Active matrix-based electronic apparatus including a light emitting device that may be non-foward biased to sense light, and method of driving the same

A pixel circuit of an electronic apparatus, the pixel circuit comprising:

• a light-emitting driver configured to apply a forward bias to a light-emitting device in an emission mode to control light to be emitted through the light-emitting device;
• a sensing driver configured to apply a non-forward bias to the light-emitting device in a sensing mode to control an electrical signal corresponding to light incident on the light-emitting device to be generated;
• and
• a reader configured to read intensity of light corresponding to the generated electrical signal,
• wherein the light-emitting driver comprises a first transistor provided between a data line and a ground voltage line;
• and a second transistor connected to a source terminal of the first transistor through a gate terminal and provided between a cathode of the light-emitting device, which is connected to a power source voltage line through an anode, and the ground voltage line,
• wherein the sensing driver comprises a third transistor provided between the cathode of the light-emitting device and the ground voltage line.

A method of driving a pixel circuit of an electronic apparatus, the method comprising:

• applying, by a light-emitting driver, a forward bias to a light-emitting device in an emission mode to control light to be emitted through the light-emitting device;
• applying, by a sensing driver, a non-forward bias to the light-emitting device in a sensing mode to control an electrical signal corresponding to light incident on the light-emitting device to be generated;
• and
• reading, by a reader, intensity of light corresponding to the generated electrical signal,
• wherein the reader comprises a source follower transistor, a fifth transistor, connected to a cathode of the light-emitting device through a gate terminal, and a sixth transistor provided between the fifth transistor and a read line.