T/JYBZ 029-2024 Liquid crystal interconnection writing board technology specification

Scope

Scope: This document specifies the terms and definitions, technical requirements, testing methods, inspection rules, marking, packaging, transportation and storage, and installation and debugging requirements for LCD interactive writing boards. This document applies to LCD interactive writing boards used in ordinary classrooms, laboratories, and other specialized classrooms in schools at all levels and types. Other LCD interactive writing boards used for teaching activities, communication, note-taking, and promotion can be referenced for use. Main technical content: The standard consists of eight chapters, including scope, normative references, terms and definitions, technical requirements, testing methods, inspection rules, marking, packaging, transportation and storage, and installation and debugging requirements. The main contents include: 1. Usage environment: The LCD interactive writing board should be able to operate in an indoor environment with a temperature of 10℃～40℃ and a relative humidity of no more than 90%, avoiding exposure to sunlight and rain. When the illuminance of the writing surface of the LCD interactive writing board is less than 500 lx, an external light source should be provided. 2. Writing performance: The LCD interactive writing board should be used with a dedicated writing pen, with a writing pressure of 2 N～3 N. The writing strokes should be smooth, uniform, clearly visible, and without line breaks. There should be no delay in the display of the writing strokes. The number of writing times on the LCD interactive writing board should be no less than 100,000. The positioning accuracy of the writing strokes on the LCD interactive writing board should be no more than 1 mm. The retention time of the writing strokes on the LCD interactive writing board should be more than 30 days. 3. Erasure function: The LCD interactive writing board should have a one-key erasure and local erasure function, powered by batteries or external power sup

Development Information

Related Standards