KR20040035630A - Flat panel apparatus providing displaying and image sensing simultaneously and displaying and sensing method of the same - Google Patents

Abstract

PURPOSE: A flat device simultaneously picking up an image with a display is provided to latch pickup circuits of each pixel of an LCD panel and picked data in column unit, and to output the latched data, in order to output the data simultaneously picked up with a display, thereby simultaneously realizing a camera function with a display. CONSTITUTION: The first controller(420) processes an input signal, and generates image data, a row control signal, and a column control signal. A row driver(440) generates a row selection signal under control of the row control signal. A column driver(450) processes the image data according to the column control signal, and outputs the image data to be displayed on one row every one period of the row selection signal as an analog signal. An LCD panel(410) disposes plural pixels in a 2-dimensional matrix type, receives the analog signal from the pixels to transmit the analog signal to a lower plate transparent conductive film, and converts light coming through the conductive film to pick up an outer image. A data latch circuit(460) inputs/stores the converted signal every column, and outputs the converted signal if the converted signal is stored in one row.

Description

Flat panel apparatus providing displaying and image sensing simultaneously and displaying and sensing method of the same

TECHNICAL FIELD The present invention relates to a flat panel display, and more particularly, to a flat panel apparatus and a method for realizing a camera function simultaneously with a display.

Representative of flat panel displays is a thin film transistor (TFT) -liquid crystal display (LCD) method. In addition, an organic electroluminescence (EL) method, a super twisted nematic (STN) -LCD method, a plasma display panel (PDP) method, or the like is used for the flat panel display device.

Hereinafter, since the TFT-LCD is one of the flat panel displays that are most widely used at present, it will be mainly described. 1 is a block diagram illustrating a liquid crystal panel 110 and a peripheral circuit of a general TFT-LCD 100. As shown in FIG. 2, the liquid crystal panel 110 includes a top plate and a bottom plate having a plurality of indium tin oxide (ITO) electrodes for forming an electric field, and a liquid crystal layer between the top plate and the bottom plate. In addition, a polarizing plate attached to the upper plate and the lower plate in order to polarize the light (polarizing) is provided. The brightness of light in the TFT-LCD 100 is controlled by applying a voltage according to the gray level to the ITO electrode of the lower plate for rearranging the liquid crystal molecules. In the lower plate of the liquid crystal panel 110, as shown in FIG. 3, a plurality of switching elements, such as a thin film transistor (TFT) 203 connected to the ITO electrode, are provided to switch the gray voltage to be applied to the ITO electrode. have. The brightness of the light is adjusted in units of pixels by switching elements such as the TFT 203, and the three-color, R (red), G (green), and B colors are arranged by a pixel structure having a color filter array arranged as shown in FIG. (blue) is displayed. The back light 150 disposed below the liquid crystal panel 110 is a light source that emits monochromatic light, and receives a predetermined voltage from the controller 120 to emit light. Light emitted from the backlight 150 is passed through a polarizing plate (not shown) under the bottom plate, an ITO on the bottom plate, a liquid crystal layer, an ITO (not shown) on the top plate, a color filter on the top plate, and a polarizing plate (not shown) on the top plate. It comes out of the liquid crystal panel 110.

In FIG. 1, the TFT-LCD 100 includes a row driver 130 for driving a plurality of gate lines 202 provided horizontally in the LCD panel 110, and a gray scale voltage (grey) voltage to an electrode through the TFT 203. A column driver 140 for driving a plurality of source lines 201 vertically provided in the LCD panel 110 for supplying a voltage), and controlling the row driver 130 and the column driver 140. The control unit 120 is provided. In general, the controller unit 120 is disposed outside the liquid crystal panel 110. The row driver 130 and the column driver 140 are generally disposed outside the liquid crystal panel 110, but in the case of a chip on glass (COG) type, the row driver 130 and the column driver 140 may be disposed on the liquid crystal panel 110.

However, such a general TFT-LCD 100 simply receives R, G, and B data input from the outside, and displays a corresponding image on the liquid crystal panel 110, but does not perform a camera function. That is, in recent years, with the development of information technology (IT) technology, as the display device such as the TFT-LCD 100 used in connection with a personal computer (PC) is required to be diversified, the display device is a camera function Even if it does, it provides a lot of convenience to the user. For example, if a user using the Internet uses an IP (internet protocol) phone and looks at the other party's appearance, the user will feel more satisfied. However, at present, there is a problem in that a separate camera is mounted on a PC and used, thus costing a lot.

In addition, in the general display structure in which the camera is mounted, the other person can be seen using the camera, but in connection with security on the Internet communication, authentication using personal characteristics such as fingerprint recognition cannot be performed. Accordingly, in the current authentication procedure on the Internet communication, an authentication key is inputted, and this method is not effective in the case where the authentication key is stolen. Accordingly, there is a need for a display apparatus capable of authenticating by recognizing a specific body of a user such as a fingerprint without using an authentication key in internet communication.

Accordingly, the technical problem to be achieved by the present invention is to provide a flat panel apparatus and a method for imaging simultaneously with a display.

BRIEF DESCRIPTION OF THE DRAWINGS In order to better understand the drawings cited in the detailed description of the invention, a brief description of each drawing is provided.

1 is a block diagram showing a liquid crystal panel and a peripheral circuit of a general TFT-LCD.

2 is a view for explaining a relationship between an upper plate and a lower plate in a general liquid crystal panel.

3 is a pixel circuit diagram of a general liquid crystal panel.

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

FIG. 5 is a block diagram illustrating a pixel circuit of the liquid crystal panel of FIG. 4.

6 is a diagram illustrating the pixel circuit of FIG. 5 in detail.

FIG. 7 is an example illustrating a circuit of the sense amplifier of FIG. 6.

FIG. 8 is an example of implementing the optical device of FIG. 6 in a liquid crystal panel.

According to an aspect of the present invention, there is provided a flat panel display and imaging device, including: a first controller configured to process an input signal to generate image data, a row control signal, and a column control signal; A row driver generating a row selection signal under the control of the row control signal; A column driver for processing the image data according to the column control signal, and outputting image data to be displayed in one row every period of the row selection signal as an analog signal; A plurality of pixels are arranged in the form of a two-dimensional matrix, receive the analog signal from each of the pixels of the row sequentially selected according to the row selection signal, and transmit the analog signal to the lower transparent conductive film, and simultaneously A liquid crystal panel for capturing an external image by photoelectric conversion of light entering through the upper transparent conductive film; And a data latch circuit under the control of the photoelectric conversion control signal, receiving and storing the photoelectric conversion signal for each column, and outputting the stored photoelectric conversion signal when a photoelectric conversion signal corresponding to one row is stored. It features.

Each of the pixels of the liquid crystal panel may include a gate line configured to receive the row selection signal; A first source line receiving the analog signal; A first TFT selectively or not transmitting the analog signal to the lower transparent conductive film in accordance with the logic state of the row selection signal; An imaging circuit for photoelectrically converting and outputting light input through the upper plate transparent conductive film; And a second source line transferring the photoelectrically converted signal to the data latch circuit. The imaging circuit includes an optical device for converting the incoming light into an electrical signal; A second TFT selectively outputting or not outputting the electrical signal according to a logic state of a row select signal input to a gate line of a next row adjacent to the gate line; And a sense amplifier which senses and amplifies the electrical signal input from the second TFT and outputs the digital signal as a digital signal. The optical device is formed between a position where the upper black matrix is absent and a position where the lower black matrix is present.

The optical device includes an anode electrode made of a material forming the gate line; A first thin film made of a P-type semiconductor material in contact with the anode electrode; And a second thin film in contact with the first thin film and made of the transparent conductive film material, wherein the electrical signal is transmitted from the second thin film to the second TFT through the transparent conductive film. The sense amplifier includes: a third TFT having a gate terminal connected to the first node, a source terminal connected to the gate line, and a drain terminal connected to the second source line; A fourth TFT connected with the second source line, a source terminal connected with the gate line, and a drain terminal connected with the first node; A fifth TFT having a gate terminal receiving an electrical signal input from the second TFT, a source terminal being connected to the second source line, and a drain terminal being connected to a second node; A sixth TFT connected with the gate line of the next row, a source terminal connected with the first node, and a drain terminal connected with the second node; And a gate terminal connected to the gate line of the next row, a source terminal connected to the second node, and a drain terminal having a seventh TFT connected to the gate line of the next row, the drain terminal of the TFTs and The source terminals do not need to be distinguished from each other. The first to seventh TFTs are all P-type TFTs.

The flat panel display and imaging device further includes an imaging controller that generates the photoelectric conversion control signal for controlling the data latch circuit. The imaging control unit may store or use a photoelectrically converted signal output from the data latch circuit for display. The imaging controller may include a second controller configured to generate the photoelectric conversion control signal and to process the photoelectrically converted signal output from the data latch circuit to generate display data or to generate a storage control signal to store the display data; And a memory configured to store the display data according to the storage control signal. The second controller may be configured to output the display data stored in the memory to the outside according to a user's request. The display data may be processed by the first controller and input to the column driver to display a corresponding image.

According to another aspect of the present invention, there is provided a flat panel display and imaging method comprising: generating image data, a row control signal, and a column control signal by processing an input signal; Generating a row selection signal under control of the row control signal; Processing the image data according to the column control signal, and outputting image data to be displayed in one row every cycle of the row selection signal as an analog signal; A liquid crystal panel in which a plurality of pixels are arranged in a two-dimensional matrix form, receiving an analog signal from each of pixels in a row sequentially selected according to the row selection signal and transferring the analog signal to the lower transparent conductive film; Capturing an external image by the liquid crystal panel photoelectrically converting light input through the upper transparent conductive film in each of the pixels of the selected row while transmitting the corresponding analog signal to each of the pixels; And receiving and storing the photoelectric conversion signal for each column under the control of the photoelectric conversion control signal, and outputting the stored photoelectric conversion signal when the photoelectric conversion signal corresponding to one row is stored. do. The photoelectrically converted signal may be stored in a predetermined memory or used for a display. The signal stored in the memory may be output to the outside according to a user's request.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

4 is a block diagram illustrating a flat panel display and imaging device 400 according to an embodiment of the present invention. Referring to FIG. 4, the flat panel display and imaging apparatus 400 includes a liquid crystal panel 410, a first controller 420, an imaging controller 430, a row driver 440, and a column driver ( 450, a data latch circuit 460, and a back light 470.

In the liquid crystal panel 410, as in the general pixel array form, a plurality of pixels are arranged in a 2D matrix form. The first controller 420 transmits the externally input image signals R, G, and B to each pixel of the liquid crystal panel 410, and displays the image signals R, G, and B. Processing to generate image data to be provided to the column driver 450. In addition, the first controller 420 generates a row control signal for controlling the row driver 440 and a column control signal for controlling the column driver 450. The column control signal for controlling the column driver 450 may include various synchronization signals (including horizontal and vertical synchronization signals), voltages for gamma correction, and a power supply voltage required to drive the column driver 450. Include them. The row control signal for controlling the row driver 440 includes a start pulse synchronized with a vertical synchronization signal (eg, 60 Hz), and in addition, power supply voltages required to drive the row driver 440. .

The row driver 440 generates a row selection signal under the control of the row control signal. The row selection signal is a signal for sequentially selecting each row of the liquid crystal panel 410. When the row selection signal is activated from the first logic state (logical low state) to the second logic state (logical high state), the row selection signal is selected. . The row driver 440 is a circuit in the form of a shift register, and the shift register activates the first row gate line of the pixel array using the start pulse input from the first controller 420. Let's do it. The signal that activates the first row gate line activates the next row again. As described above, the row selection signal for activating each row is a signal for activating each row in turn for each period of the horizontal synchronization signal. For example, at VGA (video graphics array) resolution, the number of pixels is 480 * 640, so when the vertical sync signal is 60 Hz, the horizontal sync signal is 60 * 480 Hz.

The column driver 450 processes the image data input from the first controller 420 according to the column control signal, and outputs image data to be displayed in one row for each period of the row selection signal as an analog signal. do. One period of the row selection signal is equal to one period of the vertical synchronization signal (for example, 60 Hz).

The liquid crystal panel 410 receives the analog signal from each of the pixels in the row sequentially selected according to the row selection signal, and transmits the analog signal to the lower transparent conductive film, and simultaneously through the upper transparent conductive film in each of the pixels of the selected row. An external image is captured by photoelectric conversion of incoming light. The operation of the liquid crystal panel 410 will be described in more detail with reference to FIGS. 5 and 6.

The data latch circuit 460 is controlled by the photoelectric conversion control signal input from the imaging control unit 430, receives and stores the photoelectrically converted signal from the liquid crystal panel 410 for each column, and corresponds to one row. When the photoelectrically converted signal is stored, the stored photoelectrically converted signal is output. The data latch circuit 460 periodically receives and outputs a photoelectrically converted signal corresponding to one row.

The backlight 470 is a light source disposed under the liquid crystal panel 410 to emit monochromatic light, and receives a predetermined voltage from the first controller 420 to emit light. The light emitted from the backlight 470 is passed through a polarizing plate (not shown) under the bottom plate, an ITO on the bottom plate, a liquid crystal layer, an ITO (not shown) on the top plate, a color filter on the top plate, and a polarizing plate (not shown) on the top plate. It comes out of the liquid crystal panel 410.

The imaging controller 430 includes a second controller 431 and a memory 432. The second controller 431 generates the photoelectric conversion control signal for controlling the data latch circuit 460. The second controller 431 may process the photoelectrically converted signal output from the data latch circuit 460 to generate display data R ′, G ′, and B ′. In this case, as the first controller 420 processes the image signals R, G, and B input from the outside, the first controller 420 may display the display data R ', G', and B 'of the liquid crystal panel 410. The display data R ', G', and B 'are processed to generate the image data to be provided to the column driver 450 in order to display each pixel. In addition, the second controller 431 may generate a storage control signal for storing the display data R ', G', and B '. The display and storage of the display data R ', G', and B 'are for using the photoelectrically converted signal in which an external image is captured, and the liquid crystal panel 410 returns an image corresponding to the photoelectrically converted signal. In the case of display through), the display data R ', G', and B 'are generated. By a picture in picture (PIP) or picture on picture (POP) function, a user may view an image corresponding to the display data R ′, G ′, and B ′ through a portion of the liquid crystal panel 410. At the same time, it is possible to enjoy still images or moving images corresponding to the image signals R, G, and B input from a system such as a PC through other portions of the liquid crystal panel 410. In the PIP or POP function, the first controller 420 processes the image signals R, G, and B input from the outside and the display data R ', G', and B 'output from the second controller. Is performed. That is, the first controller 420 may display an image corresponding to the image signals R, G, and B input from the outside through a portion of the liquid crystal panel 410, and the liquid crystal panel 410 In this case, the image corresponding to the display data R ', G', and B 'outputted from the second controller 431 may be displayed through another part of the C).

The memory 432 may store the display data R ′, G ′, and B ′ according to the storage control signal. The second controller 431 may output the display data R ′, G ′, and B ′ stored in the memory 432 to the outside according to a user's request. The liquid crystal panel 410 captures an external image, that is, an image unfolded in front of the liquid crystal panel 410. A scanner function is also possible. In particular, the liquid crystal panel 410 may be used in a user ID authentication procedure for authentication for Internet communication. That is, when the user wants to connect to a certain web-site requiring authentication, a perfect ID authentication procedure can be achieved by simply placing a finger or the like in front of the liquid crystal panel 410. That is, in the case of requesting input data requiring a predetermined authentication period in charge of the user ID authentication procedure, instead of inputting a password or the like through the keyboard, when a finger is placed in front of the liquid crystal panel 410, the liquid crystal panel 410 Captures an image, and the data latch circuit 460 outputs a photoelectrically converted signal corresponding to the fingerprint. Accordingly, the second controller 431 generates the display data R ', G', and B ', which are signals capable of displaying the photoelectrically converted signal, stores the display data in the memory 432, and displays the display data. The R ', G', and B 'may be output to the outside of the memory 432 under the control of a PC and transmitted to the corresponding certification authority. As such, the imaging controller 430 stores the photoelectrically converted signal output from the data latch circuit 460 in the memory 432 or uses the display.

5 is a block diagram illustrating a pixel circuit of the liquid crystal panel 410 of FIG. 4. 5 illustrates a circuit structure of each pixel of the liquid crystal panel 410. Referring to FIG. 5, the pixel circuit includes a first source line 501, a second source line 502, a gate line 503, a first TFT T1, and an imaging circuit 510. The first source line 501 receives the analog signal input from the column driver 450. The second source line 502 transfers the photoelectrically converted signal generated by the liquid crystal panel 410 to the data latch circuit 460. The gate line 503 receives the row select signal input from the row driver 440. The first TFT T1 is a switching element that selectively or does not transmit the analog signal to the lower transparent conductive film according to the logic state of the row selection signal. The imaging circuit 510 photoelectrically converts light coming through the upper transparent conductive film using a photodiode (PD) and outputs the photoelectric conversion.

6 is a diagram illustrating the pixel circuit of FIG. 5 in detail. Referring to FIG. 6, the imaging circuit 510 includes an optical device PD, a second TFT T2, and a sense amplifying circuit 511. The optical device PD converts light coming through the upper transparent conductive film into an electrical signal. The second TFT T2 is a switching element that selectively outputs or does not output the electrical signal according to the logic state of the row select signal input to the gate line 504 of the next row adjacent to the gate line 503. . The sense amplifier 511 senses and amplifies an electrical signal input from the second TFT T2 and outputs the digital signal. That is, since the electrical signal generated by the optical device PD is fine, it is amplified, so that the sense amplifier 511 receives the electrical signal transmitted through the second TFT T2 in a first logic state or a second state. Output with logic voltage. Here, the voltage of each of the first logic state and the second logic state is equal to the voltage of the first logic state and the second logic state of the row select signal provided to the gate lines of the pixel array.

FIG. 7 is an example illustrating a circuit of the sense amplifier 511 of FIG. 6. Referring to FIG. 7, the sense amplifier 511 may include a third TFT (T11), a fourth TFT (T12), a fifth TFT (T13), a sixth TFT (T14), and a seventh TFT (T15). Equipped. In the third TFT T11, a gate terminal is connected to the first node ND1, a source terminal is connected to the gate line 503, and a drain terminal is connected to the second source line 502. In the fourth TFT T12, a gate terminal is connected with the second source line 502, a source terminal is connected with the gate line 503, and a drain terminal is connected with the first node ND1. . In the fifth TFT (T13), a gate terminal receives an electrical signal input from the second TFT (T2), a source terminal is connected to the second source line 502, and the drain terminal is a second node (ND2). ) Is connected. In the sixth TFT T14, a gate terminal is connected to the gate line 504 of the next row, a source terminal is connected to the first node ND1, and a drain terminal is connected to the second node ND2. Connected. In the seventh TFT T15, a gate terminal is connected with the gate line 504 of the next row, a source terminal is connected with the second node ND2, and a drain terminal is a gate line 504 of the next row. ) Is connected. In the above TFTs T11 to T15, as is well known, when the TFTs T11 to T15 are all p-type, the TFT drain terminal and the source terminal are not strictly distinguished, The higher voltage is the source terminal, and the lower voltage is the drain terminal. Preferably, the TFTs T11 to T15, the first TFT T1, and the second TFT T2 are all p-type, but are not limited thereto and may be N-type (n) as necessary. -type), and only some of them may be P-type or N-type.

The sense amplifier 511 has a differential amplifier structure, as shown in FIG. 7, and after one gate line 503 is activated, a sense amplification is performed when the next gate line 504 is activated. Perform the action. For example, when the TFTs T11 to T15 are all P-type, the voltage of the first logic state applied to the gate lines is 0 Volt, and the voltage of the second logic state is -15 Volt. In this case, the sense amplification operation is performed when the gate line 503 is 0 Volt and the gate line 504 is -15 Volt. When the sense amplification operation is performed, in FIG. 6, the optical device PD generates a photoelectrically converted electrical signal, the second TFT T2 is activated, and the sense amplifier 511 generates the photoelectrically converted electrical signal. It receives and outputs the corresponding digital value. For example, when an external bright light comes in, the optical device PD reacts to generate an electrical signal having a voltage having a relatively low magnitude compared to when dark. The seventh TFT T13 is activated in the sense amplifier 511 by the electrical signal at this time input to the sense amplifier 511 through the second TFT T2, and in response thereto, the second source line ( The digital value of the second logic state -15 Volt is output through the 502. When the external light is dark, the optical device PD does not react and generates an electrical signal having a voltage of a relatively larger magnitude than when it is bright. The seventh TFT 13 in the sense amplifier 511 is not activated by the electrical signal at this time input to the sense amplifier 511 through the second TFT T2, and the sixth TFT T14 is activated. ), The digital value of the first logical state (0Volt) is output through the second source line 502.

FIG. 8 is an example of implementing the optical device PD of FIG. 6 to the liquid crystal panel 410. Referring to FIG. 8, in the lower plate process of the liquid crystal panel 410, first, the first TFT T1, the first source line 501, and the second source line (which do not need to transmit light of the backlight 470) 502, a black matrix is applied to the image pickup circuit 510 and the lower portion of the optical device PD. The backlight 470 light passes through the transparent conductive film such as ITO formed on the lower and upper plates according to the voltage applied to the liquid crystal between the transparent conductive film (ITO) formed on the lower plate and the upper plate and displays the color filter 620 at the time of display. It passes through and appears in three colors of appropriate gradation of red, green, and blue.

As shown in FIG. 8, the optical device PD is formed between a position 610 without the upper black matrix and a position with the lower black matrix. The optical device PD has an anode electrode 603, a first thin film 604, and a second thin film 605. The anode electrode 603 is made of a metal material forming gate lines of the liquid crystal panel 410. The anode electrode 603 is the same as a material forming the gate electrode 601 of the first TFT T1 and a material forming the gate electrode 461 of the imaging circuit 510. The first thin film 604 is made of a P-type semiconductor material in contact with the anode electrode. The second thin film 605 is made of a transparent conductive film material that is in contact with the first thin film and can transmit light such as ITO. When the second thin film 605 is ITO, since the ITO is generally an N-type material, the first thin film 604 and the second thin film 605 have a PN junction diode structure. Accordingly, when light enters through the second thin film 605, an electron-hole pair is generated at the junction between the first thin film 604 and the second thin film 605, and the generated electrons are directed toward the anode. The generated holes flow toward the opposite side to generate an electrical signal between both ends of the optical device PD. As described above, the photoelectrically converted electrical signal is transferred from the second thin film to the second TFT (T2) active layer (semiconductor material layer) in the imaging circuit 510 through the transparent conductive film. do. That is, since the coating process of the transparent conductive film such as ITO is performed at the last step of the lower plate, the electrical signal photoelectrically converted in the optical device PD may be transferred through the transparent conductive film without adding a metal process of an upper layer. It is preferable to transfer from the second thin film 605 to the second TFT (T2) active layer (semiconductor material layer).

As described above, in the flat panel display and imaging device 400 according to an embodiment of the present invention, the liquid crystal panel 410 picks up an external image simultaneously with the display. The display of the flat panel display and imaging device 400 is performed by supplying image data to each pixel of the liquid crystal panel 410 by the operation of the row driver 440 and the column driver 450 as in the related art. Imaging of the flat panel display and imaging device 400 is based on the operation of the imaging circuit 510 included in each pixel of the liquid crystal panel 410 and the data latch circuit 460 which latches and outputs the captured data in units of columns. As a result, data captured simultaneously with the display is output to the external or column driver 450.

As described above, optimal embodiments have been disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

As described above, in the flat panel display and imaging device according to the present invention, since the liquid crystal panel itself performs a camera function without a separate camera, a cost for purchasing a camera required for Internet communication is reduced, and a finger in front of the liquid crystal panel during authentication for Internet communication. A complete ID verification process can be achieved by simply touching the back. In addition, since the image can be captured by using external light even when the backlight is turned off, a closed circuit television (CCTV) function is possible. After storing the captured image data using a predetermined memory, the stored captured image can be displayed on its own liquid crystal panel or transferred to an external PC. The scanner function can be performed simply by bringing the paper to be scanned on the screen of the other liquid crystal panel.

Claims (15)

A first controller processing the input signal to generate image data, row control signals, and column control signals; A row driver generating a row selection signal under the control of the row control signal; A column driver for processing the image data according to the column control signal, and outputting image data to be displayed in one row every period of the row selection signal as an analog signal; A plurality of pixels are arranged in the form of a two-dimensional matrix, receive the analog signal from each of the pixels in the row sequentially selected according to the row selection signal, and transmit the analog signal to the lower transparent conductive film, and simultaneously in each of the pixels of the selected row. A liquid crystal panel for capturing an external image by photoelectric conversion of light entering through the upper transparent conductive film; And And a data latch circuit configured to receive and store the photoelectric conversion signal for each column under the control of the photoelectric conversion control signal, and output the stored photoelectric conversion signal when the photoelectric conversion signal corresponding to one row is stored. A flat panel display and imaging device. The method of claim 1, wherein each of the pixels of the liquid crystal panel, A gate line receiving the row select signal; A first source line receiving the analog signal; A first TFT selectively or not transmitting the analog signal to the lower transparent conductive film in accordance with the logic state of the row selection signal; An imaging circuit for photoelectrically converting and outputting light input through the upper plate transparent conductive film; And And a second source line for transmitting the photoelectrically converted signal to the data latch circuit. The method of claim 2, wherein the imaging circuit, An optical device for converting the incoming light into an electrical signal; A second TFT selectively outputting or not outputting the electrical signal according to a logic state of a row select signal input to a gate line of a next row adjacent to the gate line; And And a sense amplifier which senses and amplifies the electrical signal inputted from the second TFT and outputs the digital signal as a digital signal. The method of claim 3, wherein the optical device, A flat panel display and imaging device, characterized in that formed between a position where there is no upper black matrix and a position where a lower black matrix is present. The method of claim 3, wherein the optical device, An anode made of a material forming the gate line; A first thin film made of a P-type semiconductor material in contact with the anode electrode; And And a second thin film made of the transparent conductive film material in contact with the first thin film, wherein the electrical signal is transmitted from the second thin film to the second TFT through the transparent conductive film. Device. The method of claim 3, wherein the sense amplifier, A third TFT connected with a gate terminal, a source terminal connected with the gate line, and a drain terminal connected with the second source line; A fourth TFT connected with the second source line, a source terminal connected with the gate line, and a drain terminal connected with the first node; A fifth TFT having a gate terminal receiving an electrical signal input from the second TFT, a source terminal being connected to the second source line, and a drain terminal being connected to a second node; A sixth TFT connected with the gate line of the next row, a source terminal connected with the first node, and a drain terminal connected with the second node; And A gate terminal is connected with the gate line of the next row, a source terminal is connected with the second node, and a drain terminal has a seventh TFT connected with the gate line of the next row, the drain terminal and the source of the TFTs A flat panel display and imaging device characterized by not having to distinguish terminals from each other. The method of claim 6, wherein the first to seventh TFT, Both are P-type TFTs, The flat panel display and imaging device characterized by the above-mentioned. The flat panel display and imaging device of claim 1, And an imaging controller for generating the photoelectric conversion control signal for controlling the data latch circuit. The method of claim 8, wherein the imaging control unit, And a photoelectrically converted signal output from the data latch circuit for use in a display. The method of claim 9, wherein the imaging control unit, A second controller generating the photoelectric conversion control signal and processing the photoelectrically converted signal output from the data latch circuit to generate display data or to generate a storage control signal to store the display data; And And a memory for storing the display data in accordance with the storage control signal. The method of claim 10, wherein the second controller, And a display data stored in the memory to the outside in accordance with a user's request. The method of claim 10, wherein the display data, And the image is processed by the first controller and input to the column driver to display the corresponding image. Processing the input signal to generate image data, row control signals, and column control signals; Generating a row selection signal under control of the row control signal; Processing the image data according to the column control signal, and outputting image data to be displayed in one row every cycle of the row selection signal as an analog signal; A liquid crystal panel in which a plurality of pixels are arranged in a two-dimensional matrix form, receiving an analog signal from each of pixels in a row sequentially selected according to the row selection signal and transferring the analog signal to the lower transparent conductive film; Capturing an external image by the liquid crystal panel photoelectrically converting light input through the upper transparent conductive film in each of the pixels of the selected row while transmitting the corresponding analog signal to each of the pixels; And Under the control of the photoelectric conversion control signal, receiving and storing the photoelectric conversion signal for each column, and outputting the stored photoelectric conversion signal when the photoelectric conversion signal corresponding to one row is stored; Flat display and imaging method. The method of claim 13, wherein the photoelectrically converted signal, A flat panel display and imaging method characterized by being stored in a predetermined memory or used for a display. The method of claim 14, wherein the signal stored in the memory, A flat panel display and imaging method characterized in that it can be output to the outside according to the user's request.