KR20090001311A - Driver integrated circuit and plat panel display including the same - Google Patents

Abstract

A driver integrated circuit and plat panel display including the same is provided to reduce the number of the wiring of a printed circuit board by reducing the number of an integrated circuit. In a driver integrated circuit and plat panel display, a driver circuit supplies a voltage corresponding to image data to the liquid crystal panel in response to image control signals, and performs the on/off control of the thin film transistors arranged in response to image control signals on the liquid crystal panel. The touch signal processing circuit(300) receives an analog touch signal(TSIGNAL) from the touch screen sensors of the flat display panel. The touch signal processing circuit converts analog touch signals into the digital touch data(TDATA) in response to the touch control signal(TCONTROL). Analog touch signals are inputted to the touch signal processing circuit through signal wires, and the touch signal processing circuit converts received analog touch signals into digital touch data.

Description

Driver integrated circuit and plat panel display including the same}

1 is a block diagram illustrating a driver integrated circuit according to an exemplary embodiment of the present invention.

FIG. 2 is a block diagram illustrating a touch signal processing circuit included in the driver integrated circuit of FIG. 1.

3 is a block diagram illustrating a level detector included in the touch signal processing circuit of FIG. 2.

4 is a circuit diagram illustrating a parallel-to-serial converter included in the touch signal processing circuit of FIG. 2.

5 is a block diagram illustrating a driver integrated circuit according to an exemplary embodiment of the present invention.

6 is a timing diagram illustrating control signals of a driver integrated circuit according to an exemplary embodiment of the present invention.

7 is a block diagram illustrating a flat panel display device according to an exemplary embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100, 100a, 110b, 100c, 100d, 100e: driver integrated circuit

300, 300a, 300b: touch signal processing circuit

310: level detector 311: discharge circuit

313: analog-to-digital converter 330: parallel-to-serial converter

331, 332, 333, 334, 335: flip-flop circuit

341, 342, 343, 344, 345: multiplexer

350: buffer 500, 500a: driver circuit

700: flat panel display panel

The present invention relates to a display device, and more particularly, to a driver integrated circuit incorporating a touch signal processing function and a flat panel display device including the same.

Recently, a plat panel display including a touch screen has been developed. When the user's hand or touch pen touches the screen of the flat panel display, the touch screen detects a change in output of the touch screen sensor and provides the touch screen to the flat panel display. The flat panel display determines contact information such as whether a contact is made and a touch position based on the detected change in the output of the touch screen sensor, and transmits the contact information to the external device, and the external device transmits an image signal based on the touch information to the flat panel display. Such a touch screen may be manufactured separately and attached to a display panel. However, in the flat panel display device including the touch screen attached to the display panel, the transmittance is reduced by the touch screen, thereby degrading the image quality.

Accordingly, researches on display panels incorporating touch screen sensors have been conducted. For example, a technology for forming a touch screen sensor made of a thin film transistor in a liquid crystal display (LCD) inside a pixel displaying an image is being developed. The analog touch signal, which is an output signal of the touch screen sensor, is converted into a digital signal for processing by an external device and transmitted. To this end, a liquid crystal display including a display panel having a conventional touch screen sensor has a touch signal processing circuit, and the touch signal processing circuit is manufactured as a separate chip. As touch signal processing circuits are manufactured on separate chips, the cost of manufacturing separate integrated circuits (ICs) increases, and flexible printed circuit (FPC) substrates or printed circuit boards, Manufacturing cost and wiring cost of PCB) increases.

In order to solve the above problems, the present invention provides a driver integrated circuit incorporating a touch signal processing function that can reduce the integrated circuit manufacturing cost, the wiring cost of the flexible printed circuit board, and the wiring cost of the printed circuit board. It is intended for work.

Another object of the present invention is to provide a flat panel display device including the driver integrated circuit.

In order to achieve the above object, a driver integrated circuit according to an embodiment of the present invention includes a driver circuit and a touch signal processing circuit.

The driver circuit drives a flat display panel. The touch signal processing circuit receives analog touch signals from touch screen sensors embedded in the flat panel display panel, converts the analog touch signals into digital touch data, and sequentially outputs the analog touch signals. The driver circuit and the touch signal processing circuit are integrated in one chip.

The touch signal processing circuit receives and stores the digital touch signals and the level detector for receiving and converting the analog touch signals from the touch screen sensors into digital touch signals, and converting the stored digital touch signals into the digital touch data. It may include a parallel-to-serial converter that converts and sequentially outputs through one signal line. The level detector may include a discharge circuit for discharging charges accumulated in the touch screen sensors in response to a reset signal and an analog-to-digital converter for converting the analog touch signals into the digital touch signals in response to a load signal. have.

The parallel-to-serial converter may include a plurality of multiplexers for receiving the load signal as a selection signal and a plurality of flip-flop circuits for outputting the digital touch data through the one signal line. Receive each of the digital touch signals at a first input terminal of each of the multiplexers, an output terminal of each of the multiplexers is connected to an input terminal of each of the flip-flop circuits, each of the multiplexers correspondingly Forming one stage with each of the flip-flop circuits, and output terminals of the flip-flop circuits are each connected to a second input terminal of the multiplexer of a next stage, and the multiplexers are connected to the load signal. Outputs the digital touch signals when is activated, outputs a signal received at the second input terminal when the load signal is inactive, and the flip-flop circuits output the digital when the load signal is activated. Store touch signals and responsive to the shift clock signal when the load signal is inactive; By the shift of the touch digital signal it can be output sequentially. The parallel-to-serial converter outputs a first reference voltage when the load signal of the multiplexers is in an active state, and the flip-flop circuit of the output terminal of the flip-flop circuits is configured to output the load signal. The first reference voltage may be stored in an active state, and the digital touch signals stored in the flip-flop circuits of the preceding stage may be sequentially output in response to a shift clock signal when the load signal is in an inactive state.

The touch signal processing circuit may further include a buffer for increasing the output level of the digital touch data by receiving the digital touch data from the parallel-to-serial converter.

The driver integrated circuit according to an embodiment of the present invention may include a driver circuit and a plurality of touch signal processing circuits.

The driver circuit receives the image data and the image control signals to drive the flat panel display panel. The plurality of touch signal processing circuits receive analog touch signals from touch screen sensors embedded in the flat panel display panel, convert the analog touch signals into digital touch data, and convert the digital touch data into a single signal line. Output sequentially through. The driver circuit and the plurality of touch signal processing circuits are integrated on one chip.

A flat panel display device according to an exemplary embodiment of the present invention includes a flat panel display panel, a first direction driver integrated circuit, and a second direction driver integrated circuit.

The flat panel display includes touch screen sensors. The first direction driver integrated circuit receives first direction analog touch signals for the first direction from the touch screen sensors, converts the first direction digital touch data into first direction digital touch data, and sequentially outputs the signal through one signal line. It includes a signal processing circuit and a first direction driver circuit for driving the flat panel display panel, it is implemented as a single chip. The second direction driver integrated circuit receives second direction analog touch signals for the second direction from the touch screen sensors, converts the second direction digital touch data into second direction digital touch data, and sequentially outputs the signal through one signal line. It includes a signal processing circuit and a second direction driver circuit for driving the flat panel display panel, it is implemented as a single chip. The first direction driver integrated circuit may be a source driver integrated circuit, and the second direction driver integrated circuit may be a gate driver integrated circuit.

A flat panel display device according to an exemplary embodiment of the present invention includes a flat panel display panel, a plurality of first direction driver integrated circuits, and a plurality of second direction driver integrated circuits.

The flat panel display includes touch screen sensors. The plurality of first direction driver integrated circuits receive first direction analog touch signals for the first direction from the touch screen sensors, convert the first direction analog touch signals into first direction digital touch data, and sequentially output each of them through one signal line. Each of the first direction touch signal processing circuits and the first direction driver circuits for driving the flat panel display panel is implemented as a single chip. The plurality of second direction driver integrated circuits receive second direction analog touch signals in a second direction from the touch screen sensors, convert the second direction analog touch signals into second direction digital touch data, and sequentially output each through one signal line. And second direction touch signal processing circuits and second direction driver circuits for driving the flat panel display panel, each of which is implemented as a single chip. The first direction driver integrated circuits may be source driver integrated circuits, and the second direction driver integrated circuits may be gate driver integrated circuits.

Therefore, the integrated circuit manufacturing cost, the wiring cost of the flexible printed circuit board, and the wiring cost of the printed circuit board can be reduced.

With respect to the embodiments of the present invention disclosed in the text, specific structural to functional descriptions are merely illustrated for the purpose of describing embodiments of the present invention, embodiments of the present invention may be implemented in various forms and It should not be construed as limited to the embodiments described in.

As the inventive concept allows for various changes and numerous modifications, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms may be used for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between. Other expressions describing the relationship between components, such as "between" and "immediately between," or "neighboring to," and "directly neighboring to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "having" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof that is described, and that one or more other features or numbers are present. It should be understood that it does not exclude in advance the possibility of the presence or addition of steps, actions, components, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. .

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention. The same reference numerals are used for the same elements in the drawings, and duplicate descriptions of the same elements are omitted.

1 is a block diagram illustrating a driver integrated circuit according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the driver integrated circuit 100 may include a touch signal processing circuit 300 and a driver circuit 500.

The driver circuit 500 receives the image data VDATA and the image control signals VCONTROL to output the driving signals DRIVE. The image control signals VCONTROL may be a clock signal, a horizontal synchronization signal, a vertical synchronization signal, a data enable signal, a gamma voltage, or the like. The flat display panel is driven in response to the driving signals DRIVE. In some embodiments, the flat panel display panel may be a liquid crystal display panel, an organic light emitting display panel, a plasma display panel, or the like. The driver circuit 500 may be a driver circuit in a vertical direction or a driver circuit in a horizontal direction. For example, the driver circuit 500 may be a source driver for supplying a voltage corresponding to the image data VDATA to the liquid crystal panel in response to the image control signals VCONTROL to control the arrangement of the liquid crystal molecules. In addition, the driver circuit 500 may be a gate driver that performs on / off control of the thin film transistors arranged on the liquid crystal panel in response to the image control signals VCONTROL.

The touch signal processing circuit 300 receives analog touch signals TSIGNAL from touch screen sensors embedded in the flat panel display panel. When the driver circuit 500 is a vertical driver circuit (for example, a source driver), the analog touch signals TSIGNAL may provide a vertical component at a position where a user's hand or a touch pen is in contact with the flat panel display panel. And a signal indicating a horizontal component at a position where a user's hand or a touch pen is in contact with the flat panel display panel when the driver circuit 500 is a horizontal driver circuit (for example, a gate driver). Can be entered. The touch signal processing circuit 300 sequentially converts the analog touch signals TSIGNAL into digital touch data TDATA in response to the touch control signals TCONTROL. The analog touch signals TSIGNAL are input to the touch signal processing circuit 300 through the same number of signal lines as the number of touch screen sensor lines to which the touch screen sensors are connected, and the touch signal processing circuit 300 receives the received analog touch. The signals TSIGNAL are converted into digital touch data TDATA and output. The digital touch data TDATA may be serially output through data corresponding to analog touch signals TSIGNAL through one signal line.

The driver integrated circuit 100 is manufactured as a single chip including the touch signal processing circuit 300 and the driver circuit 500. Therefore, since the touch signal processing circuit 300 does not need to be manufactured as a separate chip, an integrated circuit manufacturing cost is reduced, and a wiring cost for wiring chips to a printed circuit board is also reduced.

FIG. 2 is a block diagram illustrating a touch signal processing circuit included in the driver integrated circuit of FIG. 1.

Referring to FIG. 2, the touch signal processing circuit 300 includes a level detector 310 and a parallel-serial converter 330. In some embodiments, the touch signal processing circuit 300 may further include a buffer 350.

The level detector 310 receives analog touch signals TSIGNAL which are analog signals from the touch screen sensors. The level detector 310 converts the analog touch signals TSIGNAL into digital touch signals PDATA that are digital signals in response to the reference voltage VREF and the load signal LOAD. The reference voltage VREF may be a reference voltage when the analog signal is converted into a digital signal. The load signal LOAD is a signal for controlling the operation of the level detector 310 and the parallel-serial converter 330. The load signal LOAD input to the level detector 310 and the parallel-serial converter 330 is the same. May be a signal. The number of bits of the digital touch signals PDATA may be selected according to an embodiment. According to an embodiment, after the analog touch signals TSIGNAL are converted into digital touch signals PDATA and transmitted to the parallel-to-serial converter 330, the level detector 310 responds to a reset signal RESET. The charges accumulated in the touch screen sensors may be discharged to initialize the touch screen sensors to a state before contact.

The parallel-to-serial converter 330 receives the digital touch signals PDATA from the level detector 310. The digital touch signals PDATA are input in parallel from the same number of signal lines as the number of touch screen sensor lines. The parallel-to-serial converter 330 stores the digital touch signals PDATA in response to the load signal LOAD. The parallel-to-serial converter 330 converts the stored digital touch signals PDATA into digital touch data TDATA by sequentially shifting the stored digital touch signals PDATA in response to the shift clock signal SHIFT_CLK. The digital touch data TDATA is a signal in which digital touch signals PDATA input in parallel are converted in series. The parallel-to-serial converter 330 outputs digital touch data TDATA through one signal line.

The buffer 350 receives the digital touch data TDATA from the parallel-to-serial converter. In some embodiments, the buffer 350 may be omitted. The buffer 350 may be an output driving circuit that maintains a constant output level of the digital touch data TDATA. In one embodiment, buffer 350 may comprise a CMOS inverter.

3 is a block diagram illustrating a level detector included in the touch signal processing circuit of FIG. 2.

Referring to FIG. 3, the level detector 310 includes a discharge circuit 311 and an analog to digital converter 313.

The discharge circuit 311 receives the reset signal RESET as a control signal. The discharge circuit 311 discharges charges accumulated in the touch screen sensors when the reset signal RESET is in an active state. The touch screen sensors are charged with charges when a user's hand, a touch pen, or the like comes into contact with the flat panel display panel. When charges are charged to the touch screen sensors, the voltage of the touch screen sensor lines to which the touch screen sensors charged with charges are connected increases. The elevated voltage is input to the touch signal processing circuit 300 of FIG. 1 as analog touch signals TSIGNAL, and the touch signal processing circuit 300 of FIG. 1 converts the elevated voltage into digital touch data TDATA. It converts it and delivers it to an external digital signal processing device. After contact information such as a user's hand or a touch pen is transferred to the external digital signal processing apparatus, the charges charged in the touch screen sensors must be discharged. The discharge circuit 311 discharges the electric charges charged in the touch screen sensors in response to a reset signal RESET. The period during which the reset signal RESET is in an active state may be selected according to an embodiment.

The analog-digital converter 313 receives analog touch signals TSIGNAL which are analog signals from the touch screen sensors. The analog-digital converter 313 converts the analog touch signals TSIGNAL into digital touch signals PDATA that are digital signals when the load signal LOAD is in an active state. The number of bits of the digital touch signals PDATA may be selected according to an embodiment. For example, when analog touch signals TSIGNAL are converted into 1-bit digital touch signals PDATA, the information on the contact received from the touch screen sensors is transmitted to one clock and includes information on whether the contact is present. In addition, when converted into 2-bit digital touch signals PDATA, the information on the contact received from the touch screen sensors may be transmitted to the 2 clocks and may include information on the 4 levels of contact strength.

4 is a circuit diagram illustrating a parallel-to-serial converter included in the touch signal processing circuit of FIG. 2.

Referring to FIG. 4, the parallel-to-serial converter 330 includes a plurality of flip-flop circuits 331, 332, 333, 334, and 335 and a plurality of multiplexers 341, 342, 343, 344, and 345. ).

The output terminal of each of the multiplexers 341, 342, 343, 344, 345 is connected to an input terminal of each of the flip-flop circuits 331, 332, 333, 334, 335, and the multiplexers 341, 342, 343, 344 and 345 respectively form one stage with the respective respective flip-flop circuits 331, 332, 333, 334, 335. For example, the first flip-flop circuit 331 and the first multiplexer 341 form an output stage, and the second flip-flop circuit 332 and the second multiplexer 342 form one stage. The third flip-flop circuit 333 and the third multiplexer 343 form one stage, the fourth flip-flop circuit 334 and the fourth multiplexer 344 form one stage, The fifth flip-flop circuit 335 and the fifth multiplexer 345 form one stage. The multiplexers 341, 342, 343, 344, and 345 receive the load signal LOAD as a selection signal, and at each first input terminal, the first reference voltage V1 and the digital touch signals P1, P2. , PN-1, PN, respectively, and receive output signals of the flip-flop circuits 331, 332, 333, 334, and 335 at respective second input terminals. The multiplexers 341, 342, 343, 344, and 345 correspond to the first reference voltage V1 and the digital touch signals P1, P2, PN-1, and PN when the load signal LOAD is activated. Outputs to the flip-flop circuits 331, 332, 333, 334, and 335, and when the load signal LOAD becomes inactive, the signal received from the second input terminal corresponds to the flip-flop circuits 331. 332, 333, 334, and 335). The flip-flop circuits store the first reference voltage V1 and the digital touch signals P1, P2, PN-1, and PN when the load signal LOAD is activated, and when the load signal is inactivated. The shifted first reference voltage V1 and the digital touch signals P1, P2, PN-1, and PN are sequentially output through one signal line. Here, the first reference voltage V1 and the digital touch signals P1, P2, PN-1, and PN sequentially output become digital touch data TDATA. According to an embodiment, the flip-flop circuits 331, 332, 333, 334, and 335 may operate at a rising edge of the shift clock signal SHIFT_CLK. The flip-flop circuits 331, 332, 333, 334, 335 are sequentially connected so that the flip-flop circuits 331, 332, 333, 334, 335 at the rising edge of the shift clock signal SHIFT_CLK. ) Data stored in each is sequentially output.

Looking at the operation of the multiplexers 341, 342, 343, 344, 345 and flip-flop circuits 331, 332, 333, 334, 335, when the load signal LOAD is in an active state, the first multiplexer 341 outputs a first reference voltage V1, a second multiplexer 342 outputs a first digital touch signal P1, and a third multiplexer 343 outputs a second digital touch signal P2. The fourth multiplexer 344 outputs the N-th digital touch signal PN-1, and the fifth multiplexer 345 outputs the N-th digital touch signal PN. Here, N may be one or more natural numbers. For example, when the driver circuit 500 of FIG. 1 is a source driver having signal lines that output 642 drive signals DRIVE, the touch signal processing circuit 300 of FIG. 1 may perform analog touch through 214 signal lines. May receive signals TSIGNAL and N may be 214. In this case, the flat panel display panel includes three dots, that is, one touch screen sensor corresponding to one pixel. The first to Nth digital touch signals P1, P2, PN-1, and PN represent respective signals of the digital touch signals PDATA of FIG. 3. The first reference voltage V1 and the first to Nth digital touch signals P1, P2, PN-1, and PN output from the multiplexers 341, 342, 343, 344, and 345 may have a load signal LOAD. It is input to the first through fifth flip-flop circuits 331, 332, 333, 334, 335, respectively, when in an active state. Accordingly, when the load signal LOAD is in an active state, each of the flip-flop circuits 331, 332, 333, 334, and 335 has a first reference voltage V1 and a first through N-th digital touch signal P1, P2, PN-1, and PN, that is, the first reference voltage V1 and the digital touch signals PDATA of FIG. 3 are stored.

Shift clock signal after first reference voltage V1 and first to Nth digital touch signals P1, P2, PN-1, PN are stored in flip-flop circuits 331, 332, 333, 334, 335 At the first rising edge of (SHIFT_CLK), the first flip-flop circuit 331 outputs the first reference voltage V1. In some embodiments, the first reference voltage V1 may be a ground voltage. The first reference voltage V1 may be transmitted to the external digital signal processing apparatus through the buffer 350 of FIG. 2 to indicate that the digital touch data TDATA of FIG. 2 is started. After the first flip-flop circuit 331 outputs the first reference voltage V1, the second flip-flop circuit 332 outputs the first digital touch signal P1. The shift clock signal SHIFT_CLK may be input to the first flip-flop circuit 331 and may be input to the second flip-flop circuit 332 after a predetermined delay time. According to an embodiment, the delay time of the shift clock signal SHIFT_CLK may be a delay time of the transmission line itself to which the shift clock signal SHIFT_CLK is transmitted, and is due to delay circuits added between nodes of the transmission line. Can be. In one embodiment, the shift clock signal SHIFT_CLK in the parallel-to-serial converter 330 is input to the flip-flop circuits 331, 332, 333, 334, 335 substantially simultaneously, and the parallel-to-serial converter 330 May further include delay circuits connected to each of the output terminals of the flip-flop circuits 331, 332, 333, 334, 335. With this configuration, the parallel-to-serial converter 330 can prevent data loss due to clock skew. After the second flip-flop circuit 332 outputs the first digital touch signal P1, in turn, the third flip-flop circuit 333 outputs the second digital touch signal P2, and the fourth The flip-flop circuit 334 outputs the N-th digital touch signal PN-1, and the fifth flip-flop circuit 335 outputs the N-th digital touch signal PN.

The first to Nth digital touch signals P1, P2, PN-1, and PN output from the second to fifth flip-flop circuits 332, 333, 334, and 335 are respectively the first to fourth multiplexers. Fields 341, 342, 343 and 344. The load signal LOAD is in an inactive state on the second rising edge of the shift clock signal SHIFT_CLK, so that the first to fourth multiplexers 341, 342, 343, and 344 are respectively the first to fourth multiplexers. Outputs (341, 342, 343, 344).

On the second rising edge of the shift clock signal SHIFT_CLK, in sequence, the first flip-flop circuit 331 outputs the first digital touch signal P1, and the second flip-flop circuit 332 receives the second The digital touch signal P2 is output, and the fourth flip-flop circuit 334 outputs the Nth digital touch signal PN. The output first digital touch signal P1 is input to the buffer 350 of FIG. 2. The output second to Nth digital touch signals P2 to PN are input to the multiplexers 341, 342, and 343, and the load signal LOAD, which is a selection signal of the multiplexers 341, 342, and 343, is in an inactive state. As such, the second to Nth digital touch signals P2 to PN are input to corresponding flip-flop circuits 331, 332, and 333, respectively.

In this manner, the first reference voltage V1 and the first through the first to voltage shifted from the fifth flip-flop circuit 335 to the first flip-flop circuit 331 at each rising edge of the shift clock signal SHIFT_CLK. N-th digital touch signals P1, P2, PN-1, and PN are sequentially output to the buffer 350 of FIG. The digital touch data TDATA output by the first flip-flop circuit 331 is sequentially output from the first reference voltage V1 and the first to Nth digital touch signals P1, P2, PN-1, and PN. It is made of.

5 is a block diagram illustrating a driver integrated circuit according to an exemplary embodiment of the present invention.

Referring to FIG. 5, the driver integrated circuit 100a may include a plurality of touch signal processing circuits 300a and 300b and a driver circuit 500a.

The driver circuit 500a of FIG. 5 is the same component as the driver circuit 500 of FIG. 1. Accordingly, description of the driver circuit 500a in FIG. 5 is omitted. Each of the plurality of touch signal processing circuits 300a and 300b may have a configuration substantially the same as that of the touch signal processing circuit 300 of FIG. 1. However, the analog touch signals TSIGNAL of FIG. 1 may be divided and transmitted into each of the analog touch signals TSIGNAL1 and TSIGNALN of FIG. 5. That is, the plurality of touch signal processing circuits 300a and 300b process the analog touch signals TSIGNAL of FIG. 1 processed by the touch signal processing circuit 300 of FIG. 1 in a small number of clocks. The output of the digital touch data TDATA1 and TDATAN may be completed. According to an exemplary embodiment, the number of touch signal processing circuits 300a and 300b included in the driver integrated circuit 100a may be selected. As the number of the touch signal processing circuits 300a and 300b increases, the output of the digital touch data TDATA1 and TDATAN is completed in a small number of clocks, but the number of wirings between the chips increases.

6 is a timing diagram illustrating control signals of a driver integrated circuit according to an exemplary embodiment of the present invention.

In FIG. 6, the carry signal STV is input to the driver circuit 500 of FIG. 1 to indicate that a data corresponding to one frame starts to be input, and the image clock signal TP is shown in FIG. A clock signal input to the driver circuit 500 of 1 and used for driving the driver circuit 500 is shown. The load signal LOAD is the load signal LOAD of FIGS. 2, 3, and 4, and the shift clock signal SHIFT_CLK is the shift clock signal SHIFT_CLK of FIGS. 2 and 4, and the flip-flop circuit of FIG. 4. Are input to the fields 331, 332, 333, 334, and 335 to drive the flip-flop circuits 331, 332, 333, 334, and 335.

Referring to FIG. 6, the load signal LOAD may be set to be in a logic “high” state for one period of the image clock signal TP. When the load signal LOAD is input to the level detector 310 of FIGS. 2 and 3, the level detector 310 converts the analog touch signals TSIGNAL into digital touch signals PDATA. When the load signal LOAD is input to the multiplexers 341, 342, 343, 344, and 345 of FIG. 4, the flip-flop circuits 331, 332, 333, 334, and 335 of FIG. 4 may have a first reference voltage. V1 and the digital touch signals PDATA of FIG. 3 are stored. That is, the touch signal processing circuit 300 of FIG. 1 starts the touch signal processing operation by the load signal LOAD. According to an exemplary embodiment, the number of receiving and processing analog touch signals TSIGNAL from the flat panel for one frame may be selected. For example, if the load signal LOAD becomes logic “high” six times during one frame, six touch signal processing operations are performed during one frame.

7 is a block diagram illustrating a flat panel display device according to an exemplary embodiment of the present invention.

Referring to FIG. 7, the flat panel display apparatus includes a flat panel display panel 700 having touch screen sensors, a plurality of horizontal driver integrated circuits 100b and 100c, and a plurality of vertical driver integrated circuits 100d and 100e. Include.

In some embodiments, the flat panel display may be a liquid crystal display, an organic light emitting display, a plasma display panel, or the like. The flat panel display panel 700 includes touch screen sensors. The plurality of horizontal driver integrated circuits 100b and 100c and the plurality of vertical driver integrated circuits 100d and 100e are substantially the same as the driver integrated circuit 100 of FIG. 1 or the driver integrated circuit 100a of FIG. 5, respectively. It may have a configuration. Digital touch data in the horizontal direction is output from the horizontal driver integrated circuits 100b and 100c so that a horizontal component of contact information such as a user's hand or a touch pen can be known, and from the vertical driver integrated circuits 100d and 100e. The digital touch data in the vertical direction is output so that the vertical component of the contact information of the user's hand or the touch pen can be known. Therefore, the contact position of the user's hand or the touch pen may be known from the horizontal driver integrated circuits 100b and 100c and the vertical driver integrated circuits 100d and 100e.

As described above, the driver integrated circuit according to the embodiment of the present invention may be a driver integrated circuit in the vertical direction or a driver integrated circuit in the horizontal direction. That is, since each of the vertical driver integrated circuits and the horizontal driver integrated circuits is integrated into one chip including a touch signal processing circuit, the integrated circuit manufacturing cost and the wiring cost of the printed circuit board may be reduced.

The driver integrated circuit and the flat panel display device including the same according to the exemplary embodiment of the present invention may use fewer integrated circuits, and the number of wirings on the printed circuit board may be reduced.

Although the present invention has been described with reference to the preferred embodiments, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. I will understand.

Claims (11)

A driver circuit for driving a flat display panel; And A touch signal processing circuit which receives analog touch signals from touch screen sensors embedded in the flat panel display panel, converts the analog touch signals into digital touch data, and sequentially outputs the touch signals; And the driver circuit and the touch signal processing circuit are integrated in one chip. The circuit of claim 1, wherein the touch signal processing circuit comprises: A level detector which receives the analog touch signals from the touch screen sensors and converts them into digital touch signals; And And a parallel-to-serial converter which receives and stores the digital touch signals, converts the stored digital touch signals into the digital touch data, and sequentially outputs the signal through one signal line. The method of claim 2, wherein the level detector, A discharge circuit for discharging charges accumulated in the touch screen sensors in response to a reset signal; And And an analog-to-digital converter for converting the analog touch signals into the digital touch signals in response to a load signal. The method of claim 3, wherein the parallel-to-serial converter, A plurality of multiplexers for receiving the load signal as a selection signal; And A plurality of flip-flop circuits for outputting the digital touch data through the one signal line, Receive each of the digital touch signals at a first input terminal of each of the multiplexers, An output terminal of each of the multiplexers is connected to an input terminal of each of the flip-flop circuits, each of the multiplexers forming one stage with respective corresponding flip-flop circuits, Output terminals of the flip-flop circuits are each connected to a second input terminal of the multiplexer of a next stage, The multiplexers output the digital touch signals when the load signal is in an activated state, output the signal received at the second input terminal when the load signal is in an inactive state, The flip-flop circuits sequentially output the digital touch signals by storing the digital touch signals when the load signal is in an active state and shifting the stored digital touch signals in response to a shift clock signal when the load signal is in an inactive state. Driver integrated circuit. The method of claim 4, wherein the parallel-to-serial converter, The multiplexer of an output terminal of the multiplexers outputs a first reference voltage when the load signal is activated, A flip-flop circuit of an output stage of the flip-flop circuits stores the first reference voltage when the load signal is in an active state, and stores the first reference voltage in response to a shift clock signal when the load signal is in an inactive state. And sequentially outputting the digital touch signals stored in flip-flop circuits. The circuit of claim 2, wherein the touch signal processing circuit comprises: And a buffer for receiving the digital touch data from the parallel-to-serial converter to increase the output level of the digital touch data. A driver circuit for receiving image data and image control signals to drive a flat panel display panel; And A plurality of touches that receive analog touch signals from touch screen sensors embedded in the flat panel display panel, convert the analog touch signals into digital touch data, and sequentially output the digital touch data through a single signal line; Including signal processing circuits, And the driver circuit and the plurality of touch signal processing circuits are integrated on one chip. A flat panel display panel including touch screen sensors; A first direction touch signal processing circuit and the flat panel display panel configured to receive first direction analog touch signals in a first direction from the touch screen sensors, convert the first direction analog touch signals into first direction digital touch data, and sequentially output the signal through one signal line; A first direction driver integrated circuit including a first direction driver circuit for driving a single chip, wherein the first direction driver integrated circuit is implemented as a single chip; And A second direction touch signal processing circuit and the flat panel display panel configured to receive second direction analog touch signals in a second direction from the touch screen sensors, convert the second direction analog touch signals into second direction digital touch data, and sequentially output the same through one signal line; And a second direction driver circuit configured to drive the second direction driver circuit, wherein the second direction driver integrated circuit comprises a second chip. The method of claim 8, The first direction driver integrated circuit is a source driver integrated circuit, And the second direction driver integrated circuit is a gate driver integrated circuit. A flat panel display panel including touch screen sensors; First direction touch signal processing circuits for receiving first direction analog touch signals in a first direction from the touch screen sensors, converting the first direction analog touch signals into first direction digital touch data, and sequentially outputting the signal through one signal line; A plurality of first direction driver integrated circuits including first direction driver circuits for driving the flat panel display panel, each of which is implemented as a single chip; And Second direction touch signal processing circuits for receiving second direction analog touch signals for a second direction from the touch screen sensors, converting the second direction digital touch data into second direction digital touch data, and sequentially outputting the signal through one signal line; A flat panel display comprising a plurality of second direction driver integrated circuits comprising second direction driver circuits for driving the flat panel display panel, each implemented by one chip. The method of claim 10, The first directional driver integrated circuits are source driver integrated circuits, And the second direction driver integrated circuits are gate driver integrated circuits.

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