JP2001281653A - Liquid crystal device and electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a semitransmissive reflecting color liquid crystal device, provided with a delta arrayed color filter and having high display quality and a bright image. SOLUTION: The liquid crystal display device 1 comprises a liquid crystal held between a pair of substrates, the delta arrayed color filter layer 14 and a semitransmissive reflecting layer 15 respectively arranged on a color filter substrate 16 and a backlight 10 arranged on the outside of the substrate 16. Scanning lines 4 are arranged on the upper side of the semitransmissive reflecting layer 15 on the color filter substrate 16. Pixel electrodes 11r, 11g, 11b are arranged on an element substrate 12. The liquid crystal is driven with these scanning lines 4 and the pixel electrodes. Furthermore, windows 17 for transmitting emitted light from the backlight 10 are formed on the semitransmissive reflecting layer 15 corresponding to the respective pixel regions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal device and an electronic apparatus, and more particularly to a transflective color liquid crystal device.

[0002]

2. Description of the Related Art Reflection type liquid crystal devices have low power consumption because they do not have a light source such as a backlight, and have been frequently used in various portable devices and display units attached to devices. However, since the display is made visible by using external light such as natural light or illumination light, there is a problem that it is difficult to read the display in a dark place. Therefore, there has been proposed a liquid crystal device in which external light is used in a bright place similarly to a normal reflective liquid crystal device, but in a dark place, the display can be visually recognized by an internal light source. In other words, this liquid crystal device employs a display system that has both a reflective type and a transmissive type, and reduces power consumption by switching between the reflective type and the transmissive type according to the surrounding brightness. In addition, a clear display can be performed even when the surroundings are dark. Hereinafter, this type of liquid crystal device is referred to as a “semi-transmissive reflective liquid crystal device” in this specification.

A reflection type liquid crystal device includes a liquid crystal panel having a pair of substrates with an external reflection plate attached to the outer surface, a substrate with a reflection layer formed on one substrate, and a pixel electrode itself for driving liquid crystal. There is a type formed of a metal film having a high reflectivity and also using a pixel electrode as a reflection layer.
When this type of reflective liquid crystal device is changed to a transflective type, for example, when a reflective liquid crystal device having an external reflector is made to be a transflective type, a conventional reflective plate having only a reflective function is used. There has been proposed a configuration in which a “semi-transmissive reflector” having both a light transmitting function and a reflecting function is used. However, in this configuration, since the transparent substrate is interposed between the liquid crystal layer and the semi-transmissive reflection plate, there is a problem that double reflection, display bleeding, and the like occur.

Further, with the development of portable equipment and OA equipment in recent years, there is a tendency that colorization of liquid crystal display is required,
In many cases, colorization is required even for equipment in a field using a reflection type liquid crystal device. However, in the method of combining the transflective liquid crystal device having the above configuration with the color filter, the transflector is disposed behind the liquid crystal panel, and the liquid crystal panel is interposed between the liquid crystal layer or the color filter and the transflector. Since a thick transparent substrate is interposed, double reflection due to parallax, blurring of display, and the like occur, as described above, and there is a problem that sufficient color formation cannot be obtained.

Therefore, in order to solve these problems,
A transflective liquid crystal device of a type in which a pixel electrode also serving as a transflective film is provided on the inner surface of a liquid crystal panel has been proposed. The specific configuration of this liquid crystal device is a reflection type liquid crystal device having a pixel electrode also serving as a reflective layer as described above, in which an opening (window) is provided at the center of the pixel electrode. In some cases, external light is reflected on the surface of the pixel electrode, and during transmissive display, light from a backlight is transmitted through a window of the pixel electrode.

[0006]

However, the transflective liquid crystal display device having the above configuration has the following problems. For example, when a plurality of pixels are arranged vertically and horizontally in a matrix and one opening having the same shape and the same size is provided in the center of each pixel region, a black streak appears on the screen during the transmissive display. This means that the image is roughened due to the regular occurrence, and a rough feeling is felt. The reason is that at the time of transmissive display, light emitted from the backlight is transmitted only through the opening and contributes to display, and light in the area other than the opening is blocked by the transflective layer. Therefore, in the case where openings having the same shape and the same size are provided in the center of the pixel region, the edges of the plurality of openings in the plurality of pixels arranged in the pixel column direction or the pixel row direction are linearly arranged. Conversely, when the light-shielding region outside the opening is viewed, the edges of the light-shielding region are arranged in a straight line, and have a certain width (corresponding to the interval between the edges of the opening of the adjacent pixel facing each other). Is a black stripe.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a transflective liquid crystal display device having high display quality and little variation in image brightness. Aim. Another object is to provide an electronic device including such a liquid crystal display device.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and more particularly, in a color liquid crystal device having a delta array color filter, a transflective liquid crystal having high display quality and a bright image. It is intended to provide a device. Another object is to provide an electronic device including such a liquid crystal device.

[0009]

In order to achieve the above object, a liquid crystal device according to the present invention comprises a liquid crystal sandwiched between a pair of substrates, and a half of the liquid crystal is provided on one of the pair of substrates. A liquid crystal device provided with a transmission / reflection layer and an illuminating means provided outside the one substrate, wherein the liquid crystal device is opposed to the semi-transmission / reflection layer on an incident side of external light with a liquid crystal interposed therebetween. An electrode made of a transparent conductive film is provided, and the semi-transmissive reflection layer is provided with an opening for transmitting light emitted from the lighting means corresponding to each of a plurality of pixel regions defined by the electrode. And a delta arrangement type color filter is provided on one of the pair of substrates.

In the liquid crystal device of the present invention, an electrode (scanning electrode, data signal electrode, or pixel electrode) is provided at a position near the liquid crystal on the transflective layer, and the function of transmitting or reflecting light is transflective. The function of the layers to drive the liquid crystal by the electric field is shared by the electrodes. Since the transflective layer has an opening for each pixel region, external light incident on the liquid crystal device is reflected on the surface of the transflective layer, while light emitted from the illumination unit is not reflected on the surface of the transflective layer. The liquid crystal is transmitted through the opening. As described above, in the liquid crystal device of the present invention, since the transflective layer and the electrode share the functions as described above, the size of the window provided in the transflective layer is not restricted, and Opening area and shape can be set.

Further, according to the present invention, the color filters are arranged in a delta arrangement, so that in the case of transmissive display, a light-shielding region is generated linearly and continuously in a column direction over a plurality of pixel columns. Can be prevented. Therefore, during the transmissive display, it is possible to reduce the roughness and roughness of the image due to the occurrence of black streaks.

In a semi-transmissive reflective layer, it is sufficient to provide one opening at the center of each pixel region when considered very generally. However, it is necessary to provide a plurality of openings for each pixel region. Is desirable. The reason for this is that while reflection display does not cause much problem, during transmission display only light transmitted through the opening contributes to display, and light in the area other than the opening is blocked by the semi-transmissive reflection layer. Become. Therefore, when one opening is provided in the center of the pixel region, the portion that is shielded from light in the region other than the opening is collectively large, and the texture of the display image may be coarse. In this regard, when a plurality of openings are dispersedly provided in the pixel region so as to have the same opening area as that of a single pixel, a portion other than the openings during light transmission display is shielded from light. Is also divided, so that a detailed display image can be obtained.

In particular, when two openings are provided for each pixel region in the transflective layer, these two openings may be arranged along the direction of each side of the rectangular pixel region. Alternatively, they may be arranged obliquely to the sides.

In the case where the pixels are arranged obliquely with respect to the side, in the arrangement of a plurality of pixel regions corresponding to the delta arrangement of the color filters, when a pixel row in a direction in which the plurality of pixel regions are linearly arranged is viewed. It is desirable that the openings arranged obliquely be arranged in a staggered pattern over the entire row. However, the meaning of the “pixel column” in the present invention does not necessarily indicate only a column of pixels arranged in the vertical direction, but also includes a column of pixels arranged in the horizontal (row) direction.

The term "staggered" in the present invention means that, for example, when rectangular openings are arranged in a staggered manner over a plurality of pixel regions of a pixel row, attention is paid to the edges of the plurality of openings in one direction. When the edge of any one opening protrudes to one side from the edges of two openings adjacent thereto, the edge of the next opening next to the edge of the two openings adjacent thereto The opening protrudes to the other side, which means that the opening is zigzag as a relative positional relationship between adjacent openings. Therefore,
Of course, it is sufficient if the zigzag is regular. However, the amplitude of the undulation does not necessarily have to be constant, and the center of the undulation may not be on a straight line.

Further, in that case, when the arrangement of the openings in the pixel column is viewed, two adjacent pixels are arranged in the direction in which they are linearly arranged.
It is desirable that the positional relationship between the openings of the two pixel regions is inverted around the boundary between the two pixel regions.

Alternatively, in an arrangement of a plurality of pixel regions corresponding to the delta arrangement, when two adjacent pixel columns are viewed in a direction in which the plurality of pixel regions are not arranged in a straight line, the two pixel columns are located between the two pixel columns. The configuration may be such that the positional relationship of the openings of the pixel regions of the same color closest to each other is inverted around the boundary between these two pixel columns.

When performing transmissive display in the liquid crystal device of the present invention, if the openings in the pixel region of the same color are arranged in a straight line, a streak of the color is formed, so that the texture of the displayed image may be coarse. However, in particular, when the two openings are arranged obliquely with respect to the sides of the pixel region and the above-described specific arrangement is adopted, the openings in the pixel region of the same color, that is, the image display region of the same color are straight lines. Since the line does not line up or the line does not continue for a long time even if it is lined up to some extent, a fine display image can be obtained.

An electronic apparatus according to the present invention includes the liquid crystal device according to the present invention.

According to the present invention, there is provided an electronic apparatus having a liquid crystal device of the present invention, having low power consumption, a bright screen even in transmissive display, and having a color display portion capable of displaying moving images. Can be realized.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment of the present invention will be described below with reference to FIGS.

In the present embodiment, a thin film diode (hereinafter, referred to as T), which is one of the two-terminal nonlinear elements, is used.
A description will be given of an example of a TFD active matrix type liquid crystal device using (FD) as a switching element of a pixel. The present liquid crystal device is a transflective color liquid crystal device which incorporates a transflective layer and a color filter layer and has a backlight.

FIG. 1 is a diagram showing an equivalent circuit of the liquid crystal device of the present embodiment, FIG. 2 is a perspective view showing the liquid crystal device in an exploded state, and FIG. 3 is a sectional view taken along line AA 'in FIG. FIG. 4 is a layout view of each pixel on an element substrate constituting a liquid crystal device, and FIG.
6 is an enlarged view of a pixel, FIG. 6 is a cross-sectional view along the line BB ′ in FIG. 5, and FIG. 7 is a view showing a color arrangement at the time of transmissive display. In addition,
In each drawing, in order to make each layer or each member a size recognizable in the drawing, or for the sake of illustration,
The scale is different for each layer and each member.

The liquid crystal device 1 according to the present embodiment includes a scanning signal driving circuit 2 and a data signal driving circuit 3, as shown in FIG. The liquid crystal device 1 is provided with signal lines, that is, a plurality of scanning lines 4 and a plurality of data lines 5. The scanning lines 4 are driven by the scanning signal driving circuit 2, and the data lines 5 are driven by the data signal driving circuit 2. You. And
In each pixel region 6, a TFD element 7 and a liquid crystal 8 are connected in series between the scanning line 4 and the data line 5. Then, based on signals applied to the scanning lines 4 and the data lines 5, the display operation is controlled by switching the liquid crystal 8 to a display state, a non-display state or an intermediate state. As a control method of the display operation, a generally used method can be applied. In FIG. 1, the TFD element 7 is connected to the data line 5
And the liquid crystal 8 is connected to the scanning line 4 side. Conversely, the TFD element 7 is connected to the scanning line 4 side and the liquid crystal 8 is connected to the scanning line 4 side.
May be connected to the data line 5 side.

FIG. 2 is a perspective view schematically showing a schematic configuration of the liquid crystal device 1 of the present embodiment. The liquid crystal device 1 includes a liquid crystal cell 9 composed of two substrates on which a liquid crystal (not shown in FIG. 2) is sandwiched, and a backlight 10 (illuminating means) disposed below the liquid crystal cell 9. . The liquid crystal cell 9 includes an element substrate 12 having pixel electrodes 11r, 11g, 11b, a TFD element (not shown in FIG. 2), a data line (not shown in FIG. 2), a scanning line 4 (electrode), and a color filter layer. 1
4, a color filter substrate 16 having a semi-transmissive reflection layer 15 and the like are arranged to face each other, and a liquid crystal is sealed between these substrates 12 and 16. A rectangle indicated by reference numeral 17 in FIG. 2 is a window (opening) provided for each pixel in the semi-transmissive reflection layer 15 to transmit light emitted from the backlight 10 to the liquid crystal side during transmissive display. is there.

As shown in FIG. 3, a color filter substrate 16 is formed on a transparent substrate 18 made of glass, quartz, or the like, with a light reflectance of, for example, aluminum, silver, an aluminum alloy, or a silver alloy such as a silver-palladium-copper alloy. The transflective layer 15 made of a high metal film is formed. The transflective layer 15 is formed over substantially the entire surface of the substrate. As described above, the transflective layer 15 is provided with the rectangular window 17 for each pixel. The pixel electrode 1 on the element substrate 12
The R, G, and B colored layers 19r, 19g, which form the color filter layer 14 on the transflective layer 15 of the color filter substrate 16 corresponding to the formation positions of 1r, 11g, and 11b, respectively.
19b are formed, and each pixel electrode 11r, 11g,
11b and the scanning line 4 are opposed to each other.
The region where r, 19g, and 19b are formed is a substantially rectangular pixel region 6 corresponding to each color. A rectangular window 17 is arranged at the center of each pixel area 6.

Further, each of the colored layers 19r, 19g, 19b
Are covered with a protective layer 20 made of, for example, an acrylic resin, and a strip-shaped scanning line 4 is formed. Scan line 4
Stands for Indium Tin Oxide (hereinafter, I)
(Abbreviated as TO)). In addition, a non-display area on the transflective layer 15 where the pixel electrodes 11r, 11g, and 11b are not formed on the element substrate 12 (an area where the data lines 5 and the TFD elements and the like are formed) is outside during reflection display. A light shielding layer 21 for shielding reflected light is formed. The light shielding layer 21 is formed of a metal having a low light reflectance, for example, a metal film of chromium or the like, or a resin in which a black pigment is dispersed.

The element substrate 12 is composed of a base insulating film 2 made of, for example, a tantalum oxide film on a transparent substrate 22 of glass, quartz or the like.
3 are formed, and a plurality of data lines 5,
TFD element 7 described later (not shown in FIG. 3)
And pixel electrodes 11r, 11g, and 11b. The pixel electrodes 11r, 11g, and 11b are formed of a transparent conductive film such as ITO, like the scanning lines 4 on the color filter substrate 16 side. The base insulating film 23 is formed of the TFD element 7
The purpose of the present invention is to prevent the first conductive film from peeling off due to the heat treatment performed after the formation of the second conductive film, and to prevent diffusion of impurities from the transparent substrate 22 into the first conductive film. It is formed and is not always necessary if these do not matter. Although not shown in FIG. 3, an alignment film is actually formed on the surfaces of the substrates 12 and 16 that are in contact with the liquid crystal 24.

In the element substrate 12, as shown in FIG. 4, the pixel electrodes 11r, 11r,
11g and 11b are arranged so as to be shifted by about a half pitch for each row. Each of the plurality of data lines 5 extends in the column direction so as to sew between the pixel electrodes 11 r, 11 g, and 11 b shifted by a half pitch, and the respective pixel electrodes 11 r, 11 g, and 11 b are interposed via the TFD element 7. Is connected to FIG.
4 shows four data lines 5. These data lines 5 are, from left to right in FIG. 4, data lines shared by G and B pixels and data lines shared by B and R pixels. line,
A data line shared by the R and G pixels and a data line shared by the G and B pixels. In the present embodiment, the data lines 5 are configured as described above. However, various patterns can be considered for the layout of the data lines, and the pattern is not limited to the pattern of FIG. In the following description, the horizontal direction in FIG. 4, that is, the direction in which a plurality of pixels are arranged in a straight line, is the row direction, and the vertical direction in FIG. 4, that is, the plurality of pixels is not arranged in a straight line, and A direction in which the lines are shifted by a pitch is called a column direction. The scanning lines 4 on the color filter substrate 16 side are arranged in stripes along the row direction.

The detailed structure of each pixel region 6 on the element substrate 12 is as shown in FIG. The data line 5 and the individual pixel electrodes 11r, 11g, 11b are
, But in the case of the present embodiment,
T with back-to-back structure
An FD element is employed. The TFD element having the back-to-back structure is, as shown in FIG.
It has a structure in which the element 26 and the second TFD element 27 are connected in series with opposite polarities. TFD element 7
As shown in FIG. 6, a first conductive film 28 made of a tantalum-based conductive film such as a tantalum simple film or a tantalum alloy film, and an insulating film formed on the surface of the first conductive film 28 by anodic oxidation 29, and a second conductive film 30 formed on the surface of the insulating film 29. And
The second conductive film 30 of the first TFD element 26 is connected to the data line 5
And the second conductive film 30 of the second TFD element 27
Are connected to the pixel electrode 11r. Further, in FIG. 3, the data line 5 is illustrated as if it were formed of a single metal film, but in fact, as shown in FIG. The first conductive film 28, the insulating film 29, and the second conductive film 30 are stacked.

The liquid crystal device of the present invention is a transflective liquid crystal device. By changing the size of the window of the transflective layer, an effective image which contributes to the display during the reflective display and the transmissive display can be obtained. The size of the display area can be appropriately adjusted. The description will be made separately for reflection display and transmission display. Here, FIG.
FIG. 7 is a diagram illustrating only the arrangement of pixels of each color of G and B and a window corresponding to the pixels. Hereinafter, description will be made with reference to a cross-sectional view of the entire apparatus in FIG. 3 and FIG.

First, the reflection display is performed as follows. That is, external light incident from the element substrate 12 side sequentially passes through the liquid crystal 24 and the scanning line 4 and is reflected on the surface of the transflective layer 15 located therebelow, and is emitted to the element substrate 12 side to form an image. Is displayed. On the other hand, since the incident light is not reflected in the area where the window 17 is formed, black display is performed. Further, since the incident light is not reflected in the region where the light shielding layer 21 is formed, and even in the region where the light shielding layer 21 is not formed on the semi-transmissive reflection layer 15, the opposing pixel electrode 11 is formed.
Since the liquid crystal 24 is not driven in an area where r, 11g, and 11b do not exist, black display is performed. Therefore,
The effective image display area during the reflective display is the pixel area 6r,
Of 6g and 6b, it becomes a frame-shaped area outside window 17 shown in FIG.

On the other hand, the transmissive display is performed as follows. First, light that reaches the transflective layer 15 from the backlight 10 disposed on the outer surface side of the color filter substrate 16 is emitted only from the area where the window 17 is formed, passes through the liquid crystal 24 above this area, and passes through the element. The image is emitted from the substrate 12 and displayed. On the other hand, since the transflective layer 15 formed of a metal film such as aluminum does not transmit light, light does not transmit to the liquid crystal side in a region other than the region where the window 17 is formed. Therefore, in the case of the transmissive display, a portion other than the region where the window 17 is formed is a light shielding region. Therefore, the effective image display area during the transmissive display is the pixel area 6r, 6g, 6b.
Of these, a rectangular area inside the window 17 shown in FIG. 7 is formed.
That is, the pixel regions 6r, 6g, and 6b are each
When the areas 1r, 11g, 11b and the scanning lines 4 are defined as opposing areas, the effective image display areas during the reflective display and the transmissive display are inverted.

In the case of the present embodiment, the transflective layer 15 on the color filter substrate 16 is formed separately from the scanning lines 4 contributing to the driving of the liquid crystal, and has no function as an electrode. The opening area of the window 17 formed in the reflective layer 15 can be freely set, and the brightness and appearance of the image can be adjusted in each of the reflective display and the transmissive display. For example, if the opening area of the window 17 is made relatively small, the area where the transflective layer 15 functions as a reflective layer becomes large, so that an image during reflective display can be made brighter. Conversely, if the opening area of the window 17 is relatively large, the amount of light from the backlight 10 is effectively increased, so that the image during the transmissive display can be made brighter. As an example, the window 1 for the entire area of the pixel region 6
It is desirable that the ratio (opening ratio) of the opening area of No. 7 is about 10 to 60%. The reason is that the aperture ratio of the window 17 is 10%.
If the value is less than the above, the brightness during the transmissive display may be insufficient, and if it exceeds 60%, the reflectivity during the reflective display may decrease.

According to the present invention, since the color filters are arranged in a delta arrangement, it is possible to reduce the occurrence of a linear light-shielding region in the column direction due to a plurality of pixel columns in transmissive display. Therefore, during the transmissive display, it is possible to reduce the roughness and roughness of the image due to the occurrence of black streaks.

[Second Embodiment] Next, a second embodiment of the present invention will be described.
The embodiment will be described with reference to FIG.

The basic structure of the liquid crystal device according to the second to sixth embodiments described below is exactly the same as that of the first embodiment. The difference from the first embodiment is that the liquid crystal device is semi-transmissive. This is only the arrangement of the windows provided in the reflection layer. Therefore, hereinafter, only the arrangement of the windows in the pixel region will be described with reference to the diagram corresponding to FIG. 7 of the first embodiment, and the description of the configuration of the liquid crystal device will be omitted.

In the arrangement of the windows in the present embodiment, as shown in FIG. 8, two windows 32 are provided for each of the pixel regions 6r, 6g, and 6b, and these two windows 32 are arranged in the pixel row direction. They are arranged side by side.

Also in the liquid crystal device of the present embodiment, the brightness and appearance of an image can be freely adjusted in each of reflective display and transmissive display.

Further, in the liquid crystal device according to the present embodiment, in order to obtain an aperture ratio similar to that of the first embodiment, for example, a window obtained by dividing one window of the first embodiment into half. 32 may be provided. In the case of this embodiment, 2
Since the windows 32 are divided and arranged, the light-shielded area outside the windows 32 is also dispersed. Therefore, compared to the first embodiment, a more detailed display image can be said in another word. For example, a display image with less roughness can be obtained.

However, the relationship between the size of the light-blocking area outside the window and the roughness or roughness of the displayed image is also affected by various specifications of each liquid crystal device, and depends on the user's responsive judgment. Therefore, how much the light-shielding area is specifically reduced to reduce the roughness is not always determined. Therefore, it is necessary to appropriately adjust the size and arrangement of the windows so as to reduce the roughness of the image as seen by the human eye in accordance with each liquid crystal device.

[Third Embodiment] Next, a third embodiment of the present invention will be described.
The embodiment will be described with reference to FIG.

In the arrangement of the windows in this embodiment, as shown in FIG. 9, two windows 33 are provided for each of the pixel regions 6r, 6g, and 6b. Are arranged in a diagonal direction with respect to (a diagonal line of substantially rectangular pixels). Further, a plurality of pixel regions 6r, 6g,
When 6b is viewed in the row direction, two windows 33 arranged diagonally are arranged in a zigzag pattern over the entire row.

In the liquid crystal device of this embodiment, the window 3
The same effect as in the second embodiment can be obtained, such that a display image with reduced roughness can be obtained by dispersing the light-shielding region outside the third region.

[Fourth Embodiment] Next, a fourth embodiment of the present invention will be described.
The embodiment will be described with reference to FIG.

The arrangement of the windows in this embodiment is shown in FIG.
As shown in FIG. 2, two windows 34 are provided for each of the pixel regions 6r, 6g, and 6b, and these two windows 34 are
r, 6g, and 6b are arranged so as to be obliquely arranged with respect to each side. Further, a plurality of pixel regions 6r, 6g, 6
When b is viewed in the row direction, the positional relationship between the windows 34 of the two pixel regions adjacent in the row direction is inverted around the boundary between these pixel regions.

In the liquid crystal device of this embodiment, the window 3
The same effect as in the third embodiment can be obtained, such that a display image with reduced roughness can be obtained by dispersing the light-shielding region outside of No. 4.

However, in the third embodiment shown in FIG. 9, as an example, as shown by a broken line for the pixel G,
Since the window 33 of the pixel region of the same color, that is, the image display region at the time of transmissive display tends to be linearly arranged in an oblique direction, R,
Streaks of each color of G and B are formed, and the texture of the image may be coarse due to this. On the other hand, in the present embodiment shown in FIG. 10, the windows 34 are linearly arranged in two pixels of the same color in the oblique direction, as shown by a broken line for the G pixel as an example, No more lines. Therefore, an effect is obtained in which the image display area can be lined up in a diagonal direction during the transmissive display to form streaks of each color, thereby reducing the image roughness.

[Fifth Embodiment] Next, a fifth embodiment of the present invention will be described.
The embodiment will be described with reference to FIG.

The arrangement of the windows in this embodiment is shown in FIG.
As shown in FIG. 2, two windows 35 are provided for each of the pixel regions 6r, 6g, and 6b, and these two windows 35 are provided in the pixel regions 6r, 6g, and 6b.
r, 6g, and 6b are arranged so as to be obliquely arranged with respect to each side. Further, a plurality of pixel regions 6r, 6g, 6b
When viewed in the row direction, two windows arranged diagonally are arranged in a zigzag pattern over the entire row. Further, when viewing two adjacent pixel rows in the column direction, the positional relationship of the window 35 of the closest pixel area of the same color is inverted about the boundary between these pixel rows.

In the liquid crystal device of this embodiment, the window 3
The same effects as in the third embodiment can be obtained, such that a display image with reduced roughness can be obtained by dispersing the light-shielding region outside of No. 5.

In the fourth embodiment shown in FIG. 10, as an example, as shown by a broken line for a G pixel,
Although the windows 34 are linearly arranged in two pixels of the same color in the oblique direction, in the present embodiment shown in FIG. 11, as an example, as shown by the broken line for the pixel G, The window 35, that is, the image display area during the transmissive display, does not line up linearly across the pixels. Therefore, the arrangement of the image display areas during the transmissive display becomes more irregular, and the image roughness can be further reduced.

[Sixth Embodiment] Next, a sixth embodiment of the present invention will be described.
Will be described with reference to FIG.

The arrangement of the windows in this embodiment is shown in FIG.
As shown in FIG. 3, two windows 36 are provided for each of the pixel regions 6r, 6g, and 6b, and these two windows 36 are connected to the pixel region 6r.
r, 6g, and 6b are arranged so as to be obliquely arranged with respect to each side. Further, a plurality of pixel regions 6r, 6g, 6b
Is viewed in the row direction, the positional relationship between the windows 36 of two pixel regions adjacent in the row direction is inverted with the boundary between these pixel regions as the center. Further, when two adjacent pixel rows in the column direction are viewed, the positional relationship of the window 36 of the closest pixel area of the same color is inverted about the boundary between these pixel rows.

In the liquid crystal device of this embodiment, the window 3
Dispersion of the light-shielding area outside 6 allows a display image with reduced roughness to be obtained. Irregular arrangement of the image display area in the oblique direction during transmissive display further reduces the roughness of the image. That is, the same effect as that of the fifth embodiment can be obtained.

[Electronic Apparatus] An example of an electronic apparatus including the liquid crystal device of the above embodiment will be described.

FIG. 13 is a perspective view showing an example of a mobile phone.

In FIG. 13, reference numeral 1000 denotes a portable telephone body, and reference numeral 1001 denotes a liquid crystal display unit using the above liquid crystal device.

FIG. 14 is a perspective view showing an example of a wristwatch-type electronic device.

In FIG. 14, reference numeral 1100 denotes a watch main body, and reference numeral 1101 denotes a liquid crystal display unit using the above liquid crystal device.

FIG. 15 is a perspective view showing an example of a portable information processing device such as a word processor or a personal computer.

In FIG. 15, reference numeral 1200 denotes an information processing device, reference numeral 1202 denotes an input unit such as a keyboard,
Reference numeral 204 denotes a main body of the information processing apparatus, and reference numeral 1206 denotes a liquid crystal display unit using the above liquid crystal device.

The electronic apparatus shown in FIGS. 13 to 15 is provided with a liquid crystal display unit using the above-mentioned transflective liquid crystal device, so that the power consumption is small, the screen is bright even in the transmissive display, and the moving image display is performed. It is possible to realize an electronic device having a color liquid crystal display portion suitable for the electronic device.

The technical scope of the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention. For example, the shape, number, arrangement, and the like of the windows formed in the transflective layer are not limited to those exemplified in the above embodiment, and various changes can be made. For example, instead of a rectangular window, a polygonal or more circular window may be provided,
Three or more windows may be provided in each pixel region. Further, the shape, size, and number of windows may be different depending on the pixel area. Further, instead of the configuration of each substrate in the above-described embodiment, a semi-transmissive reflection layer may be provided on the element substrate side, and external light may be incident from the color filter substrate side, or a material of various films on each substrate may be used. And the like can be appropriately changed. In the above embodiment, an example of an active matrix type liquid crystal device using a TFD as a switching element has been described. However, the present invention also provides an active matrix type liquid crystal device using a thin film transistor (TFT) as a switching element. It may be applied to a liquid crystal device, may be applied to a passive matrix type liquid crystal device,
It is not limited to the form of the liquid crystal device.

[0065]

As described in detail above, according to the transflective liquid crystal device of the present invention, since the light-shielding area other than the opening during the transmissive display is divided, the display without fine grainy feeling is obtained. Images can be obtained.

[Brief description of the drawings]

FIG. 1 is an equivalent circuit diagram of a liquid crystal device according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same liquid crystal device.

FIG. 3 is a sectional view taken along the line A-A 'of FIG.

FIG. 4 is a layout view of each pixel on an element substrate constituting the liquid crystal device.

FIG. 5 is an enlarged plan view of a pixel portion of FIG. 4;

FIG. 6 is a sectional view taken along the line B-B 'of FIG.

FIG. 7 is a schematic diagram showing a color arrangement during transmissive display.

FIG. 8 is a schematic diagram illustrating a color arrangement during transmissive display of a liquid crystal device according to a second embodiment of the present invention.

FIG. 9 is a schematic diagram illustrating a color arrangement during transmissive display of a liquid crystal device according to a third embodiment of the present invention.

FIG. 10 is a schematic diagram illustrating a color arrangement during transmissive display of a liquid crystal device according to a fourth embodiment of the present invention.

FIG. 11 is a schematic diagram illustrating a color arrangement during transmissive display of a liquid crystal device according to a fifth embodiment of the present invention.

FIG. 12 is a schematic diagram illustrating a color arrangement during transmissive display of a liquid crystal device according to a sixth embodiment of the present invention.

FIG. 13 is a perspective view illustrating an example of an electronic apparatus to which the liquid crystal device is applied.

FIG. 14 is a perspective view illustrating another example of an electronic apparatus to which the liquid crystal device is applied.

FIG. 15 is a perspective view showing still another example of the electronic apparatus to which the liquid crystal device is applied.

[Explanation of symbols]

 Reference Signs List 1 liquid crystal device 4 scanning line (electrode) 5 data line 6, 6r, 6g, 6b pixel region 7 TFD element 9 liquid crystal cell 10 backlight (illuminating means) 11r, 11g, 11b pixel electrode 12 element substrate 14 color filter layer 15 half Transmission / reflection layer 16 Color filter substrate 17, 32, 33, 34, 35, 36 Window (opening) 24 Liquid crystal

Claims (7)

[Claims] A liquid crystal is sandwiched between a pair of substrates,
A liquid crystal device in which a transflective layer is provided on one of the pair of substrates and illumination means is provided outside the pair of substrates, wherein the transflective layer is provided outside the transflective layer. On the light incident side, electrodes facing each other across the liquid crystal are provided, and the light emitted from the lighting unit is provided on the transflective layer corresponding to each of a plurality of pixel regions defined by the electrodes. A liquid crystal device, comprising: an opening for transmitting light; and a delta array type color filter corresponding to each of the pixel regions on one of the pair of substrates. 2. The liquid crystal device according to claim 1, wherein a plurality of the openings are provided in the transflective layer for each pixel region. 3. The transflective layer is provided with two openings for each pixel region, and these two openings are arranged obliquely with respect to each side constituting a rectangular pixel region. The liquid crystal device according to claim 2, wherein: 4. In the arrangement of the plurality of pixel regions corresponding to the delta arrangement of the color filters, the obliquely arranged openings are viewed when one pixel row in a direction in which the plurality of pixel regions are linearly arranged is viewed. The liquid crystal device according to claim 3, wherein the portions are arranged in a staggered pattern over the entire row. 5. When the arrangement of the openings in the one pixel column is viewed, the positional relationship between the openings of the two pixel regions adjacent to each other in the direction arranged in a straight line indicates the boundary between the two pixel regions. The liquid crystal device according to claim 4, wherein the liquid crystal device is inverted as a center. 6. In the arrangement of the plurality of pixel regions corresponding to the delta arrangement of the color filters, when two adjacent pixel columns are viewed in a direction in which the plurality of pixel regions are not arranged in a straight line, these two pixel columns are arranged in a line. 6. The positional relationship between openings of pixel regions of the same color which are located closest to each other between two pixel columns is inverted around a boundary between these two pixel columns. Liquid crystal devices. 7. An electronic apparatus comprising the liquid crystal device according to claim 1.