Display device
A TFT element for ambient light detection and a TFT element for temperature detection are connected in series. In a first period, a first switch element is off, and a second switch element is at a hi side, so that a threshold voltage of the TFT element for temperature detection is detected. In a second period, a first switch element is on, and a second switch element is at a low side, so that temperature is detected. In a third period, a first switch element is on, and a second switch element is at a hi side, so that ambient light is detected. An input voltage and a control voltage to each of the TFT elements are set by a voltage controller provided in a drive circuit based on the threshold voltage.
1. A display device, comprising:
a display panel on which a plurality of pixels are arranged in a matrix pattern,
a current-voltage converter and a temperature detector disposed in the periphery of the display panel, and
a drive circuit configured to supply a first control signal to the current-voltage converter and a second control signal to the temperature detector, respectively, and drive signals to drive the pixels,
wherein a voltage controller is provided in the drive circuit, and
the voltage controller is configured to detect a threshold voltage of the temperature detector, and to set a first input voltage and a first control voltage to the current-voltage converter and to set a second input voltage and a second control voltage to the temperature detector, respectively, based on the threshold voltage,
wherein the voltage controller detects the threshold voltage of the temperature detector while making the current-voltage converter to be open.
2. The display device according to claim 1 :
wherein a shade for shading ambient light is provided in the temperature detector.
3. The display device according to claim 1 :
wherein a TFT element of the current-voltage converter and a TFT element of the temperature detector are connected in series.
4. The display device according to claim 1 :
wherein a digital conversion circuit that performs digital conversion of output of each of the current-voltage converter and the temperature detector is provided in the drive circuit.
5. The display device according to claim 4 :
wherein the digital conversion circuit includes:
a current-digital conversion circuit that performs digital conversion of an output current from the temperature detector, and
a voltage-digital conversion circuit that performs digital conversion of an output voltage from the temperature detector.