JPS5983190A - Electrooptic unit - 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: In the electro-optical device according to the present invention, in which a liquid crystal material is sandwiched between two substrates, two KM elements are installed in one pixel on one of the substrates, and two KM elements are installed in each pixel of the same data line. The present invention relates to an electro-optical device in which two installed M elements are independently wired using two wires.

The board on which the conventional MIM element is installed is shown in Figure 1.
Two wires, namely a first wire 4 and a second wire 5, are installed on both sides of the pixel electrode 7 of the same data line, and the two M1M elements installed on the pixel electrode 7Vc are connected to the first wire 4 and the second wire 5, respectively. The second wiring 5 connects the V line independently, and the first
The wiring 4 and the second wiring 5 were provided with independent terminals, that is, the first terminal 2 and the second terminal 3, which were placed next to each other.

FIG. 2 is an enlarged view of one pixel in FIG. 1, and FIG. 3 is a cross-sectional view taken along line α. 1 is the substrate, 8 is the first metal of the MIM element, 9 is the insulator of the MIM element, 6FiM1M
The second metal 7 of the element is a pixel electrode. Also, Figure 4 t
i This is an equivalent circuit of an arbitrary pixel when an electro-optical device is assembled using the substrate shown in Fig. 1, where 10 is the resistance of the liquid crystal layer, 11 is the capacitance of the liquid crystal layer, and 12 is the first wiring 4. 15 is the resistance of the wired M element and its capacitance, and 15 is the resistance of the MIM element separated by the 14 second wires 5, and 15 is its capacitance. It is difficult to manufacture all MIM elements without defects.

It has been impossible to manufacture defect-free electro-optical devices because lighting defects and non-lighting defects occur all the time. However, although it is possible to eliminate the non-lighting defect by installing two MIM elements in one pixel, it is necessary to correct the dot defect. The person making the correction must inspect which M element of each pixel is defective, which requires a great deal of time and expense. In addition, since the first terminal 2 and the second terminal 5Fi are installed next to each other and it is difficult to mount them independently, the first terminal 2
and the second terminal 3 were short-circuited. Sixthly, it is impossible to inspect the mounting parts, and it is necessary to search for defective MIM elements before mounting. This was corrected by cutting the doctor's office in 25 because the M-engine and M-reject wired by the wiring 5 were short-circuited. Fifth
The figure shows an equivalent circuit of an unmodified pixel, and FIG. 7 shows an equivalent circuit of a corrected pixel, that is, the pixel shown in FIG. 24
is the drive circuit. From Figure 5 and Figure 7, the uncorrected pixels are driven by a 2m M element, and the corrected pixels are driven by 1 M element.
It is driven by an element. , it is difficult to obtain a uniform display because the driving conditions of the corrected pixel and the uncorrected pixel change.

Furthermore, if the M element is destroyed by static electricity during panel mounting and a lighting defect occurs, it will be impossible to correct it and the problem will occur.

The present invention eliminates such drawbacks, and its purpose is to provide an electro-optical device that is defect-free without modification.

The present invention will be described in detail below based on examples.

Embodiment 1 FIG. 8 shows two electrodes on both sides of the pixel electrode 21 of the same data line.
Main wiring, that is, the first wiring 19 and the second wiring 2
0 and installed each pixel electric fi21Vc.
MIM elements are connected to the first wiring 19 and the second wiring 2G.
The first wiring 19 and the second wiring 20 have independent terminals, that is, a first terminal 17 and a second terminal 18, arranged on both sides of the same data line.

This is the second metal of the 16Jd substrate and 22M element.

The structure of the pixel electrode and the MIM element is exactly the same as that of the conventional one. An electro-optical device is assembled using the substrate shown in FIG. 8, and the first terminal 17 and the second terminal 18 are mounted. FIG. 9 is an equivalent circuit. A drive signal is applied to the first terminal 17 to check whether there is a defect in the M element. Only the defective data line is connected to the second terminal 1 using the switch 23.
A drive signal is applied to 8. First arrangement #li of the same data line! It is possible to manufacture a defect-free 1i optical device by selecting terminals with almost no defects in both the wiring 19 and the second wiring 20 at the same time. In addition, since it is possible to search for defects after mounting, there is no need to inspect which MIM element of each pixel is defective before assembling the electro-optical device, and the cost can be reduced. Furthermore, since the conventional uncorrected pixel was driven by two MIM elements, and the corrected pixel was driven by one r'IM element, a contrast difference occurred between the corrected pixel and the uncorrected pixel. According to this embodiment, it is possible to drive with only one MIM element, so that contrast unevenness in pixels can be completely eliminated.

Embodiment 2 An equivalent circuit when an electro-optical device is assembled using the substrate shown in FIG. 8 and installed in a dormitory with the second terminal 18 is shown in FIG. 10.

A drive signal is applied to the second terminal 18 to check for defective data lines. The defective cheater line is unmounted, and the first terminal 17 is mounted only on the defective data line. FIG. 11 shows the Misaki circuit when the first terminal is mounted.

That is, by selecting which of the first terminal 17 and the second terminal 18 to mount, it is possible to ensure no defects. Further, the Vc comparison switch 23 of the first embodiment is not required, and the cost can be further reduced.

As described above, the present invention can assemble and mount an electro-optical device, and make it defect-free without having to touch the edge of the illuminated IW optical device directly.

[Brief explanation of drawings]

Figure 1 shows a board on which a conventional MIM element is installed;
The figure is a one-pixel mineral diagram in Figure 1, and Figure 3 is the M (Z) diagram in Figure 2.
Figure 4 is the equivalent circuit before electro-optical i-mounting, Figure 5 is the equivalent circuit after mounting, Figure 6 is the shape of the defect correction pixel, and Figure 7 is the implementation of the defect correction pixel. This is the later equivalent circuit. Figure 8 shows a board on which the M element is installed based on the present invention, and Figure 9 shows an equivalent circuit when two terminals are mounted at the same time.
10.2 and 11 are equivalent circuits when one of the two terminals is selected and mounted. 1.16...Board 2.17...First terminal 3.18...Second terminal 4.19...First wiring 5 .20... Second wiring 6.22... Second metal of MIM element 7.21
... Pixel electrode 8 ... First metal 9 of M element
Insulator 10 of the MIM element...Resistance 11 of the liquid crystal layer...Capacitance 12 of the liquid crystal layer...Resistance of the M element wired by the first wire 13... MI wired by the first V line
Capacity of M element 14...Resistance of M element connected by the second wiring 15...Capacity of M element wired by the second wiring 23...Sui Nochi 24...JlKl rotation 25...Defect correction points and above Applicant Suwa Seikosha Co., Ltd. 58 Figure 1 Figure 2 Figure 3 Figure 4 Figure 1) Figure 5 Figure 6 Figure 7 Figure 8

Claims (3)

[Claims] (1) At least one of the two substrates of an electro-optical device has a liquid crystal material sandwiched between two substrates. In an electro-optical device, two M elements (referred to as M elements) are installed in one pixel, and 2#i M elements installed in pixels of the same data line are independently wired with two wires.
An electro-optical device characterized in that terminals of the two wires are installed on both sides of the same data line. (2) Mount the terminals of the two wirings respectively, and
An electro-optical device according to claim 1, in which one of the main wirings to be driven is selected by a switch. (3) The electro-optical device according to claim 1, wherein only one of the terminals of the two wirings is selected and mounted.