JPH044661A - Photoelectric converter - Google Patents

Abstract

PURPOSE:To control the photoelectric conversion and the output operation at a frequency set respectively optionally by controlling a signal width of a trigger signal inputted to a drive signal generating means to vary a clock signal inputted to a scanning means independently. CONSTITUTION:With a trigger signal phiTR and a basic operation clock signal phiCLK inputted, a counter 5 counts a clock number of the basic operation clock signal phiCLK while the trigger signal phiTR is at an H level, and a clock signal phiCLK' is generated based on the information. The basic operation clock signal phiCLK is inputted to a drive signal generating circuit 1, and reset signals phiA, phiB and a start signal phiST of a scanning circuit 2 are generated. The clock signal phiCLK is inputted to the scanning circuit 2. The frequency of the basic operation clock signal phiCLK is set independently of a change in the signal width T of the trigger signal phiTR and the clock signal phiCLK' is optionally set by controlling the signal width T of the trigger signal phiTR.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a photoelectric conversion device, and particularly to a photoelectric conversion sensor section having a plurality of photoelectric conversion sensors, and control for photoelectric conversion operation of the photoelectric conversion sensor section. The present invention relates to a photoelectric conversion device having a drive signal generating means for outputting a signal, and a scanning means for outputting a control signal for outputting a photoelectrically converted signal from the photoelectric conversion sensor section.

[Prior Art] Some photoelectric conversion devices require a reset operation for each pixel because charges remain in each pixel.

FIG. 3 is an equivalent circuit diagram showing one sensor pixel of the photoelectric conversion device, and FIG. 4 is a circuit configuration diagram of the photoelectric conversion device.

As shown in FIG. 3, the -sensor pixel includes a bipolar photoelectric conversion sensor Tr, a storage capacitor Ct that accumulates signals from the photoelectric conversion sensor Tr, and an MO3 that resets the base region and emitter region of the photoelectric conversion sensor Tr, respectively.
Type transistor M+.

M2, a MOS type transistor M3 that transfers and resets charges to the storage capacitor Ca, and an output MO3 transistor M4 that outputs the charges accumulated in the storage capacitor C7. φIcAN is a scanning signal for output MOS transistor M4, φ□, φνR
m, φA are MO3 type transistors M,,M,,M
This is a driving and resetting signal for .

In FIG. 4, the sensor pixels are arranged in the sensor pixel column 3, and the drive and reset signal φal is generated by the reset signals φ, , φ6 from the drive signal generation circuit 1.
+, φV11! +φd is generated. The scanning signal φ*C□ is generated by the scanning circuit 2. The drive signal generation circuit 1 receives a trigger signal φi and a basic operation clock signal φC.
The scanning circuit 2 operates according to the basic operation clock signal φe and the start signal φ3. Signals from the sensor pixel array 3 are output through an output circuit 4.

[Problems to be Solved by the Invention] However, in the above photoelectric conversion device, for example,
In order to increase the signal output frequency, if the frequency of the basic operation clock signal φCLK is increased, the drive and reset coarse signal φB8. Since φv, φa are also uniformly shortened and become shorter than a predetermined reset time, there is a problem in that they have a serious effect on optical and electrical characteristics.

[Means for Solving the Problems] A photoelectric conversion device of the present invention includes a photoelectric conversion sensor unit having a plurality of photoelectric conversion sensors, and a drive signal generation unit that outputs a control signal for the photoelectric conversion operation of the photoelectric conversion sensor unit. and a scanning means for outputting a control signal for outputting a photoelectrically converted signal from the photoelectric conversion sensor section, the photoelectric conversion device comprising: controlling a signal width of a trigger signal input to the drive signal generating means; By doing so, the frequency of the clock signal input to the scanning means is changed.

[Function] The photoelectric conversion device of the present invention changes the frequency of the clock signal input to the scanning means by controlling the signal width of the trigger signal input to the drive signal generation means, thereby achieving the following effects: The photoelectric conversion operation such as storage operation and reset operation, and the output operation of outputting a photoelectrically converted signal from the photoelectric conversion sensor section can be individually controlled at arbitrarily settable frequencies.

[Example] Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic configuration diagram of an embodiment of a photoelectric conversion device of the present invention, and FIG. 2 is a timing chart for explaining the operation of this photoelectric conversion device.

Components that are the same as those shown in FIG. 4 are designated by the same reference numerals and their explanations will be omitted.

The structure of the sensor pixel of the photoelectric conversion device of this example is the same as the sensor pixel described using FIG. 3.

As shown in FIG. 1, first, the trigger signal φA8 and the basic operation clock signal φ. When LX is input, counter 5
, the trigger signal φA is at H level (the circuit of this embodiment uses positive logic in which "1" is set to H level and "0" is set to L level, but even if a circuit using negative logic is used) good.

) in the basic operation clock signal φCLX is counted, and based on this information, the clock signal φ. stomach '
is generated. The basic operation clock signal φeLX is input to the drive signal generation circuit 1, and the reset signals φ, φ8 and the start signal φ8T of the scanning circuit 2 are generated. The clock signal φCLX' is input to the scanning circuit 2.

The frequency of the basic operation clock signal φCLX is the trigger signal φ
The clock signal φCLX' is set regardless of the change in the signal width T (width of the section in which the trigger signal φT6 is at H level) in A, and as described above, the clock signal φCLX' can be set arbitrarily by controlling the signal width T of the trigger signal φ□8. It is possible. As a result, the scanning signal φl generated based on the clock signal φCLK'
The frequency of 1cAN is determined by the drive and reset signal φli φ generated based on the basic operation clock signal φCLK.
It can be arbitrarily set independently of the frequency of V*S + φ7.

[Effects of the Invention] As described in detail above, according to the photoelectric conversion device of the present invention, the photoelectric conversion operations such as the storage operation and the set operation of the photoelectric conversion sensor section, and each photoelectric conversion sensor of the photoelectric conversion sensor section The output operation of outputting a photoelectrically converted signal can be individually controlled at a frequency that can be set arbitrarily.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an embodiment of a photoelectric conversion device of the present invention. FIG. 2 is a timing chart for explaining the operation of this photoelectric conversion device. FIG. 3 is an equivalent circuit diagram showing one sensor pixel of the photoelectric conversion device. FIG. 4 is a schematic configuration diagram of a photoelectric conversion device. 1: Drive signal generation circuit, 2: Scanning circuit, 3: Sensor pixel column, 4: Output circuit, 5: Counter, Tr: Photoelectric conversion sensor, CT: Storage capacitor, M, , M,, Ms,
M,: MO3 type transistor, φ5CAN: MO3O3 type transistor M scanning signal, φ,, φV□, φA: MO3 type transistor M
,,M2. M, drive and reset signal, φ. ,φB
: Reset signal, φBR+ φV! +! +φa
: Drive and reset signal, φTR: Trigger signal, φ. , : Basic operation clock signal, φs = start signal, φ
CLK': Clock signal. Agent Patent Attorney Sekihei Yamashita

Claims (1)

[Claims] (1) A photoelectric conversion sensor section having a plurality of photoelectric conversion sensors, a drive signal generating means for outputting a control signal for the photoelectric conversion operation of the photoelectric conversion sensor section, and a signal photoelectrically converted from the photoelectric conversion sensor section. In a photoelectric conversion device having a scanning means for outputting a control signal for outputting a clock signal, by controlling the signal width of a trigger signal inputted to the drive signal generation means, the clock signal inputted to the scanning means is controlled. A photoelectric conversion device characterized by changing frequency.