JPS5825782A - System for photographed picture recording device - Google Patents

Abstract

PURPOSE:To obtain a stable picture, by using a charge transfer part itself as a buffer memory to refresh partially a picture signal repeatedly. CONSTITUTION:A photoelectric charge corresponding to the photographed picture of each picture element is stored in the photo detecting part of a solid-state image pickup element 20. In recording to a recording device 21, the picture signal is circulated in a transfer register of the solid-state image pickup element 20 because terminals 5 and 8 are connected. The frequency of driving pulses is brought into the monitor (television) band to output one-screen components of the picture signal repeatedly to a terminal 22, and one-screen components of still picture are reproduced successively on the monitor device. A part of one screen, namely, one-line components of the picture signal are read out to a register 23 from the storage device 21, and new one-line components of the picture signal are transferred from the register 23 to the register in the solid-state image pickup element 20 synchronously with this readout, and thus, the picture signal is refreshed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a captured image recording device using a CCD*o solid-state image sensor, an I? 1 relates to a photographed image recording device system for reproducing still images. Conventionally, as an image recording device, a photographed image is formed on a solid-state image sensor in a recording mode, and the image is photocharged to the solid-state image sensor. In the playback mode, the photoelectric charge accumulated on the solid-state image sensor is read out and recorded as an image signal on a recording device such as a magnetic tape or magnetic disk. The image is transferred to the monitor and the image is recorded and played back. Since this apparatus uses a magnetic tape or a magnetic disk as a recording device as described above, it is necessary to set the reading speed of signals to the recording device and signals from the recording device at a relatively low speed.

On the other hand, a high-speed signal is required as an O image signal to a monitor such as a television. For this reason, conventional devices are equipped with a memory device, and in the recording mode, photo charges for one screen are transferred from the solid-state image sensor to the memory device, and the signals transferred to the memory device are supplied to the recording device at low speed. Also, in the playback mode, the signal for one screen is read out from the recording device at low speed, and the signal for one screen is stored in the memory device.

One screen worth of signals stored in the memory device was supplied to the monitor at high speed.

However, according to the cough method such as TK, not only is it necessary to store the signal of one screen as a memory device, but it also requires a large capacity memory device, and when playing back still images, stable image playback cannot be achieved for a long time. There are no drawbacks to ib songs.

That is, in the case of continuous reproduction of still images, a method is used in which the image signal of one screen is stored in a memory, and the signal stored in the memory is repeatedly read out at high speed and supplied to a monitor such as a television. On the other hand, when reading signals continuously from a memory device, it is dangerous to obtain a stable image unless the contents of the memory device are refreshed at predetermined intervals due to an increase in dark current and incomplete transfer efficiency.

For this reason, it is necessary to transfer one screen worth of image signals from the bell marking device to the memory every predetermined period of time, and there is a risk that the entire image may be disturbed by the refresh operation.

The present invention has been made in view of this point, and an object of the present invention is to provide a photographing and recording sickle device system that eliminates the above-mentioned drawbacks.

Specifically, the present invention uses the charge transfer section of the solid-state image sensor itself as a buffer memory, and repeatedly circulates the signal of the charge transfer section of the solid-state image sensor, thereby continuously generating image signals for the image sensor. At the same time, a memory is provided to store a part of the image signal of one screen, and the image signal of a predetermined part of one screen is sequentially sent to the memory from a recording device at low speed. The contents of the memo 9-O are then transferred at high speed to the charge transfer section of the solid-state image sensor at predetermined intervals, and seven partial recipes of the image signal are sequentially repeated to display one screen. It is an object of the present invention to provide a photographed image recording apparatus system which performs image signal flexure and eliminates the above-mentioned drawbacks.

Next, an image recording apparatus system according to the present invention will be explained.

FIG. 1 is a circuit diagram showing an embodiment of a solid-state image sensor applied to an image recording device system according to the present invention. The figure shows solid-state sensors from 20 manufacturers, and one of the skeleton elements is a pixel that constitutes a light-receiving section.The photographed image is formed on the axillary pixel, so that each pixel corresponds to the photographed image. A vertical transfer register 02 constitutes a vertical transfer section, and the photocharges accumulated on the picture elements are transferred to the register 2 by a gate pulse φGIIC (not shown). 3 is a horizontal transfer register to which the charge of the vertical transfer register 2 is transferred. 6i, 6b.

Terminals 7a and 7b are input with drive pulses for the horizontal and vertical transfer registers, and are driven by supplying drive pulses in the same manner as the normal interfin type area sensor 0 drive. That is, now, if the part of picture elements 11 to IN is designated as Homare-in 1L, the part of picture elements 2a to 2N□ is designated as 2-in 2L, and the following is similarly designated as line 3L... line NL,
The photocharges of the line IL, that is, the picture elements 1a to IN, are first transferred from the register 2 to the register 3 by the above driving pulse, and the register 3 is transferred to the 2-in IL, that is, the picture elements, via the charge-voltage converter 4. A voltage corresponding to the photocharges from 11 to IN is output, and the charges for one digit of picture elements (1m to IN) are read out. Register 2 after reading line IL
The charges of picture elements 2a to 2N are transferred to Kam3.Register 3
outputs voltages corresponding to the photocharges of line 2L, that is, picture elements 2 to 2N; similarly, voltages corresponding to the photocharges of each line are output sequentially through the voltage-charge night converter 59; An external image signal input to the external input signal terminal 8 is transferred.

The charges in the horizontal transfer register 10 are sequentially transferred to the register 2 in synchronization with the timing of charge transfer to the vertical transfer register 2 or the horizontal transfer register 3.

The tooth register 100 has a capacity corresponding to the above-mentioned - line.

FIG. 2 is a brick diagram showing one embodiment of the photographed image recording device system according to the present invention, where jl) shows the playback state, and (b)
) indicates the refresh state.

In the figure, 120 represents the solid-state image sensor of FIG. 1, and 8
5 indicates an external input terminal of the solid-state imaging device 20, and 5 indicates an output terminal. Reference numeral 21 supplies the magnetic tape to a monitor device such as a television. Reference numeral 23 denotes an analog shift register, and this register stores, for example, the signals for the area sensor line, that is, the signal for the above-mentioned -jiin in FIG.

Next, the first. The present invention will be explained in detail using FIG. Now, the image signal imaged on the solid-state image sensor 20 is transmitted to the recording device l! It is assumed that terminals 5 and 8 of the element 20 are connected as shown in FIG. The image signal recorded in the recording device 21 is stored in the charge transfer register of the solid-state image sensor.

In this state, since the terminals 5 and 8 are connected, the image signal is circulating within the transfer register of the solid-state image sensor 20. Therefore, monitor the frequency of the drive pulse (
tv set)? If the i7 range is selected, an image signal for one screen is repeatedly output to the terminal 22, and a still image for one screen is continuously reproduced on the monitor device.

On the other hand, a part of one screen, that is, the image signal for one line is read out from the recording device 21 to the register 23. In this case, reading is performed at a frequency that can be output by the recording device (magnetic recording means). As the frequency, one approximately in the audio band is used.

It is now assumed that image signals for 617th line IL have been transferred from the recording device 21 to the register 23. Thereafter, the register 23 is connected to the input terminal 8 of the solid-state image pickup device 20 as shown in FIG. 2(b) in synchronization with the image signal for the line IL being sent to the register aKm. This allows line IL
In synchronization with the read operation, the fraction gR signal for a new line IL is transferred from the register 23 to the register 10. In this way, when the signal for line IL is transferred to register IO, terminals 5 and 8 are connected again in FIG.
Connect as in a). As a result, the image signals for line IL are refreshed, the image signals are circulated again, and still images are continuously reproduced.

After refreshing the image signal for line IL in this way, the image signal for register 23Kj-y2L is slowly transferred from the recording device at the frequency of the audio band, and then the image No. 48 for line 2L is transferred to register 3. The register 23 is connected to the terminal 8 as shown in FIG. 2(b) in synchronization with the data being transferred. As a result, the image signals for line 2L are refreshed as described above. Thereafter, the image signals of each line are sequentially replaced from the input IL to the line NL by the above operation, thereby completing the refreshing of the image signals of the entire screen.

Similarly, when transferring the image signal of the register 23 to the register 10 of the solid-state image sensor 20, it is assumed that the driving frequency and phase of the register 23 are the same as the drive pulse of the solid-state image sensor.

As described above, in the photographing surface@recording device system according to the present invention, the charge transfer register of the solid-state image sensor is used as a buffer memory.

The image signal of one solid-state image sensor is circulated in the charge transfer register, and a part of the self-weight signal from the recording device is sequentially transferred to the memory, and the contents of the memory are input to the charge transfer register of the solid-state image sensor at a predetermined period. By,
Since the image signals are sequentially refreshed, a large capacity memory device is not required, and refresh and screen change operations can be performed without disturbing the entire playback screen.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of a solid-state image sensing device applied to the photographed m-image recording device system according to the present invention. FIG. 2 is a block diagram showing an embodiment of the photographing surface recording device system according to the present invention. FIG. 2(a) shows the playback state, and FIG. 2(b) shows the refresh state. ing. 20・・・・・・・・・Solid-state imaging device 23・・・・・・Register patent applicant Canon Co., Ltd. agent Gyoshi Marushima---”7′ 12)

Claims (1)

[Claims] By repeatedly circulating the image signal in the memory, the image signal of the same screen is repeatedly generated, and the cumulative image signal is sequentially replaced with a new image signal in a predetermined unit. A photographic image recording device system characterized in that, in particular, an S** image signal is updated.