Unverified80% confidenceDecision RuleTime unknown
3米外读数需要刻度或数字高度≥直径的1/8，纯几何简约款（无刻度）虽好看但远距离辨识度差，老人房不建议选无刻度款
1
Sources
80%
Confidence
Long-term
Relevance
-
First Seen
Sources
Related Entities
Related Claims
Unverified阅读书报选3x-5x放大倍数，配合大直径镜片（≥75mm）保证视野宽度；老年人日常读书首选3x左右，倍数过高反而导致视野过窄、扫读困难76% similarUnverified桌面倒计时摆件数字显示高度＜3cm在1米外几乎看不清读数，若用于办公桌激励或客厅陈设应选数字高度≥4cm的款式73% similarUnverified数字/字号高度需≥5cm才能保证3米外可读，宴会大厅或长桌场景建议8cm以上并选用高对比黑白配色73% similarUnverified标签读取距离受天线尺寸影响，25mm圆形贴读取距离约1-2cm需精准贴近，30mm以上或方形大天线读取更宽容；给老人小孩用或希望「随手一碰」的场景优先选大天线标签72% similarUnverified观看距离每增加1米，字号需增大约7-8mm可读性才达标；3米外阅读价格数字建议屏幕在32寸以上且分辨率≥1080P71% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/338691API
curl https://kongchang.com/api/v1/knowledge/claims/338691MCP
get_claim(id=338691)