US 11,900,844 B1Granted

Display panel and display device for abnormal detection

AssigneeAUO Corporation

InventorsFang-Yuan Lin, Chen-Chi Lin, Yu-Chieh Kuo, Cheng-Wei Lai

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Abstract

A display panel includes a data line and a pixel circuit under test. Pixel circuit under test is coupled to data line, and is configured to receive a first detecting signal from a detecting signal source and receive a second detecting signal from a pixel data signal source. Pixel circuit under test is configured to generate a driving current to read the first detecting signal and the second detecting signal so as to generate a detection result signal. Pixel circuit under test includes a luminous element and a bypass circuit. Luminous element is configured to emit a light according to the driving current. Bypass circuit is coupled to luminous element and data line, and is configured to transmit the detection result signal to detecting signal source through data line according to a test control signal so that detecting signal source determines whether pixel circuit under test is abnormal.

Claims19

Dependent claims

A display panel, comprising:

a data line;
and
a pixel circuit under test, coupled to the data line, and configured to receive a first detecting signal from a detecting signal source and receive a second detecting signal from a pixel data signal source, wherein the pixel circuit under test is configured to generate a driving current to read the first detecting signal and the second detecting signal so as to generate a detection result signal, wherein the pixel circuit under test comprises:
a luminous element, configured to emit a light according to the driving current;
a bypass circuit, coupled to the luminous element and the data line, and configured to transmit the detection result signal to the detecting signal source through the data line according to a test control signal so that the detecting signal source determines whether the pixel circuit under test is abnormal;
and
a pulse-width modulation circuit, coupled to the detecting signal source and a first control signal source, and configured to drive according to a first control signal of the first control signal source.

4 more elements

A display device, comprising:

a display panel, comprising:
a plurality of data lines;
a plurality of gate lines;
and
a plurality of pixel circuits under test, coupled to the plurality of data lines and the plurality of gate lines respectively;
and
a detecting signal source, coupled to each of the plurality of pixel circuits under test and the plurality of data lines of the display panel, and configured to generate a first detecting signal to each of the plurality of pixel circuits under test so that each of the plurality of pixel circuits under test generates a detection result signal to the plurality of data lines according to the first detecting signal and a second detecting signal, wherein the detecting signal source is configured to determine whether each of the plurality of pixel circuits under test is abnormal according to the detection result signal, wherein if each of the plurality of pixel circuits under test is abnormal, the detecting signal source is configured to lock the at least one of the plurality of pixel circuits under test which is abnormal according to a plurality of positioning points of the plurality of data lines and the plurality of gate lines.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/147,730Filed 29 Dec 2022
Priority: TW 1111472668 Dec 2022
Granted: 13 Feb 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G09G 3/006
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes: electronic inspection or…
G09G 3/2011
Display of intermediate tones: by amplitude modulation
G09G 3/2014
Display of intermediate tones: by modulation of the duration of a single pulse during which the logic level remains constant
G09G 3/3233
Using an active matrix: with pixel circuitry controlling the current through the light-emitting element