CN1551283A - Panel for cathode ray tube and cathode ray tube using said panel - Google Patents

Abstract

A front glass for a cathode ray tube and a cathode ray tube using the face glass are provided to reduce the thickness and weight of the cathode ray tube by attaching a flat glass to a face portion of the front glass and to satisfy the quantity of X-ray emission and explosion-proof characteristic prescribed by IEC(International Electrotechnical Commission). A front glass(20) of a cathode ray tube(10) includes a face portion(21) for displaying images, a skirt portion(23) extended from the edge of the face portion backward, and a blend round portion(24) connecting the face portion to the skirt portion. X-ray absorption coefficient of the front glass is 28 to 34. A flat glass(50) is attached to the front side of the face portion such that emission of X-ray is restrained. X-ray absorption coefficient of the flat glass is 20 to 34.

Description

Cathode-ray tube panel and use the cathode ray tube of this panel

Technical field

The present invention relates to a kind of cathode-ray tube panel and adopt the cathode ray tube of this panel, relate in particular to a kind ofly by attaching plate glass, and can improve the cathode-ray tube panel of lightweight ratio effectively and adopt the cathode ray tube of this panel at the surface portion of panel.

Background technology

As everyone knows, the cathode-ray tube glass-vacuum tube (Glass bulb) that adopts in manufacturings such as color TV and computer display consists essentially of three inscapes, just the panel of fluoroscopy images (Panel), be connected the conical funnel (Funnel) of this panel back and be connected tubular neck portions (Neck) on the summit of this funnel.Panel and funnel are to manufacture required size and shape by the glass blocks that dissolves that compression moulding will be called as frit block (Glass gob).

The panel of such cathode-ray tube is by constituting with the lower part: promptly by the surface element (Face portion) of display image, extend to the rear from the peripheral edge portion of this surface element, the mixing fillet part (Blend round portion) that has the side edge part (Skirt portion) of sealing strip (Seal edge) and connect surface element and side edge part constitutes.Funnel is made of body with the sealing strip that combines with the panel sealing limit (Body portion) and the yoke portion (York portion) that extends to this body rear.In the side edge part of panel, support shadow mask by stud with a plurality of holes.One end of the yoke portion of funnel combines with neck, is provided with electron gun in neck, and this electron gun is by the hole of shadow mask, to the imaging that is coated in surface element the inside fluorophor emitting electrons ray.And, be provided with the deflection yoke that electron gun electrons emitted ray is deflected in the yoke portion of funnel.

In recent years, the cathode-ray tube panel, development along with high image quality and maximization, the traditional sphere panel (Spherical panel) or the aspheric surface panel (Non-Spherical panel) that have deep camber (curvature) from surface portion, regenerate rapidly to being that the radius of curvature of benchmark is about 10 to the angular direction, more than the 000mm, almost there is not the flat panel (Flat panel) of curvature.Flat panel compare with the sphere panel have image distortion (Distortion) less, can make the eye minimum fatigue, guarantee the various advantages that the visual angle is open etc.But, because the shortcoming that glass evacuated tube thickness and weight increase has appearred in the maximization and the complanation of cathode ray tube.Particularly, the thickness of glass-vacuum tube and the increase of weight are caused by panel that mainly therefore, the increase meeting of the thickness of panel and weight reaches because of ratio of briquetting and the associativity of funnel reduces quality level etc., become the beneath reason of productivity ratio of glass-vacuum tube.

In addition, the producer of glass-vacuum tube and cathode ray tube in the maximization and the complanation while of Parallel Implementation cathode ray tube, for thickness and the weight that reduces glass-vacuum tube, is just actively carrying out various researchs for lightweight.Lightweight technology one example of the structure fragility that produces as the lightweight that can replenish owing to glass-vacuum tube has on the surface of panel and strengthens the physical strengthening method (Physical strengthening method) that forms about 20% left and right sides compressive stress layers by heat.But, in physical strengthening method, owing to have the difference of the panel structure and the thickness of 3 D complex shape, in the cooling step of Xu Lenglu (annealed glass malleableize stove Annealing lehr), carry out inhomogenous cooling, on panel, produced the residual stress of draftability.The residual stress of such panel has and is subject to small mechanical shock and defective takes place, is given the problem that the thermal stress (Thermal stress) among the Xu Lenglu of this defective is damaged.But also there are the following problems, promptly, when the steps of exhausting (Exhaust process) of glass-vacuum tube, the tensile stress that produces on the side edge part owing to panel is difficult to form sufficient compressive stress layers, cause the increase of strain energy (Strainenergy), occur because of the spontaneous damaging problem of trickle defective.In addition, because lightweight and the surface thickness of attenuation, be unfavorable for the emitting substance shock test of carrying out after surface at panel is by the glass-cutting additional defect.

Other examples as the lightweight technology that remedies the fragile structure that produces because of the weight that alleviates glass-vacuum tube, the ion intensifying method that forms compressive stress layers on panel surface by ion-exchange treatment is for example arranged, but, a little less than the shortcoming of this method is strengthening effect to the panel of defective, effective low.Another different example as the lightweight technology, be to improve the shape of panel and relax or reduce the method for designing that vacuum tensile stress that draught head causes distributes, the method is designed to the wedge shape rate (Wedge rate) that the peripheral thickness of the center thickness of surface element and diagonal axis direction upper surface portion forms more than 170%, so that reduce the thickness of surface portion and side edge portions.But there are the following problems, that is, because the minimizing of surface element thickness, be 28～29cm to the absorption coefficient of the X ray of wavelength 0.06nm ^-1Panel, the amount of radiation of X ray surpasses 0.5mR/h (per hour milliroentgen), lightweight is subjected to very big restriction.The amount of radiation of X ray surpasses the cathode ray tube of 0.5mR/h, and (International ElectrotechnicalCommission, regulation IEC) is so can not make to violate the International Electrotechnical Commission that ensures the user security degree.For the amount of radiation with X ray maintains below the 0.5mR/h, use the X-ray absorption coefficient of wavelength 0.06nm to be for example 32～34cm ^-1The frit block that degree is formed is made panel, but has the problem that is difficult to change frit block manufacturing process and manufacturing cost increase.

Summary of the invention

In order to solve variety of issue as above of the prior art, the object of the present invention is to provide a kind of at panel surface element attached flat board glass and effectively increase the lightweight ratio, and can satisfy International Electrotechnical Commission to the cathode-ray tube panel of the safety-type of x-ray radiation and explosion-resistance characteristic regulation and adopt the cathode ray tube of this panel.

Another order of the present invention is to provide a kind of can exempt the plate glass attached structure of emitting substance shock test by using, and can effectively quantize cathode-ray tube panel of boosting productivity and the cathode ray tube that adopts this panel.

In order to reach this purpose, the invention is characterized in provides a kind of cathode-ray tube panel, at the side edge part that extends to the rear by the surface element of show image, from the periphery of surface element, connect the cathode-ray tube panel that the mixing fillet of surface element and side edge part partly constitutes, when the absorption coefficient for the X ray of wavelength 0.06nm is 28～34cm ^-1, surface element average outer surface curvature radius R (mm) be R 〉=10,000 o'clock, the absorption coefficient that is pasted with on the panel of surface element X ray is 20～34cm ^-1Plate glass, be used to suppress owing to the radiation that reduces the X ray that thickness produces.

Another feature of the present invention is, described cathode ray tube comprises: be used for fluoroscopy images the surface element panel, with the funnel that combines later of panel and the neck that combines with the summit of funnel, wherein, when the receipts coefficient of inhaling for the X ray of wavelength 0.06nm be 28～34cm ^-1, surface element average outer surface curvature radius R (mm) be R 〉=10,000 o'clock, the absorption coefficient that attaches X ray on the panel of surface element is 20～34cm ^-1Plate glass, be used to suppress owing to the radiation that reduces the X ray that thickness produces.

Description of drawings

Fig. 1 represents the sectional view that cathode-ray tube panel of the present invention constitutes.

Fig. 2 represents the formation sectional view of the cathode ray tube of suitable cathode-ray tube panel of the present invention.

Embodiment

Following with reference to accompanying drawing, the preferred embodiment that the cathode-ray tube panel that the present invention relates to is reached for the cathode ray tube that adopts this panel is elaborated.

At first, with reference to Fig. 1 and Fig. 2, the panel 20 of cathode ray tube 10 usefulness that the present invention relates to is by constituting with the lower part: surface element 21, smeared the imaging fluorophor on its inside, and be used for display image; Side edge part 23 rearward extends from the peripheral part of this surface element 21, has sealing strip 22; Mix fillet part 24, be used to connect surface element 21 and side edge part 23.If from the front, panel 20 is the shapes with the similar rectangle on two minor faces being parallel to each other and two long limits.

As shown in Figure 2, the funnel 30 of cathode ray tube 10 is by constituting with the lower part, that is, be made of the body 32 with the sealing strip 31 that engages with the sealing strip 22 of panel 20, the yoke portion 33 of extending on the rear of this body 32.And, connected neck 40 at an end of the yoke portion 33 of funnel 30.

Again with reference to Fig. 1 and Fig. 2, the average outer surface curvature radius R (mm) of surface element 21 is meant that formation is from radiating the mean value of direction by the radius of curvature (Radius ofcurvature) of outboard wheel profile (Outside contour) 21a of the surface element 21 at the center of surface element 21 arbitrarily.The center of surface element 21 is meant that the crossing of two diagonal axis of the surface element 21 that the tubular axis 11 of cathode ray tube 10 passes through, the tubular axis 11 of cathode ray tube 10 are meant the axle that the center of the center of surface element 21 and neck 40 is connected.In Fig. 1, the thickness at symbol Tc presentation surface portion 21 centers, just centre of surface thickness (Centerface thickness:Tc) is (mm).

According to a preferred embodiment of the invention, when panel 20 be that X-ray absorption coefficient to wavelength 0.06nm is 28～34cm ^-1, surface element 21 average outer surface curvature radius when being the panel of R (mm) R 〉=10,000, the absorption coefficient that attaches described X ray in the front of described surface element 21 is 20～34cm ^-1 Flat glass 50, suppress because of reducing the radiation of the described X ray that thickness produces.

Plate glass 50 is that thin plate about 2～5mm constitutes by thickness preferably.During deficiency 2mm, the manufacturing difficulty of plate glass, expense increases, so uneconomical.When surpassing 5mm, the preponderance of plate glass self, operability reduces.And plate glass 50 is by ultraviolet hardening resin (UV cure resin) 51 fronts attached to surface element 21.UV cured meaning to causing neutralization reaction behind the aqueous repeatability monomer irradiation ultraviolet radiations such as (Monomer), ultraviolet hardening resin is by monomer etc. and can absorb the resin compound that the ultraviolet material that adds lustre to is formed, has the good characteristic of aspects such as mechanical rerum natura, thermal endurance, chemical resistance.

On the other hand, using the absorption coefficient to the X ray of wavelength 0.06nm is 28～29cm ^-1Panel make 15～32 inches cathode ray tube, centre of surface thickness with panel is benchmark, regulation according to International Electrotechnical Commission, calculate the x-ray radiation that makes wavelength 0.06nm and maintain the following x-ray radiation critical thickness (mm) of 0.5mR/h, thickness (mm) and the lightweight ratio (%) that lightweight can be used, and table 1 illustrate.The mensuration voltage of x-ray radiation, as shown in table 1, setting than reference voltage height.

Table 1

Distinguish	Measure voltage	Reference voltage	X-ray absorption coefficient 28～29cm of wavelength 0.06nm -1
							Centre of surface thickness	The x-ray radiation critical thickness	The lightweight available thickness	The lightweight ratio
			The cathode ray tube type	??kV	??kV	????mm					????mm	????mm	????％
??15”	??34.5	??32.5					????10.0	????9.21	????0.79	????8
			??17”	??37.0	??35.0	????11.0					????10.39	????0.61	????6
??19”	??37.0	??35.0					????11.0	????10.60	????0.40	????4
			??25”	??40.0	??36.0	????13.0					????11.09	????1.91	????15
??29”	??42.0	??36.0					????12.5	????10.69	????1.81	????14
			??32”	??42.0	??36.0	????13.0					????11.19	????1.81	????14

Look-up table 1 can find that the absorption coefficient to the X ray of wavelength 0.06nm is 28～29cm ^-1Panel, in order to satisfy the X ray exit dose, when lightweight is made, be benchmark with centre of surface thickness, have the lightweight ratio about 4～15%.Therefore, in order to alleviate the weight of panel, and allow the lightweight ratio be increased to more than 20%, then x-ray radiation exceeds standard, and can not satisfy the regulation of International Electrotechnical Commission.In addition, the absorption coefficient of the X ray of wavelength 0.06nm is more than or equal to 30cm ^-1Panel, with X-ray absorption coefficient be 28～29cm ^-1Panel compare, can improve the lightweight ratio.

In the cathode ray tube of the present invention, the X-ray absorption coefficient that attaches wavelength 0.06nm by the surface element at panel is 20～34cm ^-1Plate glass, can suppress the lightweight ratio of panel is increased because of reducing the x-ray radiation of the panel that centre of surface thickness increases, surpass present 4～15%.

Table 2

Distinguish	The X-ray absorption coefficient of wavelength 0.06nm
									????????????28～29cm -1Panel				??20cm -1Plate glass (5mm critical thickness where applicable)		??20cm -1Plate glass (2mm critical thickness where applicable)
	Centre of surface thickness	The x-ray radiation critical thickness	The lightweight available thickness	The lightweight ratio	Panel lightweight critical thickness	Panel lightweight ratio	Panel lightweight critical thickness	Panel lightweight ratio
									The cathode ray tube type	????mm	????mm	????mm	????％	????mm	????％	????mm	????％
?15”	??10.0	????9.21	????0.79	????8	????4.15	????42	????2.08	????21
									?17”	??11.0	????10.39	????0.61	????6	????4.06	????37	????1.99	????18
?19”	??11.0	????10.60	????0.40	????4	????3.85	????35	????1.78	????16
									?25”	??13.0	????11.09	????1.91	????15	????5.36	????41	????3.29	????25
?29”	??12.5	????10.69	????1.81	????14	????5.26	????42	????3.19	????26
									?32”	??13.0	????11.19	????1.81	????14	????5.26	????40	????3.19	????25

As shown in table 2, using the X-ray absorption coefficient of wavelength 0.06nm is 20cm ^-1Plate glass the time, when upper thickness limit was 5mm, can have existing X-ray absorption coefficient was 28～29cm ^-1The thickness of panel reduce the effect of 3.85mm at least, if use like this, can obtain to reduce the effect of 35～42% face-plate of a cathode-ray tube weight.When suitable thicknesses following was limited to 2mm, can have existing X-ray absorption coefficient was 28～29cm ^-1The thickness of panel reduce the effect of 1.78mm at least, if use like this, can obtain to reduce the lightweight effect of 16～26% face-plate of a cathode-ray tube weight.Also have simultaneously and improve the effect that panel is made productivity ratio.

Table 3

Distinguish	The X-ray absorption coefficient of wavelength 0.06nm
									????28～29cm -1Panel				??34cm -1Plate glass (when being suitable for the 5mm critical thickness)		??34cm -1Plate glass (2mm critical thickness where applicable)
	Centre of surface thickness	The x-ray radiation critical thickness	The lightweight thickness of having more than needed	The lightweight ratio	Panel lightweight critical thickness	Panel lightweight ratio	Panel lightweight critical thickness	Panel lightweight ratio
									Cathode ray tube	????mm	????mm	????mm	???％	????mm	????％	????mm	????％
???15”	????10.0	????9.21	????0.79	????8	????6.56	????66	????3.04	????30
									???17”	????11.0	????10.39	????0.61	????6	????6.47	????59	????2.95	????27
???19”	????11.0	????10.60	????0.40	????4	????6.26	????57	????2.74	????25
									???25”	????13.0	????11.09	????1.91	????15	????7.77	????60	????4.25	????33
???29”	????12.5	????10.69	????1.81	????14	????7.67	????61	????4.15	????33
									???32”	????13.0	????11.19	????1.81	????14	????7.67	????59	????4.15	????32

As shown in table 3, use the X-ray absorption coefficient of wavelength 0.06nm to be 34cm ^-1Plate glass the time, it can be 28～29cm with existing X-ray absorption coefficient that the upper limit 5mm of thickness has ^-1The thickness of panel be reduced by at least the effect of 6.26mm, if use like this, can obtain to reduce the lightweight effect of 57～66% face-plate of a cathode-ray tube weight.When suitable thicknesses following was limited to 2mm, having to be 28～29cm with having X-ray absorption coefficient ^-1The thickness of panel be reduced by at least the effect of 2.74mm, if use like this, can obtain to reduce the lightweight effect of 25～33% face-plate of a cathode-ray tube weight, also have simultaneously and improve the effect that panel is made productivity ratio.

In addition, usually, the explosion-resistance characteristic standard of the cathode ray tube of stipulating in International Electrotechnical Commission must be all qualified in pellet impact test (Ball impact test) and emission (projection) thing shock test (Missile impact test).And, according to the regulation of International Electrotechnical Commission, the surface element at panel is being attached the cathode ray tube of reinforcement with thin glass plate (Laminatedglass), can only carry out the pellet impact test.

As shown in Figures 1 and 2, cathode ray tube 10 of the present invention can not done the emitting substance shock test by attach the plate glass that has the lamination glass sheet concurrently on the surface element 21 of panel 20.So, can save desired time of emitting substance shock test and manpower, and then save producing cost, boost productivity.

In addition, the plate glass 50 that adheres on the surface element 21 of panel 20 can increase the intensity of cathode ray tube 10.And the ultraviolet hardening resin 51 that adopts for attached flat board glass 50 on the surface element 21 of panel 20 has damping characteristics, so the impulsive force that gives can relax spherical shock test the time.Therefore, in order to improve the lightweight ratio of panel 20, and when reducing thickness, also can be qualified fully in the pellet impact test because of plate glass 50 and ultraviolet hardening resin 51.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for the personnel with basic general knowledge of this area, the present invention can have various changes and variation.All under the situation that does not depart from the spirit and principles in the present invention, any modification of being done, be equal to replacement, improvement etc., all be included within the claim scope of the present invention.

The invention effect

As mentioned above, according to cathode-ray-tube panel of the present invention and adopt the cathode-ray tube of this panel, at the surface element attached flat board glass of panel, can effectively increase the ratio of clear quantification, can satisfy x-ray radiation and the explosion-resistance characteristic of International Electrotechnical Commission's defined. In addition, owing to adopted the structure of attaching plate glass that can inspection-free emitting substance impact test, effective weight reduction, the effect that acquisition is boosted productivity.

Symbol description

10 cathode-ray tubes

11 tubular axis

20 panels

21 surface elements

22 sealing strips

23 side edge parts

24 mix fillet part

30 funnels

31 sealing strips

32 bodies

33 yoke portions

40 necks

50 plate glass

51 ultraviolet hardening resins

Claims (4)

1. cathode-ray tube panel, side edge part that rearward extends by the surface element that is used for display image, from the periphery of described surface element and the mixing fillet part that connects described surface element and side edge part constitute,

When described panel is that absorption coefficient for the X ray of wavelength 0.06nm is 28～34cm ^-1, described surface element average outer surface curvature radius R (mm) when being the panel of R 〉=10,000, in order to suppress because of reducing the radiation of the described X ray that thickness produces, the absorption coefficient that is pasted with described X ray in the front of described surface element is 20～34cm ^-1Flat glass.

2. 1 described cathode-ray tube panel as requested, wherein, described plate glass is attached to the front of described surface element by ultraviolet curable resin.

3. cathode ray tube comprises: have the panel of the surface element of fluoroscopy images, at the funnel that connects later of described panel and the neck that is connected with the summit of described funnel, wherein,

When described panel is that absorption coefficient for the X ray of wavelength 0.06nm is 28～34cm ^-1, described surface element average outer surface curvature radius R (mm) when being the panel of R 〉=10,000, in order to suppress because of reducing the radiation of the described X ray that thickness produces, the absorption coefficient that is pasted with described X ray in the front of described surface element is 20～34cm ^-1Flat glass.

4. 3 described cathode ray tubes as requested, described plate glass is attached to the front of described surface element by ultraviolet curable resin.

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