GB/T 5838.45-2015Phosphors—Part 4-5: Phosphor for color display tubes (English PDF)

Foreword

The GB/T 5838 Phosphors series of national standards includes the following parts.

---Part 1: Terminology;

---Part 2: Types;

---Part 3: Test Methods for Properties;

---Part 4-1.Phosphor for Black-white Picture Tubes;

---Part 4-2.Phosphor for Indicator Tubes;

---Part 4-3.Phosphor for Oscilloscope Tubes and Display Tubes;

---Part 4-4.Phosphor for Color Picture Tubes;

---Part 4-5.Phosphor for Color Display Tubes. This Part is Part 4-5 of GB/T 5838.

This Part was drafted in accordance with the rules provided in GB/T 1.1-2009.

This Part serves as a replacement of GB/T 11496.1-1989 Phosphor Y30-G1 for Color Display Tubes, GB/T 11496.2-1989 Phosphor Y30-B1 for Color Display Tubes and GB/T 11496.3-1989 Phosphor Y30-R1 for Color Display Tubes.

In comparison with GB/T 11496.1 ~ 11496.3-1989, this Part has the following main changes.

---The three standards GB/T 11496.1 ~ 11496.3 were integrated into one standard;

---The medium particle is deleted from Chapter 1;

---Chapter 3 - Terms and Definitions is added;

---The test of luminous efficiency is modified into the test of relative brightness (see 4.5 and 5.4; 4.4 of Version 1989);

---The composition, crystallographic form, appearance and luminous color in Chapter 3, and the technical indicators in Chapter 2 of the original standards GB/T 11496.1 ~ 11496.3-1989 are merged into the requirements of Chapter 4 in this Part. In addition, the three phosphors Y30-G1, Y30-B1 and Y30-R1 are integrated;

---The indicator of density is adjusted (see 4.8; 4.8.1 or 4.9.1 of Version 1989);

---"Chrominance coordinates" is modified into "chromaticity coordinates", and the excitation voltage in the test methods is modified (see 5.3; 4.3 of Version 1989); Phosphors - Part 4-5.Phosphor for Color Display Tubes

1 Scope

This Part specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage of Y30-G1, Y30-B1 and Y30-R1 phosphors.

This Part is applicable to phosphors for color display tubes.

2 Normative References

The following documents are indispensable to the application of this document. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document.

GB/T 191 Packaging - Pictorial Marking for Handling of Goods

GB/T 31418.3-2015 Phosphors - Part 3: Test Methods for Properties

GB/T 5838 Terms for Phosphors

3 Terms and Definitions

The terms and definitions defined in GB/T 5838 are applicable to this document.

4 Requirements

5 Test Methods

6 Inspection Rules

6.1 The manufacturer's inspection department shall inspect each batch of products in accordance with the stipulations of 5.1 ~ 5.5. Only products that pass the inspection can be allowed to exit the factory.

6.2 Within three months from the date of receipt, the manufacturer shall randomly take 200 g of sample from each batch of phosphors and conduct a re-inspection in accordance with the stipulations of 5.1 ~ 5.5. If it is disqualified, then, it will be handled through negotiation between the demand-side and the supply-side, and when necessary, arbitration can be conducted by a third party.

6.3 The phosphor products of the same designation and produced from the same raw materials and under the same process conditions, and submitted for inspection at one time are considered to be one batch. Each batch of products shall be no less than 5 kg. Under special circumstances, the batch size shall be determined through negotiation between the demand-side and the supply-side.

7 Markings

A label with the trademark shall be attached to the packaging container of the phosphors, and the label shall include the following contents.

a) Designation of the phosphors;

b) Batch No.;

c) Net mass;

d) Production organization;

e) Production date;

f) Markings that comply with the provisions of GB/T 191 for Avoid Sun Exposure, Keep Away from Radiation and Keep Away from Rain.

8 Packaging, Transportation and Storage