Invention Grant
- Patent Title: Light emitting device array billboard and control method thereof
- Patent Title (中): 发光元件阵列广告牌及其控制方法
-
Application No.: US14539082Application Date: 2014-11-12
-
Publication No.: US09107265B2Publication Date: 2015-08-11
- Inventor: Shui-Mu Lin , Chien-Hua Lin , Ching-Yu Chen , Chin-Hui Wang , Yung-Chun Chuang , Ti-Ti Liu
- Applicant: Shui-Mu Lin , Chien-Hua Lin , Ching-Yu Chen , Chin-Hui Wang , Yung-Chun Chuang , Ti-Ti Liu
- Applicant Address: TW Zhubei, Hsinchu
- Assignee: RICHTEK TECHNOLOGY CORPORATION
- Current Assignee: RICHTEK TECHNOLOGY CORPORATION
- Current Assignee Address: TW Zhubei, Hsinchu
- Agency: Tung & Associates
- Main IPC: H05B37/02
- IPC: H05B37/02 ; H05B33/08

Abstract:
The present invention discloses a light emitting device array billboard and a control method thereof. The light emitting device array billboard includes a light emitting device array circuit, plural line switch circuits, plural channel switch circuits, plural ghost image compensation switch circuits, and a control circuit. The control circuit operates the line switch circuits and the channel switch circuit to turn ON a selected light emitting device for a duty period in a lighting period, and operates the plural ghost image compensation switch circuits to electrically connect a channel node corresponding to the selected light emitting device to a ghost image compensation voltage after the lighting period. The control circuit further adjusts a channel operation signal according to a gray scale compensation signal, to turn ON the selected light emitting device for a gray scale compensation period in addition to the duty period.
Public/Granted literature
- US20150156829A1 Light Emitting Device Array Billboard and Control Method Thereof Public/Granted day:2015-06-04
Information query