JPH0862600A - Liquid crystal display device - Google Patents

Abstract

PURPOSE: To obtain display which is different from liquid crystal display on the display screen of a liquid crystal display cell and to make the color of the distinct display different from the color of the liquid crystal display. CONSTITUTION: The liquid crystal display cell 22 is set at an aperture part on the upper surface of a case 21, and a lighting device constituted of a light source 24, a light transmission member 23 and a diffusion sheet 25 is arranged on the back surface side. The member 23 is formed in a state where it becomes gradually thin toward right side, and the bottom surface 21a of the case 21 is similarly inclined. A light emitting means 31 constituted of a light emitting diode 32 and a small light transmission body 33 is provided on an excess space S between the bottom 21a and a substrate B. The light emitted from the diode 32 and guided to the small light transmission body 33 is transmitted through the cell 22 and can be visualized. Almost all the part of the screen of the cell 22 is lightened to be the color of the light source 24, and is irradiated with the light from the light emitting diode 32, so that multicolor display can be performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device for displaying driving states of in-vehicle electronic equipment and other electronic equipment, and more particularly to a display surface of a liquid crystal display cell capable of partially emitting light. The present invention relates to a liquid crystal display device.

[0002]

2. Description of the Related Art FIG. 8 is a schematic sectional view showing the structure of a liquid crystal display device provided in various electronic devices. In this liquid crystal display device, a liquid crystal display cell 2 is installed in an opening above a case 1 fixed to a printed circuit board B. This liquid crystal display cell 2 is a light transmission type and has a transparent electrode formed thereon.
A liquid crystal material is enclosed between a pair of glass substrates, and a polarizing layer and the like are further provided. The liquid crystal display cell is, for example, a twist nematic type positive display type, and when a voltage is applied between the transparent electrodes, the transparent electrode portion becomes opaque and the portion other than the transparent electrode becomes light transmissive. Depending on the shape of the transparent electrode, numbers, characters, symbols, or other characters are displayed.

An illuminating device (backlight) is provided inside the case 1 so as to face the back surface of the liquid crystal display cell 2 and illuminate the entire or almost the entire display surface of the liquid crystal display cell 2. This illuminating device includes a light guide member 3 formed of a transparent or semitransparent translucent material such as an acrylic resin, a light source 4 provided on the left side of the light guide member 3 in the drawing, and a liquid crystal display cell 2. The diffusion sheet 5 is arranged between the optical member 3 and the light member 3. The light source 4 is a lamp covered with a translucent cap of a color such as green or orange.
It emits light of each color. The diffusion sheet 5 is formed of a milky white plate or sheet, a transparent plate or sheet whose surface is roughened like frosted glass, or the like. In addition, the boundary surface between the bottom surface 1a of the case 1 and the light guide member 3 is provided with a reflection film or has an uneven shape capable of irregularly reflecting light. The light guide member 3 has a shape that becomes thinner as the distance from the light source 4 increases, so that the entire surface of the liquid crystal display cell 2 can be illuminated with a substantially uniform amount of light.

[0004]

In the liquid crystal display device having the above configuration, the color of the light transmitting portion on the display surface of the liquid crystal display cell 2 is determined by the illumination device. That is, the color of the light transmitting portion of the liquid crystal cell 2 is unified with the color emitted from the light source 4, and the non-transmitting portion to which a voltage is applied to the transparent electrode becomes almost black. Therefore, the display color of the entire display surface of the liquid crystal display cell 2 is monotonous, the display contents of the plurality of types are all uniform, and it is difficult to make only a specific display stand out. In addition, one of the glass substrates of the liquid crystal display cell 2 is provided as one capable of multicoloring displayed characters and figures.
There is a color filter provided with a transparent electrode. However, the liquid crystal display cell provided with this coloring filter is very expensive because the film forming process of the coloring filter is complicated.

The present invention has been made to solve the above-mentioned problems and has a simple structure that enables the display surface of a liquid crystal display cell to perform a light emission display different from the liquid crystal display, and when an illumination device is used, It is an object of the present invention to provide a liquid crystal display device capable of partial display in a color different from that of an illumination device.

[0006]

According to the present invention, there is provided a liquid crystal display device comprising a liquid crystal display cell in which a liquid crystal material is enclosed between two substrates having transparent electrodes formed thereon. In addition, a light emitting means for partially illuminating the display surface of the liquid crystal display cell is provided.

In this basic means, the liquid crystal display cell may be of a reflection type having a light reflection layer on the back side, or the liquid crystal display cell may be of a light transmission type and an illuminating device ( A backlight) may be provided. In the case of the reflection type, the light reflection layer is provided in a portion other than the region where the light emitting means faces the liquid crystal display cell.
Further, in a device including an illumination device, the light emitting means is provided so as to penetrate a part of the illumination device. Further, the small light emitting means can illuminate the small circle area of the display surface, or the shape area of the arrow shape or other figures can be made to partially emit light.

Further, according to the present invention, a transparent electrode is formed.
A liquid crystal display device comprising a transmissive liquid crystal display cell in which a liquid crystal material is sealed between a plurality of substrates, and an illuminating device for illuminating the entire surface of the liquid crystal display cell from the backside, wherein the liquid crystal display cell is separate from the illuminating device. Is provided with a light emitting means for partially illuminating the display surface.

That is, in the case where the illumination device (backlight) is provided, the light emitting means is separate from the illumination device. Therefore, multicolor display is possible by making the color of the light given to the liquid crystal display cell by the illumination device different from the color of the light emitted from the light emitting means.

When the above illumination device is provided, the illumination device is
The light emitting means is composed of a light source and a light guide member that becomes thinner as the distance from the light source increases, and the light emitting means includes a light emitting source provided on the back side of the light guide member in a thin portion of the light guide member, and a light source connected to the light emitting source. A small light guide that penetrates the inside of the optical member and faces the back surface of the liquid crystal display cell. This small light guide is, for example, an optical fiber.

Further, when the liquid crystal display cell is of a positive display type which transmits light when no voltage is applied, the light emitting means is arranged in a portion where the transparent electrode is not formed.

When the liquid crystal display cell is a negative display type which transmits light when a voltage is applied, the light emitting means is arranged in the portion where the transparent electrode is provided. That is, even in the case of the negative display type, the light emitting means is arranged in the light transmitting region.

[0013]

In the above means, the light emitting means provided on the back side of the liquid crystal display cell partially illuminates the liquid crystal display cell so that the display surface of the liquid crystal display cell is different from the liquid crystal display. Light emission display can be performed. For example, when the liquid crystal display cell is a reflection type, the color of the display surface of the liquid crystal display cell is a grayish color in which room light or the like is reflected from the reflective layer and transmitted through the liquid crystal display cell. Such partial illumination display can be made conspicuous by performing proper illumination, and the partial illumination display can be red or green. In the case where an illuminating device (backlight) is provided on the back surface side of the liquid crystal display cell, the color of light transmitted through the display surface of the liquid crystal display cell is determined by the color of the light of the backlight. In this case, multicolor display is possible by making the color of the light emitted from the light emitting means different from that of the backlight.

Further, changes in the characters and symbols displayed on the liquid crystal display cell depend on the cycle of fluctuations of the voltage applied to the transparent electrode of the liquid crystal display cell. The luminescent display can be lit and displayed in a cycle that is irrelevant to the fluctuation cycle of the voltage applied to the transparent electrode of the liquid crystal display cell. For example, it is assumed that the characters and symbols displayed on the liquid crystal display cell change slowly, and when the light emitting means is blinked in a fast cycle, a display that rapidly blinks partially appears on the display surface of the liquid crystal display cell, resulting in a conspicuous display. It is possible to display the part to which attention is directed.

In the case where an illuminating device (backlight) is provided on the back surface of the liquid crystal display cell, the light guide member of the backlight is usually made thinner as the distance from the light source increases, so that the amount of light of the backlight given to the display surface can be reduced. Uniformity is achieved. Therefore, on the back surface side (the side opposite to the liquid crystal display cell side) of the thinned light guide member, a dead space which has not been used conventionally is formed. If the light source of the light emitting means is provided in this dead space and a small light guide such as an optical fiber is provided through the light guide member of the backlight,
By providing the light emitting source, the entire liquid crystal display device does not become large, and the liquid crystal display device becomes small.

When the liquid crystal display cell is of a positive display type, since the part where the transparent electrode is not provided is the light transmitting region, the light emitting means is provided in this part. The display light emitted from the light emitting means and guided by, for example, the small light guide is transmitted through the light transmitting region and is visually observed.

When the liquid crystal display cell is of a negative display type, the portion where the transparent electrode is provided serves as a light transmitting area when a voltage is applied. If the light emitting means is opposed to this portion and a voltage is applied to the transparent electrode and the light emitting means is caused to emit light, the region corresponding to the shape of the transparent electrode has a color different from that of the portion provided with another transparent electrode. It emits light, which enables multicolor character display.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing a liquid crystal display device according to the present invention, a cross-sectional view taken along the line I-I in FIG. 2, and FIG. 2 is a front view showing a nose part of an on-vehicle audio equipment equipped with the liquid crystal display device of the present invention. FIGS. 3, 3 and 4 are enlarged front views for explaining the operation of the liquid crystal display device of the present invention, FIG. 3 shows a state in which no voltage is applied to the electrodes, and FIG. The state is shown. 5A and 5B are enlarged cross-sectional views of the liquid crystal display cell shown in each example. The liquid crystal display device 20 shown in FIG. 1 is mounted on the nose portion 10 of a vehicle-mounted acoustic device as shown in FIG. 2, for example. Nose part 1
0 is provided in the front part of the device body of the vehicle-mounted audio device. The nose portion 10 has a cassette tape insertion opening 1
1 is open, and various operation button groups 12 are arranged. A liquid crystal display device 20 is provided on the front right side of the nose portion 10 in the figure.

A printed circuit board B shown in FIG. 1 is provided in the nose portion 10, and a case 21 of the liquid crystal display device 20 is attached to the surface of the printed circuit board B. Case 2
1 is made of synthetic resin or the like, and an opening 21d is formed in front of it (upward in FIG. 1). Case 21
A liquid crystal display cell 22 is installed in the opening 21d. The liquid crystal display cell 22 has, as shown in FIG.
Transparent electrodes 41, 4 are provided on the opposite surfaces of the glass substrates 22a and 22b.
1 is provided, a liquid crystal material 22c is enclosed between both glass substrates 22a and 22b, and a polarizing layer is further laminated on the glass substrate. The liquid crystal display cell 22 of this embodiment is a positive display type of twisted nematic system,
When no voltage is applied, the crystal orientation of the liquid crystal material 22c and the polarization layer make it light-transmissive, and when a voltage is applied between the transparent electrodes 41 and 41, that portion becomes light-opaque. The transparent electrode 41 is capable of displaying numbers, for example, in the shape of a seven segment. Further, the liquid crystal display cell 22 is provided with dot-display electrodes 42, 42 positioned between the transparent electrodes 41 of the seven segments and electrodes 43a, 43b for indicating triangular display.

The liquid crystal display cell 22 is a light transmission type, and an illuminating device (backlight) is provided on the back side thereof. This illumination device includes a light guide member 23 formed of a transparent or translucent transparent material such as acrylic resin, a light source 24 located on the left side of the light guide member 23 in the figure, a light guide member 23, and a liquid crystal display. Light diffusion sheet 25 provided between the cell 22 and
It consists of and. The light guide member 23 has a flat surface on the upper surface (front surface) side in the drawing, the entire surface thereof is arranged at an equal distance to the liquid crystal display cell 22, and has a slanted flat surface or a curved surface on the lower surface side (rear surface) in the drawing. The thickness is gradually reduced from the left side to the right side. A thick portion on the left side of the light guide member 23 in the drawing is a concave portion 23b that is open on the printed circuit board B side, and the light source 24 is inserted into the concave portion 23b.

The light source 24 is a lamp whose terminals are soldered to the printed circuit board B, which is covered with a translucent cap colored in green or orange, and emits light of each color. It has become a thing. The bottom surface 21a of the case 21 is formed to be inclined from the left side to the right side in the drawing in accordance with the inclination of the back surface of the light guide member 23. In addition, the entire periphery of the light guide member 23 is also surrounded by the case 21.
The light from 4 is given only to the display surface of the liquid crystal display cell 22. In addition, the bottom surface 21a of the case 21
A reflective layer such as a metal film is provided on the boundary surface between the light guide member 23 and the light guide member 23 so that the light from the light source 24 is reflected toward the liquid crystal display cell 22. Alternatively, an irregular irregular reflection surface may be provided at the boundary between the bottom surface 21a and the light guide member 23.

A through hole 23a is formed in the thin portion on the right side of the light guide member 23 in the figure. The case 21 is integrally formed with a cylindrical wall portion 21c, and the wall portion 21c is inserted and fitted into the through hole 23a of the light guide member 23. The central portion of the cylindrical wall portion 21c of the case 21 is at the light guide member 23.
Is a through hole 21b penetrating in the front-back direction. As shown in FIG. 1, the bottom surface 21a of the case 21 is an inclined surface according to the change in the thickness of the light guide member 23, and the bottom surface 21a and the print are printed on the right side portion in the figure where the light guide member 23 is thin. A surplus space (dead space) S is formed between the substrate B and the substrate. In this embodiment, the light emitting means 31 is provided by utilizing the surplus space S. As shown in FIGS. 3 and 4, the light emitting means 31 has a liquid crystal display cell 22 at two places sandwiching the portion where the transparent electrodes 43a and 43b are provided.
Is provided in the display surface (area in which the liquid crystal material 22c is enclosed).

The light emitting means 31 includes a light emitting diode 32 that emits light such as red and blue, a small light guide 33 formed of an optical fiber, and a light shielding cover 3 that surrounds the light emitting diode 32.
And 4. The light emitting diode 32 and the light shielding cover 34 are fixed to the printed circuit board B, and they are arranged in the surplus space S. The light emitted from the light emitting diode 32 is preferably different from the color of the light emitted from the light source 24 of the illumination device (backlight). For example, the light emitted from the light source 24 of the backlight is green, The emission color is red or orange. Further, as shown in FIG. 3 and FIG. 4, the colors of light emitted from the respective light emitting diodes 32 of the light emitting means 33 provided at two places may be different from each other.

One end of the small light guide 33 is the light emitting diode 3
2 facing the light emitting surface. The small light guide 33 is the case 2
1 passes through the through hole 21b, and the other end surface thereof contacts the back surface of the light diffusing sheet 25 and indirectly contacts the back surface of the glass substrate 22b of the liquid crystal display cell 22, as shown in FIGS. 1 and 5A. They are facing (facing). However, as shown in FIG. 5B, the small light guide 33 passes through the through hole 21b, further penetrates the light diffusion sheet 25, and directly faces the back surface of the glass substrate 22b of the liquid crystal display cell 22. It may be In the embodiment shown in FIGS. 3 and 4, the small light guide 33 has a round cross section. The small light guide 33 is surrounded by the wall portion 21c, and the light transmitted through the small light guide 33 is prevented from escaping to the surroundings. Therefore, the liquid crystal display cell 22 shown in FIGS.
On the display surface of, the cross-sectional shape of the small light guide 33 or the through hole 2
The small circle area corresponding to the cross-sectional shape of 1b is the light emitting means 31.
It becomes a partially illuminated area.

Next, the operation of the liquid crystal display device having the above structure will be described. 3 and 4, for convenience of illustration,
Although the transparent electrodes 41, 42, 43a, 43b are shown by solid lines, these transparent electrodes are difficult to visually recognize when no voltage is actually applied. In the positive display type shown in FIGS. 3 and 4, the transparent electrodes 41, 42, 43
Light does not pass through the portions of a and 43b to which a voltage is applied,
A transparent electrode to which no voltage is applied, and a transparent electrode 41,
A portion where 42, 43a, and 43b are not formed becomes a light transmitting region. A voltage is applied to each transparent electrode from the drive circuit mounted on the printed board B. A tuner, a tape drive mechanism, and other circuits are built in the main body of the device. When the tuning frequency information of the tuner, the operation mode information of the cassette tape, the clock information, etc. are given to the drive circuit, a voltage is applied from the drive circuit to each transparent electrode, and the numbers of seven segments are displayed on the display surface of the liquid crystal display cell 22. Display, dot display by transparent electrode 42, or transparent electrode 43
The arrow display by a and 43b is shown.

In FIG. 4, the light-shielding portion by the transparent electrode to which a voltage is applied is shown by hatching, and in FIG.
The number display of "2.3" and the arrow display showing the right side of the drawing are made. When the light source 24 of the illumination device (backlight) is turned on, the light is guided to the light guide member 23, the light is diffused by the light diffusion sheet 25, and the liquid crystal display cell 22 is illuminated (illuminated) from the back surface. Further, the light guide member 23 becomes thinner as the distance from the light source 24 increases, and the distance between the liquid crystal display cell 22 and the reflective layer provided at the boundary with the bottom surface 21a becomes shorter. Due to the difference in distance from the reflective layer and the light diffusion function of the light diffusion sheet 25, uniform backlight illumination is performed on the liquid crystal display cell 22. As a result, the portion other than the transparent electrode to which the voltage is applied is backlit, and the color of the light of this backlit illumination becomes the color of the light emitted from the light source 24.

Further, a drive circuit different from the one for applying a voltage to the transparent electrode is provided on the printed circuit board B, and the drive circuit causes the light emitting diode 32 to operate on the light emitting diode 32 in accordance with various operation modes on the equipment main body side or instructions from the control circuit. When an electric current is given,
The light emitting diode 32 emits light of a predetermined color. This light is guided to the small light guide 33 and passes through the light diffusion sheet 25 from the end face of the small light guide 33 (FIG. 5A), or does not pass through the light diffusion sheet 25 (FIG. 5 ( B)), provided on the back surface of the liquid crystal display cell 22. This light is emitted by the liquid crystal display cell 22.
When the liquid crystal display device 20 is viewed from the front side, as shown by the hatching in FIG. 4, the portion where the small light guide portion 33 of the light emitting means 31 is provided is provided. Partially illuminated, a circular, partially illuminated display is provided. The color of this partial illumination display is based on the emission color of the light emitting diode 32.
By making the emission color of No. 2 different from the emission color of the light source 24 of the backlight, the circular partial illumination display becomes a color different from the surrounding color. Further, if the light emitting diode 32 is made to blink, only the circular partially illuminated portion will be in blinking display.

The partial illumination display by the light emitting means 31 enables various displays such as a display that the cassette tape is being driven or a warning that the magnetic head needs cleaning. It is also possible to perform partial illumination by only the light emitting means 31 when the light source 24 of the backlight is not turned on and the display surface of the liquid crystal display cell 22 is not illuminated.

Further, in the embodiment of FIGS. 3 and 4, the region partially illuminated by the light emitting means 31 is in the shape of a small circle, but this partial light emitting region is a triangle, an arrow, or another symbol or number. It can also be a character or the like. These indications are the cross-sectional shape of the small light guide 33 or the through hole 21.
It can be determined by the sectional shape of b. In addition, the surplus space S between the bottom surface 21a of the case 21 and the printed circuit board B is
In addition, since the light emitting diode 32 and the light shielding cover 34 which form the light emitting means 31 are provided, it is not necessary to provide a special component installation area for arranging the light emitting means 31, and the liquid crystal display device has the same size as the conventional one. You can

FIG. 6 is a front view showing the display surface when the liquid crystal display cell 22 is of the negative display type of the twist nematic system. In the negative display type, due to the relationship between the crystal orientation of the liquid crystal material 22c and the polarizing layer, the liquid crystal material 22c is in a light-shielding state (light non-transmissive state) when no voltage is applied, and the liquid crystal material 22c passes through the transparent electrode. When a voltage is applied to 22c, that portion becomes a light transmitting region. Figure 6
In, a transparent electrode 41 having a seven-segment structure, a transparent electrode 42 having a dot display, transparent electrodes 43a and 43b having an arrow display, and transparent electrodes 44 and 44 having a small circle shape are provided.

On the back surface of the liquid crystal display cell 22 shown in FIG.
The same illumination device (backlight) as that shown in FIG. 1 is provided. Further, a light emitting means 31 having the same structure as that of FIG. 1 is provided on the back surface of the light guide member 23 of the illumination device. In the embodiment of FIG. 6, the light emitting means 31 is provided at four positions where the transparent electrodes 43a, 43b, 44, 44 are provided. Each light emitting means 31 is provided with a light emitting diode 32 that emits a predetermined color and a small light guide 33. However, as shown in FIG. 7, the end surface of the small light guide 33 has the respective transparent electrodes 43a. , 43b, 44, 44 are opposed to the back surface of the light diffusion sheet 25 or the back surface of the glass substrate 22b of the liquid crystal display cell 22. As shown in FIG. 6, the size of the partially illuminated region illuminated by the end surface of the small light guide 33 is determined by the size of each transparent electrode 43.
It is sufficiently larger than a, 43b, 44, 44, or can overlap most areas of each transparent electrode.

When the negative display type liquid crystal display cell 22 is used, when a voltage is applied to the transparent electrode, this transparent electrode portion becomes a light transmitting region. When the light guide member 23 of the illuminating device faces the back side of the transparent electrode, the light of the light source 24 of the backlight is given to the light transmitting region of the portion of the transparent electrode 41 or 42 to which the voltage is given. . On the other hand, when a voltage is applied to any of the transparent electrodes 43a, 43b, 44, 44 and this portion becomes a light transmitting region, the light emitting diode 32 of the light emitting means 31 facing the transparent electrode is caused to emit light. This light passes through the small light guide 33 and is given from the back side to the portion of the transparent electrode which has become the light transmitting region. In the transparent electrodes 43a and 43b, the triangular regions and the transparent electrodes 44 and 4 are provided.
In No. 4, in the small circle area, partial illumination is performed by the emission color of the light emitting diode 32.

Therefore, the transparent electrodes 41, 42 have the color of the light source 24 of the backlight, and the transparent electrodes 43a, 43
In b and 44, the color of the light emitting diode 32 is obtained. Light source 24
By making the colors of the light emitting diode 32 different from each other, multicolor display is possible. Further, in the embodiment shown in FIG. 6, it is possible to make the light emitting means 32 provided at four places to have different light emitting colors of the light emitting diodes 32, for example, to make the triangular display and the small circle display different colors. Further, when the transparent electrodes 43a, 43b, and 44 are displayed in a blinking manner, the voltage of the transparent electrode may be continuously applied to make the transparent electrode region a light transmitting region and the light emitting diode 32 may be driven to blink. Alternatively, the light emitting diode 32 is continuously turned on,
The voltage from the light emitting diode may be periodically interrupted by intermittently applying a voltage to the transparent electrode.

As described above, when the liquid crystal display cell of the negative display type is used, light emitters of different colors can be arranged at the respective transparent electrode portions, and for example, light emitting means for gradually changing the colors are arranged and the equalizer display is performed. It is also possible to perform multicolor display such as. Further, in the present invention, no illuminating device (backlight) is provided, a reflective layer is formed on the back surface of the liquid crystal display cell 22, and natural light is reflected by the reflective layer and passes through the liquid crystal display cell 22 of positive display type or the like. It may have a reflective structure. In this case, the reflective layer may be partially removed, and the small light guide 33 of the light emitting means 31 may face the removed portion. In this case, only the portion where the light emitting means 31 is provided is a light emitting display, and the other portion is a natural light reflection type display.

[0035]

As described above, according to the present invention, by the light emitted from the light emitting means provided on the back side of the liquid crystal display cell,
A partially illuminated display different from the liquid crystal display can be displayed on the display surface, and the liquid crystal display surface can be in a non-monotonous display state. Further, the blinking display can be easily performed by blinking the light emitting source of the light emitting means.

Further, in the case where the illuminating device (backlight) is provided, the color of the backlight is made different from the color of the partial light emission display by the light emitting means, so that a simple structure is used without using a coloring filter. Multicolor display is possible.

Further, in the case where the light guide member of the illuminating device is gradually thinned, the main parts of the light emitting means can be arranged in a surplus space (dead space) due to the thinned light guide member, and by providing the light emitting means. The device does not become large.

[Brief description of drawings]

FIG. 1 shows a liquid crystal display device of the present invention.
II sectional view taken along the line

FIG. 2 is a front view showing a nose portion of a vehicle-mounted audio device equipped with the liquid crystal display device of the present invention;

FIG. 3 is an enlarged front view of a display surface when the liquid crystal display cell is a positive display type,

FIG. 4 is an enlarged front view of a display surface showing a state in which a voltage is applied to the transparent electrode in FIG.

5A and 5B are enlarged cross-sectional views showing a structure of a liquid crystal display cell according to each embodiment,

FIG. 6 is an enlarged front view of the display surface when the liquid crystal display cell is a negative display type;

7 is an enlarged cross-sectional view showing the structure of the liquid crystal display cell in the embodiment shown in FIG.

FIG. 8 is a sectional view showing a conventional liquid crystal display device,

[Explanation of symbols]

 20 liquid crystal display device 21 case 21a bottom face 21b through hole 22 liquid crystal display cell 22a, 22b glass substrate 22c liquid crystal material 23 light guide member 24 light source 25 diffusion sheet 31 light emitting means 32 light emitting diode 33 small light guide 34 light shielding cover 41 seven segment Transparent electrode 42-point transparent electrode 43a, 43b Triangular transparent electrode

Claims (5)

[Claims] 1. A liquid crystal display device comprising a liquid crystal display cell in which a liquid crystal material is enclosed between two substrates on which transparent electrodes are formed, and a display surface of the liquid crystal display cell is provided on the back side of the liquid crystal display cell. A liquid crystal display device characterized in that a light emitting means for partially illuminating is provided. 2. A liquid crystal display provided with a transmissive liquid crystal display cell in which a liquid crystal material is sealed between two substrates having transparent electrodes formed thereon, and an illuminating device for illuminating the entire surface of the liquid crystal display cell from the back side. The liquid crystal display device is characterized in that, in addition to the illumination device, a light emitting means for partially illuminating the display surface of the liquid crystal display cell is provided. 3. The illuminator comprises a light source and a light guide member that becomes thinner as the distance from the light source increases,
The light emitting means includes a light emitting source provided on the back side of the light guiding member in the thin portion of the light guiding member, and a small light source connected to the light emitting source and penetrating through the light guiding member to face the back surface of the liquid crystal display cell. The liquid crystal display device according to claim 2, comprising a light guide. 4. The liquid crystal display cell is a positive display type which transmits light when no voltage is applied, and the light emitting means is arranged in a portion where a transparent electrode is not formed. The liquid crystal display device according to item 1. 5. The liquid crystal display cell is a negative display type which transmits light when a voltage is applied, and the light emitting means is
The liquid crystal display device according to claim 1, wherein the liquid crystal display device is arranged in a portion where a transparent electrode is provided.