CN101751182A - Wiring method used for circuit board in touch panel - Google Patents
Wiring method used for circuit board in touch panel Download PDFInfo
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- CN101751182A CN101751182A CN201010114406A CN201010114406A CN101751182A CN 101751182 A CN101751182 A CN 101751182A CN 201010114406 A CN201010114406 A CN 201010114406A CN 201010114406 A CN201010114406 A CN 201010114406A CN 101751182 A CN101751182 A CN 101751182A
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Abstract
The invention provides a wiring method used for a circuit board in a touch panel. The circuit board at least comprises a flexible printed circuit board and a panel driving chip. When a touch function fails, a pre-repairing wire is arranged between a preinstalled pin and the supply voltage of FPC; then the preinstalled pin and grounding voltage are electrically insulated, and the pre-repairing wire is welded so as to electrically connect the preinstalled pin and the supply voltage. By adopting the wiring method, laser welding is carried out on the pin by the installed pre-repairing wire after the laser cutting is carried out on the pin so as to enable the preinstalled pin to be electrically connected with the supply voltage. Therefore, the touch panel without the touch function can also be used as a normal crystal display panel for shipment, thereby reducing the manufacture cost. Moreover, due to the fact that circuits relevant to the touch function are cut off, the power consumption of the whole panel can be reduced and the use ratio of the product is increased.
Description
Technical field
The present invention relates to contact panel, relate in particular to the circuit board wiring method of contact panel.
Background technology
Current, from the design angle of touch-control sensing, contact panel can be divided into traditional external hanging type (on-cell) contact panel and novel embedded (in-cell) contact panel two big classes.Be different from the external hanging type contact panel, the embedded touch panel generally is embedded in inductive component on the array base palte of contact panel, so that touch control detection is integrated in the manufacturing process of panel, and need not to add one deck touch-control glass substrate again.
For voltage induced type (the high electronegative potential by relevant pin judges whether touched) contact panel, its circuit board generally comprises flexible print circuit board (FPC, Flexible Printed Circuit) and panel driving chip (Driving IC for Panel), for example, default pin by the panel driving chip electrically connects the ground voltage of FPC, thereby starts the touch controllable function of contact panel.Therefore, when carrying out the hardware uniting and adjustment, have only FPC and panel driving chip are assembled according to predetermined circuit design drawing, whether the touch controllable function that could confirm panel operate as normal.If, also can't satisfy specification requirement, because of the contact panel of touch controllable function fault will be scrapped processing through repeated detection.
In addition, at the touch controllable function fault, no matter be to utilize when the product export by the manufacturer of panel driving chip to solidify the code forbidding, still for the client reserves the control pin, all be not suitable for technological process when the front panel production line.How above-mentioned contact panel being reused, also reduce manufacturing cost when reducing the panel power consumption, is a right important topic of research staff's demand side.
Summary of the invention
At the above-mentioned defective that contact panel in the prior art is occurred, the invention provides a kind of wiring method that is used for the contact panel circuit board when touch control detection can't satisfy specification requirement.The current potential of this wiring method by the switching controls pin comes the circuit that is associated with touch controllable function on the breaking circuit plate, so that contact panel is carried out product turnout as common display panels, not only can reduce the overall power of contact panel, can also save manufacturing cost.
According to an aspect of the present invention, provide a kind of wiring method that is used for the contact panel circuit board.This circuit board comprises a flexible print circuit board and a panel chip for driving at least, and the ground voltage of a default pin electric connection FPC of panel driving chip, to enable the touch controllable function of contact panel.This wiring method comprises: when the touch controllable function of contact panel lost efficacy, between the supply voltage of default pin and FPC, one pre-patch cord is set, the ground voltage that to preset pin and FPC then is electrically insulated, and the pre-patch cord of welding is to electrically connect the supply voltage of default pin and FPC.
Wherein, by the be electrically insulated ground voltage of default pin and FPC of radium-shine cutting (Laser Cutting) method.
Wherein, electrically connect the supply voltage of default pin and FPC by radium-shine welding (Laser Welding) method.Preferably, when default pin is noble potential, turn-off the circuit that is associated with touch controllable function on the contact panel, to reduce power consumption.
Wherein, contact panel is embedded touch panel (In-Cell Touch Panel).Preferably, this embedded touch panel is applicable to the electronic equipment with LCD.
Wherein, FPC has identical supply voltage and ground voltage with the panel driving chip.In addition, the panel driving chip can comprise: a power module is used to provide supply voltage and ground voltage; One clock signal output module is used to provide clock pulse signal; And a touch-control module, be used to enable or forbid the touch controllable function of contact panel.
Adopt the wiring method that is used for the contact panel circuit board among the present invention,, carry out radium-shine welding by the pre-patch cord that has been provided with again, so that select pin to electrically connect supply voltage touch-control with after being grounded touch-control that voltage drags down and selecting pin to carry out radium-shine cutting.Therefore, the touch controllable function that was in enabled state originally switches to failure state, and the contact panel of no touch-control signal also just can be used as normal display panels shipment, thereby reduces manufacturing cost.In addition, because the circuit that is associated of touch controllable function turn-offs, can reduce the power consumption of whole front panel and promote the utilization factor of product.
Description of drawings
The reader will become apparent various aspects of the present invention after the reference accompanying drawing has been read the specific embodiment of the present invention.Wherein,
Fig. 1 illustrates according to the schematic block diagram that is connected between FPC in the contact panel circuit board of the present invention and the panel driving chip; And
Fig. 2 illustrates the wires design synoptic diagram of contact panel circuit board after pre-patch cord is set as shown in Figure 1.
Embodiment
With reference to the accompanying drawings, the specific embodiment of the present invention is described in detail.
At voltage induced type contact panel, one row photoresistance sept (PS is set on colored filter substrate (ColorFilter Substrate) usually, Photo Spacer), this row photoresistance sept is towards array base palte (Array Substrate) direction projection.When the user pushed touch-screen, the photoresistance sept electrically contacted with electrode on the array base palte, and the sensor by this electrode other end converts to and press signal, thereby the relevant position of determining panel is pressed.In a kind of embedded touch panel, the photoresistance sept that is positioned at the colored filter substrate side is divided three classes: one is the key light resistance, is used to support the gap between the two substrates; It two is auxiliary photoresistance, is used to increase permanance and reliability at interval; With and three serve as the induction photoresistance, be used to respond the touch-control action of contact panel and in time transmit testing result.In normal operation, when pressing the optional position of this panel, the induction photoresistance corresponding with this position can both detect the behavior of pressing and convert to and press signal and be sent to processor.Those of ordinary skill in the art should be appreciated that the power consumption of whole contact panel this moment mainly is made of two parts, that is, and and the power consumption when the driving panel carries out the image demonstration, and the power consumption that circuit produced that is associated with touch controllable function.Obviously, when the touch controllable function in the contact panel breaks down, user's processor when pressing screen will can not made any response, this also be before product turnout, must carry out detect operation together.For detecting unsuccessful situation, this contact panel may be scrapped processing usually, therefore tend to cause the decline of product utilization rate and the increase of manufacturing cost.
In order to address this problem effectively, the invention provides a kind of new technical conceive, by the wiring of contact panel circuit board is improved dexterously a little, just the contact panel of desiring to scrap processing can be utilized again.Those of ordinary skill in the art should be appreciated that the contact panel such as liquid crystal display, mainly possesses two big functions---the first, and the image that needs are shown is presented on the panel with relatively low power consumption; The second, panel also has touch controllable function, and such interactive mode is more convenient with respect to the keyboard-type interface, and experience sense is stronger.In other words, the basic function of contact panel be as output device with display image, its enhancement function is also to have the testing circuit of pressing and corresponding driving circuit in this panel.Based on above-mentioned consideration, be intended to study the contact panel that touch controllable function was lost efficacy and become important through the problem that certain track remodelling is transformed into common display panel again.
In more detail, Fig. 1 illustrates according to the schematic block diagram that is connected between FPC in the contact panel circuit board of the present invention and the panel driving chip.With reference to Fig. 1, circuit board comprises flexible print circuit board (FPC) 10 and panel driving chip 12 at least, those of ordinary skill in the art is to be understood that, circuit board among Fig. 1 just schematically illustrates and closely-related electronic component of the present invention and cloth line object, but this circuit board has more than and is confined to only comprise FPC and panel driving chip, and it can also comprise other circuit.In addition, panel driving chip 12 is by the function branch, also can divide power module 120, clock signal output module 122 and touch-control module 124 into, wherein power module 120 is used to provide the supply voltage of circuit board and ground voltage (promptly, the supply voltage of FPC and panel driving chip and supply voltage), clock signal output module 122 is used to provide clock pulse signal, and touch-control module 124 is used to enable or forbid the touch controllable function of contact panel.For example, can specify touch controllable function in the touch-control module 124 to select pin to enable or forbid this touch controllable function.
And, between the supply voltage connecting line of circuit board and touch controllable function selection wire (connecting line of selecting pin to draw by touch controllable function), pre-patch cord 14 is set also.One end of pre-patch cord 14 is connected in the supply voltage connecting line, and the other end of pre-patch cord 14 is connected in the touch controllable function selection wire.Here, might as well suppose that the touch controllable function selection wire electrically connects with the ground voltage connecting line of circuit board under default setting, and when the voltage potential on the touch controllable function selection wire is low level, the loading touch controllable function; When the voltage potential on the touch controllable function selection wire is high level, forbid touch controllable function.So, when the touch controllable function fault appears in contact panel, can use earlier such as the ground voltage of Laser Cutting method and be electrically insulated touch controllable function selection wire and circuit board, use the LaserWelding method to come the pre-patch cord 14 of welding then, so that electrically connect the supply voltage of touch controllable function selection wire and circuit board.At this moment, the voltage potential of touch controllable function selection wire is a high level, thereby then the be under an embargo circuit that is associated with touch-control of touch controllable function just can not produce extra power consumption yet.In one embodiment of this invention, an end of the pre-patch cord 14 of welding in advance to be electrically connecting the supply voltage connecting line, thereby and when the touch controllable function fault occurring again the other end of the pre-patch cord 14 of welding make the touch controllable function selection wire present high voltage potential.In another embodiment of the present invention, also an end of the pre-patch cord 14 of welding in advance to be electrically connecting the touch controllable function selection wire, thereby and when the touch controllable function fault occurring again the other end of the pre-patch cord 14 of welding electrically connect touch controllable function selection wire and supply voltage connecting line by pre-patch cord.
From the above mentioned, by the welding of pre-patch cord 14 being handled with the voltage potential on the touch controllable function selection wire when a kind of level state switches to another kind of level state, the touch controllable function control on the contact panel allows sign also to switch to illegal state from enabled state.Therefore, when the touch controllable function fault, compatibility has the contact panel of touch-control effect to can be used as common display panel use under the same hardware configuration condition, has reduced the manufacturing cost of producer, and the product utilization rate is provided.
Fig. 2 illustrates the wires design synoptic diagram of contact panel circuit board after pre-patch cord is set as shown in Figure 1.For describe in more detail circuit board shown in Figure 1 in welding the circuit diagram behind the pre-patch cord connect, Fig. 2 shows two the specific pins 200 and 202 on the panel driving chip 12, wherein pin 200 is a pad or via hole of circuit board supply voltage, and pin 202 is a pad or via hole of touch controllable function selection wire on the circuit board.Between FPC 10 and panel driving chip 12 across a pre-patch cord 14, wherein an end of pre-patch cord 14 is by the supply voltage connecting line of Laser Welding mode welding with the electric connection circuit board, and the other end suspension of pre-patch cord 14 is overlapped in the top of touch controllable function selection wire and is electrically insulated with it.When the touch controllable function of contact panel breaks down, at first use such as Laser Cutting mode the touch controllable function selection wire is connected with the ground voltage disconnection, pass through the other end of the pre-patch cord 14 of Laser Welding mode welding then, so that the touch controllable function selection wire is electrically connected to the supply voltage connecting line by pre-patch cord 14.So, the touch controllable function on the plate is under an embargo, and the circuit that is associated with touch-control just can not produce power consumption yet.
Adopt the wiring method that is used for the contact panel circuit board among the present invention,, carry out radium-shine welding by the pre-patch cord that has been provided with again, so that select pin to electrically connect supply voltage touch-control with after being grounded touch-control that voltage drags down and selecting pin to carry out radium-shine cutting.Therefore, the touch controllable function that was in enabled state originally switches to illegal state, and the contact panel of no touch-control signal also just can be used as normal display panels shipment, thereby reduces manufacturing cost.In addition, because the circuit that is associated of touch controllable function turn-offs, can reduce the power consumption of whole front panel and promote the utilization factor of product.
Above, describe the specific embodiment of the present invention with reference to the accompanying drawings.But those skilled in the art can understand, and under situation without departing from the spirit and scope of the present invention, can also do various changes and replacement to the specific embodiment of the present invention.These changes and replace all drop in claims of the present invention institute restricted portion.
Claims (8)
1. wiring method that is used for the contact panel circuit board, described circuit board comprises a flexible print circuit board (FPC at least, Flexible Printed Circuit) and a panel chip for driving, one default pin of described panel driving chip is electrically connected to the ground voltage of described FPC so that the touch controllable function of the described contact panel of energy, it is characterized in that
When the touch controllable function of described contact panel lost efficacy, one pre-patch cord is set between the supply voltage of described default pin and described FPC, ground voltage with described default pin and described FPC is electrically insulated then, and the described pre-patch cord of welding is to electrically connect the supply voltage of described default pin and described FPC.
2. wiring method as claimed in claim 1 is characterized in that, by the be electrically insulated ground voltage of described default pin and described FPC of radium-shine cutting (Laser Cutting) method.
3. wiring method as claimed in claim 1 is characterized in that, electrically connects the supply voltage of described default pin and described FPC by radium-shine welding (Laser Welding) method.
4. wiring method as claimed in claim 3 is characterized in that, when described default pin is noble potential, turn-offs the circuit that is associated with touch controllable function on the described contact panel, to reduce power consumption.
5. wiring method as claimed in claim 1 is characterized in that, described contact panel is embedded touch panel (In-Cell Touch Panel).
6. wiring method as claimed in claim 5 is characterized in that, described embedded touch panel is applicable to the electronic equipment with LCD.
7. wiring method as claimed in claim 1 is characterized in that, described FPC has identical supply voltage and ground voltage with described panel driving chip.
8. wiring method as claimed in claim 7 is characterized in that, described panel driving chip comprises: a power module is used to provide described supply voltage and ground voltage; One clock signal output module is used to provide clock pulse signal; And a touch-control module, be used to enable or forbid the touch controllable function of described contact panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010114406A CN101751182A (en) | 2010-02-09 | 2010-02-09 | Wiring method used for circuit board in touch panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010114406A CN101751182A (en) | 2010-02-09 | 2010-02-09 | Wiring method used for circuit board in touch panel |
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| Publication Number | Publication Date |
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| CN101751182A true CN101751182A (en) | 2010-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010114406A Pending CN101751182A (en) | 2010-02-09 | 2010-02-09 | Wiring method used for circuit board in touch panel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331870A (en) * | 2010-07-12 | 2012-01-25 | 东莞万士达液晶显示器有限公司 | Touch panel and touch display unit |
| CN104461132A (en) * | 2014-11-20 | 2015-03-25 | 深圳市华星光电技术有限公司 | Built-in touch control assembly |
| CN105141301A (en) * | 2015-08-31 | 2015-12-09 | 昆山龙腾光电有限公司 | Keying circuit and display device comprising keying circuit |
-
2010
- 2010-02-09 CN CN201010114406A patent/CN101751182A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331870A (en) * | 2010-07-12 | 2012-01-25 | 东莞万士达液晶显示器有限公司 | Touch panel and touch display unit |
| CN102331870B (en) * | 2010-07-12 | 2014-10-15 | 东莞万士达液晶显示器有限公司 | Touch panel and touch display unit |
| CN104461132A (en) * | 2014-11-20 | 2015-03-25 | 深圳市华星光电技术有限公司 | Built-in touch control assembly |
| CN105141301A (en) * | 2015-08-31 | 2015-12-09 | 昆山龙腾光电有限公司 | Keying circuit and display device comprising keying circuit |
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Application publication date: 20100623 |