公开(公告)号：US20090135333A1

公开(公告)日：2009-05-28

申请号：US12073485

申请日：2008-03-06

申请人： Ya-Hsiang Tai ,  Han-Ching Ho ,  Chia-Pin Cheng

发明人： Ya-Hsiang Tai ,  Han-Ching Ho ,  Chia-Pin Cheng

IPC分类号： G02F1/1335 ,  H05B37/02

CPC分类号： G01J1/46 ,  G01J1/4204 ,  G02F2201/58 ,  G09G3/3648 ,  G09G2300/0809 ,  G09G2360/144 ,  H01L27/1446 ,  H01L31/02019 ,  H01L31/112 ,  H01L31/147 ,  H01L31/153

摘要： The invention discloses an LCD with an ambient light sense function and its method. The method compraises the step of: coupling a capacitor to a source electrode of a thin film transistor; calculating a transmission time which required by a potential change from the reduction of electric charges; and finally, calculating an intensity of the ambient light according to the transmission time. The invention further discloses an ambient light sense circuit having a thin film transistor, a capacitor and a read-out switch. As the ambient light changes, a leakage current of the thin film transistor is changed accordingly, and the transmission time which required by the potential change is therefore changed. The read-out switch transmits said potential to a data read-out line in order to calculate the intensity of the ambient light from the transmission time. The LCD of this invention includes a plurality of capacitors, a plurality of read-out switches and a processing module.

摘要翻译： 本发明公开了一种具有环境光检测功能的LCD及其方法。 该方法包括以下步骤：将电容器耦合到薄膜晶体管的源电极; 计算由电荷减少引起的潜在变化所需的传输时间; 最后根据传输时间计算环境光的强度。 本发明还公开了具有薄膜晶体管，电容器和读出开关的环境光感测电路。 随着环境光的变化，薄膜晶体管的漏电流相应地改变，电位变化所需的传输时间因此改变。 读出开关将所述电位发送到数据读出线，以从传输时间计算环境光的强度。 本发明的LCD包括多个电容器，多个读出开关和处理模块。