JP3567183B2 - Liquid crystal display - Google Patents

Liquid crystal display Download PDF

Info

Publication number
JP3567183B2
JP3567183B2 JP27279296A JP27279296A JP3567183B2 JP 3567183 B2 JP3567183 B2 JP 3567183B2 JP 27279296 A JP27279296 A JP 27279296A JP 27279296 A JP27279296 A JP 27279296A JP 3567183 B2 JP3567183 B2 JP 3567183B2
Authority
JP
Japan
Prior art keywords
liquid crystal
signal wiring
common electrode
electrode
video signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP27279296A
Other languages
Japanese (ja)
Other versions
JPH1062802A (en
Inventor
直人 広田
Original Assignee
大林精工株式会社
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
Family has litigation
Application filed by 大林精工株式会社 filed Critical 大林精工株式会社
Priority to JP27279296A priority Critical patent/JP3567183B2/en
Publication of JPH1062802A publication Critical patent/JPH1062802A/en
Application granted granted Critical
Publication of JP3567183B2 publication Critical patent/JP3567183B2/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=17518813&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JP3567183(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Anticipated expiration legal-status Critical
Application status is Expired - Fee Related legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1343Electrodes
    • G02F1/134309Electrodes characterised by their geometrical arrangement
    • G02F1/134363Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]

Description

[0001]
[Industrial applications]
The present invention relates to a large-screen active-matrix liquid crystal display device having a wide viewing angle and high image quality.
[0002]
[Prior art]
A method of applying an electric field to a liquid crystal composition layer using a pair of comb-shaped electrodes formed on one substrate of a conventional active matrix type liquid crystal display device is disclosed in, for example, JP-A-7-36058 and JP-A-7-159786. And JP-A-6-160878. Hereinafter, a display system in which the main electric field direction applied to the liquid crystal composition layer is substantially parallel to the substrate interface is referred to as a horizontal electric field system.
1 and 2 show examples of a conventional in-plane switching method. The liquid crystal drive electrode (4), which is a comb-shaped pixel electrode, and the common electrode (3) are linearly arranged in parallel, and the distance a between the electrodes (3) and (4) is the same. is there.
[0003]
[Problems to be solved by the invention]
As for the transmissivity characteristics with respect to the driving voltage of the liquid crystal cell of the in-plane switching method, when a voltage higher than a certain voltage is applied as shown in FIG. 3, the luminance decreases. If the video signal voltage is slightly too high, the gradation of the image will be inverted. In the gray scale display characteristics, this gray scale inversion is a very serious problem, resulting in an extremely unnatural image display.
[0004]
In a horizontal electric field type liquid crystal display device, the liquid crystal driving voltage tends to be higher than that in a conventional vertical electric field type TN liquid crystal display device, and a driver IC to be driven must have a high voltage output, resulting in an increase in cost. was there.
[0005]
Further, a combination of an alignment film and a liquid crystal used in a horizontal electric field type liquid crystal display device is required to have a pretilt angle of 1 degree or less, and an alignment film of about 4 to 7 degrees used in a conventional TN liquid crystal display device is used. I can not use it. For this reason, when a horizontal electric field type liquid crystal display device is manufactured on a conventional TN liquid crystal display device manufacturing line, it is necessary to change the material of the alignment film and the liquid crystal material, which causes a problem that the production efficiency is reduced.
[0006]
Further, the color filter substrate is easily affected by static electricity because there is no transparent conductive film on the entire surface unlike the conventional TN liquid crystal display device, and there is a problem that poor alignment occurs when charged up.
[0007]
The processing of the pixel electrode used in the liquid crystal display device of the in-plane switching method is often performed by wet etching, and the distance between the electrodes cannot be made very small. Therefore, the response speed of the liquid crystal is slower than that of the conventional TN liquid crystal, and it is difficult to handle moving images.
[0008]
The present invention has been made to solve these problems, and an object of the present invention is to provide a horizontal electric field liquid crystal display device with no grayscale inversion, good viewing angle characteristics, a low-voltage driving IC, and a high response speed. Is to provide.
Another object is to increase the degree of freedom in selecting usable liquid crystal compositions and alignment film materials, improve the yield of the liquid crystal process, and reduce costs.
[0009]
[Means for Solving the Problems]
In order to solve the above problems and achieve the above object, the present invention uses the following means.
A thin film transistor formed on a substrate at each intersection of the scanning signal wiring, the video signal wiring, the scanning signal wiring and the video signal wiring, a liquid crystal driving electrode connected to the thin film transistor, and at least a part of the liquid crystal driving electrode A liquid crystal display device comprising: an active matrix substrate having a common electrode formed to face an electrode; a counter substrate facing the active matrix substrate; and a liquid crystal layer sandwiched between the active matrix substrate and the counter substrate. ,
[Means 1] The inter-electrode distance between the liquid crystal drive electrode and the common electrode is not uniform in one pixel, but is a combination of two or more types of inter-electrode distance.
[0010]
[Means 2] In the means 1, there are two or more types of inter-electrode distances between the liquid crystal drive electrode and the common electrode within one pixel. They were arranged symmetrically.
[0011]
[Means 3] The common electrodes are connected in the direction in which the video signal wiring extends, and in the effective display screen, the common electrodes are not connected to each other across the video signal wiring.
[0012]
[Means 4] In the means 3, the common electrodes connected in the direction in which the video signal wiring extends are separated into an odd group and an even group, and the common electrodes are respectively connected to the odd group and the even group according to the period of the scanning signal. A liquid crystal display characterized by a driving method in which a voltage waveform having a reverse phase is applied and a video signal waveform having a phase opposite to that of the common electrode is applied to the liquid crystal drive electrodes facing the common electrodes of the odd and even groups. apparatus.
[0013]
[Means 5] In the lateral electric field type liquid crystal driving electrode, the liquid crystal driving electrode and the scanning signal wiring are more insulated than the additional capacitance formed by overlapping the liquid crystal driving electrode and the common electrode via the insulating film. The structure was such that the additional capacitance formed by being superposed through the film was larger.
[0014]
[Means 6] In the means 5, the potential of the common electrode is fixed, and the positive and negative video signal voltages with respect to the common electrode potential are alternately written on the liquid crystal drive electrode in accordance with the period of the scanning signal, and A liquid crystal display device using a capacitive coupling driving method in which a voltage signal waveform is also applied to a scanning signal wiring superimposed on a liquid crystal driving electrode via an insulating film so that a voltage applied to the liquid crystal composition layer is further increased. .
[0015]
[Means 7] In a horizontal electric field type liquid crystal display device, a thin film semiconductor layer is doped with an impurity, activated and reduced in resistance to form a liquid crystal drive electrode.
[0016]
[Means 8] In the means 7, the video signal wiring and the pixel electrode are arranged so as to be bent at an angle of ± 1 degree to ± 45 degrees with respect to the liquid crystal alignment direction.
[0017]
[Means 9] In the means 7, the scanning signal wiring and the pixel electrode are arranged so as to be bent at an angle of ± 1 degree to ± 45 degrees with respect to the liquid crystal alignment direction.
[0018]
[Means 10] In the means 7, the video signal wiring and the pixel electrode are arranged so as to be bent in a range of 45 degrees to 135 degrees except 90 degrees with respect to the liquid crystal alignment direction.
[0019]
[Means 11] In the means 7, the scanning signal wiring and the pixel electrode are arranged so as to be bent in a range of 45 ° to 135 ° except 90 ° with respect to the liquid crystal alignment direction.
[0020]
[Means 12] In an in-plane switching mode liquid crystal display device, a high-resistance material (10%) is formed on an overcoat layer covering a color filter layer formed on a counter substrate. 9 Ω · cm-10 11 Ω · cm).
[0021]
[Means 13] The liquid crystal display according to the means 12, wherein the sum of the thicknesses of the color filter layer, the overcoat layer and the liquid crystal layer is at least twice the distance between the liquid crystal drive electrode and the common electrode. apparatus.
[0022]
[Means 14] In an in-plane switching mode liquid crystal display device, an insulating film is used as an overcoat layer overlying a color filter layer formed on a counter substrate, and an overcoat insulating film is formed on the boundary between the R, G, and B color filters. A conductive or semiconductor electrode was formed as a black mask.
[0023]
[Means 15] In a manufacturing process of a liquid crystal display device of an in-plane switching mode, an alignment film for aligning liquid crystal is applied, and after baking, the alignment film is subjected to UV irradiation treatment or He, Ne, Ar, N 2 , O 2 After performing an ion implantation process or a plasma process, a rubbing process was performed to reduce the liquid crystal pretilt angle to 1 degree or less.
[0024]
[Means 16] In the means 3, the common electrodes connected in the direction in which the video signal wiring extends are separated into an odd group and an even group, and the video signal wiring is divided into two at the center of the screen.
[0025]
[Means 17] In the means 16, the scanning signal lines divided into two groups at the center of the screen are divided into an upper group and a lower group at the same time, and the upper and lower video signal wirings are divided into an odd group and an even group. By applying a negative-phase video signal voltage waveform to the odd and even groups of common electrodes, a voltage waveform of the video signal wiring and a common-electrode drive waveform of the opposite phase are applied to the upper and lower parts of the screen at the same time. A liquid crystal display device characterized by a driving method of writing different video signals on a horizontal line of a book.
[0026]
[Action]
In the case where the distance between the liquid crystal driving electrode and the common electrode is not uniform within one pixel as in the above-described means 1 and 2, it is constituted by a combination of two or more types of electrode distance. As shown in FIG. 3, even when the grayscale inversion occurs at the shortest inter-electrode distance, no grayscale inversion occurs at the widest inter-electrode distance. As shown in FIG. 5, FIG. 6, FIG. 8, and FIG. 10, when different electrode distances are arranged symmetrically or vertically symmetrically with respect to the center of the pixel, scanning signal wiring or image By increasing the distance between the electrodes closest to the signal wiring, it is possible to obtain a uniform image with less crosstalk.
[0027]
By means of the above means 3 and 4, it becomes possible to reduce the video signal driving voltage of the dot inversion driving method to half or less even in the liquid crystal display device of the horizontal electric field method. Since a video signal driving IC driven by 5 V can be used, the cost can be reduced. As shown in FIGS. 16 and 17, in the dot inversion drive, horizontal crosstalk and horizontal crosstalk hardly occur, so that good image quality can be obtained.
Further, as shown in FIG. 13, by completely covering the TFT portion with the connection portion of the common electrode, light can be prevented from entering the TFT, so that the black mask on the color filter side can be omitted, and the color filter can be omitted. Cost can be reduced. By eliminating the CF-side black mask, a liquid crystal panel having a high aperture ratio and a high luminance can be manufactured.
[0028]
The above means 5 and 6 make it possible to reduce the video signal driving voltage of the horizontal line inversion driving method to less than half even in the liquid crystal display device of the horizontal electric field method.
As shown in FIGS. 24, 27, and 29, a large capacitance is formed between the liquid crystal drive electrode and the scanning signal wiring via the insulating film, and the common electrode is used to control the potential of the liquid crystal drive electrode using this capacitance. It is not necessary to apply a special drive signal waveform to the signal. That is, the common electrode potential may be fixed at a potential close to the median value of the video signal voltage. In the conventional horizontal line inversion driving method, since the entire common electrode is driven with a voltage waveform having a phase opposite to that of the video signal waveform in accordance with the period of the scanning signal wiring, the resistance value of the common electrode must be reduced. There was no freedom. Since the entire common electrode has a large area overlapping with the video signal wiring and a large overall capacitance, there is a problem that power consumption increases when driving. In order to avoid this, there is a drive method as shown in FIGS. 60 and 61, but there is a problem that the number of lead terminals for individually driving the common electrodes increases. The increase in the number of lead terminals causes an increase in the number of drive ICs, an increase in IC cost, and an increase in connection failure. By driving the in-plane switching mode liquid crystal by the capacitive coupling horizontal line inversion driving as in the present invention, the ultra-large liquid crystal display device can be manufactured at low cost and with minimal increase in power consumption. Can be realized. In the case of the horizontal electric field method, unlike the conventional vertical electric field method, it can be formed larger than the capacitance formed by the scanning signal wiring and the liquid crystal drive electrode.
For this reason, as shown in FIG. 41, the driving voltage amplitude V * Can be reduced, the bias voltage applied to the TFT is also reduced, and the characteristic shift of the TFT can be reduced. This makes it possible to lower the formation temperature of the gate insulating film of a thin film transistor (TFT), thereby shortening the tact time when manufacturing a large-sized substrate, reducing the heat distortion and thermal shrinkage of the substrate, and reducing the manufacturing cost. It becomes.
[0029]
According to the means 7, the liquid crystal drive electrode can be formed simultaneously with the formation of the drain electrode of the thin film transistor (TFT). Since a dry etching method is used for processing the thin film silicon layer, miniaturization and processing accuracy can be greatly improved as compared with a conventional processing method using wet etching. As shown in FIG. 42, FIG. 43, FIG. 44, and FIG. 57, by forming the liquid crystal driving electrode at the same time as the drain electrode, the problem of poor contact between the drain electrode and the liquid crystal driving electrode does not occur, and the liquid crystal driving electrode is shared. Since the processing accuracy of the distance between the electrodes and the electrodes is also increased, the occurrence of luminance unevenness on the entire screen is reduced. By processing both the liquid crystal drive electrode and the common electrode by dry etching, the distance between the electrodes can be reduced, so that the liquid crystal drive voltage can be reduced and the response speed of the liquid crystal can be increased at the same time.
[0030]
By using the means 7, 8, 9, 10, 11 as shown in FIGS. 52 and 53, when a horizontal electric field is applied in the pixel electrode (the liquid crystal drive electrode and a part of the common electrode). In the liquid crystal molecules, two kinds of rotational movements, that is, left rotation and right rotation occur inside the pixel electrode. In the conventional in-plane switching method shown in FIG. 51, since only one rotation is performed, when the pre-tilt angle is large, the characteristics of the viewing angle are partially separated as shown in FIG.
When two kinds of rotational movements of liquid crystal molecules, that is, left rotation and right rotation, occur within one pixel, even if the pretilt angle is large, there is no view angle characteristic. Thus, in the in-plane switching mode liquid crystal display device using the structure of the present invention, the pretilt angle is not restricted, and the degree of freedom in selecting the alignment film and the liquid crystal is increased. Since the same materials used in the conventional vertical-field liquid crystal cell process, such as the sealing material, alignment film, and injection port sealing material used in the liquid crystal process can be used, production efficiency and investment efficiency can be increased. . Since the effective utilization rate of the polarizing plate is increased, the cost can be reduced. Gradation inversion can also be prevented.
[0031]
By using the above means 12, 13, and 14, even if the transparent conductive film (ITO) is not provided on the entire surface of the color filter, static electricity is not charged up in the liquid crystal cell process, and adhesion of particles is reduced. The orientation film has the same degree as that of the present invention (10 9 Ω · cm-10 11 (Ω · cm), the effect is increased. As shown in FIGS. 45, 46, 47, 48, and 49, (35), (36), (42), and (40) represent ITO, a metal or a laminate of a metal oxide and a metal, By using a metal silicide and a semiconductor layer activated by impurity doping, external electrostatic damage can be completely prevented after the liquid crystal cell is completed. By using an overcoat layer of a high-resistance layer, an inexpensive electrodeposition color filter can be used for a horizontal electric field type liquid crystal, so that a liquid crystal panel with good flatness, no cell gap unevenness, and good contrast can be manufactured at low cost. It becomes possible.
[0032]
By means of the means 15, the characteristics of the alignment film having a pretilt angle of about 3 to 6 degrees, which has been conventionally used in a vertical electric field type liquid crystal display device, can be changed to a pretilt angle of 1 degree or less. As shown in FIG. 50, by reducing the pretilt angle to 1 degree or less, the viewing angle characteristics of the in-plane switching mode liquid crystal cell can be significantly improved. By using the manufacturing method of the present invention, the alignment film conventionally used in the vertical electric field type liquid crystal cell process can be used without being changed, so that any one of the UV irradiation device, the ion implantation device, and the plasma surface treatment device can be used. A horizontal electric field type liquid crystal display device can be manufactured simply by introducing the table into a conventional liquid crystal cell production line. Production efficiency and investment efficiency can be improved. Further, as shown in FIGS. 54 and 55, by using the masking processing, two or more types of pretilt angles can be set within one pixel, so that the control of the viewing angle characteristics becomes free. Gradation inversion can also be prevented.
[0033]
Even in the case of ultra-high definition display (SXGA or UXGA) in which the frame frequency and the scanning signal wiring increase in the means 16 and 17, the scanning signal wiring address time can be doubled, so that even an amorphous thin film transistor having a slow electron transfer can be sufficiently used. Response is possible. Even when the image is further enlarged, the length of the video signal wiring is reduced to 1 / and the number of intersections between the scanning signal wiring and the video signal wiring is also reduced to で, thereby solving the problem of the resistance of the video signal wiring. . That is, since the metal material used conventionally can be used, there is no need to change the process. Since it can be manufactured by the same process as the conventional VGA and SVGA display devices, production efficiency and investment efficiency are improved. According to the present invention, dot inversion driving can be introduced into ultra-high-definition display, and a low-voltage driving IC can be used. Therefore, high-quality images with low cost and without display unevenness can be realized using amorphous silicon thin film transistors.
[0034]
【Example】
Embodiment 1 FIGS. 4 and 5 are a sectional view and a plan view of a unit pixel according to the present invention. A scanning signal wiring (gate electrode) (1) was formed on a glass substrate (10). The scanning signal wiring is preferably made of a metal capable of performing a positive oxidation treatment such as Al, but may be a pure metal or an alloy such as G, Mo, Ti, W, or TaNb. A two-layer structure, a three-layer structure, or the like of Cu having a low electric resistance value and the refractory metal is used in an ultra-large liquid crystal display device. After forming a gate insulating film (5) on the scanning signal wiring (1), an amorphous silicon (a-Si) film (T) is formed to be an active active layer of a transistor. A video signal wiring (2) and a drain electrode (D) are formed so as to overlap a part of the amorphous silicon. In the case of FIG. 4, the drain electrode (D) and the liquid crystal drive electrode (4) are simultaneously formed of the same metal material. An S: N film or S: O 2 A protective insulating film (6) made of a film is formed. Next, a common electrode (3) is formed. An alignment film (7) made of polyimide was formed on the surface of an active matrix substrate having the above-described unit pixels arranged in a matrix, and the surface was subjected to a rubbing treatment. A liquid crystal composition including rod-like liquid crystal molecules (9) is sealed between the opposing substrate (11) having an alignment film (8) having a rubbed surface formed on the surface thereof and the active matrix substrate. Polarizing plates (12) and (13) were arranged on the outer surfaces of the substrates.
As shown in FIG. 5, the distance between the common electrode (3) and the liquid crystal drive electrode (4) has two types of a and b. In FIG. 5, the distances a and b between the electrodes are symmetrically arranged. . 6, 8, and 10, the number of electrodes is increasing, and the distance between the electrodes is also a combination of a and b, and a combination of a, b, and c. Tidy. Although the combination is considered so as to have a symmetrical arrangement as in FIG. 5, symmetry is not necessarily required.
As shown in FIG. 58, not only three types of a, b, and c but also more types of inter-electrode distances between the common electrode (3) and the liquid crystal drive electrode (4) can be introduced. It is.
[0035]
In the cases of FIGS. 5, 6, 8, and 10, the liquid crystal molecules are easily affected by the electric field from the video signal wiring (2), so that the common electrode (3) is arranged so as to sandwich the (2). It is conventionally known that this can reduce crosstalk in the direction along the video signal wiring (2). In order to further improve the effect, it is preferable to set the inter-electrode distance a closest to the video signal wiring (2) to the largest value. That is, when the distance between the electrodes is set under the condition of a> b ≧ c or a> c ≧ b, the crosstalk can be further reduced.
[0036]
The problem of grayscale inversion occurs when the video signal voltage is too large. In particular, when the liquid crystal pretilt angle is large, grayscale inversion becomes easier when viewed from the inclination of the liquid crystal alignment direction than the front direction. In order to improve this, there is a method of giving two or more types of pretilt angles with respect to the alignment direction, or giving positive and negative pretilt angles. The simplest way is to set the pretilt angle to 0 (zero) degree. . However, in the orientation method by the rubbing treatment used in mass production, the pretilt angle cannot be completely set to zero degree, and a pretilt angle of about 0.5 degree is inevitably generated. As a method of preventing grayscale inversion when viewed from the front and tilt, in a horizontal electric field type liquid crystal display device, two or more types of values of the distance between electrodes within one pixel are set as in the present invention. Is particularly effective. When the liquid crystal is driven by normal 5V driving, it is preferable to arrange the electrodes in a combination of the inter-electrode distance at which the transmittance becomes maximum at 5V or less and the inter-electrode distance at which the transmittance becomes maximum at 5V or more. According to the characteristics shown in FIG. 3, in the case of 5V driving, the distance between the electrodes may be set to two types, 5 μm and 7.5 μm.
[0037]
[Embodiment 2] FIGS. 13 and 64 show a unit in the case where the common electrode is connected to the video signal wiring in the same direction and the common electrode is not connected to each other across the video signal wiring inside the effective display screen. It is a top view of a pixel. In FIG. 13, the connection part of the common electrode covers the upper part of the thin film transistor. In this case, even if the color filter of the opposing substrate does not have the black mask (BM), the semiconductor layer (T) of the thin film transistor has the light. Does not penetrate, so that there is no increase in leakage current when the thin film transistor is turned off. FIGS. 18, 19, 20, 21, 22, and 23 are plan views in which these unit pixels are arranged in a stripe arrangement or a delta arrangement. In FIGS. 20, 22, and 23, the pixel electrode is parallel to the scanning signal wiring, but the connection direction of the common electrode is in the same direction as the video signal wiring.
In order to realize such a planar arrangement, in the conventional cross-sectional structure shown in FIG. 1, the scanning signal wiring (1) and the common electrode (3) are short-circuited. A cross-sectional structure as shown in FIGS. 42, 44 and 57 is required. In these cross-sectional structures, a common electrode is formed on the upper part of the substrate, and a protective insulating film (6) and an upper insulating film (14) below the common electrode are formed of an oxide-based insulating film having a small dielectric constant or an organic insulating film. A membrane can be used. Therefore, it is possible to minimize an increase in load when driving the scanning signal wiring.
[0038]
[Embodiment 3] FIGS. 14 and 15 are plan views in which the common electrode connected in the direction to the video signal wiring in Embodiment 2 is connected and separated into an odd group and an even group outside the effective display screen. is there. FIG. 15 shows two common electrodes as one set. It is also possible to consider three as one set and connect and separate them into an odd group and an even group. FIG. 59 is a plan view of a structural arrangement surrounding the entire effective display screen with odd-numbered group connection electrodes (44) and even-numbered group connection electrodes (45). Each common connection electrode, the scanning signal wiring, and the video signal wiring are connected by a non-linear resistance element for preventing static electricity. With this structure, it is possible to significantly reduce the problem of static electricity failure in the liquid crystal cell process. FIG. 40 shows a liquid crystal in which opposite-phase voltage signal waveforms are applied to a common electrode separated into an odd-numbered group and an even-numbered group in accordance with the period of a scanning signal, and opposed to the odd-numbered and even-numbered common electrodes. FIG. 4 is a drive voltage waveform diagram for applying a video signal waveform having a phase opposite to that of a common electrode to a drive electrode.
FIGS. 16 and 17 are polarity diagrams showing how the video signal voltage is written to the pixels having the structural arrangements of FIGS. 14 and 15 according to the present invention. It is divided into plus and minus based on the common electrode potential. Such a writing drive method is called a dot inversion drive method. With this drive method, horizontal crosstalk does not occur and good images can be obtained. By applying a voltage having a phase opposite to that of the video signal waveform to the common electrode, a large voltage can be applied to the liquid crystal phase. Therefore, the amplitude of the video signal drive is smaller than that of the conventional dot inversion drive in which the potential of the common electrode is fixed. / 2 or less. As a result, an inexpensive IC driven at 5 V can be used, so that the cost can be reduced.
[0039]
[Embodiment 4] FIGS. 24, 27 and 29 show that the liquid crystal drive electrode 4 is more than the additional capacitor formed by overlapping the common electrode 3 with the common electrode 3 via an insulating film. FIG. 4 is a plan view of a unit pixel in a case where an additional capacitance (16) formed by overlapping (4) and a scanning signal wiring (1) via an insulating film is larger.
FIGS. 30, 31, 32, 33, 34, and 35 are plan views in which these unit pixels are arranged in a stripe arrangement or a delta arrangement. In order to realize these planar structures with a good yield, it is desirable to use sectional structures as shown in FIGS. 12, 26, 28, 42, 44, 57 and 65. In order to further increase the additional capacitance formed by the liquid crystal drive electrode and the scanning signal wiring, a cross-sectional structure as shown in FIG. 66 may be used. The overlap area between the liquid crystal drive electrode and the common electrode should be as small as possible.
[0040]
[Embodiment 5] FIG. 41 is a timing chart of a scanning signal voltage waveform and a video signal voltage waveform for driving the in-plane switching mode liquid crystal display panel of the embodiment 4. The scanning signal has a quaternary waveform. The common electrode potential is fixed at a potential close to the central value of the video signal waveform. A capacitive coupling drive system in which Vr (-) or Vr (+) of a scan signal voltage is applied to a liquid crystal composition through an additional capacitor formed by overlapping a liquid crystal drive electrode and a scan signal line via an insulating film. Is used. In a horizontal electric field type liquid crystal display device, the capacitance between pixel electrodes formed between a liquid crystal drive electrode and a common electrode via a liquid crystal composition is much smaller than that of a conventional vertical electrode type, so that the scanning signal wiring , The effect of the additional capacitance is increased, and the voltage amplitude of Vr (−) or Vr (+) can be reduced. For this reason, the bias voltage applied to the scanning signal wiring (gate electrode) and the drain electrode of the thin film transistor is also reduced, and the characteristic shift of the thin film transistor is also reduced. In the horizontal electric field method, since the intersection area between the liquid crystal driving electrode and the common electrode can be reduced, the horizontal line inversion driving method as in the present invention has an advantage that the horizontal stroke can be reduced. Since the signal amplitude of the video signal wiring drive IC can also be reduced, an inexpensive IC with a 5 V power supply can be used. This is effective in cost down.
[0041]
[Embodiment 6] FIGS. 42, 43, 44, 57, 64, 65 and 24 show an embodiment in which a thin film semiconductor layer is doped with an impurity, activated to reduce the resistance, and used as a liquid crystal drive electrode. It is a sectional view and a plan view of a unit pixel. A scanning signal wiring (gate electrode) 1 is formed on a glass substrate 10 and a gate insulating film 5 is formed so as to cover the scanning signal wiring 1 and then an amorphous silicon film is formed and a vacuum is not broken. Then, a back channel side protective insulating film (BP) is continuously formed. At this time, the amorphous silicon film preferably has a thickness of about 300 ° to 700 °. A back channel protective edge film of about 2000 ° is sufficient. Except for the back channel protective insulating film {BP}, the surface of the amorphous silicon film etched with a hydrofluoric acid based etchant is exposed. PH without removing positive resist 3 10 by ion shower doping based on gas Fifteen Pieces / cm 2 The amorphous silicon is doped with phosphorus. After that, an activation process is performed by an excimer laser. PH instead of ion shower doping 3 Phosphorus may be adsorbed on the surface of the amorphous silicon layer by plasma discharge treatment using a gas, and then, when the silicon layer is melted by an excimer laser, the phosphorus may be melt-diffused and activated. The region irradiated with the laser by these processes becomes a polysilicon layer having a low resistance. After removing the positive resist, the next step is to simultaneously form the thin film transistor source and drain electrodes (32) and the liquid crystal drive electrode (S) by dry etching. The advantage of forming the liquid crystal drive electrode with a resistive silicon film is that fine pattern processing by dry etching is possible. It has been pointed out that the response speed of the in-plane switching type liquid crystal display device is slow. However, when the distance between the liquid crystal driving electrode and the common electrode is reduced to about 3 μm, the response speed also increases, and the moving image becomes higher. It is possible to cope with it. If it is up to about 3 μm, it can be processed by conventional wet etching, but the precision of line width control is not sufficient in wet etching. In that regard, in dry etching, reproducibility of processing accuracy has already been proven by IC. Polysilicon doped with impurities is a material that is most suitable for a large-screen liquid crystal display device because it is a material that can be easily dry-etched.
Next, after forming the video signal wiring (2), it is completely covered with the protective insulating film (6). The common electrode (3) is formed last, and this common electrode also uses a material that can be processed by dry etching (a high melting point metal such as Mo, Ti, Nb, Ta and alloys thereof, or silicide compounds thereof). As a result, it is possible to produce an in-plane switching liquid crystal display capable of high-speed response.
[0042]
In FIG. 44, Mo is thinly formed by sputtering or ion plating to further reduce the resistance on the drain electrode which is doped with impurities and activated by laser, and MoSix (molybdenum silicide) is formed by a surface reaction. FIG. In FIG. 57, after an amorphous silicon film doped with an impurity is formed on the amorphous silicon film by a plasma CVD method, the impurity amorphous silicon layer is changed to an impurity polysilicon layer having a low resistance by excimer laser. It is sectional drawing in a case. Molybdenum silicide is also one of the materials that is easy to dry-etch. Similar silicide is formed by sputtering not only Mo but also another high melting point metal.
[0043]
[Embodiment 7] FIGS. 52, 19, 21, 31, and 33 show that the video signal wiring and the pixel electrode (the liquid crystal drive electrode and a part of the common electrode facing the liquid crystal drive electrode) are aligned with the liquid crystal. It is a top view in the case of the structure bent in the range of an angle of ± 1 degree to ± 45 degrees with respect to a direction. The dielectric anisotropy of the liquid crystal molecules is positive. As shown in FIG. 52, when a voltage is applied to the common electrode (3) and the liquid crystal driving electrode (S) and an electric field is generated between the electrodes, the liquid crystal molecules (9) rotate left and right with respect to the bent portion. Make two kinds of rotational movements. Since two kinds of rotational movements can be performed inside the unit pixel, the angle of view angle characteristics does not occur regardless of the magnitude of the pretilt angle.
[0044]
[Embodiment 8] FIGS. 52, 20, 22, 23, 32, 34, and 35 show that the scanning signal wiring and the pixel electrode are at ± 1 ° to ± 45 ° with respect to the liquid crystal alignment direction. FIG. 6 is a plan view in the case of a structure that is bent in the range of the angle of FIG. The dielectric anisotropy of the liquid crystal molecules is positive. As in the case of the seventh embodiment, two kinds of liquid crystal molecule rotational motions, that is, left rotation and right rotation occur inside the unit pixel. The viewing angle characteristic is no longer generated regardless of the magnitude of the pretilt angle.
[0045]
[Embodiment 9] FIGS. 53, 19, 21, 31, and 33 show that the video signal wiring and the pixel electrode are bent in a range from 45 degrees to 135 degrees except 90 degrees with respect to the liquid crystal alignment direction. It is a top view in the case of the structure which has. The dielectric anisotropy of the liquid crystal molecules is negative. As shown in FIG. 53, when a voltage is applied to the common electrode {circle around (3)} and the liquid crystal driving electrode {circle around (S)} and an electric field is generated between the electrodes, the liquid crystal molecules {circle around (22)} rotate counterclockwise and right It makes two kinds of rotational movements of rotation. Since two kinds of rotational movements can be performed inside the unit pixel, the angle of view angle characteristics does not occur regardless of the magnitude of the pretilt angle.
[0046]
[Embodiment 10] FIGS. 53, 20, 22, 23, 32, 34 and 35 show that the scanning signal wiring and the pixel electrode are at 45 to 135 degrees except 90 degrees with respect to the liquid crystal alignment direction. It is a top view in the case of the structure bent in the range of the degree. The dielectric anisotropy of the liquid crystal molecules is negative. As in the ninth embodiment, two kinds of liquid crystal molecule rotational movements, that is, left rotation and right rotation occur inside the unit pixel. Regardless of the magnitude of the pretilt angle, the angle of view angle characteristics does not occur.
[0047]
In each of the seventh, eighth, ninth, and tenth embodiments, the rubbing treatment is performed so that the alignment of the liquid crystal molecules at the interface with the upper and lower substrates is substantially parallel to each other. The polarizing axis (optical axis) of the polarizing plate is arranged so as to be substantially orthogonal in both the upper and lower directions, and a normally black mode in which light does not pass from the pixel when no electric field is applied is used. As shown in FIGS. 36, 37, 38, and 39, the black mask used for these color filters has a part of the BM bent at the same angle as the angle at which the video signal wiring and the scanning signal wiring are bent. There is a feature in the place.
[0048]
[Embodiment 11] FIGS. 45, 46 and 47 are sectional views of a color filter substrate of an in-plane switching mode liquid crystal display device. R, G, B color filters are formed on the glass substrate (11). Next, an organic or inorganic high-resistance material (10 9 Ω · cm-10 11 Ω · cm). As shown in FIG. 56, in the horizontal electric field method, the liquid crystal specific resistance is 10 9 There is an experimental result that the voltage holding ratio hardly decreases even when the voltage decreases to about Ω · cm. In FIGS. 45 and 46, R, G, and B color filter layers are formed by electrodeposition after the transparent ITO is formed on the entire surface. In this case, the sum of the thickness of the high resistance material, the thickness of the color filter layer, and the thickness of the liquid crystal layer is required to be at least twice the distance between the liquid crystal drive electrode and the common electrode. If the total thickness is at least twice the distance between the electrodes, the electric field generated between the liquid crystal drive electrode and the common electrode is largely affected by the transparent conductive film (ITO) formed on the color filter side. Instead, a horizontal electric field can be generated in a direction parallel to the substrate.
[0049]
[Embodiment 12] FIGS. 48 and 49 are cross-sectional views of a color filter substrate of an in-plane switching mode liquid crystal display device. R, G, B color filters are formed on the glass substrate (11). In this state, various problems occur due to static electricity generated in the liquid crystal process. Therefore, a black mask (42) for removing static electricity is formed on the insulating film (41). When a resin black mask has already been formed as shown in FIG. 49, the transparent conductive electrode (40) may be formed in the same pattern as the black mask.
[0050]
As in the eleventh and twelfth embodiments, if no conductive electrode is formed on the color filter substrate side, the in-plane switching type liquid crystal display device is affected by an electric field due to external static electricity, so that it can be put to practical use. The big problem that cannot be done occurs. As shown in FIG. 67, there is a method in which a transparent conductive film (36) is formed on the outside of the color filter-side glass substrate. In this case, however, a color filter layer or a flattening film having high insulating properties is formed during the liquid crystal process. In some cases, the trapped static electricity cannot be removed while trapped, which causes poor alignment.
[0051]
[Thirteenth Embodiment] As shown in FIGS. 50 and 51, if the liquid crystal driving electrode and the common electrode are simply arranged in parallel, the viewing angle characteristic is partially separated when the pretilt angle of the liquid crystal is large. . Since the pretilt angle of the alignment film used in the conventional vertical electric field type liquid crystal display device is as large as 3 ° to 7 °, the viewing angle characteristic is inevitably generated from one side. As a method of reducing the pretilt angle to 1 degree or less using the same alignment film, after baking the polyimide alignment film, UV irradiation treatment, He, Ne, Ar, N 2 , O 2 A method of ionizing such a gas and performing an ion plantation process has been developed. O using reactive ion etching equipment 2 The same effect is obtained by plasma processing using gas. By performing a rubbing alignment treatment after performing these treatments, the pretilt angle can be reduced to 1 degree or less, and the liquid crystal molecules can be aligned in a uniaxial direction. As shown in FIGS. 54 and 55, the UV treatment, the ion plantation treatment, and the plasma treatment can be limited to half of one pixel by using a photomask or a mask using a photoresist.
By using this embodiment, even if the conventionally used alignment film is used in a liquid crystal display device of a horizontal electric field type, it will not be generated more than a piece of viewing angle characteristics.
[0052]
[Embodiment 14] FIG. 62 shows that the common electrodes are connected to the video signal wiring in the same direction as in the embodiment 2, and within the effective display screen, the common electrodes cross each other across the video signal wiring. Not connected. The common electrode is divided into an odd group and an even group, and the odd groups are connected to each other outside the effective display screen. The difference from the second embodiment is that the video signal wiring is vertically divided into two at the center. The terminals to be connected to the IC for driving the video signal wiring are also divided into two upper and lower parts, respectively, and the number of terminals is doubled. When the number of scanning signal lines is greatly increased like SXGA and UXGA for OA, the structure of the present embodiment reduces the resistance of the video signal wiring and reduces the number of intersections with the scanning signal lines by half. Because of the reduction, the coupling capacitance is reduced, so that the driving load of the video signal wiring is greatly reduced.
[0053]
[Embodiment 15] FIG. 63 shows a drive voltage waveform for driving the liquid crystal display device of the in-plane switching method of the fourteenth embodiment. Two scanning signal lines are simultaneously operated in the upper half region and the lower half region. Since the common electrode is connected in the upper half region and the lower half region, it is driven by a method in which the polarity is inverted in accordance with the driving cycle of the scanning signal wiring. The common electrodes are divided into odd-numbered groups and even-numbered groups, and are connected to common connection electrodes (44) and (45), respectively. Opposite-phase voltages having different polarities are applied to the odd-numbered group and the even-numbered group in reverse according to the period of the scanning signal wiring. The video signal wiring is divided into an odd-numbered group and an even-numbered group, and opposite-phase signal voltages having polarities different from those of the corresponding odd-numbered group and even-numbered group common electrodes are applied. The odd-numbered and even-numbered video signal wirings are divided into upper and lower halves, and different in-phase video signals are applied. This is a two-scan line simultaneous access dot inversion drive system. In the case of a display device for OA such as a computer, a frame memory is prepared, so that image data for two scanning signal wirings may be simultaneously extracted from the frame memory. When the number of scanning signal lines and the frame frequency are greatly increased as in the case of SXGA and UXGA, the selection time of the scanning signal lines becomes 10 μsec or less if the conventional one-scan signal line access method is used. If the time is less than 10 μsec, the driving capability of the amorphous silicon thin film transistor is approached and the video signal voltage cannot be accurately transmitted to the liquid crystal driving electrode. In the two-scan-line simultaneous access dot inversion driving method of the present invention, the selection time is twice as long as that of the conventional method, so that a sufficient video signal writing time can be reduced even with an amorphous silicon thin film transistor. The degree of freedom of the material for the video signal wiring is greatly increased.
[0054]
【The invention's effect】
According to the present invention, firstly, it is possible to obtain an image having good viewing angle characteristics without grayscale inversion of the image. Secondly, an inexpensive 5VIC can be used for the video signal driving IC and a conventional liquid crystal member can be used, so that a reliable image display device with low cost can be provided. Third, a horizontal electric field liquid crystal display device capable of operating at a high speed and capable of handling moving images without being affected by external static electricity can be manufactured. Fourth, an ultra-high-definition, large-screen liquid crystal display device can be realized using amorphous silicon thin film transistors.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a unit pixel of a conventional in-plane switching mode liquid crystal display device.
FIG. 2 is a plan view of a unit pixel of a conventional in-plane switching mode liquid crystal display device.
FIG. 3 is a graph showing transmittance and driving voltage characteristics depending on the distance between electrodes of a lateral electric field liquid crystal display device.
FIG. 4 is a cross-sectional view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 5 is a plan view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 6 is a plan view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 7 is a layout combination diagram of the distance between electrodes in the in-plane switching method according to the present invention.
FIG. 8 is a plan view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 9 is a layout combination diagram of the distance between electrodes in the in-plane switching method according to the present invention.
FIG. 10 is a plan view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 11 is a layout combination diagram of the distance between electrodes in the in-plane switching method according to the present invention.
FIG. 12 is a sectional view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 13 is a plan view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 14 is a plan view of a pixel array of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 15 is a plan view of a pixel array of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 16 is a plan view of a polarity arrangement of video signal data of pixels of the in-plane switching display device of the present invention.
FIG. 17 is a plan view of the polarity arrangement of video signal data of pixels of the in-plane switching display device of the present invention.
FIG. 18 is a plan view of a lateral electric field type pixel array of the present invention.
FIG. 19 is a plan view of a horizontal electric field type pixel array of the present invention.
FIG. 20 is a plan view of a lateral electric field type pixel array of the present invention.
FIG. 21 is a plan view of a horizontal electric field type pixel array according to the present invention.
FIG. 22 is a plan view of an in-plane switching mode pixel array according to the present invention.
FIG. 23 is a plan view of a lateral electric field type pixel array of the present invention.
FIG. 24 is a plan view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 25 is a plan view of the polarity arrangement of video signal data of pixels of the in-plane switching display device of the present invention.
FIG. 26 is a sectional view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 27 is a plan view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 28 is a sectional view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 29 is a plan view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 30 is a plan view of a lateral electric field type pixel array of the present invention.
FIG. 31 is a plan view of a lateral electric field type pixel array of the present invention.
FIG. 32 is a plan view of a lateral electric field type pixel array of the present invention.
FIG. 33 is a plan view of a lateral electric field type pixel array of the present invention.
FIG. 34 is a plan view of a lateral electric field type pixel array of the present invention.
FIG. 35 is a plan view of a horizontal electric field type pixel array of the present invention.
FIG. 36 is an arrangement plan view of a color filter black mask (BM) of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 37 is an arrangement plan view of a color filter black mask (BM) of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 38 is an arrangement plan view of a color filter black mask (BM) of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 39 is an arrangement plan view of a color filter black mask (BM) of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 40 shows a drive voltage waveform of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 41 shows a driving voltage waveform of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 42 is a sectional view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 43 is a plan view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 44 is a sectional view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 45 is a sectional view of a color filter for an in-plane switching mode liquid crystal display device according to the present invention.
FIG. 46 is a cross-sectional view of a color filter for an in-plane switching mode liquid crystal display device of the present invention.
FIG. 47 is a cross-sectional view of a color filter for an in-plane switching mode liquid crystal display device according to the present invention.
FIG. 48 is a sectional view of a color filter for an in-plane switching mode liquid crystal display device according to the present invention.
FIG. 49 is a cross-sectional view of a color filter for an in-plane switching mode liquid crystal display device according to the present invention.
FIG. 50 is a distribution diagram of pretilt angles and viewing angle characteristics of liquid crystal molecules of a liquid crystal display device of an in-plane switching mode.
FIG. 51 is an orientation diagram of a positive dielectric anisotropic liquid crystal in a lateral electric field type pixel electrode.
FIG. 52 is a view showing an orientation direction of a positive dielectric anisotropy liquid crystal in a bent pixel electrode of an in-plane switching method according to the present invention.
FIG. 53 is a view showing an orientation direction of a negative dielectric anisotropy liquid crystal in a lateral electric field bending pixel electrode of the present invention.
FIG. 54 is a plan view of a pixel array obtained by subjecting a polyimide alignment film of the in-plane switching display device of the present invention to a local UV irradiation process.
FIG. 55 is a plan view of a pixel array in which a local UV irradiation process is applied to a polyimide alignment film of the in-plane switching display device of the present invention.
FIG. 56 is a characteristic diagram of a liquid crystal specific resistance value and a voltage holding ratio of an in-plane switching mode liquid crystal display device.
FIG. 57 is a sectional view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 58 is a plan view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 59 is a plan view showing the arrangement of pixels and connection electrodes for driving a common electrode in the in-plane switching mode liquid crystal display device of the present invention.
FIG. 60 is a plan view showing the arrangement of pixels and terminal portions for driving a common electrode of a lateral electric field type liquid crystal display device.
FIG. 61 shows a driving voltage waveform of a lateral electric field type liquid crystal display device.
FIG. 62 is a plan view showing the arrangement of pixels and connection electrodes for driving a common electrode in the in-plane switching mode liquid crystal display device of the present invention.
FIG. 63 shows a driving voltage waveform of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 64 is a plan view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 65 is a sectional view of a unit pixel of the in-plane switching mode liquid crystal display device of the present invention.
FIG. 66 is a sectional view of a unit pixel storage capacitor forming portion of the in-plane switching mode liquid crystal display device of the present invention;
FIG. 67 is a cross-sectional view of a conventional color filter for an in-plane switching mode liquid crystal display device.
[Explanation of symbols]
1-Scan signal wiring
2- Video signal wiring
3-Common electrode
4- Liquid crystal drive electrode
5-gate insulating film
6-Protective insulation film
7- Liquid crystal alignment film (TFT substrate side)
8-Liquid crystal alignment film (opposite substrate side ... color filter substrate side)
9- Liquid crystal molecules (positive dielectric anisotropy liquid crystal)
10-TFT side glass substrate
11-Opposite glass substrate
12-TFT substrate side polarizing plate
13- Opposite substrate side polarizing plate
14-Upper insulating film
15-Drain through hole
16-Storage capacitance forming area
17-anodized film
18—Common electrode (center line) formed simultaneously with the same material as the scanning signal wiring
19-common electrode through hole
20- Common electrode (center line) and pixel electrode in contact with common electrode through hole
21- Color filter black mask
22-Liquid crystal molecule (negative dielectric anisotropy liquid crystal)
23-scan signal wiring drive waveform
24-Odd number video signal waveform
25-even number video signal waveform
26- Odd number common electrode drive waveform
27-even number common electrode drive waveform
28- (n-1) th scan signal wiring drive waveform
29-nth scan signal wiring drive waveform
30-video signal waveform
31-common electrode potential
32-polysilicon drain electrode activated and reduced in resistance after impurity ion implantation
33- Drain electrode having metal silicide formed on polysi semiconductor layer activated after impurity ion implantation
Semiconductor drain electrode doped with impurity on 34-non-doped amorphous silicon layer
35- Black mask with anti-reflection coating
36-transparent conductive layer
37- color filter layer
38-High resistance flattening film
39-resin black mask
40- Black mask electrode with antireflection film for antistatic
41-flattening insulating film
42- Antistatic black mask electrode
43-Static element
44- Odd-numbered common electrode driving connection electrode
45- Even number common electrode drive connection electrode
46- Electrostatic connection electrode
47-nth common electrode drive waveform
48-upper half area n-th scan signal wiring drive waveform
49-Lower half area n-th scan signal wiring drive waveform
50-upper half area M-number video signal waveform
51-Lower half area M-number video signal waveform
52-Mth common electrode drive waveform
53-upper half area video signal wiring
54-lower half area video signal wiring
55-upper half area scanning signal wiring
56-Lower half area scanning signal wiring
57-Additional capacity contact through hole
The angle at which the alignment direction of the AP liquid crystal molecules intersects the pixel electrode (common electrode and liquid crystal drive electrode)
The angle at which the alignment direction of the BN type liquid crystal molecules intersects the pixel electrode (common electrode and liquid crystal drive electrode)
BP-Back channel side protective insulating film
P-Alignment direction of liquid crystal molecules and polarization axis direction of polarizing plate (optical axis)
Q-polarization axis direction (optical axis) of polarizing plate
D-transistor / drain electrode formed simultaneously with video signal wiring
Poly-si liquid crystal driving electrode which has been activated by laser annealing after ion implantation of S-impurities and has reduced resistance
T-semiconductor layer
UV-irradiated U-alignment film and rubbed area for low pretilt
A liquid crystal driving electrode in which metal silicide is formed on a poly-si impurity semiconductor layer by laser annealing after J-impurity ion implantation
Semiconductor liquid crystal drive electrode doped with impurities on K-non-doped amorphous silicon layer
a-Distance between common electrode and liquid crystal drive electrode
b-Distance between common electrode and liquid crystal drive electrode
c-Distance between common electrode and liquid crystal drive electrode
SC-additional capacitance electrode for driving liquid crystal formed simultaneously with video signal wiring

Claims (20)

  1. In an active matrix type horizontal electric field type liquid crystal display device formed of two substrates, a TFT-array substrate and a color filter substrate, a common electrode, a liquid crystal driving electrode, a video signal wiring, and a scanning line have a TFT-array on one side. All are formed on the substrate, and the common electrode and the liquid crystal drive electrode are arranged substantially in parallel with the video signal wiring, and the common electrodes are provided on both sides of the video signal wiring close to the video signal wiring. The liquid crystal driving electrode and the common electrode are arranged so as to shield an electric field, and the distance between the electrodes between the liquid crystal driving electrode and the common electrode is configured as a combination of two or more types in one pixel, and the center is a boundary in one pixel. At least two types of electrodes are arranged so that the distance between them is symmetrical, and the distance between the common electrode and the liquid crystal drive electrode closest to the video signal wiring is the longest. A horizontal electric field characterized by a structure in which the video signal wiring, the liquid crystal driving electrode, and the common electrode are bent within a range of ± 1 degree to ± 45 degrees within one pixel with respect to the alignment direction of the liquid crystal molecules. Liquid crystal display device.
  2. According to claim 1, the black mask (BM) and the color filter layer on the color filter substrate side are also bent within a range of ± 1 ° to ± 45 ° within one pixel with respect to the alignment direction of the liquid crystal molecules, similarly to the video signal wiring. A horizontal electrolytic liquid crystal display device characterized by the following structure.
  3. In an active matrix type horizontal electric field type liquid crystal display device formed of two substrates, a TFT-array substrate and a color filter substrate, a common electrode, a liquid crystal driving electrode, a video signal wiring, and a scanning line have a TFT-array on one side. All are formed on the substrate, and the common electrode and the liquid crystal drive electrode are arranged substantially in parallel with the video signal wiring, and the common electrodes are provided on both sides of the video signal wiring close to the video signal wiring. The liquid crystal driving electrode and the common electrode are arranged so as to shield an electric field, and the distance between the electrodes between the liquid crystal driving electrode and the common electrode is configured as a combination of two or more types in one pixel, and the center is a boundary in one pixel. At least two types of electrodes are arranged so that the distance between them is symmetrical, and the distance between the common electrode and the liquid crystal drive electrode closest to the video signal wiring is the longest. And the video signal wiring, the liquid crystal drive electrode, and the common electrode are bent in a range of 45 degrees to 135 degrees excluding 90 degrees in one pixel with respect to the alignment direction of the liquid crystal molecules. Horizontal electric field type liquid crystal display device.
  4. According to claim 1, the black mask (BM) and the color filter layer on the color filter substrate side are in the range of 45 degrees to 135 degrees excluding 90 degrees within one pixel with respect to the alignment direction of the liquid crystal molecules, similarly to the video signal wiring. A horizontal electrolysis type liquid crystal display device characterized by a structure that is bent.
  5. In an active matrix type horizontal electric field type liquid crystal display device formed of two substrates, a TFT-array substrate and a color filter substrate, a common electrode, a liquid crystal driving electrode, a video signal wiring, and a scanning line have a TFT-array on one side. All are formed on the substrate, and the common electrode and the liquid crystal drive electrode are arranged substantially in parallel with the scanning signal wiring, and the common electrodes are provided on both sides of the scanning signal wiring close to the scanning signal wiring. The liquid crystal driving electrode and the common electrode are arranged so as to shield an electric field, and the distance between the electrodes between the liquid crystal driving electrode and the common electrode is configured as a combination of two or more types in one pixel, and the center is a boundary in one pixel. The distance between two or more types of electrodes is arranged vertically symmetrically, and the distance between the common electrode closest to the scanning signal wiring and the liquid crystal drive electrode is the longest. A horizontal electric field characterized by a structure in which the scanning signal wiring, the liquid crystal driving electrode, and the common electrode are bent within a range of ± 1 degree to ± 45 degrees within one pixel with respect to the alignment direction of the liquid crystal molecules. Liquid crystal display device.
  6. According to claim 5, the black mask (BM) and the color filter layer on the color filter substrate side are also bent within a range of ± 1 ° to ± 45 ° within one pixel with respect to the alignment direction of the liquid crystal molecules, similarly to the scanning signal wiring. A horizontal electrolytic liquid crystal display device characterized by the following structure.
  7. In an active matrix type horizontal electric field type liquid crystal display device formed of two substrates, a TFT-array substrate and a color filter substrate, a common electrode, a liquid crystal driving electrode, a video signal wiring, and a scanning line have a TFT-array on one side. All are formed on the substrate, and the common electrode and the liquid crystal drive electrode are arranged substantially in parallel with the scanning signal wiring, and the common electrodes are provided on both sides of the scanning signal wiring close to the scanning signal wiring. The liquid crystal driving electrode and the common electrode are arranged so as to shield an electric field, and the distance between the electrodes between the liquid crystal driving electrode and the common electrode is configured as a combination of two or more types in one pixel, and the center is a boundary in one pixel. The distance between two or more types of electrodes is arranged vertically symmetrically, and the distance between the common electrode closest to the scanning signal wiring and the liquid crystal drive electrode is the longest. And the scanning signal wiring, the liquid crystal driving electrode, and the common electrode are bent in a range of 45 degrees to 135 degrees excluding 90 degrees in one pixel with respect to the alignment direction of the liquid crystal molecules. Horizontal electric field type liquid crystal display device.
  8. According to claim 7, the black mask (BM) and the color filter layer on the color filter substrate side have a range of 45 degrees to 135 degrees excluding 90 degrees within one pixel with respect to the alignment direction of the liquid crystal molecules, similarly to the scanning signal wiring. A horizontal electrolysis type liquid crystal display device characterized by a structure that is bent.
  9. In an active matrix type horizontal electric field type liquid crystal display device formed of two substrates, a TFT-array substrate and a color filter substrate, a common electrode, a liquid crystal driving electrode, a video signal wiring, and a scanning line have a TFT-array on one side. After being formed on the substrate and forming the scanning signal wiring, the video signal wiring and the liquid crystal drive electrode are formed, and finally the common electrode shields the electric field of the video signal wiring on both sides of the video signal wiring. The common electrode is formed on a passivation layer (uppermost protective layer) so as to sandwich the video signal wiring, and the common electrode extends horizontally (extends the scanning signal wiring) in the upper layer of the passivation layer covering the video signal wiring. And the distance between the liquid crystal drive electrode and the common electrode is made up of two or more combinations in one pixel. And wherein two or more of the inter-electrode distance by the central pixel as a boundary are arranged to be symmetrical. A horizontal electric field type liquid crystal display device characterized in that the distance between the common electrode closest to the video signal wiring and the liquid crystal drive electrode is the longest.
  10. In an active matrix type horizontal electric field type liquid crystal display device formed of two substrates, a TFT-array substrate and a color filter substrate, a common electrode, a liquid crystal driving electrode, a video signal wiring, and a scanning line have a TFT-array on one side. After being formed on the substrate and forming the scanning signal wiring, the video signal wiring and the liquid crystal drive electrode are formed, and finally the common electrode shields the electric field of the video signal wiring on both sides of the video signal wiring. The common electrode is formed on the passivation layer (the uppermost protective layer) so as to sandwich the video signal wiring, and the common electrode covers the scanning signal wiring. Direction) and the distance between the liquid crystal drive electrode and the common electrode is comprised of two or more combinations within one pixel. The distance between the two or more types of electrodes is symmetrical with respect to the center of one pixel, and the distance between the common electrode closest to the video signal wiring and the liquid crystal drive electrode is A horizontal electric field type liquid crystal display device characterized by being the largest.
  11. The image signal wiring, the liquid crystal drive electrode, and the common electrode are bent at an angle of ± 1 degree to ± 45 degrees within one pixel with respect to the alignment direction of the liquid crystal molecules. A horizontal electric field type liquid crystal display device characterized by the above-mentioned.
  12. According to claim 9 or claim 10, the video signal wiring, the liquid crystal drive electrode, and the common electrode are bent at an angle of ± 1 ° to ± 45 ° within one pixel with respect to the alignment direction of the liquid crystal molecules, In addition, the black mask (BM) and the color filter layer on the color filter substrate side are also bent at an angle of ± 1 ° to ± 45 ° within one pixel with respect to the alignment direction of the liquid crystal molecules in substantially the same manner as the video signal wiring. A horizontal electric field color liquid crystal display device characterized by the following structure.
  13. According to claim 9 or claim 10, the video signal wiring, the liquid crystal drive electrode, and the common electrode are bent at an angle of 45 degrees to 135 degrees excluding 90 degrees within one pixel with respect to the alignment direction of the liquid crystal molecules. An in-plane switching mode liquid crystal display device.
  14. According to claim 9 or claim 10, the video signal wiring, the liquid crystal drive electrode, and the common electrode are bent in an angle range of 45 degrees to 135 degrees excluding 90 degrees within one pixel with respect to the alignment direction of the liquid crystal molecules. Also, the black mask (BM) and the color filter layer on the color filter substrate side have an angle of 45 ° to 135 ° except 90 ° within one pixel with respect to the alignment direction of the liquid crystal molecules in almost the same manner as the video signal wiring. A horizontal electric field type color liquid crystal display device characterized by being bent in a vertical direction.
  15. In an active matrix type horizontal electric field type liquid crystal display device formed of two substrates, a TFT-array substrate and a color filter substrate, a common electrode, a liquid crystal driving electrode, a video signal wiring, and a scanning line have a TFT-array on one side. After being formed on the substrate and forming the scanning signal wiring, the video signal wiring and the liquid crystal drive electrode are formed, and finally the common electrode shields the electric field of the video signal wiring on both sides of the video signal wiring. The common electrode is formed on the passivation layer (the uppermost protective layer) so as to sandwich the video signal wiring, and the common electrode covers the scanning signal wiring. And the distance between the liquid crystal drive electrode and the common electrode is made up of two or more combinations in one pixel. The distance between the common electrode and the liquid crystal drive electrode, which is arranged so that the distance between the two or more types of electrodes is vertically symmetric with respect to the center of one pixel, and is the closest to the video signal wiring. The horizontal electric field type liquid crystal display device characterized by having the largest value.
  16. In an active matrix type horizontal electric field type liquid crystal display device formed of two substrates, a TFT-array substrate and a color filter substrate, a common electrode, a liquid crystal driving electrode, a video signal wiring, and a scanning line have a TFT-array on one side. After being formed on the substrate and forming the scanning signal wiring, the video signal wiring and the liquid crystal drive electrode are formed, and finally the common electrode shields the electric field of the scanning signal wiring on both sides of the scanning signal wiring. The common electrode is formed on a passivation layer (uppermost protective layer) so as to sandwich the scanning signal wiring, and the common electrode covers the scanning signal wiring. And the distance between the liquid crystal drive electrode and the common electrode is made up of two or more combinations in one pixel. And a distance between the common electrode and the liquid crystal drive electrode, which is arranged so that the distance between the two or more types of electrodes is vertically symmetric with respect to the center of one pixel, and which is closest to the scanning signal wiring. The horizontal electric field type liquid crystal display device characterized by having the largest value.
  17. According to claim 15 or claim 16, the scanning signal wiring, the liquid crystal drive electrode, and the common electrode are bent at an angle of ± 1 ° to ± 45 ° within one pixel with respect to the alignment direction of the liquid crystal molecules. An in-plane switching mode liquid crystal display device.
  18. According to claim 15 or claim 16, the scanning signal wiring, the liquid crystal drive electrode, and the common electrode are bent at an angle of ± 1 ° to ± 45 ° within one pixel with respect to the alignment direction of the liquid crystal molecules. In addition, the black mask (BM) on the color filter substrate side and the color filter layer are also bent at an angle of ± 1 ° to 45 ° within one pixel with respect to the alignment direction of the liquid crystal molecules in substantially the same manner as the scanning signal wiring. A horizontal electric field type liquid crystal display device characterized by the following structure.
  19. According to claim 15 or claim 16, with respect to the alignment direction of the liquid crystal molecules, the scanning signal wiring, the liquid crystal drive electrode, and the common electrode are bent at an angle of 45 to 135 degrees excluding 90 degrees within one pixel. An in-plane switching mode liquid crystal display device.
  20. According to claim 15 or claim 16, with respect to the alignment direction of the liquid crystal molecules, the scanning signal wiring, the liquid crystal drive electrode, and the common electrode are bent at an angle of 45 to 135 degrees excluding 90 degrees within one pixel. In addition, the black mask (BM) on the color filter substrate side and the color filter layer also have an angle of 45 ° to 135 ° except 90 ° within one pixel with respect to the alignment direction of the liquid crystal molecules in almost the same manner as the scanning signal wiring. A horizontal electric field type color liquid crystal display device characterized by being bent in an angle range.
JP27279296A 1996-08-19 1996-08-19 Liquid crystal display Expired - Fee Related JP3567183B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27279296A JP3567183B2 (en) 1996-08-19 1996-08-19 Liquid crystal display

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP27279296A JP3567183B2 (en) 1996-08-19 1996-08-19 Liquid crystal display
PCT/JP1997/002862 WO1998008134A1 (en) 1996-08-19 1997-08-18 Liquid crystal display device
TW86111895A TW406206B (en) 1996-08-19 1997-08-20 Liquid crystal display

Publications (2)

Publication Number Publication Date
JPH1062802A JPH1062802A (en) 1998-03-06
JP3567183B2 true JP3567183B2 (en) 2004-09-22

Family

ID=17518813

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27279296A Expired - Fee Related JP3567183B2 (en) 1996-08-19 1996-08-19 Liquid crystal display

Country Status (3)

Country Link
JP (1) JP3567183B2 (en)
TW (1) TW406206B (en)
WO (1) WO1998008134A1 (en)

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3120751B2 (en) 1996-11-06 2000-12-25 日本電気株式会社 A liquid crystal display device in a horizontal electric field method
JP3481509B2 (en) 1999-06-16 2003-12-22 Nec液晶テクノロジー株式会社 Liquid Crystal Display
JP3264270B2 (en) 1999-07-26 2002-03-11 日本電気株式会社 The liquid crystal display device
JP2002323706A (en) 2001-02-23 2002-11-08 Nec Corp Active matrix liquid crystal display device of transverse electric field system and method for manufacturing the same
US7064740B2 (en) 2001-11-09 2006-06-20 Sharp Laboratories Of America, Inc. Backlit display with improved dynamic range
KR100984345B1 (en) * 2003-05-30 2010-09-30 삼성전자주식회사 thin film transistor array panel and liquid crystal display including the panel
FR2870947B1 (en) * 2004-05-31 2008-02-01 Lg Philips Lcd Co Ltd Liquid crystal display and control method
JP4154598B2 (en) 2003-08-26 2008-09-24 セイコーエプソン株式会社 Liquid crystal display device driving method, liquid crystal display device, and portable electronic device
KR100564219B1 (en) 2003-12-11 2006-03-28 엘지.필립스 엘시디 주식회사 An array substrate for In-Plane Switching mode Liquid Crystal Display Device
US7872631B2 (en) 2004-05-04 2011-01-18 Sharp Laboratories Of America, Inc. Liquid crystal display with temporal black point
US7777714B2 (en) 2004-05-04 2010-08-17 Sharp Laboratories Of America, Inc. Liquid crystal display with adaptive width
US7602369B2 (en) 2004-05-04 2009-10-13 Sharp Laboratories Of America, Inc. Liquid crystal display with colored backlight
US8395577B2 (en) 2004-05-04 2013-03-12 Sharp Laboratories Of America, Inc. Liquid crystal display with illumination control
KR101050348B1 (en) * 2004-05-31 2011-07-19 엘지디스플레이 주식회사 Transverse electric field liquid crystal display device
US7023451B2 (en) 2004-06-14 2006-04-04 Sharp Laboratories Of America, Inc. System for reducing crosstalk
KR100789091B1 (en) * 2004-06-30 2007-12-26 엘지.필립스 엘시디 주식회사 In-Plane-Switching mode Liquid Crystal Display device and the fabrication method thereof
KR101098891B1 (en) 2004-09-30 2011-12-26 엘지디스플레이 주식회사 In-Plane Switching mode Liquid crystal display device
US8050512B2 (en) 2004-11-16 2011-11-01 Sharp Laboratories Of America, Inc. High dynamic range images from low dynamic range images
US8050511B2 (en) 2004-11-16 2011-11-01 Sharp Laboratories Of America, Inc. High dynamic range images from low dynamic range images
KR101112584B1 (en) * 2004-12-27 2012-02-15 엘지디스플레이 주식회사 In-Plane Switching mode Liquid crystal display device
US7898519B2 (en) 2005-02-17 2011-03-01 Sharp Laboratories Of America, Inc. Method for overdriving a backlit display
KR101158116B1 (en) * 2005-03-04 2012-06-19 엘지디스플레이 주식회사 In plane switching mode liquid crystal display device
KR101256660B1 (en) * 2005-08-31 2013-04-19 엘지디스플레이 주식회사 In-Plane-Switching mode Liquid Crystal Display Device and the fabrication method thereof
US9143657B2 (en) 2006-01-24 2015-09-22 Sharp Laboratories Of America, Inc. Color enhancement technique using skin color detection
US8121401B2 (en) 2006-01-24 2012-02-21 Sharp Labortories of America, Inc. Method for reducing enhancement of artifacts and noise in image color enhancement
EP1843194A1 (en) 2006-04-06 2007-10-10 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device, semiconductor device, and electronic appliance
TWI641897B (en) 2006-05-16 2018-11-21 日商半導體能源研究所股份有限公司 Liquid crystal display device
JP2007334317A (en) * 2006-05-16 2007-12-27 Semiconductor Energy Lab Co Ltd Liquid crystal display device and semiconductor device
JP4952158B2 (en) * 2006-09-15 2012-06-13 ソニー株式会社 Manufacturing method of liquid crystal device
US8941580B2 (en) 2006-11-30 2015-01-27 Sharp Laboratories Of America, Inc. Liquid crystal display with area adaptive backlight
JP5429584B2 (en) 2007-09-26 2014-02-26 Nltテクノロジー株式会社 Display device, portable device using the same, and terminal device
KR101096356B1 (en) * 2007-11-14 2011-12-20 하이디스 테크놀로지 주식회사 In-plane switching mode liquid crystal display device
US8760479B2 (en) 2008-06-16 2014-06-24 Samsung Display Co., Ltd. Liquid crystal display
JP5610710B2 (en) * 2008-09-30 2014-10-22 株式会社ジャパンディスプレイ Liquid crystal devices and electronic devices
US8310609B2 (en) * 2008-09-30 2012-11-13 Sony Corporation Liquid crystal device, electronic apparatus, and method of manufacturing liquid crystal device
JP5454872B2 (en) * 2008-09-30 2014-03-26 株式会社ジャパンディスプレイ Liquid crystal devices and electronic equipment
JP5314140B2 (en) 2009-07-13 2013-10-16 シャープ株式会社 Liquid Crystal Display
US8804081B2 (en) * 2009-12-18 2014-08-12 Samsung Display Co., Ltd. Liquid crystal display device with electrode having opening over thin film transistor
JP2013007956A (en) * 2011-06-27 2013-01-10 Japan Display Central Co Ltd Liquid crystal display device
JP2013097190A (en) * 2011-11-01 2013-05-20 Japan Display Central Co Ltd Liquid crystal display device
JP6431321B2 (en) * 2014-09-12 2018-11-28 株式会社ジャパンディスプレイ Liquid crystal display

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6256491B2 (en) * 1979-07-25 1987-11-26 Sharp Kk
JPS5952802B2 (en) * 1980-04-01 1984-12-21 Dainippon Printing Co Ltd
JPS63234203A (en) * 1987-03-23 1988-09-29 Toshiba Corp Production of color filter
JPS6484221A (en) * 1987-09-28 1989-03-29 Matsushita Electric Ind Co Ltd Production of liquid crystal display device
JP2906470B2 (en) * 1989-08-23 1999-06-21 セイコーエプソン株式会社 Active matrix substrate
JP2982877B2 (en) * 1990-12-25 1999-11-29 日本電気株式会社 Active matrix liquid crystal display device
JPH05143020A (en) * 1991-11-18 1993-06-11 Nec Gumma Ltd Driving method for matrix type liquid crystal display device
JP3210443B2 (en) * 1992-09-29 2001-09-17 シチズン時計株式会社 The liquid crystal display device
JP2914851B2 (en) * 1992-12-04 1999-07-05 富士通株式会社 The liquid crystal display device and manufacturing method thereof
JP2701698B2 (en) * 1993-07-20 1998-01-21 株式会社日立製作所 The liquid crystal display device
JP3294689B2 (en) * 1993-11-09 2002-06-24 株式会社日立製作所 The liquid crystal display device
JPH07191336A (en) * 1993-12-27 1995-07-28 Toshiba Corp Liquid crystal display device
CN1055769C (en) * 1994-03-17 2000-08-23 株式会社日立制作所 The active matrix type liquid crystal display system and a method for driving
JPH085990A (en) * 1994-06-24 1996-01-12 Toshiba Corp Active matrix type liquid crystal display device and its driving method
WO1996000408A1 (en) * 1994-06-24 1996-01-04 Hitachi, Ltd. Active matrix type liquid crystal display device and its driving method

Also Published As

Publication number Publication date
WO1998008134A1 (en) 1998-02-26
TW406206B (en) 2000-09-21
JPH1062802A (en) 1998-03-06

Similar Documents

Publication Publication Date Title
US7495735B2 (en) Liquid crystal display
US7773183B2 (en) Method for manufacturing an in-plane switching mode liquid crystal display device
US6825906B2 (en) Multi-domain liquid crystal display device with dielectric frame
US6172733B1 (en) Liquid crystal display including conductive layer passing through multiple layers and method of manufacturing same
KR100858005B1 (en) Liquid crystal display device and manufacturing method thereof
US6784965B2 (en) In-plane switching mode liquid crystal display device and manufacturing method thereof
JP3811663B2 (en) Manufacturing method and structure of in-plane switching liquid crystal display array
US6384888B2 (en) In-plane switching mode liquid crystal display device
CN100334496C (en) Active matrix vertical orientation mode liquid crystal display and its driving method
US6646707B2 (en) Fringe field switching mode LCD
JP3014291B2 (en) Liquid crystal display panel, a method of manufacturing a liquid crystal display device and a liquid crystal display panel
US7632692B2 (en) Liquid crystal display, thin film transistor array panel therefor, and manufacturing method thereof
JP2701698B2 (en) The liquid crystal display device
US7227609B2 (en) In-plane switching mode thin film transistor liquid crystal display device with wide viewing angle
US7009672B2 (en) Multi-domain liquid crystal display device
US20010019391A1 (en) Multi-domain liquid crystal display device
US20020180920A1 (en) Fringe field switching liquid crystal display device and method for manufacturing the same
KR19990024711A (en) Structure of liquid crystal display device and manufacturing method of the liquid crystal display device
US20060262251A1 (en) Four color liquid crystal display
JP3723914B2 (en) FFS mode liquid crystal display device and manufacturing method thereof
US20060192907A1 (en) Method of fabricating array substrate having double-layered patterns
JP4647843B2 (en) Liquid crystal display device
US6462798B1 (en) Multi-domain liquid crystal display device
US6552770B2 (en) Liquid crystal display having shield layers on both sides of spacer across signal line
US5914762A (en) Liquid crystal display device with improved transmittance and method for manufacturing same

Legal Events

Date Code Title Description
A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20031222

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20040323

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20040416

R150 Certificate of patent (=grant) or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100625

Year of fee payment: 6

LAPS Cancellation because of no payment of annual fees
R370 Written measure of declining of transfer procedure

Free format text: JAPANESE INTERMEDIATE CODE: R370