成人试看120秒体验区,久久久久久久99精品国产片,久久精品免视看国产成人,亚洲国产精品一区二区第一页

Welcome to Hangzhou Huatai Intelligent Technology Co., Ltd.!
Language:

Full color LED display quality judgment standard

Full color LED display quality judgment standard

1.Smoothness

LED display surface roughness to within ± 1mm to ensure that the display image does not occur distorted, local highlights or recession will lead to LED display viewing angle of the dead angle. The degree of flatness is determined by the production process.

2. Brightness and viewing angle

Indoor full color LED display brightness to 800cd / m2 above, outdoor full color LED display brightness to 1500cd / m2 or more, in order to ensure the normal work of the display, otherwise it will be too bright because the brightness is not clear display Image. The brightness of the size of the LED die is mainly determined by the good or bad.

The size of the visual angle directly determine the number of LED display audience, so the bigger the better. The viewing angle is mainly determined by the way the die is encapsulated.

3. White balance effect

White balance effect is one of the most important indicators of LED display. Color when the red, green and blue primary colors ratio of 1: 4.6: 0.16 will show a pure white, if the actual ratio of a little deviation will appear white balance deviation, generally have to pay attention to whether the white blue, partial Yellow-green phenomenon. White balance is mainly determined by the control system to determine the screen, the color of the reductive also affected.

4. The reduction of color

Color reduction is the LED display on the color of the reduction, both the display screen to play with the color of the source to maintain a high degree of consistency, so as to ensure the image of the realism.

5. whether the mosaic, dead phenomenon

Mosaic refers to the LED display on the bright or often black small square box, both the module necrosis, the main reason for the LED display used by the connector quality is not related.

Death point refers to the LED display on the bright or often black single point, the number of dead spots mainly by the die is good or bad to decide.

6. No color blocks

Color block is a significant difference between adjacent modules, the color of the transition to the module as a unit, causing the color phenomenon is mainly due to poor control system, gray level is not high, the scanning frequency caused by low.

无码人妻精品一区二区三区下载| 真实国产老熟女粗口对白| 久久无码人妻一区二区三区午夜 | 内射无码专区久久亚洲| 极品人妻老师的娇喘呻吟| 久久www免费人成人片| 4hu四虎永久在线观看| 国产成人av一区二区三区在线| 无码国产精品一区二区免费16| 朝鲜女子内射杂交bbw| 色爱无码av综合区| 无码人妻精品中文字幕免费东京热| 少妇被粗大的猛烈进出视频| 亚洲av无码成人黄网站在线观看| 亚洲人成电影网站色| 国产精品免费视频网站| 无码精品黑人一区二区三区| 日本特黄特色特爽大片| 欧美性猛交xxxx黑人猛交| 亚洲熟妇无码八av在线播放| 十八禁视频网站在线观看| 美女把尿囗扒开让男人添 | 毛茸茸厕所偷窥xxxx| 精品国产一二三产品区别在哪| 无码精品视频一区二区三区| 99久久综合狠狠综合久久| 精品人妻系列无码一区二区三区 | 免费人成网站在线观看欧美| 精品久久无码中文字幕| 成人年无码av片在线观看 | 法国白嫩大屁股xxxx| 中文成人无码精品久久久不卡| 大地资源在线播放观看mv| 亚洲欧洲中文日韩久久av乱码| 黑人大荫道bbwbbb高潮潮喷| 中文字幕一区二区三区乱码| 国产精品无码无卡无需播放器 | 人妻av乱片av出轨| 国产乱人伦偷精品视频不卡| 亚洲国产精品无码久久久| 国产无套内射久久久国产|