WO1984000250A1

WO1984000250A1 - Image pickup tube

Info

Publication number: WO1984000250A1
Application number: PCT/JP1983/000151
Authority: WO
Inventors: Takehiro Kakizaki
Original assignee: Sony Corp
Priority date: 1982-06-25
Filing date: 1983-05-19
Publication date: 1984-01-19
Also published as: JPS59248U

Abstract

An image pickup tube has markers for discriminating the four corner positions from the effective image pickup zone, which extend corresponding to the four corners of the effective image pickup zone of the electron beam in a transparent electrode patterned on the image pickup tube target, thereby providing a simple and effective adjustment of the scanning zone of the electron beam and the image pickup screen range during the assembly and manufacture of the image pickup tube.

Description

Details Technical field

INDUSTRIAL APPLICABILITY The present invention is applied to a single-color imaging tube used in a three-tube imaging camera that captures optical images of, for example, red, green, and blue colors, and adjusts an imaging screen range during manufacturing thereof. This makes it possible to easily and reliably adjust the deflection angle of the electron beam and adjust the centering.

Background art

In general, a general monochromatic image pickup tube has a target electrode made of a transparent electrode 9 attached to the inner surface of a faceplate of the image pickup tube, and a photoconductive film is attached thereon. An electron gun is arranged in the tube along the tube axis direction facing the target. In addition, a field mesh electrode is disposed in the inside of the tube so as to equalize the electric field in front of the target so as to face the target. The transparent electrode (target electrode) in the above-mentioned target and the socket is formed over almost the entire region of the face plate facing the inside of the tube.

On the other hand, in the final stage of the manufacture of the image pickup tube, the adjustment of the scanning area of the electronic beam on the target, that is, the adjustment of the imaging screen area, that is, the electronic beam Adjustment of the deflection angle and adjustment of the center cylinder.

OMPI This adjustment is made by playing back the image on a monitor-only television while scanning the electronic beam. It is performed while observing the turn. However, in this case, as described above, in the case where the transparent electrode of the target is formed on the entire surface, there are some standards for these adjustments. Therefore, in this case, first, the electron beam is overscanned, the frame of the field mesh electrode is moved out, and the deflection angle is adjusted based on this. The centering is being adjusted. Therefore, the adjustment is difficult and possibly inaccurate.

-Recently, the stray capacitance was reduced by the presence of the above-mentioned transparent electrode in the target. By turning it, an electron beam scanning region and a terminal lead-out region are formed in a limited manner, and unnecessary portions are eliminated.

In the present invention, this is the case. In a turned transparent electrode, the adjustment can be further easily and reliably performed.

DISCLOSURE OF THE INVENTION

That is, in the present invention, the image pickup tube target c. A marker corresponding to the four corners of the effective imaging area of the electron beam on the transparent electrode and for recognizing the four corner positions outside the effective imaging area is extended to the turned transparent electrode. Provided.

OMPI Brief description of drawings

FIG. 1 is a schematic cross-sectional view of an example of a camera tube to which the present invention is applied, FIG. 2 is a schematic cross-sectional view of a main part thereof, and FIG. . FIG. 4 is a front view of a monitor picture tube for a monitor used for describing the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an example of the present invention will be described with reference to the accompanying drawings'. First, referring to FIG. 1 and FIG. 2, (1) is an imaging tube tube in which an electron gun (2) is arranged in a tubular portion (1a) of the tube. The face plate (3) is hermetically sealed at the front end of the part (la). A tag (4) is placed inside the face plate (3). Then, a field mesh electrode is provided in the tube (1) facing the target (4) to make the electric field in front of the target (4) uniform. (5) is arranged.

Between the front end face of the tubular portion (la) and the face plate (3), an in-coming ring (8) fixed in the ring-shaped electrode (7) is sandwiched. Then, both are hermetically sealed. As shown in FIG. 2, a cross-section of the main part of the insulation ring (8) includes a metal frame (e.g., a metal frame) of the field mesh electrode (5). The metal projection (5b) provided in 5a) is embedded in the ゥ. In this way, the field mesh electrode (5) is formed by the fin and the comming ring (8). As a result, the ring-shaped electrode (7) is used as a power supply terminal for the field mesh electrode. Numeral (9) is an electrostatic deflecting means composed of a pair of horizontal and vertical electrostatic deflecting electrodes formed on the inner periphery of the tubular portion (la) of the tubular body (1). (10) is a focusing coil arranged outside the tube (1).

As shown in Fig. 2, the target (4) is a transparent electrode formed of a transparent conductive film on the inner surface of the faceplate), that is, the target electrode (LI). Is formed, and a photoconductive film (12) is formed thereon. (13) is a terminal bin of the electrode (11) provided to penetrate the face plate (3).

Particularly, in the present invention, the transparent electrode (11) of the target (4). As shown in Fig. 3, the scan area (11a) of the electron beam including the effective imaging area, which is indicated by the dashed line (L4) in the figure, and the extension of the j-extended terminal C) a terminal deriving area (lib) in which the operation is performed, and a marker (lie) extending two areas (11a) or (lib) outside the imaging area (14). Turn. C of this transparent electrode (U). The turn is performed by depositing a transparent conductive layer on the entire surface of the face plate (3) and then performing photo-etching on the transparent conductive layer. It can be turned. For example, four markers (11c) are provided corresponding to the four corners of the effective imaging area (14) of the electronic beam.

These markers (11c) are, for example, as shown in the figure, each having a triangular shape, and each tip is at each corner of the effective imaging area &).

'Single _v -, _ΑΓ GMPI It is located at the position corresponding to the tip of the corner. Then, the range surrounded by, for example, the four markers (11c) is similar to this around the effective imaging area (L4) and is similar to this. The marker (11c) is placed at a position where it is larger by 10.

With this configuration, the deflection size and centering adjustment of the electronic beam scanning of the image pickup tube can be performed with reference to the force (11c). it can.

That is, in this case, as shown in Fig. 4, in the manufacture of the marker, a marker provided on the transparent electrode iil) of the imaging tube to adjust the deflection size (corner) or centering. lie). In other words, in this case, a motor-use television picture tube (20) for reproducing an optical image based on an image pickup signal of the image pickup tube is provided as shown in FIG. The screen (21) of the television picture tube (20) corresponds to the four corner markers (11c) of the image pickup tube according to the present invention described above in advance. Prepare a television picture tube (20) for monitoring. The screen (21) of the picture tube (20) is provided with a power switch (22). In these markers, (22), the four corners of the raster obtained by the electronic beam scanning in the above-mentioned image pickup tube are exactly the inner tip of the marker (11c) in the image pickup tube. So that it is located at

After that, the electron beam scanning area on the target of the image pickup tube, that is, the effective image pickup area

O PI For example, the deflection size adjustment and the centering adjustment are performed by using the raster tower ⁰ obtained by this image pickup tube in the screen of the picture tube (20). It is possible to perform trivial work while projecting on the room (21). That is, in the above-mentioned image pickup tube, the electron beam is scanned (scanned) on the target (4), and this raster is scanned on the screen (21) of the picture tube 0). ) Play on top. Then, the horizontal and vertical deflection voltages and the centering of the image pickup tube are adjusted, and this raster is adjusted. The four corners of the turn should be exactly located at the inner end of the marker (23) of the screen (21) of the picture tube (20). It is known that the scanning range of the electronic beam in the imaging tube is, for example, 10 times larger than the originally set effective imaging area on each side. After that, if the deflection electric field E is reduced electrically, for example, by 10% in the horizontal and vertical directions, the electronic beam scanning range in the image pickup tube should be set exactly. The adjustment means such as a 10% reduction variable resistor is set in advance to the power EE supply source of the deflecting means of the image pickup tube. If provided, the settings can be made automatically.

As described above, according to the imaging tube according to the present invention, a margin (l ie) is added to the outside of the effective imaging area, and this margin is applied.

(H e) allows the effective imaging area to be known indirectly, so to say, Scanning range and position can be easily set, and after setting, this marker (11c) can be prevented from affecting the captured image. An excellent and high-precision imaging tube can be obtained.

WIPO

Claims

The scope of the claims

C for imaging tube target. On the turned transparent electrode, the ability to determine the above four corner positions outside the effective imaging area is extended corresponding to the four corners of the effective imaging area of the electron beam on the transparent electrode. The imaging tube provided.

OMPI

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