JPS6242129A - Electrochromic display element - Google Patents

Abstract

PURPOSE:To enable the ECD having a large capacity by providing a through hole on an isolating substrate in the ECD composed of a p(n) type EC layer an electrolyte layer a n(p) type EC layer, thereby effecting a ECD display and by operating the titled element in a parallel connected type with connecting many of the modules. CONSTITUTION:A transparent common electrode 12, the EC layer 13 of Ir(OH)n, the electrolyte layer 14, the EC layer 15 of WO3 and the counter display electrode 16 are provided on a glass substrate 11. As a leader line is not provided in the titled element, it is not necessary to form the electrolyte layer 14 to a long and a broad shape. The through hole 19 is provided on the isolating substrate 18 at a position capable of contacting with the display electrode 16, and the electric conductive body 20 is disposed to the through hole 19. One end of the prescribed body 20 is connected with the display electrode 16, while, the opposite side of said body 20 is connected with the driving circuit positioned on an up ward of the insulating plate 18. Thus, as the electric conductive body 20 is used instead of an usual leader line, the area necessary to providing said leader line makes unnecessary. The ECD composed of the module construction and having the large capacity and the large area is obtd.

Description

[Detailed Description of the Invention] [Summary] In an ECD consisting of a p (n) type ECC layer, a heavy electrolyte layer, and an n (p) type EC layer, a through hole is provided in another substrate,
It performs ECD 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).
chromic display (ECD) device, and more specifically, to reduce display defects,
The present invention relates to a device that enables a large-capacity ECD by simplifying the lead wires of the display counter electrode, modularizing the unit, and stitching the modules together in a plane.

[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 of Ir(OfOn), 14 is TaJ5 electrolyte layer which is a good ion conductor but does not conduct electrons, 15 is Ir(OH)-03 EC layer which generates electrochromism phenomenon together with n film, 16 is electric current to ECM. 16a is a lead wire connected to a drive circuit (not shown), 17 is a spacer, and I8 is an insulating substrate (protective glass plate).The εCD device requires zero maintenance power for display. It has the advantage of operating at a low voltage and current of about 1 to 3 cm, capable of large-sized display, and displaying beautiful colors.

FIG. 4 is a plan view showing the electrode arrangement of the device of FIG. 3;
FIG. 3 is a sectional view taken along line 11-11 in FIG. 4.

The glass substrate, insulating film, protective 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. This also causes the circuit mounting area to become very wide.
When attempting to realize a large-capacity, large-area ECD by combining a plurality of units, there is a problem that the ineffective area (waste area) becomes large, which is impractical. Furthermore, there is also the problem that the lead wire from the display counter electrode is too long (and may break in the middle).

The present invention was created in view of these points, and the display electrode lead wires are formed on a separate substrate (separate protective substrate),
After forming the ECD element layer and display electrode layer, they are connected to conductive wires formed on a separate substrate through through holes, making it possible to form a circuit on the back side of the display surface, reducing display defects and simplifying the circuit configuration. The present invention aims to provide a large-capacity, large-area εCD device with a modular configuration.

[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 EC113, n, (p) type E shown in Figure 1
In an εCD device consisting of a C layer 16 and an electrolytic IW material layer 14 of a good ionic conductor between these EC layers, one electrode 12 is formed, and a p(n) type EC layer 13/electrolyte 1if14/n( A p) type EC layer 16 is provided, a through hole 19 is provided on another insulating substrate, one side of the through hole is connected to the EC layer 16, and a conductor 20 is used to connect the other side of the through hole (not shown). ) is coupled with the drive circuit, and the above εCD is made into one module,
A device is also provided that interconnects these modules and electrically drives and displays each module in parallel.

[Effect]

The above-mentioned εCD device uses a ceramic substrate as another substrate, and connects the drive circuit wiring and display electrodes using through holes, and does not use the conventional long lead wires, which reduces display defects and improves the circuit configuration. Simplification is realized, and furthermore, a large-capacity, large-area HCD 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) and Ir(OH) are placed on a glass substrate 11.
n EC layer 3, electrolyte layer 14, number 03 ECCrB2
The structure and manufacturing method of the display counter electrode 16 are the same as in the conventional case, but since the lead wire 16a is not provided, the electrolyte layer 14 does not need to be formed as long and wide as in the conventional case. 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 come into contact with the display electrode 16, a conductor 20 is placed in the through hole 19, and one end of the conductor 20 is provided. is connected to the display electrode 16, and the opposite side is connected to a drive circuit (not shown) (for example, an IC) located above the insulating substrate I8 in FIG. By doing this, the conductor 20 can be replaced with the conventional lead wire 1.
This is an alternative to 6a.

FIG. 2 is a plan view showing the arrangement of the display electrodes shown in FIG. 1. Comparing this with the conventional example shown in FIG. 4, it will be understood that the area for the lead wire 16a is no longer required.

The above configuration not only separates the p-type EC layer and n-type EC layer, but also expands the electrolyte layer, which also serves as an insulating film between the eyebrows between both electrodes (located above and below the conventional lead wire 16a). This eliminates the need for short circuits and leaks between both electrodes, and also enables smaller devices and more compact wiring, improving reliability.

Conventionally, a transparent glass substrate was usually used as the insulating substrate, but this was replaced with a ceramic substrate that allows easy formation of through holes. By applying various colors to the ceramic substrate, the background color of the EC layer can be changed, and two-color EC
D device can be obtained, which has the advantage of widening the range of application of the ECD device.

The configuration shown in FIG. 1 is taken as one module, and these modules are interconnected, so that each module can be electrically driven and displayed in parallel. The ECD layer value currently takes about 100 looms to color, but if these modules are electrically driven in series, it takes 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 ECD device. This makes it possible to color the area in a slightly longer time than 100 m5.

In the above example, we explained that it is applicable to segment type elements, 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 becomes possible to configure small ECD modules in a dot matrix type, and when these are connected, the ineffective area between modules becomes small, which makes it possible to manufacture a large-area ECD device. Furthermore, in the above example, the p-type EC 16% n-type EC layer is arranged in this order from the common electrode, but the same effect can be obtained by arranging it as the n-type EC layer and then the p-type EC layer. is not limited to ceramic substrates.

〔Effect of the invention〕

As described above, according to the present invention, display defects can be reduced, space for conventional lead-out conductors can be saved, and furthermore, by modularizing the units and connecting them together, it is possible to create a large-capacity, large-area ECD device. It has the effect of creating

[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 electrolyte l-1 15 is the EC layer, 16 is a display counter electrode; 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. East precedent front view with book Figure 1 115Q year old, plan view of Sne manuscript plexus 2 Figure 3 Yoto 4PI Mekanesue Electric Power Station Exit Figure 4

Claims (2)

[Claims] (1) On the common electrode (12) on the glass substrate (11), an electrochromic layer (13) of one conductivity type, an electrolyte layer (14) and an electrochromic layer (
15) in order, an insulating substrate (18) is placed next to the display counter electrode (16), and a conductor (20) passing through the through hole (19) of the insulating substrate (18) connects the display counter electrode (16). An electrochromic display device characterized by having a configuration in which it is connected to a drive circuit. (2) The common electrode (12) on the glass substrate (11) described above
), electrochromic layer (13, 15), electrolyte layer (14), display counter electrode (16), insulating substrate (18),
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.