CN1540396A - Method and device for arranging conductive metal wires of display panel with point discharge - Google Patents

Abstract

A method and device for laying out conductive metal lines for a display panel with tip discharge. The present invention continues the ITO routing method (arc-shaped turning points, and a conductive metal wire frame surrounds the outer periphery of the straight and horizontal conductive metal lines). Without affecting the LCD display screen and the routing resistance, a metal pattern with a sharp corner is added to guide the instantaneous high-charge static electricity (ESD) to the routing pattern in the release area, thereby achieving static electricity dissipation, avoiding the burning and damage of the metal conductive circuit and the influence of static electricity on the module function.

Description

Display panel conducting metal line layout method and device with tip discharge

technical field

The present invention relates to a method and device for laying out conductive metal wires of a display panel with tip discharge, and in particular to a method that can apply the principle of tip discharge to the layout of LCD metal lines (ITO), so that the LCD module can operate in a very short time. Dissipating the electrostatic charge to improve the antistatic ability is a very innovative design idea.

Background technique

In view of the fact that when the LCD module encounters an instantaneous surge of electrostatic charge, it is easy to cause the LCD conductive metal line (ITO) to burn out, thereby affecting its module function. Therefore, it is necessary to integrate an electrostatic protection device in the overall module design, and the general design requires Adding an electrostatic protection circuit or component increases the volume of the LCD module or IC and increases the cost.

For example, the US patent application No. 20020088629A1 "Grounding device for a portable radio terminal" is mainly a device that combines the upper and lower boards to provide grounding, so that the RF end is connected to the main body , and the combination of LCD and FPC is also connected to the RF terminal, so that the static electricity on the LCD can be conducted to the main body through the FPC, and the electrostatic charge can be eliminated.

The U.S. Patent Application No. 20020105512A1 "Liquid crystal device driver Circuit for electrostatic discharge protection" is mainly a kind of LCD driver circuit with electrostatic protection. This circuit includes the Nth first input The Pads correspond to the Nth volts input first (N>1), and the electrostatic protection devices are individually connected to the Pads, and all the protection devices may include thin-film transistors (Thing gate-oxide transistor).

US No. 6337722B1 patent application for "Liquid crystal display panel having electrostatic discharge prevention circuitry" is mainly a liquid crystal display plane, including an electrostatic protection circuit, and the driving circuit is on the data line Connect multiple gate lines, and dissipate static electricity by touching the gate lines with static electricity.

The US patent application No. 5901022 "Charged Device Mode ESD Protection Circuit (Charged Device Mode ESD Protection Circuit)" is mainly a protection circuit for the electrostatic discharge mode of the component charging mode.

The U.S. No. 5852315 "N-Sided Polygonal CeU Layout for Multiple Cell Transistor" patent case is mainly a new layout method to realize complementary metal oxide semiconductor Transistor components of integrated circuits.

Japanese patent application No. 08-288404 "Latchup-Free Fully-protected CMOS On-Chip ESD Protection Circuit (Latchup-Free Fully-protected CMOS On-Chip ESD Protection Circuit)" is mainly an electrostatic discharge protection circuit that can provide four different The electrostatic effect electric path is used to comprehensively protect the input stage of the complementary metal oxide semiconductor integrated circuit.

Japan No. 09-162303 "ESD Protection Circuit with Gate-Couple SCRStructure" patent application, mainly the electrostatic discharge protection circuit of the present invention is a gate-coupled PTLSCR Constructed with the NTLSCR component.

This known solution of "an electrostatic discharge protection circuit for VDD and VSS" is mainly an electrostatic discharge protection circuit, which is connected between the VDD and VSS power lines of the integrated circuit. When electrostatic discharge occurs, the protection circuit can provide a Short the channel to bypass the ESD current.

In addition, the known solution of "component charging mode electrostatic discharge protection circuit" mainly proposes a protection circuit for component charging mode electrostatic discharge mode. The deficiencies of the aforementioned patents are as follows:

1. Add capacitors or anti-static components to the glass: the disadvantage is that it is not easy to realize in the manufacturing process, because the glass is easy to break when connecting the components on the machine, and the wiring space is reduced, and the design space is relatively small.

2. Design an ESD protection device on the FPC: the disadvantage is that it cannot completely prevent the harm of static electricity, because static electricity does not completely enter from the FPC, and may also enter from the ITO on the glass.

3. Simply increase the impedance value of the wiring: the disadvantage is that when the power is converted into heat energy, it is easy to cause heat concentration due to the change of the thickness of the wiring, which is not easy to dissipate heat, and burns out the short circuit.

4. Impedance value is too low: the electrostatic protection function cannot be achieved.

5. Too high impedance value: digital and analog signals will be attenuated due to too high impedance, which will affect the working performance of IC.

Contents of the invention

The main purpose of the present invention is to solve the above-mentioned traditional defects and avoid the existence of defects. The present invention adopts a dredging method to divert the electrostatic charge to the area where it can be dissipated, so as to avoid burning the conductive circuit (ITO) by the instantaneous high-energy electrostatic charge, thereby achieving static electricity. Anti-static effect, at the same time, this invention not only simplifies the module design (no need to add electrostatic protection components), simplifies the manufacturing process (avoiding the addition of process procedures), but also can improve the anti-static hazard ability of LCD modules. This technology is very popular in the module industry There is a great benefit in using value.

In order to achieve the above object, the present invention adopts a new ITO layout form to continue the ITO routing method (the turning point is arc-shaped, and there is a conductive metal wire frame on the periphery of the straight and horizontal conductive metal wire), without affecting the LCD display screen and routing. In the case of resistance value, add a metal pattern with sharp corners to guide the electrostatic charge to accumulate in this area and release the charge. When the LCD module is subjected to electrostatic charge, it can be quickly and effectively dissipated from the tip to avoid module function. affected by static electricity.

Description of drawings

FIG. 1-1 is a schematic diagram of an LCD display panel of the present invention.

Figure 1-2 is a partially enlarged schematic diagram of the right side of Figure 1-1.

Figure 1-3 is a partially enlarged schematic diagram on the left side of Figure 1-1.

Detailed ways

Relevant detailed content and technical specification of the present invention, now cooperate accompanying drawing to illustrate as follows:

Please refer to FIG. 1-1, which is a schematic diagram of an LCD display panel of the present invention. As shown in the figure: the conductive metal line layout method of the LCD display panel with tip discharge of the present invention adopts a new ITO layout form, so that the charge surge generated by the LCD module in static electricity can be quickly dissipated by using the tip discharge. In order to avoid affecting the function of the module, and then achieve the effect of electrostatic protection.

The tip discharge mentioned above is that when the surface area of the metal shrinks and the radius of curvature shrinks, it is easy to gather electric ions, making it a high-charge energy accumulation area. A potential difference is generated to release ions (the so-called discharge) to achieve charge balance. This principle is applied to the metal (ITO) wiring layout of the LCD to dredge and dissipate the electrostatic (ESD) surge charges on the LCD. The incoming metal (ITO) traces are burned, thereby strengthening the anti-static damage ability of the LCD module.

In order to achieve the above-mentioned purpose, the device adopted by the present invention is to increase the cutting-edge ITO layout on the LCD display panel 1 to strengthen the dredging and dissipate static electricity. Connected chip (IC) connection area 3, a display 4 connected to the aforementioned chip (IC) connection area 3, and a discharge structure 5 that is arranged on the aforementioned connection terminal 2, the chip (IC) connection area 3 and the periphery of the display 4 constituted; of which,

The above-mentioned connection terminal 2 is composed of a plurality of pins 21, and after being connected with the thin film circuit (not shown in the figure), an external control signal can be input into the LCD display panel 1 to drive the chip (IC) connection area 3 The installed drive unit (not shown in the figure);

This chip (IC) connection area 3 can install a driving unit (not shown) that drives the display 4, and this chip (IC) connection area 3 is connected with the display area 2 through row and column wiring 6, to output a drive signal to drive Display 4;

After the display 4 is connected to the aforementioned chip (IC) connection area 3 through the row and column lines 6, and driven by the drive signal output by the drive unit installed on the chip (IC) connection area 3, it can be used on the display 4. The image screen is displayed on the display screen 41;

The discharge structure 5 is surrounded by a metal wire (ITO) 7 on the periphery of the row and column wiring 6, and is connected to the ground terminal 211 of the connecting terminal 2. The peripheral metal wire 7 does not affect the IC signal wiring. Add discharge metal pattern 51 with right-angled squares or pointed blocks, or on surrounding lines, add discharge bump blocks.

Please also refer to Figures 1-2 and 1-3, which are partially enlarged schematic diagrams on the left and right sides of Figure 1-1. In this way, when the LCD module is subjected to electrostatic charge, the metal pattern 51 can be quickly and effectively channeled from the tip, so as to prevent the function of the module from being affected by the static electricity. That is to say, using the principle that the metal tip of the metal pattern 51 can accumulate charges and release them, it can effectively guide the instantaneous high-charge static electricity (ESD) to the wiring pattern in the release area, thereby achieving static electricity dissipation, preventing the metal conductive circuit from being burned and damaged and the function of the module. affected by static electricity.

As can be seen from the above, after the present invention improves the transmission defect, the added advantages are as follows:

1. Additional components are required to reduce other effects caused by adding components.

2. Simplify the production process and complexity.

3. It achieves the effect of electrostatic protection by channeling and dissipating the electrostatic charge, which is different from the general blocking method.

4. It only needs to use the ITO wiring method on the LCD to increase the electrostatic protection ability. Compared with the general electrostatic protection device, the design and production costs are reduced.

Further, the cutting-edge ITO layout method is added to strengthen the dredging and dissipating static electricity. In addition to using the above method, the ITO line can also be divided into empty ITO lines and conductive ITO lines in the ITO line of the upper glass of the LCD. Space, the opposite ends have a tapered shape to facilitate charge accumulation and discharge.

The foregoing are only preferred embodiments of the present invention, and are not intended to limit the implementation scope of the present invention. That is, all equivalent changes and modifications made according to the patent scope of the present invention are covered by the patent scope of the present invention.

Claims (6)

1. A kind of display panel conducting metal wire layout device with point discharge, the LCD display panel (1) includes at least: a link (2), a chip (IC) linking area (3), a display area, drive the drive unit installed on a chip (IC) linking area (3) after the external control signal input, show the image in passing through line (6) drive display (4) of ranks by the drive unit, its characterized in that: the periphery of the row-column wiring (6) is surrounded by a circle of metal wires (7) (ITO) and is connected with the grounding end (211) of the connecting end (2) to form a discharging structure (5), so that the charge surge generated by the LCD module under static electricity can be quickly dissipated by utilizing point discharge to avoid influencing the function of the module, and the electrostatic protection effect is further achieved.

2. The edm layout device of claim 1, wherein the peripheral metal lines (7) are added with discharge metal patterns (51) having right-angled squares without affecting the IC signal traces thereof.

3. The device according to claim 1, wherein the peripheral metal lines (7) are added with discharge metal patterns (51) having tip blocks without affecting the IC signal traces thereof.

4. The device according to claim 1, wherein the peripheral metal lines (7) can increase the bump area of discharge on the peripheral lines without affecting the IC signal routing.

5. The device of claim 1, wherein the tip-discharge-enhanced ITO layout is added to enhance electrostatic dissipation, and further comprises a space (space) between the ITO traces of the LCD upper glass for separating the ITO traces into a depletion ITO trace and a conductive ITO trace, and the opposite ends of the space are tapered to facilitate charge accumulation and discharge.

6. A display panel conductive metal wire layout method with point discharge is characterized in that a new ITO layout mode is adopted, an ITO wiring mode is continued (a conductive metal wire (7) frame is surrounded on the periphery of a circular arc-shaped straight transverse conductive metal wire (7) at a turning part), under the condition that an LCD display picture and wiring resistance are not affected, a metal pattern (51) with a sharp corner is added to guide electrostatic charges to be gathered in the area to release the charges, when an LCD module bears the electrostatic charges, the conductive metal wire layout method can be quickly and effectively dredged from the point position, and the function of the module is prevented from being affected by the static.