JPH10268299A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable even a reflection type display device to display a color image with quality nearly free of color mixture with sufficient lightness by making the area of a color filter smaller than that of a pixel area. SOLUTION: Inside a reverse-side substrate 2 between a couple of substrates 1 and 2, transparent pixel electrodes 3 are arrayed in matrix and active elements corresponding to those pixel electrodes 3 are provided. On the internal surface of the top-side substrate 1, on the other hand, tricolor filters 15R, 15G, and 15G of red, green, and blue are provided corresponding to the respective pixel electrodes 3 of the reverse-side substrate 2. The color filters 15R, 15G, and 15B are color filters of the respective colors having area smaller than the area of a pixel area A where pixel electrodes 3 and a counter electrode face each other, and the color filters 15R, 15G, and 15B are provided corresponding to the inside area except the peripheral edge part of the respective pixel areas A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflection type liquid crystal display device having a color filter.

[0002]

2. Description of the Related Art There are two types of liquid crystal display devices: a transmissive type that displays by using light from a backlight, and a reflective type that displays by using external light such as natural light or indoor illumination light. In a reflection type liquid crystal display device, a reflection member for reflecting external light incident from the front side of the display device is disposed on the back surface side.

In general, a liquid crystal display device has a TN (Twisted Nematic) in which liquid crystal molecules of the liquid crystal layer are twist-aligned at a predetermined twist angle between both substrates.
In the TN method, polarizing plates are arranged on the outer surface of the one substrate and the outer surface of the other substrate, respectively, with their transmission axes directed in a predetermined direction.

Further, there are various types of liquid crystal display devices such as an active matrix type and a simple matrix type. For example, an active matrix type liquid crystal display device has a pair of substrates opposed to each other with a liquid crystal layer interposed therebetween. A plurality of pixel electrodes arranged in a matrix and a plurality of active elements respectively connected to these pixel electrodes are provided on the inner surface of one of the substrates, and the plurality of pixel electrodes are opposed to the plurality of pixel electrodes on the inner surface of the other substrate. A counter electrode for forming a pixel region is provided by the portion to be formed.

Further, there are a liquid crystal display device for displaying a black-and-white image and a liquid crystal display device for displaying a color image. In general, a liquid crystal display device for displaying a color image is one of the inner surfaces of a pair of substrates. Either of them is provided with a color filter corresponding to each pixel region.

That is, in the case of a liquid crystal display device for displaying a multicolor image such as a full-color image, a plurality of colors having an area corresponding to the pixel region, for example, red, are provided on the inner surface of one of the substrates. Three color filters of green and blue are alternately arranged adjacent to each other so that the color filters of the respective colors correspond to the respective pixel regions.

[0007]

However, in a conventional liquid crystal display device having a color filter, light transmitted through the pixel region is incident on the color filter, and light in a wavelength band other than a specific wavelength band is absorbed by the color filter. Then, since only the light in the specific wavelength band is transmitted and the display is performed by the transmitted light colored to the color of the color filter, the intensity of the colored outgoing light with respect to the incident light becomes extremely weak, and a bright display cannot be obtained. Have a problem.

This problem can be alleviated to some extent by increasing the brightness of the backlight in the case of the above-mentioned transmissive display device. However, in the case of a reflective liquid crystal display device which makes use of external light for display. The intensity of external light that is incident is affected by the brightness of the surroundings, and a color filter is used until the light that enters from the front side is reflected by the reflecting member on the back side and exits to the front side. Twice, the light is greatly attenuated, and the screen becomes darker.

Moreover, in the conventional reflection type liquid crystal display device,
Since the incident light from the front surface is reflected and emitted at a reflection angle corresponding to the incident angle to the reflection member, the light enters the pixel region from a direction inclined obliquely to a direction perpendicular to the front surface and the pixel region Of the light of the specific wavelength band, which is absorbed and colored by the color filter of the specific wavelength band, the incident light transmitted through the peripheral portion of the pixel region, in particular, is adjacent when reflected by the reflection member and emitted. In the case of a liquid crystal display element having three color filters of red, green, and blue for performing color display by additive color mixture because the light is incident on a pixel area of another color, the other elements disposed in the pixel area The light in the wavelength band is absorbed by the color filter of the color No. 2, so that the light incident from the direction inclined to the periphery of the pixel region is absorbed by the two color filters and does not exit to the front surface of the display element. of In the case of a liquid crystal display device having three color filters of magenta, yellow, and cyan, which further darkens the screen and performs color display by additive color mixing, there is a problem that color mixing occurs in the display. .

The present invention provides a liquid crystal display device having a color filter, which is a high-quality liquid crystal display device having sufficient brightness and little color mixing even if it is a reflection type display device using external light for display. An object is to provide a device capable of displaying a color image.

[0011]

According to the present invention, there is provided a liquid crystal display device comprising: a pair of substrates opposed to each other; a plurality of first electrodes provided on an inner surface of one of the pair of substrates; At least one second region that forms a pixel region on the inner surface of the other substrate by a portion facing the plurality of first electrodes.
And a color filter provided on one of the inner surfaces of the pair of substrates so as to correspond to the pixel region and having a smaller area than the pixel region, and provided between the pair of substrates. A liquid crystal layer; and a reflecting member that reflects incident light transmitted through the liquid crystal layer in a direction closer to a direction perpendicular to the liquid crystal layer.

According to the liquid crystal display device of the present invention, since the area of the color filter is smaller than the area of the pixel region, only light incident on the color filter out of the light transmitted through the pixel region is absorbed by the color filter. The light in the region is absorbed and colored, and other light is transmitted as it is without being absorbed by the color filter and remains uncolored light of high luminance, and color pixels are displayed with the uncolored light and the colored light. You.

For this reason, the displayed color pixels are colored with the color of the color filter and have sufficient luminance. Therefore, according to this liquid crystal display device, the external light reflected from the front side thereof is reflected. A sufficiently bright color image can be displayed even if it is of a reflection type in which reflection is performed by a member for display.

Further, in this liquid crystal display device, since the reflecting member reflects the incident light transmitted through the liquid crystal layer in a direction which is almost perpendicular to the liquid crystal layer, the incident direction of the external light is changed to the front of the device. Even in a direction inclined obliquely to a direction perpendicular to the pixel region, the probability that incident light transmitted through the peripheral portion of the pixel region is incident on another adjacent pixel region is small, and therefore, the amount of outgoing light increases and the region becomes brighter. In addition, the occurrence of color mixing is reduced, and a high-quality color image can be displayed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, the liquid crystal display device of the present invention is configured such that the area of the color filter provided on the inner surface of one of the substrates so as to correspond to the pixel area is smaller than the area of the pixel area. A color pixel is displayed with uncolored light not passing through the color filter and light colored by the color filter, and incident light transmitted through the liquid crystal layer is directed in a direction close to perpendicular to the liquid crystal layer. By reducing the probability that incident light transmitted through the peripheral portion of the pixel region enters another adjacent pixel region by reflection, even in a reflective display device, sufficient brightness and color mixing can be achieved. It is possible to display a high-quality color image, which is hardly available.

In the liquid crystal display device of the present invention, for example, a plurality of first electrodes and an active element connected to each of the first electrodes are provided on the inner surface of one of the pair of substrates. The region where the first electrode and the second electrode provided on the inner surface of the other substrate face each other is a pixel region.

In this liquid crystal display device, it is desirable that the color filter is provided corresponding to an inner region excluding a peripheral portion of the pixel region. Even if the incident light transmitted through the peripheral portion of the pixel may be emitted to another adjacent pixel region, it does not enter a color filter of another color, so that the light is not absorbed and is not absorbed. The light is emitted to the front of the display element as colored light. Therefore, the liquid crystal display device of the present invention can provide a bright display and can surely prevent the occurrence of color mixing.

Further, when displaying a multi-color image in this liquid crystal display device, a plurality of color filters having different colors are arranged at equal intervals to each other, and these color filters are made to correspond to different pixel regions, respectively. I just need.

[0019]

1 to 4 show an embodiment of the present invention. FIG. 1 is a plan view of a part of a liquid crystal display device, and FIG.
1 is a sectional view taken along the line II-II, and FIG. 3 is a sectional view taken along the line III-III in FIG.

The liquid crystal display device of this embodiment is of an active matrix type in which a TFT (thin film transistor) is used as an active element. On the inside of 2,
Transparent pixel electrodes 3 are arranged in a matrix, and active elements (hereinafter, referred to as TFTs) 4 corresponding to the pixel electrodes 3 are provided.

In FIG. 1, the electrode (R) is a pixel electrode for displaying a red pixel, the electrode (G) is a pixel electrode for displaying a green pixel, and the electrode (B) is a blue pixel. These pixel electrodes 3 are arranged alternately in the row direction (the horizontal direction of the screen) and are arranged in the column direction (the vertical direction of the screen) to display pixels of the same color. They are alternately shifted in the row direction by about 1.5 pitches and are arranged in zigzag.

The TFT 4 is formed on the back substrate 2, a gate electrode 5, a gate insulating film 6 covering the gate electrode 5, and formed on the gate insulating film 6 so as to face the gate electrode 5. And a source electrode 8 and a drain electrode 9 formed on both sides of the i-type semiconductor film 7 via an n-type semiconductor film (not shown).

On the back substrate 2, a gate line 10 for supplying a gate signal to the TFT 4 in each row is wired along one side of each pixel electrode row.
The gate electrodes 5 of the TFTs 4 in each row are formed integrally with a gate line 10 corresponding to the row.

The gate insulating film (transparent film) 6 of the TFT 4 is formed over substantially the entire surface of the substrate 2, and the gate line 10 is covered with the gate insulating film 6 except for its terminal. .

On the gate insulating film 6, each TFT 4 of each column is arranged along one side of each pixel electrode column.
A data line 11 for supplying a data signal is connected to the data line 11, and a drain electrode 9 of the TFT 4 in each column is connected to the data line 11 corresponding to the column.

The data lines 11 are arranged in a meandering manner along each pixel electrode column (a zigzag pixel electrode column) for displaying pixels of the same color, and are arranged vertically along the side edges of the pixel electrodes 3 in each row. The horizontal wiring section connecting the wiring sections is wired in parallel with the gate line 10 between adjacent pixel electrode rows.

In this embodiment, the data line 11 is wired on the gate insulating film 6, and the drain electrodes 9 of the TFTs 4 in each column are respectively connected to the data line 1 corresponding to the column.
1, but the data line 11 is
The TFT 4 may be covered with a protective insulating film, wired thereon, and connected to the drain electrode 9 of the TFT 4 through a contact hole provided in the protective insulating film.

The pixel electrode 3 is formed on the gate insulating film 6, and the pixel electrode 3 is connected to the source electrode 9 of the corresponding TFT 4 at one side edge.

Further, on the back substrate 2, corresponding to each pixel electrode row, a capacitance forming electrode 12 opposed to each pixel electrode 3 of the row with the gate insulating film 6 interposed therebetween.
Are provided, and the capacitance forming electrode 12 and the pixel electrode 3
And the gate insulating film 6 therebetween form a compensation capacitor (storage capacitor) for compensating the fluctuation of the potential of the pixel electrode 3 during the non-selection period.

The pixel electrode 3 is a vertically long rectangular electrode having a slightly larger vertical width than its horizontal width. The capacitance forming electrode 12 is located on the opposite side of the pixel electrode 3 from the TFT connection side. The gate line 10 is formed in parallel with the gate line 10 so as to face a portion slightly offset from the edge to the inside of the pixel electrode.

The capacitance forming electrode 12 and the gate line 10 are formed of a metal film (for example, an aluminum alloy) having a low resistance and a high light reflectivity, and the data line 11 also has a low resistance and a high resistance. It is formed of a metal film having a reflectance.

On the inner surface of the back substrate 2, there is provided a transparent overcoat insulating film 13 for covering the TFT 4, the data line 11, and the peripheral portion of the pixel electrode 3, on which an alignment film 14 is formed. Have been.

On the other hand, on the inner surface of the front substrate 1, color filters 15R, 15G, and 15B of three colors of red, green, and blue are provided corresponding to the respective pixel electrodes 3 of the back substrate 2, respectively. A transparent protective film 16 is formed so as to cover the pixel electrodes 3. On the protective insulating film 16, a pixel region A is formed by portions facing the pixel electrodes 3 and facing the pixel electrodes 3. A transparent opposing electrode 17 in the form of a single film is provided, on which an alignment film 18 is formed.

The color filters 15R, 15G, 15
B is a color filter having a size smaller than the area of the pixel region A in which the pixel electrode 3 and the counter electrode 17 face each other. In this embodiment, the color filters 15 of the respective colors are used.
R, 15G, and 15B are provided so as to correspond to regions inside the pixel region A except the peripheral portion.

These color filters 15R, 15G,
15B is provided so as to face the region on the TFT connection side rather than the portion where the capacitance forming electrode 12 of the pixel electrode 3 formed in a vertically long rectangular shape faces, and therefore, the capacitance forming electrode 12 of the pixel region A is provided. The distance from the edge on the side (the upper edge in FIG. 1) to the color filters 15R, 15G, and 15B is greater than the distance from the other three edges of the pixel area A to the color filters 15R, 15G, and 15B. Is also big.

In FIG. 1, the color filter 15 is used.
Although R, 15G, and 15B are formed in a rectangular shape, the shape of these color filters 15R, 15G, and 15B is not limited to a rectangular shape, and may be a circular shape or an elliptical shape.

The front substrate 1 and the back substrate 2 are
The liquid crystal LC is joined via a frame-shaped sealing material (not shown), and is filled between the substrates 1 and 2 in a region surrounded by the sealing material.

The alignment films 14 and 18 provided on the inner surfaces of the pair of substrates 1 and 2 are each subjected to an alignment process by rubbing the film surfaces in a predetermined direction. The orientation of the molecules of the filled liquid crystal LC is regulated in the vicinity of the respective substrates 1 and 2 by the alignment film 14 of the back substrate 2 and the alignment film 18 of the front substrate 1. It is twist-oriented at a twist angle (for example, about 90 °).

Further, polarizing plates 21 and 22 are disposed on the outer surfaces of the pair of substrates 1 and 2, respectively, and these polarizing plates 21 and 22 have respective optical axes (transmission axes or absorption axes). It is provided in a state facing a predetermined direction.

That is, the liquid crystal display device of this embodiment is
The liquid crystal layer LC is of a so-called normally white mode, in which a display in a state where an electric field is not applied (a state in which liquid crystal molecules are aligned in an initial twist alignment state) is a bright display. , 22 in the direction of the transmission axis,
The incident light is directed to the front polarizer 21, the liquid crystal layer LC, and the rear polarizer 22.
And is reflected by the back side polarizing plate 22 and the liquid crystal layer L.
In the case where C and the front-side polarizing plate 21 are sequentially transmitted and emitted,
Also, when the incident light is transmitted and reflected through the front-side polarizing plate 21 and the liquid crystal layer LC and sequentially transmitted through the liquid-crystal layer LC and the front-side polarizing plate 21 and emitted, a display in a normally white mode is obtained. Is set.

Further, behind the polarizing plate 22 on the back side, a reflecting member 23 for reflecting external light entering the liquid crystal display device from the front side thereof is disposed. The reflecting member 23 reflects incident light transmitted through the liquid crystal layer in a direction closer to a direction perpendicular to the liquid crystal layer, and is provided on the micro prism sheet 24 and the back surface of the micro prism sheet 24. And a white mirror reflection film 25.

The micro-prism sheet 24 is formed by densely arranging narrow prisms of minute width continuous in one direction on the surface of a transparent plate made of glass, acrylic resin, or the like. Has a right-angled triangular cross section in which one side surface is vertical and the other side surface is an inclined surface having a predetermined inclination angle.

The width of each prism portion of the micro prism sheet 24 may be the width corresponding to one prism portion for one pixel electrode row, or one prism portion for a plurality of pixel electrode rows of two to three rows. Is preferably the corresponding width.

The reflecting member 23 is provided such that the inclined surfaces of the respective prism portions of the micro prism sheet 24 face the main incident direction of external light. In other words, the reflective liquid crystal display device that displays using external light has a screen that allows more external light to enter from a direction obliquely above the screen, that is, a direction inclined to the upper edge of the screen with respect to a direction perpendicular to the front of the device. The reflecting member 23 is used to make the length direction of each prism portion of the micro prism sheet 24 along the horizontal axis direction of the screen, and the inclined surface of the prism portion. To the upper edge of the screen.

This liquid crystal display device performs a reflection type display using external light.
Of the light (linearly polarized light) transmitted through the pixel region A and passing through the inner region except for the peripheral portion of the pixel region A, the color filter 1 corresponding to the pixel region A
5R, 15G, and 15B, and the light in the absorption wavelength range is absorbed by the color filter and colored into the color of the color filter.
Are sequentially transmitted and reflected by the reflecting member 23 in a direction approaching perpendicular to the liquid crystal layer.
2, the liquid crystal layer, and the front polarizing plate 21 to sequentially transmit the light to the front side.

Further, of the light incident on each pixel area A, the light incident on the periphery of the pixel area A, that is, the area outside the color filters 15R, 15G, 15B, does not pass through the color filters. Liquid crystal layer and back-side polarizing plate 22
Are sequentially transmitted and reflected by the reflecting member 23 in a direction approaching perpendicular to the liquid crystal layer.
2, the liquid crystal layer, and the front polarizing plate 21 to sequentially transmit the light to the front side.

The main direction of incidence of external light is the direction inclined to the upper edge of the screen with respect to the direction perpendicular to the front surface of the apparatus as described above. Since the inclined surfaces of the respective prism portions of the prism sheet 24 are provided so as to face the main incident direction of the external light, the external light incident from the main incident direction is applied to the liquid crystal layer as shown by the dashed arrow in FIG. The light can be reflected in a direction that is almost perpendicular to the light.

However, light incident on the portion of the pixel region A where the capacitance forming electrode 12 is provided is reflected by the capacitance forming electrode 12 at a reflection angle corresponding to the angle of incidence on the electrode surface. You.

According to this liquid crystal display device, since the area of the color filters 15R, 15G, 15B is smaller than the area of the pixel area A, the light transmitted through the pixel area A is incident on the color filters 15R, 15G, 15B. Only the light to be absorbed is colored by absorbing the light in the absorption wavelength range by the color filter, and the other light is transmitted as a high-luminance uncolored light without being absorbed by the color filter. Color pixels are displayed with the colored light.

FIG. 4 is a view showing a display pixel of the liquid crystal display device. The outer shape of the display pixel A 'is the same as that of the pixel area A, but its periphery is a high-luminance uncolored area (reflection member 23). B), and a central portion is any of red, green, and blue colored regions a colored with a color of a color filter, and the display pixel A ′ is a human eye. , The entire display pixel A 'appears as one color pixel colored in the color of the colored area a.

For this reason, according to the liquid crystal display device, the color pixels to be displayed are formed by the color filters 15R and 15R.
The liquid crystal display device is a pixel of a reflective type in which the pixels are colored with G and 15B and have sufficient luminance. Therefore, according to this liquid crystal display device, external light incident from the front side thereof is reflected by the reflection member 23 for display. However, a sufficiently bright color image can be displayed.

In this embodiment, the external light incident on the portion between the pixel regions A is also reflected by the reflecting member 23 or the surface of the gate line 11 and the capacitance forming electrode 12 and the data line 11 and emitted to the front side. Therefore, the portion between the pixel regions A can be brightened, and the luminance of the entire screen can be further increased.

Further, in this liquid crystal display device, since the reflecting member 23 reflects the incident light transmitted through the liquid crystal layer in a direction which is almost perpendicular to the liquid crystal layer, the incident direction of the external light is changed. Even in a direction inclined obliquely to a direction perpendicular to the front surface (a direction inclined to the upper edge side of the screen with respect to the vertical direction), other pixels adjacent to the incident light transmitted through the peripheral portion of the pixel area A are adjacent to each other. The probability of light passing through the region A and being emitted is low,
Therefore, since all the external light is not absorbed, the amount of emitted light is increased, and the occurrence of color mixing is reduced, so that a high-quality color image can be displayed.

That is, in the conventional reflection type liquid crystal display device, as described in the section [Problems to be Solved by the Invention], incident light from the front surface is reflected at a reflection angle corresponding to the incident angle to the reflection member. The light emitted from the pixel region enters the pixel region from a direction inclined obliquely to the direction perpendicular to the front surface and transmits through the peripheral portion of the pixel region, particularly, of the light colored by the color filter of the pixel region. When the incident light is reflected by the reflection member and emitted, the light enters the adjacent pixel region of another color and is absorbed by the color filter of another color in the pixel region. According to a liquid crystal display device having a color filter of three colors of red, green and blue, which performs color display by additive color mixture like a device, the light obliquely incident on the peripheral portion of the above-described pixel region has two colors. Absorbed by the filter In prayer, the number of emitted light,
A bright display element can be obtained.

Further, color display is performed by subtractive color mixture.
In a liquid crystal display device having three color filters of magenta, yellow, and cyan, light obliquely incident on the periphery of the above-described pixel region passes through the two color filters, so that color mixing occurs in display. Will occur,
According to the liquid crystal display device of the present invention, since the light obliquely incident on the peripheral portion of the pixel region described above does not pass through the two color filters, color mixing hardly occurs.

However, since the direction of the light reflected by the reflecting member 23 differs depending on the angle of incidence on the reflecting member 23, the incident light transmitted through the peripheral portion of the pixel area A is very slight. There is also light that is reflected in the oblique direction by the reflection member 23 and passes through another adjacent pixel area A and exits.

The capacitance forming electrode 1 in the pixel region A
Since the light incident on the portion provided with the second pixel 2 is reflected by the capacitance forming electrode 12 at a reflection angle corresponding to the angle of incidence on the electrode surface, other adjacent pixel regions are included in the light. There is light that passes through A and exits.

However, according to the liquid crystal display device of the above embodiment, the area of the color filters 15R, 15G, 15B is made smaller than the area of the pixel area A, and these color filters are removed except for the periphery of the pixel area A. Since light is provided corresponding to the inner region, light incident near the edge of any pixel region A is reflected without coloring.

Therefore, even if the incident light transmitted through the peripheral portion of the pixel area A may be transmitted through another adjacent pixel area A and emitted, it is emitted as uncolored light, so that the display becomes brighter and the color becomes brighter. The occurrence of mixing can be eliminated.

Furthermore, as described above, the main incident direction of the external light is the direction inclined toward the upper edge of the screen with respect to the direction perpendicular to the front surface of the device, and therefore, is transmitted through another adjacent pixel area A. Most of the emitted light is light that has passed through the vicinity of the lower edge of the pixel region A in the row above the pixel region A and entered.

In this embodiment, the color filters 15R, 15G, and 15B are formed in a vertically elongated rectangular shape.
Since the distance from the edge on the side of the pixel area A where the capacitance forming electrode 12 is provided to the color filters 15R, 15G, and 15B is increased by providing the area opposite to the area on the T connection side, the screen area is reduced. The distance between the color filters of the pixel regions A arranged in the vertical direction is large, and therefore, the incident light transmitted near the lower edge of the pixel region A in the upper row is transmitted and emitted through the pixel area A in the lower row. However, since the light does not pass through the color filters 15R, 15G, and 15B, the amount of emitted light can be further increased, and the occurrence of color mixing can be surely eliminated.

According to this liquid crystal display device, since the incident light is reflected by the reflection member 23 in a direction closer to the direction perpendicular to the liquid crystal layer, it is directed in the front direction, that is, in the direction perpendicular to the front surface of the device. , And the front luminance of the display can be improved.

In the above embodiment, the color filter 1
5R, 15G and 15B are formed on the substrate 1 on which the counter electrode 17 is provided.
15B may be formed on the substrate 2 provided with the pixel electrodes 3.

In the above embodiment, the reflection member 23 is formed on the back surface of the micro prism sheet 24 by the mirror reflection film 2.
5, the reflection member is, for example, a reflection plate whose surface is a reflection surface having the same shape as the surface of the micro prism sheet 24, or the surface of the micro prism sheet 24 on the back surface of the transparent plate. A reflection plate or the like having a reflection surface of a similar shape may be used.

Further, although the liquid crystal display device of the above embodiment is of the active matrix type, the present invention is not limited to the active matrix type, and a plurality of scanning electrodes along one direction may be formed on the inner surface of one substrate. The present invention can also be applied to a simple matrix type liquid crystal display device or the like in which a plurality of signal electrodes are provided in parallel and a plurality of signal electrodes are provided on the inner surface of the other substrate along a direction intersecting the scanning electrodes.

In this case, a color filter having an area smaller than the area of the pixel region is provided on the inner surface of one of the substrates so as to correspond to each pixel region where each scanning electrode and each signal electrode face each other. , As a reflective member,
If a device that reflects incident light transmitted through the liquid crystal layer in a direction that is close to perpendicular to the liquid crystal layer is used, similar to the above-described embodiment, the brightness is sufficient, and there is almost no color mixing. A high-quality color image can be displayed.

[0067]

According to the liquid crystal display device of the present invention, since the area of the color filter is smaller than the area of the pixel region, only the light incident on the color filter out of the light transmitted through the pixel region is colored. The light in the absorption wavelength range is absorbed by the filter to be colored, and the other light is transmitted as it is as a high-luminance uncolored light without being absorbed by the color filter. Color pixels are displayed.

For this reason, the displayed color pixels are colored with the color of the color filter and have sufficient luminance. Therefore, according to this liquid crystal display device, external light incident from the front side thereof is reflected. A sufficiently bright color image can be displayed even if it is of a reflection type in which reflection is performed by a member for display.

Further, in this liquid crystal display device, since the reflecting member reflects the incident light transmitted through the liquid crystal layer in a direction which is almost perpendicular to the liquid crystal layer, the incident direction of the external light is changed to the front of the device. Even if the direction is obliquely inclined with respect to the direction perpendicular to the direction, the probability that incident light transmitted through the peripheral portion of the pixel region is transmitted through another adjacent pixel region and emitted is small, and therefore, the display is further improved. It is possible to display a high-quality color image with increased brightness and less occurrence of color mixing.

In the liquid crystal display of the present invention,
If the color filter is provided corresponding to the inner region except for the peripheral portion of the pixel region, incident light transmitted through the peripheral portion of the pixel region may be transmitted through another adjacent pixel region and emitted. However, since the light is uncolored light, the display becomes brighter and the occurrence of color mixing can be more reliably eliminated.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view taken along the line III-III of FIG. 1;

FIG. 4 is a diagram showing display pixels of the liquid crystal display device.

[Explanation of symbols]

 1, 2 ... substrate 3 ... pixel electrode 4 ... TFT (active element) 15R, 15G, 15B ... color filter 17 ... counter electrode A ... pixel area A '... display pixel a ... colored area b ... uncolored area

Claims (4)

[Claims] A pair of first and second substrates provided on an inner surface of one of the pair of substrates;
And at least one second electrode that forms a pixel region on the inner surface of the other substrate with a portion facing the plurality of first electrodes, and the pixel on one of the inner surfaces of the pair of substrates. A color filter having an area smaller than the area of the pixel region, provided in correspondence with the region, a liquid crystal layer provided between the pair of substrates, and incident light transmitted through the liquid crystal layer is applied to the liquid crystal layer. A reflection member that reflects light in a direction that is closer to vertical. 2. An inner surface of one of a pair of substrates,
A region where a plurality of first electrodes and an active element connected to each of the first electrodes are provided, and the first electrode and a second electrode provided on the inner surface of the other substrate face each other. 2. The liquid crystal display device according to claim 1, wherein? 3. The liquid crystal display device according to claim 1, wherein the color filter is provided so as to correspond to a region inside the pixel region except for a peripheral portion. 4. The liquid crystal display device according to claim 1, wherein a plurality of color filters having different colors are arranged at equal intervals from each other, and these color filters correspond to different pixel regions, respectively. .