JPH05119324A - Liquid crystal display element - Google Patents

Abstract

PURPOSE:To provide a liquid crystal display element which is not affected by static electricity. CONSTITUTION:This liquid crystal display element has a matrix substrate 11 having an active liquid crystal display picture element matrix formed with row lines 18 and column lines 19 and formed with active elements connected to the row lines 18 and the column lines 19 and picture element electrodes 15 connected to these active elements at the points where the row lines 18 and the column lines 19 intersect and a common substrate which has a common electrode and short circuit electrode and faces the matrix substrate 11. The matrix substrate 11 and the common substrate are stuck to each other via a sealing member having a relatively high resistance. The matrix substrate 11 is further formed with short circuit pads 21 coupling the leader lines of the terminal 22 and the row lines 18 and the leader lines of the terminal 22 and the column lines 19 in a main sealing part 26 to be stuck with the sealing members. The parts where the sealing members are stuck are formed to the common electrode or the short electrode with the main sealing part 26 of the matrix substrate 11 and the common substrate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display element, and more particularly, to an active matrix liquid crystal display element which connects a resistor to a row line and a column line to prevent display failure due to static electricity.

[0002]

2. Description of the Related Art First, a liquid crystal display device of this type will be described with reference to FIGS. 1 and 2. Reference numeral 11 denotes a transparent matrix substrate on which a pixel electrode 15 and a thin film transistor (TFT) 16 are provided. A matrix of pixels is formed. One TFT 16 is formed for each pixel electrode 15. 18 is a row line,
The pixel electrodes 15 are formed along each row. Reference numeral 19 is a column line, which is formed along each column of the pixel electrodes 15. Each of the TFTs 16 has its gate connected to a row line and its source connected to a column line. Reference numeral 17 denotes a common electrode formed on the inner surface of the transparent common substrate 12, and the liquid crystal 14 is sealed between the common electrode 17 and the upper surface of the matrix substrate 11 including the pixel electrode 15 and the TFT 16.

Here, a row line 18 and a column line 19
Are selectively driven together, and the TFT 16 in which both the gate and the source are simultaneously driven by them is driven.
Only the pixel electrodes 15 corresponding to this are electrically connected, and a voltage is applied to the corresponding pixel electrodes 15.
Will change the optical state of. A display can be made by the change of the optical state.

[0004]

Since such a liquid crystal display device has a very low operating voltage, and the internal resistance of the liquid crystal between the pixel electrode and the common electrode is very high, it can be driven at a low voltage. It is used in a wide range of technical fields as a low power consumption display element. However, on the other hand, since the liquid crystal display element can be driven at a low voltage, if static electricity enters the inside, it easily falls into an operating state, and this operating state is easy because the internal resistance of the liquid crystal is high. It cannot be resolved, resulting in display failure. In addition, even during the manufacturing process of the liquid crystal display element, static electricity is generated as described above in the thin film transistor (TFT).
It may also cause a defect in 16. Therefore, in the manufacturing process of the pixel matrix, the all-line short circuit method is adopted to try to discharge static electricity, but in this case as well, the discharge effect is lost after the substrate is cut.

The present invention is intended to provide a liquid crystal display element which is not damaged by static electricity even during the manufacturing process of the liquid crystal display element and after the completion of the liquid crystal display element.

[0006]

A row line and a column line are formed, and an active element connected to the row line and the column line and a pixel electrode connected to the active element are formed at the intersection of the row line and the column line. A matrix substrate having a matrix of active liquid crystal display pixels, a common substrate having a common electrode and a short-circuit electrode and facing the matrix substrate, and the matrix substrate and the common substrate have anisotropic conductivity or conductivity. In a liquid crystal display element bonded via a seal member having a relatively high resistance, the seal member is further bonded to the matrix substrate, the main seal portion is provided between the lead lines of the terminals and the row lines, and between the terminals and the column lines. A short-circuit pad that connects the lead lines of It was assumed main seal portion of trix substrate and a common electrode or a short circuit electrode of the common substrate.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The liquid crystal display device of the present invention is a thin film transistor (TFT) which is an active device in which row lines 18 and column lines 19 are formed and which are connected to the intersections of the row lines 18 and the column lines 19. ) 16 and a pixel electrode 15 connected to the TFT 16 is formed on the matrix substrate 11 having an active liquid crystal display pixel matrix. Further, a common substrate 12 having a common electrode 17 and facing the matrix substrate 11 is also provided. The matrix substrate 11 and the common substrate 12 are attached to each other via a seal member 20, and liquid crystal is sealed between them to form a liquid crystal display element. Here, the seal member 20 is anisotropically conductive or has a relatively high resistance imparted with conductivity, and is bonded to the row line 18 and the column line 19 in a state of being electrically connected. This point will be described below.

FIG. 3 is a view showing the matrix substrate 11 as seen from above. 22 is a terminal for drawing out the row line 18, and 23 is a terminal for drawing out the column line 19. 21 is a short-circuit pad, which is connected to the terminal 22 and the row line 18
And the terminal 22 and the lead line of the row line 19 are connected. This short-circuit pad 21 is obtained by forming a hole in the matrix substrate 11 and forming an ITO surface on the matrix substrate 11 in the terminal forming step.
The place where the short-circuit pad 21 is formed is where the main seal of the liquid crystal display element is formed, that is, where the seal member 20 on the matrix substrate 11 is bonded.

On the other hand, as the common substrate 12, this is shown in FIG.
Can be adopted as an example. In the first example shown in FIG. 4A, the ITO common electrode 17 is formed on the entire surface of the common substrate 12 and is also used as a short-circuit electrode. The main seal is completed with the seal member 20 interposed between the place where the short-circuit pad 21 of the matrix substrate 11 is formed and the main seal of the liquid crystal display device and the common electrode 17 of the common substrate 12. . As a result, the common line 12 is formed by connecting the row line 18 and the column line 19 through the seal member 20 having a relatively high resistance.
Since it can be connected to the common electrode 17 of the matrix substrate, there is room for discharging static electricity that has entered the matrix substrate 11 side.

In the second example shown in FIG. 4B, a short-circuit electrode 23 for collectively short-circuiting the row line 18 and the column line 19 is formed separately from the common electrode 17. The main seal is formed with the seal member 20 interposed between the place forming the main seal of the liquid crystal display element in which the short-circuit pad 21 of the matrix substrate 11 is formed and the short-circuit electrode 23 of the common substrate 12. Finalize. In this way, the row line 18 and the column line 19 are connected to the short circuit electrode 23 formed in a loop shape on the common substrate 12 via the seal member 20 having a relatively high resistance.

In the third example shown in FIG. 4 (c), the short-circuit electrode 24 for short-circuiting the row line 18 and the short-circuit electrode 25 for short-circuiting the column line 19 are formed separately and separately from the common electrode 17. In this case as well, as in the second example, the matrix substrate 11 and the common substrate 1 constitute the main seal of the liquid crystal display element in which the short-circuit pad 21 is formed.
The main seal is completed with the seal member 20 interposed between the two short-circuit electrodes 24 and 25, and the row line 18 and the column line 19 are separately formed on the common substrate 12 for short-circuit electrodes 24. , 25 via the sealing member 20 having a relatively high resistance.

[0012]

As described above, in the liquid crystal display device of the present invention, the sealing member 20 is provided on the matrix substrate 11.
Between the terminal 22 and the lead line of the row line 18 and between the terminal 22 and the column line 1 on the main seal portion 26 to which the
The short-circuit pad 21 for connecting the lead lines of 9 is formed, and the sealing member 20 is bonded to the main seal portion 26 of the matrix substrate 11 and the common substrate 1.
Since it is assumed that the two common electrodes 17 or the short-circuit electrodes 23, 24 and 25 are provided, the main seal is performed and the line electrodes 18 and the column lines 19 are connected to the common electrode 17 or the short-circuit electrodes 23, 24 and 25. It is very convenient because the electrical connection can be made at once.

The present invention requires a step of forming the short-circuit pad 21, which is also formed by punching the matrix substrate 11 during the terminal forming step.
The short-circuit pad forming step of applying ITO to the ITO surface to form the ITO surface is simply added, and no additional manufacturing steps are added based on the introduction of the short-circuit pad forming step.

If the all-line short circuit method is adopted in the manufacturing stage of the matrix substrate 11 and the matrix substrate 11 and the common substrate 12 according to the present invention are bonded together after cutting the substrate, the device is completed including during manufacturing of the liquid crystal display device. It is possible to provide a liquid crystal display element that is not damaged by static electricity afterwards.

[Brief description of drawings]

FIG. 1 is a diagram showing a pixel matrix of a conventional example of a liquid crystal display element.

FIG. 2 is a diagram showing a cross section of a conventional example of a liquid crystal display element.

FIG. 3 is a diagram showing a top view of a matrix substrate of the present invention.

FIG. 4 is a diagram showing a common substrate of the present invention.

FIG. 5 is a diagram showing a cross section of a liquid crystal display element of the present invention.

[Explanation of symbols]

 11 Matrix Substrate 12 Common Substrate 15 Pixel Electrode 16 Thin Film Transistor (TFT) 17 Common Electrode 18 Row Line 19 Column Line 20 Sealing Member 21 Short Circuit Pad 22 Terminal 23 Short Circuit Electrode 24 Short Circuit Electrode 25 Short Circuit Electrode 26 Main Seal Section

Claims (1)

[Claims] 1. An active liquid crystal in which row lines and column lines are formed, and active elements connected to the row lines and column lines and pixel electrodes connected to the active elements are formed at intersections of the row lines and column lines. A matrix substrate having a display pixel matrix is provided, a common substrate having a common electrode and a short-circuit electrode and facing the matrix substrate is provided, and the matrix substrate and the common substrate are anisotropically or relatively electrically conductive. In a liquid crystal display device bonded via a seal member having high resistance, the matrix substrate is further bonded with a seal member. In the main seal part, between terminals and lead lines between terminals and between lead lines between terminals and column lines. The short-circuit pad that connects the A liquid crystal display device, characterized in that it is a main seal part and a common electrode or a short circuit electrode of a common substrate.