This standard specifies terms and definitions, grading, requirements, test methods, inspection rules, packaging, marking, transportation and storage of thin float glass for liquid crystal display (LCD) applications.
This standard is applicable to soda-lime-silica thin float glass for TN-LCD and STN-LCD with thickness not greater than 1.10mm.
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 1216 External Micrometer
GB/T 2680 Determination of Light Transmittance, Solar Direct Transmittance, Total Solar Energy Transmittance and Ultraviolet Transmittance for Glass in Building and Related Glazing Factors
GB/T 2828.1-2012 Sampling Procedures for Inspection by Attributes - Part 1: Sampling Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-lot Inspection
GB/T 8170 Rules of Rounding Off for Numerical Values & Expression and Judgment of Limiting Values
GB/T 9056 Metal Ruler
GB 11614-2009 Flat Glass
GB/T 15764 Standard Terminology of Flat Glass
GB/T 18680-2002 The Transparent Conductive Glass with Indium-in Oxide Films Used in Liquid Crystal Display
JB/T 2369 Reading Microscope
SJ/T 10793 Terms for Glass Used in Electronic Applications
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB 11614-2009, GB/T 15764, GB/T 18680-2002 and SJ/T 10793 and the following apply.
3.3
edge defects
phenomena such as section crack, protruding or mutilation of glass sheet, etc., including defects like broken edge, edge unevenness, broken corner, etc.
3.4
micro-waveness
minor unevenness degree of glass surface
3.5
warp
noncoincidence between glass surface and reference plane, expressed by warp degree
4 Grading
The glass is classified into Grade A and Grade B according to different quality requirements.
5 Requirements
5.1 Dimension deviation and diagonal difference
Thin float glass for liquid crystal display (LCD) applications shall be cut into rectangle with dimension deviation of length and width not exceeding ±2mm and diagonal difference not greater than 0.2%.
5.2 Thickness deviation and thickness difference
GB/T 20314-2017 The following standards are cited：
