JP2007114801A - Liquid crystal display device and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color transflective liquid crystal display that is capable of displaying with proper coloring and high visibility in both the reflection mode and a transmission mode, while suppressing deterioration in color reproduction caused by the unevenness in the spectral properties of the illumination light, even if there is uneveness. <P>SOLUTION: The liquid crystal display includes a liquid crystal display panel, including pixels 615 formed of a plurality of sub-pixels 551 each corresponding to different colors, and an illumination device, wherein the liquid crystal display panel includes a transflective layer and a color filter 522 of color, corresponding to each of the sub-pixels 551. The transflective layer includes transmissive portions for transmitting illumination light, wherein the transmissive portion is formed, such that the dimensions of the transmissive area corresponding to the transmissive portion of at least one sub-pixel from among the plurality of sub-pixels 551 and the dimension of the transmissive area corresponding to the transmissive portion of another sub-pixel, differ. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquid crystal display device and an electronic apparatus, and more particularly to a transflective liquid crystal display apparatus that can display a color with high color visibility and high visibility in both a reflection mode and a transmission mode, and an electronic apparatus including the same About.

  A reflective liquid crystal display device has an advantage of low power consumption because it does not have a light source such as a backlight, and has been widely used for an attached display unit of various portable electronic devices. ing. However, since the reflective liquid crystal display device displays using natural light such as sunlight or external light such as illumination light, there is a drawback that it is difficult to visually recognize the display in a dark place.

In view of this, a liquid crystal display device has been proposed in which external light is used in a bright place in the same manner as a normal reflective liquid crystal display device, and in a dark place, an internal light source such as a backlight is used to make the display visible. . In other words, this liquid crystal display device employs a display method that combines a reflective type and a transmissive type. By switching to either the reflective mode or the transmissive mode depending on the ambient brightness, power consumption can be reduced. The display is designed to be clear even when the surroundings are dark, and external light contributes to the display in the reflective display, whereas it is emitted from the illumination device (backlight) in the transmissive display. The light (hereinafter referred to as “illumination light”) contributes to the display.
Hereinafter, in this specification, this type of liquid crystal display device is referred to as a “transflective liquid crystal display device”.

  The transflective liquid crystal display device is provided with a liquid crystal display panel in which liquid crystal is sandwiched between a pair of substrates, and light is applied to the substrate surface of the liquid crystal display panel. It is common to provide the illuminating device which irradiates. Further, a reflective layer (semi-transmissive reflective layer) having a plurality of openings is provided on the substrate opposite to the viewing side of the liquid crystal display panel.

In recent years, with the development of portable electronic devices, OA devices, etc., colorization of liquid crystal displays has been required, and even in electronic devices equipped with the above-described transflective liquid crystal display device, In many cases, colorization is required.
As a color transflective liquid crystal display device that meets this requirement, a transflective liquid crystal display device having a color filter has been proposed. In such a color transflective liquid crystal display device, external light incident on the liquid crystal display device in the reflection mode is transmitted through the color filter, reflected by the reflector, and transmitted through the color filter again. It has become. In the transmissive mode, light from the backlight is transmitted through the color filter. The same color filter is used in both the reflection mode and the transmission mode.

In such a color transflective liquid crystal display device, as described above, a color display is obtained by passing through the color filter twice in the reflection mode and once in the transmission mode.
For this reason, for example, when a light color filter is provided with emphasis on the display in the reflection mode in which the color filter is transmitted twice, the color is good in the transmission mode in which the color filter is transmitted only once. It is difficult to get an indication. However, in order to solve this problem, in the case of providing a dark color filter with an emphasis on display in the transmission mode in which the color filter is transmitted once, a reflection mode in which the color filter is transmitted twice. Since the display at the time becomes dark, sufficient visibility cannot be obtained. As described above, in the conventional transflective liquid crystal display device of color, it is difficult to obtain a display with high visibility and high visibility both in the reflection mode and in the transmission mode.

  In addition, illumination light emitted from an illumination device that uses an LED (Light Emitting Diode), a cold cathode tube, or the like as a light source often has a luminance (intensity) that is not uniform over all wavelengths in the visible light region. When transmissive display is performed using light having a nonuniform luminance distribution as described above, the spectral characteristics of light transmitted through the liquid crystal display panel and emitted to the observation side are also nonuniform. As a result, for example, when transmissive display is performed using illumination light whose luminance at a wavelength corresponding to blue is higher than that at other wavelengths, the color reproducibility is such that the display becomes bluish. There was a problem that would decrease.

The present invention has been made to solve the above-described problems, and even if the spectral characteristics of illumination light used for transmissive display are not uniform, the color reproducibility caused by this is reduced. In a transflective liquid crystal display device with a color that can be suppressed and has a reflective mode and a transmissive mode, a color transflective type that has good color development and high visibility in both the reflective mode and the transmissive mode. An object is to provide a liquid crystal display device.
Moreover, an object of this invention is to provide the electronic device provided with the liquid crystal display device which has said outstanding visibility.

  In order to achieve the above object, the present invention provides a liquid crystal sandwiched between a pair of opposing substrates, a plurality of subpixels corresponding to different colors, a light transmission region and light provided in the subpixels. A reflection region, a reflection layer provided in the light reflection region, and a color filter provided corresponding to the sub pixel, and one of the plurality of sub pixels in the longitudinal direction of the sub pixel. The width of the light transmission region in the sub-pixel is different from the width of the light transmission region in the other sub-pixels. Further, the liquid crystal sandwiched between a pair of opposing substrates, a plurality of subpixels corresponding to different colors, a light transmission region and a light reflection region provided in the subpixel, and provided in the light reflection region. A reflective layer and a color filter provided corresponding to the sub-pixel, and in the short direction of the sub-pixel, the width of the light transmission region in one sub-pixel of the plurality of sub-pixels is The width is different from the width of the light transmission region in other sub-pixels.

  According to such a liquid crystal display device, by making the ratio of the light transmissive region occupying any one of the plurality of sub pixels constituting the pixel different from the ratio of the light transmissive region occupying the other sub pixels, The substantial light transmittance of the sub-pixel with respect to the illumination light of the illumination device can be arbitrarily selected. Therefore, even if there is a variation in the spectral characteristics of illumination light (luminance, light intensity, spectral energy, etc. of illumination light at each wavelength), this is compensated for and the dispersion of the spectral characteristics of the light emitted from the liquid crystal display panel to the observation side It is possible to reduce or select the display color by the liquid crystal display panel by intentionally increasing the ratio of the light transmission region to the sub-pixel of any color.

  Here, in the present invention, it is desirable that the area of the light transmission region in each of the sub-pixels is an area corresponding to the spectral characteristics of the illumination light. In this way, even if there is a variation in the spectral characteristics of the illumination light, the variation is compensated by making the ratio of the light transmission region occupying each sub-pixel a proportion corresponding to the spectral characteristics, thereby improving Color reproducibility can be realized. Specifically, it is conceivable that the area of the light transmission region in each of the sub-pixels is an area corresponding to the luminance at the wavelength corresponding to the color of the sub-pixel in the illumination light. That is, the area of the light transmission region in the sub-pixel of the color corresponding to the wavelength with high luminance in the illumination light, and the area of the light transmission region in the sub-pixel of the color corresponding to the wavelength of low luminance in the illumination light The light having a high luminance in the illumination light can be set to a relatively low luminance in the observation light, while the light having a low luminance in the illumination light can be set to a relatively high luminance in the observation light. . In this case, if the area of the light transmission region in each of the sub-pixels is different for each sub-pixel corresponding to a different color (that is, the area of the light-transmission region is the same between sub-pixels corresponding to the same color). This has the advantage that the configuration can be simplified.

  In addition, the spectral characteristics of the illumination light may vary depending on the position in the substrate surface of the liquid crystal display panel. In such a case, it is desirable that the area of the light transmission region in each of the sub-pixels varies depending on the position of the sub-pixel in the substrate surface of the liquid crystal display panel. By so doing, it is possible to compensate for variations in the spectral characteristics of illumination light within the substrate surface (that is, differences between the spectral characteristics at a certain position in the substrate surface and the spectral characteristics at other positions). Color reproducibility can be improved.

  As an aspect of the light transmitting portion, it is conceivable to form an opening corresponding to each subpixel in the transflective layer. When this configuration is adopted, the opening can be formed by removing a part of the semi-transmissive reflection layer formed in advance by etching or the like, and the manufacturing process can be simplified. Here, it is conceivable to provide one opening for one subpixel. In this case, however, the opening is concentrated in a partial region of the subpixel. As a result, the display may feel rough. In order to solve such a problem, it is conceivable that openings having substantially the same area are formed as the openings by being separated from each other by the number corresponding to the area of the light transmission region in the sub-pixel. By so doing, the openings can be dispersed throughout the sub-pixels, so that it is possible to avoid the above-described display roughness.

  Further, as another aspect of the transflective layer in the liquid crystal display device, the transflective layer is provided in the transflective layer so that a region along at least one side of the plurality of sides defining each subpixel becomes the light transmissive region. An optical part can be formed.

  In addition, the liquid crystal display device includes a liquid crystal layer sandwiched between an upper substrate and a lower substrate facing each other, an inner surface side of the lower substrate, a light transmission region that transmits light, and an incident from the upper substrate side A semi-transparent reflective layer having a light reflective area for reflecting the light to be transmitted, and a plurality of dye layers of different colors arranged on the upper side of the semi-transmissive reflective layer corresponding to each sub-pixel constituting the display area A transflective liquid crystal display device having a color filter and an illumination device provided on an outer surface side of the lower substrate and performing display by switching between a transmission mode and a reflection mode, Each of the dye layers is formed in the entire area that overlaps the area in a plane and in the area that overlaps the light reflection area in a plane, and the dye layer of at least one color overlaps the light reflection area in a plane Formed only in part of the region, The area of the dye layer forming region in which the dye layer is formed is formed so that the dye layer of at least one color among the plurality of dye layers of different colors and the dye layer of the other color are different. can do.

  In such a liquid crystal display device, each dye layer is formed in the entire region that overlaps the light transmission region in a plane and the region excluding a part of the region that overlaps the light reflection region in a plane. A dye layer forming region in which a dye layer is formed, and a region in which each dye layer is not provided in a part of a region overlapping the light reflecting region in plan (hereinafter referred to as “dye layer non-forming region”). Therefore, a part of the external light incident on the liquid crystal display device in the reflection mode is transmitted through the dye layer non-formation region, and the light obtained by transmitting the color filter twice in the reflection mode is The light is a combination of uncolored light that passes through the dye layer non-forming region and colored light that passes through the dye layer forming region. On the other hand, all the light that is incident from the backlight and transmitted through the light transmission region in the transmission mode is transmitted through the dye layer formation region, and all the light obtained by transmitting once through the color filter in the transmission mode is all It becomes colored light. Thus, the difference in color density between the light obtained by passing through the color filter twice in the reflection mode and the light obtained by passing through the color filter once in the transmission mode can be reduced.

As a result, it is possible to realize a color transflective liquid crystal display device that has a good color and can display with high visibility in the reflection mode and the transmission mode.
In addition, since the area of the dye layer forming region is different between at least one of the dye layers and the other color dye layer, the color characteristics of the color filter can be changed. Since it can be adjusted by changing the area of the layer formation region and color reproducibility can be improved, a liquid crystal display device having excellent display quality can be realized.

In the above liquid crystal display device, the dye layer is composed of a red layer, a green layer, and a blue layer, and the area of the dye forming region is smaller in the green layer than in the red layer and the blue layer. It is desirable to be provided.
By setting it as such a liquid crystal display device, when a pigment | dye layer consists of a red layer, a green layer, and a blue layer, the color reproducibility can be improved further and the liquid crystal which has more excellent display quality A display device can be realized.

In the above liquid crystal display device, it is desirable that a transparent film for flattening a step between the dye layer forming region and the region where the dye layer is not provided is provided.
By adopting such a liquid crystal display device, the step difference between the dye layer forming region and the region where the dye layer is not provided causes variations in the cell gap, resulting in display unevenness and the like. It is possible to prevent an adverse effect due to a step difference from a region where no liquid crystal is provided, and to improve the reliability of the liquid crystal display device.

In the above liquid crystal display device, the light transmission region can be formed by opening the transflective layer in a window shape.
In the above liquid crystal display device, a strip-shaped transparent electrode is provided on the inner surface side of the lower substrate, and the width of the pattern of the transparent electrode is formed to be larger than the width of the pattern of the transflective layer. Thus, the band-like light transmission region may be formed in the transflective layer.

In the above liquid crystal display device, the transflective layer is made of aluminum or an aluminum alloy, the dye layer includes a blue layer, and the area of the dye layer forming region is blue compared to the red dye layer. It is desirable that the layer be provided so as to be small.
In such a liquid crystal display device, since the area of the dye layer forming region is provided so that the blue layer is smaller than the red dye layer, the transflective layer is made of aluminum, Even if the light reflected by the transflective layer is colored blue, it is corrected by passing through the color filter twice, so that a liquid crystal display device having excellent color reproducibility and high display quality can be realized. .

In the above liquid crystal display device, the transflective layer is made of silver or a silver alloy, the dye layer includes a red layer and a blue layer, and the area of the dye layer forming region is a blue dye. It is desirable that the red layer is provided to be smaller than the layer and the blue layer is provided to be larger.
In such a liquid crystal display device, the area of the dye layer forming region is provided so that the red layer is smaller and the blue layer is larger than the blue dye layer, so that the semi-transmissive Since the reflection layer is made of silver, even if the light reflected by the transflective layer is colored yellow, it is corrected by passing through the color filter twice, so it has excellent color reproducibility and high display. A liquid crystal display device having quality can be realized.

In the liquid crystal display device described above, it is preferable that the color characteristics of the color filter are adjusted by changing the area of the dye layer forming region.
Such a liquid crystal display device reduces the difference in color density between light obtained by passing through the color filter twice in the reflection mode and light obtained by passing through the color filter once in the transmission mode. And the color reproducibility can be improved. As a result, similarly to the reflective mode and the transmissive mode, it is possible to realize a color transflective liquid crystal display device with good color development, high visibility, and excellent color reproducibility.

  In addition, the liquid crystal display device has a liquid crystal layer sandwiched between an upper substrate and a lower substrate facing each other, and includes a plurality of sub-pixels corresponding to different colors, each having a pixel constituting a display region. And an illuminating device for irradiating the liquid crystal display panel with illumination light, provided on the opposite side (outer surface side of the lower substrate) to the liquid crystal display panel, and observing the liquid crystal layer A transflective layer provided on the opposite side (the inner surface side of the lower substrate) and a plurality of dye layers of different colors corresponding to the sub-pixels provided above the transflective layer. A transflective liquid crystal display device comprising a color filter arranged and transmitting light of a wavelength corresponding to the color of the sub-pixel, and performing display by switching between a transmission mode and a reflection mode. The transmissive / reflective layer transmits the illumination light. The transflective layer has a light transmissive region that transmits light and a light reflective region that reflects light incident from the upper substrate side, and at least one of the plurality of sub-pixels. The translucent part is formed such that the area of the light transmissive region corresponding to the translucent part in one subpixel is different from the area of the light transmissive region corresponding to the translucent part in the other subpixel, and the light Each of the dye layers is formed in the entire area overlapping the transmission area in a plane and in the area overlapping the light reflection area in a plane, and the dye layer of at least one color is planar with the light reflection area. The area of the dye layer non-formation area where the dye layer is not formed in at least one subpixel among a plurality of subpixels, and the dye layer non-formation area in other subpixels The area of is different It can be a thing.

  In such a liquid crystal display device, the area of the light transmissive region corresponding to the light transmissive portion in at least one sub pixel of the plurality of sub pixels and the light transmissive region corresponding to the light transmissive portion in the other sub pixels are included. The translucent portion is formed so as to have a different area, and the area of the dye layer non-formation region in which each of the dye layers is not formed in at least one subpixel of the plurality of subpixels, and in the other subpixels The area of the dye layer non-forming region is different.

  Accordingly, in such a liquid crystal display device, display is performed by changing the ratio of the light transmission region and the light reflection region in any one of the plurality of subpixels and the other subpixels. While adjusting the color and brightness, the ratio of the area of the dye layer forming area and the dye layer non-forming area is changed between at least one of the dye layers and the dye layer of the other colors. The display color and brightness can be adjusted by adjusting the color characteristics of the color filter.

In a conventional transflective liquid crystal display device, if the light transmission region is increased to improve the transmittance so that a bright display can be obtained in the transmission mode, the reflectance decreases and the display in the reflection mode becomes dark. Due to the disadvantages, it has been difficult to realize a transflective liquid crystal display device capable of obtaining a bright display both in the reflection mode and in the transmission mode.
On the other hand, in the above liquid crystal display device, even if the light transmission area is increased to improve the transmittance and the light reflection area is reduced so that a bright display can be obtained in the transmission mode, the dye layer non-formation area By increasing the area, it is possible to obtain a reflectance sufficient to obtain a bright display in the reflection mode, so that there is no inconvenience that the display in the reflection mode becomes dark.
Therefore, according to the liquid crystal display device described above, the brightness can be adjusted effectively, and a bright display can be performed in both the reflection mode and the transmission mode.

  Further, in such a liquid crystal display device, the display color is adjusted by changing the ratio of the light transmission region and the light reflection region occupying each sub-pixel, and the dye layer formation region and the dye layer non-layer of each dye layer are adjusted. By adjusting the color characteristics of the color filter by changing the area ratio with the formation area, the display color can be adjusted, so the display color can be adjusted effectively, and a very good color Reproducibility is obtained.

In addition, since the liquid crystal display device has a dye layer formation region and a dye layer non-formation region, the light obtained by transmitting the color filter twice in the reflection mode and the color filter once in the transmission mode are transmitted. Color transflective liquid crystal display device which can reduce the difference in color density from the light obtained by performing the same, and has good color development and high visibility in both the reflection mode and the transmission mode. Can be realized.
As a result, by using the above-described liquid crystal display device, a color transflective liquid crystal display device having very excellent display quality can be realized.

In order to achieve the above object, an electronic apparatus according to the present invention includes any one of the above liquid crystal display devices.
For example, the liquid crystal display device according to the present invention is used as a display device for various electronic devices such as various display devices such as a television and a monitor, a communication device such as a mobile phone and a PDA, or an information processing device such as a personal computer. it can.
According to such an electronic device, even if there is variation in the spectral characteristics of the illumination light, it is possible to compensate for this and realize a display with high color reproducibility, and an electronic device equipped with a liquid crystal display device having excellent visibility. Since it can be a device, it is particularly suitable for an electronic device that requires a high-quality display.

  Embodiments of the present invention will be described below with reference to the drawings. Such an embodiment shows one aspect of the present invention, and does not limit the present invention, and can be arbitrarily changed within the scope of the present invention.

<A: First Embodiment: Liquid Crystal Display>
First, a first embodiment in which the present invention is applied to a passive matrix type transflective liquid crystal display device will be described with reference to FIG. Note that, in FIG. 1 and each figure shown below, the scales are different for each layer and each member so that each layer and each member have a size that can be recognized on the drawing.

  As shown in FIG. 1, in this liquid crystal display device, a liquid crystal (liquid crystal layer) 4 is sandwiched between a first substrate (upper substrate) 3 and a second substrate (lower substrate) 2 bonded together through a sealing material 503. A liquid crystal display panel (liquid crystal panel) 500 having a configuration and an illumination device (so-called backlight unit) 5 disposed on the second substrate 2 side of the liquid crystal display panel 500 are included. In the following, as shown in FIG. 1, the side opposite to the illumination device 5 with respect to the liquid crystal display panel 500 is referred to as “observation side”. That is, the “observation side” is a side on which an observer who views an image displayed by the liquid crystal display device is located.

  The lighting device 5 includes a plurality of LEDs 621 (only one is shown in FIG. 1) and a light guide plate 622. Several LED621 is arrange | positioned so that the side end surface of the light-guide plate 622 may be opposed, and it irradiates light with respect to this side end surface. The light guide plate 622 is a plate-like member for uniformly guiding the light from the LEDs 621 incident on the side end surface to the substrate surface of the liquid crystal display panel 500 (the surface of the second substrate 2). In addition, on the surface of the light guide plate 622 facing the liquid crystal display panel 500, a diffusion plate or the like for uniformly diffusing the emitted light from the light guide plate 622 to the liquid crystal display panel 500 is attached. A reflective plate that reflects light directed from the light guide plate 622 toward the side opposite to the liquid crystal display panel 500 to the liquid crystal display panel 500 side is attached to the surface on the opposite side (not shown).

  Here, FIG. 2 is a graph illustrating the spectral characteristics (relationship between the wavelength of illumination light and the luminance) of illumination light emitted from the illumination device 5 to the liquid crystal display panel 500. That is, in the graph shown in FIG. 2, the horizontal axis indicates the wavelength, and the vertical axis indicates the relative luminance when the luminance of the illumination light at each wavelength is set to the reference value “1.00”. Shown as a value. As shown in this figure, in the present embodiment, it is assumed that the luminance of the illumination light varies over the wavelength in the visible light region, that is, the spectral characteristic of the illumination light is not uniform. Specifically, the illumination light in the present embodiment has the maximum luminance at a wavelength near 470 nm corresponding to blue light or green light, while the luminance at a wavelength of about 520 nm or more corresponding to yellow light or red light. It is weaker than Although the details will be described later, according to the liquid crystal display device according to the present embodiment, even when transmissive display is performed using illumination light having such a variation in spectral characteristics, the liquid crystal display panel 500 is viewed from the observation side. To achieve good color reproducibility by suppressing the influence of the dispersion of the spectral characteristics of the light emitted to the light (that is, the light that is visually recognized by the observer, hereinafter referred to as “observation light”). Can do. In the present embodiment, it is assumed that illumination light having the spectral characteristics shown in FIG. 2 is irradiated over the entire substrate surface of the liquid crystal display panel 500.

  In FIG. 1 again, the first substrate 3 and the second substrate 2 of the liquid crystal display panel 500 are plate-like members having optical transparency such as glass, quartz, and plastic.

A plurality of transparent electrodes 511 are formed on the inner surface (liquid crystal 4 side) surface of the first substrate 3. Each transparent electrode 511 is a strip-like electrode extending in a predetermined direction (left-right direction in FIG. 1), and is formed of a transparent conductive material such as ITO (Indium Tin Oxide). Furthermore, the surface of the first substrate 3 on which these transparent electrodes 511 are formed is covered with an alignment film 15. The alignment film 15 is an organic thin film such as polyimide, and is subjected to a rubbing process for defining the alignment direction of the liquid crystal 4 when no voltage is applied.
Further, on the outer surface side (outer surface) of the first substrate 3, a phase difference plate 17 and an upper polarizing plate 13 are provided on the first substrate 3 in this order.

On the other hand, a reflective layer (semi-transmissive reflective layer) 521 having a plurality of openings 521a (details will be described later) on the inner surface (liquid crystal 4 side) surface of the second substrate 2 has light reflectivity such as aluminum or silver. It is formed with the material which has. Incident light from the viewing side of the liquid crystal display panel 500 is reflected on the surface of the transflective layer 521 (more precisely, the surface other than the region where the opening 521a is formed) and is emitted to the viewing side. A reflective display is realized. The inner surface of the second substrate 2 is roughened to form a scattering structure (unevenness) on the surface of the transflective layer 521, but the illustration is omitted.
A quarter wavelength plate 18 and a lower polarizing plate 14 are provided on the outer surface side (outer surface) of the second substrate 2.

  Further, the inner surface of the second substrate 2 covered with the transflective layer 521 has color filters 522 (522R, 522G, 522B), a light shielding layer 523, and irregularities formed by the color filter 522 and the light shielding layer 523. An overcoat layer (planarization film) 524 for planarizing, a plurality of transparent electrodes 525, and an alignment film 9 similar to the alignment film 15 are formed.

  Each transparent electrode 525 is a strip-shaped electrode formed on the surface of the overcoat layer 524 with a transparent conductive material. Here, FIG. 3 schematically shows the positional relationship between the transparent electrode 511 (shown by a one-dot chain line) on the first substrate 3 and the transparent electrode 525 and the color filter 522 on the second substrate 2. It is shown. As shown in the figure, the transparent electrode 525 extends in a direction intersecting with the transparent electrode 511 (a direction perpendicular to the paper surface in FIG. 1). The alignment direction of the liquid crystal 4 sandwiched between the first substrate 3 and the second substrate 2 is changed by applying a voltage between the transparent electrode 511 and the transparent electrode 525. Hereinafter, as illustrated in FIG. 3, a region where the transparent electrode 511 and the transparent electrode 525 face each other is referred to as “sub-pixel 551 (551R, 551G, and 551B)”. In other words, the sub-pixel 551 can be said to be a minimum unit of a region where the alignment direction of the liquid crystal changes in response to application of voltage.

  The light shielding layer 523 is formed in a lattice shape so as to cover a gap between the subpixels 551 arranged in a matrix (that is, a region other than the region where the transparent electrode 511 and the transparent electrode 525 face each other). It plays the role of shielding the gaps between them. The color filter 522 is a layer formed of a resin material or the like corresponding to each sub-pixel 551. As shown in FIG. 3, R (red), G (green), and B (blue) are formed by dyes or pigments. One of them is colored. Hereinafter, the sub-pixels 551 corresponding to the color filters 522R, 522G, and 522B are referred to as sub-pixels 551R, 551G, and 551B, respectively. Then, a pixel (dot) 615 that is the minimum unit of the display image is formed by the three sub-pixels 551R, 551G, and 551B having different colors.

  Here, FIG. 4 shows the transmittance characteristics of the color filters 522R, 522G, and 522B, where the horizontal axis is the wavelength of the incident light to the color filter 522 and the vertical axis is the transmittance (the ratio of the emitted light amount to the incident light amount). It is a graph showing. As shown in the figure, the color filter 522R exhibits high transmittance for light having a wavelength of 600 nm or more corresponding to red, and the color filter 522G exhibits high transmittance for light having a wavelength of 500 to 600 nm corresponding to green. As shown, the color filter 522G exhibits high transmittance with respect to light having a wavelength of 400 to 500 nm corresponding to blue.

Next, with reference to FIG. 3 again, the mode of the opening 521a formed in the transflective layer 521 will be described.
First, each opening 521a is provided corresponding to the vicinity of the center of each sub-pixel 551 in the transflective layer 521. Illumination light from the illuminating device 5 is transmitted through the opening 521a and emitted to the observation side of the liquid crystal display panel 500, thereby realizing a transmissive display. Hereinafter, of the region occupied by the sub-pixel 551, a region corresponding to the opening 521a, that is, a region through which illumination light from the illumination device 5 is transmitted is referred to as a “translucent region (light transmission region)”.

  Further, each opening 521a formed in the semi-transmissive reflective layer 521 is arranged so that the areas of the light-transmitting regions are different from each other in each of the three sub-pixels 551R, 551G, and 551B constituting one pixel 615. The area is selected. More specifically, the area of the opening 521a corresponding to each of the sub-pixels 551R, 551G, and 551B is an area according to the spectral characteristics of the illumination light emitted from the illumination device 5.

  In the present embodiment, as shown in FIG. 2, among the illumination light emitted from the illumination device 5, the luminance at the wavelength from blue light to green light is high, and the luminance at the wavelength corresponding to red light is relatively high. It is low. Therefore, for the sub pixel 551G in which the green color filter 522G corresponding to the wavelength with the highest luminance is formed, the area of the opening 521a corresponding to this is compared with the sub pixels 551R and 551B corresponding to other colors. It is getting smaller. On the other hand, for the sub-pixel 551R in which the red color filter 522R corresponding to the wavelength with the lowest luminance of the illumination light is formed, the area of the opening 521a corresponding to the sub-pixel 551G and 551B of the other colors. It is bigger than that. FIG. 3 illustrates a case where the area ratio of the opening 521a corresponding to each of the sub-pixels 551R, 551G, and 551B is “sub-pixel 551R: 551G: 551B = 4: 1: 2”.

  Here, FIG. 5 is a graph showing the spectral characteristics of the observation light emitted from the liquid crystal display panel 500 to the observation side when transmissive display is performed with the configuration described above. On the other hand, in FIG. 6, a transmissive display was performed under a configuration in which the light-transmitting region has the same area over all the sub-pixels 551 (hereinafter referred to as “conventional configuration”) in comparison with FIG. The spectral characteristics of the observation light in the case are shown. In any of the figures, the spectral characteristics of the observation light when the transmissive display is performed using the illumination light having the spectral characteristics shown in FIG. 5 and 6, the horizontal axis indicates the wavelength, and the vertical axis indicates the luminance of each observation light with a predetermined luminance (the same luminance in both FIGS. 5 and 6). Is shown as a relative value when the reference value is “1.00”.

  As shown in FIG. 6, when the conventional configuration is adopted, the observation light visually recognized by the observer becomes light with extremely high luminance near the wavelength of 470 nm. Therefore, the image recognized by the observer becomes a blue-greenish image. On the other hand, when the configuration according to the present embodiment in which the ratio of the translucent regions in the sub-pixels 551R, 551G, and 551B is set to 4: 1: 2, as shown in FIG. 5, the observation light near the wavelength of 470 nm is used. The luminance is lower than that shown in FIG. Therefore, even when transmissive display is performed using illumination light having a luminance at a wavelength corresponding to blue or green that is stronger than the luminance at other wavelengths, the image visually recognized by the observer becomes bluish green. This situation can be avoided.

  As described above, according to the configuration of the present embodiment, the light having a relatively low luminance among the illumination light is sufficiently transmitted through the transflective layer 521, while the light having a relatively high luminance is transmitted. By limiting the transmission of the semi-transmissive reflective layer 521, it is possible to suppress the influence that the variation in the spectral characteristics of the illumination light may have on the observation light. That is, good color reproducibility can be realized by compensating for the non-uniformity of the spectral characteristics in the illumination light.

<B: Second Embodiment: Liquid Crystal Display>
Next, a second embodiment in which the present invention is applied to an active matrix type transflective liquid crystal display device will be described. In the following, a case where a TFD (Thin Film Diode) which is a two-terminal switching element is used as the switching element will be exemplified. Further, among the elements in the drawings shown below, the elements common to the elements shown in FIG. 1 are given the same reference numerals as those in FIG.

  First, FIG. 7 is a cross-sectional view schematically illustrating the configuration of the liquid crystal display device according to the present embodiment, and FIG. 8 is a perspective view illustrating the main configuration of the liquid crystal display panel included in the liquid crystal display device. is there. A sectional view taken along line AA 'in FIG. 8 corresponds to FIG. As shown in these drawings, on the inner surface of the first substrate 3, a plurality of pixel electrodes 513 arranged in a matrix and a gap portion between the pixel electrodes 513 in a predetermined direction (perpendicular to the paper surface in FIG. 7). A plurality of scanning lines 514 extending are formed. Each pixel electrode 513 is formed of a transparent conductive material such as ITO. Furthermore, each pixel electrode 513 and the scanning line 514 adjacent to the pixel electrode 513 are connected via a TFD 515. Each TFD 515 is a two-terminal switching element having nonlinear current-voltage characteristics.

  On the other hand, on the inner surface of the second substrate 2, as in the liquid crystal display device according to the first embodiment, a transflective layer 521 having a plurality of openings 521a, a color filter 522, a light shielding layer 523, and these And an overcoat layer 524 that covers the surface of the second substrate 2 on which is formed. Further, a plurality of data lines 527 extending in the direction intersecting with the scanning lines 514 are formed on the surface of the overcoat layer 524. As illustrated in FIGS. 7 and 8, each data line 527 is a strip-shaped electrode formed of a transparent conductive material. Here, FIG. 9 shows the positional relationship between each pixel electrode 513 (indicated by a one-dot chain line) and each data line 527. As shown in the figure, each data line 527 is opposed to a plurality of pixel electrodes 513 forming a column on the first substrate 3. Under such a configuration, a voltage is applied between the pixel electrode 513 on the first substrate 3 and the data line 527 on the second substrate 2, thereby changing the alignment state of the liquid crystal 4 sandwiched between both electrodes. . That is, in the present embodiment, the area where each pixel electrode 513 and each data line 527 face each other is a sub pixel 551 (more specifically, sub pixels 551R and 551G corresponding to the color filters 522R, 522G and 522B, respectively). And 551B).

As in the first embodiment, in this embodiment, as shown in FIG. 9, an opening 521a is formed at a position corresponding to the vicinity of the center of each sub-pixel 551 in the semi-transmissive reflective layer 521. . The area of each opening 521a is determined so that the ratio of the light-transmitting region in each of the sub-pixels 551R, 551G, and 551B is a ratio corresponding to the spectral characteristics of the illumination light from the illumination device 5. Yes. Here, also in the present embodiment, it is assumed that transmissive display is performed using illumination light having the spectral characteristics shown in FIG. Therefore, in the sub pixel 551G in which the green color filter 522G corresponding to the wavelength having the highest luminance among the illumination light is formed, the area of the opening 521a corresponding to the sub pixel 551R or 551B corresponding to the other color. Is smaller than the area of the opening 521a corresponding to. That is, the ratio of the light-transmitting area occupying the sub-pixel 551G is smaller than the ratio of the light-transmitting area occupying the sub-pixels 551R or 551B of other colors. On the other hand, for the sub-pixel 551R corresponding to the wavelength with the lowest luminance of the illumination light, the area of the opening 521a is large, and the ratio of the light-transmitting region in the sub-pixel 551R is the sub-pixel 551G of the other color. It is larger than 551B. In the example shown in FIG. 9, the case where the area ratio of the opening 521a corresponding to each of the sub-pixels 551R, 551G, and 551B is “4: 1: 2” is illustrated.
Also with this configuration, the same effect as in the first embodiment can be obtained.

<C: Third Embodiment: Liquid Crystal Display>
In the first and second embodiments, the opening 521a is provided in the vicinity of the center of the region corresponding to each sub-pixel 551 in the transflective layer 521, and the light-transmitting region is located at the center of each sub-pixel 551. The structure to perform was illustrated. On the other hand, in the present embodiment, the translucent area is an area along the edge of each sub-pixel 551.

  FIG. 10 is a cross-sectional view showing the configuration of the liquid crystal display device according to the present embodiment. 10 that are the same as those shown in FIG. 1 are given the same reference numerals. As shown in the figure, in the liquid crystal panel 500 according to the present embodiment, a color filter 522 (522R, 522G, and 522B), a light shielding layer 523, and an overcoat layer 524 are formed on the first substrate 3. The liquid crystal panel 500 is different from the liquid crystal panel 500 described in the above embodiments in that the transparent electrode 511 and the alignment film 15 are formed on the surface of the overcoat layer. Further, the transmittance characteristic of the color filter 522 in the present embodiment is different from the transmittance characteristic of the color filter 522 in each of the above-described embodiments shown in FIG.

  Here, FIG. 11 is a graph showing the transmittance characteristics of the color filters 522R, 522G and 522B in the present embodiment. As can be seen from a comparison of FIG. 4 with FIG. 4, the color purity of each color filter 522 according to this embodiment, particularly the color purity of the color filter 522G corresponding to green, is the color of the color filter 522 according to the above embodiment. It is higher than purity. More specifically, it is as follows.

  Here, the maximum transmittance of each color filter 522 in the wavelength range of 380 nm to 780 nm is Tmax, and the value Tmax / Tmin obtained by setting the minimum transmittance in the same wavelength range as Tmin is a parameter for evaluating color purity (that is, The higher the numerical value Tmax / Tmin, the higher the color purity). At this time, the numerical value Tmax / Tmin of the green color filter 522G shown in FIG. 4 is “1.8”, whereas the numerical value Tmax / Tmin of the color filter 522G according to the present embodiment is “8”. It can be seen that the color purity of the color filter 522G according to the present embodiment is significantly higher than the color purity of the color filter 522G according to the embodiment.

  In this embodiment, the transflective layer 528 is different from the first and second embodiments. That is, in the above embodiment, the shape of the transflective layer 521 (more specifically, the opening 521a in the transflective layer 521 is formed so that the region located at the center of each sub-pixel 551 becomes a translucent region. The configuration in which (shape) is selected is illustrated. On the other hand, in the present embodiment, a region along two opposing sides (two sides extending in the Y direction) among the four sides that define each of the substantially rectangular sub-pixels 551 is a translucent region. The shape of the transflective layer 528 is selected. Hereinafter, the specific shape of the transflective layer 528 will be described with reference to FIG.

  As shown in FIG. 12, the transflective layer 528 in the present embodiment has a plurality of portions extending in the Y direction on the second substrate 2. On the other hand, the transparent electrode 525 has the same shape as that shown in the above embodiment, but differs in that it is formed so as to cover the transflective layer 528. Thus, the transflective layer 528 in the present embodiment is formed in a stripe shape so as to correspond to each transparent electrode 525. In other words, it can be said that the transflective layer 528 is formed with a translucent portion (portion through which illumination light from the illumination device is transmitted) 528 a having a shape along the gap portion between the transparent electrodes 525. As a result of forming the translucent part 528a having such a shape with respect to the semi-transmissive reflective layer 528, as shown in FIG. 12, among the four sides that define the peripheral edge of each of the substantially rectangular sub-pixels 551, The region along the extending opposite side functions as a translucent region.

Also in this embodiment, as in the first and second embodiments, the area of the light-transmitting region occupying at least one sub-pixel 551 is different from the area of the light-transmitting region occupying the other sub-pixel 551. Thus, the shape of the transflective layer 528 is selected.
More specifically, as shown in FIG. 12, the width Wr of the reflective layer corresponding to the column of subpixels 551R and the width Wb of the reflective layer corresponding to the column of subpixels 551B are substantially equal, and The width Wb of the reflective layer corresponding to the column is wider than the width Wr and the width Wb. Therefore, the area Sr of the light-transmitting region occupying the sub-pixel 551R is substantially equal to the area Sb of the light-transmitting region occupying the sub-pixel 551B, and the area Sg of the light-transmitting region occupying the sub-pixel 551G is greater than the area Sr or the area Sb. Is also small. Here, it is assumed that the ratio of the area Sr, the area Sg, and the area Sb is “Sr: Sg: Sb = 1.5: 1: 1.5”.

  By the way, as shown in FIG. 4, the transmittance of the green color filter 522G shown in the above embodiment is significantly higher than the transmittance of the color filters 522R or 522B of other colors. Therefore, in order to perform ideal white display (that is, to compensate for color reproducibility) using the color filter 522 having the transmittance characteristics shown in FIG. 4, the area of the light transmitting region in the green sub-pixel 551G. Needs to be significantly smaller than the area of the light-transmitting region occupied by the sub-pixels 551R or 551B of the other colors. On the other hand, the color filter 522G whose transmittance characteristics are shown in FIG. 11 has a lower transmittance than the color filter 522G shown in FIG. 4, and therefore the area of the light-transmitting region in the green sub-pixel 551G. Therefore, it is not necessary to ensure the difference between the area of the light-transmitting region occupying the sub-pixels 551R or 551B of the other colors as large as when the color filter 522 shown in FIG. 4 is used. That is, by using the color filter 522G whose transmittance characteristics are shown in FIG. 11, it is not necessary to reduce the area of the light transmitting region in the green sub-pixel 551G so much.

  Here, FIG. 13 is a CIE chromaticity diagram showing a color chart of colors displayed by the liquid crystal display device according to the present embodiment. In FIG. 13, color coordinates of colors displayed by a liquid crystal display device having a conventional configuration are shown as a comparison of the present embodiment. Note that the “conventional configuration” liquid crystal display device is a liquid crystal display device having a configuration in which the color filter whose transmittance characteristics are shown in FIG. 13 is used and the area of the light-transmitting region is the same for all the sub-pixels. .

  In the CIE chromaticity diagram, the color coordinates when ideal white display is performed are approximately (x, y) = (0.310, 0.316), and this point is indicated by “x” in FIG. It is shown. As is clear from the figure, the color coordinates when the white display is performed by the liquid crystal display device according to the present embodiment are compared with the color coordinates when the white display is performed by the liquid crystal display device of the conventional configuration. Approaching the ideal white display color coordinates. That is, according to the liquid crystal display device according to the present embodiment, it can be said that good color reproducibility is realized.

  Also in the present embodiment, as in the above-described embodiments, an effect that favorable color reproducibility is realized while suppressing the influence that the variation in the spectral characteristics of the illumination light may have on the observation light can be obtained.

  As shown in the present embodiment and each of the above embodiments, in the present invention, the ratio of the light-transmitting area occupying any of the sub-pixels constituting the pixel and the light-transmitting ratio occupied by other sub-pixels constituting the pixel As long as the ratio of the regions is different, the mode of the light-transmitting region in each sub-pixel, that is, the mode of the light-transmitting portion (opening portion 521a or light-transmitting portion 528a) in the semi-transmissive reflective layer 521 is arbitrary. Good. In addition, the “translucent portion” in the present invention means “a portion of the transflective layer that transmits the illumination light from the illumination device”, and an opening (that is, a hole) formed in the transflective layer. It is not limited.

<D: Modification>
Although one embodiment of the present invention has been described above, the above embodiment is merely an example, and various modifications can be made to the above embodiment without departing from the spirit of the present invention. As modifications, for example, the following can be considered.

<D-1: Modification 1>
In the first and second embodiments, the areas of the openings 521a corresponding to the sub-pixels 551 are made different according to the spectral characteristics of the illumination light from the illumination device 5, but as follows. Also good. That is, as shown in FIG. 14, the area of each opening 521a provided in the transflective layer 521 is substantially the same, while the number of openings 521a provided corresponding to each sub-pixel 551 is set to The number is determined according to the spectral characteristics.

  For example, in each of the above embodiments, the area ratio of the openings 521a corresponding to the sub-pixels 551R, 551G, and 551B is set to “4: 1: 2” in accordance with the spectral characteristics of the illumination light shown in FIG. However, in this modification, as shown in FIG. 14, the ratio of the number of openings 521a corresponding to the sub-pixels 551R, 551G, and 551B is set to “4: 1: 2”. Even in this configuration, the same effects as those of the above embodiments can be obtained. Furthermore, as shown in the above embodiments, when the opening 521a is formed corresponding to only a part of each sub-pixel 551, the position of each opening 521a is biased in each sub-pixel 615. However, according to the configuration shown in this modification, the openings 521a can be scattered in each sub-pixel 551, so that such a problem is avoided. There is an advantage that you can.

<D-2: Modification 2>
In each of the above embodiments, the ratio of the light-transmitting area in the sub-pixel 551 is made different for each sub-pixel 551 corresponding to the same color. If the spectral characteristics of the illumination light from the illumination device 5 are the same over the entire substrate surface of the liquid crystal display panel 500, even if such a configuration is adopted, the non-uniformity of the spectral characteristics of the illumination light is sufficiently compensated. It is possible. However, the spectral characteristics of the illumination light from the illumination device 5 may be different at each location in the substrate surface. For example, the illumination light having the spectral characteristic shown in FIG. 2 is irradiated to a certain part in the substrate surface, but the illumination light having the spectral characteristic different from that shown in FIG. 2 is irradiated to the other part. And so on. In such a case, the ratio of the light-transmitting regions may be varied depending on the position of each sub-pixel 551 in the substrate surface (that is, the area of the opening 521a may be varied). For example, in the pixel 615 located at the location irradiated with illumination light having the spectral characteristics shown in FIG. 2, the area ratio of the light-transmitting regions in the sub-pixels 551R, 551G, and 551B is “4: 1: 2”. On the other hand, in the pixel 615 where the illumination light having a slightly lower luminance from blue light to green light than the illumination light is irradiated, the area ratio of the translucent regions in the sub-pixels 551R, 551G, and 551B is set. For example, “3: 1: 2”. As described above, the ratio of the translucent regions in the sub-pixels 551 corresponding to the same color is not necessarily the same over all the sub-pixels 551. According to this modification, in addition to the effects shown in the above embodiments, even when the spectral characteristics of the illumination light are non-uniform in the substrate surface, this can be compensated for, so that the color reproducibility can be more reliably achieved The effect that can be improved is obtained.

<D-3: Modification 3>
In each of the above-described embodiments, the case where the illumination light from the illumination device exhibits the spectral characteristics shown in FIG. 2 is illustrated, but it goes without saying that the spectral characteristics of the illumination light are not limited to this. That is, even when illumination light having a spectral characteristic different from that in FIG. 2 is used for transmissive display, for example, the area of the light-transmitting region in the sub-pixel of the color corresponding to the wavelength with high luminance in the illumination light is expressed as luminance. If the area is set according to the spectral characteristics of the illumination light, such as when the area is smaller than the area of the light-transmitting region in the sub-pixel of the color corresponding to the low wavelength, the dispersion of the spectral characteristics of the illumination light is compensated for and good An effect that color reproducibility can be realized can be obtained.

  Furthermore, the area of the translucent region in each sub-pixel does not necessarily correspond to the spectral characteristics of the illumination light. For example, regardless of the spectral characteristics of the illumination light, the area of the light-transmitting region in the subpixel 551G corresponding to green or the subpixel 551B corresponding to blue (that is, the area of the opening 521a corresponding to these subpixels 551). Is made larger than the area of the translucent region in the sub-pixel 551R corresponding to red, the display can be intentionally bluish-green. That is, in the present invention, the area of the opening 521a in the transflective layer 521 is selected so that the area of the light-transmitting region in one sub-pixel 551 is different from the area of the light-transmitting region in the other sub-pixel 551. It only has to be.

<D-4: Modification 4>
In the said 3rd Embodiment, although the area | region along two opposite sides among four sides which demarcate each sub pixel was illustrated as a translucent area | region, 1 side, 3 sides, or these 4 sides are mentioned. The shape of the transflective layer 528 may be selected so that the region along all the sides (four sides) becomes a light transmitting region. That is, when the light-transmitting region is a region along the edge of the sub-pixel, a region along at least one side of the plurality of sides that define each sub-pixel may be set as the light-transmitting region. In the third embodiment, the transflective layer 528 having a shape extending over the plurality of subpixels 551 is illustrated, but the transflective layer 528 may be separated from each subpixel 551.

<D-5: Modification 5>
In each of the above-described embodiments, the case where the stripe arrangement in which the color filters 522 of the same color are arranged in a row is exemplified. However, as the arrangement of the color filters 522, a mosaic arrangement or a delta arrangement is also adopted. You can also

  In each of the above embodiments, the case where the transflective layer 521 is formed on the inner surface of the second substrate 2 is exemplified. However, it is also conceivable to form a reflective layer on the outer surface of the second substrate 2. In short, it is sufficient if the transflective layer 521 is located on the opposite side of the liquid crystal 4 from the observation side.

<D-6: Modification 6>
In the second embodiment, the active matrix type liquid crystal display device adopting TFD515 as the switching element has been exemplified. However, the application range of the present invention is not limited to this, and is represented by a TFT (Thin Film Transistor). The present invention can also be applied to a liquid crystal display device employing a three-terminal switching element. When a TFT is used, a counter electrode is formed over the entire surface of one substrate, and a plurality of scanning lines and a plurality of data lines are formed on the other substrate so as to extend in directions crossing each other. At the same time, pixel electrodes connected to both of these via TFTs are arranged in a matrix. In this case, a region where each pixel electrode and the counter electrode face each other functions as a sub pixel.

<D-7: Modification 7>
In each of the above embodiments, the case where the transflective layer 521 and the transparent electrode 525 (the data line 527 in the second embodiment) are separately formed is illustrated, but an electrode for applying a voltage to the liquid crystal 4 May be formed of a conductive material having light reflectivity, and this electrode may also have a function as the transflective layer 521. That is, instead of providing the transflective layer 521 shown in FIG. 1, instead of the transparent electrode 525, a reflective electrode having the same shape as this is provided. In this case, a part of the region corresponding to each sub-pixel in the reflective electrode (that is, a region facing the transparent electrode 511 on the first substrate 3) is a part of the aspect exemplified in each of the above embodiments and each modification. An opening will be provided.

<E: Fourth Embodiment: Liquid Crystal Display>
FIG. 15 is a view showing an example of the liquid crystal display device of the present invention, and is a portion showing an example of a passive matrix type transflective color liquid crystal display device in which a color filter is provided on the inner surface side of the lower substrate. It is sectional drawing. FIG. 16 is a diagram showing only the transflective layer, the color filter, and the light shielding film in the liquid crystal display device shown in FIG. 15, and FIG. 16A shows the overlap of the transflective layer and the color filter. FIG. 16B is a cross-sectional view taken along the line AA ′ shown in FIG.
In the following drawings, the film thicknesses and dimensional ratios of the respective components are appropriately changed in order to make the drawings easy to see.

The liquid crystal display device shown in FIG. 15 includes a liquid crystal panel (liquid crystal display panel) 1 and a backlight (illumination device) 5 disposed on the rear surface side (the outer surface side of the lower substrate 2) of the liquid crystal panel 1. It is roughly structured.
In addition, the liquid crystal panel 1 is schematically configured such that a liquid crystal layer 4 made of STN (Super Twisted Nematic) liquid crystal or the like is sandwiched in a space sandwiched between a lower substrate 2 and an upper substrate 3 that are arranged to face each other.

The lower substrate 2 is made of glass, resin, or the like. A transflective layer 6 is provided on the inner surface side of the lower substrate 2, and a color filter 10 is laminated on the upper side of the transflective layer 6, A light shielding film 41 made of a black resin material or the like is provided between the dye layers 11R, 11G, and 11B constituting the color filter 10. Further, a transparent flattening film 12 for flattening the unevenness formed by the color filter 10 is laminated on the color filter 10. Further, a striped transparent electrode (segment electrode) 8 made of a transparent conductive film such as indium tin oxide (hereinafter abbreviated as “ITO”) is provided on the planarizing film 12 in the direction perpendicular to the paper surface. An alignment film 9 made of polyimide or the like is provided on the upper side of the transparent electrode 8 so as to cover the transparent electrode 8.
Further, a quarter wavelength plate 18, a lower polarizing plate 14, and a reflective polarizer 19 are provided on the outer surface side of the lower substrate 2.

On the other hand, the upper substrate 3 is made of glass or resin, and a striped transparent electrode (common electrode) 7 made of a transparent conductive film such as ITO is formed on the lower substrate 2 on the inner surface side of the upper substrate 3. An alignment film 15 made of polyimide or the like is provided on the lower side of the transparent electrode 7 so as to cover the transparent electrode 7.
On the outer surface side of the upper substrate 3, a front scattering plate 16, a phase difference plate 17, and an upper polarizing plate 13 are stacked on the upper substrate 3 in this order.

  In addition, a reflective plate 51 is provided on the lower surface side of the backlight 5 (the side opposite to the liquid crystal panel 1).

Next, planar overlap of the transflective layer 6 and the color filter 10 in the liquid crystal display device shown in FIG. 15 will be described.
The transflective layer 6 is made of a highly reflective metal film such as aluminum, and is formed by opening the metal film in a window shape as shown in FIG. Each pixel has a light transmission region 6a that transmits light incident from the upper substrate 3 side and a light reflection region 6b that reflects light incident from the upper substrate 3 side.

  On the other hand, the color filter 10 is provided corresponding to each pixel constituting the display region, and the red layer 11R, the green layer 11G, and the blue layer are orthogonal to the transparent electrode 7 provided on the upper substrate 3 described above. 11B extends in the direction perpendicular to the paper surface, and has a dye layer 11 repeatedly arranged in the order of a red layer 11R, a green layer 11G, and a blue layer 11B.

  As shown in FIG. 16, each of the dye layers 11R, 11G, and 11B has a window-like opening in the entire region that overlaps the light transmission region 6a of the transflective layer 6 and the dye layers 11R, 11G, and 11B. By doing so, it is provided in a region excluding a part of the region overlapping the light reflection region 6b of the transflective layer 6 in plan view. As a result, the color filter 10 is a part of the dye layer forming region where the dye layers 11R, 11G, and 11B are provided, and a region overlapping the light reflecting region 6b in a plan view. Dye layer non-formation regions 11D, 11E, and 11F, which are regions where 11G and 11B are not provided, exist. In this liquid crystal display device, the area of the dye layer forming region, that is, the area of each of the dye layers 11R, 11G, and 11B is provided so as to decrease in the order of the red layer 11R, the blue layer 11B, and the green layer 11G. Yes.

In such a liquid crystal display device, as shown in FIG. 15, the external light 30a incident on the liquid crystal display device from the upper substrate 3 side in the reflection mode is transmitted through the color filter 10 and the light reflection region of the semi-transmissive reflection layer 6 The light is reflected by 6b, passes through the color filter 10 again, and is emitted outward from the upper substrate 3 side. The external light 30b incident on the liquid crystal display device from the upper substrate 3 side in the reflection mode is reflected by the light reflection region 6b without passing through the color filter 10, and is emitted outward from the upper substrate 3 side. Since the external light 30c incident on the liquid crystal display device from the upper substrate 3 side in the reflection mode passes through the light transmission region 6a, it does not become reflected light.
That is, the reflected light includes light 30a that passes through the dye layers 11R, 11G, and 11B and light 30b that passes through the dye layer non-formation regions 11D, 11E, and 11F, and passes through the dye layers 11R, 11G, and 11B. Only the light 30a is colored, and the light 30b transmitted through the pigment layer non-forming regions 11D, 11E, and 11F is not colored.

  Therefore, the light emitted from the upper substrate 3 side in the reflection mode to the outside passes through the colored light 30a transmitted through the dye layers 11R, 11G, and 11B and the dye layer non-formation regions 11D, 11E, and 11F. The light is combined with the uncolored light 30b.

Further, the light 50 a incident on the liquid crystal display device from the backlight 5 in the transmission mode is transmitted through the light transmission region 6 a and is transmitted through the pigment layer 11 of the color filter 10 and is colored. In addition, the light 50 b incident on the liquid crystal display device from the backlight 5 in the transmissive mode is shielded by the transflective layer 6.
Therefore, the light emitted outward from the upper substrate 3 side in the transmission mode is colored light 50a that has been transmitted once through the dye layer 11 of the color filter 10.

  Since such a liquid crystal display device includes the dye layer non-formation regions 11D, 11E, and 11F in a part of the region that overlaps the light reflection region 6b in a plan view, as described above, the light obtained in the reflection mode is the dye The light is a combination of the uncolored light 30b transmitted through the layer non-formation regions 11D, 11E, and 11F and the colored light 30a transmitted through the dye layer 11. On the other hand, the light obtained in the transmission mode is only the colored light 50a that passes through the dye layer 11.

Thus, the difference in color density between the light obtained by passing through the color filter 10 twice in the reflection mode and the light obtained by passing through the color filter 10 once in the transmission mode can be reduced. .
As a result, it is possible to realize a color transflective liquid crystal display device that is bright and capable of displaying with high visibility similarly in the reflection mode and the transmission mode. In addition, in the liquid crystal display device shown in FIG. 15, the dye layer 11 includes a red layer 11R, a green layer 11G, and a blue layer 11B. The areas of the dye layers 11R, 11G, and 11B are the red layer 11R, Blue layer 11B and green layer 11G are provided so as to decrease in order, and the color characteristics of the color filter 10 are further adjusted by changing the areas of the dye layers 11R, 11G, and 11B. Thus, a liquid crystal display device having better display quality can be realized.

  Further, in the liquid crystal display device shown in FIG. 15, the transparent film 12 for flattening the step between the region where the respective dye layers 11R, 11G, and 11B are provided and the dye layer non-formation regions 11D, 11E, and 11F is provided. Therefore, it is possible to prevent an adverse effect caused by a step between the region where the respective dye layers 11R, 11G, and 11B are provided and the non-dye layer forming regions 11D, 11E, and 11F from occurring. Reliability can be improved.

  In addition, the transflective layer made of a thin metal film has light absorption in addition to light reflection and transmission, whereas the liquid crystal display device shown in FIG. Since the light-transmitting region 6a is formed by opening in the shape of a window, it does not absorb light, and the reflectance and transmittance can be increased.

<F: Fifth Embodiment: Liquid Crystal Display>
In the fifth embodiment, the overall configuration of the liquid crystal display device is the same as that of the fourth embodiment shown in FIG.
Further, since the liquid crystal display device of the fifth embodiment is different from the liquid crystal display device of the fourth embodiment only in the shapes of the transflective layer and the color filter, the transflective layer and the color filter are illustrated in FIG. Will be described in detail.
FIG. 17 is a diagram showing only the transflective layer, the color filter, and the transparent electrode of the lower substrate in the liquid crystal display device of the fifth embodiment, and FIG. 17 (A) shows the transflective layer and the color filter. It is a top view for demonstrating overlap, FIG.17 (B) is sectional drawing which follows the CC 'line | wire shown to FIG. 17 (A).
In FIG. 17, the same reference numerals are given to the same components as those in the fourth embodiment.

  Similar to the transparent electrode 8 provided on the lower substrate 2, the semi-transmissive reflective layer 61 is provided so as to extend in a stripe shape in the direction perpendicular to the paper surface so as to be orthogonal to the transparent electrode 7 provided on the upper substrate 3. And formed at the same pitch as the transparent electrodes 8 provided on the lower substrate 2. Then, as shown in FIG. 17B, the width of the pattern of the transparent electrode 8 provided on the lower substrate 2 is formed larger than the width of the pattern of the metal film constituting the transflective layer 61. As a result, the band-shaped region where the metal film constituting the transflective layer 61 and the transparent electrode 8 do not overlap in plane is the light transmission region 61a, and the entire region where the metal film is provided is the light reflection region. 61b.

  On the other hand, as in the fourth embodiment, the color filter 101 is provided corresponding to each pixel constituting the display region, and the red layer 111R and the green color are arranged so as to be orthogonal to the transparent electrode 7 provided on the upper substrate 3. The layer 111G and the blue layer 111B extend in the direction perpendicular to the paper surface, and have the dye layer 111 that is repeatedly arranged in the order of the red layer 111R, the green layer 111G, and the blue layer 111B.

As shown in FIG. 17, each of the dye layers 111R, 111G, and 111B has an opening in a stripe shape in the entire region that overlaps the light transmission region 61a of the transflective layer 61 and the dye layers 111R, 111G, and 111B. By doing so, the transflective layer 61 is provided in a region excluding a part of the region overlapping the light reflection region 61b in a plane.
As a result, the color filter 101 is a part of the dye layer forming region where the dye layers 111R, 111G, and 111B are provided, and a region overlapping the light reflection region 61b in a plan view. Dye layer non-formation regions 111D, 111E, and 111F, which are regions where 111G and 111B are not provided, exist. Further, in this liquid crystal display device, as in the fourth embodiment, the area of the dye forming region, that is, the area of each of the dye layers 111R, 111G, and 111B is the red layer 111R, the blue layer 111B, and the green layer 111G in this order. It is provided to be smaller.

  In such a liquid crystal display device, as in the fourth embodiment, the dye layer non-formation regions 111D, 111E, and 111F are formed in a part of the region overlapping the light reflection region 61b of the transflective layer 61 in a plane. Therefore, some of the external light incident on the liquid crystal display device in the reflection mode is transmitted through the dye layer non-formation regions 111D, 111E, and 111F, and is transmitted through the color filter 101 twice in the reflection mode. The light obtained by the above is a combination of uncolored light that passes through the dye layer non-forming regions 111D, 111E, and 111F and colored light that passes through the dye layer 111. On the other hand, all the light incident from the backlight 5 and transmitted through the light transmission region 61a in the transmission mode is transmitted through the dye layer 111, and the light obtained by transmitting the color filter 101 once in the transmission mode is obtained. , All become colored light. Thus, the difference in color density between the light obtained by passing through the color filter twice in the reflection mode and the light obtained by passing through the color filter once in the transmission mode can be reduced.

As a result, it is possible to realize a color transflective liquid crystal display device that has a good color and can display with high visibility in the reflection mode and the transmission mode.
Moreover, also in the liquid crystal display device of the present embodiment, the dye layer 111 includes a red layer 111R, a green layer 111G, and a blue layer 111B, and the areas of the dye layers 111R, 111G, and 111B are the red layer 111R and the blue layer, respectively. The layer 111B and the green layer 111G are provided so as to decrease in order, and the color characteristics of the color filter 101 are adjusted by changing the areas of the dye layers 111R, 111G, and 111B, thereby further improving the color reproducibility. The liquid crystal display device which can be improved and has more excellent display quality is realizable.

  In such a liquid crystal display device, the transflective layer 61 has a pattern width of the transparent electrode 8 provided on the lower substrate 2 rather than the width of the pattern of the metal film constituting the transflective layer 61. Since the band-shaped light transmission region 61a and the light reflection region 61b are formed by forming a larger one, the opening portion is formed in comparison with the transflective layer having an opening portion in a window shape. Since there is no variation in the length direction, the production is stable.

<G: Sixth Embodiment: Liquid Crystal Display>
FIG. 18 is a diagram showing another example of the liquid crystal display device of the present invention, showing an example of a passive matrix transflective color liquid crystal display device in which a color filter is provided on the inner surface side of the upper substrate. FIG. FIG. 19 is a diagram showing only the transflective layer and the color filter in the liquid crystal display device shown in FIG. 18, and FIG. 19A explains the overlap between the transflective layer and the color filter. FIG. 19B is a cross-sectional view taken along line BB ′ shown in FIG. 19A.
In FIG. 18 and FIG. 19, the same reference numerals are given to the same components as those in the fourth embodiment, and detailed description thereof will be omitted.

The liquid crystal display device shown in FIG. 18 is roughly configured to include a liquid crystal panel 100 and a backlight (illumination device) 5 disposed on the rear surface side (the outer surface side of the lower substrate 2) of the liquid crystal panel 100. Yes.
Similarly to the fourth embodiment, the liquid crystal panel 100 has a schematic configuration in which the liquid crystal layer 4 is sandwiched in a space sandwiched between the lower substrate 2 and the upper substrate 3 that are arranged to face each other.

A transflective layer 6 and an insulating film 23 are laminated in this order on the inner surface side of the lower substrate 2, and a striped transparent electrode 8 (here, made of a transparent conductive film such as ITO) is laminated on the upper side of the insulating film 23. The common electrode) extends in the horizontal direction in the figure, and an alignment film 9 is provided above the transparent electrode 8 so as to cover the transparent electrode 8.
Further, on the outer surface side of the lower substrate 2, as in the fourth embodiment, a quarter-wave plate 18, a lower polarizing plate 14, and a reflective polarizer 19 are provided.

On the other hand, a color filter 20 is laminated on the inner surface side of the upper substrate 3, and a light shielding film 42 made of a black resin material or the like is provided between the dye layers 21 R, 21 G, and 21 B constituting the color filter 20. . A transparent flattening film 22 for flattening the unevenness formed by the color filter 20 is laminated below the color filter 20. Further, on the lower side of the planarizing film 22, a striped transparent electrode 7 (here, a segment electrode) made of a transparent conductive film such as ITO is perpendicular to the transparent electrode 8 provided on the lower substrate 2 (paper surface). An alignment film 15 is provided on the lower side of the transparent electrode 7 so as to cover the transparent electrode 7.
Further, on the outer surface side of the upper substrate 3, as in the fourth embodiment, a front scattering plate 16, a phase difference plate 17, and an upper polarizing plate 13 are stacked on the upper substrate 3 in this order. ing.

  Further, a reflective plate 51 is provided on the lower surface side of the backlight 5 (the side opposite to the liquid crystal panel 1), as in the fourth embodiment.

Next, planar overlap of the transflective layer and the color filter in the liquid crystal display device shown in FIG. 18 will be described. The liquid crystal display device shown in FIG. 18 differs from the liquid crystal display device according to the fourth embodiment shown in FIG. 15 in the position where the color filters are arranged. The overlapping is the same as in the fourth embodiment.
The transflective layer 6 is the same as that of the fourth embodiment, and is formed by opening a metal film in a window shape as shown in FIG. 19, and the light transmissive region 6a and the light reflective region 6b are formed in each pixel. Have every.

  On the other hand, in the color filter 20, the red layer 21R, the green layer 21G, and the blue layer 21B extend in the direction perpendicular to the paper surface so as to be orthogonal to the transparent electrode 8 provided on the lower substrate 2, and the red layer 21R, the green layer The pigment layer 21 is repeatedly arranged in the order of 21G and the blue layer 21B.

  As shown in FIG. 19, each of the dye layers 21R, 21G, and 21B has a window-like opening in the entire area that overlaps the light transmission area 6a of the semi-transmissive reflective layer 6 and the dye layers 21R, 21G, and 21B. By doing so, it is provided in a region excluding a part of the region overlapping the light reflection region 6b of the transflective layer 6 in plan view. Accordingly, the color filter 20 is a part of the dye layer forming region where the dye layer 21 is provided and a part of the region overlapping the light reflecting region 6b in a plan view, and the dye layers 21R, 21G, and 21B are provided. Dye layer non-formation regions 21D, 21E, and 21F that are not formed are present. Also in this liquid crystal display device, as in the fourth embodiment, the area of the dye forming region, that is, the area of each of the dye layers 21R, 21G, and 21B is in the order of the red layer 21R, the blue layer 21B, and the green layer 21G. It is provided to be smaller.

  Also in such a liquid crystal display device, as shown in FIG. 18, in the reflection mode, the light emitted from the upper substrate 3 side toward the outside is the light 30a and the dye layer that pass through the dye layers 21R, 21G, and 21B. Light 30b that passes through the non-formation regions 21D, 21E, and 21F, and only the light 30a that passes through each of the dye layers 21R, 21G, and 21B is colored, and the light 30b that passes through the dye layer non-formation regions 21D, 21E, and 21F Is not colored. Therefore, also in such a liquid crystal display device, as in the fourth embodiment, the light emitted outward from the upper substrate 3 side in the reflection mode is a combination of the uncolored light 30b and the colored light 30b. Light.

  On the other hand, the light emitted toward the outside from the upper substrate 3 side in the transmission mode is also colored light 50a that has been transmitted once through the dye layer 21 of the color filter 20, as in the fourth embodiment.

As a result, also in the liquid crystal display device of the present embodiment, the light obtained by transmitting twice through the color filter 20 in the reflection mode and the light obtained by transmitting once through the color filter 20 in the transmission mode. The difference in color density can be reduced.
As a result, it is possible to realize a color transflective liquid crystal display device that has a good color and can display with high visibility in the reflection mode and the transmission mode.

  In addition, also in the liquid crystal display device shown in FIG. 19, the dye layer 21 includes a red layer 21R, a green layer 21G, and a blue layer 21B. The areas of the dye layers 21R, 21G, and 21B are the red layer 21R, It is provided so that the blue layer 21B and the green layer 21G become smaller in this order, and the color characteristics of the color filter 20 are further adjusted by changing the areas of the dye layers 21R, 21G, and 21B. Thus, a liquid crystal display device having better display quality can be realized.

<H: Seventh Embodiment: Liquid Crystal Display>
FIG. 20 is a diagram showing another example of the liquid crystal display device of the present invention, which is an example of a passive matrix type transflective color liquid crystal display device in which a transparent electrode is directly provided on a transflective layer. It is the fragmentary sectional view shown. FIG. 21 is a diagram showing only the transflective layer, the color filter, and the transparent electrode of the lower substrate in the liquid crystal display device shown in FIG. 20, and FIG. 21A shows the transflective layer and the color filter. FIG. 21B is a cross-sectional view taken along the line DD ′ shown in FIG. 21A.
20 and 21, the same reference numerals are given to the same components as those in the fourth embodiment, and detailed description thereof is omitted.

The liquid crystal display device shown in FIG. 20 is roughly configured to include a liquid crystal panel 200 and a backlight (illumination device) 5 disposed on the rear surface side (the outer surface side of the lower substrate 2) of the liquid crystal panel 200. Yes.
Similarly to the fourth embodiment, the liquid crystal panel 200 is schematically configured in such a manner that the liquid crystal layer 4 is sandwiched in a space sandwiched between the lower substrate 2 and the upper substrate 3 that are arranged to face each other.

On the inner surface side of the lower substrate 2, a transflective layer 62 made of a metal film having a high reflectivity such as aluminum and a transparent conductive film such as ITO are formed in a stripe shape directly provided on the transflective layer 62. A transparent electrode 8 (here, a segment electrode) extends in the direction perpendicular to the paper surface, and an alignment film 9 is provided above the transparent electrode 8 so as to cover the transparent electrode 8.
Further, on the outer surface side of the lower substrate 2, as in the fourth embodiment, a quarter-wave plate 18, a lower polarizing plate 14, and a reflective polarizer 19 are provided.

On the other hand, a color filter 104 is laminated on the inner surface side of the upper substrate 3, and a light shielding film 43 is provided between the dye layers 114 </ b> R, 114 </ b> G, and 114 </ b> B constituting the color filter 104. A transparent flattening film 32 for flattening the unevenness formed by the color filter 104 is laminated below the color filter 104. Further, on the lower side of the planarizing film 32, a striped transparent electrode 7 (in this case, a common electrode) made of a transparent conductive film such as ITO is perpendicular to the transparent electrode 8 provided on the lower substrate 2 (illustrated). An alignment film 15 is provided on the lower side of the transparent electrode 7 so as to cover the transparent electrode 7.
Further, on the outer surface side of the upper substrate 3, as in the fourth embodiment, a front scattering plate 16, a phase difference plate 17, and an upper polarizing plate 13 are stacked on the upper substrate 3 in this order. ing.

  Further, a reflective plate 51 is provided on the lower surface side of the backlight 5 (the side opposite to the liquid crystal panel 1), as in the fourth embodiment.

Next, planar overlap of the transflective layer and the color filter in the liquid crystal display device shown in FIG. 20 will be described.
The semi-transmissive reflective layer 62 is formed at the same pitch as the transparent electrodes 8 provided on the lower substrate 2 as in the fifth embodiment, and the semi-transmissive reflective layer 62 is formed as shown in FIG. The width of the pattern of the transparent electrode 8 provided on the lower substrate 2 is formed to be larger than the width of the pattern of the metal film constituting the metal film and the transparent electrode 8 constituting the transflective layer 62. A band-shaped region that does not overlap with each other in plan view is a light transmission region 62a, and an entire region where the metal film is provided is a light reflection region 62b.

  On the other hand, similarly to the fourth embodiment, the color filter 104 is provided corresponding to each pixel constituting the display area, and the red layer 114R and the green color are arranged so as to be orthogonal to the transparent electrode 7 provided on the upper substrate 3. The layer 114G and the blue layer 114B extend in the direction perpendicular to the paper surface, and have a dye layer 114 that is repeatedly arranged in the order of a red layer 114R, a green layer 114G, and a blue layer 114B.

  As shown in FIG. 21, the green layer 114G is formed by opening the green layer 114G in a stripe shape and the entire region overlapping the light transmission region 62a of the transflective layer 62 in a plane. It is provided in a region excluding a part of the region overlapping with the light reflection region 62b in plan view. As a result, the color filter 104 is provided with a green layer 114G, which is a part of a region that overlaps the light reflection region 62b in a planar manner with the dye layer forming region where the respective dye layers 114R, 114G, and 114B are provided. There is a dye layer non-formation region 114E which is a region not formed. In this liquid crystal display device, the area of the dye forming region, that is, the area of each of the dye layers 114R, 114G, and 114B is provided so that the green layer 114G is smaller than the red layer 114R and the blue layer 114B. Yes.

  Also in such a liquid crystal display device, as shown in FIG. 20, in the reflection mode, the light emitted from the upper substrate 3 side toward the outside is the light 30a that passes through the dye layers 114R, 114G, and 114B and the dye layer. There is light 30b that passes through the non-formation region 114E, only the light 30a that has passed through each of the dye layers 114R, 114G, and 114B is colored, and the light 30b that has passed through the dye layer non-formation region 114E is not colored. Therefore, also in such a liquid crystal display device, as in the fourth embodiment, the light emitted outward from the upper substrate 3 side in the reflection mode is a combination of the uncolored light 30b and the colored light 30b. Light.

  On the other hand, the light emitted outward from the upper substrate 3 side in the transmission mode is also colored light 50a that has been transmitted once through the dye layer 114 of the color filter 104, as in the fourth embodiment.

Accordingly, also in the liquid crystal display device of the present embodiment, the light obtained by transmitting the color filter 104 twice in the reflection mode and the light obtained by transmitting the color filter 104 once in the transmission mode. The difference in color density can be reduced.
As a result, it is possible to realize a color transflective liquid crystal display device that has a good color and can display with high visibility in the reflection mode and the transmission mode.

  In the liquid crystal display device of this embodiment, the dye layer 114 includes a red layer 114R, a green layer 114G, and a blue layer 114B. The areas of the dye layers 114R, 114G, and 114B are the red layer 114R and the blue layer 114B. The green layer 114G is provided to be smaller than the layer 114B, and the color reproducibility can be further improved by adjusting the color characteristics of the color filter 104 by changing the area of the green layer 114G. Thus, a liquid crystal display device having better display quality can be realized.

  Furthermore, since the dye layer non-formation region 114E exists only in the green layer 114G that contributes to the color development of green, which is the color most effective for visual sensitivity, excellent color development is obtained and the dye layer non-formation region 114E is obtained. The decrease in reflectivity due to the provision of can be reduced.

  Furthermore, in the liquid crystal display device of this embodiment, since the transparent electrode 8 made of a transparent conductive film is directly provided on the transflective layer 62 made of a metal film, the resistance value of the transparent electrode 8 can be lowered. And display unevenness can be reduced.

<I: Eighth Embodiment: Liquid Crystal Display>
In the eighth embodiment, the overall configuration of the liquid crystal display device is the same as that of the fourth embodiment shown in FIG.
In addition, the liquid crystal display device of the eighth embodiment differs from the first embodiment described above in that the area of the light transmission region in each sub-pixel is different, and in the same manner as in the fourth embodiment described above, The areas of the dye layer non-formation regions in the layers are different. Therefore, a detailed description of the same configuration as the liquid crystal display device of the first embodiment or the liquid crystal display device of the fourth embodiment described above is omitted, and semi-transmission that is a characteristic part of the liquid crystal display device of the eighth embodiment. The shapes of the reflective layer and the color filter will be described in detail with reference to the drawings.

  In the eighth embodiment, as illumination light, illumination light whose wavelength corresponding to green is stronger than the brightness of other wavelengths and whose brightness corresponding to blue is weaker than the brightness of other wavelengths is used. An example of the case will be described.

FIG. 32 is a diagram showing a transflective layer and a color filter in the liquid crystal display device of the eighth embodiment, and is a diagram corresponding to FIG. 16A described in the fourth embodiment.
In FIG. 32, reference numeral 703 denotes a transflective layer. Similar to the fourth embodiment, the semi-transmissive reflective layer 703 is formed by opening a metal film in a window shape, and transmits light that is emitted from the backlight 5 or light that is incident from the upper substrate 3 side. Each pixel has a region 701 and a light reflecting region 702 that reflects light incident from the upper substrate 3 side (indicated by a diagonal line rising to the right in FIG. 32).

  However, in the present embodiment, unlike the fourth embodiment, the transflective layer 703 has openings corresponding to the sub-pixels 751R, 751G, and 751B constituting one pixel 751, as shown in FIG. Area, that is, the areas of the light transmission regions 701R, 701G, and 701B constituting the transflective layers 703R, 703G, and 703B and the areas of the light reflection regions 702R, 702G, and 702B are emitted from the illumination device 5 The ratio of the area according to the spectral characteristics.

  On the other hand, as in the fourth embodiment, the color filter is provided corresponding to each pixel constituting the display region, and the red layer 711R and the green layer are orthogonal to the transparent electrode 7 provided on the upper substrate 3. 711G and a blue layer 711B extend, and have a dye layer 711 repeatedly arranged in the order of a red layer 711R, a green layer 711G, and a blue layer 711B.

  As shown in FIG. 32, each of the dye layers 711R, 711G, and 711B includes the entire region that overlaps the light transmission regions 701R, 701G, and 701B of the semi-transmissive reflective layers 703R, 703G, and 703B, and the dye layers 711R, By opening the windows 711G and 711B in a window shape, the light reflection areas 702R, 702G, and 702B are provided in areas excluding a part of the area that overlaps with the plane. As a result, the color filter is a part of the dye layer forming region in which the respective dye layers 711R, 711G, and 711B are provided and a region overlapping the light reflecting regions 702R, 702G, and 702B in a plan view. There are dye layer non-formation regions 711D, 711E, and 711F, which are regions where the layers 711R, 711G, and 711B are not provided.

In the present embodiment, the sub-pixel 751G in which the green layer (green color filter) 711G is formed has an area of the light transmission region 701G corresponding to the sub-pixel 751G compared to the sub-pixels 751R and 751B corresponding to other colors. It is getting smaller. On the other hand, in the sub pixel 751B in which the blue layer (blue color filter) 711B is formed, the area of the light transmission region 701B corresponding to the sub pixel 751B is larger than that of the sub pixels 751R and 751G of other colors. Yes.
In this liquid crystal display device, the area of the dye forming region, that is, the area of each of the dye layers 711R, 711G, and 711B is provided so as to decrease in the order of the blue layer 711B, the red layer 711R, and the green layer 711G. .

  In such a liquid crystal display device, the display color and brightness are adjusted by performing both the first adjustment and the second adjustment described below.

"First adjustment"
By changing the ratio between the light transmission regions 701R, 701G, and 701B and the light reflection regions 702R, 702G, and 702B, the brightness is adjusted so that a transmittance sufficient to obtain bright light is obtained in the transmission mode. .
Further, the sub pixel 751G in which the green layer 711G is formed is made smaller than the other sub pixels 751R and 751B, and the sub pixel 751B in which the blue layer 711B is formed is compared with the other sub pixels 751R and 751G. The ratio between the light transmission regions 701R, 701G, and 701B and the light reflection regions 702R, 702G, and 702B is changed. Accordingly, light having a wavelength corresponding to red and blue having a relatively low luminance among the illumination light is sufficiently transmitted through the transflective layer 703, while light having a wavelength corresponding to green having a relatively high luminance is transmitted. The transmission of the transflective layer 703 is limited, and the display color is adjusted.

"Second adjustment"
By changing the ratio of the area of the dye layer forming region that is the area of each of the dye layers 711R, 711G, and 711B and the area of the dye layer non-forming regions 711D, 711E, and 711F, only bright light can be obtained in the reflection mode. The brightness is adjusted so as to obtain the reflectance.
Also, the dye layers 711R, 711G, and 711B are provided so that the areas of the blue layers 711B, red layers 711R, and green layers 711G become smaller in order, and the dye layer forming regions that are areas of the respective dye layers 711R, 711G, and 711B And the ratio of the areas of the dye layer non-forming regions 711D, 711E, and 711F are changed. As a result, the color characteristics of the color filter are adjusted, and the display color is adjusted.

  Note that the display color in the reflection mode is the light reflection areas 702R, 702G, and 702B associated with the ratio of the light transmission areas 701R, 701G, and 701B and the light reflection areas 702R, 702G, and 702B in the first adjustment. However, if the second adjustment is performed in consideration of the change in the display color due to the first adjustment, even if the display color in the reflection mode is changed due to the first adjustment, Correction can be performed in the second adjustment, and a change in display color in the reflection mode associated with the first adjustment can be prevented from affecting the display color in the actual reflection mode.

In the liquid crystal display device of this embodiment, the first adjustment performed by changing the ratio of the light transmission regions 701R, 701G, and 701B and the light reflection regions 702R, 702G, and 702B, and the area of the dye layer formation region Since both of the second adjustment performed by changing the ratio of the area of the non-dye layer regions 711D, 711E, and 711F are performed, the light transmission is performed so that a bright display can be obtained in the transmission mode in the first adjustment. Even if the regions 701R, 701G, and 701B are enlarged to improve the transmittance and the light reflection regions 702R, 702G, and 702B are reduced, the areas of the dye layer non-formation regions 711D, 711E, and 711F are reduced in the second adjustment. By doing so, it is possible to obtain a reflectance sufficient to obtain a bright display in the reflection mode. Therefore, even if the light transmission regions 701R, 701G, and 701B are enlarged so that a bright display can be obtained in the transmission mode, there is no inconvenience that the display in the reflection mode becomes dark.
Therefore, according to the liquid crystal display device described above, the brightness can be adjusted effectively, and a bright display can be performed in both the reflection mode and the transmission mode.

  In the liquid crystal display device of the present embodiment, the first adjustment performed by changing the ratio of the light transmission regions 701R, 701G, and 701B and the light reflection regions 702R, 702G, and 702B, and the dye layer formation region By performing both the second adjustment performed by changing the ratio of the area and the area of the dye layer non-formation regions 711D, 711E, and 711F, the display color can be effectively adjusted, which is very excellent. Color reproducibility is obtained.

  Specifically, in the liquid crystal display device of the present embodiment, it is possible to suppress the influence that variation in spectral characteristics of illumination light may have on the observation light, and the luminance of the wavelength corresponding to green is higher than the luminance of other wavelengths. Even when transmissive display is performed using illumination light that is strong and has a luminance of a wavelength corresponding to blue that is weaker than the luminance of other wavelengths, an image that is visually recognized by an observer is colored. It can be avoided. That is, similar to the first embodiment, it is possible to realize good color reproducibility by compensating for the non-uniformity of the spectral characteristics in the illumination light.

  Further, the first embodiment is only a display color and brightness adjustment corresponding to the first adjustment in the present embodiment, and the fourth embodiment is a display color and brightness corresponding to the second adjustment in the present embodiment. On the other hand, in the liquid crystal display device of this embodiment, since both the first adjustment and the second adjustment are performed, the color reproducibility can be further improved, which is more excellent. A liquid crystal display device having a high display quality can be realized.

  In addition, in this liquid crystal display device, dye layer non-formation regions 711D, 711E, and 711F are formed in a part of the region that overlaps with the light reflection regions 702R, 702G, and 702B of the transflective layers 703R, 703G, and 703B. Therefore, part of the external light incident on the liquid crystal display device in the reflection mode is transmitted through the dye layer non-formation regions 711D, 711E, and 711F, and is transmitted through the color filter twice in the reflection mode. The light obtained by the above is a combination of uncolored light that passes through the dye layer non-formation regions 711D, 711E, and 711F and colored light that passes through the dye layer 711. On the other hand, all light incident from the backlight 5 and transmitted through the light transmission regions 701R, 701G, and 701B in the transmission mode is transmitted through the dye layer 711, and is obtained by transmitting the color filter once in the transmission mode. All the light that is emitted is colored light. Thus, the difference in color density between the light obtained by passing through the color filter twice in the reflection mode and the light obtained by passing through the color filter once in the transmission mode can be reduced.

  As a result, similarly to the fourth embodiment, similarly to the reflection mode and the transmission mode, it is possible to realize a color transflective liquid crystal display device that has good color development and can display with high visibility. .

<J: Ninth Embodiment: Liquid Crystal Display>
In the ninth embodiment, the overall configuration of the liquid crystal display device is the same as that of the fifth embodiment shown in FIG.
Further, in the liquid crystal display device of the ninth embodiment, the area of the light transmission region in each sub-pixel is different and the area of the dye layer non-formation region in each dye layer is the same as in the above-described eighth embodiment. The liquid crystal display device according to the ninth embodiment differs from the liquid crystal display device according to the eighth embodiment only in the shapes of the transflective layer and the color filter. For this reason, the transflective layer and the color filter will be described in detail with reference to the drawings.

FIG. 33 is a diagram illustrating a transflective layer and a color filter in the liquid crystal display device of the ninth embodiment, and corresponds to FIG. 17A described in the fifth embodiment.
In FIG. 33, reference numeral 803 denotes a transflective layer. Similar to the fifth embodiment, the semi-transmissive reflective layer 803 is provided to extend in a stripe shape in the direction perpendicular to the paper surface so as to be orthogonal to the transparent electrode 7 provided on the upper substrate 3, and is provided on the lower substrate 2. It is formed at the same pitch as the transparent electrode 8 formed. Then, as shown in FIG. 33, the width of the pattern of the transparent electrode 8 provided on the lower substrate 2 is formed larger than the width of the pattern of the metal film constituting the transflective layer 803. A band-like region where the metal film constituting the transflective layer 803 and the transparent electrode 8 do not overlap in plane is a light transmission region 801, and the entire region where the metal film is provided is a light reflection region 802 (FIG. No. 33 is indicated by a diagonal line rising to the right).

  However, in the present embodiment, unlike the fifth embodiment, the transflective layer 803 includes regions along the edges of the sub-pixels 851R, 851G, and 851B that constitute one pixel 851, as shown in FIG. That is, the area of the light transmission regions 801R, 801G, and 801B constituting the transflective layers 803R, 803G, and 803B and the area of the light reflection regions 802R, 802G, and 802B are spectral characteristics of the illumination light emitted from the illumination device 5. It becomes the ratio of the area according to.

  On the other hand, as in the fifth embodiment, the color filter is provided corresponding to each pixel constituting the display region, and the red layer 811R and the green layer are orthogonal to the transparent electrode 7 provided on the upper substrate 3. 811G and a blue layer 811B extend, and have a dye layer 811 repeatedly arranged in the order of a red layer 811R, a green layer 811G, and a blue layer 811B.

As shown in FIG. 33, each of the dye layers 811R, 811G, and 811B includes an entire region that overlaps the light transmission regions 801R, 801G, and 801B of the transflective layers 803R, 803G, and 803B and the dye layers 111R, 111G and 111B are provided in stripes so that they are provided in a region excluding a part of the region that overlaps with the light reflection regions 802R, 802G, and 802B of the transflective layers 803R, 803G, and 803B.
As a result, the color filter is part of the dye layer forming region where the respective dye layers 811R, 811G, and 811B are provided and the region that overlaps the light reflecting regions 802R, 802G, and 802B in a plan view. Dye layer non-formation regions 811D, 811E, and 811F, which are regions where the layers 811R, 811G, and 811B are not provided, are present.

Also in this embodiment, as in the eighth embodiment, for the sub-pixel 851G in which the green layer (green color filter) 811G is formed, the area of the light transmission region 801G corresponding to this corresponds to other colors. This is smaller than the sub-pixels 851R and 851B. On the other hand, in the sub pixel 851B in which the blue layer (blue color filter) 811B is formed, the area of the light transmission region 801B corresponding to the sub pixel 851B is larger than that of the sub pixels 851R and 851G of other colors. Yes.
Also in this liquid crystal display device, as in the eighth embodiment, the area of the dye forming region, that is, the area of each of the dye layers 811R, 811G, and 811B is the order of the blue layer 811B, the red layer 811R, and the green layer 811G. It is provided to be smaller.

Also in such a liquid crystal display device, the ratio of the light transmission regions 801R, 801G, 801B and the light reflection regions 802R, 802G, 802B is changed to adjust the display color and brightness, and the area of the dye layer formation region The display color and brightness can be adjusted by changing the ratio between the area of the pigment layer non-formation regions 811D, 811E, and 811F. Therefore, the display color and brightness can be adjusted effectively.
Therefore, according to the above-described liquid crystal display device, as in the eighth embodiment, bright display can be performed both in the reflection mode and in the transmission mode, and very excellent color reproducibility can be obtained.

  Further, in this liquid crystal display device, since the dye layer non-formation regions 811D, 811E, and 811F are formed, the light obtained by passing through the color filter twice in the reflection mode and the color filter in the transmission mode are 1 Color transflective liquid crystal with a color that can reduce the difference in color shade from the light obtained by the two-time transmission and has good color development and high visibility in both the reflection mode and the transmission mode. A display device can be realized.

The liquid crystal display device of the present invention is not limited to the example shown in the above-described embodiment. For example, the transflective layer is made of aluminum, and the dye layer includes a blue layer and a red layer. The area of the dye layer forming region may be provided so that the blue layer is smaller than the red dye layer.
In such a liquid crystal display device, since the area of the dye layer forming region is provided so that the blue layer is smaller than the red dye layer, the transflective layer is made of aluminum, Even if the light reflected by the transflective layer is colored blue, it can be corrected by passing through the color filter twice.
Therefore, a liquid crystal display device having excellent color reproducibility and high display quality can be realized.

The transflective layer is made of silver, the dye layer includes a red layer and a blue layer, and the area of the dye layer forming region is smaller than that of the blue dye layer. It may be provided.
In such a liquid crystal display device, since the area of the dye layer forming region is provided so that the red layer is smaller than the blue dye layer, the transflective layer is made of silver, Even if the light reflected by the transflective layer is colored yellow, it can be corrected by passing through the color filter twice. Therefore, a liquid crystal display device having excellent color reproducibility and high display quality can be realized.

  In the liquid crystal display device of the present invention, the planarization film may be formed so as to cover the color filter as in the example described in the above embodiment, but the unevenness formed by the color filter is flattened. For example, it may be formed only in the dye layer non-formation region of the color filter. In the case where the flattening film is formed only in the non-dye layer region of the color filter, when the overcoat layer is provided on the flattening film, the overcoat layer is provided without forming the flattening film. Thus, the thickness of the overcoat layer can be reduced. Further, for example, an overcoat layer may be formed without forming a flattening film, and unevenness formed by the color filter may be flattened by the overcoat layer, and the overcoat layer may also serve as the flattening film. .

Further, as in the example shown in the above-described embodiment, the planarization film may be formed by embedding the planarization film in the dye layer non-formation region, but the transparent layer may be separately provided from the planarization film. And filling the non-dye layer forming region, a flattening film may be formed on the transparent layer and the dye layer forming region for flattening.
Further, the semi-transmissive reflective layer refers to a layer having a reflective function provided with a transmissive portion, and may not be a mere reflective layer. That is, a reflective polarizer having a polarization function may be used. Examples of the reflective polarizer include a circularly polarizing plate made of cholesteric liquid crystal, a beam splitter linearly polarizing plate using a Brewster angle, and a wire grid linear polarizer in which a plurality of slits of about 60 nm are formed in the reflective layer.

  In addition, as an example of a liquid crystal display device to which the present invention can be applied, a passive matrix type liquid crystal display device can be cited as in the example shown in the above-described embodiment. The present invention can also be applied to an active matrix liquid crystal display device using a switching element such as a diode (TFD) or a thin film transistor (TFT).

(Electronics)
Next, an example of an electronic device including the liquid crystal display device of the above embodiment will be described.
First, an example in which the above-described liquid crystal display device is applied to a display unit of a mobile phone will be described. FIG. 22 is a perspective view showing the configuration of this mobile phone. As shown in the figure, a mobile phone 1032 includes a plurality of operation buttons 1321, a mouthpiece 1322, a mouthpiece 1323, and a liquid crystal display device according to the present invention (in FIG. 22, only the first substrate 3 is shown). The display unit 1324 is used.

FIG. 23 is a perspective view showing an example of a wristwatch type electronic apparatus.
In FIG. 23, reference numeral 1100 indicates a watch body, and reference numeral 1101 indicates a liquid crystal display unit using the liquid crystal display device.

FIG. 24 is a perspective view showing an example of a portable information processing apparatus such as a word processor or a mobile personal computer (personal computer).
In FIG. 24, reference numeral 1200 denotes an information processing apparatus, reference numeral 1202 denotes an input unit such as a keyboard, reference numeral 1204 denotes an information processing apparatus body, and reference numeral 1206 denotes a liquid crystal display unit using the liquid crystal display device.

In addition to the mobile phone shown in FIG. 22, the wristwatch type electronic equipment shown in FIG. 23, and the personal computer shown in FIG. 24, the electronic equipment includes a liquid crystal television, a viewfinder type and a monitor direct view type. Examples include a video tape recorder, a car navigation device, a pager, an electronic notebook, a calculator, a word processor, a workstation, a videophone, a POS terminal, and a device equipped with a touch panel.
As described above, according to the liquid crystal display device of the present invention, high color reproducibility can be realized by compensating for the non-uniformity of the spectral characteristics in the illumination light from the illumination device, and the transmission mode can be achieved even in the reflection mode. At the same time, it is possible to provide an electronic device having a liquid crystal display device with good color development and excellent visibility, which is particularly suitable for an electronic device that requires high-quality display.

〔Example〕
Hereinafter, although an example is shown and the effect of the present invention is clarified, the present invention is not limited to the following examples. Moreover, the reflective films of Test Examples 1 to 4 are silver alloys, and are colored yellow.

“Test Example 1”
The liquid crystal display device of the fifth embodiment shown in FIG. 17 is manufactured, and the area ratio of the light transmission region to the light reflection region is 17:19, and each of the dye layers 111R, 111G, and 111B is not provided. The ratio of the areas of the dye layer non-forming regions 111D, 111E, and 111F was red layer 111D: green layer 111E: blue layer 111F = 4: 14: 6.

"Test Example 2"
As shown in FIG. 25, the area ratio of the light transmission region and the light reflection region is set to 17:19, and further, the dye layer non-formation region 112D which is a region where the dye layers 112R, 112G, and 112B are not provided in the color filter 102. , 112E and 112F, except that the ratio of the areas of red layer 112D: green layer 112E: blue layer 112F = 1: 1: 1 is the same as that of the liquid crystal display device of the fifth embodiment shown in FIG. A liquid crystal display device was produced.

“Test Example 3”
As shown in FIG. 26, the area ratio of the light transmission region and the light reflection region is 11:25, and the pigment layer 113R, 113G, 113B of the color filter 103 is not provided with a pigment layer non-formation region, The liquid crystal display device is the same as the liquid crystal display device of the fifth embodiment shown in FIG. 17 except that the color characteristics of the color filter are optimized (color purity is lowered) with emphasis on display in the reflection mode. Was made.

  In Test Example 1 to Test Example 3, Test Example 1 is an example of the present invention, and Test Example 2 and Test Example 3 are comparative examples.

With respect to the liquid crystal display devices of Test Example 1 to Test Example 3 thus manufactured, the light obtained in the reflection mode and the light obtained in the transmission mode were measured.
The results are shown in Table 1 and FIGS.
FIG. 27 is a diagram showing a result of measuring light emitted from the liquid crystal display device of Test Example 1. FIG. 27A is a chromaticity diagram of light obtained in the reflection mode, and FIG. B) is a chromaticity diagram of light obtained in the transmission mode. FIG. 28 is a diagram showing a result of measuring light emitted from the liquid crystal display device of Test Example 2, and FIG. 28A is a chromaticity diagram of light obtained in the reflection mode. 28B is a chromaticity diagram of light obtained in the transmission mode. FIG. 29 is a diagram showing the results of measuring the light emitted from the liquid crystal display device of Test Example 3, and FIG. 29A is a chromaticity diagram of the light obtained in the reflection mode. FIG. 29B is a chromaticity diagram of light obtained in the transmission mode.

ここで、「色域面積」とは、ＣＩＥ色度図上において、赤、緑、青の各表示色のｘ，ｙ座標の３点を結んで出来る三角形の面積のことを言う。

Here, “color gamut area” refers to the area of a triangle formed by connecting three points of x, y coordinates of each display color of red, green, and blue on the CIE chromaticity diagram.

As shown in Table 1, FIG. 29, and FIG. 30, the liquid crystal display device of Test Example 3, which is a comparative example, has a narrow color gamut area for both the light obtained in the reflection mode and the light obtained in the transmission mode.
In addition, as shown in Table 1, FIG. 28, and FIG. 29, the liquid crystal display device of Test Example 2, which is a comparative example, is more light in the reflection mode than in the liquid crystal display device of Test Example 3. The resulting light also has a wide color gamut area. In addition, it has a sufficient white display reflectance. However, the red display of the light obtained in the reflection mode is purple.

On the other hand, the liquid crystal display device of Test Example 1, which is an embodiment of the present invention, is obtained in the reflection mode as compared with the liquid crystal display device of Test Example 3 as shown in Table 1, FIG. 27 and FIG. Both the light and the light obtained in the transmission mode have a wide color gamut area and have a sufficient white display reflectance.
Further, even when compared with the liquid crystal display device of Test Example 2, the color gamut area of the light obtained in the reflection mode is wide. Moreover, as in the liquid crystal display device of Test Example 2, the color purity of red display and blue display is increased in the light obtained in the reflection mode.
Therefore, in the liquid crystal display device of Test Example 1, which is an embodiment of the present invention, there is little difference in color between the light obtained in the reflection mode and the light obtained in the transmission mode, excellent color reproducibility, and sufficient whiteness. It was confirmed to have display reflectance.
As a result, the liquid crystal display device of Test Example 1, which is an embodiment of the present invention, develops color both in the reflection mode and in the transmission mode, as compared with the liquid crystal display devices of Test Example 2 and Test Example 3, which are comparative examples. It was clear that it was possible to display with high visibility.

“Test Example 4”
The liquid crystal display device of the seventh embodiment shown in FIGS. 20 and 21 is manufactured, the area ratio of the light transmission region to the light reflection region is 17:19, and the green layer 114G and the green layer 114G are provided. The area ratio of the dye layer non-formation region 111E, which is a region in which no is provided, is 7: 1, and a color filter having spectral characteristics shown in FIG. 31 is used as the color filter. That is, for the liquid crystal display device of Test Example 1, the color purity of the green and red color filters was increased, and instead the color purity of the blue color filter was lowered to increase the transmittance.
Note that Test Example 4 above is an example of the present invention.

With respect to the liquid crystal display device of Test Example 4 produced as described above, the light obtained in the reflection mode and the light obtained in the transmission mode were measured in the same manner as the liquid crystal display device of Test Example 1 described above.
The results are shown in Table 2 and FIG.
FIG. 30 is a diagram showing a result of measuring light emitted from the liquid crystal display device of Test Example 4, and FIG. 30A is a chromaticity diagram of light obtained in the reflection mode, and FIG. B) is a chromaticity diagram of light obtained in the transmission mode.

As shown in Table 2 and FIG. 30, in the liquid crystal display device of Test Example 4, although the white display reflectance and transmittance were not much changed as compared with the liquid crystal display device of Test Example 1, the green color purity was low. In addition, the color gamut area of the light obtained in the reflection mode and the light obtained in the transmission mode was considerably improved.
Thus, by providing the dye layer non-formation region 114E only on the green layer 114G that contributes to the color development of green, which is the color most effective for visibility, excellent color development can be obtained, and the dye layer non-formation region 114E can be obtained. The decrease in white display reflectance due to the provision can be reduced.
In addition, the transmittance is increased by reducing the color purity of the blue color filter, and by providing the pigment layer non-formation region 114E only in the green layer 14G, the reflection layer in the reflection mode is colored yellow. Was also improved.

“Test Example 5 to Test Example 8”
A light transmission region, a dye layer forming region that is the area of each dye layer, and a dye layer non-forming region were set to the areas shown in Table 3 to produce a liquid crystal display device.
Of Test Examples 5 to 8, Test Examples 5 to 7 are examples of the present invention, and Test Example 8 is a conventional example.
FIG. 33 shows an example of the dimensions of each part when the liquid crystal display device of Test Example 7 is manufactured. The unit of the size of each part described in FIG. 33 is a [mu] m, the sub-pixel pitch, 237 × 79 (μm), the sub-pixel area, was 14784μm ^2.

For the liquid crystal display devices of Test Example 5 to Test Example 8 produced in this way, the x, y coordinates, reflectance, and transmittance of white display on the CIE chromaticity diagram in the reflection mode and the transmission mode were measured, respectively. .
The results are shown in Table 3.

  In the liquid crystal display device of Test Example 8, as shown in the white display in the reflection mode and the white display in the transmission mode, the liquid crystal display device is green. It can also be seen that the reflectance is low and the display in the reflection mode is dark.

On the other hand, in Test Example 5, while maintaining the transmittance in Test Example 8, the width of the pattern of the metal film constituting the transflective layer is adjusted so that the area of the green light transmission region is reduced, and red The areas of the light transmission region and the blue light transmission region were increased, and a green dye layer non-formation region was provided.
As a result, as shown in Table 3, in Test Example 5, the reflectance is improved compared to Test Example 8, and the green display of white display in the reflection mode and the transmission mode is improved, and on the CIE chromaticity diagram. Near the ideal white display color coordinates (x = 0.310, y = 0.316).

In Test Example 6, while maintaining the transmittance in Test Example 8 and the area of the light transmission region in Test Example 5, the green dye layer non-formation area is enlarged and the red dye layer non-formation area Was provided.
As a result, as shown in Table 3, in Test Example 6, as compared with Test Example 5, the reflectance is further improved, the white display in green in the reflection mode is further improved, and is more ideal. The color coordinates of the white display are approached.

In Test Example 7, while maintaining the transmittance in Test Example 8 and the area of the green light transmissive region in Test Example 5 and Test Example 6, the area of the red light transmissive region is reduced to reduce the blue light. The area of the transmission region was increased, the green pigment layer non-formation region was larger, the red pigment layer non-formation region was enlarged, and the blue pigment layer non-formation region was also provided.
As a result, as shown in Table 3, in Test Example 7, the white display in the transmissive mode did not change much compared to Test Example 6, but the reflectance was further improved, and the white in the transmissive mode was further improved. The display approaches the ideal white display color coordinates.

From Test Example 5 to Test Example 8, sufficient reflection to obtain a bright display in the reflection mode is achieved by increasing the area of the dye layer non-formation region while ensuring a transmittance capable of obtaining a bright display in the transmission mode. It was confirmed that a liquid crystal display device capable of obtaining a high rate and capable of displaying brightly in both the reflection mode and the transmission mode was obtained.
In addition, by adjusting the area of the light transmission region and the area of the dye layer non-formation region (dye layer formation region), a liquid crystal display device capable of displaying with excellent color reproducibility in both the reflection mode and the transmission mode Was confirmed to be obtained.

"Test Example 9"
The light transmission regions 701R, 701G, and 701B, the dye layer forming regions that are the areas of the respective dye layers 711R, 711G, and 711B, and the dye layer non-forming regions 711D, 711E, and 711F are shown in Table 7 The liquid crystal display device of the eighth embodiment shown in FIG. 32 having the same area was produced.
Test Example 9 is an example of the present invention.
FIG. 32 shows an example of the dimensions of each part when the liquid crystal display device of the eighth embodiment has the same area as each part of the liquid crystal display device of Test Example 7. The unit of the size of each part described in FIG. 32 is a [mu] m, the sub-pixel pitch, 237 × 79 (μm), the sub-pixel area, was 14784μm ^2.

With respect to the liquid crystal display device of Test Example 9 thus manufactured, the reflectance, white display in the reflection mode, transmittance, and white display in the transmission mode were measured.
As a result, a result equivalent to that of Example 7 shown in Table 3 was obtained.

As shown in Table 3, in the liquid crystal display device of Test Example 9, compared with Test Example 8, the reflectance is improved, the green display of white display in the reflection mode and the transmission mode is improved, and it approaches white. It was.
Therefore, in the liquid crystal display device according to the eighth embodiment, as in the liquid crystal display device according to the ninth embodiment, a liquid crystal display device capable of displaying with excellent color reproducibility in both the reflection mode and the transmission mode can be obtained. Regardless of the shape of the light transmission region and the dye layer non-formation region (dye layer formation region), the area of the light transmission region and the area of the dye layer non-formation region (dye layer formation region) are adjusted for each color. By doing so, it became clear that a liquid crystal display device capable of displaying with excellent color reproducibility in both the reflection mode and the transmission mode can be obtained.

  As described above, according to the present invention, the proportion of the light-transmitting region in each sub-pixel is a proportion corresponding to the spectral characteristics of the illumination light, so that the illumination light spectrum used for the transmissive display is divided. Even when the characteristics are non-uniform, it is possible to suppress a decrease in color reproducibility due to this.

In the liquid crystal display device of the present invention, each dye layer is formed in the entire region that overlaps the light transmission region in a plane and the region excluding a part of the region that overlaps the light reflection region in a plane. Since there is a dye layer forming area in which each dye layer is formed and a dye layer non-forming area in a part of the area overlapping the light reflecting area in plan view, it passes through the color filter twice in the reflection mode. The resulting light is a combination of uncolored light that passes through the dye layer non-forming region and colored light that passes through the dye layer forming region. On the other hand, the light obtained by passing through the color filter once in the transmission mode is all colored light. Thus, the difference in color density between the light obtained by passing through the color filter twice in the reflection mode and the light obtained by passing through the color filter once in the transmission mode can be reduced.
As a result, it is possible to realize a color transflective liquid crystal display device that has a good color and can display with high visibility in the reflection mode and the transmission mode.

  Moreover, in the liquid crystal display device of the present invention, the area of the dye layer forming region is formed so that the dye layer of at least one color and the dye layer of the other color are different among the dye layers. The color characteristics of the color filter can be adjusted by changing the area of the dye layer forming region, color reproducibility can be improved, and a liquid crystal display device having excellent display quality can be realized.

  Further, in the liquid crystal display device of the present invention, the transparent layer for flattening the step between the dye layer forming region and the region where the dye layer is not provided is provided, so that the dye layer forming region and the dye are provided. An adverse effect due to a step difference from a region where no layer is provided can be prevented, and the reliability of the liquid crystal display device can be improved.

It is sectional drawing which shows the structure of the liquid crystal display device which concerns on 1st Embodiment of this invention. In the same liquid crystal display device, it is a graph showing the spectral characteristics of the illumination light irradiated from the illumination device to the liquid crystal display panel. FIG. 4 is a plan view showing a positional relationship between a transparent electrode on a first substrate and elements formed on a second substrate in the liquid crystal display device. 4 is a graph showing transmittance characteristics of color filters corresponding to respective colors in the liquid crystal display device. 4 is a graph showing spectral characteristics of light transmitted through a liquid crystal display panel and emitted to the observation side in the liquid crystal display device. It is a graph which shows the spectral characteristic of the light which permeate | transmits a liquid crystal display panel and radiate | emits to an observation side, when all the opening parts in a reflection layer are made into the same area. It is sectional drawing which illustrates the structure of the liquid crystal display device which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the principal part of the liquid crystal display panel in the liquid crystal display device. FIG. 4 is a plan view showing a positional relationship between a pixel electrode on a first substrate and elements formed on a second substrate in the liquid crystal display device. It is sectional drawing which illustrates the structure of the liquid crystal display device which concerns on 3rd Embodiment of this invention. 4 is a graph showing transmittance characteristics of color filters corresponding to respective colors in the liquid crystal display device. 4 is a plan view showing a positional relationship between sub-pixels and a reflective layer in the liquid crystal display device. FIG. It is a CIE chromaticity diagram which shows the color coordinate of the display color by the liquid crystal display device. In the liquid crystal display device which concerns on the modification of this invention, it is a top view which shows the positional relationship of the transparent electrode on a 1st board | substrate, and each element formed on the 2nd board | substrate. FIG. 2 is a diagram illustrating an example of a liquid crystal display device of the present invention, and is a partial cross-sectional view illustrating an example of a passive matrix transflective color liquid crystal display device in which a color filter is provided on an inner surface side of a lower substrate. . FIG. 16 is a diagram illustrating only a semi-transmissive reflective layer, a color filter, and a light-shielding film in the liquid crystal display device illustrated in FIG. 15, and FIG. 16A is a plane for explaining the overlap between the semi-transmissive reflective layer and the color filter. FIG. 16B is a cross-sectional view taken along line AA ′ shown in FIG. FIG. 17A is a diagram illustrating only a transflective layer, a color filter, and a transparent electrode of a lower substrate in a liquid crystal display device of a fifth embodiment, and FIG. 17A illustrates the overlap between the transflective layer and the color filter. FIG. 17B is a cross-sectional view taken along the line CC ′ shown in FIG. FIG. 6 is a diagram showing another example of the liquid crystal display device of the present invention, and is a partial cross-sectional view showing an example of a passive matrix transflective color liquid crystal display device in which a color filter is provided on the inner surface side of the upper substrate. It is. FIG. 19 is a diagram showing only the semi-transmissive reflective layer and the color filter in the liquid crystal display device shown in FIG. 18, and FIG. 19A is a plan view for explaining the overlap between the semi-transmissive reflective layer and the color filter. FIG. 19B is a cross-sectional view taken along the line BB ′ shown in FIG. It is the figure which showed the other example of the liquid crystal display device of this invention, and the partial cross section which showed an example of the transflective color liquid crystal display device of the passive matrix system by which the transparent electrode is directly provided on the transflective layer FIG. FIG. 21A is a diagram showing only the transflective layer, the color filter, and the transparent electrode of the lower substrate in the liquid crystal display device shown in FIG. 20, and FIG. 21A illustrates the overlap between the transflective layer and the color filter. FIG. 21B is a cross-sectional view taken along the line DD ′ shown in FIG. It is the perspective view which showed an example of the mobile telephone. It is the perspective view which showed an example of the wristwatch type electronic device. It is the perspective view which showed an example of portable information processing apparatuses, such as a word processor and a personal computer. FIG. 25A is a diagram showing only a transflective layer, a color filter, and a transparent electrode of a lower substrate in the liquid crystal display device of Test Example 2, and FIG. 25A illustrates the overlap between the transflective layer and the color filter. FIG. 25B is a cross-sectional view of FIG. FIG. 26A is a diagram illustrating only a transflective layer, a color filter, and a transparent electrode on a lower substrate in the liquid crystal display device of Test Example 3, and FIG. 26A illustrates the overlap between the transflective layer and the color filter. FIG. 26B is a cross-sectional view of FIG. It is the figure which showed the result which measured the light radiate | emitted from the liquid crystal display device of Test Example 1, FIG.27 (A) is a chromaticity diagram of the light obtained at the time of reflection mode, FIG.27 (B) It is a chromaticity diagram of light obtained in the transmission mode. It is the figure which showed the result which measured the light radiate | emitted from the liquid crystal display device of the test example 2, FIG.28 (A) is a chromaticity diagram of the light obtained at the time of reflection mode, FIG.28 (B) It is a chromaticity diagram of light obtained in the transmission mode. It is the figure which showed the result which measured the light radiate | emitted from the liquid crystal display device of Test Example 3, FIG.29 (A) is a chromaticity diagram of the light obtained at the time of reflection mode, FIG.29 (B) It is a chromaticity diagram of light obtained in the transmission mode. It is the figure which showed the result which measured the light radiate | emitted from the liquid crystal display device of Test Example 4, FIG.30 (A) is a chromaticity diagram of the light obtained at the time of reflection mode, FIG.30 (B) It is a chromaticity diagram of light obtained in the transmission mode. It is the figure which showed the spectral characteristic of the color filter used for the liquid crystal display device of the test example 4, and is the graph which showed the relationship between the transmittance | permeability of a color filter, and a wavelength. It is the figure which showed the transflective layer and color filter in the liquid crystal display device of 8th Embodiment. It is the figure which showed the transflective layer and color filter in the liquid crystal display device of 9th Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,100,200,500 ... Liquid crystal panel (liquid crystal display panel), 2 ... Lower substrate, 3 ... Upper substrate, 4 ... Liquid crystal layer, 5 ... Back light (illuminating device), 6, 61, 62, 521, 703 803... Semi-transmissive reflective layer (reflective layer), 6a, 61a, 62a, 701, 801 ... Light transmissive region, 6b, 61b, 62b, 702, 802 ... Light reflective region, 7, 8, 511, 525 ... Transparent electrode, 9, 15 ... Alignment film 10, 20, 101, 104, 522 ... Color filter, 11, 21, 114, 711, 811 ... Dye layer, 11B, 21B, 111B, 114B, 711B, 811B Blue layer, 11D, 11E , 11F, 21D, 21E, 21F, 111D, 111E, 111F, 114E, 711D, 711E, 711F, 811D, 811E, 811F... G, 21G, 111G, 114G, 711G, 811G ... green layer, 11R, 21R, 111R, 114R, 711R, 811R ... red layer, 12, 22, 32 ... flattened film, 13 ... upper polarizer, 14 ... lower polarization Reference numeral 16: Forward scattering plate, 17: Phase difference plate, 18: Quarter wavelength plate, 19: Reflecting polarizer, 23: Insulating film, 41, 42, 43 ... Light shielding film, 51: Reflecting plate, 503 ... Seal Material, 521a ... opening, 551, 751R, 751G, 751B, 851R, 851G, 851B ... sub-pixel, 615 ... pixel (dot), 621 ... LED, 622 ... light guide plate.

Claims (5)

A liquid crystal sandwiched between a pair of opposing substrates;
A plurality of sub-pixels corresponding to different colors;
A light transmission region and a light reflection region provided in the sub-pixel;
A reflective layer provided in the light reflection region;
A color filter provided corresponding to the sub-pixel,
A liquid crystal display device, wherein a width of the light transmission region in one subpixel of the plurality of subpixels is different from a width of the light transmission region in another subpixel in the longitudinal direction of the subpixel. A liquid crystal sandwiched between a pair of opposing substrates;
A plurality of sub-pixels corresponding to different colors;
A light transmission region and a light reflection region provided in the sub-pixel;
A reflective layer provided in the light reflection region;
A color filter provided corresponding to the sub-pixel,
In the short direction of the sub-pixel, a width of the light transmission region in one sub-pixel of the plurality of sub-pixels is different from a width of the light transmission region in another sub-pixel. .   The liquid crystal display device according to claim 1, wherein the reflective layer includes a portion that overlaps a side of the sub-pixel.   The liquid crystal display device according to claim 1, wherein the reflective layer is an electrode for applying a voltage to the liquid crystal.   An electronic apparatus comprising the liquid crystal display device according to any one of claims 1 to 4.

Images