JPH07218903A - Multicolor liquid crystal display element - Google Patents

Abstract

PURPOSE:To enable multicolor display with high panel transmissivity by combining one polarizing plate and a color filter provided with polarizing performance. CONSTITUTION:Concerning the multicolor liquid crystal display element, this is constituted by combining a liquid crystal panel provided with the color filter equipped with the polarizing-performance on one of a pair of glass substrates and one polarizing plate 6, and a liquid crystal layer 5 is sandwiched between this color filter 3 and the polarizing plate 6. Since the lighter display can be provided in comparison with the conventional multicolor display element, low power back light can be used and further, since this element can be also utilized for a reflection type unnecessitating the back light, this element can be applied to a device such as a display device for portable instrument for which low power consumption is required.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to all liquid crystal display devices used for liquid crystal televisions, display devices for personal computers, video display devices, display panels for measuring instruments, game machines, handy terminals, etc. The present invention relates to a multicolor liquid crystal display device that displays more than one color.

[0002]

2. Description of the Related Art FIG. 2 shows an example of a cross-sectional view of a conventional multicolor liquid crystal display element. Conventionally, as shown in FIG. 2, a color filter 9 is provided on one side of the transparent electrodes 7 of a pair of glass substrates 8 provided with the transparent electrodes 7 having a predetermined pattern for the purpose of performing multicolor display. The pair of glass substrates 8 are opposed to each other with a predetermined gap, the liquid crystal material 10 is sandwiched in the gap, and the liquid crystal material 10 is sealed by the sealing material 11. Next, a pair of polarizing plates 12 are placed in a state of sandwiching the pair of glass substrates 8 to form a conventional multicolor liquid crystal display element.

[0003]

In the conventional multicolor liquid crystal display device described in FIG. 2, since a color filter layer and a pair of polarizing plates are used as a means for multicolor display,
The transmittance is extremely low, and it is necessary to use a high-brightness backlight to obtain sufficient panel surface brightness, and it is difficult to apply to devices that require low power consumption, such as display devices for mobile devices. The reflective type, which uses only external light such as sunlight without using a backlight, is advantageous in reducing power consumption, but it has been difficult to apply it because of the low panel transmittance described above. Therefore, an object of the present invention is to improve the transmissivity of a liquid crystal panel and perform multicolor display in order to solve such a conventional problem.

[0004]

In order to solve the above problems, the present invention provides a color filter used in a conventional multicolor display device with a polarizing function, and a liquid crystal cell in which a pair of conventional polarizing plates are used. However, the present invention has a structure in which one polarizing plate is installed on the glass surface of the pair of glass substrates on which the color filter having polarization performance is not formed.

[0005]

In the multicolor liquid crystal display device constructed as described above, since the liquid crystal layer is sandwiched between the color filter having the polarization function and the polarizing plate, the polarization axis of the polarizing plate to be installed and the color filter When the directions of the polarization axes are made parallel or orthogonal, the display color of the liquid crystal panel is displayed with a character color colored by a specified color filter on a nearly colorless background, or a substantially colorless character color on a background colored by a specified color filter. Will be done.

[0006]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a cross-sectional view of a multicolor liquid crystal display device according to the present invention. As shown in FIG. 1, a color filter layer 3 having a polarization function is formed on one side of the transparent electrodes 1 of a pair of glass substrates 2 provided with the transparent electrodes 1 having a predetermined pattern. The color filter 3 is composed of at least one kind, and after a polymer resin in which a dichroic dye is dissolved or dispersed is formed on the transparent electrode 1, an alignment treatment is performed by a rubbing method or the like to have a polarization function. To have. After treatment,
After the pair of glass substrates 2 are opposed to each other and a predetermined gap is provided, the pair of glass substrates 2 are joined by a sealing material 4 and the liquid crystal material 5 is sandwiched in the gap. Next, the polarizing plate 6 was provided only on the side of the pair of glass substrates 2 where the color filter 3 was not formed, and the liquid crystal layer 5 was sandwiched between the color filter 3 and the polarizing plate 6. Thus, the multicolor liquid crystal display device according to the present invention is constructed.

Since the multicolor liquid crystal display device having such a structure has a structure in which a liquid crystal layer is sandwiched between a color filter having a polarizing function and a polarizing plate, the polarizing axis of the polarizing plate to be installed and the polarizing axis of the color filter are installed. That is, when the arrangement directions of the dichroic dyes are made parallel or orthogonal to each other, the display color of the liquid crystal panel is almost colorless on the background of coloring with a predetermined color filter on a substantially colorless background, or on the background of coloring with a predetermined color filter. The character color of will be displayed.
Therefore, if the dyes are three colors of red, green, blue or cyan, magenta, and yellow, multicolor display of eight or more colors can be performed. Also, since only one polarizing plate is used,
Higher transmittance than before can be obtained. As described above, since the multicolor liquid crystal display device according to the present invention has a higher liquid crystal panel transmittance than the conventional multicolor display device and can perform bright multicolor display, a conventional high brightness backlight is used. The increase in power consumption can be eliminated without the need.

(Embodiment 2) FIG. 3 shows an example of a sectional view of a multicolor liquid crystal display device according to the present invention. As shown in FIG. 3, a color filter layer 15 having a polarization function is formed on one side of the transparent electrodes 13 of the pair of glass substrates 14 provided with the transparent electrodes 13 having a predetermined pattern. The color filter 15 is made of at least one kind, and after a polymer resin in which a dichroic dye is dissolved or dispersed is formed on the transparent electrode 13, an alignment treatment is performed by a rubbing method or the like. After the treatment, the pair of glass substrates 14 are opposed to each other,
After a predetermined gap is provided, the pair of glass substrates 14 are joined by the sealing material 16 and the liquid crystal material 17 is held in the gap. Next, the polarizing plate 18 is provided only on the side of the pair of glass substrates 14 where the color filter 15 is not formed, and the liquid crystal layer 17 is sandwiched between the color filter 15 and the polarizing plate 18. Further, a reflective layer 19 is provided on the side of the pair of glass substrates 14 on which the color filter 15 is formed to reflect external light such as sunlight having passed through the polarizing plate 18, the liquid crystal layer 17, and the color filter 15. It is like this. Thus, the multicolor liquid crystal display device according to the present invention is constructed.

Since the multicolor liquid crystal display device thus constructed has a structure in which a liquid crystal layer is sandwiched between a color filter having a polarizing function and a polarizing plate, the polarizing axis of the polarizing plate to be installed and the polarizing axis of the color filter are installed. That is, when the arrangement directions of the dichroic dyes are made parallel or orthogonal to each other, the display color of the liquid crystal panel is almost colorless on the background of coloring with a predetermined color filter on a substantially colorless background, or on the background of coloring with a predetermined color filter. The character color of will be displayed.
Therefore, if the dyes are three colors of red, green, blue or cyan, magenta, and yellow, multicolor display of eight or more colors can be performed. Also, since only one polarizing plate is used,
The light source for illuminating the liquid crystal panel can obtain a brighter display than the conventional one even with external light such as sunlight. As described above, the multicolor liquid crystal display element according to the present invention has a higher liquid crystal panel transmittance than the conventional multicolor display element and can perform bright multicolor display, which is conventionally difficult. It can also be applied to the reflective type.

[0010]

As described in detail in the above embodiments, the multicolor liquid crystal display device according to the present invention has a structure in which a liquid crystal layer is sandwiched between a color filter having a polarizing function and a polarizing plate. When the polarization axis of the polarizing plate and the polarization axis of the color filter, that is, the direction of arrangement of the dichroic dyes are made parallel or orthogonal, the display color of the liquid crystal panel is a character color colored by a predetermined color filter on an almost colorless background, Alternatively, an almost colorless character color is displayed on the background colored by a predetermined color filter. Therefore, the dye is red,
With three colors of green, blue or cyan, magenta, and yellow, multicolor display of eight or more colors can be performed. Further, since only one polarizing plate is used, a higher transmittance than that of the conventional one can be obtained. As described above, the multi-color liquid crystal display device according to the present invention has a higher liquid crystal panel transmittance than the conventional multi-color display device and can perform bright multi-color display. Therefore, it has become possible to apply to devices that require low power consumption, such as display devices for mobile devices.

[Brief description of drawings]

FIG. 1 is an example of a cross-sectional view of a multicolor liquid crystal display device according to the present invention.

FIG. 2 is an example of a cross-sectional view of a conventional multicolor liquid crystal display element.

FIG. 3 is an example of a cross-sectional view of a multicolor liquid crystal display device according to the present invention.

[Explanation of symbols]

 1,7,13 Transparent electrodes 2,8,14 Glass substrate 3,15 Color filter having polarization function 4,11,16 Sealing material 5,10,17 Liquid crystal material 6,12,18 Polarizing plate 9 Color filter 19 Reflection layer

Claims (2)

[Claims] 1. A pair of transparent substrates provided with transparent electrodes are made to face each other with their transparent electrode surfaces facing each other, and a predetermined gap is provided between them. The pair of transparent substrates are joined by a sealing material, and a liquid crystal material is injected into the gap. In the multicolor liquid crystal display element, the multicolor display is provided by providing at least one type of color filter layer having a polarization function on or under one of the transparent electrodes of the pair of transparent substrates. Characteristic multicolor liquid crystal display device. 2. A pair of transparent substrates provided with transparent electrodes are made to face each other with their transparent electrode surfaces facing each other and a predetermined gap is provided between them, and then the pair of transparent substrates are joined by a sealing material, and a liquid crystal material is injected into the gap. In the multicolor liquid crystal display device having the above, a color filter layer made of a polymer resin containing a dichroic dye has a deflection function by an alignment treatment on or under one transparent electrode of the pair of transparent substrates. A multi-color liquid crystal display device characterized by