Sharp Display Technology Corporation

Kohhei Tanaka

Adnan Heganovic

Seiichi Uchida

Kaoru Yamamoto

Ryo Yonebayashi

Masahito Sano

A pixel circuit with sensing function that can perform sensing operation and display operation in a simultaneous and parallel manner is implemented using a small number of elements. For each pixel circuit () there are provided a sensor circuit () connected to a control node (NG) and including three or less circuit elements; and a read circuit () connected to a second conductive terminal of a drive transistor (T) and including one read transistor (T). A sensing process is performed during a period during which a drive current is supplied to an organic EL element () depending on a potential at the control node (NG). A sensing result reading process is performed by maintaining the read transistor (T) in on state during a predetermined period after ending the sensing process.

Display device and method for driving same

When a current-driven display device with an internal compensation method operates in a pause driving mode, a non-light emission period according to a light emission duty is provided in both a refresh frame period and a non-refresh frame period, and an on-bias applying period for applying on-bias to a drive transistor in a pixel circuit is provided in both the non-light emission periods. In the non-light emission period in the refresh frame period, an on-bias applying period is provided in a period from when data writing with threshold compensation is performed to when the light emission period starts. Thus, even when the light emission duty is low, the difference in the stress state of the drive transistor between the refresh frame period and the non-refresh frame period is reduced.

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Kameyama, Japan

Kohhei Tanaka