KR100267246B1 - Driving control apparatus of charge coupled device - Google Patents

Abstract

PURPOSE: A driving control device of a photoelectric conversion sensor is provided to improve an adaptability by needing not to change a driving circuit corresponding to a kind of the photoelectric conversion sensor and a manufacturing company. CONSTITUTION: A driving control device of a photoelectric conversion sensor includes an exposure interval starting point decision part(100), a shifting interval start point decision part(110), a shifting interval end point decision part(120), an exposure interval end point decision part(130). The exposure interval starting point decision part(100) decides a start point of an exposure interval by counting a main clock(201) of a system. At this time, the start point of the exposure interval is a valid interval of an exposure signal about one a sub-scanning line. The shifting interval start point decision part(110) decides a start point of a shifting interval by counting the main clock(201). At this time, the start point of the shifting interval is a valid interval of a shift signal for shifting an output of the photoelectric conversion sensor to an analog shift register. The shifting interval end point decision part(120) decides an end point of the shifting interval by counting the main clock(201). The exposure interval end point decision part(130) decides an end point of the exposure interval by counting a main clock(201).

Description

Driving control device for photoelectric conversion sensor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive control apparatus for a photoelectric conversion sensor that outputs a signal of an original image as an analog signal by photoelectric conversion. The present invention relates to a drive signal generator of a photoelectric conversion sensor that can be applied to various manufacturing specifications.

The photoelectric conversion sensor refers to a charge coupled division (CCD), and may also be referred to as a charge coupled device, a photoelectric conversion sensor, or the like.

The system using a photoelectric conversion sensor includes a digital still camera (DSC), a movie camera, a TV camera, a camcorder, a gray level / color scanner, The system is representative such as a digital copyer, a multi-function peripheral (MFP), and the like.

In particular, among such systems, an image scanning device such as a gradation / color scanner, which is popular in affinity, is used for scanning (i.e., reading) printed text, photographs, memos or letters in the form of human hands. The most common means are essential components such as multifunction devices, document translators, computers for CAD (Computer Aided Design), facsimiles, character recognizers, and digital copiers, where photoelectric conversion sensors become the decisive component of system performance. have.

In recent years, as office electronics, which is at the crossroads of development, is rapidly increasing in demand for office automation equipment such as digital copiers, printers, scanners, and facsimile machines, each office automation device has been developed to expand its own functions. It is being developed with high performance. In addition, each office automation device used independently has been developed in one piece, which reduces the economic burden and installation space for the user, and at the same time produces and provides a product that performs a complex document output function. Such a device is called "Multi-Function Peripheral" (MFP), and today, a multifunction device is a typical application of a device employing an image scanning device such as a scanner.

On the other hand, the driving clock generation circuit of the photoelectric conversion sensor, which is a key component of such systems, is generally provided as a circuit for timing control when the evaluation board is manufactured by the sensor manufacturer.

Commercially available photoelectric conversion sensors generally have a control signal type or control signal for a drive signal that outputs charges accumulated in proportion to the density of an original image according to various functions or characteristics, as drive frequencies vary according to products of respective manufacturers. Specifications related to the drive time of the is different. As described above, the manufacturer of the photoelectric change sensor provides a driving condition and an evaluation board for the current product. When the photoelectric conversion sensor is changed when the product using the photoelectric conversion sensor is designed and manufactured, the driving according to the photoelectric conversion sensor is performed. The signal generation circuit must also be changed.

In other words, according to the photoelectric conversion sensor of each manufacturer, the exposure section tINT, the shifting section of the analog shift register, the time interval between the operating points of the analog shift register at the exposure point, and the shifting section tSH, which is the operating section of the analog shift register. In many cases, the setting value of the section between the end point of the shifting section and the end point of the exposure section (tINT) is different, and the waveform of the signal for moving the signal of the analog shift register to the output terminal is also different. Since the timing is different, the uniform control specification cannot be applied to the photoelectric conversion sensor driver.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it is possible to provide a driving circuit of a photoelectric conversion sensor that can appropriately respond to any photoelectric conversion sensor without changing the driving circuit according to the type or photoelectric conversion sensor. It is an object of the present invention to provide a drive control apparatus for a photoelectric conversion sensor.

1 is a block diagram showing an embodiment of a general image scanning apparatus;

2 is a block diagram showing a preferred embodiment of a drive control apparatus for a photoelectric conversion sensor according to the present invention;

3 is a timing diagram showing a control signal waveform and an output signal of a photoelectric conversion sensor;

4 is a waveform diagram showing in detail a specific section of the shifting signal, the first output control signal, and the second output control signal shown in FIG. 3;

5 is a flowchart showing a preferred embodiment of a drive control method of a photoelectric conversion sensor according to the present invention;

FIG. 6 is a waveform diagram showing timing for main parts of a preferred embodiment of a drive control apparatus for a photoelectric conversion sensor according to the present invention shown in FIG. 2;

7 is a block diagram for generating other output control signals;

8 is a block diagram illustrating a control signal generator using control data.

<Description of the code | symbol about the principal part of drawing>

100: exposure section timing determination unit 101: exposure coefficient unit

102: exposure signal output unit 110: shifting section timing determination unit

111: first AND logic operation unit 112: first coefficient unit

113: first latch portion 114: first comparison portion

115: first flip-flop unit 120: shifting section end point determination unit

121: second and logical operation unit 122: second coefficient unit

123: second latch portion 124: second comparison portion

125: second flip-flop unit 130: exposure section end point determination unit

131: third and logical operation unit 132: third coefficient unit

133: third latch portion 134: third comparison portion

140: clock divider 150: first output control signal generator

151: ora logic operation unit 152: first selection unit

160: second output control signal generator 161: invert calculator

162: Noah logic operation unit 163: second selection unit

The driving control apparatus of the photoelectric conversion sensor according to the present invention for achieving the object of the present invention, the output of the photoelectric conversion sensor accumulated by the photoelectric conversion of the optical density of the original through the analog shift register (analogue shift register) A drive control apparatus for a photoelectric conversion sensor, comprising: an exposure period time determining unit configured to count a main clock of a system to determine a time point of an exposure period that is an effective period of an exposure signal for a sub-scan line; Determining the start point of the shifting section, which is an effective section of the shift signal for moving the output of the photoelectric conversion sensor to the analog shift register by counting the main clock as the start point of the exposure section is determined by the exposure section timing determining unit. A shifting section timing determiner; A shifting section endpoint determining unit configured to determine an end point of the shifting section by counting the main clock as the shifting section timing determiner determines a time point of the shifting section; And an exposure section end point determining unit configured to determine the end point of the exposure section by counting the main clock as the end point of the shifting section is determined by the shifting section end point determiner.

Hereinafter, an image scanning apparatus will be described as an example of a configuration of a system to which a preferred embodiment of a drive control apparatus for a photoelectric conversion sensor according to the present invention can be applied to help the understanding of the present disclosure.

1 is a block diagram illustrating an embodiment of a general image scanning apparatus.

One embodiment of a general image scanning apparatus is an image scanning apparatus for converting and transmitting an optical density of an original into digitized image data, as shown in FIG. 1: generating a timing signal for performing a series of scanning operations; A scanning control unit 1 which governs the operation of the entire system; A ROM (2) for storing the program and the reference data having a certain flow so that the scanning control unit (1) can control the scanning system in a predetermined order; A RAM (3) for storing temporary data generated while the scanning control unit controls the system; A lamp 12 for outputting tricolor light of red, green, and blue to read the image information of the original with the amount of reflected light; A lamp driver 13 for turning on / off the lamp 12 by receiving a control signal from the scanning controller 1 at an appropriate time to drive the lamp 12; An optical module unit (10) for reflecting the tricolor light output from the lamp (12) to an original to perform color separation filtering to form an optical path to be incident on a photoelectric conversion sensor corresponding to each color component; A step motor unit (11) which operates by receiving a drive signal from the scanning control unit (1) to move the optical module unit (10) in the sub-scanning direction of the original at a predetermined resolution; Photoelectric conversion sensor 20 for photoelectric conversion of the color information of each of the three primary colors of blue (B), green (G) red (R) in proportion to the amount of light input through the optical module unit 10 into an electrical analog signal ; A red analog buffer unit 30a, a green analog buffer unit 30b, and a blue analog buffer unit 30c are provided to transfer the analog image signal obtained by each photoelectric conversion sensor to the rear end of the photoelectric conversion sensor 20 and An analog buffer unit 30 for buffering the analog image signal from being distorted by the circuit; A 3: 1 multiplexer 45 for selectively outputting an analog image signal of each color component input from the analog buffer unit 30 according to a signal supplied from the scanning control unit 1; An analog switch 41 for selecting an amplification degree suitable for an analog image signal of each color component output from the 3: 1 multiplexer 45; A signal amplifying unit 42 for receiving the low voltage analog image signal output from the analog buffer unit 45 and amplifying the analog image signal at an amplification selected by the analog switch 41 so as to be processed by a circuit of a subsequent stage; A preprocessing unit (50) which receives the output of the signal amplifying unit (42), performs black and white correction processing, and converts the analog-digital conversion into digital image data; A memory buffer unit 60 for buffering the output of the preprocessor unit 50; And an interface unit 70 for transmitting the image data stored in the memory buffer unit 60 to the host computer in accordance with a predetermined transmission standard.

The configuration of an embodiment of a system to which the present invention can be applied to help understand the present invention has been described. Hereinafter, a preferred embodiment of a drive control apparatus for a photoelectric conversion sensor according to the present invention will be described with reference to FIG. 2. The description is as follows.

2 is a block diagram showing a preferred embodiment of a drive control apparatus for a photoelectric conversion sensor according to the present invention.

According to a preferred embodiment of the drive control apparatus of the photoelectric conversion sensor according to the present invention, as shown in FIG. 1, the output of the photoelectric conversion sensor accumulated by photoelectric conversion of the optical density of the original is stored through an analog shift register. In the drive control apparatus of the photoelectric conversion sensor for outputting, the main clock 201 of the system is counted to determine the start point of the exposure section tINT, which is an effective section of the exposure signal? INT for one sub-scanning line. An exposure section viewpoint determining unit 100;

The shift signal Φ SH for counting the main clock 201 and shifting the output of the photoelectric conversion sensor to the analog shift register as the viewpoint of the exposure period tINT is determined by the exposure period timing determiner 100. A shifting period time determining unit 110 that determines a starting point of the shifting period tSH, which is an effective period of the power supply;

The shifting section endpoint determining unit 120 determines the end point of the shifting section tSH by counting the main clock 201 as the shifting section timing determiner 110 determines the starting point of the shifting section tSH. ); And

As the end point of the shifting section tSH is determined by the shifting section endpoint determining unit 120, an exposure section end point determining unit 130 for determining the end point of the exposure section tINT by counting the main clock 201. It is composed of

Here, the exposure interval time determination unit 100 includes an exposure coefficient unit 101 for outputting a high state when the number of times the main clock is counted equal to the exposure coefficient value received through the data bus 202; And receiving the output of the high state of the output of the exposure coefficient unit 101 to generate the exposure signal ΦINT, and the exposure according to the determination of the end point of the exposure period tINT of the exposure period end point determiner 130. The exposure signal output unit 102 terminates the signal? INT.

In this case, the exposure counting unit 101 uses an overflow as an output signal by up-counting the main clock from a count value obtained by subtracting the exposure count value from a maximum count value.

The shifting period timing determiner 110 may include a first AND logic operation unit 111 for performing an AND logic operation on the output of the exposure signal output unit 102 and the main clock 201; A first counting unit (112) for counting the output of the first AND logic calculating unit (111) and outputting a first count value; A first latch unit 113 for storing a first reference coefficient value received through the data bus 202 to determine a time point of the shifting interval; A first comparing unit 114 comparing the first counting value with the first reference counting value and outputting a high state if the first counting value is the same; And a first flip-flop unit 115 that generates the shifting signal Φ SH in response to receiving an output of the high state of the first comparator 114.

The shifting end point determining unit 120 receives an output of the exposure signal output unit 102 and an output of the main clock 201 and the first flip-flop unit 115 to perform an AND logic operation. Logic operation unit 121; A second counting unit 122 for counting an output of the second AND logic calculating unit 121 and outputting a second counting value; A second latch unit 123 for storing a second reference coefficient value received through the data bus 202 to determine an end point of the shifting interval; A second comparison unit 124 for resetting the first flip-flop unit 115 and the second counting unit 122 according to the comparison of the first counting value and the second reference counting value and outputting a high state ); And a second flip-flop unit 125 which terminates the shifting signal Φ SH in response to receiving the high state output of the second comparator 124.

The exposure period end point determiner 130 receives and outputs the output of the exposure signal output unit 102 and the outputs of the main clock 201 and the second flip-flop unit 125. An end logic operation unit 131; A third counting unit (132) for counting an output of the third and logic calculating unit (131) to output a third counting value; A third latch unit 133 for storing a third reference count value received through the data bus 202 to determine an end point of the exposure period tINT; The exposure period may be reset by resetting the second flip-flop unit 125, the third counting unit 132, and the exposure signal output unit 102 if the first counting value is equal to the third reference counting value. and a third comparison unit 134 for determining the end point of tINT.

On the other hand, a preferred embodiment of the drive control device of the photoelectric conversion sensor according to the present invention, generates an output control signal for sequentially outputting the signal recorded in the analog shift register through the output terminal corresponding to the type of the photoelectric conversion sensor To this end, the clock divider 140 for dividing the main clock by a predetermined division unit; Photoelectric conversion sensor type selection signal of the logic operation result of the OR operation and the output of the clock division unit 140 and the output of the exposure signal output unit 102 and the output of the clock division unit 140 A first output control signal generator 150 selectively outputting the second output control signal; And an operation of performing an invert logic operation on a logic operation result obtained by performing a logic operation on the output of the clock division unit 140 and the output of the exposure signal output unit 102 and the output of the clock division unit 140. It is preferable to further include a second output control signal generator 160 for selectively outputting a result according to the photoelectric conversion sensor type selection signal.

Here, the first output control signal generator 150 may include an ora logic operation unit 151 for performing an OR operation on the output of the clock divider 140 and the output of the exposure signal output unit 102; And a first selector 152 selectively outputting an output of the OR logic operation unit 140 and an output of the clock divider 140 according to a photoelectric conversion sensor type selection signal.

In addition, the second output control signal generator 160 may include an invert calculator 161 for inverting logic output of the clock divider 140; A noah logic calculation unit (162) for noah logic operation on the output of the clock division unit (140) and the output of the exposure signal output unit (102); And a second selector 163 for selectively outputting the output of the invert calculator 161 and the output of the NOR logic calculator 162 according to the photoelectric conversion sensor type selection signal.

Hereinafter, the operation of the preferred embodiment of the drive control apparatus of the photoelectric conversion sensor according to the present invention configured as described above will be described with reference to the accompanying drawings.

3 is a timing diagram showing a control signal waveform and an output signal of the photoelectric conversion sensor.

FIG. 3A shows the exposure section tINT, which is an effective section of the exposure signal? INT for one sub-scanning line, and the shifting signal? SH for moving the analog image signal accumulated in the photoelectric conversion sensor to the analog shift register. The shifting period tSH, which is an effective period of, is shown, and FIGS. 3B and 3C show a first output control signal .phi. 1 for sequentially outputting signals of an analog shift register through an output terminal. And a second output control signal .phi.2. 3 (d) shows a reset signal for receiving the next signal after outputting the signal through the output stage of the analog shift register, and FIG. 3 (e) shows the original image output through the output stage. A photoelectric conversion output signal (i.e., an analog image signal) proportional to the density is shown.

FIG. 4 illustrates in detail the specific sections of the shifting signal .phi.SH, the first output control signal .phi.1, and the second output control signal.phi.2 shown in FIG.

4A illustrates the shifting signal ΦSH, FIG. 4B illustrates the first output control signal Φ1, and FIG. 4C illustrates the second output control signal Φ2 in detail. Here, t1 is a period from the start point of the exposure section tINT to the start point of the shifting section tSH, t2 is a shifting section, and t3 is an end point of the exposure section tINT from the end point of the shifting section tSH. It shows the interval up to.

As can be seen in FIG. 3, the driving of the photoelectric conversion sensor repeatedly applies a signal at a predetermined time interval called an exposure period tINT to photoelectrically convert and read the density distribution of the original image. At this time, as an important factor that determines the performance of the photoelectric conversion sensor, reading a signal at regular time intervals under constant illumination is a requirement for faithful reading of the original image.

5 is a flowchart illustrating a preferred embodiment of a drive control method of a photoelectric conversion sensor according to the present invention.

First, after selecting the type of the photoelectric conversion sensor in the power-on state, the exposure coefficient value is loaded into the exposure coefficient unit 101 through the data bus 202. (S10, S20)

Thereafter, a first reference count value of the first latch unit 113 is set through the data bus 202 to determine a start point of the shifting section, and the data bus 202 is used to determine an end point of the shifting section. Set a second reference count value of the second latch unit 123, and determine a third end point of the exposure period tINT through the data bus 202. Set the reference count value (S30, S40, S50).

Accordingly, the exposure period timing determiner 100 determines the timing of the exposure period tINT of the exposure signal? INT for one sub-scan line by counting the main clock 201 of the system. The exposure counting unit 101 of the exposure period timing determiner 100 determines whether the number of times the main clock is counted is equal to the exposure count value received through the data bus 202, and counts the main clock. When the number of times is equal to the exposure coefficient value, when the high state is output, the exposure signal output unit 102 receives the output of the high state of the output of the exposure coefficient unit 101 and generates the exposure signal Φ INT. S70, S80)

At this time, the exposure coefficient unit 101 up-counts the main clock from the count value C _start obtained by subtracting the exposure coefficient value C _ref from the maximum count value C _max , as shown in Equation (1). counting), the overflow is used as the high output signal. Here, the exposure coefficient value C _ref is a value obtained by dividing the exposure period tINT by the frequency of the main clock.

C _start = C _max -C _ref

From the point in time at which the exposure period tINT is determined by the exposure period timing determiner 100, the shifting period timing determiner 110 counts the main clock 201 to output the analog output of the photoelectric conversion sensor. The time point of the shifting section tSH of the shift signal .phi.SH for moving to the shift register is determined. (S90, S100)

In more detail, first, the first AND logic operation unit 111 of the shifting interval timing determiner 110 is configured to output the exposure signal output unit 102 and the main clock (the shifting interval timing determination unit 110). When the AND logic operation is received, the first counting unit 112 counts the output of the first AND logic calculating unit 111 and outputs a first counting value. 114 compares the first counting value with the first reference counting value and outputs a high state if it is the same. Thereafter, the first flip-flop unit 115 generates the shifting signal Φ SH as the input of the high state of the first comparator 114 is input.

As the starting point of the shifting section tSH is determined by the shifting section timing determiner 110, the shifting section end point determining unit 120 counts the main clock 201 to determine an end point of the shifting section tSH. In this case, the second AND logic operator 121 of the shifting interval end point determiner 120 outputs the exposure signal output unit 102, the main clock 201, and the first flip-flop unit 115. And input logic output is AND logic operation. Accordingly, the second counting unit 122 counts the output of the second AND logic calculating unit 121 and outputs a second counting value. Thereafter, the second comparison unit 124 compares the first coefficient value and the second reference coefficient value and outputs a high state when the first coefficient value is equal to the first coefficient value. ) Is reset and the output thereof is input to the second flip-flop unit 125. The second flip-flop unit 125 terminates the shifting signal .phi.SH when the second flip-flop unit 125 receives the output of the high state of the second comparator 124. (S110, S120)

As the end point of the shifting section tSH is determined by the shifting section ending point determiner 120, an exposure section ending point determiner 130 counts the main clock 201 to determine an end point of the exposure section tINT. (S130, S140)

In more detail, first, the third AND logic operation unit 131 of the exposure period end point determiner 130 outputs the exposure signal output unit 102, the main clock 201, and the second flip-flop. When the AND logic operation is received with the output of the unit 125, the third counting unit 132 counts the output of the third AND logic calculating unit 131 to output a third coefficient value, and the third comparison unit 134. ) Compares the first counting value with the third reference counting value and resets the second flip-flop part 125, the third counting part 132, and the exposure signal output part 102 if the same is equal. The end point of the exposure section tINT is determined.

In this case, the exposure signal output unit 102, the second flip-flop unit 125, and the flip-flop unit 174 may be configured as a D-flip flop.

On the other hand, a preferred embodiment of the drive control apparatus of the photoelectric conversion sensor according to the present invention, the output control signal (Φ1, Φ2) for outputting the signal recorded in the analog shift register corresponding to the type of the photoelectric conversion sensor selectively It further includes an output control signal generator 140, 150, 160 generated by.

In more detail, first, the clock division unit 140 divides the main clock into predetermined division units, and normally sets the predetermined division unit to four divisions.

Accordingly, the first output control signal generator 150 performs an OR logic operation on the output of the clock division unit 140 and the output of the exposure signal output unit 102 and the clock. The output of the divider 140 is selectively output Φ1A and Φ1B according to the photoelectric conversion sensor type selection signal, and the second output control signal generator 160 outputs the clock divider 140 and the exposure signal. Selectively outputs the logic operation result of the output operation of the output unit 102 and the operation result of the invert logic operation of the output of the clock division unit 140 according to the photoelectric conversion sensor type selection signal. (Φ2A, Φ2B).

FIG. 6 is a waveform diagram showing timing for main parts of a preferred embodiment of a drive control apparatus for a photoelectric conversion sensor according to the present invention shown in FIG.

FIG. 6A shows an exposure signal Φ INT for one sub-scan line, and FIG. 6B shows a shift signal Φ SH for moving an analog image signal accumulated in a photoelectric conversion sensor to an analog shift register. ).

Meanwhile, as described above, according to the type of the photoelectric conversion sensor, as shown in FIGS. 6C and 6D, the first output control signal .phi.1A is in a high state while the exposure signal .phi.INT is in a high state. And the second output control signal .phi.2A becomes an inverted signal of the first output control signal .phi.1A. As shown in FIGS. 6E and 6F, the exposure signal. Irrespective of this, there is a type that uses the output of the clock divider 140 as the first output control signal .phi.1B and the inverted output of the clock divider 140 as the second output control signal .phi.1B. By applying a selection signal to the first selector 152 and the second selector 163 through the photoelectric conversion sensor type signal, an output control signal according to the type of the photoelectric conversion sensor may be generated.

For example, when the photoelectric conversion sensor type signal (i.e., the selection signal SEL, 203) is 0, the Φ1A signal is selected as the first output control signal Φ1 and the Φ2A signal is selected as the second output control signal Φ2, respectively. When the photoelectric conversion sensor type signal 203 is 1, Φ1B signal is selected as the first output control signal Φ1 and Φ2B signal is selected as the second output control signal Φ2, respectively.

Meanwhile, in order to drive the photoelectric conversion sensor, in addition to the control signals described above, a reset signal Φ RS which is a reference voltage setting signal of an output terminal for each pixel, and an output signal of each cell are sampled and held. The case where a sample and hold signal (Φ LH) and the like are controlled to be output through the following description will be described.

7 is a block diagram for generating other output control signals.

For example, as shown in FIG. 7, a control such as FIG. 7B, FIG. 7C, and FIG. 7D with respect to the first output control signal .phi.1 as shown in FIG. 7A. If the output of the signal is necessary, each signal is divided into eight steps for one period of the first output control signal .phi.1, and each output state is converted into eight bits of control data as shown in FIG. . This control data is stored in a predetermined ROM, and can be referred to and used as needed.

8 is a block diagram illustrating a control signal generator 170 using control data.

The control data is stored in the control data latch unit 171 through the data bus 202, and the clock counter 172 counts the main clock 201 to generate a selection signal.

Accordingly, the parallel / serial selector 173 controls the control data inputted from the control data latcher 171 according to the selection signal output from the clock counter 172. The flip-flop unit 174, which is selected and output by each unit and receives the output of the parallel / serial selection unit 173, is sampled according to the main clock to generate an output, and the signal delay unit 175 generates a first output control signal ( In order to synchronize with Φ1), the output of the flip-flop unit 174 is input and delayed for a predetermined time.

Here, the control data is composed of 8 bits. Accordingly, the clock counter 172 preferably uses the 8-bit counter and the parallel / serial selector 173 as the parallel / serial selector 173.

The present invention may include a plurality of control signal generator 170 as shown in Figure 8 according to the number of output control signals.

Meanwhile, the scanning control unit 1 of FIG. 1 may include the first latch unit 113, the second latch unit 123, and the second latch unit 123 based on predetermined data before the control signal of the photoelectric conversion sensor is output. By setting the data necessary for the control data latch unit 171, the operation can be performed smoothly.

Terminologies used herein are terms defined in consideration of functions in the present invention, which may vary according to the intention or customs of those skilled in the art, and the definitions should be made based on the contents throughout the present application. will be.

In addition, since the present invention has been described through the preferred embodiment of the present invention, in view of the technical difficulty aspects of the present invention, those having ordinary skill in the art can easily be different from another embodiment of the present invention. Since modifications may be made, it is obvious that both the embodiments and modifications cited in the above description belong to the claims of the present invention.

As described in detail above, in the drive control apparatus of the photoelectric conversion sensor for outputting the output of the photoelectric conversion sensor obtained by photoelectric conversion of the optical density of the original through an analog shift register, the main part of the system An exposure section time determining unit that counts a clock to determine a time point of an exposure section that is an effective section of an exposure signal for one sub-scanning line; Determining the start point of the shifting section, which is an effective section of the shift signal for moving the output of the photoelectric conversion sensor to the analog shift register by counting the main clock as the start point of the exposure section is determined by the exposure section timing determining unit. A shifting section timing determiner; A shifting section endpoint determining unit configured to determine an end point of the shifting section by counting the main clock as the shifting section timing determiner determines a time point of the shifting section; According to the driving control device of the photoelectric conversion sensor is configured to include an exposure section end point determining unit for determining the end point of the exposure section by counting the main clock as the end point of the shifting section is determined by the shifting section end point determining unit. There is an advantage in that it is possible to provide a driving circuit of the photoelectric conversion sensor that can be appropriately responded to any photoelectric conversion sensor without changing the driving circuit according to the type of the conversion sensor or each manufacturer.

Claims (16)

In the drive control apparatus of the photoelectric conversion sensor for outputting the output of the photoelectric conversion sensor accumulated by photoelectric conversion of the optical density of the original through an analog shift register: An exposure period time determining unit that counts a main clock of the system and determines a time point of an exposure period that is an effective period of an exposure signal for one sub-scanning line; Determining the start point of the shifting section, which is an effective section of the shift signal for moving the output of the photoelectric conversion sensor to the analog shift register by counting the main clock as the start point of the exposure section is determined by the exposure section timing determining unit. A shifting section timing determiner; A shifting section endpoint determining unit configured to determine an end point of the shifting section by counting the main clock as the shifting section timing determiner determines a time point of the shifting section; And And an exposure section end point determining unit configured to determine the end point of the exposure section by counting the main clock according to the end point of the shifting section determined by the shifting section end point determiner. The method of claim 1, wherein the exposure period time determination unit, An exposure counting unit for outputting a high state when the number of times the main clock is counted equal to an exposure count value input through a data bus; And And an exposure signal output unit configured to receive the output of the high state of the output of the exposure coefficient unit, generate the exposure signal, and terminate the exposure signal according to the determination of the end point of the exposure period of the exposure period end point determination unit. Drive control device of the conversion sensor. The method of claim 2, wherein the exposure coefficient unit uses an overflow as an output signal by up-counting the main clock from a count value obtained by subtracting the exposure coefficient value from a maximum count value. The drive control device of the photoelectric conversion sensor. The method of claim 3, wherein the exposure coefficient value, And the exposure period is a value obtained by dividing the exposure period by the frequency of the main clock. The method of claim 2, wherein the exposure signal output unit, A drive control device for a photoelectric conversion sensor, characterized in that it is a D-Flip Flip. The apparatus of claim 1, wherein the shifting period timing determiner comprises: A first AND logic operation unit configured to receive an output of the exposure signal output unit and the main clock and perform an AND logic operation; A first counting unit for counting an output of the first AND logic calculating unit to output a first counting value; A first latch unit for storing a first reference coefficient value received through the data bus to determine a time point of the shifting period; A first comparing unit comparing the first counting value with the first reference counting value and outputting a high state if the first counting value is the same; And And a first flip-flop unit configured to generate the shifting signal in response to receiving an output of a high state of the first comparator. The method of claim 6, wherein the first flip-flop portion, A drive control device for a photoelectric conversion sensor, comprising a D-Flip Flip. The shifting end point determining unit of claim 1, wherein A second AND logic operation unit receiving and outputting the output of the exposure signal output unit and the output of the main clock and the first flip-flop unit; A second counting unit counting an output of the second AND logic calculating unit and outputting a second coefficient value; A second latch unit for storing a second reference coefficient value received through the data bus to determine an end point of the shifting interval; A second comparison unit configured to reset the first flip-flop unit and the second coefficient unit as a result of comparing the first coefficient value and the second reference coefficient value and outputting a high state if they are the same; And And a second flip-flop unit which terminates the shifting signal in response to receiving the high state output of the second comparator. The method of claim 7, wherein the second flip-flop portion, A drive control device for a photoelectric conversion sensor, comprising a D-Flip Flip. The method of claim 1, wherein the exposure period end point determination unit, A third AND logic operation unit receiving and outputting the output of the exposure signal output unit and the output of the main clock and the second flip-flop unit; A third counting unit for counting an output of the third AND logic calculating unit and outputting a third coefficient value; A third latch unit configured to store a third reference count value received through the data bus to determine an end point of the exposure period; A third comparison unit configured to determine the end point of the exposure period by comparing the first count value with the third reference count value and resetting the second flip-flop unit, the third counting unit, and the exposure signal output unit if they are the same; Drive control device for a photoelectric conversion sensor, characterized in that the. The method of claim 1, In order to generate an output control signal for sequentially outputting the signal recorded in the analog shift register through an output terminal corresponding to the type of the photoelectric conversion sensor, A clock divider for dividing the main clock in predetermined division units; A first output control signal generator for selectively outputting an OR logic operation by outputting the clock divider and an output of the exposure signal output unit and an output of the clock divider; And A second output control signal for selectively outputting a logic operation result obtained by performing a logic operation on the output of the clock division unit and an output of the exposure signal output unit and an operation result of an invert logic operation on the output of the clock division unit; The drive control device of the photoelectric conversion sensor further comprises a generator. The method of claim 11, wherein the first output control signal generator, An OR logic operation unit performing OR logic operation on an output of the clock divider and an output of the exposure signal output unit; And And a first selector configured to selectively output an output of the OR logic operation unit and an output of the clock divider according to a photoelectric conversion sensor type selection signal. The method of claim 11, wherein the predetermined dispensing unit, The drive control apparatus of the photoelectric conversion sensor characterized by four divisions. The method of claim 11, wherein the second output control signal generator, An invert calculator configured to invert logic the output of the clock divider; A NOR logic operation unit configured to perform a NOR logic operation on an output of the clock divider and an output of the exposure signal output unit; And And a second selector for selectively outputting the output of the invert operator and the output of the NOR logic operator in accordance with the photoelectric conversion sensor type selection signal. The method of claim 1, A control data latch unit for receiving and storing control data indicating a control signal in bit units through the data bus 202; A clock counting unit for counting the main clock to generate a selection signal; A parallel / serial selection unit which selects and outputs the control data input by one bit unit from the control data latch unit according to the selection signal output from the clock counting unit; A flip-flip unit which receives the output of the parallel / serial selection unit and is sampled according to the main clock to generate an output; And And at least one control signal generator, comprising a signal delay unit configured to receive an output of the flip-flop unit and delay the output for a predetermined time to synchronize. 16. The drive control apparatus for a photoelectric conversion sensor according to claim 15, wherein the control data is composed of 8 bits, the clock counting unit is an 8-bit counting unit, and the parallel / serial selection unit is an 8: 1 parallel / serial selection unit. .

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