JP2000267097A - Liquid crystal device and electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal device which can secure the visibility of a display object at a dark place by installing a liquid crystal panel where liquid crystal is sandwiched by a pair of substrates and an illumination means where a light emitting layer has a light emitting part formed by sandwiching it by a pair of electrodes. SOLUTION: A glass-made supporting board 120 is arranged at the upper part of a liquid crystal panel and a light emitting part 100 formed of organic EL is formed at the inner face (lower face) of the supporting board 120. The light emitting part 100 is formed in a part between the respective pixels of a liquid crystal panel, namely, a part overlapped with a data line and a scanning line, when the liquid crystal panel is viewed from above, in a grid form in the case of an active matrix type, and an illumination means 310 is constituted. When the liquid crystal panel is viewed, the light emitting part 100 is formed so that it does not overlap a pixel electrode in terms of a plane. Thus, a reflection area can be secured without narrowing a display area with such constitution. Thus, a bright reflection-type liquid crystal device can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid crystal device and an electronic device.

[0002]

2. Description of the Related Art Heretofore, as a display using a liquid crystal device, a transmission type liquid crystal device having a backlight as a light source has been mainly used. However, it is necessary to reduce the power consumption of liquid crystal devices mainly used in portable electronic devices, and there is a limit to transmission type liquid crystal devices that require a backlight. Is being done.

The reflection type liquid crystal device uses natural light from the outside as a light source, so that it is possible to significantly reduce power consumption. However, since a clear display cannot be obtained in a dark place, recently, the reflection type liquid crystal device has recently been developed. A reflective liquid crystal device with a front light has been announced.

In a reflection type liquid crystal device equipped with this front light, the front light only needs to be turned on / off according to the brightness of the place of use, and the power consumption of a portable electronic device equipped with such a reflection type liquid crystal device can be reduced. The battery can be driven for a long time because the battery is not wasted.

Here, an example of a conventional front light will be described with reference to FIG. Light guide plate 6 on the front of liquid crystal panel P
20 and a cold cathode tube 640 attached to the side thereof
Is guided by the light guide plate 620, and the light is emitted in the direction of the liquid crystal panel P by the uneven pattern 600 provided on the liquid crystal panel P side of the light guide plate 620. The liquid crystal panel P is configured as a reflective display having a reflector, and can be visually recognized even in a dark place by being illuminated by the emitted light L.

[0006]

However, the above-described front light has various problems as described below. First, since the light guide plate is thick, the light reflected from the liquid crystal panel is absorbed by the light guide plate, the light transmittance is reduced, and the display becomes dark. Second, the unevenness pattern of the prism sheet formed for defining the light emission direction is seen from the viewer's side, so that the visibility of the display is reduced. Third, when the front light is turned on, not only the light reflected from the liquid crystal panel does not necessarily reach the observer, but some light (leakage) reaches the observer from the cold cathode tube via the light guide plate. Decrease.

Further, if an illuminating device comprising a cold cathode tube and a light guide plate is used, it is difficult to make the brightness of the display area uniform, and the cold cathode tube is attached to the side of the liquid crystal panel, so that the entire device is used. Becomes large and miniaturization becomes difficult. Further, since the power consumption during lighting is large, there is a limit in reducing power consumption. That is, when mounted on a portable electronic device, it cannot be used continuously for a long time due to the problem of power consumption.

Accordingly, an object of the present invention is to provide a liquid crystal device provided with an illuminating means capable of ensuring the visibility of a display even in a dark place, and an electronic apparatus provided with the liquid crystal device.

[0009]

A liquid crystal device disclosed in the present application has a liquid crystal panel in which liquid crystal is sandwiched between a pair of substrates, and an illuminating means having a light emitting portion in which a light emitting layer is formed between a pair of electrodes. It is provided with.

With such a configuration, the light-emitting portions constituting the illuminating means can be arranged on the surface of the liquid crystal panel in a flat and uniform manner, and the illumination efficiency can be improved.

[0011] Further, the light-emitting portion constituting the illuminating means,
It was arranged and formed in a predetermined pattern on the support plate.

Thus, the lighting means can be constituted independently of the liquid crystal panel, so that the liquid crystal panel to be combined can be one manufactured by the same manufacturing method as before. Also, the arrangement of the light emitting units can be freely set, and the display quality can be improved.

Further, the reflection type liquid crystal panel is provided with a plurality of pixel electrodes arranged in a matrix, and a light emitting portion forming the illuminating means has a light emitting portion between the pixel electrodes and the pixel electrodes when viewed from a display observation surface. It is desirable to arrange them at a site between them.

According to this, since the light emitting layer is provided at a portion which does not originally contribute to the display, a bright display can be obtained without lowering the aperture ratio, and when the illuminating means is provided on the viewing side of the liquid crystal panel. In this case, the light emitting layer can also be used as a black mask.

It is preferable that the illuminating means is provided on a surface of the liquid crystal panel on a display observation side, and a low reflection means is provided on a display viewing side of the illuminating means.

Thus, it is possible to prevent the light incident from the outside from being reflected by the electrodes forming the light emitting portion or the like, thereby lowering the contrast.

[0017] Further, the light-emitting portion constituting the illuminating means may include:
It is possible to divide and form a plurality of regions each having a different emission color.

According to this, for example, when a display is performed by reflection of external light without a color filter, even if it is a reflection type liquid crystal panel which is a monochrome display, the illuminating means uses red, blue, green, etc. for each pixel. By irradiating light of different color tones, color display can be performed during illumination.

In the case where the liquid crystal panel is a reflective type color liquid crystal panel having a color filter, the light emission color of the light emitting section corresponds to the transmission color of the color filter provided in each pixel to be illuminated. , It is also possible to arrange.

Thus, the illumination can be efficiently performed, and at the time of illumination, a clearer color can be displayed than when external light is reflected.

Preferably, a light transmitting member is formed between the support plate on which the illuminating means is formed and a constituent member of the liquid crystal panel facing the support plate.

This protects the light emitting section,
Excessive interface reflection on the liquid crystal panel surface and the support plate constituting the illumination means can be suppressed.

Further, it is possible to provide a touch sensor function on the support plate constituting the illuminating means.

Conventionally, another support substrate provided with electrodes for a touch sensor had to be attached to the surface of the liquid crystal panel. However, a support plate constituting the illuminating means and an electrode constituting a light emitting portion were not provided. It is possible to provide a lighting device with a touch sensor, which can reduce the cost of members because it can be used also as those for a touch sensor.

Further, it is desirable that the light emitting layer constituting the light emitting section is formed by organic electroluminescence (hereinafter referred to as organic EL).

The organic EL is excellent in power consumption because it can emit light at a low DC voltage, and it is also possible to form a fine pattern of a light emitting portion by various methods in patterning. Therefore, the light emitting element is very suitable for the purpose of realizing the lighting means.

In an electronic apparatus having the liquid crystal device of the present invention as a display, by using a reflective type in a bright place, it is possible to perform display with low power consumption and good visibility, while using illumination means. Accordingly, a bright and clear display can be obtained without lowering the visibility even in a dark place.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of the configuration of a liquid crystal device to which the present invention is applied, in which a liquid crystal display system of a single-polarizer type is combined with active matrix driving by TFTs. FIG. 1A is a plan view, and FIG.
It is sectional drawing in H '.

First, the configuration of the reflection type liquid crystal panel 320 will be described.

On the upper surface of the lower substrate 210A, substantially square pixel electrodes 220A serving also as reflectors made of Al (aluminum) or the like are arranged in a matrix in a matrix so that the pixel electrodes 220A are not formed. In the portion, the scanning lines and the data lines (not shown) are arranged so as to cross each other vertically and horizontally. Although not shown, a thin film transistor (hereinafter, referred to as T) is provided near the intersection of the scanning line and the data line.
FT: Thin Film Transistor) is formed, and the pixel electrode 220A is formed on the drain electrode of each TFT.
Is connected. The data lines are connected to the source electrodes of the TFTs, and the scanning lines are connected to the gate electrodes, so that the voltage applied to the pixel electrodes is controlled by each TFT.

The upper substrate 160 is a transparent glass substrate, and a color filter 170 is formed on the liquid crystal side surface of the upper substrate 160. A transparent electrode 180 made of ITO is formed on the color filter 170 over the entire display area. Is formed.

In this case, the pixel electrode also functions as a reflector, and the metal used therefor is Ni in addition to Al.
Any metal having high reflectivity such as (nickel), Cr (chromium), or an alloy thereof may be used. Further, a reflector made of a metal such as Al, Ni, or Cr can be provided on the surface of the pixel electrode separately from the pixel electrode. In addition, the pixel electrode is
It is also possible to provide a transparent electrode made of O or the like, make the lower substrate a transparent glass substrate, and then provide one reflector on the back side (the lower side in the figure) of the lower substrate 210A. In the case of monochrome display, the color filter 170 becomes unnecessary.

After forming the above-described color filters and electrodes on each substrate, an alignment film made of polyimide is formed, and alignment processing is performed in a predetermined direction.
Thereafter, the surfaces on which the electrodes are formed are opposed to each other, and are bonded to each other with a sealing material 200 while maintaining a predetermined gap, and the liquid crystal 190A is sandwiched between the lower substrate 210A and the upper substrate 160. Here, as the liquid crystal material and the orientation direction thereof, a liquid crystal material having a condition of using only one polarizing plate as described in JP-A-3-223715 is selected.

Further, a retardation plate 150 and a polarizing plate 140 are formed on the outer surface of the upper substrate 160. Note that a plurality of retardation plates 150 may be provided as necessary, or a configuration without the retardation plate may be employed. It is also possible to dispose a phase difference plate having a different phase difference depending on display characteristics, a phase difference plate for compensating a viewing angle, and the like.

As described above, the reflection type liquid crystal panel 3
20 is configured.

Next, the illumination means 310 will be described.

In the present embodiment, a glass support plate 120 having a thickness of 0.2 mm is disposed above the liquid crystal panel, and an organic E (lower surface in FIG.
The light emitting portion 100 formed by L is formed. The light emitting section 100 is formed in a lattice shape at a portion between the pixels of the liquid crystal panel, that is, in an active matrix type, at a portion overlapping the data line and the scanning line when the liquid crystal panel is viewed from above, and constitutes the illumination means 310. I do.
Preferably, the light-emitting portion is formed so that the light-emitting portion does not overlap with the pixel electrode when viewed from the liquid crystal panel. With this configuration, a reflective region can be secured without reducing the display region, and thus a bright reflective liquid crystal device can be obtained.

The illumination means 310 constructed as described above.
Are bonded together with an adhesive 130 with the surface on which the light emitting section 100 is formed and the polarizing plate 140 facing each other.
The light transmissive member 110 is formed in a portion sandwiched between the light transmitting member 110 and the light transmitting member 110. The light transmitting member 110 serves to prevent reflection of external light on the surfaces of the support plate 120 and the polarizing plate 140, and emits light by adsorbing moisture to the light emitting portion 100 formed of an organic EL described later. It is used for the purpose of preventing the service life from being impaired. Therefore, as the material, a material having a refractive index of about 1.5, which is the same as that of the glass substrate forming the support plate, and not transmitting moisture is desirable. For example, an epoxy resin or the like can be used.

When the liquid crystal panel is small, such as a diagonal of about 2 inches or less, or when a strong adhesive strength is not required between the lighting device 310 and the liquid crystal panel 320, the light-transmitting resin is used without using the adhesive 130. 110, the liquid crystal panel 320
It is also possible to fix the lighting device 310 to the light source.

Here, an example of the pattern of the light emitting section 100 is shown in FIG. 3 and FIG. These drawings show the liquid crystal device of the present example when viewed from the display observation surface.

FIG. 3 shows a light emitting section 100 for emitting the same color light.
Is formed, and reference numeral 500 denotes the liquid crystal panel 3.
Reference numeral 510 denotes a unit pixel formed on the light emitting unit 20 and a pattern of the light emitting unit 100 formed on the illumination unit 310. FIG. 3A shows a case where the light-emitting portions are all provided in the lattice-shaped region between the pixels. According to such an arrangement of the light emitting units, the irradiation efficiency is highest, and the display surface is brightest when the illumination unit is used. However, when the display is viewed from an oblique direction, the light emitting unit and the pixel electrode overlap. As a result, the substantial area of the pixel opening is reduced, and the visibility when viewing the display may be impaired by the reflection of external light.

FIG. 3B shows the case where the light emitting portions are provided in the form of vertical stripes, and FIG. 3C shows the case where the light emitting portions are provided every other vertical stripe. Even with such an arrangement of the light emitting portions, it is possible to secure sufficient brightness to obtain visibility in a dark place, and it is possible to reduce the area of the light emitting portions as compared with the case of FIG. Therefore, even when the display is viewed from an oblique direction, the area of the opening of the pixel does not decrease and the visibility is not impaired.

Although not shown in the drawings, the light-emitting portions 100 may be formed so as to be scattered in the above-described formation region. Although the vertical stripe pattern has been described, it goes without saying that the same applies to the horizontal stripe pattern.
The pattern shape of the light emitting unit may be determined so that a sufficiently bright display can be obtained from the relationship between the allowable power consumption and the display quality.

Although the case where the light emitting section emits a single light emitting color has been described above, it is also possible to change the light emitting color of the light emitting section for each minute area. For example, when the display is viewed by reflection of external light by a combination of a monochrome reflective liquid crystal display body without using a color filter and an illuminating means having several types of light-emitting portions having different emission colors, the liquid crystal display device is in a bright monochrome state. When the display is viewed using a lighting device with a dark surroundings, color display can be performed using the red, blue, and green illumination allocated to each pixel. Also, when a color filter is formed in each pixel so that a color display is obtained even when the display is viewed by reflection of external light, the emission color of each pixel is adjusted according to the color tone displayed by each pixel, that is, the transmission color of the color filter. By arranging different light emitting units, it is possible to display a more vivid color when illuminating.

FIG. 4 (a) shows an embodiment in which a light emitting section which emits a plurality of light emitting colors is provided. The figure is a view when the liquid crystal panel is viewed from the display observation surface, and the color filters are formed in a vertical stripe shape. In the figure, R, G, and B indicate pixels on which red, green, and blue color filters are formed, respectively. Reference numeral 520 denotes a red light-emitting portion forming region made of an organic EL, and 530 denotes a green organic EL.
The formation region 540 of the light emitting portion made of L is a formation region of the light emitting portion made of the organic EL exhibiting blue.

FIG. 4B is a cross-sectional view taken along the line AA ′ of FIG. The pixel in which the red color filter 170R is disposed has a light emitting unit 100R that emits red light. When the color tone of the color filter corresponding to the pixel and the emission color of the light-emitting portion are made the same, not only when illuminating, it is possible to display with a clearer color tone than when seeing with external light reflection, but also to emit light. Since light is efficiently used for lighting, it is advantageous for low power consumption.

FIG. 2A shows a specific example of the structure of the light emitting section 100. The low reflection layer 103 made of Cr oxide is formed on the support plate 120 with a thickness of 100 Å to 1000 Å.
The first electrode 102 made of an Al—Li alloy has a thickness of 300 to 2,000 Å, the organic EL layer 101 has a thickness of 1500 to 10,000 Å, and the second electrode 104 made of ITO has a thickness of Å. The light emitting unit 100 is formed by being laminated at 1,000 Å to 3000 Å. Here, the Al-Li alloy electrode 102 serving as the first electrode also serves as a reflector for directing all light emitted isotropically from the organic EL layer 101 toward the liquid crystal panel.

The low-reflection layer 103 and the first electrode 102 are formed by forming a film of Cr oxide or an Al—Li alloy by a sputtering method, and patterning the film by a photolithography process. Organic E which actually contributes to light emission
The L layer 101 is formed by a mask evaporation method or an organic EL formed into droplets.
The material is formed on the first electrode by an inkjet method in which a material is ejected from a minute nozzle to form a pattern. IT
The second electrode 104 made of O can be formed by patterning by a mask evaporation method.

The low reflection layer 103 is formed for the purpose of preventing the light incident from the side of the support plate 120 from being reflected by the first electrode 102 to reduce the contrast. Therefore, when the reduction in contrast due to external light reflection at the first electrode does not cause a problem, for example, because the light emitting unit pattern area is small, the low reflection layer 103 can be omitted.

Regarding the cross-sectional shape of the pattern, in order to prevent the second electrode and the first electrode from being directly electrically short-circuited due to the pattern shift, as shown in FIG.
01 to cover the first electrode 102 or FIG.
As shown in (c), the second electrode 104 is made thinner than the first electrode 102 and the organic EL layer 101. Here, FIG.
When the first electrode 102 is covered with the organic EL layer 101 as in (b), it is not necessary to pattern the second electrode 104, and for example, the second electrode can be formed on the entire surface of the support substrate 120. become.

When a predetermined voltage is applied between the first electrode 102 and the second electrode 104, the organic EL layer 101 interposed therebetween emits light. In the case of an organic EL, the magnitude of the voltage required to obtain the required illuminance is 2 to 10 DC.
About V.

When an organic material capable of forming droplets such as a polymer material is used for the organic EL layer, the organic EL layer can be formed by an ink jet method. According to this, the light emitting unit 100 can be formed relatively easily even when a light emitting unit that emits a plurality of different emission colors in a lattice pattern is formed. For example, in the case of a lattice-shaped pattern as shown in FIG. 3A, a pattern cannot be formed by one-time evaporation in the mask evaporation method, but according to direct drawing of the organic EL material by the ink-jet method, A complicated pattern can be formed. In addition, even when a light-emitting portion that emits red, green, or blue as shown in FIG. 4 is selectively formed, a light-emitting portion having a different light-emitting color from place to place can be easily formed by ink-jet coating. At this time, for example, each light emitting layer 101 can be formed using cyanopolyphenylene vinylene for the red light emitting material, polyphenylene vinylene for the green light emitting material, and polyphenylene vinylene and alkylphenylene for the blue light emitting material.

Even when a plurality of light emitting materials are used, the first electrode and the second electrode can be used in common, so that the organic E
The forming process other than the L layer is the same as the case of the single color. Further, as described above, the second electrode, which is a transparent electrode, can be formed over the entire surface of the support plate if attention is paid to an electrical short circuit with the first electrode.

The configuration of the liquid crystal device according to the present embodiment has been described above. Hereinafter, a method of using the illumination means in the liquid crystal device according to the present embodiment will be described.

In the liquid crystal device of the present embodiment, normally, only the liquid crystal panel is driven without using any illuminating means, and the display is visually recognized using external light such as natural light. When the display cannot be obtained, the lighting means is used by lighting.

In FIG. 2, when the switch of the lighting means is turned on, the first electrode 102 constituting the light emitting section 100 is
A voltage is applied between the second electrodes 104, and color light is emitted from the light emitting layer 101 made of organic EL. Here, the light emitting layer 10
Although light is emitted isotropically from 1, the light emitted to the first electrode side is reflected there because the first electrode formed on the observer side also serves as a reflector, and as a result, most of the light is emitted. Light is emitted substantially downward.

Here, as shown in FIG.
When 0 is mounted on the reflective liquid crystal panel 320, if the liquid crystal transmits light (white display), the emitted light enters the liquid crystal panel and is reflected by the pixel electrode 220A also serving as a reflector. Then, the light reaches the observer through a transparent support plate forming the liquid crystal panel and the illumination device 310. If the liquid crystal is in a light-shielded state (black display), the light emitted from the illumination device is blocked by the liquid crystal panel and does not reach the observer.

As described above, the present invention has been specifically described based on the embodiments. However, the present invention is not limited to the embodiments.

For example, in the above-described embodiment, a liquid crystal device in which only one polarizing plate is disposed has been described. However, two polarizing plates are disposed so as to sandwich the liquid crystal panel, and a reflecting plate is provided outside the polarizing plate on the back side. May be provided as a liquid crystal device.

A liquid crystal panel without a polarizing plate can also be constructed. That is, a liquid crystal panel in which a composite layer composed of liquid crystal and a polymer is sandwiched between a pair of substrates does not require a polarizing plate, and can perform display in a light transmitting state and a light scattering state.

Further, the present invention can be applied to a GH (guest-host) reflection type liquid crystal liquid crystal display device using a dichroic dye.

FIG. 5 shows an example of a configuration in which the present invention is applied to a liquid crystal device of a two-polarizer type using the reflection STN system. In this embodiment, the liquid crystal panel does not have a color filter,
This example illustrates a monochrome type.

In FIG. 5, a polarizing plate 230 is bonded to the back surface (lower surface in the figure) of the transparent lower substrate 210B, a reflecting plate 240 is bonded to the polarizing plate 230, and a liquid crystal side surface of the lower substrate 210B is bonded to the lower substrate 210B. A transparent electrode 220B made of ITO or the like and patterned in a stripe shape is arranged. On the other hand, on the liquid crystal side of the transparent upper substrate 160, a stripe-shaped transparent electrode 180 made of ITO and patterned in a direction perpendicular to the transparent electrode 220B provided on the lower substrate is formed. An alignment film made of polyimide (not shown) is formed on the innermost portion of each substrate, and is subjected to an alignment process. A nematic liquid crystal 190B having a positive dielectric anisotropy is provided between the two substrates 160 and 210B.
Is adjusted and injected so as to be stable in a state of being twisted approximately 270 degrees. Front side of upper substrate 160 (upper surface in the figure)
Includes a retardation plate 150 for phase compensation and a polarizing plate 1
40 are installed. The lighting device 310 including the support plate 120 and the light emitting unit 100 is installed thereon.

Light emitted from the illuminating means enters and is reflected as indicated by the arrow in FIG. 5, and transmission and absorption are controlled by the liquid crystal and the polarizing plate to perform display. For this reason, in the above-described embodiment, the pixel electrode 220A also serves as the reflection electrode. However, in this embodiment, the electrode 220B is a transparent electrode and a striped electrode. Further, the lower substrate 210B is also formed as a transparent substrate.

In this case, as the color exhibited by the light emitting section 100, various colors such as a green system and a red system can be used in addition to a color close to white. At the time of illumination, the display is visually recognized by the combination of the black color due to light absorption and the emission color of the light emitting unit.

FIGS. 6 and 7 show another configuration example of the liquid crystal device to which the present invention is applied. The configuration of the liquid crystal device shown in this embodiment is shown in FIG.
Since the configuration is almost the same as that shown in FIG. 2 and only the formation position of the illumination means is different, the description of the formation other than the illumination means is omitted.

In FIG. 6, a light emitting section 100 is formed in a predetermined pattern on the back surface of the liquid crystal panel (lower substrate 210B). In this embodiment, the lower substrate 210B is also used as a support plate. The lower substrate 210B and the polarizing plate 230 are bonded together with a sealant to form the light transmitting member 110 inside, thereby forming an illumination unit. The light emitted from the illuminating means first enters the polarizing plate 230, is reflected by the reflecting plate 240, passes through the polarizing plate 230 again, and enters the liquid crystal. This light is controlled by the liquid crystal and the polarizing plate on the emission side to perform display.

In FIG. 7, an illuminating means is provided between the pixel electrodes 220B formed on the lower substrate 210B. Such a structure can be realized by forming the light emitting unit 100 in the manufacturing process of the lower substrate 210B. In this case, it is desirable that the light emitting unit 100 be isolated from a liquid crystal or the like by a protective layer 250 such as SiO ₂ for ensuring reliability. The light emitted from the illuminating means is reflected by the reflecting plate 240 as shown by the arrow in FIG. 7, and is controlled by the liquid crystal and the polarizing plate to perform display.

According to the embodiment shown in FIGS. 6 and 7, since the optical path from the time when light is emitted from the organic EL light-emitting layer to the time when the light reaches the observer is shorter than that in the embodiment shown in FIG. Light absorption can be suppressed, and a bright display can be obtained. Further, since there is no illumination device on the surface of the liquid crystal panel, there is no deterioration of display when displaying by normal reflection of external light.

Some examples of the location of the light-emitting portion have been described. When the light-emitting portion is combined with a liquid crystal panel using a polarizing plate, it is important that the light emitted from the light-emitting portion is prevented from entering the liquid crystal layer. That is, the polarizing plate and the light emitting section are arranged so as to be in a polarization state once.

Here, in the embodiment shown in FIG. 2 and the like, the light emitting layer 101 is bonded to the support plate 120 via the first electrode 102 or the low reflection layer 103. For example, an illuminating means is provided above the liquid crystal panel. When provided, the light emitting layer 101 is formed in a predetermined pattern on the outer surface of the polarizing plate via the second electrode 104, and the first electrode 102 and the low reflection layer 103 are further formed thereon in a predetermined pattern. Is also good. In this case, it is not necessary to use a support plate. However, it is necessary to separately form a protective film on the surface in order to protect the organic EL layer forming the light emitting portion from moisture and the like.

FIG. 8 shows an example in which the present invention is applied to a liquid crystal device having a touch panel. FIG. 8 is a cross-sectional view of a main part showing a configuration of a capacitive touch panel and a lighting unit.

In the liquid crystal device having the touch panel according to this embodiment, the upper surface of the illuminating means, that is, the surface of the support 120 is
The entire surface is uniformly covered with a transparent conductive film 810 having a predetermined sheet resistance value serving as a touch position detecting element, and a flexible printed board (touch position detecting circuit) 820 having the transparent conductive film 810 and a detecting circuit is provided. Plural electrode terminals 83
0 and are electrically connected to each other. A protective film may be formed on the surface of the transparent conductive film in some cases. A frame-shaped portion 840 having an opening of a predetermined size is provided in an outer case of the device, and an inner portion thereof serves as a touch region 850 exposed to the outside. This touch area 850
When a finger or the like touches an arbitrary point on the transparent conductive film 810, the transparent conductive film 810 is grounded via the capacitance of the human body at the touched point, and a change occurs in the resistance value between each electrode terminal 830 and the ground line. . This change is detected by the touch position detection circuit 820, whereby a point (coordinate) on the display screen is displayed.
Is entered.

As described above, for example, the light emitting section 100 is provided on the front side of the substrate constituting the liquid crystal panel, and a transparent electrode plate for forming the second electrode is provided on the entire display area by one transparent electrode plate. By providing the light emitting unit 1 as an electrode,
The transparent conductive film 810 can be used instead of the transparent electrode plate No. 00.

FIG. 9 shows an example of an electronic apparatus provided with the liquid crystal device of the present invention. Reflective PDA (Personal Digital Assistant, equipped with the liquid crystal device of the present invention as a display)
Portable information terminal).

Reference numeral 700 denotes a PDA main body, and a display 710 is provided on the front of the PDA main body.
0 is a liquid crystal device according to the present invention. This P
When the DA is used at night or in a dark room, by turning on the switch of the lighting device, the lighting means composed of the organic EL is activated and a bright and clear display can be obtained.

[Brief description of the drawings]

FIG. 1A is a plan view and FIG. 1B is a cross-sectional view illustrating a schematic configuration of a liquid crystal device according to the present invention.

FIG. 2 is an enlarged view of a light emitting unit made of an organic EL.

FIG. 3 is a pattern diagram of a light emitting unit that emits the same color light.

FIG. 4 is a formation pattern diagram of a plurality of light emitting units that emit different color lights.

FIG. 5 is a cross-sectional view of a two-polarizer type liquid crystal device showing an outline of the illumination means of the present invention.

FIG. 6 is a cross-sectional view of another two-polarizer type liquid crystal device schematically showing the illumination means of the present invention.

FIG. 7 is a cross-sectional view of another two-polarizer type liquid crystal device schematically showing the illumination means of the present invention.

FIG. 8 is a sectional view of a main part showing a configuration of a capacitive touch panel and a lighting unit.

FIG. 9 is an electronic apparatus (PDA) including the liquid crystal device of the present invention.
FIG.

FIG. 10 is a schematic configuration diagram of a conventional front panel.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 light emitting unit 101 organic EL layer 102 metal electrode (first electrode) 103 low reflection layer 104 transparent electrode (second electrode) 110 light transmissive member 120 support plate 130 adhesive 140 polarizing plate 150 retardation plate 160 upper substrate (transparent Glass substrate) 170 Color filter 180 Transparent electrode 190A, 190B Liquid crystal 200 Sealant 210A Lower substrate 210B Lower substrate (Transparent glass substrate) 220A Pixel electrode (Reflective electrode) 220B Pixel electrode (Transparent electrode) 230 Polarizer 240 Reflector 250 Protective layer 310 illuminating means 320 liquid crystal panel 500 unit pixel 510 light emitting part forming area

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Claims (14)

[Claims] 1. A liquid crystal device comprising at least a liquid crystal panel in which liquid crystal is sandwiched between a pair of substrates, and lighting means having a light emitting portion in which a light emitting layer is formed between a pair of electrodes. 2. The liquid crystal device according to claim 1, wherein the light emitting units are arranged in a predetermined pattern on a support plate constituting the lighting unit. 3. The liquid crystal panel according to claim 1, wherein a plurality of pixel electrodes arranged in a matrix are provided, and the light emitting section is arranged at a portion between the pixel electrodes. Item 3. The liquid crystal device according to any one of Items 1 to 2. 4. The liquid crystal device according to claim 3, wherein the light emitting unit is formed so as not to overlap the pixel electrode in a plane. 5. The liquid crystal device according to claim 1, wherein the lighting unit is provided on a viewing side of the liquid crystal panel. 6. The liquid crystal device according to claim 1, wherein a low reflection unit is provided on a viewing side of the light emitting unit. 7. The liquid crystal device according to claim 1, wherein the light emitting section emits a plurality of different emission colors. 8. The liquid crystal device according to claim 7, wherein the light emitting portion is formed by being divided into a plurality of regions each having a different emission color. 9. The liquid crystal panel according to claim 1, wherein a color filter including a plurality of color elements is formed on the liquid crystal panel, and the light emitting layer is arranged corresponding to a transmission color of the color filter. 9. The liquid crystal device according to any one of 8. 10. The liquid crystal device according to claim 1, wherein a light transmissive member is formed between the lighting unit and the liquid crystal panel. 11. The liquid crystal device according to claim 1, wherein the liquid crystal panel is a reflection type liquid crystal panel. 12. The liquid crystal device according to claim 1, wherein a touch sensor function is provided on a support plate constituting the lighting unit. 13. The liquid crystal device according to claim 1, wherein an organic electroluminescence element is used for a light emitting layer forming the light emitting section. 14. An electronic device, wherein the liquid crystal device according to claim 1 is fixed to a predetermined position of a device main body to form a display device.