1、o I EIA TEPLLO-A 85 3234600 O007458 5 W October 1985 Monochrome Cathode Ray Tube Bulb Criteria Formulated by EIA Tube Engineering Panel Advisory Council (TEPAC) TEPAC Publication No, 110-A NOTICE EIA Engineering Standards and Publications are designed to serve the public interest t,hrough eliminatin
2、g misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards and Pub- lications shall not in any
3、 respect preclude any member or non-member of EIA from manufacturing or selling products not conforming to such Standards and Publications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than EIA members, whether the standard is to be used eith
4、er domestically or internationally. Recommended Standards and. Publications are adopted by EIA without regard to whether or npt their adoption may involve patents on articles, materials, or processes. By such action, EIA does not assume any liability to any patent owner, nor does it assume any oblig
5、ation whatever to parties adopting the Recom- mended Standard or Publication. Published by ELECTRONIC INDUSTRIES ASSOCIATION Engineering Department 2001 Eye Street, N.W. Washington, D.C. 20006 PRICE: $12.00 Published in U.S.A. EIA TEPLLO-A 85 = 3234b00 00074b0 3 I HONOCHROME CATHODE RAY TUBE BULB CR
6、ITERIA RIA PUBLICATION TEP-110-A This publication was prepared by the JT-20 Committee on Electro- Optic Devices and approved by the Tube Engineering Panel Advisory Council (TEPAC), . PURPOSE This document establishes general quality criteria for monochrome CRT bulbs. General Quality Criteria No. 1,
7、2, and 3 were originally published in 1956 in JETEC Publication No. 10, which is no longer available; they are republished in this document without any revision or modification, because they have been incorporated by reference in other published materials. General Quality Criteria No. 4, while in us
8、e informally for many years, has not previously been formally published. It was adopted in its present form. by TEPAC in 1979 and is being formally published at this time. General Quality Criteria No. 5 was prepared by the JT-20 Committee and also approved for use in 1979 by TEPAC: it is being publi
9、shed here for the first time. (Ilr SCOPE The usual applicability of the five. General Quality Criteria is as established below: . Criteria - No. 1 - Monochrome (Black - . General Quality Criteria No, 1 .- . The following criteria, known as General Quaity Criteria No. 1 is usually applied to monochro
10、me picture.tube bulbs. It contains the following sections: I. Applicability II. Definitions IV. Criteria Outside Quality Area III. Criteria Within Quality Area V. Finish I . APPL1,CABILITY ,. 7 A general quality criteria is one which supplements one or more individual bulb criteria and one whose req
11、uirements shall be met in addition to those of the .individual bulb criteria. The applicable general quality criteria will be noted on the individual bulb criteria. When there is a difference between the requirements 6f the individual bulb criteria and the general quality criteria, the requirements
12、of the individual bulb criteria shall rule. II. DEFINITIONS 1. The equivalent diameter of an elongated defect (blisters, stones, etc) is length + width. 2 2. The quality area is defined as that area of the face which forms the screen area of a completed tube viewed parallel to the longitudinal axis
13、o the tube. For certain criteria items, the quality area is further divided into zones whose dimensions are given in the following table: Bulb Size Zone A Zone B 10“ Round 7“ Dia. Circle Remainder 12-1/2“ Round 8“ Dia. Circle Remainder 10“ - 14“ Rect. 5 II x 7 II Remainder 15“ - 19“ Rect. 5-1/2“ X 7
14、-3/4“ Remainder 20“ - 23“ Rect. 6-1/2“ x 8-3/4“ Remainder 24“ - 26“ Rect. 7-1/2“ X 10“ Rema inder Notes: 1. Major area of zone rectangle to coincide with major axis of face plate. 2. Centers of Zones “Al and “B“ to coincide with center of face plate. 3. Zone t91t - Area enclosed by Zone “B“ boundary
15、 dimensions less area of Zone “A“. L EIA TEPLLO-A 85 W 3234600 O007462 7 W -3- - CRITERIA WITHIN QUALITY AREA III. 1. 2“ DIAMETER CIRCLE LIMITATION (for Small Defects) Applicable to those defects with equivalent diameter over .010“ through .030“. Defects with equivalent diameter .010“ and under are
16、not considered. The allowable area, size and number of this type of defect are as follows: AREA - Any 2“ diameter circle. SIZE Stones and Opaque spots over .010“ through .025“ Seeds, blisters, etc. over .OIO1 through .030“. . NUMBER Total of 8, of which not more than 2 (seeds and blisters only) may
17、be over .025. 2. WIDTH AND LENGTH LIMITATION (For elongated type defects, such as closed blisters, stones and opaque spots etc.) Applicable to those defects with widths over .005“ through 020“. Defects with widths. 005“ and under are not considered. The allowable width and length by zone is given in
18、 the table below: - ZONE WIDTH A Over .00511 through .OIOgt A Over .010“ through .020g1 B Over .005“ through .010“ B Over . 0lOg1 through . 020“ MAXIMUM ALLOWABLE LENGTH 1-1/2“ 3/4“ Further qualified as follows: If the maximum allowable length, for those defects include above, is exceeded the bulb i
19、s rejectable. If the length, for those defects included above, is less than the maximum allowable length, compute the equivalent diameter. If this is .030“ or under, apply 2“ DIAMETER CIRCLE LIMITATION (Item 1). If this is over .030“, count as a defect under Item 3, maximum allowable defects in qual
20、ity area for entire bulb. The equivalent diameter, zone restrictions and minimum separation limits of item 3 do not apply. 0 EIA TEPLLO-A 5 M 3234600 0007463 9 M -4- III. CRITERIA WITHIN QUALITY AREA (continued) Open elongated blisters, on inside or outside surface, are considered on the basis of eq
21、uivalent diameter, regardless of length or width. 3. EQUIVALENT DIAMETER LIMITATION (For Large Type Defects) Applicable t,o all measurable defects not covered by Items 1 and 2, such as: Blisters, etc. with equivalent diameter over .030“ through .050“, and stones and opaque spots over .025“ through .
22、050“. . For smaller defects, see 2“ DIAMETER CIRCLE LIMITATION (Item 1). Larger defects are.not allowed. The allowable number and size of such def.eeets by zones are as follows: ZONE A Bulb sizes .lo“ through 26“ - None allowed. ZONE B Bulb Size Maximum Allowable Defects 10“ 15“ 20 24“ 4. 5. 6. 7. 8
23、. 9. lot1, 12-1/2“ Round 4 Total, of which only 1 may exceed .040“ - 14“ Rect. 4 Total, of which only 1 may exceed .040“ - 19“ 5 Total, of which only 1 may exceed .040“ - 23“ 6 Total, of which only 2 may exceed .040“ - 26“ 7 Total, of which only 3 may exceed .040“ The minimum separation for any two
24、defects (blisters- over .030“, and stones and opaque spots over .025“) shall be 3“. Adh,ered Glass - None permitted that cannot readily be removed. If adhered glass is removed, apply opaque spot limitations. Rust, Rouge and Unglazed Scale - None permitted that cannot be removed in washing process. B
25、ruises or Chips - None permitted that is readily identifiable to the unaided eye. Chill Wrinkle - (*) Cords - Buried oc Inside - (*) Dirty Mold - (*) 10. Mold Haze (Outside Surface) - (*) -5- III. CRITERIA WITHIN QUALITY AREA (continued) 11. Gob Mark (Inside Surface) - (*) O 12. Carbonized Mold - (*
26、) and shall not extend more than 1/4“ into the quality area. 13. 14. 15 16. 17. 18. 19. 20. 21. 22. 23. Pits - (*) . Laps (Inside Surface) - (*) oil Spots - (*) Scratch - Width of s002tt or under - Unlimited length Over .002“ through 004“ width, maximum length 1“ Over .004“ through .006“, width, max
27、imum length 1/2“ * Over .006“ width - None allowed. Spew - (*) Scuff - Shall be considered as an opaque spot, See Items 1, 2 and 3 for allowable number and size. Shear Mark - None permitted within the quality area on the inside or outside surface. Suck-up - Round Bulbs - (*) Rectangular Bulbs - (*)
28、intensity and location Color Streak - Cord - Shail be considered as opaque spot, see Items 1, 2 and 3 for allowable number and size. Tail - None permitted. Low density - color streak (*I Transmission .- the transmission of the center of the bulb face shall be the value shown on the individual bulb c
29、riteria. Chromaticity - In combination with the sulfide type standard P4 phoshor, with a color temperature of 7000K, the CIE coordinates at the center of the color hexagon shall be x= 0.3044, y=0.3177. The 6 corners of the color hexagon are at : - X .-y-.- .2996 .3129 .2996 .3161 .3060 -3225 .3092 -
30、3225 .3092 .3193 .3028 .3129 EIA TEPLLO-A 85 m 3234600 0007465 2 m IV. -6- CRITERIA OUTSIDE QUALITY AREA 1. Blisters - (0,030“ and under not considered) A. Buried - There shall be no blisters over 0,375“ round or 0.125“ x -1.250“ elliptical or 0.250“ x 0.75011 elliptical. There shall be no blisters
31、over 1.250“ in length. In any 2“ diameter circle, there shall be no more than 3.1 blisters over 0.030“ diameter or equivalent of which not more than 3 shall be over O.31Ot1 in diameter or equivalent and not more than 2 shall be over 0.750 in length. . B. Open - There shall be no blisters over 0.090“
32、 diameter or equivalent. There shall be no more than 3 open blisters in the sealed bulb. 2. Bruises - (*) There shall be .none visible to the unaided eye on the panel between the mold seam and the quality circle. 3. Stones - There shall be no stones over 0.220“. There shall be no exposed (not glazed
33、 over) stones over 0.030“ on outside glass surf ace. In the sealing zone - There shall be no stones over O. 015 There shall ne no more than 5 stones total. The separation shall not be less than 0.380“. 4. Checks - There shall no no checks or cracks of any degree beyond 1/4“ from the open end of the
34、neck other than mentioned under llbruises“. . 5. Chips - There shall be no chips on neck flare that extend more than 1/8“ from the edge. All chips visible to the unaided eye shall be glazed over. 6. Glass Knots - There shall be no knks over 0.190“ and they shall not proture more than 0.0301. 7. Laps
35、 - Radius - (*) Cast Funnels - All degrees of circumferential laps within 1“ of reference line 0.031“ to 0.062“ deep - 3 permitted, Iaps over 0.062“ deep are not acceptable. -7- IV. CRITERIA OUTSIDE QUALITY AREA (Continued) 8. Scale -There s-11 be no scale over 0.062“ diameter a 9. Scratch - Under .
36、002“ width - unlimited length .002“ through .004“ width - maximum length 2“ Over .004“ through .006“ width - maximum Over .006“ - not acceptable. . length 1/2“ 10. Scuff - Unlimited Length - (*) 11. Shear Mark - (*) 12. Face Funnel Splice - Round Bulbs - Not to extend beyond the maximum diameter of
37、the bulb. Rectangular Bulbs - 10“ and Smaller - Not to extend more than 1/32“ beyond mold match line at any point. Over 10 - Not to extend more than 1/16“ beyond mold match line at any point . V. FINISH !a - 1. The splice contours shall be as smooth outside and as free from sharp reentrant angles in
38、side as good commercial practice permits. 2. The flared.end of the neck shall be glazed. 3. The bulb shall be reasonably clean and free (inside as well as outside) from dust, oil, grease, or any other form of contamination which cannot be quickly removed by a standard washing method such as solution
39、 of 7% Hydrofluoric acid or equivalent. 4. Annealing - Good commercial. EIA TEPLLO-A 85 3234600 0007467 6 -. . -8- General Quality Criteria No, 2 The following criteria known as General Criteria No. 2 is usually applied to blown type earlier radar and industrial bulb types. It contains the following
40、 sections: I, Applicability II. Definitions IV. Criteria Outside Quality Area III. Criteria Within Quality Area V. Finish I, APPLICABILITY A general quality criteria is one which supplements one or more individual bulb criteria and one whose requirements shall be met in addition to those of the indi
41、vidual bulb criteria. The applicable general quality criteria will be noted on the individual bulb criteria. When there is a difference between the requirements of the individual bulb criteria and the general quality criteria, the requirements of the individual bulb criteria shall rule. II. DEFINITI
42、ONS The quality area is defined as that area of the face which forms the screen area of a completed tube viewed parallel to the axis of the tube. III .CRITERIA WITHIN QUALITY AREA 1. Blisters A. There are to be no soft or open blisters. B. Round or Elliptical Blisters Bulb Size Max Size Minimum With
43、in Any 2“ Circle Separation Up to 5-1/2“ 3/64“ 318“ Not more than 3 of size 2/64“ to 3/64“ Above 5-1/2“ 1/16“ 318 Not more than 3 from to 7“ 1/32“ to 1/16“, of which not more than 1 is to be from 3/64“ to 1/16“ Above 7“ to 9“ 5/64“ 3/8“ Not more than 3 from 1/32“ to 5/64“, of which not more than 1 i
44、s to be over 3/64“ b EIA TEPLLO-A 5 3234600 0007468 M -9- III. CRITERIA WITHIN QUALITY AREA (Continued) e 2. 3. 4. 5. 6. 7. 8. Seeds or Pits - Open o; Closed A. There are not to be more than 10 seeds of size 1/64“ to B. The prevalence of seeds or pits smaller than 1/64“.(*) 1/32 within any 2“ diamet
45、er circle. Stone-Scale-Glass Knot-Imbedded Dirt and Other Foreign Material A. Bulbs up to and Including 7“ Maximum size - 1/32 Withip any 2“ circle - not more than 5 of which not mQre Minimum separation - 3/8“ than 2 are to be over 1/64“. B. Bulbs above 7“ up to and Including 9“ Within quality circl
46、e - not more than 7 of 1/64“ to 1/16“1 of which not more than 2 are over 3/64“. Minimum separation - 318 Disregard spots under 1/64“ Rouge Spots - There are to be no rouge spots of any size on the inside or outside surface that cannot be removed in customers washing process. Scratch A. Length of any
47、 scratches is not to exceed 2“. B. Maximum intensity (*) . Scuff - Shall be considered as an opaque spot, see Item 3 for allowable number and size. Cords (Blown Bulbs) - Inside Cord - (*) . - Gather Cord - Outside surface - (*) Mold Ring and Marks (applies only to blown bulbs) A. Mold Marks (whorle
48、type) - (*) B. Mold Ring intensity - (*) C. Mold ring frequency - (*) EIA TEPLLO-A 85 m 3234600 00074b9 T W -10- III. CRITERIA WITHIN QUALITY AREA (Continued) 9. Dirty Mold - (*) 10. Bulls Eye Top (applies to machine blown bulbs only - (*) IV. CRITERIA OUTSIDE QUALITY AREA 1. Roundness - Different d
49、iameters of any cross section must not differ by more than 2% of the nominal diameter as indicated by the outline drawing. 2. Blisters A. There are to be no open blis.ters over 3/32“ in diameter or equivalent area and there are not to be more than 3 open blisters in any bulb. B. For bulbs up to and including 3“ in diameter. Limiting sizes of blisters shall be as follows: 3/32“ (round) 1/32“ x 3/16 (elliptical) 1/64“ x 9/32 (elliptical) , . 1/16“ x 1/8*! (elliptical) 9/32“ is the maximum length blister allowed regardless of the other dimensions. *.
