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SJ/T 11987-2025 Education and Business Projector Specification

Full Standard Name

General Specification for Front Projector — Projector for Education and Business

SJ/T 11987-2025 General Specification for Front Projector — Projector for Education and Business

Standard Details

Sector / Industry Electronics
Standard Type SJ/T (Recommended)
Standard Status Valid
Older Standard None
CCS Classification M74
ICS Classification 33.160.25
Issue Date 2025-05-09
Implementation Date 2025-08-01
File Type PDF
PDF Page Count About 29 pages
Competent Department National Technical Committee on Audio, Video and Multimedia Systems and Equipment of Standardization Administration of China
Quoted Standard GB/T 191, GB/T 2828.1, GB/T 2829, GB 4943.1, GB/T 5465.2, GB/T 9254.1, GB/T 9254.2, GB/T 14960

SJ/T 11987-2025 (English Version)

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SJ/T 11987-2025 (Chinese Version)

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Standard Introduction

This standard applies to projectors used in teaching, training, business meetings and office environments. Display performance requirements include illuminance uniformity (>=80%), contrast (>=150:1), on-off ratio (>=500:1), colour light output ratio (>=50%), colour gamut coverage (>=24% for halogen, >=27% for solid-state light sources) and red light ratio (>=5%). 

The document also specifies on-off ratio (>=500:1 for education/business vs >=1000:1 for engineering projectors per SJ/T 11986) as a key differentiator. Functional requirements distinguish between smart and feature projectors, with optional extras such as electronic whiteboard support, Bluetooth, sound output, multi-screen interaction, altitude adaptation and built-in educational software.

Standard Catalog

The standard consists of the following main sections:

  • 1 Scope 1

  • 2 Normative References 1

  • 3 Terms and Definitions 1

  • 4 Classification 2

  • 5 Basic Requirements 2

  • 5.1 Operating Conditions 2

  • 5.2 Graphical Symbols 2

  • 6 Technical Requirements 2

  • 6.1 Appearance and Structure 2

  • 6.2 Functions 3

  • 6.3 Display Format 3

  • 6.4 Interfaces 4

  • 6.5 Display Performance 4

  • 6.6 Noise 5

  • 6.7 Remote Control Reception Performance 5

  • 6.8 Remote Control Transmission Performance 5

  • 6.9 Projection Efficiency 5

  • 6.10 Power Consumption 5

  • 6.11 Electromagnetic Compatibility 6

  • 6.11.1 Radiated and Conducted Emission 6

  • 6.11.2 Harmonic Current Emission 6

  • 6.11.3 Voltage Changes, Fluctuations and Flicker 6

  • 6.11.4 Immunity 6

  • 6.12 Safety 6

  • 6.12.1 General Requirements 6

  • 6.12.2 Optical Radiation Safety 6

  • 6.13 Reliability 6

  • 6.14 Environmental Adaptability 6

  • 6.15 Unpacking Inspection 6

  • 6.16 Workmanship and Assembly 6

  • 6.17 Product Instructions 6

  • 7 Test Conditions and Methods 7

  • 7.1 Appearance and Structure 7

  • 7.2 Functions 7

  • 7.3 Display Format 7

  • 7.4 Interfaces 7

  • 7.5 Display Performance 7

  • 7.6 Noise 8

  • 7.7 Remote Control Reception Performance 8

  • 7.8 Remote Control Transmission Performance 8

  • 7.9 Projection Efficiency 8

  • 7.10 Power Consumption 8

  • 7.11 Electromagnetic Compatibility 8

  • 7.12 Safety 8

  • 7.12.1 General Requirements 8

  • 7.12.2 Optical Radiation Safety 8

  • 7.13 Reliability 8

  • 7.14 Environmental Adaptability 8

  • 7.15 Unpacking Inspection 9

  • 7.16 Workmanship and Assembly 9

  • 7.17 Product Instructions 9

  • 7.18 Environmental Protection 9

  • 8 Inspection Rules 9

  • 8.1 Inspection Classification 9

  • 8.2 Type Approval Inspection 9

  • 8.2.1 Purpose 9

  • 8.2.2 Inspection Items 9

  • 8.2.3 Sampling and Sample Size 10

  • 8.2.4 Non-Conformity Classification and Criteria 10

  • 8.2.4.1 Non-Conformity Classification 10

  • 8.2.4.2 Non-Conforming Product Classification 10

  • 8.2.4.3 Non-Conformity Criteria 10

  • 8.2.5 Acceptance and Rejection Determination 11

  • 8.3 Acceptance Inspection 12

  • 8.3.1 Purpose 12

  • 8.3.2 Inspection Items 12

  • 8.3.2.1 Unpacking Inspection 12

  • 8.3.2.2 Workmanship and Assembly Inspection 12

  • 8.3.2.3 Performance Inspection 12

  • 8.3.3 Sampling Plan 14

  • 8.3.4 Non-Conformity Classification and Criteria 14

  • 8.3.5 Acceptance Inspection Determination 15

  • 8.3.6 Handling of Inspection Results 15

  • 8.4 Routine Inspection 15

  • 8.4.1 Purpose 15

  • 8.4.2 Inspection Period 15

  • 8.4.3 Inspection Items 15

  • 8.4.4 Sampling Plan 16

  • 8.4.5 Non-Conformity Classification and Criteria 16

  • 8.4.6 Sampling 17

  • 8.4.7 Routine Inspection Determination 17

  • 8.4.8 Handling of Inspection Results 17

  • 9 Marking, Packaging, Transportation and Storage 17

  • 9.1 Marking 17

  • 9.2 Packaging 17

  • 9.3 Transportation 17

  • 9.4 Storage 17

  • Appendix A (Normative) Unpacking Inspection Contents and Non-Conformity Criteria 18

  • Appendix B (Normative) Workmanship and Assembly Inspection Contents and Non-Conformity Criteria 21

  • Appendix C (Normative) Technical Elements in Product Instructions 22

  • Appendix D (Normative) Environmental Adaptability Contents and Non-Conformity Criteria 23

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