Touch display device

A touch display device is provided. The touch display device comprises: a first substrate including plural row wires, a plurality of column wires and a plurality of pixel drive elements, and the row wires and the column wires are interleaved to form a pixel matrix, and the pixel drive elements are disposed on pixels of the pixel matrix; a second substrate disposed opposite the first substrate; a display medium interposed between inner sides of the first substrate and the second substrate; a plurality of touch electrodes disposed on the inner side of the first substrate or the second substrate; an electroconductive protection circuit disposed outside the pixel matrix on the first substrate, electrically isolated from the row wires and the column wires; and an electroconductive control assembly, electrically connected to the electroconductive protection circuit and the touch electrodes.

BACKGROUND

Technical Field

This disclosure relates to a display device, and more particularly to a touch display device.

Related Art

Flat panel displays have been widely used in various fields. The liquid crystal display device has superior features comprising the thin body, low power consumption and radiationless feature, has been gradually replaced the conventional cathode ray tube display device, and is applied to many kinds of electronic products, such as a mobile phone, a portable multimedia device, a notebook computer, a liquid crystal television, a liquid crystal screen and the like.

The liquid crystal display device comprises elements comprising a display panel. An active matrix type liquid crystal display panel is an ordinary display panel at present and comprises an active matrix substrate, opposing substrates, and a liquid crystal layer interposed between the two substrates. A plurality of row wires, column wires and pixels are disposed on the active matrix substrate. The pixel contains a pixel drive element. The pixel drive elements are connected to the row wires and the column wires. The ordinary pixel drive element is a thin film transistor. The row wire and the column wire are usually metal wires.

In the process of manufacturing the panel, for example, when the alignment film is disposed, static electricity may be generated by friction, and the static electricity generated by friction may cause the damage of the pixel drive element, and cause defects in the pixels. In order to eliminate the damage of the liquid crystal display panel caused by the static electricity, short-circuit wiring may be disposed on the active matrix substrate to electrically connect the row wires and column wires together, so that the potentials of the row wires and column wires are the same. Once the short-circuit wiring is cut, the liquid crystal display panel again encounters the problem caused by the static electricity, such as the feature defect caused by the component breakdown and the component breakdown.

SUMMARY

In view of the deficiencies of the prior art, the inventor has obtained this disclosure after the reach and development have been made. An objective of this disclosure is to provide a touch display device, and the pixel drive element can be protected from having the problem caused by static electricity.

This disclosure provides a touch display device, comprising: a first substrate including a plurality of row wires, a plurality of column wires and a plurality of pixel drive elements, and the row wires and the column wires are interleaved to form a pixel matrix, and the pixel drive elements are disposed on pixels of the pixel matrix; a second substrate disposed opposite the first substrate; a display medium interposed between inner sides of the first substrate and the second substrate; a plurality of touch electrodes disposed on the inner side of the first substrate or the second substrate; an electroconductive protection circuit disposed outside the pixel matrix on the first substrate, electrically isolated from the row wires and the column wires; and an electroconductive control assembly, electrically connected to the electroconductive protection circuit and the touch electrodes.

This disclosure provides a touch display device, comprising: a first substrate including a plurality of row wires, a plurality of column wires and a plurality of pixel drive elements, and the row wires and the column wires are interleaved to form a pixel matrix, and the pixel drive elements are disposed on pixels of the pixel matrix; a second substrate disposed opposite the first substrate; a display medium interposed between inner sides of the first substrate and the second substrate; a plurality of touch electrodes disposed outside the second substrate; an electroconductive protection circuit disposed outside the pixel matrix on the first substrate, electrically isolated from the row wires and the column wires; and an electroconductive control assembly, electrically connected to the electroconductive protection circuit and the touch electrodes.

In one embodiment, the touch electrodes are formed on an outer surface of the second substrate.

In one embodiment, the touch electrodes are formed on a touch panel, and the touch panel is disposed on an outer surface of a second substrate.

In one embodiment, the electroconductive protection circuit is a remaining portion of short-circuit wiring originally connected to the row wires and the column wires on the first substrate obtained after cutting.

In one embodiment, the electroconductive control assembly comprises two diodes, which have reversely biased configurations serially connected together, and are electrically connected between the electroconductive protection circuit and the touch electrode.

In one embodiment, the electroconductive control assembly is a switch which selectively electrically connects the touch electrode to the electroconductive protection circuit or a touch circuit.

In one embodiment, the electroconductive protection circuit is disposed along an edge of the first substrate.

In one embodiment, the touch display device further comprising: a row driver electrically connected to the row wires on one side of the first substrate without the electroconductive protection circuit; and a column driver electrically connected to the column wires on the one side of the first substrate without the electroconductive protection circuit.

In one embodiment, the touch display device further comprising: the touch display device further comprising: a row driver electrically connected to the row wires on one side of the first substrate without the electroconductive protection circuit; and a column driver electrically connected to the column wires on the one side of the first substrate without the electroconductive protection circuit.

In one embodiment, the touch display device further comprising: a sealing member interposed between inner sides of the first substrate and the second substrate, located between the pixel matrix and the electroconductive protection circuit and seals the display medium.

In one embodiment, the touch electrodes are commonly connected to the electroconductive control assembly.

In one embodiment, the display medium, the first substrate and the second substrate function as a transversal electric field effect display panel.

In summary, in the touch display device of this disclosure, the electroconductive protection circuit is electrically isolated from the row wires and the column wires, and is electrically connected to the touch electrode. Therefore, the pixel drive element can be protected from having the problem caused by static electricity.

DETAILED DESCRIPTION OF INVENTION

Specific structural and functional details disclosed herein are merely representative and are for purposes of describing example embodiments of the present invention. However, the present invention may be embodied in many alternate forms, and should not be interpreted as being limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the term “center”, “lateral”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “orientation or positional relationship indicated top”, “bottom”, “inner”, “outer” as the location or position based on the relationship shown in the drawings, for convenience of description only and the invention is to simplify the present description, not indicate or imply that refers to devices or elements must have a specific orientation, the orientation of a particular configuration and operation, cannot be construed as limiting the present invention. In addition, the terms “first”, “second” are used to indicate or imply relative importance or the number of technical features specified implicitly indicated the purpose of description and should not be understood. Thus, there is defined “first”, “second” features may be explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, the meaning of “more” is two or more. Further, the term “comprising” and any variations thereof, are intended to cover non-exclusive inclusion.

In the description of the present invention, it is noted that, unless otherwise expressly specified or limited, the terms “mounted,” “connected to”, “connected” are to be broadly understood, for example, may be a fixed connection, may be a detachable connection, or integrally connected; may be a mechanical connector may be electrically connected; may be directly connected, can also be connected indirectly through intervening structures, it may be in communication the interior of the two elements. Those of ordinary skill in the art, be appreciated that the specific circumstances of the specific meanings in the present invention.

The terminology used herein is for describing particular embodiments only and is not intended to limit embodiments to an exemplary embodiment. Unless the context clearly indicates otherwise, singular forms as used herein, “a”, “an” are intended to include the plural. It should also be understood that, the terms “comprising” and/or “comprising”, as used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or combinations thereof.

The touch display device of a preferable embodiment of this disclosure will be further described with reference toFIGS. 1 to 10, and units with similar structure are represented by the same reference numerals.

FIG. 1Ais a schematic view showing a touch display device of one embodiment of this disclosure.FIG. 1Bis a schematic side view showing a touch display device of one embodiment of this disclosure. InFIGS. 1A and 1B, a first substrate1comprises a substrate11, a plurality of row wires12, a plurality of column wires13, a plurality of unit pixels14, an electroconductive protection circuit15, an area16and an area17. The row wires12and the column wires13are interleaved to form a pixel matrix DM, and the unit pixels14are disposed inside the pixel matrix DM. The first substrate1is, for example, an active matrix substrate.

The substrate11is, for example, an insulation transparent substrate, and the material thereof may be a rigid material or a flexible material, such as glass or plastic and the like.

In the manufacturing process, the electroconductive protection circuit15is firstly connected to the row wires12and the column wires13, and the electroconductive protection circuit15is disposed outside the pixel matrix DM on the first substrate1. Therefore, in the manufacturing process, the electroconductive protection circuit15may serve as the short-circuit wiring to provide an electrostatic protection function, thereby electrically connecting the row wires12to the column wires13, making the wires have equal potentials, and eliminating the damage of the liquid crystal display panel caused by the static electricity.

The electroconductive protection circuit15may be made together with the row wires12and the column wires13. For example, a section151of the electroconductive protection circuit15is formed on the substrate11together with the row wire12, a section152of the electroconductive protection circuit15is formed on the substrate11together with the column wire13, and the section151is connected to the section152. Since the row wires and the column wires are usually metal wires, the electroconductive protection circuit15is also a metal wire.

Wire drivers connected to the wires may be disposed in the area16and the area17. For example, the row driver is disposed in the area16, and the row driver is connected to the row wire12and outputs a row drive signal to the row wire12; and the column driver is disposed in the area17, and the column driver is connected to the column wire13and outputs a column drive signal to the column wire13. Alternatively, the driver is not directly disposed in the area16and the area17. Instead, a trace or a connection pad connected to the wire driver is disposed. The trace or the connection pad of the area16is connected to the row wire12. The trace or the connection pad of the area17is connected to the column wire13. The row driver and the column driver, which are respectively electrically connected to the area16and the area17and thus respectively electrically connected to the row wire12and the column wire13through flat cables or circuit boards and the like, can output the row drive signal and the column drive signal to the row wire12and the column wire13, respectively.

For example, the row wire12is a scan line and comprises a plurality of scan lines S1to Sm, the row driver is a scan drive circuit, and the row drive signal is a scan drive signal. The column wire is a data line and comprises a plurality of data lines D1to Dn, the column driver is a data drive circuit, and a column drive signal is a data drive signal. The data lines D1to Dn and the scan lines S1to Sm are interleaved to define the plurality of unit pixels14.

InFIG. 1A, the electroconductive protection circuit15is disposed along the edge on the first substrate1. For example, the section151is disposed along the edge parallel to the row wire12, and the section152is disposed along the edge parallel to the column wire13. Opposite ends of the row wire12are respectively connected to the electroconductive protection circuit15and the area16, and opposite ends of the column wire13are respectively connected to the electroconductive protection circuit15and the area17.

For the row driver disposed on the area16, the row driver is connected to the row wire12and located on one side of the first substrate1without the electroconductive protection circuit15, and the row driver is electrically connected to the row wires12on one side of the first substrate1without the electroconductive protection circuit15. For the column driver disposed on the area17, the column driver is connected to the column wire13and located on one side of the first substrate1without the electroconductive protection circuit15, and the column driver is electrically connected to the column wires13on the one side of the first substrate11without the electroconductive protection circuit15. The row driver and the column driver are located on different sides of the first substrate1.

On the other hand, for the row driver not directly disposed on the area16, the row driver is electrically connected to the row wires12on one side of the first substrate1without the electroconductive protection circuit15. For the column driver not directly disposed on the area17, the column driver is electrically connected to the column wires13on the one side of the first substrate11without the electroconductive protection circuit15.

FIG. 1Cis a schematic view showing a unit pixel according to one embodiment of this disclosure. As shown inFIG. 1C, the pixel drive element of the unit pixel14comprises a thin film transistor141and a pixel capacitor142. The thin film transistor141is used as a switch, and a gate is connected to the row wire12, a source is connected to the column wire13, and a drain is connected to the pixel capacitor142. The scan drive signal on the row wire12may control the thin film transistor141to turn on, thereby enabling the data drive signal on the column wire13to be written into the pixel capacitor142.

The pixel capacitor142is a liquid crystal capacitor and constituted by two electrodes. Generally speaking, the liquid crystal capacitor comprises a pixel electrode and a common electrode, the drain of the thin film transistor141is connected to the pixel electrode, and the common electrode is connected to a common voltage (Vcom). In some embodiments, the voltage value of the common voltage may be 0 volts (grounded). When the gate of the thin film transistor141is applied with a scan drive signal by the row wire12to turn on, the data voltage of the data drive signal on the column wire13is applied to the pixel electrode through the thin film transistor141, so that a voltage difference is generated between the pixel electrode and the common electrode, the liquid crystal capacitor stores the potential difference written by the data drive signal to drive liquid crystal molecules between the two electrodes to rotate.

The materials of the pixel electrode and the common electrode may be, for example but without limitation to, transparent electroconductive materials comprising indium-tin oxide (ITO), indium-zinc oxide (IZO) or the like.

Different types of display panels have different configurations of the pixel electrode and the common electrode. For the transversal electric field effect display panel, both the pixel electrode and the common electrode are formed on the first substrate1. That is, they and the thin film transistor141are formed on the same substrate11. Under this architecture, one whole piece of the common electrode needs not to be formed on the opposing substrates, so that there is more space to form the touch electrode. For the multi-domain vertical alignment panel or twisted nematic panel, the one whole piece of the common electrode is formed on the opposing substrates, both the pixel electrode and the thin film transistor141are formed on the first substrate1, and the pixel electrode on the first substrate1and the common electrode on the opposing substrate constitute the liquid crystal capacitor.

FIG. 1Cis a basic element that illustrates a typical unit pixel, so only one thin film transistor141and one pixel capacitor142are shown. In other implementation aspects, the unit pixel may also comprise a plurality of thin film transistors and other capacitive elements. In one embodiment, each pixel may further have a storage electrode (not shown), which may form an auxiliary capacitor together with the second electrode.

Referring back toFIG. 1A, the electroconductive protection circuit15is located on the opposite sides of the area16and the area17on the first substrate1, the electroconductive protection circuit15is a portion of the short-circuit wiring, the short-circuit wiring is used for short-circuiting the end portion of the row wire12and the end portion of the column wire13to prevent static electricity from damaging the display panel, such as breakdown and characteristic defects of the thin film transistor5.

The electroconductive protection circuit15should be disconnected from the row wire12and the column wire13so that the liquid crystal panel can work normally, and the electroconductive protection circuit15may be disconnected from the row wires12and the column wires13by the laser beam along alternate long or short dashed lines or outside the dashed lines shown inFIG. 1. The electroconductive protection circuit15is a remaining portion of the short-circuit wiring originally connected to the row wires12and the column wires13on the first substrate1obtained after cutting.

After the electroconductive protection circuit15is cut from the row wire12and the column wire13, the liquid crystal display panel again faces the problem caused by static electricity, such as feature defects caused by the component breakdown and the component breakdown. In order to avoid the problem, the electroconductive protection circuit15may be electrically connected to the touch electrode in the touch display device.

FIG. 2Ais a schematic side view showing a touch display device of one embodiment of this disclosure.FIG. 2Bis a schematic side view showing a touch display device of one embodiment of this disclosure. As shown inFIGS. 2A and 2B, the electroconductive protection circuit15is at a distance from the row wire12or the column wire13. The touch display device comprises the first substrate1, a second substrate2, a display medium3and a sealing member4. The second substrate2is disposed opposite to the first substrate1. If the transversal electric field effect display technology is used, then the display medium3, the first substrate1and the second substrate2function as a transversal electric field effect display panel.

The display medium3is interposed between inner sides of the first substrate1and the second substrate2, and the display medium3is, for example, a liquid crystal. The sealing member4is interposed between the inner sides of the first substrate1and the second substrate2, located between the pixel matrix DM and the electroconductive protection circuit15, and seals the display medium3.

The second substrate2comprises a substrate21and a plurality of touch electrodes22, and the touch electrodes22are formed on the substrate21. The electroconductive protection circuit15is electrically connected to the touch electrode22.

In addition, the second substrate2may be provided with a filter layer (not shown), and the first substrate1and the second substrate2have elements, such as an alignment film and the like (not shown).

InFIG. 2A, the touch display device further comprises a conductive component5, and the conductive component5is interposed between the inner sides of the first substrate1and the second substrate2and connected to the electroconductive protection circuit15and an extension23of a touch electrode22. The electroconductive protection circuit15is electrically connected to the touch electrode22through the conductive component5disposed on the first substrate1and the second substrate2. The conductive component5may directly contact the electroconductive protection circuit15and the touch electrode22.

InFIG. 2B, the touch display device further comprises an electroconductive trace6, and the electroconductive trace6is disposed outside the first substrate1and the second substrate2, and connected to the electroconductive protection circuit15and the extension23of the touch electrode22. The electroconductive protection circuit15is electrically connected to the touch electrode22through the electroconductive trace6disposed outside the first substrate1and the second substrate2, and the electroconductive trace6may contact the electroconductive protection circuit15and the touch electrode22through the connection cables.

Under the architectures ofFIGS. 2A and 2B, the row wire12and the column wire13can be individually operated. Since the liquid crystal display panel uses the remaining short-circuit as a protective wiring, the step of forming the protective wiring can be omitted. In addition, the conventional substrate having the short-circuit wiring is used as the first substrate1, and the remaining short-circuit is electrically connected to the touch electrode22on the second substrate2. The electroconductive protection circuit15can still prevent the damage caused by external static electricity on the display panel.

InFIG. 3A, an electroconductive control assembly7comprises two diodes71and72, which have reversely biased configurations serially connected together, and are electrically connected between the electroconductive protection circuit15and the touch electrode22. The diodes71and72are located outside the first substrate1and the second substrate2, and connected to the electroconductive protection circuit15and the extension23of the touch electrode22. The electroconductive protection circuit15is electrically connected to the touch electrode22through the diodes71and72disposed outside the first substrate1and the second substrate2, and the diodes71and72may contact the electroconductive protection circuit15and the touch electrode22through the connection cables.

Under general operating conditions, because the diode72is reversely biased to the touch electrode22, the signal on the touch electrode22is not transmitted to the electroconductive protection circuit15. Because the diode71is reversely biased to the electroconductive protection circuit15, the small noise on the electroconductive protection circuit15is also not transmitted to the touch electrode22, so that the touch electrode22can operate independently.

When the static electricity is generated, the instantaneous voltage will be higher than the reversely biased of the diodes71and72. Therefore, the diodes71and72are turned on, so that the electroconductive protection circuit15is electrically connected to the touch electrode22. The electroconductive protection circuit15can prevent the damage caused by external static electricity on the pixel of the display panel.

InFIG. 3B, the electroconductive control assembly7comprises a switch73which selectively electrically connects the touch electrode22to the electroconductive protection circuit15or a touch circuit81. The switch73is located outside the first substrate1and the second substrate2and connected to the electroconductive protection circuit15and the extension23of the touch electrode22. The electroconductive protection circuit15is electrically connected to the touch electrode22through the switch73disposed outside the first substrate1and the second substrate2, and the switch73may contact the electroconductive protection circuit15and the touch electrode22through the connection cables.

A control circuit82controls the switch73to electrically connect the electroconductive protection circuit15or the touch circuit81. Under general operating conditions, the control circuit82controls the switch73, so that the touch electrode22is electrically connected to the touch circuit81, thereby carrying out the conventional touch function. In the case where the static electricity is generated, the control circuit82controls the switch73, so that the touch electrode22is electrically connected to the electroconductive protection circuit15, thereby carrying out the electrostatic protection function.

For example, the control circuit82can switch the target electrically connected to the touch electrode22in a time-sharing manner. For example, the switch73is switched from the touch circuit81to the electroconductive protection circuit15every other period of time. At the same time, the touch circuit81does not perform the touch function to prevent the electrostatic damage on the electroconductive protection circuit15and the touch electrode22. The switch73is again switched from the electroconductive protection circuit15to the touch circuit81every period of time. At the same time, the touch circuit81and the touch electrode22perform the touch function. Since the switch73does not allow the touch electrode22to be electrically connected to the electroconductive protection circuit15, the small noise on the electroconductive protection circuit15is also not transmitted to the touch electrode22, so that the touch electrode22can operate independently.

The control circuit82is, for example, a controller in the display panel, and the touch circuit81is, for example, a touch detection circuit or a touch excitation circuit.

Under the architectures ofFIGS. 3A and 3B, the row wire12and the column wire13can be individually operated. The touch electrode22may also be individually operated. Since the liquid crystal display panel uses the remaining short-circuit as a protective wiring, the step of forming the protective wiring can be omitted. In addition, the conventional substrate having the short-circuit wiring is used as the first substrate1, and the remaining short-circuit is electrically connected to the touch electrode22on the second substrate2. The electroconductive protection circuit15can still prevent the damage caused by external static electricity on the display panel.

FIG. 4Ais a schematic view showing electrical connection positions of the electroconductive protection circuit of this disclosure. As shown inFIG. 4A, the section151of the electroconductive protection circuit15is directly used as a terminal connected the conductive component5inFIG. 2A. On the second substrate2, the touch electrode22has the corresponding extension23as a terminal connected to the conductive component5inFIG. 2A, thereby implementing the electrical connection. In addition,FIG. 4Aonly illustrates the section151parallel to the row wire12as an example. The section151can also directly used as a terminal connected the conductive component5inFIG. 4A. On the second substrate2, the touch electrode22has the corresponding extension23as a terminal connected to the conductive component5inFIG. 2A, thereby implementing the electrical connection.

FIG. 4Bis a schematic view showing electrical connection positions of the electroconductive protection circuit of this disclosure. As shown inFIG. 4B, the section151of the electroconductive protection circuit15extends to an end portion153, and the end portion153is used as a terminal connected to the conductive component5inFIG. 2A, and on the second substrate2, the touch electrode22has the corresponding extension23as a terminal connected to the conductive component5inFIG. 2A, thereby implementing the electrical connection. In addition,FIG. 4Bonly illustrates the section151parallel to the row wire12as an example, the section152may also extend to another end portion, the another end portion is located beside the area17, and the another end portion is used as a terminal connected to the conductive component5inFIG. 2A, and on the second substrate2, the touch electrode22has the corresponding extension23as a terminal connected to the conductive component5inFIG. 2A, thereby implementing the electrical connection.

In addition, inFIG. 4B, the end portion153or the another end portion may be used as a terminal electrically connected to the electroconductive trace6inFIG. 2B, on the second substrate2, the touch electrode22has the corresponding extension23as a terminal connected to the electroconductive trace6inFIG. 2B, thereby implementing the electrical connection.

In addition, inFIG. 4B, the section151of the electroconductive protection circuit15extends to the end portion153, and the end portion153is used as a terminal electrically connected to the electroconductive control assembly7inFIG. 3A or 3B, and on the second substrate2, the touch electrode22has the corresponding extension23as a terminal connected to the electroconductive control assembly7inFIG. 3Aor3B, thereby implementing the electrical connection. In addition,FIG. 4Bonly illustrates the section151parallel to the row wire12as an example, the section152may also extend to another end portion, the another end portion is located beside the area17, and the another end portion is used as a terminal electrically connected to the electroconductive control assembly7inFIG. 3A or 3B, and on the second substrate2, the touch electrode22has the corresponding extension23as a terminal connected to the electroconductive control assembly7inFIG. 3A or 3B, thereby implementing the electrical connection.

FIG. 5Ais a schematic view showing a touch electrode of this disclosure.FIG. 5Bis a schematic view showing a touch electrode of this disclosure. As shown inFIGS. 5A and 5B, there are a plurality of touch electrodes22on the second substrate2, and the touch electrodes22are commonly connected to the extension23. In order to reduce the interference, the extension23between the plurality of touch electrodes22may be designed to be narrower. For example, the width of the extension23is narrower than that of the touch electrode22. For one touch electrode22, the equivalent resistance of the extension23and the other touch electrodes22will thus become larger, this can prevent the signal on the touch electrode22from being transmitted to the other touch electrodes22to cause interference, and the touch electrode22is not interfered by the signals on the other touch electrodes22.

In addition, the touch electrode22may not be connected to each other, and each of the extensions23is connected to the touch electrode22.

In addition,FIGS. 5A and 5Billustrate the arrangement of the touch electrodes22and do not limit the shape of the touch electrode22. Generally, the unit shape of the touch electrode22is a rhombus.

InFIGS. 5A and 5B, a touch circuit connecting to the touch electrode22may be disposed in an area24and an area25. Alternatively, the touch circuit is not directly disposed in the area24and the area25, but the trace or the connection pad connected to the touch circuit is provided. The touch circuit is electrically connected to the area24and the area25through flat cables or circuit boards and the like.

InFIG. 5A, the touch electrode22is one part of the touch electrode of the touch display device, and another part of the touch electrode of the touch display device is disposed on the first substrate1. The touch electrode22may be a detection electrode or an excitation electrode. The touch electrode22has a plurality of rows R1to Rx.

InFIG. 5B, the touch electrodes22are the whole touch electrodes of the touch display device, and the touch electrodes are arranged in an array. The touch electrodes22may be divided into detection electrodes and excitation electrodes. For example, the row touch electrode22is the detection electrode, and the column touch electrode22is the excitation electrode; or the row touch electrode22is the excitation electrode, and the column touch electrode22is the detection electrode. The touch electrode22has a plurality of rows R1to Rx and a plurality of columns Cl to Cy.

In summary, in the touch display device of this disclosure, the electroconductive protection circuit is electrically isolated from the row wires and the column wires, and is electrically connected to the touch electrode. Therefore, the pixel drive element can be protected from having the problem caused by static electricity.

The above embodiments are described by taking the in-cell touch display device as an example, and the following is described by taking an add-on touch display device as an example.

FIG. 6Ais a schematic side view showing a touch display device of one embodiment of this disclosure.FIG. 6Bis a schematic side view showing a touch display device of one embodiment of this disclosure. As shown inFIG. 6AandFIG. 6B, the electroconductive protection circuit15is at a distance from the row wire12or the column wire13. The touch display device comprises the first substrate1a, a second substrate2a, a display medium3and a sealing member4. The second substrate2ais disposed opposite to the first substrate1a.

The display medium3is interposed between inner sides of the first substrate1aand the second substrate2a, and the display medium3is, for example, a liquid crystal. The sealing member4is interposed between the inner sides of the first substrate1aand the second substrate2a, located between the pixel matrix DM and the electroconductive protection circuit15, and seals the display medium3.

The touch display device further comprises an electroconductive trace5, and the electroconductive trace5is disposed outside the first substrate1aand the second substrate2a, and connected to the electroconductive protection circuit15and the extension of the touch electrode. The electroconductive protection circuit15is electrically connected to the touch electrode through the electroconductive trace5disposed outside the first substrate1aand the second substrate2a, and the electroconductive trace5may contact the electroconductive protection circuit15and the touch electrode through the connection cables.

In addition, the second substrate2amay be provided with a filter layer (not shown), and the first substrate1aand the second substrate2ahave elements, such as an alignment film and the like (not shown).

InFIG. 6A, the second substrate2acomprises a substrate21and a plurality of touch electrodes22a, and the touch electrodes22aare formed on an outer surface of the substrate21. The electroconductive protection circuit15is electrically connected to an extension23aof the touch electrode22a.

InFIG. 6B, the touch display device further comprises a touch panel9, and the touch panel9is disposed on an outer surface of a second substrate2a. The touch panel9comprises a substrate91and a touch electrode92, and the touch electrode92is formed on the substrate91of the touch panel9. The electroconductive protection circuit15is electrically connected to an extension93of the touch electrode92.

Under the architectures ofFIGS. 6A and 6B, the row wires12and the column wires13can be individually operated, and the touch electrodes22aand92may also be individually operated. Since the liquid crystal display panel uses the remaining short-circuit as a protective wiring, the step of forming the protective wiring can be omitted. In addition, the conventional substrate having the short-circuit wiring is used as a first substrate1a, and the remaining short-circuit is electrically connected to the touch electrodes22aand92outside the second substrate2a. The electroconductive protection circuit15can still prevent the damage caused by external static electricity on the display panel.

FIGS. 7A to 7Dare schematic side views showing a touch display device of one embodiment of this disclosure. As shown inFIGS. 7A to 7D, the electroconductive protection circuit15is at a distance from the row wire12or the column wire13. The touch display device comprises the first substrate1a, a second substrate2a, a display medium3and a sealing member4. The second substrate2ais disposed opposite to the first substrate1a.

The display medium3is interposed between inner sides of the first substrate1aand the second substrate2a, and the display medium3is, for example, a liquid crystal. The sealing member4is interposed between the inner sides of the first substrate1aand the second substrate2a, located between the pixel matrix DM and the electroconductive protection circuit15, and seals the display medium3.

The touch display device further comprises an electroconductive control assembly7, the electroconductive control assembly7is located outside the first substrate1aand the second substrate2aand connected to the electroconductive protection circuit15and an extension of the touch electrode. The electroconductive protection circuit15is electrically connected to the touch electrode through the electroconductive control element7disposed outside the first substrate1aand the second substrate2a, and the electroconductive control element7may contact the electroconductive protection circuit15and the touch electrode through the connection cables.

In addition, the second substrate2amay be provided with a filter layer (not shown), and the first substrate1aand the second substrate2ahave elements, such as an alignment film and the like (not shown).

InFIGS. 7A and 7B, the second substrate2acomprises a substrate21and a plurality of touch electrodes22a, and the touch electrodes22aare formed on an outer surface of the substrate21. The electroconductive protection circuit15is electrically connected to an extension23aof the touch electrode22a.

InFIGS. 7C and 7D, the touch display device further comprises a touch panel9, and the touch panel9is disposed on an outer surface of a second substrate2a. The touch panel9comprises a substrate91and a touch electrode92, and the touch electrode92is formed on the substrate91of the touch panel9. The electroconductive protection circuit15is electrically connected to an extension93of the touch electrode92.

InFIG. 7A, an electroconductive control assembly7comprises two diodes71and72, which have reversely biased configurations serially connected together, and are electrically connected between the electroconductive protection circuit15and the touch electrode22a. The diodes71and72are located outside the first substrate1aand the second substrate2a, and connected to the electroconductive protection circuit15and the extension221of the touch electrode22a. The electroconductive protection circuit15is electrically connected to the touch electrode22athrough the diodes71and72disposed outside the first substrate1aand the second substrate2a, and the diodes71and72may contact the electroconductive protection circuit15and the touch electrode22athrough the connection cables.

Under general operating conditions, because the diode72is reversely biased to the touch electrode22a, the signal on the touch electrode22ais not transmitted to the electroconductive protection circuit15. Because the diode71is reversely biased to the electroconductive protection circuit15, the small noise on the electroconductive protection circuit15is also not transmitted to the touch electrode22a, so that the touch electrode22acan operate independently.

When the static electricity is generated, the instantaneous voltage will be higher than the reversely biased of the diodes71and72. Therefore, the diodes71and72are turned on, so that the electroconductive protection circuit15is electrically connected to the touch electrode22a. The electroconductive protection circuit15can prevent the damage caused by external static electricity on the pixel of the display panel.

InFIG. 7B, the electroconductive control assembly7comprises a switch73which selectively electrically connects the touch electrode22ato the electroconductive protection circuit15or a touch circuit81. The switch73is located outside the first substrate1aand the second substrate2aand connected to the electroconductive protection circuit15and the extension221of the touch electrode22a. The electroconductive protection circuit15is electrically connected to the touch electrode22athrough the switch73disposed outside the first substrate1aand the second substrate2a, and the switch73may contact the electroconductive protection circuit15and the touch electrode22athrough the connection cables.

A control circuit82controls the switch73to electrically connect the electroconductive protection circuit15or the touch circuit81. Under general operating conditions, the control circuit82controls the switch73, so that the touch electrode22ais electrically connected to the touch circuit81, thereby carrying out the conventional touch function. In the case where the static electricity is generated, the control circuit82controls the switch73, so that the touch electrode22ais electrically connected to the electroconductive protection circuit15, thereby carrying out the electrostatic protection function.

For example, the control circuit82can switch the target electrically connected to the touch electrode22ain a time-sharing manner. For example, the switch73is switched from the touch circuit81to the electroconductive protection circuit15every other period of time. At the same time, the touch circuit81does not perform the touch function to prevent the electrostatic damage on the electroconductive protection circuit15and the touch electrode22a. The switch73is again switched from the electroconductive protection circuit15to the touch circuit81every period of time. At the same time, the touch circuit81and the touch electrode22aperform the touch function. Since the switch73does not allow the touch electrode22ato be electrically connected to the electroconductive protection circuit15, the small noise on the electroconductive protection circuit15is also not transmitted to the touch electrode22a, so that the touch electrode22acan operate independently.

The control circuit82is, for example, a controller in the display panel, and the touch circuit81is, for example, a touch detection circuit or a touch excitation circuit.

As shown inFIG. 7C, since the electroconductive control assembly7ofFIG. 7Cand the electroconductive control element7ofFIG. 7Aare the same or similar, so the relevant circuit property and operation may refer to the relevant description of theFIG. 7A, so detailed descriptions thereof will be omitted.

As shown inFIG. 7D, since the electroconductive control assembly7ofFIG. 7Dand the electroconductive control element7ofFIG. 7Bare the same or similar, so the relevant circuit property and operation may refer to the relevant description of theFIG. 7B, so detailed descriptions thereof will be omitted.

Under the architectures ofFIGS. 7A and 7D, the row wire12and the column wire13can be individually operated. The touch electrode22aand92may also be individually operated. Since the liquid crystal display panel uses the remaining short-circuit as a protective wiring, the step of forming the protective wiring can be omitted. In addition, the conventional substrate having the short-circuit wiring is used as the first substrate1a, and the remaining short-circuit is electrically connected to the touch electrode22a, and92on the second substrate2a. The electroconductive protection circuit15can still prevent the damage caused by external static electricity on the display panel.

The elements of this embodiment may also refer to the descriptions of the elements with the symbols the same as or corresponding thereto in the embodiments ofFIGS. 1A to 5B, so detailed descriptions thereof will be omitted.

In summary, in the touch display device of this disclosure, the electroconductive protection circuit is electrically isolated from the row wires and the column wires, and is electrically connected to the touch electrode. Therefore, the pixel drive element can be protected from having the problem caused by static electricity.

FIG. 8Ais a schematic side view showing a touch display device of one embodiment of this disclosure.FIG. 8Bis a schematic side view showing a touch display device of one embodiment of this disclosure. As shown inFIGS. 2A and 2B, the remaining short-circuit wiring15obtained after cutting is at a distance from the row wire12or the column wire13. The touch display device comprises the first substrate1b, a second substrate2b, a display medium3and a sealing member4. The second substrate2bis disposed opposite to the first substrate1b. A first substrate1bis similar to the first substrate1inFIGS. 1A to 1C, and the first substrate1bmay comprise the assembly the same as or similar to that of the first substrate1, so detailed descriptions thereof will be omitted.

The display medium3is interposed between the inner sides of the first substrate1band the second substrate2b, display medium3is, for example, the liquid crystal. The sealing member4is interposed between the inner sides of the first substrate1band the second substrate2band located between the pixel matrix DM and the remaining short-circuit wiring15obtained after cutting to seal the display medium3.

The second substrate2bcomprises a substrate21and a plurality of touch electrodes22, and the touch electrodes22are formed on the substrate21. The remaining short-circuit wiring15is electrically connected to the touch electrode22.

In addition, the second substrate2bmay be provided with a filter layer (not shown), and the first substrate1band the second substrate2bhave elements, such as an alignment film and the like (not shown).

InFIG. 8A, the touch display device may comprise an electroconductive trace disposed outside the first substrate1band the second substrate2b, and connected to the remaining short-circuit wiring15obtained after cutting and the touch electrode22. The electrical connection between the remaining short-circuit wiring15obtained after cutting and the touch electrode22is made through the electroconductive trace disposed outside the first substrate1band the second substrate2b, and the electroconductive trace may contact the remaining short-circuit wiring15obtained after cutting and the touch electrode22through the connection cable. The electrical connection between the remaining short-circuit wiring15obtained after cutting and the touch electrode22provides the electrostatic protection in the manufacturing process.

Under the architecture ofFIG. 8A, since the liquid crystal display panel utilizes the remaining short-circuit as the protective wiring, the step of forming the protective wiring can be omitted. In addition, by using the conventional substrate having the short-circuit wiring as the first substrate1band electrically connecting the remaining short-circuit to the touch electrode22on the second substrate2b, the remaining short-circuit wiring15obtained after cutting still can prevent the damage caused by external static electricity on the display panel.

Then, as shown inFIG. 8B, the electrical connection between the remaining short-circuit wiring15obtained after cutting and the touch electrode22is removed, and the remaining short-circuit wiring15obtained after cutting is used as an antenna electrically connected to a communication control circuit83. With regard to the remained short-circuit wiring, an antenna pattern may be designed to facilitate the radio transmission. In this manner, the short-circuit wiring15can be effectively utilized.

The elements of this embodiment may also refer to the descriptions of the elements with the symbols the same as or corresponding thereto in the embodiments ofFIGS. 1A to 7D.

In summary, in the touch display device of this disclosure, the remaining short-circuit wiring obtained after cutting is electrically isolated from the row wires and the column wires, and is electrically connected to the touch electrode. Therefore, the pixel drive element can be protected from having the problem caused by static electricity

In addition, in the above-mentioned embodiments, the row wires12, the column wires13, the unit pixel14, the electroconductive protection circuit15, the area16and the area17are disposed on the front side of the first substrate1, and the area16and the area17of the first substrate1may be respectively electrically connected to the row driver and the column driver through flat cables, circuit boards or the like. The row driver and the column driver may also be disposed on the backside of the first substrate1, and such the configuration is beneficial to the display device with the narrow border.

In addition to the row driver and the column driver disposed on the backside of the first substrate1, in order to benefit the display device with the narrow border, a portion of the electroconductive protection circuit15may further be removed to save the space occupied by the portion of the electroconductive protection circuit15on the first substrate1. For example, as shown inFIG. 9A, the electroconductive protection circuit15is only disposed on one end of the row wire12, and is not disposed on two ends of the column wire13. As shown inFIG. 9B, the electroconductive protection circuit15is only disposed on one end of the column wire13, and is not disposed on two ends of the row wire12. The modifications of the electroconductive protection circuit15relating toFIGS. 9A and 9Bmay also be applied to the above-mentioned embodiments. The way of eliminating a portion of the electroconductive protection circuit15may be performed by cutting off the portion of the short-circuit wiring, which is not to be kept, when the short-circuit wiring is being cut, and the remaining short-circuit wiring serves as the electroconductive protection circuit15.

In addition, in the above-mentioned embodiments, the electroconductive protection circuit15may be located on the lateral side of the substrate. For example, as shown inFIG. 10, the row wires12, the column wires13, the unit pixel14, the area16and the area17are located on the front side of the first substrate1, the electroconductive protection circuit15is located on the lateral side of the substrate11, and the electroconductive protection circuit15comprises two sections15A and15B respectively located on different lateral sides111and112of the substrate11. The other two lateral sides of the substrate11may have no electroconductive protection circuit15, and the lateral sides111and112are also not fully filled with the electroconductive protection circuit15.

The sections15A and15B are connected to each other. The electroconductive protection circuit15is, for example, a conductive adhesive tape adhered to the lateral sides111and112, or an L-shaped metal plate boxing the lateral sides111and112of the substrate is used.

In addition, the area16and the area17of the first substrate1may be respectively electrically connected to the row driver and the column driver through flat cables, circuit boards or the like. The row driver and the column driver may also be disposed on the backside of the first substrate1, and such the configuration is beneficial to the display device with the narrow border.

The above contents with the specific embodiments of the present invention is further made to the detailed description, and specific embodiments of the present invention should not be considered limited to these descriptions. Those of ordinary skill in the art for the present invention, without departing from the spirit of the present invention, can make various simple deduction or replacement, and should be deemed to belong to the scope of the present invention.