JPS5812247A - Cathode ray display tube for color print - Google Patents

Abstract

PURPOSE:To use the general and cheap color photographic paper and obtain high quality color pictures by forming the width of individual phosphor films of three primary colors wide for a low sensitivity color and narrow for a high sensitivity color. CONSTITUTION:The width D1 of a red phosphor film stripe 31 corresponding to a low sensitivity R region is set wide, the width D2 of a green phosphor film stripe 32 corresponding to a G region is set medium, and the width D3 of the blue phosphor film stripe 33 corresponding to a B region is set narrow (D1>D2> D3). When the width of individual phosphor films of three primary colors is thus set wide for a low sensitivity color and narrow for a high sensitivity color corresponding to various sensitivities by color of color sensitive materials, the number of beam scanning is increased on the phosphor film 31 with a wider width and is decreased on the phosphor film 33 with a narrower width, thus differences in various sensitivities by color of color sensitive materials can be effectively compensated for. Therefore, the general and cheap color photographic paper can be used and pictures of a high quality tone can be printed out.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cathode ray display tube (hereinafter referred to as CR) for power 2-printing.
(referred to as T). More specifically, the present invention is a power 2-printing device with a display surface composed of five striped fluorescent films corresponding to the five colors of red (R), green (G), and blue (B). The present invention relates to CRTs.

Conventionally, there have been CRTs for color printers that can expose color photosensitive paper to color photosensitive paper by changing the position of the light spot on the phosphor screen and the color of the emitted light according to the input signal, and using this photospora. Used for color facsimiles, etc. This CRT is a normal color TV CR.
It emits light using the same blue phosphor, green phosphor, and red phosphor as the T. On the other hand, there are various types of color photosensitive paper on the market that are irradiated with color light from the CRT display surface, but it is desirable to use one that has high sensitivity and photosensitive characteristics that are almost the same as the visual sensitivity. However, color photosensitive papers or films with high sensitivity and photosensitive characteristics almost the same as the visual sensitivity have the disadvantage that they are generally expensive. On the other hand, general color photographic paper for negative and positive printing is inexpensive, but as shown in FIG. 1, it has photosensitive characteristics with very different sensitivities for different colors. When negative/positive color photographic paper having such characteristics is used as a color photoreceptor, it is not possible to print one color of high quality.

As shown in FIG. 1, the present invention has the ability to use inexpensive color photographic paper that has a large sensitivity ratio for each color, and to obtain high-quality color photographs. -The CRT for color printing according to the present invention is intended to provide a CRT for printing.
The width of each fluorescent film for one color corresponds to the sensitivity of each color of the color photoreceptor (color photographic paper) that is irradiated with color light. 2 and 5 are block diagrams of a CRT for color printing according to the present invention, where FIG. 2 is a sectional view and FIG. 5 is a front view.

In these figures, 1 is a tube, th44; 2 is a coil for electron beam deflection, S is a display surface where the electron beam roars and displays light emission, and 4 is a fiber glass attached to cover this display surface. Plate, 7 Eyeper Glass Plate 4 with 5Fi
As shown in FIG.
6 fluorescent film stripes corresponding to B 31.32.33
The width of these fluorescent films 31, 32, 33 in the moving direction of the color photoreceptor 5 (the width in the direction perpendicular to the scanning direction of the electron beam indicated by arrow a) Dl, D2. D3 is configured differently depending on the sensitivity of each of the 50 color photoreceptors. That is, assuming that a color photoreceptor having surface photosensitive characteristics as shown in FIG. 1 is used, the width D of the red phosphor stripe 31 corresponding to the R region with low sensitivity in FIG. The width D2 of the green phosphor film stripe 32 corresponding to the wide<%G area area is medium, and the width D3 of the color development phosphor film stripe 330 corresponding to the B area is small (D process>D2>
D3).

In this way, if the width of each of the three primary colors is made to correspond to the sensitivity of each color of the photoreceptor, and is made wider for colors with lower sensitivity and narrower for colors with higher sensitivity, the width can be increased. On the widened fluorescent film 31, the number of beams scanned is large, and on the narrowed fluorescent film 33, the number of beams scanned is reduced, effectively compensating for differences in color sensitivity of color photoreceptors. Can be done.

Therefore, according to the present invention, it is possible to print an image with faithful colors and high-quality tones using general inexpensive color photographic paper.

The CRT for cut-printing according to the present invention can be applied to color facsimiles and color printers to print characters, figures, etc.
In addition to obtaining a single image such as a picture, it is also suitable for application to a recording head such as a recording meter that records the input signal waveform of one multi-channel by color coding, and its uses are wide.

[Brief explanation of drawings]

Fig. 1 is a photosensitive characteristic diagram of general color photographic paper, Figs. 2 and S are block diagrams of a CRT for cup printing according to the present invention, Fig. 2 is a cross-sectional view, and Fig. 5 is a front view. It is. 1... Tube, 2... Deflection coil, 5... Display surface, 3
1.32゜33... Fluorescent film stripe, 4... Phino (-Glass plate, 5... Force 2- Photoreceptor.)

Claims (1)

[Claims] (1) In a cathode ray display tube for color printing in which the display surface is composed of at least three phosphor film stripes corresponding to the S primary color, the width of each phosphor film stripe in the direction perpendicular to the scanning direction of the electron beam is determined by the phosphor film stripe. Force 2 - Force of light irradiation 2 - Color that corresponds to the sensitivity of each color of the photoreceptor, and is characterized by being wide for colors with low sensitivity and narrow for colors with high sensitivity. Cathode ray display tube for printing. 1. A cathode ray display tube for color printing according to claim 1, which selects the following.