JPS58133752A - Cathode-ray tube for display light source - Google Patents

Abstract

PURPOSE:To triplicate the number of picture elements, and increase the accuracy of a cathode-ray tube for a display light source by providing the cathode-ray tube with the same number as the number of plural multicolor phosphor dots of electron guns in positions corresponding to said plural multicolor phosphor dots. CONSTITUTION:A black-light absorbing film 15 made of a graphite matter or the like is applied to the surface of one end of a cathode-ray tube except three differently-colored phosphor dots 11R, 11G and 11B. Three electron guns 13R, 13G and 13B are positioned at the other end of a cathode-ray tube 10 correspondingly to the three phosphor dots 11R, 11G and 11B. A non-focusing flood electron beam 14R is discharged from an electron gun 13R, and irradiates and stimulates the above red-color emitting phosphor dot 11R so as to produce a red light spot 16R. In the same manner as above, the electron gun 13G and 13B discharge non- focusing flood electron beams 14G and 14B, which irradiate and stimulate a green-color emitting and a blue-color emitting phosphor dot 11G and 11B so as to produce a green and a blue light spot 16G and 16B, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cathode ray tube for a light source used in giant display fabrication, and in particular provides a high-definition and high-contrast cathode ray tube.

Conventional example 1 is the electronic display board of a sealed baseball stadium, the rooftop of a feature, or! ! There have been many problems with giant wax display devices that display advertising images on the floorboards, which create images by arranging a large number of color light bulbs and selectively blinking them.

To give some examples, for example, the platform of a light bulb emits light due to the red heat of the filament, and the color of the light emitted is mainly red to white-orange. For example, it is quite difficult to generate a large amount of blue or edge colored light from a light bulb.

In addition, in the case of such a light bulb method, the fineness ta of each m element is
In order to adjust the current, the applied current to the filament must be turned on and off by 1k, or the applied current must be varied.The wave number response of CRT light bulbs is extremely low at less than 10Hz, and the difference between the applied current and the emission intensity There is a problem that the light emission is not direct and the light emission itself becomes gray due to the applied wIt current, and it is difficult to use it for color display that synthesizes colored light for junior high school 1st punctuation or arbitrary color light. Ta. In addition, the light bulbs used in this kind of white paper manufacturing are generally 10W or more.
Hiro's problem is that his fighting power and the heat generated by a single ball are enormous.

In order to eliminate the time required to study the 4L of a conventional giant display device using a light bulb, a giant display device was invented that used a single-color small frame as a light source. The monochromatic small cathode ray blind giant display device has excellent color rebordering properties, extremely low power consumption, and is a space-saving color display display device.

In Figure 1 for explaining the outline of the giant color display device using the above-mentioned monochromatic small-sized kite, (υ represents one autumn kite.

(11) is a red Chenlin line tube, (IG) is a green-polar edge tube,
(111) is a stomach color &#M! Indicates IF. That is, the first
Inner-ζ ho-cho, 8 colors of red, edge, and blue base color small shape shadow lines!
(B).

(IG), (1m) for 1 set L/"C1rDi'=
, and Lja Crt et al.
IG) and (IB) have one example in which a phosphor (4) is coated on the inner surface of the face plate (3) of the vacuum envelope (2) as shown in Figure 2; An electron gun (5) that generates an electron beam is held. The phosphor layer (a monochromatic phosphor that emits red, edge, or blue color) is used.The electron gun (5) generates an unfocused flood beam (6), and the phosphor layer The entire surface of layer (3) is irradiated to produce a predetermined phosphor color.

For such color display devices.

A cathode ray tube (11) is used to turn the color on and off and to vary the amount of light.

(IG), (can be produced by varying N of the electron beam from one electron gun (5).Furthermore, the frequency response of the optical image is determined by the afterglow characteristics of the phosphor layer (8) used, but in general this type Phosphors such as those used in displays (1)17)
The afterglow time of the phosphor is 1ms or less, so 60112
Even in the above image switching, there is no 81m, the modulation of the electron beam is easy, and mid-tone re-drilling can be performed finely.

In addition, the power consumption per cathode ray tube is 1, for example, green s.
For daytime use, approximately 1,000 foot lambert u resistors are a must, but in this case, the self-cost power per cathode rim is approximately 1° IW.

If a huge color display device is constructed using the above-mentioned shade as the amount of light, Ifr
Moreover, it is possible to obtain light of m colors.

It is possible to reproduce natural colors, including control and intermediate colors, and it is also possible to significantly reduce the amount of erase power.

A gigantic color display device constructed as shown in Figure 1 can be constructed by placing the monochromatic cathode tubes shown in Figure 2 as close to each other as possible to increase the number of tubes used per unit of rkJ. The higher and sharper the system or borrowed.

However, each monochromatic light emission pole ray t(lR), (IG) in FIG. 1 has the structure shown in FIG.

(IB) is applied with a high voltage with an extreme voltage of 8 to 10 KV, so it is difficult to bring them close to each other below a predetermined ionization level because of safety and reliability concerns. For example, monochromatic light #i cathode ray tube (1st (IG)
, (1B) has an outer diameter of 28. In the case of @φ, fjrv
I! The pitch of the Amm tube is 46mm/-, and the outer diameter is 20mm.
In the case of @- cathode tunnel, the pitch is 511m/v
It has been said that reducing the pitch size below the above value is problematic in terms of safety and reliability.

Jin's invention is the conventional monochromatic cathode ray w(1i+).

This was done in order to eliminate the above-mentioned drawback of the large display device consisting of (IG) and (1B), which has restrictions in terms of definition, and is qualitatively similar to the line system (1) in Figure 1. k
Increase it by a factor of g and save it to N-thin 8L'.

In addition, the 211: invention is designed to have a greater contrast than the 11th conventional giant display device, and to make the texture of the noodles stand out.

Hereinafter, an example of a single moxibustion method will be described with reference to FIGS. 8 and 4. The reason for this is a schematic drawing of a huge color display device using the unexploded original wire Win, and Figure #i4 shows a schematic drawing of the extremely green UtZ for the light source of this application. A phosphor layer (b) is coated on the inward side of the face plate (2) of the anode for the light whale of the 4th Honko 1, but the phosphor a ~ συ is the same as the bird 8 As shown, a red emitting color phosphor dot (101).

A green-colored phosphor dot (IIG) and a blue-emitting phosphor (IIB) are applied adjacent to each other or at a predetermined gap 1d. Place the phosphor layer (B) on ζ, and add the above 8 color phosphor dots (11), (I).
IG).

The surrounding area other than (IIB) is coated with a black light absorbing film such as graphite material. At the other end of the aII marginal tube Q, there are phosphor dots (11k) of the eight colors.

Eight electron guns (18i+) correspond to (IIG) and (1111).

(18c), (1811) is ki & st L'tel.

An unfocused flood electron beam (1
4 m) is emitted, and the red luminescent color phosphor dora) (
11m), and as shown in factor 8, a red light spot (
16R). 1 Uniformly, the electron gun (1!IG) emits an unfocused flood electron beam (14G) and emits a green-emitting phosphor dot (IIG), and the electron gun CIIIB)
A flat electron beam (1411) is emitted to stimulate the blue-emitting phosphor dot (11 m), and then
Each L is a green light spot (IIG).

Generates a blue light spot (16m). 118-color phosphor dots (IIR), (llc), (llll) and black light absorption ail (1!) Can be formed by a light exposure method such as a slurry method, which is a well-known coating method.Also, a flood electron beam (141) , (14G) , (14B)
are the corresponding phosphor dots (11 m), (II
G) It is designed to irradiate only the area (11 m) and not strike phosphor dots of other colors.

It should be noted that the phosphor layer 01) of the cathode ray tube for light source according to the present invention shown in FIGS. For example, the phosphor layer (b) of the M4-multicolor polar ray tube for light source of the present invention may be composed of four phosphor dots of red, edge, edge, and blue.

The light of the present invention in the fourth part is the eighth part, using the multicolor cathode tube.
In the giant color display wax shown in the figure, the pitch size of each color is one-half the pitch size of the conventional giant color display wax shown in Figure 1.
As a result, the fineness of the image is increased, making it possible to obtain finer-grained images. Also.

8-color phosphor dot (1111), CIIG), (t
Since the black light absorbing film (xm) is coated around the black light absorbing film (xm), the external light that is incident on the black light absorbing film (2) is absorbed.
f'L, the contrast decreases and the image quality improves.

[Brief explanation of the drawing]

The 11th figure is a partial schematic diagram of a conventional eye-sized color display arrangement. 1 is a partial schematic diagram of a display surface of an eye-sized color display device 1 using a cathode ray tube for a light source according to the invention; FIG. FIG. 4 shows a sawtooth sectional view of a cathode ray tube for a light source according to the present invention. In the figure, (1m), (IG), and (III) are red. Green, blue-brown cathode tubes, (2nd section Q is vacuum envelope, (5
)(18R)(18G)(IJiB) is an electron gun, (I
IILXIIG) (IIB) are red, green, and blue phosphor dots, (Lori (14G) (14B)
is an unfocused flood electron beam, and Qf9 is a black light absorption film. Daijijin Kokugitei - 25 Figure 1 Figure 2

Claims (2)

[Claims] (1) The vacuum envelope, the phosphor layer formed inward at the face portion located at one end of the space 11kj, and the vacuum envelope located at the position k opposite to the 4L. In an L-ray tube made up of an L-ray tube that is held at the other end of the vessel and emits an unfocused flood beam, the phosphor layer exhibits at least two or more emitted colors. Number of multicolored phosphor dots adjacent to each other or spaced apart 1111it-
It is assumed that the electron gun is arranged in the same number as the plurality of multicolor phosphor dots at positions corresponding to the plurality of multicolor phosphor dots. Display light 1 Jij river - polar ray tube. (2) A cathode ray tube for a display light source as set forth in claim 1, characterized in that a black light absorbing film is coated on the surface of the light dots.