JPS63123025A - Formation of electrode for liquid crystal display element - Google Patents

Abstract

PURPOSE:To reduce the cost by forming a terminal part where two display units having a common electrodes and segment electrodes alternately and adjacently are so divided to connect with each other and the electrode of one display unit generated at a terminal part is connected a charging part and an electrode plate for current collection. CONSTITUTION:The segment electrodes 4a and 4b and common electrode 5a are so formed at the center part of a liquid crystal display element 1 separately as to connect two alternately adjacent display units 6. Consequently, an electrode regarding only one display unit is formed at both end parts of the electrodes as both electrodes as shown by the common electrodes 5x and 5y when the number of the display units 6 is even as the segment electrode 4y and common electrode 5x when odd, and those electrodes form a terminal part 7 for connections with the charging part and electrode plate for current collection. Then, when the connection part is a segment electrode at the joining part between adjacent display units 6, there is no common electrode opposite, so the connection is easily made without exerting any influence upon display contents.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a display device for a high-voltage charging section using a liquid crystal display device.

[Prior art] There is a conventional high-voltage charging part display device using this type of liquid crystal display element as shown in Fig. 4, in which the charging part HC, which is a conductor whose charging state is to be displayed, and the ground G are connected to each other. A current collecting electrode plate P having appropriate stray capacitances CS and CO is provided between the current collecting electrode plate P and the charging portion HC, and a liquid crystal display element 1 is provided between the current collecting electrode plate P and the charging portion HC.
1 is connected to display the state of charge. At this time, the voltage E applied to the liquid crystal display element 11 is expressed as E-(Co/C5, where VO is the voltage applied to the charging section HC). )Vo... Although the calculation formula (1) is roughly followed, in reality, the capacitance C8 between the charging part HC and the current collecting electrode plate P is equal to the capacitance C8 of the liquid crystal display element 1.
This is determined by the capacitance between the common electrode of No. 1 and the segment electrode.

Note that the symbol ZD in the figure is a non-linear element such as a Zener diode, which is used to protect the liquid crystal display element 11 from overvoltage.

K Problems to be Solved by the Invention] However, the above-described conventional liquid crystal display element 11 is provided on one glass substrate (not shown) as shown in FIG. Since the segment electrodes 13 for each display unit provided on the other glass substrate facing the integrated common electrode 12 are connected in parallel, it is possible to increase the number of display units, or to When increasing the size of the element 11 itself, the interelectrode capacitance C8 increases, and as is clear from equation (1) above, there is a problem that the voltage E applied to the liquid crystal display element 11 decreases and no display is performed. In order to solve this problem, as shown in FIG. 6, the common electrode 12
A method has been proposed and partially implemented in which the side is divided into display units and each display unit is electrically connected in series to reduce the capacitance. External wiring across the board is required, and the formation of external terminals for this makes the arrangement of both common and segment electrodes complicated and difficult.Furthermore, external wiring work is also required, making the liquid crystal display element expensive. In other words, the manufacturing process itself becomes difficult.

Means for Solving Problem 1 The present invention provides a concrete means for solving the above-mentioned conventional problems, in which a pair of terminal parts are connected to a live part and a current collecting electrode plate. In a liquid crystal display element for a high-voltage charging display in which the electrodes are each divided, the common electrode and the segment electrode are formed by being divided so that two adjacent display units are connected to each other, and the end portion By providing a method for forming electrodes for a liquid crystal display element, in which the electrodes of one display unit produced in the above are used as terminal parts connected to the charging part and the current collecting electrode plate, an appropriate inter-electrode capacitance can be achieved. The present invention is intended to solve the above-described conventional problems by making it possible to obtain a liquid crystal display element with a simple manufacturing process.

K Embodiment Next, the present invention will be described in detail based on an embodiment shown in the drawings.

1 and 2 is a liquid crystal display element for a high-voltage charging display according to the present invention, and this liquid crystal display element 1 has two glass substrates 2 facing each other in the same way as a normal liquid crystal display element. Although the common electrode and the segment electrode are arranged on the inner surface side of the liquid crystal display element 1, according to the present invention, the segment electrodes 4a and 4 are arranged in the central part of the liquid crystal display element 1 in FIG.
b and a common electrode 5a, and as shown in FIG. 2 by a segment electrode 4a and a common electrode 5a, common electrodes and segment electrodes are formed by dividing them so as to connect two adjacent display units 6 alternately. It is. In this case, if the number of display units 6 at both ends of the electrodes is an even number as shown in FIG.
For example, if it is on the common electrode side, the symbol 5x in the figure,
If the number of display units is an odd number as shown in FIG. This electrode 5X, 5y or electrode 5x, 4
．． y indicates the terminal portion 7 for connecting the charging portion HC of this liquid crystal display element 1 to the current collecting electrode plate P explained in the above-mentioned conventional example.
Since this wiring is completely the same as the conventional example, explanation and illustration here will be omitted.
As explained above, in the joint portions of adjacent display units 6, for example, when the connecting portions are segment electrodes, there is no common electrode at the opposing position.
Connections can be easily made without affecting the displayed content.

It goes without saying that the display unit 6 is not limited to the display content, such as each character, for example, as long as it has a size that allows an appropriate interelectrode capacitance to be obtained, and as shown in FIG. When it is preferable that the terminal portion 7 is on one glass substrate, for example, on the glass substrate 3 side, the glass substrate 3
It is possible to freely make changes such as providing a terminal portion 7 at the end and connecting it to the segment electrode 4y at the end using conductive paint 9 via the sealing material 10.

In addition, what is indicated by the reference numeral 8 in the figure is the glass substrate 2.3.
A polarizing plate is attached to the outer surface of each of the two.

K action] By forming the segment electrodes and common electrodes in this way, the electrical equivalent circuit of the liquid crystal display element 1 of the present invention becomes as shown in FIG. 3, and the area of the display unit 6 can be adjusted as appropriate. By doing so, the capacitance between the electrodes can be adjusted freely, and at this time, it is not necessary to perform external wiring.

Effect blade of K invention As explained above, according to the present invention, the method for forming electrodes of a liquid crystal for high-voltage charging display is such that common electrodes and segment electrodes are formed by dividing them so that two adjacent display units are connected alternately. In addition, by making the electrode of one display unit that occurs at the end part a terminal part connected to the charging part and the current collecting electrode plate, flexible interelectrode capacitance can be achieved without the need for complicated internal wiring or external wiring. This makes it possible to freely set the interelectrode capacitance without wire connection, which is effective in reducing costs.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views showing one embodiment of the method for forming electrodes of a liquid crystal display element according to the present invention for even and odd display units; FIG. 3 is a wiring diagram showing the equivalent circuit of FIG. 1; FIG. 4 is a connection diagram showing a conventional example, FIG. 5 is a wiring diagram showing an equivalent circuit of the conventional example, and FIG. 6 is a wiring diagram showing an equivalent circuit of another conventional example. 1...Liquid crystal display element 2.3...Glass substrate 4a, 4. b, 4y...Segment electrode 5a5
×, 5y... Common electrode 6... Display unit 7... Terminal section 8... Polarizing plate 9... Conductive paint 10... ...
・Seal material

Claims (1)

[Claims] In a liquid crystal display element for a high-voltage charging display, in which a pair of terminal parts are connected to a charging part and a current collecting electrode plate, and a common electrode and a segment electrode are respectively divided, the common electrode and the segment electrode are arranged in two adjacent electrodes. The display unit is formed by being divided so that the display units are connected to each other, and the electrode of one display unit formed at the end is a terminal part connected to the charging part and the current collecting electrode plate. A method for forming electrodes for liquid crystal display elements.