PROJECTION DISPLAY APPARATUS HAVING AN OPTICAL ELEMENT PROJECTING MODULATED LIGHT, METHOD FOR CONTROLLING THE SAME, AND ELECTRONIC DEVICE

摘要

An image display apparatus includes a light-source driving circuit that drives a light source to cyclically change brightness. A control unit controls a pixel to turn on and off over a plurality of subfields in a field so that transmittance or reflectance in the pixel over the plurality of subfields in the field corresponds to a gray level specified for the pixel. The control unit also arranges the plurality of subfields such that two or more gray-level defining subfields maintain a predetermined relationship with respect to the cyclical change in brightness of the light source caused by drive of a light-source driving circuit.

主权项

1. A projection display apparatus, comprising:
a light source that emits light; a light-source driving circuit that drives the light source so that an amount of change of a brightness of the light per unit time cyclically changes; a first light modulation element that modulates the light into a first modulated light corresponding to a first image data at each of a first combination of subfields in a field; a second light modulation element that modulates the light into a second modulated light corresponding to a second image data at each of a second combination of subfields in the field; and an optical element that (i) combines the first modulated light with the second modulated light into a combined light and (ii) projects the combined light, the first combination of subfields including a first subfield and a second subfield, the second subfield being longer than the first subfield, the second combination of subfields including a third subfield and a fourth subfield, the fourth subfield being longer than the third subfield, the amount of change of the brightness of the light per unit time including a first amount of change and a second amount of change, the second amount of change being different than the first amount of change, and the first subfield and the third subfield being arranged at a position corresponding to a timing when the amount of change of the brightness of the light per unit time changes from the first amount of change to the second amount of change.