发明名称 |
Light-emitting device and control method of the same |
摘要 |
A light-emitting device control method is provided. The light-emitting device control method comprises the steps outlined below. A light-emitting module of a light-emitting device having light-emitting unit string each having light-emitting units connected in series is operated. One end of each light-emitting unit strings receives a same DC voltage. A voltage drop value across each current control units connected in series to at least one of the light-emitting unit strings is retrieved to further determine whether the light-emitting unit of each of the light-emitting unit strings malfunctions. When x light-emitting units of a specific string malfunction and x is larger than or equal to a malfunction threshold value p, the x malfunctioned light-emitting units are shorted and (x−p+1) light-emitting units in each of the light-emitting unit strings other than the specific string are shorted. The DC voltage received by each of the light-emitting units is decreased. |
申请公布号 |
US8922123(B2) |
申请公布日期 |
2014.12.30 |
申请号 |
US201313954070 |
申请日期 |
2013.07.30 |
申请人 |
Delta Electronics, Inc. |
发明人 |
Liu Bao-Kim;Hsiao Ting-Lung |
分类号 |
H05B37/03;H05B33/08 |
主分类号 |
H05B37/03 |
代理机构 |
Lowe Hauptman & Ham, LLP |
代理人 |
Lowe Hauptman & Ham, LLP |
主权项 |
1. A light-emitting device, comprising:
a light-emitting module, comprising a plurality of light-emitting unit strings, each of the light-emitting unit strings comprising a plurality of light-emitting units connected in series, wherein an end of each of the light-emitting unit strings receives a same DC voltage; a light adjustment control bus, comprising a plurality of current control units, each being connected in series to at least one of the light-emitting unit strings, so as to control a current of each of the light-emitting unit strings; a control module, configured to retrieve a voltage drop value across each of the current control units, so as to further determine whether the light-emitting units in each of the light-emitting unit strings malfunction; and when the light-emitting units of a specific string among the light-emitting unit strings malfunction, and the number x of malfunctioned light-emitting units is larger than or equal to a malfunction threshold value p, the control module shorts the malfunctioned light-emitting units in the specific string and shorts (x−p+1) light-emitting units in each of the light-emitting unit strings other than the specific string, so as to decrease the DC voltage received by each of the light-emitting unit strings. |
地址 |
TW |