Patent ID: 6323833
Filing Date: 2001-11-27
Classification: G02B,G09G

Abstract:
A display-driving device for driving a display comprising an optical waveguide plate for introducing light thereinto, and a driving section provided opposingly to one plate surface of said optical waveguide plate and including a number of actuator elements arranged corresponding to a large number of picture elements, for displaying, on said optical waveguide plate, a picture image corresponding to an image signal by controlling leakage light at a predetermined portion of said optical waveguide plate by controlling displacement action of each of said actuator elements in a direction to make contact or separation with respect to said optical waveguide plate in accordance with an attribute of said image signal to be inputted;said display-driving device comprising a first driving circuit for selecting said actuator elements at least in one row unit, a second driving circuit for outputting displaying information to said selected row, and a signal control circuit for controlling said first and second driving circuits, wherein:a display period for one image is assumed to be one field and one divided period obtained by dividing said one field into a plurality of divided ones is assumed to be a subfield;an effective display period comprising a selection period and an unselection period is set for each subfield, said effective display period is set to have a temporal length corresponding to a unit gradation level allotted to said subfield; andsaid first and second driving circuits are controlled to perform gradation control at least in accordance with a temporal modulation system by using said signal control circuit.