Detecting circuit for pixel electrode voltage of flat panel display device
First Claim
1. A detecting circuit for pixel electrode voltage of a flat panel display device, wherein the flat panel display device has a plurality of scanning lines and a plurality of data lines crossing with the plurality of scanning lines, the plurality of scanning lines and the plurality of data lines define a plurality of pixel units, and each of the pixel units comprises a pixel switching element and a pixel electrode, the detecting circuit for pixel electrode voltage comprising:
- at least one detecting sub-circuit for pixel electrode voltage, each of which comprising;
a signal amplifying unit connected with the pixel electrode in the pixel unit, for amplifying a voltage signal of the pixel electrode; and
a signal detecting unit connected with the signal amplifying unit, for detecting the amplified voltage signal of the pixel electrode from the signal amplifying unit, and outputting a variation in the voltage signal of the pixel electrode with time, whereinthe detecting circuit for pixel electrode voltage includes two detecting sub-circuits for pixel electrode voltage, and the pixel electrodes in first and last pixel units of a first row of pixel units of the flat panel display device are connected to the signal amplifying units of the two detecting sub-circuits for pixel electrode voltage respectively.
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Abstract
A detecting circuit for pixel electrode voltage of a flat panel display device, the flat panel display device having a plurality of scanning lines and a plurality of data lines crossing with the plurality of scanning lines, the plurality of scanning lines and data lines define a plurality of pixel units, and each of the pixel units including a pixel switching element and a pixel electrode. The detecting circuit for pixel electrode voltage includes at least one detecting sub-circuit for pixel electrode voltage. The detecting sub-circuit for pixel electrode voltage includes: a signal amplifying unit connected with the pixel electrode in the pixel unit, for amplifying a voltage signal of the pixel electrode; and a signal detecting unit connected with the signal amplifying unit, for detecting the voltage signal of the pixel electrode that has been amplified by the signal amplifying unit, and outputting a variation in the voltage signal of the pixel electrode with time. Compared with the prior art, the present invention has advantages of simple detecting circuit structure and accurate detection result.
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Citations
14 Claims
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1. A detecting circuit for pixel electrode voltage of a flat panel display device, wherein the flat panel display device has a plurality of scanning lines and a plurality of data lines crossing with the plurality of scanning lines, the plurality of scanning lines and the plurality of data lines define a plurality of pixel units, and each of the pixel units comprises a pixel switching element and a pixel electrode, the detecting circuit for pixel electrode voltage comprising:
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at least one detecting sub-circuit for pixel electrode voltage, each of which comprising; a signal amplifying unit connected with the pixel electrode in the pixel unit, for amplifying a voltage signal of the pixel electrode; and a signal detecting unit connected with the signal amplifying unit, for detecting the amplified voltage signal of the pixel electrode from the signal amplifying unit, and outputting a variation in the voltage signal of the pixel electrode with time, wherein the detecting circuit for pixel electrode voltage includes two detecting sub-circuits for pixel electrode voltage, and the pixel electrodes in first and last pixel units of a first row of pixel units of the flat panel display device are connected to the signal amplifying units of the two detecting sub-circuits for pixel electrode voltage respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification