Electro-optical device and electronic apparatus

Abstract

An electro-optical device includes a substrate having a plurality of scanning lines, a plurality of data lines, and a plurality of pixels each including a pixel electrode and a switching element, the pixels disposed at positions corresponding to intersecting portions of the scanning lines and the data lines; a photoelectric transducer that converts light into electrical signals disposed on the substrate; and a reflecting layer that reflects incident light toward the photoelectric transducer and light-shielding layers that oppose the switching elements, the layers being disposed on the substrate. The reflecting layer is composed of the same film as the light-shielding layers.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described with reference to the accompanying drawings, wherein like numbers refer to like elements.

FIG. 1 is a block diagram illustrating the structure of an electro-optical device according to a first embodiment of the invention.

FIG. 2 is a circuit diagram illustrating the configurations of a photoelectric-conversion circuit and a determination circuit in the electro-optical device.

FIG. 3 is a partial cross-sectional view of a liquid-crystal panel in the electro-optical device.

FIG. 4 is a partial cross-sectional view of a first PIN diode in the electro-optical device.

FIG. 5 illustrates the photoelectric conversion efficiency of the photoelectric-conversion circuit in the electro-optical device.

FIG. 6 is a block diagram illustrating the structure of an electro-optical device according to a second embodiment of the invention.

FIG. 7 is a circuit diagram illustrating the configurations of a photoelectric-conversion circuit and a determination circuit in an electro-optical device according to a third embodiment of the invention.

FIG. 8 illustrates the output from the photoelectric-conversion circuit in the electro-optical device.

FIG. 9 is a perspective view illustrating the structure of a cellular phone to which the electro-optical device is applied.

Claims

1. An electro-optical device comprising: a substrate including a plurality of scanning lines, a plurality of data lines, and a plurality of pixels each including a pixel electrode and a switching element, the pixels disposed at positions corresponding to intersecting portions of the scanning lines and the data lines;a photoelectric transducer that converts light into electrical signals disposed on the substrate; anda reflecting layer that reflects incident light toward the photoelectric transducer and light-shielding layers that oppose the switching elements, the layers being disposed on the substrate, whereinthe reflecting layer is composed of the same film as the light-shielding layers.

2. The electro-optical device according to claim 1, wherein the reflecting layer is composed of metal having low light absorptance.

3. The electro-optical device according to claim 1, wherein the photoelectric transducer is disposed in an area on the substrate, the pixel electrodes being disposed in the area.

4. The electro-optical device according to claim 1, wherein the photoelectric transducer is disposed in an area on the substrate other than the area in which the pixel electrodes are disposed.

5. The electro-optical device according to claim 1, further comprising: a light source that supplies light to the pixels;a determination circuit that determines that light is detected when the level of the electrical signals output from the photoelectric transducer exceeds a predetermined threshold value; anda control circuit that controls the amount of light supplied from the light source to the pixels on the basis of the determination by the determination circuit.

6. An electronic apparatus comprising the electro-optical device according to claim 1.

7. A method for manufacturing an electro-optical device including a substrate having a plurality of scanning lines, a plurality of data lines, and a plurality of pixels each including a pixel electrode and a switching element, the pixels being disposed at positions corresponding to intersecting portions of the scanning lines and the data lines, comprising: forming of a reflecting layer that reflects incident light toward a photoelectric transducer and light-shielding layers that oppose the switching elements on the substrate, the layers being composed of the same film; andforming of the photoelectric transducer that converts light into electrical signals on the reflecting layer.