un affaiblissement de la qualité de l'image dû à la détérioration, par la présence d'éléments intercalaires, des tonalités chromatiques et du contraste, et ce, sur la totalité de la surface d'un substrat. Dans la mesure où deux substrats en verre possédant des électrodes transparentes se font face et qu'ils sont pourvus, dans l'espace les séparant, de billes intercalaires, ces billes se répartissant dans une matrice noire formée sur un filtre à couleurs constituant le panneau d'affichage couleur à cristaux liquides, il n'existe pas d'intercalaire dans la partie susmentionnée de l'élément d'affichage. De la sorte, la perte de luminosité et autres désagréments, dus à la présence d'intercalaires, ne risquent pas de se produire. Il est donc possible de fabriquer un dispositif d'affichage couleur à cristaux liquides, d'une grande précision dans la hauteur des espaces intercellulaires, capable d'afficher des images de grande qualité.
PCT/JP1996/000755 1996-03-22 1996-03-22 Dispositif d'affichage couleur a cristaux liquides et sa fabrication WO1997036205A1 (fr)

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PCT/JP1996/000755 WO1997036205A1 (fr) 1996-03-22 1996-03-22 Dispositif d'affichage couleur a cristaux liquides et sa fabrication

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005321540A (ja) * 2004-05-07 2005-11-17 Sekisui Chem Co Ltd 液晶表示装置の製造方法
JP2008281740A (ja) * 2007-05-10 2008-11-20 Toppan Printing Co Ltd スペーサーの形成方法とそれに用いるブランケット基材
US7701545B2 (en) 2004-11-02 2010-04-20 Sharp Kabushiki Kaisha Substrate for liquid crystal display devices
US8174664B2 (en) 2004-10-14 2012-05-08 Sharp Kabushiki Kaisha Multilayer substrate

Citations (7)

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Publication number Priority date Publication date Assignee Title
JPS5792314A (en) * 1980-11-29 1982-06-08 Casio Comput Co Ltd Manufacture of display cell vessel
JPH03288828A (ja) * 1990-04-05 1991-12-19 Oki Electric Ind Co Ltd スペーサーの形成方法
JPH0446320A (ja) * 1990-06-13 1992-02-17 Matsushita Electric Ind Co Ltd 液晶パネルの製造方法
JPH04204417A (ja) * 1990-11-29 1992-07-24 Matsushita Electric Ind Co Ltd 液晶表示パネルの製造方法
JPH0561052A (ja) * 1991-08-30 1993-03-12 Stanley Electric Co Ltd 液晶表示素子の製造方法
JPH05333346A (ja) * 1992-06-02 1993-12-17 Sharp Corp 液晶表示装置およびその製造方法
JPH06250194A (ja) * 1993-02-25 1994-09-09 Toshiba Corp 液晶表示装置の製造方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5792314A (en) * 1980-11-29 1982-06-08 Casio Comput Co Ltd Manufacture of display cell vessel
JPH03288828A (ja) * 1990-04-05 1991-12-19 Oki Electric Ind Co Ltd スペーサーの形成方法
JPH0446320A (ja) * 1990-06-13 1992-02-17 Matsushita Electric Ind Co Ltd 液晶パネルの製造方法
JPH04204417A (ja) * 1990-11-29 1992-07-24 Matsushita Electric Ind Co Ltd 液晶表示パネルの製造方法
JPH0561052A (ja) * 1991-08-30 1993-03-12 Stanley Electric Co Ltd 液晶表示素子の製造方法
JPH05333346A (ja) * 1992-06-02 1993-12-17 Sharp Corp 液晶表示装置およびその製造方法
JPH06250194A (ja) * 1993-02-25 1994-09-09 Toshiba Corp 液晶表示装置の製造方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005321540A (ja) * 2004-05-07 2005-11-17 Sekisui Chem Co Ltd 液晶表示装置の製造方法
US8174664B2 (en) 2004-10-14 2012-05-08 Sharp Kabushiki Kaisha Multilayer substrate
US7701545B2 (en) 2004-11-02 2010-04-20 Sharp Kabushiki Kaisha Substrate for liquid crystal display devices
JP2008281740A (ja) * 2007-05-10 2008-11-20 Toppan Printing Co Ltd スペーサーの形成方法とそれに用いるブランケット基材

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