Electrode wiring substrate and display device

• US 20060138461A1
• Filed: 09/16/2004
• Published: 06/29/2006
• Est. Priority Date: 09/19/2003
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Abe, Takao, Tanaka, Naoyuki, Sawada, Kohichi
• Granted Patent: US 7,352,426 B2
• Time in Patent Office: Days
• US Class Current: 257/202
• CPC Class Codes: G02F 1/13456 Cell terminals located on one side of the display only
• CPC Class Codes: G02F 1/136254 Checking; Testing
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line

Abstract

An electrode-wiring substrate includes first routing wires (108) made of gate material for forming gate electrode wires (105) and second routing wires (110) made of source material for forming source electrode wires (106). The first routing wires (108) and the second routing wires (110) are arranged alternately so as not to coincide with each other when viewed in plan. The second routing wires (110) are electrically connected to the gate electrode wires (105) via first contact holes (111) and to gate electrode terminals (102) via second contact holes (113).

Claims

1. An electrode-wiring substrate comprising:

a plurality of gate electrode wires which are formed on an insulating substrate;

a plurality of source electrode wires which intersect with the gate electrode wires, respectively;

an insulating layer which electrically insulates the gate electrode wires from the source electrode wires;

a plurality of switching elements which are formed near the intersections of the gate electrode wires and the source electrode wires, respectively;

a display region which includes a plurality of pixel electrodes connected to the switching elements, respectively;

a plurality of gate electrode terminals which are arranged at the periphery of the display region to input signals to the gate electrode wires, respectively;

a plurality of source electrode terminals which are arranged at the periphery of the display region to input signals to the source electrode wires, respectively;

a plurality of gate routing wires which are arranged at the periphery of the display region to connect the gate electrode wires to the gate electrode terminals, respectively; and

a plurality of source routing wires which are arranged at the periphery of the display region to connect the source electrode wires to the source electrode terminals, respectively, wherein

the gate routing wires and/or the source routing wires include first routing wires made of gate material for forming the gate electrode wires and second routing wires which are electrically insulated from the first routing wires by the insulating layer and made of source material for forming the source electrode wires and the first routing wires and the second routing wires are alternately arranged so as not to coincide with each other when viewed in plan and

the insulating layer includes at least a pair of a first connection hole and a second connection hole and the first connection hole electrically connects the first routing wire or the second routing wire to the gate electrode wire or the source electrode wire, while the second connection hole electrically connects the first routing wire or the second routing wire to the gate electrode terminal or the source electrode terminal.

2. An electrode-wiring substrate according to claim 1, wherein the display region is rectangular and the gate electrode terminals and the source electrode terminals are arranged in proximity to any one of the sides of the display region.

3. An electrode-wiring substrate according to claim 1, wherein the switching elements are thin film transistors.

4. An electrode-wiring substrate according to claim 1, wherein the gate routing wires include the first routing wires and the second routing wires, the first routing wires or the second routing wires further include wires which are formed on the insulating layer and made of the source material or the gate material and the gate electrode wires are each connected to the gate electrode terminals via connection holes of the same number formed in the insulating layer.

5. An electrode-wiring substrate according to claim 1, wherein the source routing wires include the first routing wires and the second routing wires, the first routing wires or the second routing wires further include wires which are formed on the insulating layer and made of the source material or the gate material and the source electrode wires are each connected to the source electrode terminals via connection holes of the same number formed in the insulating layer.

6. An electrode-wiring substrate according to claim 1, wherein each of the pixel electrodes is made of a transparent conductive film for transmissive display, a reflective conductive film for reflective display or a set of a transparent conductive film and a reflective conductive film which allows display in both transmissive and reflective modes.

7. A display device including an electrode-wiring substrate according to claim 1 and counter electrodes facing the electrode-wiring substrate.

8. A liquid crystal display device including an electrode-wiring substrate according to claim 1, a counter substrate facing the electrode-wiring substrate and a liquid crystal layer sandwiched between the electrode-wiring substrate and the counter electrode.