Inspection device of display device, method of inspecting mother substrate for display device, and display device
According to one embodiment, an inspection device of a display device, includes a first probe block which includes first probes, a probe block attachment which supports the first probe block to enable a position of the first probe block to be set variably, a signal source which supplies a signal to the first probes, and a transmission cable which connects the first probe block with the signal source.
1. A display device including a display area and a peripheral area,
the peripheral area including
terminals on which a signal supply source is mounted, and which are supplied with signals for displaying image to the display area; and
inspection pads supplied with inspection signals for inspecting a defect or illumination of the display area, wherein
the inspection pads include a first inspection pad group composed of first inspection pads and a second inspection pad group composed of second inspection pads,
the first inspection pad group and the second inspection pad group are spaced apart from each other,
the terminals are disposed between the first inspection pad group and the second inspection pad group,
the second inspection pads are arranged at same pitches as the first inspection pads,
the first inspection pads of the first inspection pad group are located on a first straight line along a side of the display device,
a distance from each of the first inspection pads to the side of the display device is a first distance,
the second inspection pads of the second inspection pad group are located on a straight line extending from the first straight line to allow a first probe block and a second probe block to move along a line parallel to the first straight line, the first probe block configured to bring a first inspection probe into contact with each of the first inspection pads, the second probe block configured to bring a second inspection probe into contact with each of the second inspection pads, and
a distance from each of the second inspection pads to the side of the display device is the first distance.
2. The display device of claim 1 , wherein
the number of the first inspection pads in the first inspection pad group is equal to the number of the second inspection pads in the second inspection pad group.
3. The display device of claim 1 , wherein
the first inspection pad group and the second inspection pad group are spaced apart from a signal supply source.
4. The display device of Claim 1 , wherein
signals supplied to a common electrode formed in the display area are capable of being supplied commonly to some of the first inspection pads and some of the second inspection pads.
5. The display device of claim 1 further comprising:
a first substrate including the terminals and the inspection pads, and
a second substrate opposed to the first substrate, wherein
the display area is located in an area where the first substrate and the second substrate overlap,
a first side of the second substrate is located between the display area and a first side of the first substrate,
the terminals and the inspection pads are located between the first side of the first substrate and the first side of the second substrate, and
the inspection pads overlap neither of an IC chip and a flexible printed circuit.
6. The display device of claim 5 , wherein
a total number of the first inspection pads arranged in a first row located on a side close to the first side of the first substrate, is different from a total number of the first inspection pads arranged in a second row located on a side close to the first side of the second substrate.
7. The display device of claim 6 , wherein
a total number of the first inspection pads arranged in the first row, is same as a total number of second inspection pads arranged in the first row, and
a total number of the first inspection pads arranged in the second row, is same as a total number of second inspection pads arranged in the second row.