Display device and a method for testing the same
AssigneeSamsung Electronics Co., Ltd.
InventorsMyung-Woo Lee, Joo-Hyung Lee, Sang-Jin Pak, Kee-Han Uh
Life of this patent
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Abstract
A method of economically manufacturing display devices having a matrix of drivable pixels arranged in rows and columns arranged to be driven by IC drivers, including the steps of including a plurality of sensor signal lines in the display device that are selectively connectable to certain of the pixel rows, a plurality of sensor signal lines selectively connectable to certain of the pixel columns, transmitting test signals to test predetermined ones of the rows and columns of pixels, and connecting pixel driving circuits to those display devices exhibiting uniform pixel brightness in response to the test signals.
Claims20
A display device comprising:
- a plurality of first display signal lines disposed in a display area for displaying an image;
- a plurality of second display signal lines disposed in the display area and intersecting the first display signal lines;
- a plurality of first sensor signal lines for transmitting a first set of sensor signals generated based on at least a touch, the sensor signal lines being disposed in the display area and extending parallel to the first display signal lines;
- a plurality of second sensor signal lines for transmitting a second set of sensor signals generated based on one or more touches, the second sensor signal lines being disposed in the display area and extending parallel to the second display signal lines;
- a plurality of first sensor signal output units respectively connected to the first sensor signal lines for receiving the first set of sensor signals from the first sensor signal lines;
- a plurality of second sensor signal output units respectively connected to the second sensor signal lines for receiving the second set of sensor signals from the second sensor signal lines;
- a plurality of first inspection switching elements respectively connected to the first sensor signal output units and the first display signal lines;
- a plurality of second inspection switching elements respectively connected to the second sensor signal output units and the second display signal lines;
- a first inspection line for transmitting a first test signal to the first inspection switching elements;
- and
- a second inspection line for transmitting the first test signal to the second inspection switching elements.
A method for testing a display device, which comprises a plurality of first display signal lines, a plurality of second display signal lines, a plurality of first sensor signal lines, a plurality of second sensor signal lines, a plurality of first sensor signal output units connected to the first sensor signal lines, a plurality of second sensor signal output units connected to the second sensor signal lines, a plurality of first inspection switching elements respectively connected to the first sensor signal lines and the first display signal lines, a plurality of second inspection switching elements respectively connected to the second sensor signal lines and the second display signal lines, a first inspection line for transmitting a test signal to the first inspection switching elements, and a second inspection line for transmitting the test signal to the second inspection switching elements, wherein each of the first and second sensor signal output units comprises a reset transistor, an output transistor connected to the reset transistor, the method comprising:
- driving the reset transistor and the output transistor;
- and
- applying a test signal to the first inspection line and to the second inspection line and applying a signal from the output transistor to the first display signal lines and the second display signal lines through the first and second inspection switching elements.
A display device comprising:
- a plurality of first display signal lines;
- a plurality of second display signal lines intersecting the first display signal lines in a plan view of the display device;
- a plurality of first sensor signal lines disposed parallel to the first display signal lines;
- a plurality of second sensor signal lines disposed parallel to the second display signal lines;
- a plurality of first sensor signal output units respectively connected to the first sensor signal lines;
- a plurality of second sensor signal output units respectively connected to the second sensor signal lines;
- a plurality of first inspection switching elements respectively connected to the first sensor signal output units and the first display signal lines;
- and
- a plurality of second inspection switching elements respectively connected to the second sensor signal output units and the second display signal lines,
- wherein the plurality of first sensor signal output units includes a first sensor signal output unit, the first sensor signal output unit comprising:
- a first reset transistor supplied with a first reset voltage and a first reset control signal,
- an output transistor connected to the first reset transistor and an inspection switching element of the plurality of first inspection switching elements, and
- a second reset transistor supplied with a second reset voltage and a second reset control signal and connected to the output transistor.
Dependencies are inferred from the claim text.