# US 2014/0191118 A1 · Apparatus and System for Measuring Flicker of Display Panel

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- Number: US 2014/0191118 A1
- Document ID: US20140191118A1
- Status: Published application
- Kind: A1
- Application number: 13/811,284
- Filed: 2013-01-14
- Published: 2014-07-10
- Earliest claimed: 2013-01-09
- Assignees: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Applicants: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Inventors: Ye Dai; Chih-tsung KANG
- Web page: https://patentgrep.com/patent/US20140191118A1

## CPC

- G02F 1/1309: {Repairing; Testing}
- 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)}
- G09G 2320/0247: Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
- 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

An apparatus and a system for measuring flicker of a display panel are disclosed. The apparatus comprises a light guide tube, a measuring probe for flicker measurement, and an optical device for diverging fight. The light guide tube comprises an opening at a first end and an opening at a second end. The trumpet-shaped light guide tube gradually enlarges from the opening at the second end to the opening at the first end. The opening at the first end is used fir receiving light emitting from the periphery regions and the center region of the display. Light entering into the light guide tube through the opening at the first end emerges from the opening at the second end and is transmitted to the measuring probe through the optical device having a diverging effect. The more overall flicker information is acquired to improve the accuracy of measurement.

## Claims

### Claim 1

An apparatus for measuring flicker of a display panel, comprising a light guide tube, a measuring probe for flicker measurement, and an optical device for diverging light;
the light guide tube comprising an opening at a first end and an opening at a second end, the trumpet-shaped light guide tube gradually enlarging from the opening at the second end to the opening at the first end, and a diameter of the opening at the first end of the light guide tube is greater than or equal to a width of the display panel;
an inner wall of the light guide tube being made of a material having high reflectivity, and the inner wall being an opaque reflective surface;
wherein the light guide tube is used for receiving light emitting from periphery regions and a center region of the display panel through the opening at the first end, the received light emerges from the opening at the second end and is transmitted to the measuring probe through the optical device, the optical device is on a light transmitting path between the opening at the first end and the measuring probe, and the measuring probe obtains flicker information of the periphery regions and the center region of the display panel based on the received light and acquires the flicker of the display panel based on the flicker information.

### Claim 2 (depends on 1)

The apparatus as claimed in claim 1, wherein the optical device is a biconcave lens located at the opening at the second end of the light guide tube, the opening at the first end of the light guide tube receives the light emitting from the periphery regions and the center region of the display panel, and the received light emerges to the optical device through the opening at the second end and is transmitted to the measuring probe through the optical device.

### Claim 3 (depends on 1)

The apparatus as claimed in claim 1, wherein a diameter of the measuring probe is the same as a diameter of the opening at the second end and a diameter of the optical device.

### Claim 4

An apparatus for measuring flicker of a display panel, comprising a light guide tube, a measuring probe for flicker measurement, and an optical device for diverging light;
the light guide tube comprising an opening at a first end and an opening at a second end, the trumpet-shaped light guide tube gradually enlarging from the opening at the second end to the opening at the first end:
wherein the light guide tube is used for receiving light emitting from periphery regions and a center region of the display panel through the opening at the first end, the received light emerges from the opening at the second end and is transmitted to the measuring probe through the optical device, the optical device is an a light transmitting path between the opening at the first end and the measuring probe, and the measuring probe obtains flicker information of the periphery regions and the center region of the display panel based on the received light and acquires the flicker of the display panel based on the flicker information.

### Claim 5 (depends on 4)

The apparatus as claimed in claim 4, wherein a diameter of the opening at the first end of the light guide tube is greater than or equal to a width of the display panel.

### Claim 6 (depends on 4)

The apparatus as claimed in claim 4, wherein an inner wall of the light guide is made of a material having high reflectivity, and the inner wall is an opaque reflective surface.

### Claim 7 (depends on 4)

The apparatus as claimed in claim 4, wherein the optical device is a biconcave lens located at the opening at the second end of the light guide tube, the opening at the first end of the light guide tube receives the light emitting from the periphery regions and the center region of the display panel, and the received light emerges to the optical device through the opening at the second end and is transmitted to the measuring probe through the optical device.

### Claim 8 (depends on 7)

The apparatus as claimed n claim 7, wherein a diameter of the measuring probe is the same as a diameter of the opening at the second end and a diameter of the optical device.

### Claim 9

A system for measuring flicker, comprising a display panel and an apparatus for measuring flicker, the apparatus comprising a light guide tube, a measuring probe for flicker measurement, and an optical device for diverging light;
the light guide tube comprising an opening at a first end and an opening at a second end, the trumpet-shaped light guide tube gradually enlarging from the opening at the second end to the opening at the first end;
wherein the light guide tube is used for receiving light emitting from periphery regions and a center region of the display panel through the opening at the first end, the received light emerges from the opening at the second end and is transmitted to the measuring probe through the optical device, the optical device is on a light transmitting path between the opening at the first end and the measuring probe, and the measuring probe obtains flicker information of the periphery regions and the center region of the display panel based on the received light and acquires the flicker of the display panel based on the flicker information.

### Claim 10 (depends on 9)

The system as claimed in claim 9, wherein a diameter of the opening at the first end of the light guide tube is greater than or equal to a width of the display panel.

### Claim 11 (depends on 9)

The system as claimed in claim 9, wherein an inner wall of the light guide tube is made of a material having high reflectivity, and the inner wall is an opaque reflective surface.

### Claim 12 (depends on 9)

The system as claimed in claim 9, wherein the optical device is a biconcave lens located at the opening at the second end of the light guide tube, the opening at the first end of the light guide tube receives the light emitting from the periphery regions and the center region of the display panel, and the received light emerges to the optical device through the opening, at the second end and is transmitted to the measuring probe through the optical device.

### Claim 13 (depends on 12)

The system as claimed in claim 12, wherein a width of the display panel is d, a distance from the display panel to the optical device is D, a focal length of the optical device is f, a diameter of the measuring probe is d, and a relationship between L, D, f, and d is
2

f
d
=
2

(
f
+
D
)
L
.