KR101115406B1 - X-ray detector and method for driving the x-ray detector - Google Patents

Abstract

Disclosed are an X-ray detector capable of high speed video recording and a driving method thereof. The X-ray detector includes M gate wires and N data wires arranged to cross each other, and a plurality of pixels arranged in M rows and N columns and electrically connected to the gate wires and the data wires, respectively, provided that M, N is an integer of 2 or more), and the method of driving the X-ray detector includes selecting some pixels for forming an image among pixels in the M rows and N columns, and each of the plurality of gate wires electrically connected to the selected pixels of the gate lines. And applying a scan signal, and outputting a sensing signal from each of some data lines electrically connected to selected pixels of the data lines. As such, by selecting only some of the pixels in the M rows and the N columns, the image is formed to increase the frame frequency of the video when the X-ray detector is operated in the video recording mode.

Description

X-ray detector and its driving method {X-RAY DETECTOR AND METHOD FOR DRIVING THE X-RAY DETECTOR}

The present invention relates to an X-ray detector and a driving method thereof, and more particularly, to an X-ray detector and a driving method thereof for sensing an X-ray transmitted through a human body or an object to extract an image of an internal state.

In general, an X-ray imaging system is a system for photographing the internal state of an object using X-rays, and is mainly used for medical purposes that can examine the state of bone inside the body by photographing a human body.

The X-ray photographing system includes an X-ray tube for emitting X-rays to a photographing object and an X-ray detector for sensing an X-ray passing through the photographing object to extract an internal image of the photographing object.

The X-ray detector may be driven in a still image capturing mode for capturing a still image of the photographing target and a video capturing mode for capturing a video of the capturing target. However, since it takes a certain time to read out the image data stored in each pixel of the X-ray detector, there is a limit to increasing the frame frequency of the video recording mode.

Therefore, the present invention is to solve the above problems, the problem to be solved by the present invention is to provide an X-ray detector that can increase the frame frequency of the video recording mode.

In addition, another object of the present invention is to provide a driving method for driving the X-ray detector.

The X-ray detector according to an embodiment of the present invention may be driven in any one of a still image shooting mode and a moving image shooting mode, and include a plurality of gate lines, a plurality of data lines, a plurality of pixels, and a scan driver. , A signal output unit and a detector control unit.

The gate lines are formed in a first direction, and the data lines are formed in a second direction crossing the first direction. The plurality of pixels are disposed at points where the gate lines and the data lines cross each other, and are electrically connected to the gate lines and the data lines, respectively, and directly sense X-rays or convert the light by the X-rays. Sensing. The scan driver is electrically connected to the gate lines to provide scan signals to the pixels. The signal output part is electrically connected to the data lines, and receives the sensing signals from the pixels when the scan signals are applied to the pixels and outputs the sensing signals to the outside. The detector controller controls the scan driver to select some scan signals from the scan signals and provide them as part of the gate lines when the detector controller operates in the moving picture capturing mode, or is applied from a part of the data lines among the sensing signals. The signal output unit is controlled to select and output some sensing signals.

The X-ray detector may further include a signal processor that receives the sensing signals from the signal output unit and performs image processing such as interpolation using the sensing signals.

The detector controller may control the scan controller to provide the partial scan signals to predetermined multiples of the gate lines, and the partial sensing signal applied from the multiples of the data lines. The signal output unit may be controlled to output the signal.

Alternatively, the detector controller may control the scan controller to provide the partial scan signals to a predetermined number of wires arranged adjacent to each other among the gate wires, and the constant detector arranged to be adjacent to each other among the data wires. The signal output unit may be controlled to output the some sensing signals applied from the number of wires.

On the other hand, the X-ray detector is formed in the first direction or the second direction and the bias lines electrically connected to the pixels, respectively, and the bias voltage for driving each of the pixels electrically connected to the bias lines It may further include a bias unit for providing.

Subsequently, the driving method of the X-ray detector according to the exemplary embodiment of the present invention includes M gate wires and N data wires arranged to intersect with each other, M row N columns, and the gate wires and the data wires, respectively. A method of driving an X-ray detector including a plurality of pixels electrically connected to a plurality of pixels, the method comprising: selecting some of the pixels to form an image, and selecting some of the pixels to be electrically connected to the selected pixels. Applying a scan signal to each of the gate lines, and outputting a sensing signal from each of some data lines electrically connected to the selected pixels of the data lines.

The method of driving the X-ray detector may include forming a partial image image corresponding to the selected pixels using sensing signals applied from the partial data lines, and performing image processing of the partial image image by interpolation. The method may further include forming an approximate image image close to the complete image image corresponding to all of the pixels.

The selected pixels may be pixels arranged in a row of a predetermined multiple of the pixels, or pixels arranged in a column of a predetermined multiple of the pixels. Alternatively, the selected pixels may be pixels arranged in a row disposed adjacent to each other of the pixels, or pixels selected in a column disposed adjacent to each other among the pixels.

According to the X-ray detector and its driving method, by selecting only some of the pixels in the M rows and N columns to form an image, when the X-ray detector is operated in the video recording mode, the frame frequency of the video can be increased. As a result, high-speed video can be recorded.

1 is a block diagram illustrating an x-ray imaging system according to an exemplary embodiment of the present invention.
FIG. 2 is a circuit diagram illustrating an X-ray detector of the X-ray imaging system of FIG. 1.
FIG. 3 is a diagram for describing a process of extracting an image from all pixels of the X-ray detector of FIG. 2.
FIG. 4 is a diagram for describing a process of extracting an image from pixels of odd columns of the X-ray detector of FIG. 2.
FIG. 5 is an enlarged view of part I- of FIG. 4.
FIG. 6 is a diagram for describing a process of extracting an image from pixels of 1, 5, 9, ... columns of the X-ray detector of FIG. 2.
FIG. 7 is an enlarged view of part II- of FIG. 6.
FIG. 8 is a diagram for describing a process of extracting an image from pixels of odd rows of the X-ray detector of FIG. 2.
FIG. 9 is an enlarged view of part III-8 of FIG. 8.
FIG. 10 is a diagram for describing a process of extracting an image from pixels of odd columns and odd rows of the X-ray detector of FIG. 2.
FIG. 11 is an enlarged view of a IV-part of FIG. 10.
FIG. 12 is a diagram for describing a process of extracting an image from pixels of 1, 5, 9, ... columns and odd rows of the X-ray detector of FIG. 2.
FIG. 13 is an enlarged view of part V-of FIG. 12.
FIG. 14 is a diagram for describing a process of extracting an image from some pixels adjacent to each other of the X-ray detector of FIG. 2.

As the inventive concept allows for various changes and numerous embodiments, 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 the specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

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

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

1 is a block diagram illustrating an x-ray imaging system according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the X-ray imaging system according to the present embodiment includes an X-ray detector 100 capable of sensing X-rays, an X-ray generator 200 capable of providing X-rays to the X-ray detector 100, and the X-rays. The display apparatus 300 may include a display device 300 electrically connected to the detector 100 to display an image image. That is, the X-ray detector 100 receives the X-ray generated by the X-ray generating apparatus 200 and passes through the photographing object 10 and senses the image, and displays the image data of the internal image of the photographing object 10. Provided to the device 300 to display the internal image to the outside.

The X-ray detector 100 may be driven in any one of a still image photographing mode for photographing a still image of the photographing subject 10 and a video photographing mode for photographing a video of the photographing subject 10. In this case, when the X-ray detector 100 is driven in the video recording mode, for example, the video of the photographing target 10 may be captured at a frame frequency of 60 Hz.

FIG. 2 is a circuit diagram illustrating an X-ray detector of the X-ray imaging system of FIG. 1.

1 and 2, the X-ray detector 100 includes a plurality of gate lines GL, a plurality of data lines DL, a plurality of bias lines BL, and a plurality of pixels 110. The scan driver 120 may include a signal output unit 130, a bias unit 140, a detector controller 150, and a signal processor 160.

The gate lines GL are formed in a first direction parallel to each other, and the data lines DL are formed in a second direction parallel to each other in the first direction. In this case, the first and second directions preferably cross perpendicular to each other. Meanwhile, the bias lines BL are formed in one of the first direction and the second direction.

The pixels 110 are arranged in a matrix form to correspond to a point where the gate lines GL and the data lines DL intersect each other, and thus the gate lines GL and the data lines DL. ) Are electrically connected to each other. In addition, the pixels 110 are electrically connected to the bias lines BL, respectively.

The pixels 110 may directly sense X-rays passing through the photographing object 10 or change the X-rays to other light and then sense them. In this case, when the pixels 110 sense light formed by changing the X-ray, the X-ray imaging system further includes an X-ray converter (not shown) for changing the X-ray to light that can be sensed by the pixel. The X-ray converter may be separated or attached to the X-ray detector 100 or may be embedded in the X-ray detector 100.

Each of the pixels 110 includes a light sensing diode DI that directly or indirectly senses the X-ray, a capacitor CP that accumulates charges formed by sensing the light sensing diode DI, and the gate wiring line. The thin film transistor TR may output a charge stored in the capacitor CP, that is, a sensing signal along the data line DL, by the scan signal applied from GL. Specifically, for example, the gate line GL may include a gate terminal of the thin film transistor TR, the data line DL may include a drain terminal of the thin film transistor TR, and a source of the thin film transistor TR. The terminal may be electrically connected to the first terminal of the capacitor CP and the N side terminal of the light sensing diode DI. In addition, the bias line BL may be electrically connected to the second terminal of the capacitor CP and the P-side terminal of the light sensing diode DI. Meanwhile, each of the pixels may have a circuit of another type in addition to the circuit shown in FIG. 2.

The scan driver 120 is electrically connected to the gate lines GL to apply the scan signal to each of the gate lines GL. In this case, the scan driver 120 may select some of the gate lines of the gate lines GL and apply the scan signal.

The signal output unit 130 is electrically connected to the data lines DL to receive the sensing signal from each of the pixels 110 and output the sensing signal to the signal processor 160. In this case, the signal output unit 130 may select some data lines of the data lines DL to output the sensing signal to the signal processor 160.

The bias unit 140 is electrically connected to the bias lines BL to provide a bias voltage to each of the pixels 110. Specifically, for example, the bias unit 140 may apply a first bias voltage higher than the reference voltage generated from the signal output unit 130 or a second bias voltage lower than the reference voltage. At this time, when the first bias voltage is applied to the P-side terminal of the light sensing diode DI, the light sensing diode DI is subjected to a reverse voltage bias, and the second bias voltage is applied to the light sensing diode DI. When applied to the P-side terminal of), the photosensitive diode DI is subjected to a forward voltage bias. Meanwhile, unlike FIG. 2, the bias unit 140 may be omitted, and the signal output unit 130 may provide the bias voltage as well as the reference voltage.

The detector controller 150 may be electrically connected to the scan driver 120 and the signal output unit 130 to control the scan driver 120 and the signal output unit 130, respectively. That is, the detector controller 150 may control the scan driver 120 to apply the scan signal by selecting some of the gate lines GL. In addition, the detector controller 160 may control the signal output unit 130 to select some data lines of the data lines DL to output the sensing signal. Meanwhile, the detector controller 150 may control the bias unit 140 to change the bias voltage output from the bias unit 140.

The signal processor 160 may receive the sensing signals output from the signal output unit 130, perform image processing using the sensing signals, and output them to the outside. For example, the signal processing unit 160 receives the sensing signals from the signal output unit 130 in real time and stores the sensing signals using a sensing signal memory (not shown) and the sensing signals stored in the sensing signal memory. And an image processor (not shown) that performs image processing such as interpolation.

Hereinafter, a process of outputting an image by selecting all or part of the pixels using separate drawings will be described.

FIG. 3 is a diagram for describing a process of extracting an image from all pixels of the X-ray detector of FIG. 2.

Referring to FIGS. 2 and 3, when the pixels 110 are arranged in M rows and N columns, sensing signals may be output from all the pixels 100 to form a complete image image (M and N). Is an integer greater than or equal to 2). That is, the scan driver 120 sequentially applies scan signals to all of the gate lines GL, and the signal output unit 130 receives the sensing signals from all of the data lines DL. Output to the signal processor 160. Thereafter, the signal processor 160 may form the complete image image by using the sensing signals applied from all of the data lines DL. In FIG. 3, the pixels 110 are arranged in, for example, 16 rows and 32 columns.

FIG. 4 is a diagram for describing a process of extracting an image from odd-numbered pixels of the X-ray detector of FIG. 2, and FIG. 5 is an enlarged view of part I- of FIG. 4.

2, 4, and 5, an odd-numbered image image may be formed using only pixels arranged in odd-numbered columns among the pixels 110, and the complete image image may be formed by using the odd-numbered image image. It is possible to form an approximate video image corresponding to the.

In detail, the scan driver 120 sequentially applies scan signals to all of the gate lines GL, and the signal output unit 130 performs odd-numbered data lines among the data lines DL. The odd-numbered sensing signals are received from the signal output to the signal processor 160. Thereafter, the signal processor 160 obtains the odd-numbered image image by using the applied odd-numbered sensing signals, and forms an even-numbered interpolation image image corresponding to even-numbered pixels through interpolation. The approximate image image is formed by synthesizing the odd-numbered image image and the even-numbered interpolation image image.

For example, a detailed interpolation method will be described. When an A2 pixel corresponding to the even-numbered pixels is disposed between an A1 pixel corresponding to the odd-numbered pixels and an A3 pixel, the signal processor 160 may be disposed. The image of the A2 pixel is given as an intermediate value between the image of the A1 pixel and the image of the A3 pixel. In this case, when the even-number interpolation image image formed by the interpolation does not cover the even-number image image corresponding to all the even-numbered pixels, the even-number image may not be covered by the even-number interpolation image image. The remaining images of the image may have the same value as adjacent odd-numbered image images or may have predetermined reference values such as white and black.

On the other hand, after forming an even-numbered image image using only pixels arranged in even-numbered columns, not the odd-numbered pixels, an approximated image image corresponding to the complete image image is formed by using the even-numbered image image. It may be.

FIG. 6 is a view for explaining a process of extracting an image from pixels of 1, 5, 9, ... columns of the X-ray detector of FIG. 2, and FIG. 7 is an enlarged view of the II-part of FIG. .

2, 6, and 7, a 4n + 1 column image is formed using only pixels arranged in 4n + 1 columns, that is, 1, 5, 9, ... columns of the pixels 110. In addition, the 4n + 1 column image image may be used to form an approximate image image that closely corresponds to the full image image (where n is an integer of 0 or more).

In detail, the scan driver 120 sequentially applies scan signals to all of the gate lines GL, and the signal output unit 130 supplies 4n + 1 column data among the data lines DL. 4n + 1 column sensing signals are received from the wires and output to the signal processor 160. Thereafter, the signal processor 160 acquires the 4n + 1 column image image by using the applied 4n + 1 column sensing signals, and performs 4n + 2, 4n + 3, and 4n + 4 columns through interpolation. After forming a 4n + 2/3/4 column interpolation image image corresponding to the pixels, the 4n + 1 column image image and the 4n + 2/3/4 column interpolation image image are synthesized to form the approximate image image. do.

For example, a detailed interpolation method will be described. When the B2, B3, and B4 pixels are disposed between the B1 and B5 pixels corresponding to the odd-numbered pixels, the signal processor 160 may determine the B2, B3. And images of B4 pixels as intermediate values between the image of the B1 pixel and the image of the B5 pixel. That is, when the luminance of the image of the B1 pixel is 10 and the luminance of the image of the B5 pixel is 50, the luminance of the image of each of the B2, B3, and B4 pixels may have 20, 30, and 40. In this case, the 4n + 2/3/4 column interpolation image image formed by the interpolation corresponds to 4n + 2/3/4 column corresponding to all of the 4n + 2, 4n + 3 and 4n + 4 column pixels. If the video image cannot be covered, the remaining images of the 4n + 2/3/4 column video image that the 4n + 2/3/4 column interpolation video image does not cover have the same value as the adjacent 4n + 1 column video image. It may have a predetermined reference value, such as white, black.

Meanwhile, some image images are formed using only pixels arranged in any one of 4n + 2, 4n + 3, and 4n + 4 columns, not the 4n + 1 column pixels, and then the partial image images are used. It is also possible to form an approximate video image corresponding to the complete video image.

FIG. 8 is a diagram for describing a process of extracting an image from pixels of odd rows of the X-ray detector of FIG. 2, and FIG. 9 is an enlarged view of the III-part of FIG. 8.

2, 8, and 9, an odd-numbered image image may be formed using only pixels arranged in odd-numbered rows among the pixels 110, and the complete image may be formed by using the odd-numbered image image. An approximate video image corresponding to the image may be formed.

In detail, the scan driver 120 sequentially applies scan signals to odd-numbered gate wires among the gate wires GL, and the signal output unit 130 includes all of the data wires DL. The sensing signals are received from the signal output to the signal processor 160. Thereafter, the signal processor 160 obtains the odd-numbered video image by using the sensed signals and forms an even-numbered interpolated video image corresponding to even-numbered pixels through interpolation. The approximate image image is formed by synthesizing the odd-row image image and the even-row interpolation image image.

For example, a detailed interpolation method is described. When the C2 pixel corresponding to the odd-row pixels is disposed between the C1 pixel and the C3 pixel corresponding to the odd-row pixels, the signal processor 160 The image of the C2 pixel is given as an intermediate value between the image of the C1 pixel and the image of the C3 pixel. In this case, when the even-row interpolated video image formed by the interpolation does not cover the even-row video image corresponding to all the even-row pixels, the even-row interpolated video image does not cover the even-row interpolated video image. The remaining images of the image may have the same value as the adjacent odd-numbered image image or may have a predetermined reference value such as white or black.

On the other hand, after forming an even row image image using only pixels arranged in even rows among the odd row pixels, an approximate image image corresponding to the complete image image is formed using the even row image image. You may.

FIG. 10 is a diagram for describing a process of extracting an image from odd-numbered columns and odd-numbered pixels of the X-ray detector of FIG. 2, and FIG. 11 is an enlarged view of section IV- FIG.

2, 10, and 11, a partial image image may be formed using only pixels arranged in odd rows and odd columns among the pixels 110, and the complete image may be formed using the partial image images. An approximate video image corresponding to the image may be formed.

In detail, the scan driver 120 sequentially applies scan signals to odd-numbered gate lines of the gate lines GL, and the signal output unit 130 of the data lines DL. The odd-numbered sensing signals are received from the odd-numbered data lines and output to the signal processor 160. Thereafter, the signal processor 160 obtains the partial image image by using the applied odd-numbered sensing signals, and interpolates the remaining pixels, that is, odd-numbered and even-numbered columns, even-numbered and odd-numbered columns, And forming a residual interpolation image image corresponding to even-row and even-numbered pixels, and then synthesizing the partial image image and the remaining interpolation image image to form the approximate image image.

A detailed interpolation will be described using, for example, D1, D2, D3, and D4 pixels corresponding to odd-numbered and odd-numbered pixels disposed adjacent to each other, and D5 and D1 pixels between the D1 and D2 pixels. And when the D6 pixel is disposed between the D3 pixels, and the D7 pixel is disposed between the D1 pixel and the D4 pixel, the signal processor 160 may convert the image of the D5 pixel between the image of the D1 pixel and the image of the D2 pixel. As an intermediate value, the image of the D6 pixel is an intermediate value between the image of the D1 pixel and the image of the D3 pixel, and the image of the D7 pixel is an intermediate value between the image of the D1 pixel and the image of the D4 pixel. Give each one. In this case, when the remaining interpolated image image formed by the interpolation does not cover the remaining image image corresponding to all odd rows and even columns, even rows and odd columns, and even rows and even columns pixels, Some images of the remaining image images that are not covered by the remaining interpolation image images may have the same value as adjacent odd-row and odd-numbered image images, or may have predetermined reference values such as white and black.

Meanwhile, after forming some image images using only pixels arranged in any one of odd rows and even columns, even rows and odd columns, and even rows and even columns, not the odd rows and odd columns pixels, Some image images may be used to form an approximate image image corresponding to the full image image.

FIG. 12 is a diagram for describing a process of extracting an image from pixels of 1, 5, 9, ... columns and odd rows of the X-ray detector of FIG. 2, and FIG. 13 is an enlarged view of part V of FIG. 12. Figure is shown.

Referring to FIGS. 2, 12, and 13, some image images may be formed using only pixels arranged in odd rows and 4n + 1 columns among the pixels 110, and using the partial column image images. An approximate video image corresponding to the complete video image may be formed (where n is an integer of 0 or more).

In detail, the scan driver 120 sequentially applies odd-numbered scan signals to odd-numbered gate lines among the gate lines GL, and the signal output unit 130 supplies the data lines DL. ) 4n + 1 column sensing signals are received from the 4n + 1 column data wires and output to the signal processor 160. Thereafter, the signal processor 160 obtains the partial image image by using the applied 4n + 1 column sensing signals, and interpolates the remaining interpolation corresponding to pixels other than odd rows and 4n + 1 columns. After forming a video image, the approximate video image is formed by synthesizing the partial video image and the remaining interpolation video image.

Specific interpolation will be described as an example. First, as shown in FIG. 13, E1, E2, E3, E4, and E5 pixels are sequentially disposed in a first row, which is one row, and E1, E2, E3, E4, and E5 are arranged in a second row adjacent to the first row. Pixels are sequentially arranged, and E1, E2, E3, E4 and E5 pixels are sequentially arranged in a third row adjacent to the second row, and the E1, E5, F1 and F5 pixels form the partial image image. Corresponds to the sensing area.

The signal processor 160 assigns the images of the E2, E3, and E4 pixels as intermediate values between the image of the E1 pixel and the image of the E5 pixel, and supplies the image of the F2, F3, and F4 pixels to the F1 pixel. It is given as intermediate values between the image of and the image of the F5 pixel. In addition, the signal processor 160 may convert the image of the G1 pixels into an intermediate value between the image of the E1 pixel and the image of the F1 pixel, and the image of the G2 pixels between the image of the E2 pixel and the image of the F2 pixel. An intermediate value between the image of the G3 pixels and the image of the E3 pixel and the image of the F3 pixel, and an image of the G4 pixels as the intermediate value between the image of the E4 pixel and the image of the F4 pixel And give an image of the G5 pixels as an intermediate value between the image of the E5 pixel and the image of the F5 pixel. In this case, when the remaining interpolated image image formed by the interpolation does not cover the remaining image image corresponding to all of the pixels other than the odd rows and 4n + 1 columns, the remaining interpolated image image may not be covered. Some of the remaining image images may have the same values as adjacent odd rows and 4n + 1 column image images, or may have predetermined reference values such as white and black.

On the other hand, not the pixels arranged in the odd rows and 4n + 1 columns, odd rows and 4n + 2, odd rows and 4n + 3, odd rows and 4n + 4, even rows and 4n + 1 columns, even rows and 4n + After forming a partial image image using only pixels arranged in any one of 2 columns, even rows and 4n + 3 columns, even rows and 4n + 4 columns, and using the partial image image, the image image is close to the full image image. It is also possible to form an approximate video image corresponding thereto.

FIG. 14 is a diagram for describing a process of extracting an image from some pixels adjacent to each other of the X-ray detector of FIG. 2.

Referring to FIGS. 2 and 14, an image image may be formed using only pixels disposed in some rows adjacent to each other and some columns adjacent to each other among the pixels 110. That is, the scan driver 120 sequentially applies scan signals to gate wires disposed in some rows adjacent to each other among the gate wires GL, and the signal output unit 130 supplies the data wires. The sensing signals applied from the data lines arranged in the adjacent columns of the DL are output to the signal processor 160, and the signal processor 160 outputs the image image by using the sensed signals. Can be formed. Meanwhile, an image image may be formed using only pixels in some rows adjacent to each other or pixels in some columns adjacent to each other.

Hereinafter, the method of driving the above-described X-ray detector in the video recording mode will be described briefly.

First, some of the pixels 110 for selecting an image are selected. For example, the pixels corresponding to any one of FIGS. 3 to 9 may be selected among the pixels. This selection may be made manually by an operator or automatically by any program. In this case, the external control signal for the pixel selection may be provided to the detector controller 150 to control the detector controller 150.

Subsequently, scan signals are sequentially applied to each of the gate lines electrically connected to the selected pixels of the gate lines GL. That is, the detector controller 150 sequentially applies the scan signals to each of the selected gate lines in response to the external control signal.

Subsequently, sensing signals are output from each of the data lines electrically connected to the selected pixels of the data lines DL. That is, the detector controller 150 controls the signal output unit 130 to receive the sensing signals from each of the selected data lines and output them to the signal processor 160 in response to the external control signal.

Subsequently, after forming some image images of the selected pixels using the sensing signals, an approximate image image is formed through interpolation of the partial image images. That is, the signal processing unit 160 receives the sensing signals from the signal output unit 130 to obtain some image images of the selected pixels, and in the pixels other than the selected pixels through the interpolation method. After forming the remaining interpolation video image, the partial video image and the remaining interpolation video image are synthesized to form the approximate video image. In this case, the approximate video image refers to an approximate image corresponding to the complete video image in every pixel.

On the other hand, if the remaining interpolated video image does not cover the remaining video image corresponding to all of the pixels other than the selected pixels, a part of the remaining video image that the remaining interpolated video image does not cover includes an image of an adjacent pixel. It may have the same value or may have a reference value such as white or black.

As described above, according to the present embodiment, only some of the pixels 110 are selected to form an image image, thereby increasing the frame frequency of the video when the X-ray detector 100 is operated in the video recording mode. As a result, high speed video can be taken. That is, the smaller the number of the pixels, the smaller the data size of the video image and the processing speed of one frame of the signal output unit increases, the X-ray detector can perform high-speed video recording with a relatively high frame frequency have.

In the detailed description of the present invention described above with reference to the preferred embodiments of the present invention, those skilled in the art or those skilled in the art having ordinary skill in the art will be described in the claims to be described later It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

10: subject 100: X-ray detector
GL: Gate wiring DL: Data wiring
BL: bias wiring 110: pixel
120: scan driver 130: signal output unit
140: bias unit 150: detector control unit
200: x-ray generator 300: display device

Claims (13)

The present invention relates to an X-ray detector that can be driven in any one of a still image shooting mode and a video shooting mode.
M gate wires extending in parallel with each other along the first direction, provided that M is an integer of 2 or more;
N data wires extending in parallel with each other along a second direction crossing the first direction, wherein N is an integer of 2 or more;
The gate lines and the data lines are arranged in a matrix form in an M row and N columns so as to correspond to points crossing each other, and are electrically connected to the gate lines and the data lines, respectively, and directly sense X-rays or the X-rays. A plurality of pixels for sensing the light converted by the plurality of pixels to generate sensing signals;
A scan driver electrically connected to the gate lines to provide scan signals to the pixels through the gate lines;
A signal output unit electrically connected to the data wires to receive the sensing signals from the pixels through the data wires when the scan signals are respectively applied to the pixels; And
The scan driver controls the scan driver to select some scan signals from the scan signals and provide them as part of the gate wires in the moving picture capturing mode, or some sensing signals applied from a portion of the data wires among the sensing signals. And a detector controller for controlling the signal output unit to select and output the selected signal. The X-ray detector of claim 1, further comprising a signal processor configured to receive the sensing signals from the signal output unit and perform image processing such as interpolation using the sensed signals. The detector of claim 1, wherein the detector controller
And controlling the scan control unit to provide the partial scan signals to multiples of K of the gate lines, wherein K is an integer of 2 or more. The detector of claim 1 or 3, wherein the detector controller
And controlling the signal output unit to output some of the sensing signals applied from the multiples of L of the data wires (where L is an integer of 2 or more). The detector of claim 1, wherein the detector controller
And controlling the scan control unit to provide the partial scan signals to I wires arranged adjacent to each other of the gate wires, wherein I is an integer smaller than M and an integer of 2 or more. The detector of claim 1 or 5, wherein the detector controller
And controlling the signal output unit to output some of the sensing signals applied from the J wires disposed adjacent to each other among the data wires (where J is an integer smaller than N and equal to or greater than 2). The semiconductor device of claim 1, further comprising: bias lines extending in parallel to each other along the first direction or the second direction and electrically connected to the pixels, respectively; And
And a bias unit electrically connected to the bias lines and configured to provide bias voltages to the pixels, respectively, for driving the pixels through the bias lines. A method of driving an X-ray detector including M gate lines and N data lines arranged to cross each other, and a plurality of pixels arranged in M rows and N columns and electrically connected to the gate lines and the data lines, respectively. (Wherein M and N are integers of 2 or more),
Selecting some of the pixels for pixel formation;
Applying a scan signal to each of some of the gate lines electrically connected to the selected pixels of the gate lines; And
And outputting a sensing signal from each of some data wires electrically connected to the selected pixels of the data wires. The method of claim 8, further comprising: forming a partial image image corresponding to the selected pixels by using sensing signals applied from the data lines; And
And performing an interpolation of the partial image image to form an approximate image image that is close to the full image image corresponding to all of the pixels. The method of claim 8, wherein the selected pixels
A method of driving an X-ray detector, wherein K is an integer greater than or equal to 2, wherein the pixels are arranged in a row of a multiple of K of the pixels. The method of claim 8 or 10, wherein the selected pixels
A method of driving an X-ray detector, wherein L is an integer of 2 or more, wherein the pixels are arranged in a column of a multiple of L of the pixels. The method of claim 8, wherein the selected pixels
A method of driving an X-ray detector, wherein I is an integer smaller than M and equal to or greater than 2, wherein the pixels are arranged in I rows disposed adjacent to each other. The method of claim 8 or 12, wherein the selected pixels
A method of driving an X-ray detector, wherein J is an integer smaller than N and equal to or greater than 2, wherein the pixels are arranged in J columns disposed adjacent to each other.

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