JPS6225728A - Liquid crystal display element - Google Patents

Abstract

PURPOSE:To display a complicated display easily by providing a common elec trode that covers the whole face of display and a three-layer segment electrode arranged through insulating films. CONSTITUTION:A common electrode 3 that covers the whole face of display and a segment electrode consisting of three layers are provided, and the three- layer segment electrode is arranged in order of the third segment electrode (display pattern electrode) 8, the second segment electrode (mask electrode) 6, the first electrode (leader section) 4 from the electrode 3 side. The order of priority of masking action of each electrode is in order of the third, second, first segment electrodes, and by this order of priority of masking action, the electrode 4 is entirely irrelevant to display whatever installation of a lead wire is made. Accordingly, the lead wire 4 is freely distributed, and more complicated display is made possible. Further, the alteration of display is also made easy.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is applicable to information equipment such as computers, transportation equipment such as automobiles, and household goods such as watches and TV stations, all of which require display. The present invention relates to a liquid crystal display element, and particularly relates to a method of configuring the liquid crystal display element.

[Conventional technology]

The configuration of a conventional liquid crystal display of this type is shown as an example in FIG. 6, in which two glass substrates 1 are arranged in parallel.
, 2, a common electrode 14 and a segment electrode 15 were arranged as transparent electrodes on the inner surface of the glass substrates 1 and 2, and a liquid crystal 12 was injected into the space between the two glass substrates 1 and 20, and the surrounding area was sealed with a sealant 13. It is something. At this time, the common electrode 1
4 and the segment electrode 15 are shown in FIGS. 7 and 8, and the common electrode 14 shown in FIG. This prevents the leader line portion 15a from being displayed. The above explanation has been made using the simplest display example to show the operating principle, but in the case of a more complicated display, the common electrode 14 will also have a more complicated shape.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional liquid crystal display element, as mentioned above, the common electrode must be disposed so that it does not cover the segment electrode except for the displayed figure. The shapes of the common electrodes and segment electrodes become complicated and difficult to arrange, which naturally limits the content that can be displayed, creating a major problem in that there is a limit to the performance of the display element. For example, even if it is necessary to make a small change to the display contents of a liquid crystal display element that has been completely arranged, it may be necessary to redesign the entire arrangement of both common electrodes and segment electrodes, so changes may be required. It is not easy and requires time, which causes problems in compatibility, and in the assembly process, it is extremely difficult to correctly arrange common electrodes and segment electrodes with complex shapes, resulting in process problems. Problems also arose.

[Means for solving problems]

The present invention provides a liquid crystal display element consisting of a common electrode and segment electrodes as a specific means for solving the above-mentioned problems. The three layers of segment electrodes, from the side closer to the common electrode, have a third segment (forming the display and two turns) as a pole,
A second segment electrode that covers the entire display surface, a display/main turn of the third segment electrode, and a first segment electrode that forms a leader line portion for selectively supplying power to the second segment electrode. By providing a liquid crystal display element, it is possible to more easily perform more complex displays than those using conventional technology, and the above-mentioned problems can be solved by making it possible to easily make small changes to the display. This is what I did.

〔Example〕

Next, the present invention will be explained in detail based on an illustrated embodiment. In order to facilitate understanding, the same parts as in the conventional example will be described with the same reference numerals.

In FIG. 1, reference numerals 1 and 2 indicate glass substrates, which are arranged in parallel as in the conventional example.
A common electrode 3 is disposed on the inner surface of the display panel as a transparent electrode so as to cover the entire display surface. On the inner surface of the glass substrate 2, as shown by reference numeral 4 in the figure, a first segment electrode forming a leader line portion at the bottom layer is provided with a transparent electrode, and covered with a transparent electrode, for example, silicon oxide, oxide A transparent insulating film 5 made of magnesium or the like is provided. A second segment electrode 6 is disposed on the upper surface of the insulating film 5 so as to cover the entire display surface with a transparent electrode.
The entire surface is covered with an insulating film 7 similar to the above, and a third segment electrode 8 forming a display diagonal is formed on the upper surface of the insulating film 7. At the same time, in the process of forming these segment electrodes and insulating films, connecting portions 9, 10, and 11 for electrically connecting the segment electrodes are also formed.

2 shows the arrangement of the common electrode 3, FIG. 3 shows the first segment electrode 4, FIG. 4 shows the second segment electrode 6, and FIG. 5 shows the third segment electrode 8. The state of each arrangement and the state of connection between the respective segment electrodes through the connecting portions 9, 10 and 11 are shown. The subsequent steps of injecting the liquid crystal 12 and sealing with the sealant 13 are completely the same as in the conventional example, so the explanation will be omitted.

[For production]

The liquid crystal display elements configured as described above are TN (twisted nematic) liquid crystal, GI ((f-host) liquid crystal, DS
(Dynamic scattering) This can be applied to liquid crystals, etc., but the most commonly used one here is a polarizing plate (not shown).
The operation will be explained using an example of a TN liquid crystal in which the liquid crystals are orthogonal to each other and the liquid crystal is also 900 oriented.

First, when potentials of the same phase are applied to the common electrode 3 and the second segment electrical contact 6, the liquid crystal 12 does not respond and the display surface is transparent. At this time, when a potential of the opposite phase to the common electrode 3 is applied to the segment desired to be displayed on the third segment electrode 8, which is the display/mother turn, only the portion of the liquid crystal 12 sandwiched between the two electrodes responds. The portion becomes opaque and can be displayed in approximately black. At this time, the first segment electrode 4 for supplying potential to the third segment electrode 8 is also of course in opposite phase to the common electrode 3, but it is arranged at a position closer to the common electrode 3 than the first segment electrode 4. No response of the liquid crystal occurs because it is masked by the provided second segment electrode. The priority of this masking action is the third segment electrode 8, the second segment electrode 6, and the first segment electrode 4, and depending on the priority of this masking action, the first segment electrode can arrange any lead wire. However, it can be completely unrelated to display.

To explain yet another example of operation, first, potentials of opposite phases are applied to the common electrode 3 and the second segment electrode 6. In this case, all the liquid crystals 12 respond, and the display surface becomes completely dark. At this time, by applying a potential in phase with the common electrode 3 to the third segment electrode 8, only the display becomes transparent.

To summarize the above, the liquid crystal display element according to the present invention can display black characters on a white background or white characters on a black background as desired by simply switching the potential applied to the common electrode 3.

〔Effect of the invention〕

As explained in detail above, a common electrode that covers the entire display surface and a segment electrode consisting of three layers are provided, and the segment electrodes of the three layers are connected from the common electrode side to the display/main turn electrode, the mask electrode, and the head of the leader line. By arranging the lead wires in a mask effect, the leader lines can be arranged freely, making it possible to display more complex displays, which has the advantage of increasing the practicality of the liquid crystal display element, and also makes it easy to make changes. This improves compatibility, and since the common electrode covers the entire surface, it eliminates the need for the process of aligning two glass substrates, increasing productivity, which was previously impossible. This also provides effects such as the ability to easily perform negative/positive inversion display.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing a liquid crystal display element according to the present invention, and FIG.
The figure is an explanatory diagram showing the common electrode, Fig. 3 is an explanatory diagram showing the first segment electrode, Fig. 4 is an explanatory diagram showing the second segment electrode, Fig. 5 is an explanatory diagram showing the third segment electrode, FIG. 6 is a sectional view showing a conventional example, FIG. 7 is an explanatory diagram showing a common electrode of the conventional example, and FIG. 8 is a three-layer diagram showing a segment electrode of the same conventional example. 1.2... Glass substrate 3... Common electrode 4.6.8... Segment electrode 5.7.
...Insulating film 9, 10, 11...
Connection part 12...Liquid crystal 13...
...Sealant patent applicant Stanley Electric Co., Ltd. Figure 7 Figure 8t! 1 11:1

Claims (1)

[Claims] A liquid crystal display element consisting of a common electrode and a segment electrode consists of a common electrode that covers the entire display surface, and three layers of segment electrodes each disposed with an insulating film in between. From the side near the electrode,
A third segment electrode that forms a display pattern, a second segment electrode that covers the entire display surface, and a third segment electrode that forms a leader line portion that selectively supplies power to the display pattern of the third segment electrode and the second segment electrode. A liquid crystal display element characterized by having a one-segment electrode.