Display device and method of driving the same
First Claim
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1. A display device comprising:
- a display panel including an array substrate on which source lines and gate lines are disposed and an opposite substrate on which a common electrode is disposed, the opposite substrate facing the array substrate;
a source driving part configured to output a data signal to respective source lines during a display period of a frame period;
a gate driving part configured to output a gate signal to respective gate lines during the display period;
a readout part configured to read out a detection signal during an elimination period of the frame period, the readout part being electrically connected with at least one of the lines of the array substrate, wherein the elimination period is separate from the display period;
a pulse generating part configured to output a control pulse for operating the readout part during the elimination period; and
a voltage generating part configured to electrically float the entire common electrode during the elimination period,wherein the opposite substrate is adapted to be touched by an objectwherein the readout part comprises;
a first readout part configured to read out first detection signals from the source lines, the first readout part, the first readout part comprising;
a first switching part having a plurality of first transistors electrically connected to respective terminals of the source lines; and
a first current detecting part having a plurality of first op-amps electrically connected to respective one or more of the first transistors of the first switching part, the first current detecting part being configured to output first detection currents flowing through the source lines as the first detection signals; and
a second readout part configured to read out second detection signals from the gate lines, the second readout part comprising;
a second switching part having a plurality of second transistors electrically connected to respective terminals of the gate lines; and
a second current detecting part having a plurality of second op-amps electrically connected to respective one or more of the second transistors of the second switching part, the second current detecting part being configured to output second detection currents flowing through the gate lines as the second detection signals,wherein the pulse generating part is configured to output a first control pulse and a second control pulse at the same time for controlling an operation of the first readout part and an operation of the second readout part, respectively,wherein the first detection signals from the source lines are configured to be read out at the same start time as the second detection signals from the gate lines are read out,wherein gate electrodes of the plurality of first transistors are configured to simultaneously receive the first control pulse, andwherein gate electrodes of the plurality of second transistors are configured to simultaneously receive the second control pulse.
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Abstract
A display device includes a display panel, a source driving part, a gate driving part, a readout part and a pulse generating part. The display panel includes an array substrate on which a source line and a gate line are formed, and an opposite substrate on which a common electrode is formed. The readout part is electrically connected with at least one of the lines of the array substrate and the common electrode of the opposite substrate, and reads out a detection signal during an elimination period of a frame period. The pulse generating part outputs a control pulse for driving the readout part during the elimination period. Accordingly, a detection signal is read out through lines or a common electrode that are/is formed for displaying an image, so that an aperture ratio may be increased, and a manufacturing process thereof may be simplified.
24 Citations
4 Claims
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1. A display device comprising:
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a display panel including an array substrate on which source lines and gate lines are disposed and an opposite substrate on which a common electrode is disposed, the opposite substrate facing the array substrate; a source driving part configured to output a data signal to respective source lines during a display period of a frame period; a gate driving part configured to output a gate signal to respective gate lines during the display period; a readout part configured to read out a detection signal during an elimination period of the frame period, the readout part being electrically connected with at least one of the lines of the array substrate, wherein the elimination period is separate from the display period; a pulse generating part configured to output a control pulse for operating the readout part during the elimination period; and a voltage generating part configured to electrically float the entire common electrode during the elimination period, wherein the opposite substrate is adapted to be touched by an object wherein the readout part comprises; a first readout part configured to read out first detection signals from the source lines, the first readout part, the first readout part comprising; a first switching part having a plurality of first transistors electrically connected to respective terminals of the source lines; and a first current detecting part having a plurality of first op-amps electrically connected to respective one or more of the first transistors of the first switching part, the first current detecting part being configured to output first detection currents flowing through the source lines as the first detection signals; and a second readout part configured to read out second detection signals from the gate lines, the second readout part comprising; a second switching part having a plurality of second transistors electrically connected to respective terminals of the gate lines; and a second current detecting part having a plurality of second op-amps electrically connected to respective one or more of the second transistors of the second switching part, the second current detecting part being configured to output second detection currents flowing through the gate lines as the second detection signals, wherein the pulse generating part is configured to output a first control pulse and a second control pulse at the same time for controlling an operation of the first readout part and an operation of the second readout part, respectively, wherein the first detection signals from the source lines are configured to be read out at the same start time as the second detection signals from the gate lines are read out, wherein gate electrodes of the plurality of first transistors are configured to simultaneously receive the first control pulse, and wherein gate electrodes of the plurality of second transistors are configured to simultaneously receive the second control pulse. - View Dependent Claims (2, 3, 4)
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Specification
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Current AssigneeSamsung Display Company Limited (Samsung Electronics Co. Ltd.)
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Original AssigneeSamsung Electronics Co. Ltd.
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InventorsPark, Sang-Jin, Cho, Man-Seung, Uh, Kee-Han, Lee, Joo-Hyung
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Primary Examiner(s)MARINELLI, PATRICK
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Application NumberUS11/760,815Publication NumberTime in Patent Office2,689 DaysField of Search345156-183, 345/104, 178 1801- 2004, 349/162US Class Current345/173CPC Class CodesG02F 1/13338 Input devices, e.g. touch p...G02F 1/136213 Storage capacitors associat...G02F 1/136286 Wiring, e.g. gate line, dra...G02F 1/1368 in which the switching elem...G06F 3/0412 Digitisers structurally int...G06F 3/04184 Synchronisation with the dr...G06F 3/0443 using a single layer of sen...G06F 3/0445 using two or more layers of...G06F 3/0446 using a grid-like structure...G09G 2310/061 for resetting or blankingG09G 3/3648 using an active matrix G09G...G09G 3/3677 suitable for active matrice...G09G 3/3688 suitable for active matrice...G09G 3/3696 Generation of voltages supp...
