CN1134034A - Cathode-ray tube and its making method - Google Patents
Cathode-ray tube and its making method Download PDFInfo
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- CN1134034A CN1134034A CN 95111324 CN95111324A CN1134034A CN 1134034 A CN1134034 A CN 1134034A CN 95111324 CN95111324 CN 95111324 CN 95111324 A CN95111324 A CN 95111324A CN 1134034 A CN1134034 A CN 1134034A
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- screen
- ray tube
- cathode ray
- housing
- glass
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- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
A CRT used for television set, large-screen projector, instrument of advertisement is composed of fluorescent screen that has substrate made of transparent material with high thermal conductivity and whose internal surface is coated with fluorescent material, shell, sealing layer between screen and shell, and electronic gun. An air-tight sealing technique is used to make it. Its advantages are high brightness and resolution, small size and light weight.
Description
The present invention relates to cathode ray tube, relate in particular to be used for the display panel of displayed image or literal.
Know, cathode ray tube, its formation mainly comprises: have fluorescent display screen plate, the housing of inside and outside surface and sidewall sections and the sealing layer that connects display panel and housing, be arranged on the electron gun in order to a branch of at least electron beam of emission of enclosure interior.Can obtain better display effect in order to improve cathode ray tube, people have done a large amount of corrective measures on display panel.As the disclosed technology of Chinese patent 93100859X, be characterized in the curve form of screen board outer surface has been carried out the optimization processing, be glass material yet the substrate of display screen still adopts.Because the hot property of glass material and the restriction of light transmission, during as the display screen of display device, be subjected to certain restriction aspect brightness, the resolution with it.One of reason that influences brightness is that the heat conductivility difference of glass material causes, because the demonstration of display screen, be by being overlayed on the fluorescent material on the glass substrate, the variation of excited atom state under the bombardment of electron beam and luminous, under the prerequisite that fluorescent material is not burnt, screen power is big more on the electron beam, light-emitting phosphor brightness is high more, yet, it is limited that fluorescent material is subjected to the electron-beam excitation luminous efficiency, have only wherein less a part of electron beam energy to be converted into luminous energy, and most of energy is converted into heat energy, these heat energy mainly distribute by the conduction of glass screen.If the generation of heat spreads out of greater than heat, will there be the accumulation of heat in the one side that glass substrate applies fluorescent material, causes the temperature difference on the inside and outside two sides of glass screen to raise, cause light-emitting phosphor brightness to descend, even fluorescent material takes place burn, may cause glass screen to burst when serious.Because the heat conductivility of glass is poor, has influenced display brightness, in order to improve display brightness, the beam spot diameter, of electron beam that increases commonly used is to increase light-emitting area.Under the area that does not increase the display screen demonstration, resolution will descend.This shows that with the display screen (glass screen) that glass material is made, brightness and resolution are a pair of unsurmountable contradiction.From another angle, vacuum electron device with the glass screen making, the effect of device is produced crush phenomenon in order to overcome atmospheric pressure, in its structural design, increase its intensity with the thickness that increases glass screen, this causes the reason owing to thickness of glass to cause that luminous point produces bigger halation spot again, causes resolution to descend.Simultaneously, because the light transmittance of glass is made substrate with thicker glass screen again, will the display brightness of display device be affected once more on the basis that is restricted.
The purpose of this invention is to provide another kind of material and replace the display substrate that glass material is made cathode ray tube,, improve display effect to solve the contradiction of brightness of display screen and resolution.
Thereby, cathode ray tube 1 provided by the invention comprises: display panel 2, housing 3 and connect the sealing layer 4 of display screen and housing and be arranged on the electron gun 5 with a branch of at least electron beam of emission of enclosure interior, what the substrate of its display panel 2 adopted is to have conductive coefficient greater than 0.1 * 10
-6Wcm
-1K
-1, see through the material of the visible light of a certain frequency spectrum at least, this material can be yttrium-aluminium-garnet, crystal, diamond, ruby or transparent pottery.In this substrate screen, apply fluorophor 6.Yttrium-aluminium-garnet (YAG) material that the inventor has preferentially selected for use the display panel substrate and industrially has been easy to produce, be easy to realize on the technology, because YAG is a kind of colourless and have a material of thermal conductivity and light transmittance preferably, the experiment proved that, the display screen (YAG display screen) that adopts YAG to make as substrate, compare with glass screen, improved more than ten times in brightness, resolution also has raising more significantly.Cathode ray tube of the present invention, its housing 3 useful ceramics or glass are made.Therefore, when making cathode ray tube of the present invention, except that the technology that adopts existing maturation, also adopted hermetic seal technology in the junction of YAG screen and housing.When housing adopts ceramic material, between YAG screen and pottery, use a kind of transition zone metal, adopt the method for radiation heating or high-frequency heating, pressurize simultaneously to reach hermetic seal.When housing adopts glass, between YAG screen and glass, be coated with last layer glass powder with low melting point slurry equably, heating is warmed up to sealing temperature gradually and reaches hermetic seal in baker.
According to the cathode ray tube that the present invention adopts the YAG display screen to make, when making the screen substrate owing to YAG, the YAG sheet is very thin, and brightness sees through the YAG screen does not almost have any loss, and resolution is not affected yet.This good heat conductive performance, light transmission and the mechanical characteristic of YAG can make display brightness improve greatly.Simultaneously, resolution also can be guaranteed.Compare with traditional glass screen, under the identical situation of other parameter, display screen can be done very for a short time, so the cathode ray tube of making of the YAG display screen has advantages such as brightness height, resolution height and volume are little, in light weight.It can be used for the demonstration of television set, large screen projector, instrument and meter, advertisement etc.
In order to be more readily understood the present invention, by embodiment the present invention is described further in conjunction with the accompanying drawings.
Fig. 1 is a structural representation of the present invention
Hermetic seal schematic diagram when Fig. 2 is pottery for the YAG screen with housing
Hermetic seal schematic diagram when Fig. 3 is glass for the YAG screen with housing
Sequence number is represented among the figure:
1-cathode ray tube; 2-display substrate; 3-housing; 4-sealing layer; 5-electron gun; 6-fluorophor; 7-earthenware; 8-becket; 9-glass shell; 10-glass powder with low melting point.
Embodiment 1 makes the YAG cathode ray tube of full ceramic cartridge
CRT display screen substrate YAG material, housing pottery (95%Al
2O
3), electron gun is arranged in housing, its manufacture method is identical with existing making cathode ray tube process, and distinctive points is YAG screen and ceramic hermetic seal, and the method for its sealing-in is as follows:
(1) YAG sheet end face is polished as display substrate 2;
(2) select for use pure metallic aluminum (purity 〉=98%) to make the aluminium ring as sealing-in transition metal 8;
(3) YAG sheet, aluminium ring, ceramic cartridge are placed vacuum environment (vacuum degree is better than 1 * 10 by shown in Figure 2
-2Pa);
(4) adopt radiation heating or high-frequency heating mode, sealing surface is in is heated to 600 ℃～660 ℃ gradually, programming rate is at 5～25 ℃/min;
(5) heating simultaneously, to YAG screen, aluminium ring, ceramicly evenly exert pressure on perpendicular to sealing surface, pressure range is 75～150Kg/cm
2
(6) when sealing temperature reaches 600 ℃～660 ℃ scopes, be incubated 2 fens more than the kind, disconnected gradually again cooling.
According to above-mentioned steps, realize the hermetic seal between YAG screen and the pottery.
In the closure that has the YAG screen, be the technology that the substrate screen adopts existing mature various coating fluorescent material with the YAG sheet, promptly on YAG substrate screen, produce fluorophor.And then to make with the YAG sheet be the cathode ray tube of substrate screen.
CRT display screen substrate 2 usefulness YAG materials, housing 3 are used glass, and electron gun is arranged in housing, and its manufacture method is identical with existing making cathode ray tube process, distinctive points is the hermetic seal of YAG screen and glass, and its method for sealing is as follows:
(1) YAG sheet end face is polished as display substrate 2;
(2) evenly coat low-melting glass dust slurry 10 at YAG and the joining end face of glass housing:
(3) closure is placed in the baker, heat up gradually, programming rate is 5～15 ℃/min, when sealing temperature is raised to 530 ℃～550 ℃, is incubated 3～10 minutes;
(4) after temperature retention time reaches, lower the temperature with the speed of 5～25 ℃/min.
According to above-mentioned steps, realize the hermetic seal between YAG screen and the glass.
In the closure that has the YAG screen, be the technology that the substrate screen adopts existing mature various coating fluorescent material with the YAG sheet, even on YAG substrate screen, produce fluorophor.And then to make with the YAG sheet be the cathode ray tube of substrate screen.
Claims (8)
1, a kind of cathode ray tube (1) comprising: display panel (2), housing (3) and connect the sealing layer (4) of display screen and housing and be arranged on enclosure interior to launch the electron gun (5) of a branch of at least electron beam, it is characterized in that what the substrate of display panel adopted is to have conductive coefficient greater than 0.1 * 10
-6Wcm
-1K
-1, at least to the material of a certain wavelength visible transparent, and in its substrate screen coating fluorophor (6).
According to claim 1 described cathode ray tube, it is characterized in that 2, the material that display substrate is used is yttrium-aluminium-garnet (YAG) or quartzy or diamond or ruby or transparent ceramic.
According to claim 1 described cathode ray tube, it is characterized in that 3, the material of housing (3) usefulness is pottery or glass.
4, make claim 1 described cathode ray tube, it is characterized in that, between display screen and housing, adopted hermetic seal technology, between screen and housing, the transition zone (4) of being convenient to realize hermetic seal is arranged.
According to the cathode ray tube of claim 3 or claim 4 described making, it is characterized in that 5, when housing was pottery, the transition zone between YAG screen and the pottery was a metal, by radiation heating or high-frequency heating, pressurizes simultaneously to reach hermetic seal.
According to the cathode ray tube of claim 5 described making, it is characterized in that 6, when transition metal was fine aluminium, this sealing temperature was 600 ℃～660 ℃, programming rate is 5～50 ℃/min, and pressure is 30～300Kg/cm
2
According to the cathode ray tube of claim 3 or claim 4 described making, it is characterized in that 7, when the cone housing was glass, the transition zone between YAG screen and the glass was the glass powder with low melting point slurry, heating is to reach hermetic seal in baker.
8, according to the cathode ray tube of claim 7 described making, it is characterized in that, when transition zone is the glass powder with low melting point slurry, when heating in baker, its heating rate is 5～50 ℃/min, and heating-up temperature is 450 ℃～550 ℃, be incubated 3 minutes～30 minutes, rate of temperature fall is 5～50 ℃/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95111324A CN1037383C (en) | 1995-04-20 | 1995-04-20 | Cathode-ray tube and its making method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95111324A CN1037383C (en) | 1995-04-20 | 1995-04-20 | Cathode-ray tube and its making method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1134034A true CN1134034A (en) | 1996-10-23 |
| CN1037383C CN1037383C (en) | 1998-02-11 |
Family
ID=5078623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95111324A Expired - Fee Related CN1037383C (en) | 1995-04-20 | 1995-04-20 | Cathode-ray tube and its making method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1037383C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998029894A1 (en) * | 1996-12-30 | 1998-07-09 | Research Institute Of Synthetic Crystals | Luminous face-plate of a colour projection cathode ray tube and the substrate for manufacturing the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4405881A (en) * | 1980-05-29 | 1983-09-20 | Mitsubishi Denki Kabushiki Kaisha | Color cathode ray tube including Nd2 O3 and Cr2 O3 in face glass |
-
1995
- 1995-04-20 CN CN95111324A patent/CN1037383C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998029894A1 (en) * | 1996-12-30 | 1998-07-09 | Research Institute Of Synthetic Crystals | Luminous face-plate of a colour projection cathode ray tube and the substrate for manufacturing the same |
| CN1053062C (en) * | 1996-12-30 | 2000-05-31 | 国家建筑材料工业局人工晶体研究所 | Light-emitting panel substrate for cathode-ray tube of color projection television |
| US6489715B1 (en) | 1996-12-30 | 2002-12-03 | Research Institute Of Synthetic Crystals | Luminous faceplate of color projection cathode ray tube and substrate for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1037383C (en) | 1998-02-11 |
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