ACTIVE MATRIX DISPLAY DEVICES

申请公布号：

WO2007020576(A1)

申请号：

WO2006IB52769

申请日期：

2006.08.10

申请公布日期：

2007.02.22

申请人：

KONINKLIJKE PHILIPS ELECTRONICS N.V.;DEANE, STEVEN, C.;FRENCH, IAN, D.;KNAPP, ALAN, G.;COLLINS, PAUL;FISH, DAVID, A.

发明人：

DEANE, STEVEN, C.;FRENCH, IAN, D.;KNAPP, ALAN, G.;COLLINS, PAUL;FISH, DAVID, A.

分类号：

G09G3/34;G09G3/38

主分类号：

G09G3/34

摘要：

<p>A display device comprises an array of rows and columns of pixels disposed over a common substrate. Each pixel comprises a display pixel element having a stable drive state in which the optical characteristics remain substantially constant and a drive circuit for controlling the voltage applied to the display pixel element. An optical sensor arrangement of each pixel (PR1, R2) detects an optical signal dependent on the setting of the display pixel element, and the drive circuit comprises an optical feedback control system which is arranged to drive the display pixel element to the stable display state in response to an applied input pixel voltage and an output of the optical sensor arrangement, the optical characteristics being varied before the drive of the display pixel element reaches the stable state and being held substantially constant once the stable state has been reached. This approach removes the need to apply complicated voltage control schemes to the display element. Instead, a desired brightness is loaded into the pixel (as a voltage level), and optical feedback within the pixel is used to achieve the desired brightness level.</p>