DISPLAY DEVICE AND METHOD OF TESTING SENSING UNIT THEREOF
First Claim
1. A display device comprising:
- a plurality of first display signal lines;
a plurality second display signal lines crossing the first display signal lines;
a plurality of pixels each respectively connected to one of the first display signal lines and one of the second display signal lines;
a plurality of first sensing signal lines, each respectively formed substantially parallel to a subset of the first display signal lines, each subset of first display signal lines forming a first display signal group;
a plurality of second sensing signal lines, each respectively formed substantially parallel to a subset of the second display signal lines, each subset of second display signal lines forming a second display signal group;
a plurality of first sensing units connected to the first sensing signal lines;
a plurality of second sensing units connected to the second sensing signal lines;
a plurality of first test circuits, each respectively connected to one of the first sensing signal lines and a corresponding one of the first display signal groups, the first test circuits supplied with first and second test signals, the first test circuits testing a state of the first sensing units by changing luminance of the pixels according to the state of the first sensing units; and
a plurality of second test circuits, each respectively connected to one of the second sensing signal lines and a corresponding one of the second display signal groups, the second test circuits supplied with third and fourth test signals, the second test circuits testing a state of the second sensing units by determining whether or not the pixels will operate according to the state of the second sensing units.
2 Assignments
0 Petitions
Accused Products
Abstract
A display device includes first and second display signal lines, pixels, first and second sensing signal lines, first through fourth test lines for transmitting first through fourth test signals, a first switching element connected to the first and second test lines, and the first sensing signal line, second switching elements connected to the first switching element, the second test line, and a subset of first display signal lines, a third switching element connected to the third and fourth test lines, and the second sensing signal line, and fourth switching elements connected to the third switching element, the fourth test line, and a subset of second display signal lines.
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Citations
20 Claims
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1. A display device comprising:
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a plurality of first display signal lines; a plurality second display signal lines crossing the first display signal lines; a plurality of pixels each respectively connected to one of the first display signal lines and one of the second display signal lines; a plurality of first sensing signal lines, each respectively formed substantially parallel to a subset of the first display signal lines, each subset of first display signal lines forming a first display signal group; a plurality of second sensing signal lines, each respectively formed substantially parallel to a subset of the second display signal lines, each subset of second display signal lines forming a second display signal group; a plurality of first sensing units connected to the first sensing signal lines; a plurality of second sensing units connected to the second sensing signal lines; a plurality of first test circuits, each respectively connected to one of the first sensing signal lines and a corresponding one of the first display signal groups, the first test circuits supplied with first and second test signals, the first test circuits testing a state of the first sensing units by changing luminance of the pixels according to the state of the first sensing units; and a plurality of second test circuits, each respectively connected to one of the second sensing signal lines and a corresponding one of the second display signal groups, the second test circuits supplied with third and fourth test signals, the second test circuits testing a state of the second sensing units by determining whether or not the pixels will operate according to the state of the second sensing units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A display device comprising:
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a plurality of first display signal lines; a plurality of second display signal lines crossing the first display signal lines; a plurality of pixels each respectively connected to one of the first display signal lines and one of the second display signal lines; a plurality of first sensing signal lines, each respectively formed substantially parallel to a subset of the first display signal lines; a plurality of second sensing signal lines, each respectively formed substantially parallel to a subset of the second display signal lines; a first test line spaced apart from a pixel, and transmitting a first test signal; a second test line spaced apart from the first test line, and transmitting a second test signal; a first switching element connected to the first test line, the second test line, and one of the first sensing signal lines; a plurality of second switching elements connected to one subset of the first display signal lines adjacent to the first switching element, the second test line, and the first sensing signal line connected to the first switching element; a third test line spaced apart from the pixel, and transmitting a third test signal; a fourth test line spaced apart from the third test line, and transmitting a fourth test signal; a third switching element connected to the third test line, the fourth test line, and one of the second sensing signal lines; and a plurality of fourth switching elements connected to one subset of the second display signal lines adjacent to the third switching element, the fourth test line, and the second sensing signal line connected to the third switching element. - View Dependent Claims (10, 11, 12, 13)
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14. A method of testing a sensing unit of a display device, the display device including:
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a plurality of first display signal lines; a plurality second display signal lines; a plurality of pixels each respectively connected to one of the first display signal lines and one of the second display signal lines; at least one first sensing signal line, each first sensing signal line respectively formed substantially parallel to a subset of the first display signal lines; at least one second sensing signal line, each second sensing signal line respectively formed substantially parallel to a subset of the second display signal lines; a first test line; a second test line; a first switching element of which an input terminal is connected to the first test line, a control terminal is connected to the second test line, and an output terminal is connected to one of the at least one first sensing signal lines; a plurality of second switching elements of which input terminals are connected to the first switching element, control terminals are connected to the second test line, and output terminals are respectively connected to one subset of first display signal lines adjacent to the first sensing signal line connected to the first switching element; a third test line; a fourth test line; a third switching element of which an input terminal is connected to the third test line, a control terminal is connected to the fourth test line, and an output terminal is connected to one of the at least one second sensing signal lines; and
,a plurality of fourth switching elements of which input terminals are connected to the third switching element, control terminals are connected to the fourth test line, and output terminals are respectively connected to one subset of second display signal lines adjacent to the second sensing signal line connected to the third switching element, the method comprising; supplying a first test signal when first to second switching elements are turned on by supplying the first test signal having a first magnitude to the first test line and supplying a second test signal having a second magnitude to the second test line; changing a state of the second test signal to a third magnitude that is less than the second magnitude; supplying a fourth test signal to a corresponding pixel when the third to fourth switching elements are turned on by supplying a third test signal having a fourth magnitude to the third test line and supplying the fourth test signal having the second magnitude to the fourth test line; and changing a state of the fourth test signal from the second magnitude to the third magnitude. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification