JPS6273878A - Solid-state image pickup element - Google Patents

Abstract

PURPOSE:To attain extraction of a required signal only while a disuse signal is discharged by using a solid-state image pickup element to apply conduction control to a transfer FET of a color to be read and a FET discharging other colors. CONSTITUTION:In desiring to read R, the level of the transfer FET T1 and the discharging FET TE2, E3 is brought into H and the transfer FETs T2, T3 corresponding to other colors G, B and the discharging FET E1 correspond ing to the color R are brought into L level by independent control. Similarly, in desiring to read the other colors G, B, the transfer FET corresponding to each color and the discharging FET not corresponding to the said color are subjected to conduction control independently and the transfer FET of other colors and the relevant discharging FET are made nonconductive. The conduc tion period of the transfer FET and the discharging FET is controlled to control a photoelectric storage time for each color and a desired color is read sequential ly one by one color.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a solid-state image sensor comprising a light receiving section, a charge transfer section, and a transfer control section, and a mosaic image sensor arranged on the light receiving section in correspondence with pixels. The present invention relates to a solid-state image sensor comprising a helical drive-like microfilter. Generally, a solid-state image sensor and a solid-state image sensor are the same thing, but for the sake of explanation here, a solid-state image sensor is one for monochromatic light that detects only the brightness and darkness of an image.
A device for color images by combining this with a microfilter is referred to as a solid-state image sensor.

(Prior art) Conventionally, color filters have been used; when using a solid-state imaging device for an l'j MO8 type area sensor for measurement, it is necessary to control the accumulation time for each color, to control the color order of readout, and to adjust the color of the color filter. In some cases, output lines are provided depending on the number of colors.

(Problem to be solved by the invention) However, when multiple output lines are provided like this,
The signal processing circuit became complicated and various problems occurred.

Therefore, it is an object of the present invention to provide a solid-state image sensor that can simplify signal processing by consolidating output lines into one, and also allows unnecessary signal signals to be removed and only necessary signals to be extracted from the output lines. It's in particular.

(Rounding Means and Effects for Solving Problems) According to the present invention, the above object is to provide photodiodes arranged in a grid pattern, vertical switches attached to each photodiode, and each row arranged in a vertical direction. O Consists of a horizontal switch attached to a vertical switch, a vertical shift register that controls the vertical switch, and a horizontal shift register that controls the horizontal switch, and is connected to the output side of the vertical switch in each row of vertical switches. A solid-state image sensor has a vertical signal line that supplies a 1M charge to the output side of the horizontal switch, and an output line on the opposite side to the vertical signal line of the horizontal switch. In the solid-state imaging device taken from the micro color filter, the output line is different for each color of the micro color filter, and the output line for each color is connected to the source of the transfer NET and discharge IPET, respectively. This is achieved by a solid-state imaging probe characterized in that the output terminals are commonly connected, and the drains of the discharge F'1liTs are commonly connected to one discharge drain terminal.

According to the solid-state image sensor configured as described above, by controlling the conduction of the transfer IPIliT of the color to be read and the discharge F'coT of other colors, necessary signals can be read out and unnecessary for each color in any order. A signal can be emitted.

(Example〕 Embodiments of the present invention will be described below with reference to the drawings.

Note that the structure of the solid-state image sensor used to implement the present invention is well known, and therefore its description in this specification will be omitted.

In the figure, the output for each round can color separated by the microfilter placed on the pixel is the output of H & feed F]lC
To the source of T1, the output of G is transferred IFKT
The output of F'KTT2 and the output of B are respectively connected to the source of transfer F'KTT3, and their respective drains are combined into one output line 1 and read out. Furthermore, the outputs for each color from the microfilter are branched, and the single output goes to the source of the exhaust PET CO1, the GO output goes to the exhaust FET11i2Cl source, and the BCI output goes to the exhaust FB source.
iTI! i3O ground, and their respective drains are combined into one discharge #I2 and supplied to the discharge drain terminal.

In the illustrated embodiment, when R cannot be read, the transfer FETs 12 and 13 are set to H, and the transfer FETs corresponding to the other colors G and B are set to T2. T3
and are independently controlled so that the discharge PET lcl belonging to R becomes L.

Similarly, when you want to read out other colors G and B, transfer P]liT corresponding to each color and discharge F that does not belong to the color concerned.
Only ET is independently conduction controlled, other color transfer PF
tT and the associated drain FET are placed non-conducting.

Note that although the above example shows the case of two colors R, G, and Bi, the combination is not limited to these three colors, and other colors can be used.
It goes without saying that any color or other number of colors may be selected.

(Effects of the Invention) As described above, when the solid-state imaging probe of the present invention performs color-specific photometry, the conduction period of the transfer FZT and the discharge FET is limited. The effect of controlling the photoelectric accumulation time for each color and sequentially reading out desired colors one by one.
have Further, since an output line is provided for each color, color mixture signals are not generated on the output line, and color separation can be performed satisfactorily. Since the output lines are combined into one, the external processing circuit can be simplified.

[Brief explanation of drawings]

The figure is a schematic circuit diagram illustrating the invention in detail. 1... Output line, 2... Ejection line, T i, T 2
．． T 3-゛. Transfer FBIT%Kl, 12. E3...Exhaust FET ka1
figure

Claims (1)

[Claims] 1) Photodiodes arranged in a matrix, vertical switches attached to each photodiode, horizontal switches attached to the vertical switches in each column arranged in the vertical direction, and a vertical switch that controls the vertical switches. It consists of a horizontal shift register that controls a shift register and horizontal switches, and a vertical signal line that is connected to the output side of the vertical switch in each vertically arranged column and supplies signal charge to the output side of the attached horizontal switch, and a horizontal line. In a solid-state image sensor, which consists of a solid-state image sensor with an output line on the opposite side of the switch's vertical signal line, and a micro-color filter arranged on the light-receiving section in correspondence with the pixels, the output line is connected to each color of the micro-color filter. Differently, the output lines for each color are connected to the sources of the transfer FET and discharge FET, respectively, the drains of the transfer FETs are commonly connected to one output terminal, and the drains of the discharge FETs are connected to one discharge drain terminal. A solid-state image sensor characterized by being commonly connected. 2) The solid-state imaging device according to claim (1), wherein the transfer FET and the discharge FET can be independently controlled for each color of the corresponding micro color filter.