# US 2019/0170806 A1 · Display device capable of performing self-diagnosis in relation to partial discharge

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- Number: US 2019/0170806 A1
- Document ID: US20190170806A1
- Status: Published application
- Kind: A1
- Application number: 16/130,318
- Filed: 2018-09-13
- Published: 2019-06-06
- Earliest claimed: 2017-12-01
- Assignees: Lsis Co., Ltd.
- Applicants: Lsis Co., Ltd.
- Inventors: Byung-Chul KIM
- Web page: https://patentgrep.com/patent/US20190170806A1

## CPC

- G06F 11/0703: {Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation}
- G01R 31/12: Testing dielectric strength or breakdown voltage {; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing (G01R31/08, G01R31/327 and G01R31/72 take precedence; measuring in plasmas G01R19/0061; measuring dielectric constants G01R27/2617; ESD, EMC or EMP testing of circuits G01R31/002)}
- G01R 31/2635: {Testing light-emitting diodes, laser diodes or photodiodes}
- G01R 31/44: Testing lamps
- G02F 1/1309: {Repairing; Testing}
- G06F 3/1415: {with means for detecting differences between the image stored in the host and the images displayed on the displays}
- G06F 11/0751: {Error or fault detection not based on redundancy (power supply failures G06F1/30; network fault management H04L41/06)}
- G06F 11/0766: {Error or fault reporting or storing}
- G06F 11/079: {Root cause analysis, i.e. error or fault diagnosis (in a hardware test environment G06F11/22; in a software test environment G06F11/36)}
- G09G 3/006: {Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309)}
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

A display device may include an image processor which is configured to process an image signal and includes a detector configured to determine a group of parameters by detecting a waveform of a detected partial discharge and measuring each of parameters of the waveform in the form of a binary number and a controller configured to identify the partial discharge by comparing the determined group with previously stored groups; and a display unit configured to display the image signal.

## Claims

### Claim 1

A display device capable of performing a self-diagnosis in relation to a partial discharge, the display device comprising:
an image processor configured to process an image signal; and
a display unit configured to display the processed image signal,
wherein the image processor comprises:
a detector configured to determine a group of parameters by detecting a waveform of a detected partial discharge and measuring each of parameters of the waveform in the form of a binary number; and
a controller configured to identify the detected partial discharge by comparing the determined group with previously stored groups.

### Claim 2 (depends on 1)

The display device of claim 1, wherein the controller comprises an arithmetic unit configured to update the previously stored groups by performing an operation on at least one among the previously stored groups.

### Claim 3 (depends on 2)

The display device of claim 2, wherein the arithmetic unit is further configured to perform at least one of:
a selection operation of selecting at least one first group from among the previously stored groups;
a crossover operation of generating a second group by combining parameters of at least two groups among the previously stored groups;
a mutation operation of generating a third group by changing at least one of parameters of the first or second group; and
a substitution operation of replacing one of the previously stored groups with the first group, the second group, or the third group.

### Claim 4 (depends on 1)

The display device of claim 1, wherein the parameters comprise at least one of:
a phase of the partial discharge;
a magnitude of the partial discharge;
a frequency of occurrence of the partial discharge;
a maximum magnitude of the partial discharge;
an average discharge amount;
a firing voltage; and
an extinction voltage.

### Claim 5 (depends on 1)

The display device of claim 1, wherein the image processor further comprises a memory in which identification information of the partial discharge is mapped to each of the previously stored groups.

### Claim 6 (depends on 5)

The display device of claim 5, wherein the identification information comprises at least one of:
a cause of the partial discharge;
a location at which the partial discharge occurs; and
a degree of risk of the partial discharge.

### Claim 7 (depends on 5)

The display device of claim 5, wherein the controller is further configured to diagnose a state of the display device on the basis of the identification information of the detected partial discharge.

### Claim 8 (depends on 7)

The display device of claim 7, wherein the controller outputs an alarm message or powers off the display device on the basis of the identification information of the detected partial discharge.

### Claim 9 (depends on 1)

The display device of claim 1, wherein the detector comprises:
a first impedance element configured to decrease an output impedance when the partial discharge occurs;
a first condenser in which a dielectric breakdown occurs when the output impedance of the first impedance element decreases;
a second condenser of which an output voltage increases when the dielectric breakdown occurs in the first condenser;
a second impedance element to which the increased output voltage of the second condenser is applied; and
a sensing element configured to sense the occurring partial discharge on the basis of a voltage input from the second impedance element.

### Claim 10 (depends on 1)

The display device of claim 1, wherein the image processor further comprises a converter configured to output the image signal in the form of digital data to the display unit, and
the detector detects a partial discharge occurring in the converter.