JP2001272668A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display device which is bright and is capable of displaying a good quality color image without white stripes appearing on a screen as a liquid crystal display device reflectively displaying using external light. SOLUTION: White stripes caused by the light reflected by gate lines 11, data lines 12, and compensating capacitance electrodes 13 are eliminated by arranging a light shielding film 18 covering the gate lines 11 and data lines 12 provided on the inner surfaces of a front substrate 2 and a rear substrate of the liquid crystal display device (1) respectively and the compensating capacitance electrodes 13, and also the liquid crystal display device is arranged so as to display a bright color image by forming color filters 17R, 17G and 17B provided on the inner surface of the front substrate 2 with a gap, respectively, across at least both sides edges of an effective pixel area restricted by the light shielding film 18, making colored light exit from the color filter corresponding area in the effective pixel area, and making non-colored light exit from the unfiltered area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a liquid crystal display device for performing reflection display using external light.

[0002]

2. Description of the Related Art As a liquid crystal display device, there is a reflection type liquid crystal display device which performs a reflection display using external light (natural light, indoor light, etc.) which is light of the use environment. And a reflecting means disposed behind the liquid crystal display element and reflecting light incident on the liquid crystal display element from the front side that is a display observation side and emitted to the rear side of the liquid crystal display element toward the liquid crystal display element. And

The liquid crystal display device is required to display a color image such as a full-color image. The liquid crystal display device for displaying the color image is an active device using a thin film transistor (hereinafter, referred to as a TFT) as an active device. A matrix liquid crystal display device is used.

This active matrix liquid crystal display element comprises a plurality of transparent pixel electrodes arranged in a matrix in a row direction and a column direction on an inner surface of a rear substrate among a pair of transparent substrates facing each other with a liquid crystal layer interposed therebetween. A plurality of TFTs respectively connected to the plurality of pixel electrodes; a plurality of gate lines wired along one side of each pixel electrode row to supply a gate signal to the TFT; And a plurality of data lines which are wired along one side of the pixel electrode and supply data signals to the TFTs, and which face the edge of the pixel electrode of each pixel electrode row via an insulating film (gate insulating film of the TFT). A plurality of compensation capacitance electrodes forming compensation capacitances are provided between the pixel electrodes, and a single film transparent counter electrode facing the plurality of pixel electrodes is provided on the inner surface of the front substrate. And it has a configuration.

The gate line, the drain line and the compensation capacitance electrode are made of a low-resistance metal film such as an aluminum alloy. Further, the compensation capacitance electrode is extended to a region between a line portion facing one end edge portion of the pixel electrode and a pixel electrode adjacent in the row direction from the line portion, and the adjacent pixel electrode is formed at both side edges. Are formed in a shape having a side edge portion and an extension portion facing each other.

In many cases, the active matrix liquid crystal display element has liquid crystal molecules of the liquid crystal layer twist-oriented at a predetermined twist angle between a pair of substrates, and a polarizing plate is provided on each of the outer surfaces of the pair of substrates. TN (twisted nematic) type liquid crystal display elements are employed.

The active matrix liquid crystal display device includes a device for displaying a black-and-white image and a device for displaying a color image such as a full-color image. The liquid crystal display device for displaying a color image is provided on the inner surface of the front substrate. , A plurality of color filters opposed to the plurality of pixel electrodes are provided.

The color filters of the plurality of colors alternately cover the pixel electrodes so as to cover the pixel electrodes in order to emit colored light from the entirety of the plurality of pixel regions in which the plurality of pixel electrodes and the counter electrode face each other. It is provided continuously.

However, in a reflection type liquid crystal display device using a liquid crystal display element that emits colored light from the entire pixel region, the intensity of the colored light emitted from each pixel region of the liquid crystal display device is low, and a bright color image can be obtained. There is a problem that can not be obtained.

This is because, in the reflection type liquid crystal display device, external light incident on the liquid crystal display element from the front is transmitted through the liquid crystal display element, reflected by the reflection means behind the liquid crystal display element, and transmitted through the liquid crystal display element again. Then, in the process of being emitted to the front surface, the light is twice absorbed by the color filter, and is emitted as colored light whose intensity is greatly reduced.

For this reason, recently, a liquid crystal display element in which a plurality of color filters of a plurality of colors are formed in areas smaller than the area of the pixel electrode is used, and the plurality of pixel electrodes and the counter electrode of the liquid crystal display element face each other. Out of a plurality of pixel regions, a region corresponding to a color filter emits colored light colored to the color of the color filter, and a non-filter region that does not correspond to the color filter emits non-colored light that is not absorbed by the color filter. There has been proposed a reflective liquid crystal display device that emits light.

According to this liquid crystal display device, the color pixels of each color displayed by the light respectively emitted from the plurality of pixel regions of the liquid crystal display element are colored with the color of the color filter corresponding to the pixel region, and Pixels whose brightness is raised by non-colored light (white light) which does not decrease in intensity due to absorption by the color filter, and therefore, a bright color image can be displayed.

[0013]

However, a conventional reflection type liquid crystal display device using a liquid crystal display element in which a color filter is formed to have an area smaller than the area of a pixel electrode is provided between the pixel regions of the liquid crystal display element. Non-colored light (white light) is emitted from a region (hereinafter, referred to as an inter-pixel region), and vertical and horizontal white stripes are seen on a screen, which causes a problem of deteriorating display quality.

That is, in a liquid crystal display element in which colored light is emitted from the entire pixel area, a plurality of color filters of colors are alternately and continuously arranged. Therefore, white stripes are not seen on the screen.

On the other hand, in a liquid crystal display device in which a color filter is formed to have an area smaller than the area of a pixel electrode, since there is no color filter in the inter-pixel region, the intensity of the absorption by the color filter is reduced from the inter-pixel region. Non-colored light without emission is emitted.

Further, the transmittance of light in the region corresponding to the color filter in the pixel region and the light transmittance in the non-filter region not corresponding to the color filter depends on the orientation of the liquid crystal molecules due to the electric field applied between the pixel electrode and the counter electrode. Although it changes according to the change of the state, the electric field hardly acts on the inter-pixel region, so that the transmittance of the inter-pixel region hardly changes.

In the inter-pixel region, a gate line and a data line formed of a low-resistance metal film provided on the inner surface of the rear substrate face a part of the compensation capacitance electrode. External light incident on the inter-pixel region is reflected at a high reflectance on the inner surface of the rear substrate by one of the gate line and the data line and the compensation capacitor electrode, and the reflected light is provided on the outer surface of the rear substrate. Without passing through the rear polarizing plate, that is, the absorption by the rear polarizing plate is emitted from the inter-pixel region to the front without lowering the intensity, and white stripes due to the emitted light are visible.

The intensity of light reflected by the gate line and data line and the compensation capacitance electrode varies depending on the intensity of external light incident from the front surface, but is considerably dazzling in an environment where strong external light of about 30,000 lux or more is incident. White stripes are visible.

It is an object of the present invention to provide a liquid crystal display device which performs reflection display using external light and which can display a bright color image of good quality without white stripes on the screen. It is intended for.

[0020]

According to the present invention, a plurality of pixel electrodes arranged in a matrix in a row direction and a column direction on an inner surface of a rear substrate among a pair of front and rear substrates sandwiching a liquid crystal layer. A plurality of TFTs respectively connected to the plurality of pixel electrodes, and a plurality of gate lines which are wired along one side of each pixel electrode row and are made of a low-resistance metal film for supplying a gate signal to the TFTs. A plurality of data lines, which are wired along one side of each pixel electrode column and are made of a low-resistance metal film for supplying a data signal to the TFT, and are insulated at one edge of a pixel electrode of each pixel electrode row. It extends to the region between the line portion facing the film and the pixel electrode adjacent to the line portion in the row direction from the line portion, and at both side edges, the side edge of the adjacent pixel electrode is interposed via the insulating film. A plurality of compensating capacitance electrodes made of a low-resistance metal film having an extended portion to be provided, an inner surface of the front substrate, a counter electrode facing the plurality of pixel electrodes, and a plurality of counter electrodes respectively facing the plurality of pixel electrodes. A liquid crystal display element in which a color filter of a color is provided, and a polarizing plate is provided on each of the outer surfaces of the pair of substrates, and the liquid crystal display element is disposed behind the liquid crystal display element, and the liquid crystal display element is a display side of display. A reflecting means for reflecting light incident on the front surface and emitted to the rear surface of the liquid crystal display element toward the liquid crystal display element, wherein the plurality of gates are provided on an inner surface of a front substrate of the liquid crystal display element. A light-shielding film that covers lines and data lines and the compensation capacitance electrode is provided, and the light-shielding film is formed of a plurality of pixel regions in which the plurality of pixel electrodes and the counter electrode face each other. The regions except the corresponding region are each an effective pixel region, and the color filters of the plurality of colors provided on the inner surface of the front substrate of the liquid crystal display element are each provided with at least both side edges of the effective pixel region. Formed with a gap between them,
Colored light is emitted from a region of the effective pixel region corresponding to the color filter, and non-colored light is emitted from a non-filter region not corresponding to the color filter.

According to the liquid crystal display device of the present invention, the color filters of a plurality of colors provided on the inner surface of the front substrate of the liquid crystal display element are each regulated by the light shielding film provided on the inner surface of the front substrate. A gap is formed between at least both side edges of the pixel region, and colored light is emitted from a region of the effective pixel region corresponding to the color filter. Since the colored light is emitted, the color pixels of each color displayed by the light emitted from each of the plurality of effective pixel regions of the liquid crystal display element are colored to the color of the color filter corresponding to the effective pixel region. In addition, the brightness of the pixel is raised by non-colored light (white light) whose intensity does not decrease due to absorption by the color filter. Color image can be displayed.

Further, according to this liquid crystal display device, the plurality of gate lines and data lines provided on the inner surface of the rear substrate of the liquid crystal display element and the compensation capacitance electrode are provided on the light shielding film provided on the inner surface of the front substrate. Because it is covered by
Reflection of light by the gate line, the data line and the compensation capacitance electrode on the inner surface of the rear substrate is eliminated, and a good quality color image without white stripes on the screen can be displayed.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, a liquid crystal display device according to the present invention includes a plurality of gate lines and data lines provided on the inner surface of a rear substrate and a compensating capacitance electrode on the inner surface of a front substrate of a liquid crystal display element. A light-shielding film for covering is provided, and a plurality of color filters provided on the inner surface of the front substrate are formed with a gap between at least both side edges of an effective pixel area regulated by the light-shielding film. Accordingly, it is possible to display a color image of good quality which is bright and does not show white stripes on the screen.

In the liquid crystal display device according to the present invention, it is preferable that the color filters are formed with a gap between both side edges of the effective pixel region, and that the color filters are formed in such a manner. Non-colored light is emitted around the colored light emitted from the area corresponding to the color filter in the effective pixel area, and the brightness of the color pixel can be raised more effectively.

Further, in the liquid crystal display device of the present invention,
The color filter may be formed in a shape in which one end side is extended in a direction of an end portion where a line portion of the compensation capacitance electrode of the pixel electrode is opposed, and the extension may be overlapped with a light shielding film. Thereby, even if one side edge of the line portion of the compensation capacitance electrode protrudes outside the light shielding film due to an alignment error of the pair of substrates when manufacturing the liquid crystal display element, the liquid crystal display element has a front surface. From the light reflected by the protruding portion of the line portion of the compensation capacitance electrode on the inner surface of the rear substrate and emitted to the front surface as colored light,
Light reflected by the protruding portion of the line portion of the compensation capacitance electrode is made inconspicuous, and display quality can be maintained.

[0026]

1 to 3 show a first embodiment of the present invention. FIG. 1 is a front view of a part of a liquid crystal display device, and FIG. 2 is an enlarged sectional view taken along line II-II of FIG. , FIG. 3 is III-I of FIG.
It is an expanded sectional view which follows an II line.

As shown in FIGS. 2 and 3, the liquid crystal display device of this embodiment has an active matrix liquid crystal display device 1 for displaying a color image, and is disposed behind the liquid crystal display device 1. A reflecting means 23 for reflecting light incident on the liquid crystal display element 1 from the front side, which is the display observation side, and emitted toward the liquid crystal display element 1;
And

The liquid crystal display element 1 uses a TFT as an active element. As shown in FIGS.
A plurality of transparent pixel electrodes 4 arranged in a matrix in the row direction and the column direction on the inner surface of the rear substrate 3 among the pair of front and rear transparent substrates 2 and 3 opposed to each other with 0 4, a plurality of TFTs 5 respectively connected to
A plurality of gate lines 11 for supplying gate signals to the TFTs 5 in each row, a plurality of data lines 12 for supplying data signals to the TFTs 5 in each column, and a plurality of pixels forming a compensation capacitance between the pixel electrodes 4. Compensation capacitance electrode 1
3 are provided. The gate line 11, the drain line 12, and the compensation capacitance electrode 13 are made of a low-resistance metal film such as an aluminum alloy.

As shown in FIG. 1, the TFT 5 includes a gate electrode 6 formed on the inner surface of the rear substrate 3, a gate insulating film 7 covering the gate electrode 6,
And a source electrode formed on both sides of the i-type semiconductor film 8 with an n-type semiconductor film (not shown) interposed therebetween. 9 and a drain electrode 10.

The gate line 11 is wired on the inner surface of the rear substrate 3 along one side of each pixel electrode row, and the gate electrode 6 of the TFT 5 in each row is connected to the gate line corresponding to that row. 11 are integrally formed.

The gate insulating film (transparent film) 7 of the TFT 5 is formed over substantially the entire surface of the rear substrate 3, and the gate line 11 is covered with the gate insulating film 7 except for its terminal. Have been done.

The data line 12 is wired on the gate insulating film 7 along one side of each pixel electrode column, and the drain electrode 1 of the TFT 5 in each column is provided.
0 is connected to the data line 12 corresponding to the column.

In this embodiment, the data line 12
Are formed on the gate insulating film 7, and the drain electrodes 10 of the TFTs 5 in each column are formed integrally with the data lines 12 corresponding to the respective columns.
Means that the TFT 5 is covered with an interlayer insulating film and wired thereon, and the TFT 5 is inserted into a contact hole provided in the interlayer insulating film.
5 may be connected to the drain electrode 10.

The pixel electrodes 4 are formed on the gate insulating film 7, and the TFTs corresponding to the pixel electrodes 4 are provided at one side edge of the pixel electrodes 4, respectively.
5 source electrodes 9 are connected.

The compensating capacitance electrode 13 is formed on the inner surface of the rear substrate 3 so as to correspond to each of the pixel electrode rows. The gate insulating film 7 therebetween forms a compensation capacitance for compensating the fluctuation of the potential of the pixel electrode 4 during the non-selection period.

The compensation capacitance electrode 13 is connected to the pixel electrode 4
A line portion 13a opposed to one edge of the pixel electrode, and a region extending from the line portion 13a to a region between the pixel electrodes 4 and 4 adjacent to each other in the row direction with the data line 12 interposed therebetween. The compensation capacitance is formed at three edges, one end edge and both side edges of each pixel electrode 4. ing.

The line portion 1 of the compensation capacitance electrode 13
3a is formed substantially parallel to the gate line 11 so as to face an edge of the pixel electrode 4 opposite to the TFT connection side, and an extension 13b is provided at an end of the pixel electrode 4 on the TFT connection side. It is formed over a length that reaches close.

Although not shown in FIG. 1, the inner surface of the rear substrate 3 has the TF as shown in FIGS.
An overcoat insulating film 14 that covers the T5 and the data lines 12 is provided, and an alignment film 15 is formed over the overcoat insulating film 14 over the entire arrangement region of the pixel electrodes 4.

On the other hand, on the inner surface of the front substrate 2, a transparent opposing electrode 16 in the form of a single film facing the plurality of pixel electrodes 4 is provided.
A plurality of colors opposed to the plurality of pixel electrodes 4, for example, three-color filters 17R, 17G of red, green, and blue, respectively.
17B, a light-shielding film 18 that covers the plurality of gate lines 11 and data lines 12, and the line portions 13a and the extension portions 13b of the compensation capacitance electrode 13 is provided, and an alignment film 20 is formed on the innermost surface thereof. In FIG. 1, in order to easily distinguish the light shielding film 18,
The shaded portions are shaded in parallel.

In this embodiment, the color filter 17
R, 17G, 17B and a light-shielding film 18 are formed on the inner surface of the front substrate 2, and the counter electrode 16 is provided thereon.
An alignment film 19 is formed on the counter electrode 16.

The light-shielding film 18 is formed of, for example, a dark-colored metal film such as chromium in a lattice shape having openings in regions opposed to the plurality of pixel electrodes, and a plurality of horizontal line portions along the row direction. Respectively cover the gate line 11 and the line portion 13a of the compensation capacitance electrode 13,
A plurality of vertical line portions along the column direction cover the data line 12 and the extension 13b of the compensation capacitance electrode 13, respectively.

Each horizontal line portion covering the gate line 11 of the light-shielding film 18 and the line portion 13a of the compensation capacitance electrode 13 corresponds to one end edge of one of the pixel electrodes 4 adjacent in the column direction with the gate line 11 interposed therebetween. Line section 13 of compensation capacitance electrode 13
a is formed to have a width that covers a region slightly overlapping the other end edge of the other pixel electrode 4 from the entire opposing region.
2 and the vertical line portion covering the extension 13b of the compensation capacitance electrode 13
The width of the compensation capacitor electrode 13 is formed to cover the entire extension 13b.

For this reason, in the liquid crystal display element 1, of the plurality of pixel regions where the plurality of pixel electrodes 4 and the counter electrode 16 face each other, a region other than the region corresponding to the light shielding film 18 (the region of the light shielding film 18) Each of the areas corresponding to the plurality of openings is an effective pixel area through which light is actually transmitted.

The three color filters 17R, 17G, and 17B of red, green, and blue are respectively provided with the light-shielding film 1.
8 are formed with a gap between both side edges of the effective pixel region and both end edges thereof. Therefore, in the liquid crystal display device 1, the color of the plurality of effective pixel regions Filters 17R, 17G, 17B
The colored light is emitted from the area corresponding to the color filter 17 and the non-colored light is emitted from the non-filter area not corresponding to the color filters 17R, 17G, and 17B.

In this embodiment, in order to improve the color balance of red, green and blue display, a red color filter 39 is used.
The area of R is approximately 90% of the area of the effective pixel region, the area of the green color filter 39G is approximately 70% of the area of the effective pixel region, and the area of the blue color filter 39B is approximately the area of the effective pixel region. 85%.

The pair of substrates 2 and 3 are joined at their peripheral edges via a frame-shaped sealing material (not shown), and a liquid crystal is formed between the substrates 2 and 3 in a region surrounded by the sealing material. A layer 20 is provided.

The liquid crystal display element 1 is of a TN type, and the liquid crystal molecules of the liquid crystal layer 20 have a predetermined twist angle (for example, approximately 90 °) between the pair of substrates 2 and 3.
), And polarizing plates 21 and 22 are provided on the outer surfaces of the pair of substrates 2 and 3 with their transmission axes directed in predetermined directions.

The liquid crystal display element 1 has the lowest transmittance when the liquid crystal molecules are in the initial (non-electric field state) alignment state, but is in the normally black mode even when the liquid crystal molecules are in the initial alignment state. May be a normally white mode having the highest transmittance.

The liquid crystal display device of this embodiment is a reflection type liquid crystal display device which always performs a reflection display using external light, and a reflection means 23 disposed behind the liquid crystal display element 1 is provided with a scattering reflection. It consists of a board.

This liquid crystal display device comprises the liquid crystal display element 1
The three color filters 17R, 17G, and 17B of red, green, and blue provided on the inner surface of the front substrate 2 are respectively smaller than the effective pixel area regulated by the light-shielding film 18 provided on the inner surface of the front substrate 2. Due to the small size, the color filters 17R, 17G, 1
7B, the color filters 17R,
17G and 17B absorb the wavelength light in the absorption wavelength band and emit colored light colored to the color filters 17R, 17G and 17B.
From the unfiltered region that does not correspond to R, 17G, 17B,
Non-colored light which is not absorbed by the color filters 17R, 17G, 17B is emitted.

To the human eye observing the display of the liquid crystal display device, the colored light emitted from the color filter corresponding area of the effective pixel area and the uncolored light emitted from the non-filter area appear to be mixed.

Therefore, the red, green, and blue color pixels displayed by the light emitted from the plurality of effective pixel regions of the liquid crystal display element 1 respectively correspond to the color filters 17R, 17G, and 17G corresponding to the effective pixel regions. The pixel is colored 17B and its brightness is raised by non-colored light (white light) whose intensity does not decrease due to absorption by the color filter.

In this embodiment, since the color filters 17R, 17G, 17B are formed with a gap between both side edges of the effective pixel area, the color filters 17R, 17G, 17B are formed. The non-colored light is emitted by surrounding the colored light emitted from the color filter corresponding region, and the brightness of the color pixel can be raised more effectively.

The intensity of the colored light and the uncolored light emitted from the color filter corresponding region and the non-filter region of the plurality of effective pixel regions is equal to the electric field applied between the pixel electrode 4 and the counter electrode 16. Changes in the alignment state of the liquid crystal molecules caused by the change in the brightness of the red, green, and blue color pixels displayed by the light emitted from each effective pixel area. The image is displayed.

Therefore, this liquid crystal display device performs reflection display using external light, but can display a sufficiently bright color image.

Moreover, this liquid crystal display device has a plurality of gate lines 11 and a plurality of data lines 12 provided on the inner surface of the rear substrate 3 on the inner surface of the front substrate 2 of the liquid crystal display element 1 and a line portion of the compensation capacitance electrode 13. 13a and extension 13b
Since the light-shielding film 18 is provided to cover the liquid crystal display element 1, external light incident from the front surface of the liquid crystal display element 1 enters an inter-pixel region between the effective pixel regions, and the light is transmitted to the gate line 11 on the inner surface of the rear substrate 3. And data line 12 and compensation capacitor electrode 1
The light is not reflected by 3 and emitted from the inter-pixel region to the front.

Therefore, according to this liquid crystal display device, reflection of external light by the gate line 11 and the data line 12 and the compensation capacitor electrode 13 is eliminated, and a color image of good quality without white stripes on the screen is obtained. Can be displayed.

FIGS. 4 and 5 show a second embodiment of the present invention. FIG. 4 is a front view of a part of a liquid crystal display device.
FIG. 5 is an enlarged sectional view taken along line VV of FIG.

In the liquid crystal display device of this embodiment, one end of each of the red, green and blue color filters 17R, 17G and 17B provided on the inner surface of the front substrate of the liquid crystal display element 1 is compensated by the pixel electrode 4. The capacitor electrode 13 is formed in a shape extending in the direction of the end portion where the line portion 13a faces, and the extension portion is overlapped with the horizontal line portion of the light shielding film 18. The other configuration is the same as that of the first embodiment described above. Same as the example.

In this embodiment, the uncolored light passes through the color filter 17 in the area around the effective pixel area.
The light is emitted from the regions on both sides and the other end of R, 17G, and 17B. In this embodiment as well, the brightness of the color pixels displayed by the light emitted from the effective pixel region can be effectively raised.

In this embodiment, the color filter 17
R, 17G, and 17B are extended at one end to form the light shielding film 1
8, one side edge of the line portion 13 a of the compensation capacitor electrode 13 is formed by the alignment error between the pair of substrates 2 and 3 when the liquid crystal display element 1 is manufactured. Even if it protrudes to the outside, it is incident on the liquid crystal display element 1 from its front surface, and the light reflected by the protruding portion of the line portion 13a of the compensation capacitor electrode 13 on the inner surface of the rear substrate 3 and emitted to the front surface is colored light, Light reflected by the protruding portion of the line portion 13a of the compensation capacitance electrode 13 is made inconspicuous, and display quality can be maintained.

That is, if one side edge of the line portion 13 a of the compensation capacitance electrode 13 protrudes outside the light-shielding film 18, the line of the compensation capacitance electrode 13 in the effective pixel area of the liquid crystal display element 1 is formed. The light that has entered the region corresponding to the protruding portion of the portion 13a is reflected by the protruding portion of the line portion 13a, and the reflected light is emitted to the front without passing through the rear polarizing plate 22.

For this reason, even if the change of the alignment state due to the applied electric field of the liquid crystal molecules in the effective pixel region is uniform, it corresponds to the protruding portion of the line portion 13a of the compensation capacitance electrode 13 in the effective pixel region. The region emits light that is stronger than the other region of the effective pixel region, that is, the region where the incident light is transmitted through the rear polarizer 22 and reflected by the reflection unit 23.

Therefore, if the region corresponding to the protruding portion of the line portion 13a of the compensation capacitance electrode 13 in the effective pixel region is a non-filter region, high intensity non-colored light is emitted from this region, and the contrast increases. Lower.

However, in this embodiment, one end of each of the color filters 17R, 17G, and 17B is extended and overlapped on the horizontal line of the light-shielding film 18, so that the compensation capacitance electrode 13 in the effective pixel region is not affected. The light emitted from the region corresponding to the protruding portion of the line portion 13a is colored light in which wavelength light in the absorption wavelength band is absorbed by the color filters 17R, 17G, and 17B. The reflected light by the protruding portion 13a is made inconspicuous, the decrease in contrast is reduced, and the display quality can be maintained.

In the second embodiment, one end of each of the color filters 17R, 17G, and 17B is extended and overlapped on the horizontal line of the light shielding film 18.
7R, 17G, and 17B may be formed by extending both ends thereof, and both extensions may be overlapped with the upper and lower horizontal lines of the effective pixel area of the light-shielding film 18, respectively.
The color filters 17R, 17G, and 17B may be formed continuously over a plurality of effective pixels arranged in the column direction.

That is, the color filters 17R, 1
7G and 17B may be formed with a gap between at least both side edges of the effective pixel area. By forming the color filters 17R, 17G and 17B in this way, the effective pixel area can be formed. By emitting colored light from the color filter corresponding area and emitting non-colored light from the non-filter area, a bright color image can be displayed.

The liquid crystal display devices of the first and second embodiments always perform a reflective display utilizing external light.
A reflection unit having a reflection function and an emission function of illumination light is arranged, and a reflection display is performed in an environment where external light of sufficient brightness is obtained, and when the brightness of the external light is insufficient, the reflection unit is used. The present invention can also be applied to a reflection / transmission type liquid crystal display device which performs transmission display by emitting illumination light.

[0069]

According to the liquid crystal display device of the present invention, a light shielding film for covering a plurality of gate lines and data lines provided on the inner surface of a rear substrate and a compensation capacitance electrode is provided on the inner surface of the front substrate of the liquid crystal display element. Since a plurality of color filters provided on the inner surface of the front substrate are formed with a gap between at least both side edges of the effective pixel region regulated by the light shielding film, external light is Although reflection display is used, it is possible to display a color image of good quality that is bright and has no visible white stripes on the screen.

In the liquid crystal display device according to the present invention, it is preferable that the color filters are formed with gaps between both side edges of the effective pixel region, and by doing so, Non-colored light is emitted around the colored light emitted from the area corresponding to the color filter in the effective pixel area, and the brightness of the color pixel can be raised more effectively.

In the liquid crystal display of the present invention,
The color filter may be formed in a shape in which one end side is extended in a direction of an end portion where a line portion of the compensation capacitance electrode of the pixel electrode is opposed, and the extension may be overlapped with a light shielding film. Thereby, even if one side edge of the line portion of the compensation capacitance electrode protrudes outside the light shielding film due to an alignment error of the pair of substrates when manufacturing the liquid crystal display element, the liquid crystal display element has a front surface. From the light reflected by the protruding portion of the line portion of the compensation capacitance electrode on the inner surface of the rear substrate and emitted to the front surface as colored light,
Light reflected by the protruding portion of the line portion of the compensation capacitance electrode is made inconspicuous, and display quality can be maintained.

[Brief description of the drawings]

FIG. 1 is a front view of a part of a liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along the line II-II of FIG.

FIG. 3 is an enlarged sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a front view of a part of a liquid crystal display device according to a second embodiment of the present invention.

FIG. 5 is an enlarged sectional view taken along line VV of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display element 2, 3 ... Substrate 4 ... Pixel electrode 5 ... TFT 11 ... Gate line 12 ... Data line 13 ... Compensation capacitance electrode 13a ... Line part 13b ... Extension part 16 ... Counter electrode 17R, 17G, 17B ... Color filter 18 light-shielding films 21, 22 polarizing plates 23 reflecting means

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09F 9/30 349 G09F 9/30 349C 349D G02F 1/136 500 F term (Reference) 2H091 FA02Y FA08X FA08Z FA14Z FA35Y GA03 GA13 LA16 LA18 2H092 GA24 GA32 HA04 JA24 JA34 JA37 JA41 JB22 JB31 JB52 JB64 KA18 KB04 NA01 NA02 NA28 PA08 PA09 PA12 5C094 AA02 AA08 BA03 BA43 CA19 DA09 EA04 ED02 ED11 ED15 HA08

Claims (3)

[Claims] A plurality of pixel electrodes arranged in a matrix in a row direction and a column direction on an inner surface of a rear substrate of a pair of front and rear substrates sandwiching a liquid crystal layer; A plurality of connected thin film transistors;
A plurality of gate lines made of a low-resistance metal film for supplying a gate signal to the thin film transistor, each of which is wired along one side of each pixel electrode row, and wired along one side of each pixel electrode column, A plurality of data lines made of a low-resistance metal film for supplying a data signal to the thin film transistor, and a line portion facing one end edge of a pixel electrode of each pixel electrode row via an insulating film and a row direction from the line portion. A plurality of compensating capacitance electrodes formed of a low-resistance metal film having extensions extending to a region between adjacent pixel electrodes and having extension portions opposed to side edges of the adjacent pixel electrodes via the insulating film at both side edges; A counter electrode facing the plurality of pixel electrodes, and a plurality of color filters respectively facing the plurality of pixel electrodes are provided on an inner surface of the front substrate. A liquid crystal display element having a polarizing plate provided on the outer surface of each of the pair of substrates; and a liquid crystal display element disposed behind the liquid crystal display element. A liquid crystal display device comprising: reflection means for reflecting light emitted to the back surface of the element toward the liquid crystal display element, wherein the plurality of gate lines and data lines and the compensation are provided on an inner surface of a front substrate of the liquid crystal display element. A light-shielding film that covers the capacitor electrode is provided, and among a plurality of pixel regions in which the plurality of pixel electrodes and the counter electrode face each other, regions other than a region corresponding to the light-shielding film are each an effective pixel region. The plurality of color filters provided on the inner surface of the front substrate of the liquid crystal display element are each provided with a gap between at least both side edges of the effective pixel region. A liquid crystal display, wherein colored light is emitted from a region of the effective pixel region corresponding to the color filter, and non-colored light is emitted from a non-filter region not corresponding to the color filter. apparatus. 2. The liquid crystal display device according to claim 1, wherein the color filters are formed with a gap between both side edges and both end edges of the effective pixel area. 3. The color filter is formed in a shape in which one end side is extended in the direction of the end portion where the line portion of the compensation capacitor electrode of the pixel electrode is opposed, and the extension portion overlaps the light shielding film. The liquid crystal display device according to claim 1, wherein: