Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2007-04-24
2007-04-24
Epps, Georgia (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S208200, C349S043000
Reexamination Certificate
active
11021886
ABSTRACT:
A light sensing panel includes a scan line transmitting a scan signal, a power source line transmitting a bias voltage, a readout line transmitting a light sensing signal and a light sensing device. The light sensing device includes a control electrode that is electrically connected to the scan line to receive the scan signal, a first current electrode that is electrically connected to the power source line to receive the bias voltage, and a second current electrode that is electrically connected to the readout line to apply a light sensing signal to the readout line when the light sensing signal senses an external light. The light sensing panel requires only one thin film transistor in order to detect a position wherein the external light is incident. Therefore, electrical coupling between devices is reduced and aperture ratio is increased, thereby enhancing a display quality.
REFERENCES:
patent: 2005/0116937 (2005-06-01), Choi et al.
Cho Jong-Whan
Choi Young-Jun
Jung Young-Bae
Park Sang-Jin
Uh Kee-Han
Epps Georgia
Samsung Electronics Co,. Ltd.
Williams Don
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