Apparatus and method of testing an organic light emitting diode array
First Claim
1. A method of testing an organic light emitting diode array, which has a plurality of pixel units and each of the pixel units comprises a commonly shared power supply line and a commonly shared common line, the method comprising the steps of:
- providing a current meter and a voltage source connected in series between the common line and power supply line;
sequentially writing a first logic value to the pixel units and taking first current readings corresponding to the written pixel units by virtue of the current meter;
determining whether the pixel units are defective according to the first current readings corresponding to the written pixel units.
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Abstract
An apparatus and method of testing an organic light emitting diode array are disclosed. A current meter and voltage source are serially connected between a common line and power supply line shared by any pixel unit. Specific logic values are sequentially written to the pixel units via signal lines and the current readings corresponding the pixel units are taken by the current meter. Whether the pixel units are defective can be determined according to the current readings. The defective type of a pixel units can be determined according to the current reading corresponding to the defective pixel unit and the current readings corresponding the other perfect pixel units.
149 Citations
18 Claims
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1. A method of testing an organic light emitting diode array, which has a plurality of pixel units and each of the pixel units comprises a commonly shared power supply line and a commonly shared common line, the method comprising the steps of:
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providing a current meter and a voltage source connected in series between the common line and power supply line;
sequentially writing a first logic value to the pixel units and taking first current readings corresponding to the written pixel units by virtue of the current meter;
determining whether the pixel units are defective according to the first current readings corresponding to the written pixel units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus of testing an organic light emitting diode array, which has a plurality of pixel units and each of the pixel units comprises a commonly shared power supply line and a commonly shared common line, the apparatus comprising:
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a voltage source for providing a bias voltage to the power supply line and common line;
a writing circuit for sequentially writing a first logic value to the pixel units; and
a current meter serially connected with the voltage source for reading the currents passing between the power supply line and common line and generating first current readings corresponding to the pixel units;
wherein whether the pixel units are defective are determined according to the first current readings corresponding to the pixel units. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification