JPS62119528A - Electrochromic display element - Google Patents

Abstract

PURPOSE:To reduce display defect and to make a circuit constitution simpler by connecting wirings for a driving circuit with a display electrode by means of through holes provided on an insulating substrate. CONSTITUTION:One of the electrodes 12 is formed and a p(n) type EC layer 13/electrolyte layer 14/n(p) type EC layer 15 are formed on the electrode 12. A through hole 19 is provided on an insulating substrate 18, and the EC layer 15 and a common electrode 12 are connected with one side of the through hole. Further, another side of the through hole is connected with a driving circuit (not given in the figure) by means of an electroconductive body 20. Moreover, a module is formed constituted of an ECD, and each module is connected with each other to execute driving and display of each module in electrically parallel arrangement. By this constitution, defects in display is decreased and the constitution of the circuit is made simpler.

Description

[Detailed Description of the Invention] [Summary] An ECD consisting of a p(n) type EC layer/electrolyte layer/n(p) type EC layer [in which a through hole is provided in the substrate and a K
It performs CD display, and a large number of the modules are connected and driven in parallel.

[Industrial application field]

The present invention is an electrochromic display (Electro-chromic display).
This technology relates to chromic display (ECD) devices.More specifically, it reduces display defects, simplifies the lead wire of the display counter electrode, converts it into a unit module, and connects the modules planarly to create a large-capacity ECD. The invention relates to a device that makes it possible.

[Conventional technology]

The ECD device shown in the cross-sectional view of FIG. 3 is a known one, and in the figure, 11 is a glass substrate, 12 is a common electrode made of, for example, transparent ITO, and 13 is made by anodizing Ir. EC layer film of I r (OH)n, 14 is a Ta10w electrolyte layer that is a good ion conductor but does not pass through the pentad, 15 is WOs that generates electrochromism phenomenon together with the I r (OH) n film. (7) EC layer ,
+6 is a display counter electrode that supplies Ec+mtct flow, 16
m is a lead wire connected to a drive circuit (not shown); 17
indicates a spacer, and 18 indicates an insulating substrate (protective glass plate).

The ECD device has zero maintenance power for display and 1
It has the advantage of operating at a low voltage of ~3v8 degrees and low current, capable of large-sized display, and beautiful color display. Figure 4 is the third
FIG. 3 is a plan view showing the pole arrangement of the device shown in FIG.
FIG. 3 is a sectional view taken along line III-III in the figure. The glass substrate, insulating film, eel glass plate, etc. are arranged parallel to the paper surface.

[Problem that the invention seeks to solve]

In conventional thin-film ECDs, the display counter electrode is formed on the element forming substrate, so if there is a defect in the insulating film between the display electrode and the counter electrode, unnecessary display defects may occur, resulting in a decrease in yield. In addition, the circuit mounting area becomes larger and wider.
Large-capacity, large-area ECD by gluing multiple units together
When trying to realize this, the invalid area (waste area) becomes large, making it impractical. Furthermore, there is also the problem that the lead wire from the display counter electrode becomes too long and breaks in the middle.

The present invention was created in view of the above-mentioned VC points, and after forming display electrode lead wires on an insulating substrate and forming an ECD element layer and a display electrode layer, the conductor wires and through holes formed on the insulating substrate are formed. By making it possible to form a circuit on the edge of the display surface, it is possible to reduce display defects and simplify the circuit configuration, as well as to provide a large-capacity, large-area ECD device with a modular configuration. purpose.

[Means for solving problems]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a plan view showing the arrangement of display electrodes in the embodiment of FIG.

p (n) type GC layer 13, n (p) type E shown in FIG.
In an ECD@W consisting of a C layer 15 and an electrolyte layer 14 of a good ionic conductor between these EC layers, -10,000 electrodes 1
2, a p(11) WEC layer 13/electrolyte layer 14/n(p) type EC layer 15 is provided thereon, and an insulating substrate 18 is formed.
A through hole 19 is provided on the top, and E is formed on one side of the through hole.
C# 15 and the common electrode 12, and each is connected to a drive circuit (not shown) on the other side of the through hole using a conductor 20. A device is also provided in which each module is connected to an IC and is electrically driven and displayed in parallel.

[Effect]

The above-mentioned ECD device uses a ceramic substrate as an insulating substrate, and connects the drive circuit wiring to the display electrodes using through holes, and does not use the conventional long lead wires, reducing display defects and circuit configuration. Furthermore, a large-capacity, large-area ECD with a modular configuration is provided.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

In the embodiment shown in FIG. 1, a transparent common electrode 12 (made of ITO), Ir(OH) flO
EC layer 13, electrolyte layer] 4. The structure and manufacturing method of the WOS EC layer 15 and display counter electrode 16 are the same as before, but since the lead wire 16a is not provided, the electrolyte N14 is also formed 5rc longer and wider than before. do not have to. Note that the illustrated unit is configured to be viewed from the position indicated by the eye 21.

In the embodiment shown in FIG. 1, a through hole 19 is provided on an insulating substrate 18 (for example, a ceramic substrate) at a position where it can contact the display electrode 16 and the common electrode 12, and a conductor 20 is placed in the through hole 19. One end of 20 is the display electrode 16
The other side is a drive circuit (for example, an IC) (not shown) located below the insulating substrate 18 as seen in FIG.
Connect with. In this way, the conductor 20 is a conventional lead-out conductor IfM16a.

FIG. 2 is a plan view showing the arrangement of one display pole in FIG. 1, and when it is compared with the conventional example shown in FIG. 314, it is understood that the area for the lead wire 16a is no longer required.

With the above structure, it is possible to not only separate the p-type EC layer and n-type EC layer but also to serve as an interlayer insulating film between the marking electrodes. This eliminates the need for short circuits and leaks between the two electrodes, and also makes it possible to miniaturize the device and conduct co/bacterial wiring, improving reliability.

By applying various colors to the ceramic substrate, E
This has the advantage that the background color of the C layer can be changed, a two-color ECD device can be obtained, and the range of application of the ECD device is widened.

The configuration shown in FIG. 1 can be made into one module, these modules can be interconnected, and each module can be electrically driven and displayed in parallel. It currently takes about 100m5 to color the ECD layer value, but if these modules are electrically driven in series, it will take a considerable amount of time to color the entire ECD device, but by parallel driving, it is possible to create a large-capacity, large-area ECU device. This makes it possible to color the area in a slightly longer time than 100 m5.

In the above example, application to segment type elements was explained, but
The scope of application of the present invention is not limited to that case,
Application to dot shapes is also possible.

In addition, it is possible to configure a small ECD module in a dot matrix type, and when these are connected, the ineffective area between module layers becomes small, which makes it possible to manufacture a large-area ECD device. . Furthermore, in the above example, the p-type EC layer and the n-type EC layer are arranged in the order from the common electrode, but the same effect can be obtained even if they are arranged as the n-type EC layer and then the p-type ECr-, and the insulating substrate 18 is not limited to a ceramic substrate.

〔Effect of the invention〕

As described above, according to the present invention, display defects are reduced, the space for conventional lead-out conductors is saved, and furthermore, by modularizing the units and connecting them, This has the effect of creating an area ECD device.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention. Figure 2 is a plan view of the display electrode in Figure 1; Figure 3 is a sectional view of a conventional example; FIG. 4 is a plan view of a conventional display electrode. In Figure 1, 11 is a glass substrate; 12 is a common electrode. 13 is the EC layer. 14 is an electrolyte layer; 15 is the EC layer, 16 is the display facing v/ as the pole, 16a is a lead wire; 17 is a spacer, 18 is an insulating substrate; 19 is a through hole. 20 is a conductor; 21 is the eye.

Claims (2)

[Claims] (1) On the common electrode (12) on the insulating substrate (18), an electrochromic layer (13) of one conductivity type, an electrolyte layer (
14) and an electrochromic layer of opposite conductivity type (1
5) in order, place a glass substrate (11) next to the display counter electrode (16), and connect the display counter electrode (16) with the conductor (20) passing through the through hole (19) of the insulating substrate (18). An electrochromic display device characterized by having a configuration in which a common electrode (12) and a drive circuit are connected. (2) Common electrode (12) on the above-mentioned insulating substrate (18)
, electrochromic layer (13, 15), electrolyte layer (
14), display counter electrolyte (16), glass substrate (11),
2. The device according to claim 1, characterized in that one module is constituted by a conductor (20), the modules are interconnected, and each module is electrically driven in parallel.