JPH0248821Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a color liquid crystal display device that can display zones in color.

Conventional color liquid crystal display devices consist of a twisted nematic liquid crystal cell with a pair of color polarizing plates on both sides, or a so-called guest-host structure in which a dichroic dye is added to the nematic liquid crystal. Such things are known.

However, although these conventional color liquid crystal display devices are capable of displaying a single color or a plurality of colors, they are not capable of color display in which the color tone is continuously changed. There is also a method (ECB method) in which the color tone of hybrid-aligned liquid crystals is controlled by voltage control, but this method has problems such as unstable color development and impractical use.

The present invention was developed by focusing on these conventional problems. For example, when displaying various physical quantities in zones in the form of a bar graph, the low level side and high level side of the display section are made to have different color tones. It is also an object of the present invention to provide a color liquid crystal display device in which the intermediate level portion can be continuously changed between the two tones.

The present invention will be described in detail below based on embodiments shown in the drawings.

1 and 2, 1 is a twisted nematic type liquid crystal cell, and this liquid crystal display cell 1 has a pair of transparent electrode substrates 2 and 3, and both transparent electrode substrates 2 and 3 are arranged in parallel. In addition to holding the
A sealing member 4 for forming a liquid crystal-filled space between the inner surfaces of both substrates, and a liquid crystal-filled space surrounded by this sealing member 4 and formed between the transparent electrode substrates 2 and 3 filled with the liquid crystal-filled space. It consists of a nematic liquid crystal 5 and a pair of polarizing plates 6 and 7 attached to the outer surfaces of the transparent electrode substrates 2 and 3, respectively. To explain in more detail, one transparent electrode substrate 2
is a glass substrate 21 and a bar graph-shaped common electrode 22 formed on the inner surface of the glass substrate 21.
The other transparent electrode substrate 3 includes a glass substrate 31 and a comb-shaped segment electrode 32 formed on the inner surface of the glass substrate 31. This comb-shaped segment electrode 32 is made up of a group of unit electrodes 321 with a constant tooth width divided into a plurality of groups, and furthermore, the surface of each unit electrode 321 is coated with two colors, for example, blue, for each group. Translucent blue dye layer 3 is shown in spots in the figure so that the occupation ratio of yellow and yellow changes continuously.
3 and a transparent yellow dye layer 34 indicated by diagonal lines in the figure. That is, to explain based on the figure, the leftmost group G ₁ (unit electrode number 5
books) are all blue, and the group G ₂ to the right
(number of unit electrodes: 5), the ratio of blue to yellow is 4:1, and the group to the right of it, group G ₃ (number of unit electrodes: 4), the ratio of blue: yellow is 3:1. The rightmost group G ₇ (number of unit electrodes: 5) is all colored yellow (for convenience, the number of comb teeth (number of unit electrodes) is limited here, but the number It goes without saying that it is desirable to increase the number (number per unit area) as much as possible.) In the figure, 23 is the alignment film of one of the transparent electrode substrates 2, and 35 is the black color provided to improve contrast. This dye layer and the other dye layers 33 and 34 are also used as alignment films of the other transparent electrode substrate 3 described above.

The configuration of this embodiment has been described above, and its operation will be described next. For example, the segment electrodes 32 are selected in groups according to the measured quantity such as the remaining amount of vehicle fuel, engine speed, vehicle speed, etc., and the segment electrodes 32 of all selected groups or the first group and the common electrode are selected. 22, a part of the bar graph display section corresponding to the selected group will be displayed in a color tone unique to the selected group by transmitted light or reflected light. Blue depending on the increase or decrease →
It is possible to display a bar graph whose color tone changes from blue-green to green to yellow-green to yellow.

In the above example, the widths of the unit electrodes constituting the comb-shaped segment electrodes are all constant, and the number of unit electrodes to which the blue dye layer is attached and the number of unit electrodes to which the yellow dye layer is attached are different. However, instead of this, the ratio of the number of unit electrodes to which a blue dye layer is attached and the number of unit electrodes to which a yellow dye layer is attached per group is changed. may be the same number, and the width of the unit electrode for blue may be gradually reduced and the width of the unit electrode for yellow may be gradually increased along the display direction. Further, in the above embodiment, the segment electrode shape is comb-shaped, but is not limited to this, and may be, for example, hexagonal, square, or circular dot-shaped. Further, in the above embodiments, a twisted nematic type liquid crystal cell has been described, but a dynamic scattering type liquid crystal cell is also possible.

As described above, the present invention provides first and second display electrodes 2 forming a zone display section on each of the inner surfaces of a pair of insulating substrates 21 and 31 that are arranged opposite to each other.
two electrode substrates 2 and 3 on which electrodes 2 and 32 are formed, and at least one of which is formed to be transparent;
a sealing member 4 that separates the two electrode substrates 2 and 3 substantially in parallel to form a liquid crystal filling space therebetween;
a liquid crystal 5 sealed in the liquid crystal sealed space, and one of the first and second display electrodes 22 and 32 has an area ratio per unit area along the longitudinal direction of the zone display section. In addition to adding two types of fine pigments 33 and 34 so as to gradually change,
Since at least one of the first and second display electrodes 22 and 32 is a color liquid crystal display device that is subdivided in correspondence with the fine pigments 33 and 34, it can display two colors. There is an effect that an intermediate color between the two colors can be displayed.

[Brief explanation of the drawing]

FIG. 1 is an explanatory sectional view showing an embodiment of a color liquid crystal display device according to the present invention, and FIG. 2 is a perspective view showing its electrode structure. 1...Liquid crystal cell, 2, 3...Transparent electrode substrate, 4
... Seal member, 5 ... Nematic liquid crystal, 6, 7
... Polarizing plate, 21 ... Glass substrate, 22 ... Common electrode, 23 ... Alignment film, 31 ... Glass substrate,
32...Segment electrode, 33...Blue dye layer,
34...Yellow pigment layer, 35...Black pigment layer, 32
1...Unit electrode.

Claims (1)

[Scope of utility model registration request] A pair of insulating substrates 21 and 3 facing each other
First and second display electrodes 22 and 32 forming a zone display section are formed on each inner surface of the display panel 1, and at least one of the display electrodes 22 and 32 is formed to be transparent.
two electrode substrates 2 and 3; and two electrode substrates 2 and 3.
a sealing member 4 that is spaced apart substantially in parallel to form a liquid crystal enclosure space therebetween; and a liquid crystal 5 that is sealed in the liquid crystal enclosure space; On the other hand, two types of fine pigments 33, 3 are applied so that the area ratio per unit area gradually changes along the longitudinal direction of the zone display section.
4, and at least one of the first or second display electrodes 22, 32 is subdivided in correspondence with the fine pigments 33, 34. .