JPS6291917A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To make the color of the foundation approximately uniform to make display patterns easy to see, by arranging a color filter of plural colors on all of the surface of an electrode substrate on which pattern display electrodes are formed. CONSTITUTION:A color filter 5 where blue, green, and red stripe filters 5b, 5g, and 5r are formed in order repeatedly in the longitudinal direction is arranged on all of the surface of an upper substrate 1 on which segment electrodes 3 are formed. That is, the color filter 5 is formed on not only segment electrodes 3 but also a glass plate, where segment electrodes 3 do not exist, on the inside surface of the upper substrate 1. By this constitution, the display pattern of number '3' is made easy to see because non-lit segment part B and a non- segment part C of segment electrodes 3 on the display face have the same color and it is difficult to distinguish them from each other.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of Shimeito] The present invention relates to a liquid crystal display device having a built-in color filter inside a liquid crystal display element.

[Background of the invention]

Conventionally, in a liquid crystal display device equipped with a color filter, color filters are disposed on the front and rear surfaces of a liquid crystal display element, as disclosed in, for example, U8F, Publication No. 3840695.
A method has been proposed in which a color display pattern of only one color is obtained at each location.

However, in such liquid crystal display devices, no technology has been recognized for displaying the same pattern in various different colors.

FIG. 2 is a cross-sectional configuration diagram of a main part showing an example of a color liquid crystal display device (unpublished) that displays the same pattern in a plurality of different colors. In the same figure, segment electrodes 3 and common electrodes 4 made of transparent conductive films are formed on the opposing surfaces of upper and lower substrates 1.2 made of transparent glass plates, respectively, and on these segment electrodes 3. A color filter 5 in which stripe filters 5b, 59, and 5r of three colors of blue, green, and red are repeatedly formed in order is arranged, and a predetermined space between these upper and lower substrates 1 and 2 is arranged. A spacer-containing sealing material 6 is used to seal the periphery of the envelope at a distance to form an envelope.
(Twi5ted Nematic) A liquid crystal display element 8 is constructed by enclosing a liquid crystal 7. Further, on the outer surface of this liquid crystal display element 8, that is, on the outer surface of the upper and lower substrates 1.degree.2, upper and lower polarizing plates 9,
10 are arranged to constitute a color display liquid crystal display device.

In the color display liquid crystal display device configured in this way, for example, in the case of blue display, by applying a predetermined voltage between the segment electrode on which the blue stripe filter 5b is superimposed and the common Tm pole, By changing the optical properties of the upper substrate 1, that is, by transmitting the light incident on the liquid crystal portion corresponding to the blue stripe filter 5b.
FAn can be displayed as a blue display pattern from the side.

Furthermore, a green display pattern and a red display pattern can be displayed in the same manner. Furthermore, white display can be achieved by simultaneously applying a predetermined voltage between the segment electrodes and common electrodes corresponding to the blue stripe filter 5b, the green stripe filter 5f, and the red stripe filter 5r. In this way, many colors can be displayed by combining each color.

FIG. 3 is a plan view of essential parts of the color liquid crystal display device shown in FIG. 2, and the same reference numerals in FIG. 3 indicate the same parts. In the same figure, the segment electrodes 3 are formed in a shape of approximately 80 characters.
, sr are sequentially and repeatedly formed in the vertical direction.

However, the liquid crystal display device configured in this way is
As shown in FIG.
3" is displayed in a pattern in color and the display pattern is viewed from the front side.
When distinguishing between non-lighting segment part B and non-segment part C, non-lighting segment B and non-segment part C
There was a problem that the difference in color tone between the two images was quite sharp and the display pattern became difficult to see.

[Purpose of the invention]

An object of the present invention is to provide a liquid crystal display device that can reduce the difference in color tone between non-lit segment portions and non-segment portions and improve the display quality of display patterns.

[Summary of the invention]

In the liquid crystal display device according to the present invention, color filters of a plurality of colors are disposed on at least one of the electrode substrates on which display electrodes are formed, and the entire surface including the electrodes is provided with color filters of a plurality of colors.

[Embodiments of the invention]

Next, embodiments of the present invention will be described in detail using the drawings.

FIG. 1 is a diagram showing an embodiment of a liquid crystal display device according to the present invention, in which FIG. 12(a) is a cross-sectional view and FIG. 1(b) is a plan view thereof. The same reference numerals are given. In the figure, the surface of the upper substrate 1 on which the segment electrodes 3 are formed has 14? , green, and red stripe filter 5
bt5? , 5r are sequentially repeated in the vertical direction, and a color filter 5 is arranged. That is, color filters 5 similar to those on the segment electrodes 3 are also formed on the glass plate on the inner surface of the upper substrate 1 where the segment electrodes 3 are not present.

According to such a configuration, as explained in FIG. 5, the non-lit segment portion B of the segment electrode 3 on the display surface
The color of the non-segment portion C and the non-segment portion C are almost the same, making it difficult to distinguish between them, so that the display pattern of the number "3" can be easily seen.

〔Effect of the invention〕

As explained above, according to the present invention, color filters of a plurality of colors are disposed on the entire surface including the electrode on at least one of the electrode substrates on which pattern display electrodes are formed, so that the underlying colors become almost the same color, and the display pattern Since it becomes easier to see, the display quality can be improved.

[BRIEF DESCRIPTION OF THE DRAWINGS] 16(a) and 16(b) are diagrams for explaining an embodiment of the liquid crystal display device according to the present invention, and FIGS. 2 to 5 are diagrams showing recently proposed (unpublished) FIG. 2 is a diagram for explaining a color display liquid crystal display device. 1...Top board, 2...Bottom board, 3...Segment electric in, 4-# Common 1 pin pole, 5...Color filter, 5b...Fist/blue stripe filter,
510Φ...green stripe filter, 5r-fist...red stripe filter, 6.@-Φ sealing material, 7...
@TN liquid crystal, 811...Liquid crystal display element, 9...Upper polarizing plate, 10...-Lower polarizing plate. Agent 7P Physician Ogawa Muscle ゛・,'' Figure 1 (a) Figure 1 (b) Figure 2 Figure 4 Dan'f13 Figure 5

Claims (1)

[Claims] Translucent upper and lower substrates arranged opposite to each other, segment electrodes and common electrodes formed respectively on the opposing surfaces of both substrates, and at least one of the electrode substrates on which the electrodes are formed are formed on the entire surface including the electrodes. Multi-color color filter,
A liquid crystal display device comprising at least a liquid crystal sealed between the electrode substrates.