JPS62296674A - Solid-state image pickup device - Google Patents

Abstract

PURPOSE:To add an automatic convergence function to the titled device by providing a photoelectric conversion part arrayed two dimensionally, a horizontal transfer part, and first and second shift register parts. CONSTITUTION:At a point of time t1, a pulse (a) is outputted from the second shift register 11, and pulses (c) and (d) are supplied to the electrode 3 of the horizontal transfer part(H-CCD) 2. By the level 'H' of a pulse C, signal charges are read out from a photodiode 1. The charges are transferred by pulses (c) and (d) at a time t2 but not outputted. After the lapse of storing time t5, a pulse (b) is outputted from the first shift register 10 at a time t3, while pulses (c) and (d) are applied to the electrode of the H-CCD. By the level 'M' of a pulse (c), signal charges are read out from the photodiode 1 and transfferred and outptted at a time t4. By varying the length of time t5, the storing time for signal charges can be varied, therefore, it is made possible to let an element itself have the convergence function.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention Field of Industrial Application The present invention relates to a solid-state imaging device that can be used in single-chip color cameras, surveillance cameras, and the like.

BACKGROUND OF THE INVENTION In recent years, development of solid-state image sensing devices has progressed, reaching a level where there is no problem in practical use as a home video camera, and commercialization is progressing. The solid-state imaging device is a MOS type.

Development of various systems such as the CCD type has progressed and mass production has begun, and 11 points such as sensitivity, smear, and pluming have been achieved to the point where they are reasonably satisfactory for use in board-type color cameras.

Problems to be Solved by the Invention On the other hand, in order to further reduce the size of cameras, there is a strong demand for an image sensor having an aperture function.

The present invention provides a solid-state imaging device that can have an automatic aperture function that could not be realized with conventional structures.

Means for Solving the Problems In order to solve the above problems, the solid-state imaging device of the present invention includes a photoelectric conversion section and a horizontal transfer section arranged two-dimensionally, a first shift register section and a second shift register section. It consists of a 7-foot register section.

action With this configuration, the diaphragm 31 is attached to the solid-state image sensor itself. This means that it is possible to have the ability.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a configuration diagram of a solid-state imaging device in an embodiment of the present invention. In Figure 1, 1 is a photodiode that performs photoelectric conversion, 2 is a horizontal transfer unit (H-COD) that transfers signal charges horizontally, 3 is an electrode connected to the H-can transfer gate, and 4 is the first stage. output part, 5 is H-CO
A switch for selecting the electrode of D and the first stage output part, 6 is the output line, 7 is the second stage output part, 8 is the first electrode of H-COD, 9 is the second electrode of H-COD , 10 is a first shift register that shifts and selects the electrodes 8 and 9 of the H-COD and the output section 4 of the first stage row by row, and 11 shifts the electrodes 8 and 9 of the H-COD row by row. This is the second shift register to select.

FIG. 2 is a drive pulse timing diagram of a solid-state imaging device in an embodiment of the present invention. In FIG. 2, a is the output pulse waveform of the nth row of the second shift register 11, b is the output pulse waveform of the nth row of the first shift register 1o, and C is the output pulse waveform of the nth row of the first shift register 1o.
is the pulse waveform of the first electrode of H-COD, d is H-ca
The operation of a solid-state imaging device configured as shown in FIG. First, when j=j1, a pulse a is output from the second shift register 11, a pulse C and a pulse d are applied to the electrode of the H-CCD, and a signal charge is read out from the photodiode 1 due to the high level of the pulse C. Next, At time t-12, it is transferred by pulse C and pulse d, but is not output. Next, t= after accumulation time t5
When js, first shift register 10 J: Repulse b
is output, pulse C and pulse d are applied to the electrode of H-COD, and the signal charge is read out from J:rephotodiode 1 at the high level of pulse C, then 1 == 1
4, it is transferred and output.

As described above, according to this embodiment, the signal charge accumulation time can be varied by changing the accumulation time t5, and the element itself can be provided with an aperture function to achieve 6 pages.

Effects of the Invention As described above, the present invention provides an aperture function to the element itself by providing a photoelectric conversion section, a horizontal transfer section, a first shift register, and a second shift register arranged in a two-dimensional manner. can be achieved, and its practical effects are significant.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a solid-state imaging device according to a first embodiment of the present invention, and FIG. 2 is a pulse timing diagram thereof. 1...Photodiode, 2...H1
3CD. 3...H-CCD electrode, 4...1st stage output section, 6...Selection switch, 6...Output line, 7...2 Stage output section, 8...first electrode, 9...second electrode, 10...first
shift register, 11... second shift register.

Claims (1)

[Claims] (1) A photoelectric conversion section in which photoelectric conversion elements are arranged in a two-dimensional manner, a horizontal transfer section that horizontally transfers the optical signal charge accumulated in the photoelectric conversion section, and a vertical transfer section that transfers the horizontal transfer section vertically in rows. a first vertical shift register section that sequentially selects a direction;
A solid-state imaging device comprising: a second vertical shift register section that sequentially selects the horizontal transfer section and an output section that outputs the charges transferred from the horizontal transfer section in the vertical direction.