JPS5875740A - Beam index type color picture tube unit - Google Patents

Abstract

PURPOSE:To detect an index luminous signal while using a solid light receiving element, which is small-sized, highly reliable, cheap and requiring no high voltage, by guiding a light to the light receiving element while converting wave length thereof through a focusing plate filled with a specific solution. CONSTITUTION:A cell in the shape of a transparent plate is made of 1mm. thick glass plate, while a phosphor coloring matter brilliant.sulfoflavin solution fills the inside of the cell to be sealed. A focusing plate thus obtained is made to be sample for measurement. For comparison, the focusing plate filled with the solution, wherein rohdamine 6G and 4-MU serving as a phosphor materials are dissolved in ethylalcohol respectively, is also made by the same method to measure conversion efficiency as the focusing plate. As a result of measuring a size of a luminous signal in the focusing plate, wherein the concentration of the phosphor coloring matter is changed, the output of the luminous signal in the case (c) of the focusing plate containing a brilliant.solfoflavin solution is bigger than in the case (a) of the focusing 7 plate containing 4-MU and in the case (b) of the focusing plate containing rohdamine 6G.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a σ beam index type color picture tube device.

Beam index type color picture tube $1511 Face plate shown in the figure (1) Three primary color phosphors on a circular surface 2
@), 2(G), 2(B)t-The black guard band (6) is repeatedly arranged in a striped manner, and the index phosphor (8) is placed on the circular surface via the aluminum film aG. ) is repeated in a striped pattern 7'CIIt
``In the device shown in Figure 2, a single electron gun 13 emits a positive electron beam (14), and when the electron beam (14) is swept, the original signal obtained from the index phosphor (8) is formed on the back of the picture tube. The light is guided through the light transmitting window 11f4 to a photodetector (1s) arranged outside the light transmitting window rL, and the index which is received by the photodetector αl and converted into an electric signal is A signal is used to enable the electron beam to impact a predetermined phosphor.The most important characteristic required for this index phosphor is a short afterglow time; Index pyrogen body t!40
It is a near-ultraviolet phosphor that emits light in the wavelength range around 0 nm. In order to effectively receive the index source signal from the index phosphor stripe group and convert it into an electrical signal, a charger with high sensitivity in the near ultraviolet region is used.
A photomultiplier tube or a charging tube is used, which is equipped with 7 to L, and is a special electron tube for a photomultiplier tube or phototube, which is expensive and requires high voltage.

Due to its large size, it is desired to use solid-state image receiving elements that are small and easy to handle.Solid-state image elements generally have a small light-receiving area and are not suitable for silicon photo-receiving elements, which are commonly used. Best sensitivity from visible to near-infrared wavelength range
0To make up for this shortcoming, please use 5tIili811
Although various efforts have been made to increase the size of the sensor and increase the sensitivity in the short wavelength range, it is extremely difficult to detect the index signal with a single solid-state image receiving element.In general, when the sensitivity of the original detection is low However, in the case of color TV receivers, the beam index is not considered to be condensing, but due to its structure, the light detector is placed on the central axis of the MTTC surface of the fluorescent screen from the index source signal detection system. Due to restrictions such as not being able to place a photodetector, condensing light with a lens has almost no effect, so it is possible to use other condensing methods or use several one-element detectors. Attempts have been made to correct the strength of index element No. 41 that occurs due to the position. However, this method (a) is not preferable because it increases the number of parts and increases the cost.

Book 8F! It is a highly efficient method to convert the source in the near-ultraviolet region, which is the Ar In a beam index type color picture tube device capable of detecting a high index signal, the conversion efficiency can be further increased by using a special material for the condenser plate.

A beam index type color receiver tube device using a fluorescent condenser plate has already been described in detail in Japanese Patent Application No. 140759/1983.

Regarding the fluorescent materials and media used in the fluorescent condensing plate VC, we do not necessarily list those with good characteristics. P has traditionally been used as a material for dye lasers and solar light collectors.
MMA (polymethyl methacrylate) has been doped with xanthine-based or marine-based fluorescent materials. A typical example is rhodamine 6G or rx4-MU (4-methylumbelliferone).
Ru. Although it has excellent tt, 7'2 properties in terms of PMM&μ elements and is used in many optical component ICs, it is not possible to uniformly disperse all of the many existing organic fluorescent materials therein. In this process, transparent FIA synthetic resin VC is not uniformly dispersed, but for fluorescent materials with high conversion efficiency of the index source signal, the fluorescent light is transferred to a transparent flat cell as shown in Figure 3. A method of using it as a light condensing plate filled with a solution of the material can be applied.

Regarding the fluorescent material, rhodamine 6G or 4-
Of course, MU can also be used in a solution state, but when evaluated based on the conversion efficiency of the light collecting plate including the light receiving element, it cannot be said that these materials are optimal for detecting the index source signal. That is, since the light-receiving sensitivity peak of a silicon photodetector is around 800 to 900 nm, the closer the detection wavelength of a fluorescent substance is to this region, the lower the wavelength is. Generally speaking, the quantum efficiency α of an organic fluorescent molecule is longer than the wavelength of fluorescence. 400n for the index source signal.
Since it is near-ultraviolet light with a peak near m, 4
& Signal a, near ultraviolet index 5 for the original substance'
Rhodamine 6G or i4-M Uhiro is required to absorb light efficiently, to have high quantum efficiency, and to emit light at a wavelength close to the peak of photoreceptivity of the silicon photodetector. In order to eliminate the drawback of low conversion efficiency of index 'yt and qi when melting the material into a transparent plate-shaped cell and forming a light condensing plate, the present invention uses brilliant, fluorescent material as a fluorescent material. 7. We propose to detect the index yt with a light condensing plate filled with a solution of offrapine or vironin G in a transparent flat cell. still,
Brilliant, Sal 7 Oflapine, and Vironin G are all trade names, and their composition has not been made clear to frame consumers.
dyers and color 1ists
) has been registered in the published "Color Index", and these materials are identified by this ◎The former is C.

■, Ac1a Red-7-latter Hc, ■, 45005
0 registered as 0 An example will be described below.

Figure 4 shows the conversion behavior W of the index source signal condensing plate of the present invention.
This is a device that measures Ih. That is, the same phosphor used to generate the index source signal in a beam index moat color television picture tube is coated on the entire surface of the screen, and an electron beam excitation VC is applied to the previous Li17.
The light emitted from a test cathode ray tube (e) designed to emit Dλ and other elements is irradiated onto the 81 corpse light collecting plate (1), and the wavelength is converted and focused by the light collecting plate (to). is photoelectrically converted by a photodiode (2).

After the intensifier (2) amplifies the signal, the magnitude of the original signal is measured with the otoscope (to). Furthermore, this is the power supply for driving the picture tube. JIt is oscillated by the test cathode ray tube (2) and emitted from the test cathode ray tube (to), and the signal is also modulated at the same frequency of 3 MHz and converted to the magnitude of the single signal by the oscilloscope). Peak to P of the sine wave of
#j is added as the @ak value.

Example 1 A transparent flat cell as shown in Figure 3 was made using a 1 m thick glass plate, and 10 to 100 mft of fluorescent dye, IJ ant, and sulfoflavin were dissolved in ethyl alcohol of 100+n#. The solution is filled into the cell and sealed. Cell outer dimensions 60X701I1. It is 5m thick. In this manner, a sample for use in determining the T-field of a light condensing plate was obtained. For comparison, rhodamine 6G and 4-MUt-fC were dissolved in ethyl alcohol as fluorescent materials.
, A light condensing plate filled with a solution was also made using a uniform method, and the conversion efficiency as a light condensing plate was measured using the measuring device shown in Figure 4.
The results of the determination are shown in Figure '185. Figure 5 shows the results of all measurements of the magnitude of the 5'E signal for light collecting plates with different concentrations of fluorescent dyes. Regarding (b).

It is shown that the original signal output is large in the case of the light collecting plate containing the brilliant sulfoflavin solution of the present invention (c).

Example 2゜Example 1. Similar measurements were carried out using bironin G as a fluorescent material in 2013). The light condensing plate is a conventional light condensing plate fabricated by heating a rhodamine 6G or Y14-MU solution in a transparent flat plate cell, which can also improve the conversion efficiency of the intelligent signal.

According to one aspect of the present invention, in a beam index type color television picture tube device, YT from the index phosphor is used as a fluorescent material in a fully transparent flat cell with the trade name Brilliant, Sulfo 7 Lavin or Pyrofun. By filling the G solution and converting the wavelength with a nine-concentration source plate and guiding it to the receiving element, there is no need to use a photomultiplier tube or phototube as the receiving element, which was conventionally used in the photoelectron, and it is small and reliable. A solid-state photodetector with high performance, low cost, and no voltage required, especially 1)
This makes it possible to detect the index source signal using a photodiode and a diode.In addition, compared to conventional light condensing plates, the index 5 has a higher conversion efficiency, so it can detect the weak index source signal. This has the effect of increasing the contrast of a beam index type color television picture tube device.

[Brief explanation of the drawing]

W11 Figure 7 of the beam indexer picture tube on the stile.
This is a drawing showing the inner surface of the spray plate. FIG. 2 is a sectional view schematically showing a frame-beam index type color picture tube IT. FIG. 6 is a drawing of a transparent flat cell; FIG. 4 is a block diagram of an apparatus for measuring the conversion efficiency of a light condensing plate of the present invention; 1. Figure @5 and Figure W46 are drawings for explaining all the characteristics of the light condensing plate made in the example of the present invention, respectively.
(R1 (()) [Bl... Three primary color phosphors, (8)...
・Index phosphor, ■...aluminum film, (
16...Light transmission window, α8-・Photodetector (light receiving element). (To)...Light condensing plate. Figure 1 Figure 2 Figure 3 Figure 5 173 Figure 6

Claims (1)

[Claims] (1) ITl consisting of three primary color phosphor stripes repeatedly arranged on the inner surface of the face plate, and a winter index phosphor element repeatedly arranged in a stripe pattern in regular relationship with these three primary color phosphor stripes via an aluminum film.
The emitted electron beam generated by the index phosphor is guided to an external light receiving element through a light transmitting window formed on the back side of the receiving tube. KIJ beam index type color image receiving device 1K: The product name is Brilliant for the flat cell. Sulfoflavin [listed in the "Color Index" published by the Ant Dyeing and Colorist Association 1 in the United States is C1, Mc
idRsd-7] or bironin G [the registration is c, x,
45005) A beam index type color picture tube device using a fluorescent material solution.