WO2007027191A1 - Cathode ray tube having implosion protection band - Google Patents

Cathode ray tube having implosion protection band Download PDF

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Publication number
WO2007027191A1
WO2007027191A1 PCT/US2005/046519 US2005046519W WO2007027191A1 WO 2007027191 A1 WO2007027191 A1 WO 2007027191A1 US 2005046519 W US2005046519 W US 2005046519W WO 2007027191 A1 WO2007027191 A1 WO 2007027191A1
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WO
WIPO (PCT)
Prior art keywords
component
panel
sidewall
cathode ray
ray tube
Prior art date
Application number
PCT/US2005/046519
Other languages
French (fr)
Inventor
Rein Roman Mutso
James John Maley
Original Assignee
Thomson Licensing
Maley, Elaine
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson Licensing, Maley, Elaine filed Critical Thomson Licensing
Publication of WO2007027191A1 publication Critical patent/WO2007027191A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/87—Arrangements for preventing or limiting effects of implosion of vessels or containers

Definitions

  • the invention relates to cathode ray tubes and, more particularly, to a cathode ray tube having an implosion protection band applied prior to exhaust, to reduce stress during exhaust.
  • CRTs cathode ray tubes
  • the depth of the CRT is largely determined by the depth of a glass funnel that forms the CRT, it is necessary to shorten the funnel to provide the CRT with a reduced depth. Shortening the funnel of the CRT requires increasing the deflection angle of the funnel. As the deflection angle of the funnel is increased, however, the tensile stress on the funnel is also increased. The typical deflection angle of a reduced depth CRT is about 125-150 degrees.
  • the invention relates to a cathode ray tube 1 and method of making the same, wherein the cathode ray tube 1 has an envelope 2 including a panel 3 having a sidewall 9. The panel is connected by a funnel 5.
  • An implosion protection band 12 is attached to the sidewall 9 of the panel 3 prior to exhausting during the manufacture of the cathode ray tube.
  • the implosion protection band 12 comprises at least two different materials having different coefficients of thermal expansion.
  • Figure 1 is a flow chart of the process according to the invention compared to the conventional processing.
  • Figure 2 is the profile of the CRT according to the invention.
  • Figure 3 shows views of a first embodiment of the invention.
  • Figure 4 shows views of a second embodiment of the invention.
  • Figure 5 shows views of a third embodiment of the invention.
  • FIG. 2 shows a cathode ray tube (CRT) 1 having a glass envelope 2 comprising a rectangular faceplate panel 3 and a tubular neck 4 connected by a funnel 5.
  • the faceplate panel 3 consists of a viewing faceplate 8 and a peripheral flange or sidewall 9 with a panel seal edge 15.
  • the panel seal edge 15 is sealed to a funnel seal edge 17 by a glass frit 7.
  • the funnel 5 has an internal conductive coating (not shown) that extends from an anode button 6 toward the faceplate panel 3 and to the neck 4.
  • a three-color phosphor screen 20 can carried by an inner surface of the faceplate panel 3.
  • the screen 20 may be, for example, a line screen of phosphor lines arranged in triads.
  • a mask support frame assembly 21 is removably mounted in predetermined spaced relation to the screen 20.
  • a glass mount 16 containing an the electron gun assembly 13, shown schematically by dashed lines in Figure 2 is centrally mounted within the neck 4 and generates and directs three inline electron beams, a center beam and two side or outer beams, along convergent paths through the mask frame assembly 21 to the screen 20.
  • the CRT 1 is designed to be used with an external magnetic deflection yoke 14 shown in the neighborhood of the funnel-to-neck junction. When activated, the yoke 14 subjects the three beams to magnetic fields that cause the beams to scan horizontally and vertically in a rectangular raster over the screen 20.
  • the CRT further contains the shrinkband 12 or implosion protection band 12 applied to the sidewall 9 of the panel 3.
  • the mount containing the electron gun assembly is then sealed to the neck of the funnel 5 to form a bulb.
  • the bulb is then exhausted to form the CRT. This is followed by the application of the shrinkband or implosion protection band, followed by electrical processing to activate the electron gun assembly and any electrical testing.
  • the inventive process involves the application of the shrinkband or implosion protection band 12 prior to exhausting the bulb.
  • the various embodiments of the invention which are described below each significantly reduce the vacuum loading tensile A- stress on the CRT during the exhaust process and cool down to room temperature.
  • the processing steps according to the invention are described. Following the preparation of the panel of the CRT, the panel 3 and funnel 5 are sealed together, which can be done with a frit material at temperatures reaching about 450 degrees Celsius, hi one first processing embodiment, denoted as (i) in Figure IB, the shrinkband 12 or implosion protection band 12 is applied directly after sealing, followed by mount sealing the electron gun assembly to the funnel of the CRT.
  • the bulb with the electron gun assembly is then exhausted, which can be done at temperatures reaching about 310 degrees Celsius.
  • the CRT is then subjected to additional finishing processes which can include getter flashing, electrical processing (e.g. activation of the cathodes and spotknocking) and electrical testing.
  • Figure IB also shows a second inventive process for the application of the shrinkband or implosion protection band 12 prior to exhausting the bulb, denoted by (ii).
  • the panel and funnel are sealed together, which can be done with a frit material at temperatures reaching about 450 degrees Celsius, hi this second processing embodiment, the mount containing the electron gun assembly 13 is then sealed to the funnel 5 of the CRT. This is then followed applying the shrinkband 12 or implosion protection band 12 to the sidewall 9 of the panel 3.
  • the bulb with the electron gun assembly 13 is then exhausted, which can be done at temperatures reaching about 310 degrees Celsius.
  • the CRT is then subjected to additional finishing processes which can include getter flashing, electrical processing (e.g. activation of the cathodes and spotknocking) and electrical testing.
  • the shrinkband 12 or implosion protection band 12 comprises at least two components, wherein a first component 10 is made of a material having a lower thermal expansion character and a second component 11 having a higher thermal expansion character.
  • Figures 3-5 show several mechanical embodiments according to the invention.
  • Figure 3 A shows a top plan view of the first mechanical embodiment where the first component 10 with lower expansion character surrounds the sidewall 9 of the panel 3 and is in contact therewith.
  • the second component 11 with higher expansion character contains four parts which are joined to the first component 10 positioned on a side of the first component 10 opposite to the sidewall 9 of the panel 3 around the corners of the panel 3.
  • Figures 3 B and 3 C show side views of two configurations of the first embodiment.
  • Figure 3B shows the second component 11 having narrower width than the first component 10 and the configuration in Figure 3C shows the second component 11 having a similar width to the first component 10.
  • Figure 4 shows a second mechanical embodiment case where the first component 10 with lower expansion character surrounds the panel 3 and is in contact therewith.
  • the second component 11 with higher expansion character contains four parts which are joined to the first component 10 position on a side of the first component 10 opposite to the sidewall 9 of the panel 3 positioned centrally along the sides of the panel 3.
  • the first component is continuous and the second component is not.
  • Figures 4B and 4C show side views of two configurations of the second embodiment.
  • FIG. 4B shows the second component 11 having narrower width than the first component 10 and the configuration in Figure 4C shows the second component 11 having a similar width to the first component 10.
  • embodiments similar to that shown in Figure 4A can include the second component 11 only having two parts, one on one side of the panel 12 and the other on the opposite side of the panel.
  • Figure 5 shows the third mechanical embodiment where the first component 10 with lower expansion character contains four parts which are centrally positioned along each side of the panel 3 and in contact therewith.
  • the second component 11 with higher expansion character surrounds the sidewall 9 of the panel 3 and is joined with the parts of first component 10 on a side of the parts of the first component opposite the panel 3.
  • the second component is continuous.
  • embodiments similar to that shown in Figure 5 A can include the first component 10 only having two parts, one on one side of the panel 12 and the other on the opposite side of the panel.
  • the first component 10 has a coefficient of thermal expansion that is lower than the coefficient of thermal expansion of the second component 11 at both room temperature and at temperatures used to exhaust the CRT.
  • the first component 10 can be various steels (e.g. carbon steel) and the second component 11 can be various metallic steels or metallic alloys having higher coefficients of thermal expansion (e.g. 304 SS steel or 22/3 alloy) than the first component 10.
  • the material for the second component 11 will have a coefficient of thermal expansion that is at least 10% greater than that for the first component 10.
  • Preferred materials for the first and second mechanical embodiments are carbon steels having a coefficient of thermal expansion of about 12xlO "6 /°C for the first component 10 and 304 stainless steel having a coefficient of thermal expansion of 18x10 "6 /°C for the second component 11.
  • Preferred materials for the third mechanical embodiment are Invar (about 36% Ni/Fe alloy) having a coefficient of thermal expansion of 1.2x10 "6 /°C for the first component 10 and carbon steels having a coefficient of thermal expansion of about 12xlO "6 /C for the second component 11.
  • Additional embodiments of the invention include the shrinkband or implosion protection band 12 including lugs for mounting in a television chassis and the shrinkband or implosion . protection band 12 being utilized in CRTs having substantially flat front surfaces. Further, the embodiments according to the invention can include CRTs having high deflection angles (e.g.
  • the invention includes a fully assembled cathode ray tube apparatus simply having a shrinkband and implosion protection band 12 described above and shown in Figures 2-5.
  • the CRTs having the shrinkband or implosion protection band 12 can be reprocessed, if needed (e.g. when an electron gun assembly fails either in the factory or in the field), with the shrinkband or implosion protection band 12 attached.
  • reprocessing involves replacing an existing electron gun assembly 13, re-exhausting of the CRT would be necessary.
  • the advantage with the above-mentioned cathode ray tube apparatus is that the CRT with the shrinkband or implosion protection band 12 will have significantly reduced vacuum loading tensile stress during the reprocessing; hence, the CRT will be less likely to implode.

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  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

The invention relates to a cathode ray tube 1 and method of making the same, wherein the cathode ray tube 1 has an envelope 2 including a panel 3 connected by a funnel 5, and an implosion protection band 12 that is attached to the panel 3 prior to exhausting during the manufacture of the cathode ray tube. The implosion protection band 12 comprising at least two different materials having different coefficients of thermal expansion.

Description

Cathode Ray Tube Having Implosion Protection Band
Cross-Reference to Related Application
This application claims the benefit under 35 U.S. C. 119(e) of U.S. Provisional Patent
Application Serial No. 60/713,138, entitled "Cathode Ray Tube Having Implosion Protection Band," filed August 31 , 2005, which is incorporated by reference herein in its entirety.
Field of the Invention
The invention relates to cathode ray tubes and, more particularly, to a cathode ray tube having an implosion protection band applied prior to exhaust, to reduce stress during exhaust.
Background of the Invention
As new types of image display devices, such as non-cathode ray tube flat panel displays, continue to be introduced into the marketplace, there is an increased demand to reduce the depth of conventional cathode ray tubes (CRTs) to remain competitive with the non-cathode ray tube flat panel displays. Because the depth of the CRT is largely determined by the depth of a glass funnel that forms the CRT, it is necessary to shorten the funnel to provide the CRT with a reduced depth. Shortening the funnel of the CRT requires increasing the deflection angle of the funnel. As the deflection angle of the funnel is increased, however, the tensile stress on the funnel is also increased. The typical deflection angle of a reduced depth CRT is about 125-150 degrees.
Cathode ray tubes having shorter and flatter funnels unfortunately experience enhanced vacuum loading tensile strength. This vacuum loading tensile strength becomes higher near the frit seal area. This is a particularly serious problem because the frit seal area is a primary source of implosions during exhaust. It would therefore be desirable to develop a CRT that has a reduced propensity for implosions during exhausting processing.
Summary of the Invention The invention relates to a cathode ray tube 1 and method of making the same, wherein the cathode ray tube 1 has an envelope 2 including a panel 3 having a sidewall 9. The panel is connected by a funnel 5. An implosion protection band 12 is attached to the sidewall 9 of the panel 3 prior to exhausting during the manufacture of the cathode ray tube. The implosion protection band 12 comprises at least two different materials having different coefficients of thermal expansion.
Brief Description of the Drawings
The invention will now be described by way of example with reference to the accompanying drawings. Figure 1 is a flow chart of the process according to the invention compared to the conventional processing.
Figure 2 is the profile of the CRT according to the invention. Figure 3 shows views of a first embodiment of the invention. Figure 4 shows views of a second embodiment of the invention. Figure 5 shows views of a third embodiment of the invention.
Detailed Description of the Invention
Figure IA shows a flow chart of the conventional process for manufacturing a CRT and Figure IB shows alternative embodiments of the processes of manufacturing a CRT
according to the invention. Figure 2 shows a cathode ray tube (CRT) 1 having a glass envelope 2 comprising a rectangular faceplate panel 3 and a tubular neck 4 connected by a funnel 5. The faceplate panel 3 consists of a viewing faceplate 8 and a peripheral flange or sidewall 9 with a panel seal edge 15. The panel seal edge 15 is sealed to a funnel seal edge 17 by a glass frit 7. The funnel 5 has an internal conductive coating (not shown) that extends from an anode button 6 toward the faceplate panel 3 and to the neck 4. A three-color phosphor screen 20 can carried by an inner surface of the faceplate panel 3. The screen 20 may be, for example, a line screen of phosphor lines arranged in triads. A mask support frame assembly 21 is removably mounted in predetermined spaced relation to the screen 20. A glass mount 16 containing an the electron gun assembly 13, shown schematically by dashed lines in Figure 2, is centrally mounted within the neck 4 and generates and directs three inline electron beams, a center beam and two side or outer beams, along convergent paths through the mask frame assembly 21 to the screen 20. The CRT 1 is designed to be used with an external magnetic deflection yoke 14 shown in the neighborhood of the funnel-to-neck junction. When activated, the yoke 14 subjects the three beams to magnetic fields that cause the beams to scan horizontally and vertically in a rectangular raster over the screen 20. The CRT further contains the shrinkband 12 or implosion protection band 12 applied to the sidewall 9 of the panel 3.
In conventional manufacturing after the panel and the funnel are frit sealed together, the mount containing the electron gun assembly is then sealed to the neck of the funnel 5 to form a bulb. The bulb is then exhausted to form the CRT. This is followed by the application of the shrinkband or implosion protection band, followed by electrical processing to activate the electron gun assembly and any electrical testing.
In contrast, the inventive process involves the application of the shrinkband or implosion protection band 12 prior to exhausting the bulb. The various embodiments of the invention which are described below each significantly reduce the vacuum loading tensile A- stress on the CRT during the exhaust process and cool down to room temperature. With reference to Figure IB, the processing steps according to the invention are described. Following the preparation of the panel of the CRT, the panel 3 and funnel 5 are sealed together, which can be done with a frit material at temperatures reaching about 450 degrees Celsius, hi one first processing embodiment, denoted as (i) in Figure IB, the shrinkband 12 or implosion protection band 12 is applied directly after sealing, followed by mount sealing the electron gun assembly to the funnel of the CRT. The bulb with the electron gun assembly is then exhausted, which can be done at temperatures reaching about 310 degrees Celsius. After exhaust, the CRT is then subjected to additional finishing processes which can include getter flashing, electrical processing (e.g. activation of the cathodes and spotknocking) and electrical testing.
Figure IB also shows a second inventive process for the application of the shrinkband or implosion protection band 12 prior to exhausting the bulb, denoted by (ii). Following the preparation of the panel 3 of the CRT, the panel and funnel are sealed together, which can be done with a frit material at temperatures reaching about 450 degrees Celsius, hi this second processing embodiment, the mount containing the electron gun assembly 13 is then sealed to the funnel 5 of the CRT. This is then followed applying the shrinkband 12 or implosion protection band 12 to the sidewall 9 of the panel 3. The bulb with the electron gun assembly 13 is then exhausted, which can be done at temperatures reaching about 310 degrees Celsius. After exhaust, the CRT is then subjected to additional finishing processes which can include getter flashing, electrical processing (e.g. activation of the cathodes and spotknocking) and electrical testing.
In each of the processing embodiments above, the shrinkband 12 or implosion protection band 12 comprises at least two components, wherein a first component 10 is made of a material having a lower thermal expansion character and a second component 11 having a higher thermal expansion character. Figures 3-5 show several mechanical embodiments according to the invention. Figure 3 A shows a top plan view of the first mechanical embodiment where the first component 10 with lower expansion character surrounds the sidewall 9 of the panel 3 and is in contact therewith. In this first mechanical embodiment, the second component 11 with higher expansion character contains four parts which are joined to the first component 10 positioned on a side of the first component 10 opposite to the sidewall 9 of the panel 3 around the corners of the panel 3. Figures 3 B and 3 C show side views of two configurations of the first embodiment. The configuration in Figure 3B shows the second component 11 having narrower width than the first component 10 and the configuration in Figure 3C shows the second component 11 having a similar width to the first component 10. Figure 4 shows a second mechanical embodiment case where the first component 10 with lower expansion character surrounds the panel 3 and is in contact therewith. In this second mechanical embodiment, the second component 11 with higher expansion character contains four parts which are joined to the first component 10 position on a side of the first component 10 opposite to the sidewall 9 of the panel 3 positioned centrally along the sides of the panel 3. In this embodiment and the first, the first component is continuous and the second component is not. Figures 4B and 4C show side views of two configurations of the second embodiment. The configuration in Figure 4B shows the second component 11 having narrower width than the first component 10 and the configuration in Figure 4C shows the second component 11 having a similar width to the first component 10. Alternatively, embodiments similar to that shown in Figure 4A can include the second component 11 only having two parts, one on one side of the panel 12 and the other on the opposite side of the panel.
Figure 5 shows the third mechanical embodiment where the first component 10 with lower expansion character contains four parts which are centrally positioned along each side of the panel 3 and in contact therewith. The second component 11 with higher expansion character surrounds the sidewall 9 of the panel 3 and is joined with the parts of first component 10 on a side of the parts of the first component opposite the panel 3. In this embodiment, the second component is continuous. Alternatively, embodiments similar to that shown in Figure 5 A can include the first component 10 only having two parts, one on one side of the panel 12 and the other on the opposite side of the panel.
In each of the examples, the first component 10 has a coefficient of thermal expansion that is lower than the coefficient of thermal expansion of the second component 11 at both room temperature and at temperatures used to exhaust the CRT. For the first and second embodiments, the first component 10 can be various steels (e.g. carbon steel) and the second component 11 can be various metallic steels or metallic alloys having higher coefficients of thermal expansion (e.g. 304 SS steel or 22/3 alloy) than the first component 10. Preferably, the material for the second component 11 will have a coefficient of thermal expansion that is at least 10% greater than that for the first component 10. Preferred materials for the first and second mechanical embodiments are carbon steels having a coefficient of thermal expansion of about 12xlO"6/°C for the first component 10 and 304 stainless steel having a coefficient of thermal expansion of 18x10"6/°C for the second component 11. Preferred materials for the third mechanical embodiment are Invar (about 36% Ni/Fe alloy) having a coefficient of thermal expansion of 1.2x10"6/°C for the first component 10 and carbon steels having a coefficient of thermal expansion of about 12xlO"6/C for the second component 11.
Other embodiments are possible within the scope and spirit of the invention. Additional embodiments of the invention include the shrinkband or implosion protection band 12 including lugs for mounting in a television chassis and the shrinkband or implosion . protection band 12 being utilized in CRTs having substantially flat front surfaces. Further, the embodiments according to the invention can include CRTs having high deflection angles (e.g.
125-150 degrees).
Further, the invention includes a fully assembled cathode ray tube apparatus simply having a shrinkband and implosion protection band 12 described above and shown in Figures 2-5. In such an embodiment, the CRTs having the shrinkband or implosion protection band 12 can be reprocessed, if needed (e.g. when an electron gun assembly fails either in the factory or in the field), with the shrinkband or implosion protection band 12 attached. When reprocessing involves replacing an existing electron gun assembly 13, re-exhausting of the CRT would be necessary. The advantage with the above-mentioned cathode ray tube apparatus is that the CRT with the shrinkband or implosion protection band 12 will have significantly reduced vacuum loading tensile stress during the reprocessing; hence, the CRT will be less likely to implode.

Claims

ClaimsWhat is claimed is:
1. A cathode ray tube comprising a panel having a sidewall and a shrinkband surrounding the sidewall, wherein the shrinkband comprises a first component having a first coefficient of thermal expansion and a second component having a second coefficient of thermal expansion, the first coefficients of thermal expansion being lower than the second coefficient of thermal expansion, at least one of the components surrounds the sidewall.
2. The cathode ray tube of claim 1 wherein the first component surrounds the sidewall.
3. The cathode ray tube of claim 2 wherein the second component contains four parts which are joined to the first component positioned on a side of the first component opposite to the sidewall and located around corners of the panel.
4. The cathode ray tube of claim 2 wherein the second component contains four parts which are joined to the first component positioned on a side of the first component opposite to the sidewall and centrally located at sides of the panel.
5. The cathode ray tube of claim 2 wherein the second component contains two parts which are joined to the first component positioned on a side of the first component opposite to the sidewall and centrally located at sides of the panel, the two parts being on opposite sides of the panel.
6. The cathode ray tube of claim 1 wherein the second component surrounds the sidewall.
7. The cathode ray tube of claim 6 wherein the first component contains four part's which are joined to the second component positioned on a side of the second component facing the sidewall and centrally located at sides of the panel.
8. The cathode ray tube of claim 6 wherein the first component contains two parts which are joined to the second component positioned on a side of the second component facing the sidewall and centrally located at sides of the panel, the two parts being on opposite sides of the panel.
9. The cathode ray tube of claim 2 wherein the width of the second component does not exceed the width of the first component in locations where the first and second component are in contact.
10. The cathode ray tube of claim 6 wherein the width of the second component does not exceed the width of the first component in locations where the first component and second component are in contact.
11. A process for manufacturing a cathode ray tube comprising the steps of providing a shrinkband having a first component having a first coefficient of thermal expansion and a second component having a second coefficient of thermal expansion, the first coefficients of thermal expansion being lower than the second coefficient of thermal expansion, at least one of the components forming a continuous loop; providing an assembly having a panel including sidewalls; applying the shrinkband to the panel such that the shrinkband surround the sidewall; and exhausting the assembly.
12. The process of claim 11 wherein in the step of providing a shrinkband, the first component surrounds the sidewall.
13. The process of claim 12 wherein in the step of providing a shrinkband, the second component contains four parts which are joined to the first component positioned on a side of the first component opposite to the sidewall and located around corners of the panel.
14. The process of claim 12 wherein in the step of providing a shrinkband, the second component contains four parts which are joined to the first component positioned on a side of the first component opposite to the sidewall and centrally located at sides of the panel.
15. The process of claim 11 wherein in the step of providing a shrinkband, the second component surrounds the sidewall.
16. The process of claim 15 wherein in the step of providing a shrinkband, the first component contains four parts which are joined to the second component positioned on a side of the second component facing the sidewall and centrally located at sides of the panel.
17. The process of claim 12 wherein in the step of providing a shrinkband, the width of the second component does not exceed the width of the first component in locations where the first and second component are in contact.
18. The process of claim 15 wherein in the step of providing a shrinkband, the width of the second component does not exceed the width of the first component in locations where the first component and second component are in contact.
19. The process of claim 12 wherein in the step of providing a shrinkband, the first component contains two parts which are joined to the second component positioned on a side of the second component facing the sidewall and centrally located at sides of the panel, the two parts being on opposite sides of the panel.
20. The process of claim 15 wherein in the step of providing a shrinkband, the first component contains two parts which are joined to the second component positioned on a side of the second component facing the sidewall and centrally located at sides of the panel, the two parts being on opposite sides of the panel.
PCT/US2005/046519 2005-08-31 2005-12-20 Cathode ray tube having implosion protection band WO2007027191A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US71313805P 2005-08-31 2005-08-31
US60/713,138 2005-08-31

Publications (1)

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WO2007027191A1 true WO2007027191A1 (en) 2007-03-08

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Publication number Priority date Publication date Assignee Title
JPS5530107A (en) * 1978-08-23 1980-03-03 Hitachi Ltd Explosion-proof braun tube and reinforcing method same
JPS63936A (en) * 1986-06-18 1988-01-05 Toshiba Corp Manufacture of explosion-proof band for cathode-ray tube
JPS63116344A (en) * 1986-11-05 1988-05-20 Mitsubishi Electric Corp Explosion-proof type cathode-ray tube
JPH02207440A (en) * 1989-02-08 1990-08-17 Hitachi Ltd Reinforced cathode-ray tube
US5138461A (en) * 1988-12-21 1992-08-11 Hitachi Ltd. Implosion-protected cathode-ray tube
US5241394A (en) * 1991-08-29 1993-08-31 Thomson Consumer Electronics Cathode-ray tube having a shrinkfit implosion protection band with enhanced corrosion resistance
JP2003208861A (en) * 2002-01-11 2003-07-25 Mitsubishi Electric Corp Cathode ray tube

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5530107A (en) * 1978-08-23 1980-03-03 Hitachi Ltd Explosion-proof braun tube and reinforcing method same
JPS63936A (en) * 1986-06-18 1988-01-05 Toshiba Corp Manufacture of explosion-proof band for cathode-ray tube
JPS63116344A (en) * 1986-11-05 1988-05-20 Mitsubishi Electric Corp Explosion-proof type cathode-ray tube
US5138461A (en) * 1988-12-21 1992-08-11 Hitachi Ltd. Implosion-protected cathode-ray tube
JPH02207440A (en) * 1989-02-08 1990-08-17 Hitachi Ltd Reinforced cathode-ray tube
US5241394A (en) * 1991-08-29 1993-08-31 Thomson Consumer Electronics Cathode-ray tube having a shrinkfit implosion protection band with enhanced corrosion resistance
JP2003208861A (en) * 2002-01-11 2003-07-25 Mitsubishi Electric Corp Cathode ray tube

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Title
PATENT ABSTRACTS OF JAPAN vol. 004, no. 059 (E - 009) 2 May 1980 (1980-05-02) *
PATENT ABSTRACTS OF JAPAN vol. 012, no. 200 (E - 619) 9 June 1988 (1988-06-09) *
PATENT ABSTRACTS OF JAPAN vol. 012, no. 362 (E - 663) 28 September 1988 (1988-09-28) *
PATENT ABSTRACTS OF JAPAN vol. 014, no. 502 (E - 0997) 2 November 1990 (1990-11-02) *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 11 5 November 2003 (2003-11-05) *

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