JPS5931995A - Display - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device using a liquid crystal, and particularly to a display device using a negative type twisted nematic type (TN type) liquid crystal.

Does a liquid crystal display device produce light for display, such as a light emitting diode or a fluorescent display tube? Unlike the so-called fi-active type display device that is emitted by the person himself, the so-called passive type display device performs display by changing the reflection state of light from the outside or by changing the transmission state. It is. In particular, there is a negative type that shows its appearance by controlling the transmission state of light. This negative type liquid crystal display is constructed using a liquid crystal cell in which a 18m liquid crystal is sealed between a pair of transparent IJ4 substrates on which an alignment film is formed to regulate the alignment direction of the liquid crystal. In this case, segments made of transparent electrodes are formed on the transparent substrate, and by applying a driving voltage to these segments, parts that transmit light and parts that do not transmit light are selectively formed, and thereby, for example, numerical values or scales are displayed. Ru.

By the way, since the liquid crystal display device itself is a so-called passive type display device that does not emit light itself as described in 5 above, the state of the display is not necessarily easy to see. In order to use it as a measuring instrument, it could not be used up to -1: in terms of appearance and precision. However, the liquid crystal display device
Its drive is simple, the shape of the segments can be made relatively freely, and even large ones have various advantages such as being relatively compact and compact.

Therefore, liquid crystal display values with such advantages can be used, for example, in light emitting diodes and fluorescent displays. Using an active type display element such as a f-type display device, it is possible to make the display appear as if it were emitting light from itself, and further enhance the display! If such a design process could be applied easily, it would become extremely useful as an instrument for automobiles, for example.

This invention was made in view of the above-mentioned conventional ``M fc'', and its purpose is to provide V, easy movement, and relatively easy to obtain various display patterns. In addition, while taking full advantage of the advantage of the liquid crystal display device that it is easy to obtain a relatively large one, it is possible to make the display as bright and easy to read as when using a single-signal type display element 7. What's more, a display device that makes the display even easier to see and allows easy design processing. It is about providing.

The purpose of the above? To achieve this, this invention first requires a twisted nematic liquid crystal? Orientation direction of the liquid crystal 7?
A crystal cell is sealed between a pair of transparent substrates on which an alignment film is formed, a polarizing plate, and a masking plate on which a constant display pattern is formed. A display device is constructed by overlapping the surface light source.

At this time, the liquid crystal cell is electrically [,1ffX dynamic 1u
1] A display area that is controlled and a basis weight area that is not subjected to electrical drive control 7 are formed. Further, the alignment film is selectively formed only on a portion of the transparent substrate that corresponds to the display portion, so that the background portion is formed transparent. On the other hand, in the mask plate, the optical fixed display pattern is formed to overlap with the background part, and a transparent window part is formed in a position corresponding to the display part. This is special 1' change and ``a)''.

The above is a description of a preferred embodiment of this invention based on the drawings. The static crystal display device +iZ shown in FIG. The liquid crystal cell 1 is shown in FIG. 2A.

As shown in FIG. B, two transparent substrates 10. 10
In between, 1.13 pieces of liquid crystal were sealed. Both transparent substrates &10.10 are overlaid with polarizing plates 9, 9, respectively. An alignment film is formed on the transparent substrates 10.10, and the alignment direction of the liquid crystal molecules is regulated by the alignment film, and the liquid crystal molecules are formed on the two transparent substrates 10.10, as shown in FIG. The direction of vibration of the light is also twisted along the twist direction of the liquid crystal molecules.In this state, the light 1
4 between two polarizing plates 9 and 90? It cannot pass through and becomes opaque. Here, as shown in Figure 2B,
When a driving voltage is applied to the transparent segment positive electrodes formed in advance on the two transparent substrates to, to, the liquid crystal molecules between them align in the direction of pressure application, that is, in the direction of the electric field. Therefore, the light 14 has two polarized lights 4
You should be able to make one friend in 90 minutes. In other words, 1
Only the portion of the segment to which the 1 perturbation voltage was applied becomes transparent. In this way, by selecting the segment to which the driving voltage should be applied, it is possible to display several squares or one scale. I
Vc is driven mechanically to display numerical values and scales/) display portions 7a, 7b and a spine portion 8 (mesh portion in the figure) which is not subject to electrical drive control. It is formed. In the display portions 7; I and 7b, the segments to which the driving voltage is applied are made transparent, thereby representing a display pattern such as characters. After that, the transparent substrate 10. which corresponds to the display portions 7a and 7b is placed.
The above-mentioned alignment film is formed in the portion 10. However, the back 1'=i, 1X other than the display part 7a, 71)
The IS portion (I open portion in the figure) 8 does not have its orientation I)+i. As a result, the night crystal of the 11th part 8 on the back is the circular pattern of the molecule: 1, k1, and 1. [There is, and this means that this -1'+' view aS is 8 months, Kameno member - ``The light is nin'' without being exposed] 1
Added d- “ro.
,Ccuff,knee)
;:1111i11 l [17) inn Hikari iF! ,
Heavy) 11. n-pass-f-rokotoka dezaru. However, the backward part 8 is always JPj, 'JI state・,ζ
11 and ′, (ri°C color.

On the other hand, on the mask plate 2, an optical display pattern 11, i.e., a fixed plate, a frame, etc., is applied with appropriate coloring. It is formed. These fixed display patterns 11 are
(It is formed at the back part 8 of the liquid crystal cell 1 at the position [1). Also, the light display of the liquid crystal cell 1 is 111! minutes 7
The part corresponding to the 7bK position is transparent and the 4th part is 123.1
2b is formed and small. As a result, 1.・Night crystal cell 1°
t6 and mask plate 2 side light (in shape 4 superimposed on t3,
70-sided light el; As a result, the display portions 7a, 71)y of the liquid crystal cell 1 can be seen through the transparent windows 12a, 12b of the mask plate 2, respectively, and fixed display patterns such as letters, fixed scales, etc. 11 becomes visible when it is illuminated from behind by light that passes through the always transparent background portion 8 of the liquid crystal cell 1. In this way, the display portions 7a and 7b of the liquid crystal cell 1 are displayed clearly as if they were using an active type display element 7 such as a light emitting diode or a fluorescent display tube, and furthermore, the display was performed using a mask board. 2
Enhanced by the active display of the 0-fixed indicator pattern 11, an easy-to-read display that is extremely suitable for, for example, an automobile instrument is provided. Furthermore, the design effect of the display can be changed very easily by simply changing the fixed display pattern 11χ of the mask plate 2, without changing the segment pattern of the liquid crystal cell 1. Therefore, for example, in the case of automobile instruments, it is possible to easily use minutely different instruments for each type of work.

Note that in the liquid crystal cell 1, an alignment film is selectively formed.
As a filtration method, the pre-steps of the orientation treatment Vi, j,;
Orientation processing lie J'Masking on non-linear parts';
;, rl+ -f ka, 3y6 ini 'L arrangement'] Processing +1a 'a7 itQ 7T< :lS minute 7a, 7
You can easily do anything by applying it only to the corresponding bV. Although the liquid crystal cell 1 was placed on top of the mask plate 2, the same effect could be obtained by placing the liquid crystal cell 1 on top of the mask plate 2.

As described above, the display device according to the present invention has 1. It is easy to drive, and it is easy to obtain a relatively large display pattern.
While taking advantage of the advantages of EX crystal display devices, the display can be made extremely clear and easy to see, and furthermore, it is easy to apply design treatments to make the display even more appealing. .

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an example of a display device according to the present invention, and FIGS. 2A and 2B are perspective views showing the operating principle 7 of a TN type liquid crystal display cell. 1...Liquid crystal cell 2...Mask plate 3...Surface light source 4...Illuminating QjJ bulb 5...J light guide 6...Semi-transparent plate 7a, 7b...Display portion 8 ...Back 31 part 9...1) Mountain light board 10...1ii'! '4 board 11...hard 5J! Display patterns 12a, 12b
...'Transparent window part 1;3...Liquid crystal material 1・1...
°Advanced, νL] Kiyoshi Umai

Claims (1)

[Claims] Twisted nematic liquid crystal χ between a pair of transparent substrates formed with an orientation 1 that regulates the alignment direction of the liquid crystal] A liquid crystal cell made of a human body, a polarizing plate, and an optical fixed display bar with a watermark. In a display device in which a mask plate with turns formed thereon is overlapped with a surface light (j), the above 741 product cell (.
Well, the display part that is electrically controlled 14tll and the electrical (commotion i! i'J background 7Ql≦
The orientation film is selectively formed only on a portion of the transparent substrate corresponding to the display portion, thereby forming the background portion transparent, while the mask plate A display device in which a fixed display pattern is formed so as to overlap the background part, and a transparent window part is formed in one column corresponding to the display part.