DB35/T 1304-2017 English PDF (DB35T1304-2017)

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DB35/T 1304-2017: Technical specification for LED panels
DB35/T 1304-2017
DB35
FUJIAN PROVINCIAL LOCAL STANDARD
ICS 31.120
L 53
Replacing DB35/T 1304-2012
Technical specification for LED panels
ISSUED ON. MAY 05, 2017
IMPLEMENTED ON. AUGUST 05, 2017
Issued by. Fujian Provincial Administration for Market Regulation
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 6
4 Classification... 6
5 Requirements... 7
6 Inspection and test methods... 17
7 Inspection rules... 23
8 Marking, packaging, transportation and storage... 27
Technical specification for LED panels
1 Scope
This Specification specifies the terms and definitions, classification, inspection
methods, inspection rules, as well as marking, packaging, transportation and storage
requirements for LED panels.
This Specification applies to flat-panel LED panels with a dot pitch of 0.7 mm or more.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 191, Packaging -- Pictorial marking for handling of goods
GB/T 2423.1, Environmental testing for electric and electronic products - Part 2.
Test methods - Tests A. Cold
GB/T 2423.2, Environmental testing for electric and electronic products - Part 2.
Test methods - Tests B. Dry heat
GB/T 2423.3, Environmental testing - Part 2.Testing method - Test Cab. Damp heat,
steady state
GB/T 2423.17, Environmental testing for electric and electronic products - Part 2.
Test method - Test Ka. Salt mist
GB/T 4208, Degrees of protection provided by enclosure (IP code)
GB 4943.1, Audio/video, information and communication technology equipment -
Part 1.Safety requirements
GB/T 5080.7, Equipment reliability testing. Compliance test plans for failure rate
and mean time between failures assuming constant failure rate
GB/T 6388, Transport package shipping mark
GB/T 6587-2012, General specification for electronic measuring instruments
GB/T 9254, Information technology equipment - Radio disturbance characteristics
- Limits and methods of measurement
GB/T 17618, Information technology equipment -- Immunity characteristics --
Limits and methods of measurement
SJ/T 11141-2012, Generic specification for LED displays
SJ/T 11281-2007, Measure methods of light emitting diode (LED) displays
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in SJ/T 11141,
SJ/T 11281 as well as the followings apply.
3.1 LED Screen
It is composed of one or several display modules and can be controlled by a display
control system to complete the picture display.
3.2 Display Control System
It is usually composed of a video processor, a signal conditioning transmitter, a signal
receiving distributor, and related playback control and display software. It can also
include various signal sources and a matrix switcher.
3.3 Transmission System
In the display system, the signal to be displayed is transmitted to the signal transmission
part of each panel unit.
3.4 Auxiliary System
Supporting equipment for LED panels. Usually, it includes power supply and
distribution system, audio system, temperature control system, lightning protection
system and security system, etc.
3.5 Small Pitch LED Displays
LED indoor (outdoor) panels with a dot pitch of no more than 2.5 mm (4.0 mm) are
collectively referred to as indoor (outdoor) small pitch displays.
3.6 Standard Pitch LED Displays
LED panels with pitches other than small pitch displays, i.e. LED indoor (outdoor)
panels with dot pitches greater than 2.5 mm (4.0 mm).
4 Classification
4.1 Classification by use environment
It is divided into indoor LED panels and outdoor LED panels.
4.2 Classification by display color
It is divided into monochrome, dual-color and full-color LED panels.
4.3 Classification by LED packaging method
It is divided into direct-insertion (DIP) LED panels, surface-mount LED panels and dot
matrix module panels.
4.4 Classification by display function
It is divided into text LED panels, graphic LED panels, video LED panels and special
application LED panels.
4.5 Classification by pixel pitch
It is divided into standard pitch LED displays, small pitch LED displays, etc.
5 Requirements
5.1 Design and structure
5.1.1 Hardware
When designing LED panels, reliability, environmental adaptability, safety, and
electromagnetic compatibility shall be designed. The design of serialized products shall
comply with the provisions of relevant standards.
5.1.2 Software
The configured software shall be compatible with the hardware resources of the
hardware system. In addition to meeting the application functions, it shall also be
equipped with corresponding maintenance and testing procedures. The character set
encoding and fonts shall comply with the relevant national standards.
5.1.3 Structure
5.1.3.1 The text, symbols and signs on the surface of the LED panel that describe the
functions shall be clear, correct, firm and comply with the relevant national standards.
5.1.3.2 Commonly used pixel center distances are. 0.7, 1.0, 1.5, 1.667, 1.923, 2.0, 2.5,
3.0, 4.0, 5, 6, 7.62, 8, 10, 16, 20, etc. The unit is millimeter.
5.2 Hardware environment
The hardware part of LED panel includes control part, communication part, display part,
5.10.1 Radio harassment
The radio disturbance limit of LED panels shall comply with the provisions of GB 9254.
The product specification shall clearly specify the use of the radio disturbance limit
specified in Class A or Class B.
5.10.2 Noise immunity
The immunity limit shall comply with the requirements of GB/T 17618.
5.11 Environmental adaptability
5.11.1 General
After each test, the test samples shall be inspected to meet the following requirements.
a) The functional characteristics of the test samples shall comply with the
requirements of 5.5;
b) The ratio of the total number of out-of-control pixels of all test samples in an
inspection batch to the total number of pixels in the batch shall comply with the
requirements for the pixel out-of-control rate of the entire screen in Table 17.
5.11.2 High temperature operation
Recommended high temperature working environment temperature.
a) Indoor LED panel
40℃.
b) Outdoor LED panel
50℃.
Power on and work for 8 h.
5.11.3 Low temperature operation
Recommended low temperature working environment temperature.
a) Indoor LED panel
0℃.
b) Outdoor LED panel
-30℃, -20℃, -10℃, 0℃.
Power on and work for 8 h.
The transportation test for display modules is carried out in accordance with the three-
level circulation conditions specified in GB/T 6587-2012.
5.11.8.2 LED panel transportation test
Unless otherwise specified, transportation tests shall be carried out on mobile LED
panels.
5.11.9 Corrosion resistance (salt spray test)
For outdoor LED panels, the experimental temperature. 35±2℃; NaCl concentration.
(5±0.1)%; pH value. 6.5～7.2; spray volume. 1 mL～2mL/h. Carry out salt spray test.
Test time. 16, 24, 48, 96, 168, 336, 672 h.
After the test, the protective layer of the sample shall not show signs of peeling, rust...