Pixel circuit with large and small OLED elements connected to a single driving transistor wherein the large OLED element is further controlled by a memory circuit within the pixel
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United States of America Patent
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Jul 18, 2017
Grant Date -
May 28, 2015
app pub date -
Nov 25, 2014
filing date -
Nov 26, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
An organic EL display device includes a first pixel circuit for displaying a first color. The first pixel circuit includes a large light emitting element, a small light emitting element, and a current control circuit that controls whether a current is supplied to the small light emitting element and the large light emitting element or not respectively, and the amount of the current to be supplied to at least one of the small light emitting element and the large light emitting element, according to a tone to be displayed by the first pixel circuit. The current control circuit supplies the current to the small light emitting element if the tone is equal to or smaller than a threshold value, and supplies the current to at least the large light emitting element if the tone is larger than the threshold value.
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