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US 8,008,611 B2Granted
Photo sensor and flat panel display using the same
AssigneeSamsung Mobile Display Co., Ltd.
InventorsDo-Youb Kim, Keum-Nam Kim
Life of this patent
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Abstract
A photo sensor capable of improved output used in a flat panel display (FPD). The photo sensor includes a first transistor coupled to a first power source, a first node, and a second node. A photo diode is also provided, as well as a second transistor, a third transistor, a fourth transistor, a fifth transistor, and a first capacitor.
Claims16
A photo sensor, comprising:
- a first transistor whose first electrode is coupled to a first power source, whose second electrode is coupled to a first node, and whose gate electrode is coupled to a second node;
- a photo diode whose first electrode is coupled to the first power source and whose second electrode is coupled to the second node;
- a second transistor whose first electrode is coupled to a cathode electrode of the photo diode, whose second electrode is coupled to the second node, and whose gate electrode is coupled to a first control line;
- a third transistor whose first electrode is coupled to the second node, whose second electrode is coupled to the first node, and whose gate electrode is coupled to a reset signal line;
- a fourth transistor whose first electrode is coupled to the first node, whose second electrode is coupled to a first output end, and whose gate electrode is coupled to the reset signal line;
- a fifth transistor whose first electrode is coupled to the first node, whose second electrode is coupled to a second output end, and whose gate electrode is coupled to a second control line;
- and
- a first capacitor whose first electrode is coupled to the first power source and whose second electrode is coupled to the second node.
5 more elements
A flat panel display (FPD), comprising:
- a pixel unit displaying an image corresponding to data signals and scan signals;
- a data driver receiving video signals and generating the data signals to transmit the data signals to the pixel unit;
- a scan driver generating the scan signals to transmit the scan signals to the pixel unit;
- and
- a photo sensor sensing brightness of peripheral light to control brightness of the image to correspond to the brightness of the peripheral light,
- the photo sensor comprising
- a first transistor whose first electrode is coupled to a first power source, whose second electrode is coupled to a first node, and whose gate electrode is coupled to a second node;
- a photo diode whose first electrode is coupled to the first power source and whose second electrode is coupled to the second node;
- a second transistor whose first electrode is coupled to a cathode electrode of the photo diode, whose second electrode is coupled to the second node, and whose gate electrode is coupled to a first control line;
- a third transistor whose first electrode is coupled to the second node, whose second electrode is coupled to the first node, and whose gate electrode is coupled to a reset signal line;
- a fourth transistor whose first electrode is coupled to the first node, whose second electrode is coupled to a first output end, and whose gate electrode is coupled to the reset signal line;
- a fifth transistor whose first electrode is coupled to the first node, whose second electrode is coupled to a second output end, and whose gate electrode is coupled to a second control line;
- and
- a first capacitor whose first electrode is coupled to the first power source and whose second electrode is coupled to the second node.
11 more elements
Dependencies are inferred from the claim text.