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
  • H01J29/89—Optical or photographic arrangements structurally combined or co-operating with the vessel
• • 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
  • H01J29/006—Arrangements for eliminating unwanted temperature effects
• • 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
  • H01J29/89—Optical or photographic arrangements structurally combined or co-operating with the vessel
  • H01J29/894—Arrangements combined with the vessel for the purpose of image projection on a screen

Definitions

• the present invention relates to a liquid-cooled cathode-ray tube device, particularly a liquid-cooled cathode-ray tube device that is suitably applied to, for example, a high-intensity cathode-ray tube used for a color mouth connector.
• the high-brightness cathode ray tube increases the energy of the electron beam that impacts the phosphor screen to obtain a high-brightness reproduction optical image.
• the heat generated on the fluorescent surface by the impact of the electron beam of the high energy beam, or in addition to this, the fluorescent light of the electron beam is placed inside the tube facing the Yingko surface. Shadow masks, ahas that regulate the landing position of the electronic beam relative to the surface.
• an electrode for arriving at an electron beam such as a one-Jigrill
• the heat generated by this electrode due to the impact of the electron beam causes the energy of the electron beam to change. With the increase of one, it becomes remarkable.
• C Force The front face of the cathode ray tube where the fluorescent surface is formed. Nell, that is, glass. Since the thermal conductivity of the cell is low, the temperature rise in the central part where heat is not easily dissipated particularly during continuous operation is remarkable. This results in so-called temperature quenching of the Ying body. This temperature quenching is a phenomenon in which the brightness of the phosphor decreases as the temperature rises, and the degree of this temperature quenching varies with the phosphor of each color.
• the intermittent operation causes the temperature to rise so as to cause temperature quenching on its bright surface.
• the cells need to be cooled. It is conceivable that this cooling is performed by a cooling fan, but in this case, c on the front of the tube. This c along with the ventilation to the cell surface. The dust is sent to the cell surface.]], This dust is c. Adhesion to the cell surface causes apparent deterioration. In this case, there is also a problem of noise from the cooling fan. '
• the front surface of the cathode ray tube is used. Clear liquid cooling medium in contact with the cell, especially convection It has been proposed to arrange a liquid that is easy to produce and to cool it.
• Such a liquid-cooled cathode ray tube device in particular, a closed convection type cathode ray tube device, has a fluorescent surface (for example, as shown in FIG. 1 in which a partial cross-sectional side view is shown).
• a flat front surface C of the cathode ray tube tube (1) on which 7) is formed.
• a transparent glass plate is formed, for example, glass.
• Flannel (2) In front of the cell (la) and opposed to it, a transparent glass plate is formed, for example, glass.
• a ring-shaped metal spacer (3) with excellent thermal conductivity is interposed between the cells (la) and (2) to form a metal spacer.
• Ha Flanks (la) and (2) are set facing each other with the distance between them set. This frame-shaped metal spacer) and c.
• the inner surface of the cell (2) is bonded with a resin adhesive, for example, a silicone resin (4), and is liquid-tightly sealed.
• a liquid-tight space (5) is formed between the cells (2) and (la).
• the liquid-tight space (5) is filled with a transparent and easily convective liquid cooling medium (6). You.
• the cathode ray tube body (1) having such a configuration is used with its honeycomb (la) arranged in a substantially vertical state or an obliquely inclined state.
• the cooling medium (6) filled in the closed space (5) is located on the front face of the cathode ray tube (1).
• the outer surface of the cell (la) is brought into direct contact with the outer surface of the cell. Therefore, according to such a configuration, c. Nell
• the cooling medium (6) is effectively heated by this, and the heated cooling medium (6) moves upward and generates convection in the space (5). With this. Even the heat at the center of the panel (la), for example, is effectively transferred to the periphery, and a metal space made of, for example, aluminum, which has excellent thermal conductivity, is disposed around the periphery.
• the heat is transferred to the metal spacer (3), and the heat is transmitted through the metal spacer (3) to come into contact with the outside air of the metal spacer or to come into contact with the heat dissipating path of the chassis or the like. Dissipation is performed O
• the cathode ray tube device having such a configuration.
• it has been relatively effective to control the temperature rise in the cell (la), for example, in projectors, it is required that the cathode ray tube have high brightness and high resolution.
• higher heat integration is required, and more effective heat dissipation is required.
• Vp is the anode voltage
• Ik is the force source current. If it is raised, the thickness of the front channel of the tube (1) needs to be increased in order to avoid an increase in X-ray transmission.
• the lens design requires a Yeongguang surface (7) and a lens.
• the thickness of the cell (la) is too large.) Therefore, in this case, a method of increasing the content of, for example, lead which has an X-ray shielding effect as a glass material of the transparent honeycomb (2) is adopted.
• the glass containing such a large amount of lead has a property that its hardness is reduced and it is easily damaged, so that in this case, the temperature rise as described above occurs, and thus the transparent glass is produced. . If any deformation occurs in the cell (2) due to thermal expansion, damage is particularly likely to occur. Therefore, if the luminance is increased in this way, more effective radiation cooling will be required.
• a heat radiation fin (8) is provided to increase the contact surface area with the outside air. Even so, heat dissipation is not as effective.
• the present inventors previously conducted various experimental studies and found that this was due to the fact that the heat of the cooling medium (6) was not effectively transferred to this metal spacer. I found out. That is, in practice, the metal sensor is).
• the outer surface and the inner surface of the portion interposed between the flannels (2) and (la) are bonded to the flannels (2) and (la) in a liquid-tight manner by the resin (4). Therefore, the contact area between the metal spacer and the cooling medium (6) is small, so that the heat of the cooling medium (6) is effectively transferred to the metal spacer (3). Investigated what was.
• FIG. 2 shows an example of this cathode ray tube apparatus.
• the inner periphery is provided with a plate-like inner periphery protruding part (3e) thinner than the other part, which is immersed in the cooling medium (6) in the space) so that it comes into direct contact with it.
• it is intended to increase the contact area between the metal spacer (3) and the medium (6).
• a 7 ° port-ejector is constructed, as shown in a schematic cross-sectional view of FIG. 3, the transparent cathode of the above-described cathode ray tube device.
• Lens system (9) is arranged opposite to cell (2).
• This lens system (9) has, for example, a lens barrel O) with a cylindrical lens holder (11) arranged around the front of the cathode ray tube (1). For example, it is fixed by screwing three mounting leg pieces (12) out of the end of ().
• the lens holder (11) has a flange at the rear end.
• the lens system (9) and the front of the cathode ray tube are used in a 7-inch cathode ray tube.
• the distance from the cell (la) is, for example, about 20 dew.
• the present invention relates to a liquid-cooled hermetic convection type cathode-ray tube applied to a high-intensity cathode-ray tube such as a color cathode ray tube type 7 ° port injector as described above.
• the present invention relates to a front surface of a cathode ray tube.
• a metal spacer that also functions as a frame-shaped radiator is arranged around the effective screen on the outer surface of the cell, and the transparent glass is passed through this metal spacer.
• the cell is the front face of the cathode ray tube described above. Specified by metal spacer for This front face is arranged so as to be opposed to each other with a predetermined interval. Flannel and transparent c.
• a liquid-tight space is formed between the cell and the cell, and a transparent liquid cooling medium is sealed in the liquid-tight space.
• the inner periphery of the metal spacer is brought into direct contact with the transparent liquid ordering medium contained in the liquid-tight space over almost the entire periphery.
• a projection is provided that protrudes upward from the position corresponding to the upper end of the front panel of the cathode ray tube, and is provided between this projection and the metal spacer.
• Provide a liquid-tight extension space that extends beyond the above-mentioned liquid-tight space into which the transparent liquid cooling medium enters.
• heat radiation fins will be provided on the outer periphery of the metal spacer.
• the metal spacer has a portion substantially parallel to the front panel and a front panel connected thereto.
• An L-shaped cooling medium injection port consisting of a portion substantially perpendicular to the cell] is provided.
• FIG. 1 is a side view showing a cross section of a part of a conventional cathode ray tube device
• Fig. 2 is a side view showing a cross section of a part of a cathode ray tube device to be compared with the present invention
• Fig. 3 is a conventional cathode ray tube.
• FIG. 4 is a cross-sectional view showing a state in which a lens system of the tube device is mounted
• FIG. 4 is a perspective view showing a part of an example of a cathode ray tube device according to the present invention
• FIG. 5 is a front view thereof
• FIG. The figure is a side view with a part of it cut away
• Figure 7 is the transparent c.
• FIG. 8 is a front view of an example of the metal frame
• FIGS. 10 and 10 are a top view and a perspective view, respectively, as viewed from behind.
• FIG. 11 is a cross-sectional view of a main part of the device of the present invention.
• FIG. 12 is a partial view of a main part of another example of the present invention.
• FIG. 13 is a perspective view as a cross section, FIG. 13 is a table diagram for explaining the present invention, and
• FIG. 14 is a line diagram for explaining effects of the present invention.
• FIG. 4 An example of the present invention will be described with reference to FIG. In the drawings below FIG. 4, the same reference numerals are given to portions corresponding to FIG. 1 to FIG. 3.
• a frame-shaped metal spacer (3) is arranged around the effective screen on the outer surface of the cell (la), and a transparent board such as a glass plate is passed through the metal spacer (3).
• the cell (2) is opposed to the front panel (la) with a required space between the panels (2).
• the cell forms a liquid-tight space (5) between) and (la).
• a position corresponding to the upper side ⁇ of the cell (la)]? Provide a protruding part (2C) that protrudes upward.
• this type of cathode ray tube device is arbitrarily selected in the vertical direction, and is assembled, for example, as a projector.
• the metal spacer (3) provided with symmetrically protruding portions (2C) on the upper and lower edges, respectively, is made of, for example, an aluminum die cast. As shown in FIG. 8 or FIG.
• the metal spacer (3) is located at the front of the cathode ray tube (1).
• the ring-shaped peripheral wall surface (3B) has a protruding portion (3C) vertically protruding above and below it.
• the frame (3A) is c. It has an outer peripheral shape corresponding to the outline shape of the cell (la) and an inner peripheral shape along the outline of the effective screen of the cathode ray tube (1).
• the upper and lower protruding portions (3C) have a thickness corresponding to the axial width of the ring-shaped peripheral wall surface (3B), and have a plurality of grooves extending over the respective upper and lower outer surfaces and the rear surface. (14) is provided, and a heat radiating fin (15) is formed between these grooves (14).
• the front surface of the vertically projecting portion (3C) is formed so as to be flush with the front surface of the frame portion (3A).
• (17) are the flank and protruding portions provided on the left and right sides of the upper and lower protruding portions (3C) of the metal spacer (3), respectively.
• an insertion hole 118) is provided for attaching a metal spacer (3) to a fixed portion, for example, a chassis.
• the front part of the cathode ray tube (1) that is, the front face C.
• Adhesive resin (4) such as silicone resin is interposed along the entire circumference of (la), whereby liquid-tightness is formed between frame (3A) and honeycomb (la).
• a similar adhesive resin (4) is interposed along the entire periphery of the cell (2), thereby forming a metal spacer (3) and a c.
• Adhere liquid (2) liquid tightly.
• a liquid-tight space (5) is formed between the cells (la) and (2) by the metal spacer (3) and sealed by the adhesive resin (4).
• the upper and lower protruding portions (3C) of the metal spacer (3) and the upper and lower protruding portions (2C) of the transparent cell (2) are set in advance so as to face each other in the above-mentioned bonded state.
• the positional relationship is set.
• the contour of the panel (2) is formed to correspond to the contour of the metal spacer (3), but is selected to be slightly smaller than that of the metal spacer (3).
• the front side of the metal sensor (3) that is, transparent c.
• a concave portion 9) is provided on the side opposite to the cell (2) except for the peripheral portion joined by the adhesive resin ( 4 ) of the transparent cell (2).
• the inner surface of the frame (3A) of the metal spacer (3) that is, the front surface of the tube (1).
• the inner peripheral part of the frame-shaped part (3A) and c is also on the side facing the cell (la).
• a gap is formed depending on the thickness of the adhesive resin (4) interposed between the adhesive layer and the cell (la).
• metal spacers (3) and c so that such gaps can be formed.
• a projection (20) is formed to abut against the cell (la).
• a transparent liquid cooling medium (6) for example, an aqueous solution of ethylene glycol is injected and filled into the liquid-tight space including the extension space (5A).
• a transparent liquid cooling medium (6) for example, an aqueous solution of ethylene glycol is injected and filled into the liquid-tight space including the extension space (5A).
• the inner peripheral portion of the frame-shaped portion (3A) of the metal spacer (3) comes into immersion contact over a predetermined width in the cooling medium (6), and in particular, the extension space. : Transparent C due to the presence of 5).
• the cooling medium (6) enters between the upper and lower extensions (3c) of the gasket (3) except for the sealing part made of the resin (4) on the outer periphery. also, the this medium (6), made into a this of contact between the metal scan Bae colonel (3) and c 0, channel (2).
• the injection of the medium (6) into the space (5) communicates with the space (5) at the thick portion between the grooves (14) in the protrusion (3C) of the metal spacer (3).
• the injection hole (21) is formed through the injection hole (21) thus formed.
• the injection hole (21) is formed from the upper and lower outer surfaces of the protruding portion (3C) to each front surface.
• the extension space (5A) It can be formed in an L-shaped cross section.
• the vertical injection hole (21a) of the character-shaped injection hole (21) extends to the upper and lower outer surfaces of the protrusion (3C), and the medium (6) is injected into the space (5).
• a screw fitted with an elastic washer may be screwed into the screw hole (21a) to seal the injection hole (2).
• (22) is a notch formed in the upper part of the frame (3A) of the metal sensor (3A).
• the bubbles generated in the cooling medium (6) injected into the space (3) are removed from the effective screen. It is for extracting.
• the extension space (5A) of the liquid-tight space (5) is c.
• the metal spacer (2) is formed along the surface direction.
• the metal spacer (3) further has a projection (3C) on the metal spacer (3). It is needless to say that various modifications can be made such that a cavity (5) extending in a direction intersecting with the plane direction of the cell (2) can be provided to form a T-shaped cross section. This is your cousin.
• the inner peripheral portion of the frame-shaped portion (3A) of the metal spacer (3) is disposed in contact with the front surface channel (la) of the cathode ray tube (1). It is immersed in the liquid cooling medium (6) so as to come in contact with it. Provide a space (5A) between the protrusion (2C) of the screw (2) and the protrusion (3C), especially of the metal spacer, so that the liquid cooling medium also enters here.
• the contact area between the metal substrate and the cooling medium (6) can be increased, and the metal substrate can be made transparent.
• Increased contact area between the cell (2) and the cooling medium (6) It spoon is grave, metal scan spacers (3) and Mae ⁇ Ha 0, channel (2) heat radiation area Ru good in the and increase in the heat absorption area can be achieved.
• the protrusion (2C) is c. At least at the upper edge of the tunnel (2), the heat of the medium (6), which is heated by the heat of the cathode ray tube (1) and rises, is effectively used. Will be dissipated.
• the protrusion (2C) is provided on the screw (2), and the protrusion (2C) is a protrusion (3C) constituting the heat dissipating fin (15) of the metal spacer (3). ), It is unlikely that the occupied space will increase substantially compared to the cathode ray tube device shown in Figs. 1 and 2 described above. And an extension space into which the liquid cooling medium (6) enters in the portion where the fin (15) is installed in this way.
• the conventional example and the comparative example having the structures described in FIGS. 1 and 2, respectively, and the above-described embodiment according to the present invention are applied to a 5.5-inch cathode ray tube.
• T L — To The average temperature of the difference between the temperature TL of each part of the medium (6) and the room temperature To after 23 hours from when the wattage power is applied is determined by the transparency in each case.
• the heat radiation area and heat absorption area of the screw (2) and the metal spacer (3) are shown in the table of Fig. 13. As can be seen from the table i9, according to the present invention, the liquid cooling medium is used.
• h AI R Barre heat transfer coefficient and the call of the liquid and air, liquid, the physical properties of air and to It is a constant determined by the physical properties of the surface of the solid in contact.
• K is the thermal conductivity of the glass or metal
• S i, S and S 2 are the contact area with the liquid, the cross-sectional area of the path through which heat passes through the solid, and the contact area with air, respectively.
• D is the length of the path through which heat passes through the solid.
• thermal resistance Is called thermal resistance. Now, if these thermal resistances are expressed by
• T L -o q ⁇ R i 1 ⁇ 4) '.
• Ri represents the sum of the thermal resistance.
• Transparent c The amount of heat released from the cell (2) and the metal filter (3) is given by equation (5).

Landscapes

• Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
• Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
• Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=12286347

Family Applications (1)

Country Status (7)

Cited By (2)

Families Citing this family (11)

Citations (2)

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• 1983
  • 1983-02-24 JP JP58029809A patent/JPS59157938A/ja active Granted
• 1984
  • 1984-02-22 EP EP84900882A patent/EP0136360B1/en not_active Expired
  • 1984-02-22 US US06/667,496 patent/US4634918A/en not_active Expired - Lifetime
  • 1984-02-22 AU AU25705/84A patent/AU564543B2/en not_active Expired
  • 1984-02-22 DE DE8484900882T patent/DE3478169D1/de not_active Expired
  • 1984-02-22 KR KR1019840000860A patent/KR910005076B1/ko not_active Expired
  • 1984-02-22 WO PCT/JP1984/000062 patent/WO1984003390A1/ja active IP Right Grant

Patent Citations (2)

Non-Patent Citations (1)

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