JP2001051613A - Light-emitting material type liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain such a liquid crystal display device that the liquid crystal display can be seen in a dark place even when illumination or the like is not used for a reflection type display, or even when a back light is turned off for a back light type display without using electric power or other energy. SOLUTION: A luminous substance 3 is applied on the back of a liquid crystal part 2 instead of a conventional reflection part or a reflection plate of a back light part. In the device having the luminous substance 3 on the back of the liquid crystal part 2 has the following properties. (1) The luminous substance reflects light to display on the liquid crystal when the ambient is bright. (2) The luminous substance emits light to display on the liquid crystal when the ambient is dark.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a color or monochrome liquid crystal display device.

[0002]

2. Description of the Related Art A general basic structure of a liquid crystal display device has the following laminated structure. First, the monochrome liquid crystal section is aligned with the front polarizing plate, the front glass substrate, the front transparent electrode, the front alignment film, the encapsulated liquid crystal layer, and the front alignment film from the front of the monochrome liquid crystal display at 90 degrees. Different rear alignment film,
The rear transparent electrode, the rear glass substrate, and the front polarizer include a rear polarizer having a polarization direction different from that of the rear polarizer by 90 degrees. In the color liquid crystal section, a color filter is provided between the front glass substrate and the front transparent electrode of the monochrome liquid crystal section, or in front of the front polarizing plate. Based on the monochrome liquid crystal section and the color liquid crystal section, the reflection type liquid crystal display device has a reflection section such as a reflector at the rear of the monochrome liquid crystal section and the color liquid crystal section. The surrounding external light is used to reflect the light so that the liquid crystal display can be seen. In the transmissive liquid crystal display device, the monochrome liquid crystal unit, and, at the rear of the color liquid crystal unit, a fluorescent lamp, a light diffusion polarizing plate, and a backlight unit, which is configured by a reflector, etc., is provided, Regardless of the surrounding brightness, the liquid crystal display can be seen by the light of the fluorescent lamp in the backlight section.

[0003]

However, this has the following problems. In the case of the reflection type, when the surroundings become dark, the liquid crystal display becomes difficult to see, and when it becomes completely dark, the liquid crystal display becomes invisible. However, some devices using a liquid crystal display need to be visible even when it is dark, and some devices do not always look but need to be seen occasionally. Therefore, in order to make the liquid crystal display visible even in a dark place, it was necessary to illuminate the liquid crystal display by providing illumination in front of the liquid crystal display. In addition, there is a method of turning on the lighting only when watching, or a method of turning on a lighting device in a room where the liquid crystal display device is provided. In such a case, the lighting devices are turned on by hand. The operation is cumbersome, the user must go to the switch of the room lighting, and place the liquid crystal display device that he or she wants to see There was a restriction that the user had to go to where the device was. In the case of the transmissive type, the liquid crystal display can be viewed even in a dark place, but since the backlight needs to be lit at all times, electricity is always consumed, and when it is not necessary to see, the liquid crystal display is completely useless. You are consuming energy. For this reason, a power source must be obtained for household electric power and the like, and there is a limit in using a battery type. As an alternative to the liquid crystal display, there is a light emitting diode type, which also consumes power at all times, and consumes more power than a liquid crystal display without a backlight. The present invention solves these problems and, in order to make the liquid crystal display visible, it is possible to view the liquid crystal display even in a dark place without consuming energy such as electricity. That is, a liquid crystal display device. In other words, the present invention utilizes a liquid crystal display with low power consumption, especially in a dark place such as at night, and does not use the backlight or shortens the usage time of the backlight and does not turn on the backlight. However, an object of the present invention is to provide a liquid crystal display device which can view a liquid crystal display without consuming any power or other energy.

[0004]

The structure of the present invention which has solved the above-mentioned problems has the following features. As shown in FIG. 1, a part of the structure is as follows. A liquid crystal display device provided 2) a luminous material is provided in the front part of the liquid crystal part, or between the liquid crystal part and the luminous material, or both.
3) A liquid crystal display device comprising a liquid crystal portion and a backlight portion, wherein a luminous material is provided behind the backlight portion. 4) A front portion of the liquid crystal portion, a liquid crystal portion. The liquid crystal display device according to 3), wherein a light-storing material is provided at any one or at a plurality of places between the backlight unit and the backlight unit and the luminous material. 5) The light-diffusing polarizing plate of the backlight unit stores light. A liquid crystal display device according to 3) or 4), which is formed of a material.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, the present invention provides: (1) a conventional reflection type reflection section at the rear of the liquid crystal section;
A luminous material is provided instead of the reflective part at the rear of the conventional transmissive backlight part. (2) A configuration in which a light storage material is further added to the configuration of (1).
It is what it was. The luminous substance means a substance which emits light such as luminous paint. The method of providing the luminous material at the rear of the liquid crystal section is as follows: (1) The luminous substance such as luminous paint is directly applied to the rear of the liquid crystal section. (2) A luminous substance such as luminous paint is applied to a plate-like material and provided on the rear part of the liquid crystal part. And so on. When the light storage material is provided on the front surface of the liquid crystal portion, it is desirable that the light storage material is transparent or nearly transparent so that the liquid crystal display can be seen clearly. Opaque light-storing material that does not block the light emitted from the light-storing material and the light emitted from the luminous material.

[0006]

[Operation] Since the present invention is configured as described above, the one provided with a luminous material at the rear of the liquid crystal section is as follows: (1) When the surroundings are bright, the luminous material reflects light. , LCD display. (2) When the surroundings are dark, the luminous material emits light and a liquid crystal display is performed. In a liquid crystal display device, a luminous material is provided at the front and rear portions of the liquid crystal portion, and a luminous material is further provided at the rear portion. (1) When the surroundings are bright, the luminous material reflects light, Display. (2) When the surroundings are dark, the luminous material and the luminous material emit light, and a liquid crystal display is performed. A liquid crystal display device comprising a liquid crystal portion and a backlight portion, in which a luminous material is provided at the rear of the backlight portion, is as follows: (1) When the backlight is lit; When the surroundings are bright, the liquid crystal display is performed by the light of the backlight. . Even when the surroundings are dark, liquid crystal display is performed mainly by the light of the backlight. (2) When the backlight is off, When the surroundings are bright, the luminous material reflects light and displays liquid crystal. . When the surroundings are dark, the luminous material emits light and a liquid crystal display is performed. In a liquid crystal display device in which a phosphorescent material is provided between the front and rear portions of a liquid crystal portion, a backlight portion and a luminous material, and a liquid crystal display device in which a light diffusion polarizing plate of a backlight portion is formed of a phosphorescent material, 1) When the backlight is on, When the surroundings are bright, the liquid crystal display is performed by the light of the backlight. . Even when the surroundings are dark, liquid crystal display is performed mainly by the light of the backlight. (2) When the backlight is off, When the surroundings are bright, a luminous material or a luminous material reflects light to display a liquid crystal. . When the surroundings are dark, the luminous material or the luminous material emits light, and a liquid crystal display is performed. As described above, any of the present invention is a reflection-type and transmission-type dual-purpose liquid crystal display device.

[0007]

An embodiment of the present invention will be described with reference to the drawings.
The first embodiment is applied to a liquid crystal digital timepiece.
FIG. 2 is a perspective view of the first embodiment. In the figure, 1
Is a clock body, 2 is a monochrome liquid crystal display, and 3 is a luminous material. At the rear of the monochrome liquid crystal unit 2 of the timepiece body 1, a luminous material 3 in which luminous paint is applied to one surface of a plate-like material is provided. In addition, although not shown, a battery for a power supply, a control device for a liquid crystal display, an auxiliary lamp that can be seen even in a dark place, a time setting button, an alarm dial, and the like are exactly the same as conventional products. . (1) When the surroundings are bright, the surrounding external light passes through the monochrome liquid crystal display unit 2 and is reflected on the surface of the luminous material 3, and this light is reflected by the monochrome liquid crystal unit. 2 and the liquid crystal display is performed. (2) When the surroundings are dark, the luminous material 3 emits light, and the light passes through the monochrome liquid crystal unit 2 to perform liquid crystal display.

The second embodiment is applied to a color liquid crystal display video camera. FIG. 3 is a perspective view of the embodiment of the second embodiment. FIG. 4 is a perspective view of the liquid crystal display unit according to the second embodiment. In the figure, 4 is a video camera, 5 is a color liquid crystal display section, 6 is a color liquid crystal section, 7 is a backlight section, 8 is a fluorescent tube, 9 is a light diffusing polarizing plate, 10 is a luminous material, and 11 is a luminous material. is there. Color liquid crystal display section 5 of video camera 4
The light storage material 11 is provided at the front part and the rear part of the color liquid crystal part 6,
A backlight unit 7 including a fluorescent tube 8 and a light diffusing polarizing plate 9 is provided at a rear portion thereof, and a luminous paint material 10 is further provided at a rear portion thereof. The luminous material 10 is obtained by applying a luminous paint to one surface of a plate-like material. The light storage material 11 of the second embodiment is desirably transparent or nearly transparent so that the liquid crystal display can be seen and does not hinder the passage of light. Further, the light diffusion polarizing plate 8 may be formed of a light storage material. In addition, although not shown, a battery for a power supply, a control device for a liquid crystal display, operation buttons, and the like are exactly the same as conventional products.

With the above configuration, (1) when the fluorescent tube 8 is lit, When the surroundings are bright, the light of the fluorescent tube 8 mainly passes through the color liquid crystal unit 6 to perform liquid crystal display. . Even in the case where the surroundings are dark, the light of the fluorescent tube 8 mainly passes through the color liquid crystal unit 6 to perform liquid crystal display in the same manner as described above. (2) When the fluorescent tube 8 is off, When the surroundings are bright, the surrounding outside light passes through the color liquid crystal unit 6 and is mainly reflected on the surface of the luminous material 10,
Further, the light is partially reflected on the surface of the light storage material 11 and the like, and this light passes through the color liquid crystal unit 6 in the opposite direction to perform liquid crystal display. . When the surroundings are dark, the luminous material 10 and the luminous material 1
1 emits light and a liquid crystal display is performed. As a method of using in a dark place, mainly, the fluorescent tube 8 is not turned on, and the liquid crystal display is viewed with the light emitted from the luminous material 10 or the luminous material 11, so that the luminous amount of the luminous material 10 or the luminous material 11 is small. When the liquid crystal display is difficult to see, the fluorescent tube 8 is turned on manually or automatically by a light amount sensor,
After a certain period of time, the fluorescent tube 8 is turned off, and the liquid crystal display is viewed by the light emission of the luminous material 11 and the light emission of the luminous material 10 which had received the light of the fluorescent tube 8 after that. Thus, power consumption due to lighting of the fluorescent tube 8 can be suppressed. Also, when you are just copying an image,
Without turning on the fluorescent tube 7, the luminous material 10 or the phosphorescent material 11
When the photographing button is pressed halfway, for example, when actually trying to take a picture or when wanting to check the image, the fluorescent tube 8 is turned on. In addition, power consumption can be suppressed.

[0010]

As described above, the present invention is different from the conventional liquid crystal display device in that (1) in the case of a reflection type liquid crystal display device, light emitted from a luminous material or a light storage material is used. A liquid crystal display that can be viewed in a dark place without consuming any energy such as power is realized. (2) In the case of a backlight type, a backlight which occupies most of power consumption is not used at all, or
Since the use time of the backlight can be shortened, the power consumption is mainly for the liquid crystal display only, and the power consumption is extremely low.Therefore, a liquid crystal display device that uses a battery such as a dry battery and that can shine even in a dark place has been developed. It becomes possible. (3) If the surroundings are slightly dim, especially in the case of the reflection type,
Although the liquid crystal display becomes difficult to see, the light emission of the luminous material and the phosphorescent material of the present invention exhibits an effect, and the liquid crystal display becomes easy to see. (4) In this specification, an example of application to a digital clock and a video camera has been described, but a liquid crystal screen of a television, a personal computer, a word processor or the like, a liquid crystal screen of a portable information terminal device, a portable navigator device, an electronic organizer, an electronic dictionary, or the like. , Video tape recorders, CD players, radios, cassette recorders, digital cameras, audiovisual devices such as portable game machines, etc., as well as home and business equipment, as well as other industrial equipment using liquid crystal displays. It can be applied to all kinds of products, and exhibits convenience and energy saving in each field. (5) If the room is darkened and the light from the luminous material, the luminous material, and the backlight becomes obstructive, it is necessary to provide a cover to cover the liquid crystal part, or to make the liquid crystal display part openable and closable. The normal and white polarizers are arranged so that light can be transmitted and the liquid crystal display surface looks white in a state where nothing is applied (state where no current is flowing). If the "normal black type" is used instead of the "expression", only the display portion of the liquid crystal shines, so that this method can also solve the problem. Further, a mask may be provided at the front portion, which has an opening at the segment portion of the liquid crystal display and covers the entire surface of the portion other than the segment.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a perspective view of an embodiment of the first embodiment.

FIG. 3 is a perspective view of an embodiment of a second embodiment.

FIG. 4 is a perspective view of a liquid crystal display unit according to a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clock main body 2 Monochrome liquid crystal display part 3 Luminous material 4 Video camera 5 Color liquid crystal display part 6 Color liquid crystal part 7 Backlight part 8 Fluorescent tube 9 Light diffusion polarizing plate 10 Luminescent material 11 Luminescent material

Claims (5)

[Claims] 1. A luminous material is provided at a rear portion of a liquid crystal unit.
Liquid crystal display 2. The liquid crystal display device according to claim 1, wherein a light storage material is provided at one or both of a front portion of the liquid crystal portion and a portion between the liquid crystal portion and the luminous material. 3. A liquid crystal display device comprising a liquid crystal portion and a backlight portion, wherein a luminous material is provided at a rear portion of the backlight portion. 4. The light-accumulating material according to claim 3, wherein a light-storing material is provided at one or more of the front part of the liquid crystal part, between the liquid crystal part and the backlight part, between the backlight part and the luminous material. Liquid crystal display 5. The liquid crystal display device according to claim 3, wherein the light diffusion polarizing plate of the backlight portion is formed of a light storage material.