This standard specifies the distance, horizontal oblique angle and elevation angle for watching teaching television, classroom lighting coefficient, average illumination and illumination uniformity of artificial lighting and other relevant requirements. This standard is applicable to classrooms in various schools at all levels in my country that use television as the main teaching method. Other types of classrooms equipped with televisions should also refer to it. GB 8772-1988 Hygienic standard for seating arrangement range and illumination in television classrooms GB8772-1988 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Seating arrangement and illumination in classroom with television
Hyglenic standards for. Seat arrangement and illumination in classroom with television1 Subject content and applicable model diagram
1.1 Subject content
UDC3872.621
：628.973
GB87T2-88
This standard specifies the distance, horizontal oblique angle and elevation angle for watching teaching television, classroom lighting coefficient, average illumination and uniformity of artificial lighting and other relevant requirements.
1.2 Scope of application
This standard applies to classrooms in various schools at all levels in my country that use television as the main teaching method. Other types of classrooms equipped with televisions should also be used as a reference.
2 Seat Arrangement Range
2.1 The horizontal distance from the front edge of the seat to the vertical plane of the TV screen is calculated as a multiple of the size of the TV tube, with a minimum of 4 to 5 times and a maximum of no more than 10 to 11 times.
2.2 The horizontal oblique angle of the student watching TV shall not exceed 45°. 2.8 The elevation angle of the student watching TV shall not exceed 30°. 3 Illumination
3.1 The minimum value of the natural lighting factor on the desk in the TV classroom shall not be less than 1.5%. 3.2 When using a TV for teaching, the average illumination of the artificial lighting on the desk should be 60±61x, and the uniformity of illumination should not be less than 0.7. 3.3 The lighting in the TV classroom should use fluorescent lamps as the light source, and no bare lamps should be used. The lower edge of the lamp should be no less than 1.7 to 2.0m away from the desk, and the lamp tube should be arranged so that its long axis is perpendicular to the blackboard surface.
3.4 ​​When calculating illumination in lighting design, the illumination compensation coefficient is 1.3. 3.5 Considering that the TV classroom also serves other purposes, the indoor lighting and blackboard lamps can be arranged according to the requirements of ordinary classrooms, and the control switches of lighting lamps should be set in groups according to different functional needs. 3.6 Illuminance measurement should be carried out using a cosine-corrected and color-corrected illuminometer, which must be calibrated. The measurement of daylighting and lighting should be carried out according to the methods of GB5699-85 "Daylighting Measurement Method" and GB5700-85 "Indoor Lighting Measurement Method" respectively. 3.7 The TV classroom should have measures to prevent the light source of the lamp from generating reflected glare on the screen. 3.8 The TV classroom must be equipped with darkening facilities and facilities for strengthening ventilation. 4 Glossary
Horizontal oblique angle for watching TVwwW.bzxz.Net
The angle at which the viewer deviates from the central axis of the TV screen in the horizontal direction (such as the α angle in Figure 1). Approved by the Ministry of Health of the People's Republic of China on February 22, 1988644
Implemented on December 1, 1988
4.2 Angle of elevation for watching TV
GB 8772—88
Figure 1 Horizontal oblique angle for watching TV
The angle between the viewer's horizontal line of sight and the center of the TV screen (such as angle β in Figure 2). Figure 2
4.3 Illumination uniformity
Angle of elevation for watching TV
The ratio of the minimum illumination to the average illumination on the desk in the classroom. 4.4 Darkening facilities
Facilities for blocking natural light from entering the classroom during TV teaching. Such as electric or manual blackout curtains (curtain boxes are required) or blackout ventilation blinds.
GB8772-88
Appendix A
Facilities for preventing reflected glare on television sets
(reference)
There are many measures to prevent the light source of the lamp from generating reflected glare on the television screen. One of them is to add a shading plate to the TV housing (as shown below). This plate is made of opaque material, and its forward extension length is inversely proportional to the height of the lamp from the TV. Adding a shading plate to the TV housing
Additional instructions:
This standard was proposed by the School Health Standards Subcommittee of the National Health Standards Technical Committee. This standard was drafted by West China University of Medical Sciences. This standard is interpreted by the Institute of Child and Adolescent Health of Beijing Medical University, the technical coordination unit entrusted by the Ministry of Health. 646
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