KR20040058688A - Distorted Brightness Compensation System and Distorted Brightness Compensation Method - Google Patents

Distorted Brightness Compensation System and Distorted Brightness Compensation Method Download PDF

Info

Publication number
KR20040058688A
KR20040058688A KR1020020085061A KR20020085061A KR20040058688A KR 20040058688 A KR20040058688 A KR 20040058688A KR 1020020085061 A KR1020020085061 A KR 1020020085061A KR 20020085061 A KR20020085061 A KR 20020085061A KR 20040058688 A KR20040058688 A KR 20040058688A
Authority
KR
South Korea
Prior art keywords
brightness
diffusion filter
filter surface
brightness data
image
Prior art date
Application number
KR1020020085061A
Other languages
Korean (ko)
Other versions
KR100465804B1 (en
Inventor
최호석
김준보
전형조
홍민
김재완
심화섭
안형민
Original Assignee
삼성전자주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성전자주식회사 filed Critical 삼성전자주식회사
Priority to KR10-2002-0085061A priority Critical patent/KR100465804B1/en
Publication of KR20040058688A publication Critical patent/KR20040058688A/en
Application granted granted Critical
Publication of KR100465804B1 publication Critical patent/KR100465804B1/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1306—Details
    • G02F1/1309—Repairing; Testing
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/71—Circuitry for evaluating the brightness variation
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02F2203/00—Function characteristic
    • G02F2203/69—Arrangements or methods for testing or calibrating a device
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

Abstract

PURPOSE: A system and a method for correcting brightness distortion are provided to meet the size of the completed LCD(Liquid Crystal Display) panel for checking and correct exactly the brightness distortion. CONSTITUTION: A backlight(14) is a reference light emitting device which is used in order to correct the brightness distortion when checking badness of the LCD panel. A diffusion filter(12) is installed to an upper portion of the backlight(14) and controls the brightness of the backlight(14) uniformly. An image acquisition device(10) obtains image and brightness data of the backlight(14) and the completed checking LCD. A light intensity meter measures the brightness of a diffusion filter surface. An image processing unit(15) stores variation obtained from the brightness data measured by the light intensity meter and image and brightness data of the diffusion filter surface and thereafter applies it to the brightness data of the completed checking LCD, thereby correcting the brightness distortion.

Description

밝기왜곡보정시스템 및 밝기왜곡보정방법 {Distorted Brightness Compensation System and Distorted Brightness Compensation Method}Distorted Brightness Compensation System and Distorted Brightness Compensation Method

본 발명은, 밝기왜곡보정시스템 및 밝기왜곡보정방법에 관한 것으로서, 보다 상세하게는 완성된 LCD판넬의 불량검사를 정확하게 하기 위한 밝기왜곡보정시스템 및 밝기왜곡보정방법에 관한 것이다.The present invention relates to a brightness distortion correction system and a brightness distortion correction method. More particularly, the present invention relates to a brightness distortion correction system and a brightness distortion correction method for accurately inspecting a defective LCD panel.

일반적으로 영상취득수단(보통 카메라)을 사용하여 발광체의 영상을 취득할 때 발광체자체의 밝기가 불균일해서 발생하는 밝기왜곡과 영상취득수단의 렌즈(보통 카메라렌즈)가 곡면으로 되어있기 때문에 렌즈의 곡면에 의해 형태가 뒤틀리는 형태왜곡 및 영상취득수단렌즈의 가운데가 밝고 주변이 어두운 밝기왜곡이 발생한다. 이러한 왜곡 때문에 완성된 LCD판넬의 불량검사를 할 경우 에러율이 높아지는 문제가 발생한다. 그러므로 완성된 LCD판넬의 불량검사를 정확하게 하기 위해서는 이러한 왜곡들을 보정해야할 필요성이 있다. 영상취득수단의 렌즈로 인한 형태왜곡을 보정하는 시스템 및 방법은 여럿 있다.In general, when the image of the light emitting body is acquired by using the image acquiring means (usually a camera), the brightness distortion caused by the uneven brightness of the light emitting body itself and the lens of the image acquiring means (usually the camera lens) are curved surfaces. Due to the shape distortion caused by the shape distortion and the brightness distortion in the center of the image acquisition means lens is dark. Due to this distortion, when the defective inspection of the finished LCD panel, the error rate increases. Therefore, it is necessary to correct these distortions in order to accurately inspect the defective LCD panel. There are several systems and methods for correcting shape distortion due to the lens of the image acquisition means.

영상취득수단의 렌즈로 인한 밝기왜곡과 발광체자체의 밝기가 불균일해서 발생하는 밝기왜곡을 통칭해서 단순히 밝기왜곡이라고 할 경우에 도 5는 이러한 밝기왜곡을 보정하는 종래 밝기왜곡보정시스템에서 영상취득수단을 사용하여 영상 및 밝기데이터를 취득하는 모습을 나타내는 도면이다.When the brightness distortion caused by the lens of the image acquisition means and the brightness distortion caused by uneven brightness of the light emitting body are collectively referred to simply as the brightness distortion, FIG. 5 shows the image acquisition means in the conventional brightness distortion correction system for correcting such brightness distortion. It is a figure which shows the state which acquires the image and brightness data using this.

도 5에 도시된 바와 같이, 종래 밝기왜곡보정시스템은 LCD판넬(미도시)의 불량검사시 밝기왜곡보정에 사용되는 하나의 크기가 고정된 기준발광체(종래에는 LCD판넬을 기준발광체로서 사용)(114)와, 기준발광체(114)와 완성된 검사대상 LCD판넬(미도시)의 영상 및 밝기데이터를 취득하기 위한 영상취득수단(110)과, 기준발광체(114)의 밝기데이터로부터 얻어낸 편차를 저장하여 LCD판넬(미도시)의 밝기데이터에 적용하여 밝기왜곡을 보정하는 영상처리부(115)를 포함한다.As shown in FIG. 5, the conventional brightness distortion correction system has one size fixed reference light emitting body used for brightness distortion correction during a defect inspection of an LCD panel (not shown) (in the past, an LCD panel is used as a reference light emitting body) ( 114, image acquisition means 110 for acquiring the image and brightness data of the reference light emitting body 114 and the completed LCD panel (not shown), and the deviation obtained from the brightness data of the reference light emitting body 114. The image processing unit 115 is applied to the brightness data of the LCD panel (not shown) to correct the brightness distortion.

도 5를 참조하면, 종래 밝기왜곡보정시스템에서는 밝기보정을 하기위해 기준발광체를 직접 광도계로 측정하는 것이 아니라 영상취득수단(110)을 사용하여 하나의 크기가 고정된 기준발광체(114)를 기준으로 취득된 영상 및 밝기데이터에서 밝기를 보정하였다. 즉, 세부적으로 상세히 설명하면, 첫째로, 크기가 고정된 기준발광체(114)를 영상취득수단(110) 아래로 이동한다. 그리고 둘째로, 영상취득수단(110)을 사용하여 크기가 고정된 기준발광체(114)를 촬영한다. 그 다음 셋째로, 취득되어진 영상 및 밝기데이터에서 발광면의 밝기데이터의 평균값을 산출한 후 각각의 픽셀을 평균값과 비교하여 편차를 산출하고 영상처리부(15)에 저장한다. 마지막 넷째로, 검사대상 LCD판넬(미도시)의 영상을 취득하여 저장된 편차를 적용한다.Referring to FIG. 5, in the conventional brightness distortion correction system, the reference light emitter is not directly measured by a photometer to correct the brightness, but based on the reference light emitter 114 having one size fixed using the image acquisition means 110. The brightness was corrected in the acquired image and brightness data. That is, in detail, first, the reference light emitter 114 having a fixed size is moved below the image acquisition means 110. Secondly, the reference light emitting body 114 having a fixed size is photographed using the image acquisition unit 110. Third, after calculating the average value of the brightness data of the light emitting surface from the obtained image and brightness data, the deviation is calculated by comparing each pixel with the average value and stored in the image processor 15. Lastly, take the image of the LCD panel (not shown) to be inspected and apply the stored deviation.

그러나 종래의 밝기왜곡보정시스템 및 밝기왜곡보정방법은 다음과 같은 문제점이 있다.However, the conventional brightness distortion correction system and brightness distortion correction method have the following problems.

첫째, 하나의 크기가 고정된 기준발광체를 사용함으로써 실제 검사하고자 하는 발광체 즉, 완성된 검사대상 LCD판넬의 크기의 변화에 민감하게 대응하지 못한다.First, by using a reference light emitter fixed in size, it does not respond sensitively to changes in the size of the light emitter to be inspected, that is, the completed LCD panel.

둘째, 기준발광체를 직접 광도계로 측정하지 않고 영상취득수단을 사용하여 취득된 영상 및 밝기데이터를 가지고 밝기왜곡보정을 하는 경우 하나의 크기가 고정된 기준발광체 자체의 밝기가 불균일해서 생기는 밝기왜곡과 영상취득수단의 렌즈왜곡 등으로 인해 정확한 밝기왜곡보정이 어렵다.Second, if the brightness distortion is corrected with the image and the brightness data acquired by using the image acquisition means without directly measuring the reference illuminometer, the brightness distortion and the image caused by the uneven brightness of the fixed reference illuminator itself Correct brightness distortion correction is difficult due to lens distortion of the acquisition means.

따라서 본 발명의 목적은, 실제 검사하고자 하는 발광체 즉, 완성된 검사대상 LCD판넬의 크기의 변화에 대응할 수 있고, 정확한 밝기왜곡보정을 가능하게 하는 밝기왜곡보정시스템 및 밝기왜곡보정방법을 제공하는 것이다.Accordingly, an object of the present invention is to provide a brightness distortion correction system and a brightness distortion correction method that can respond to changes in the size of a light emitting body to be inspected, that is, a completed inspection LCD panel, and enable accurate brightness distortion correction. .

도 1은 본 발명에 따른 밝기왜곡보정시스템에서 영상취득수단을 사용하여 기준발광체인 백라이트의 영상 및 밝기데이터를 취득하는 모습을 나타내는 도면이고,1 is a view showing a state of acquiring the image and brightness data of the backlight which is the reference light emitting body by using the image acquisition means in the brightness distortion correction system according to the present invention,

도 2는 본 발명에 따른 밝기왜곡보정시스템에서 백라이트위에 부착되어 분할된 확산필터면을 각각 광도계로 측정하는 모습을 나타내는 도면이고,FIG. 2 is a diagram illustrating a state in which a diffuse filter surface attached to a backlight is measured by a photometer in the brightness distortion correction system according to the present invention.

도 3은 본 발명에 따른 밝기왜곡보정시스템에서 영상취득수단을 사용하여 취득한 확산필터면의 밝기데이터와 확산필터면의 밝기데이터맵을 나타내는 도면이고,3 is a view showing the brightness data of the diffusion filter surface and the brightness data map of the diffusion filter surface acquired by the image acquisition means in the brightness distortion correction system according to the present invention;

도 4는 본 발명에 따른 밝기왜곡보정시스템에서 밝기왜곡보정방법을 나타내는 흐름도이고,4 is a flowchart illustrating a brightness distortion correction method in the brightness distortion correction system according to the present invention;

도 5는 종래 밝기왜곡보정시스템에서 영상취득수단을 사용하여 기준발광체의 영상 및 밝기데이터를 취득하는 모습을 나타내는 도면이다.5 is a view showing a state in which the image and the brightness data of the reference light-emitting body is acquired by using the image acquisition means in the conventional brightness distortion correction system.

* 도면의 주요 부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings

10 : 영상취득수단 12 : 확산필터10: image acquisition means 12: diffusion filter

14 : 기준발광체인 백라이트 15 : 영상처리부14: backlight of the reference light emitting body 15: the image processing unit

16 : 광도계 18 : 확산필터면16: photometer 18: diffusion filter surface

상기 목적은, 본 발명에 따라, LCD판넬의 불량검사시 밝기왜곡보정에 사용되는 기준발광체와, 상기 기준발광체와 상기 LCD판넬의 영상 및 밝기데이터를 취득하기 위한 영상취득수단과, 기준발광체의 밝기데이터로부터 얻어낸 편차를 저장하여 상기 LCD판넬의 밝기데이터에 적용하여 밝기왜곡을 보정하는 영상처리부를 포함하는 밝기왜곡보정시스템에 있어서, 상기 기준발광체는 백라이트이며, 상기 백라이트 위쪽에 마련되어 상기 백라이트의 밝기를 균일하게 하는 확산필터와, 상기 확산필터면의 밝기를 측정하는 광도계를 포함하는 것을 특징으로 하는 밝기왜곡보정시스템에 의해 달성된다.The object is, according to the present invention, the reference light emitting body used for the brightness distortion correction during the defect inspection of the LCD panel, the image acquisition means for acquiring the image and brightness data of the reference light emitting body and the LCD panel, and the brightness of the reference light emitting body A brightness distortion correction system comprising an image processing unit for correcting brightness distortion by storing deviation obtained from data and applying brightness data of the LCD panel, wherein the reference light emitter is a backlight and is provided above the backlight to adjust brightness of the backlight. And a photometer for measuring the brightness of the surface of the diffusion filter.

여기서, 상기 영상처리부는 상기 확산필터면을 광도계로 측정한 밝기데이터와 상기 영상취득수단을 통해 취득한 상기 확산필터면의 영상 및 밝기데이터로부터 얻어낸 편차를 저장한 후 상기 영상취득수단을 통해 취득한 상기 LCD판넬의 밝기데이터에 적용하여 밝기왜곡을 보정하는 것을 특징으로 하는 밝기왜곡보정시스템인 것이 바람직하다.Here, the image processing unit stores the deviation data obtained from the brightness data measured by the diffuse filter surface with a photometer and the image and brightness data of the diffuse filter surface obtained through the image acquisition means, and the LCD obtained through the image acquisition means. Preferably, the brightness distortion correction system is characterized by correcting the brightness distortion by applying to the brightness data of the panel.

한편, 상기 목적은 본 발명의 다른 분야에 따르면, LCD판넬의 불량검사시 밝기왜곡보정에 사용되는 밝기왜곡보정시스템의 밝기왜곡보정방법에 있어서, 기준발광체인 백라이트위에 확산필터를 부착하는 단계와; 상기 확산필터면을 수개로 분할해서 광도계로 각각 측정하는 단계와; 상기 광도계로 측정한 데이터로 세로방향의 직선의 방정식과 가로방향의 직선의 방정식을 산출하여 상기 확산필터면의 밝기데이터맵을 작성하는 단계와; 영상취득수단을 사용하여 상기 확산필터면의 영상 및 밝기데이터를 취득하는 단계와; 상기 확산필터면의 밝기데이터맵과 상기 영상취득수단을 사용하여 취득한 상기 확산필터면의 밝기데이터와의 편차를 픽셀별로 산출하여 영상처리부에 저장하는 단계와; 상기 영상취득수단을 사용하여 검사대상 LCD판넬의 영상 및 밝기데이터를 취득한 다음 상기 영상처리부에 저장된 편차를 상기 취득한 검사대상 LCD판넬의 밝기데이터에 적용하는 단계를 포함하는 것을 특징으로 하는 밝기왜곡보정방법에 의해서도 달성된다.Meanwhile, according to another aspect of the present invention, there is provided a brightness distortion correction method of a brightness distortion correction system used for brightness distortion correction during a defect inspection of an LCD panel, the method comprising: attaching a diffusion filter on a backlight that is a reference light emitter; Dividing the diffusion filter surface into several and measuring each with a photometer; Calculating brightness equations of the surface of the diffusion filter by calculating equations of a straight line in a vertical direction and an equation of a straight line in a horizontal direction using the data measured by the photometer; Acquiring image and brightness data of the diffusion filter surface by using image acquisition means; Calculating a pixel-by-pixel deviation between the brightness data map of the diffusion filter surface and the brightness data of the diffusion filter surface acquired using the image acquisition means and storing the pixel in the image processing unit; Acquiring image and brightness data of the inspection target LCD panel using the image acquisition means, and then applying the deviation stored in the image processing unit to the brightness data of the acquired inspection target LCD panel. It is also achieved by

여기서, 상기 확산필터면의 밝기데이터맵과 상기 영상취득수단을 사용하여 취득한 상기 확산필터면의 밝기데이터와의 편차를 픽셀별로 산출하여 영상처리부에 저장하는 단계 이전에 상기 영상취득수단을 사용하여 취득한 상기 확산필터면의 영상을 상기 백라이트에 부착한 확산필터면과 동일하게 분할한 후 상기 영상취득수단을 사용하여 취득한 상기 확산필터면의 밝기데이터의 밝기범위로 상기 확산필터면의 밝기데이터맵의 밝기범위를 비례적으로 맞추는 단계를 더 포함하는 것을 특징으로 하는 밝기왜곡보정방법인 것이 바람직하다.Here, the deviation between the brightness data map of the diffusion filter surface and the brightness data of the diffusion filter surface obtained by using the image acquisition means is obtained by using the image acquisition means before the step of calculating for each pixel and storing it in the image processing unit. After dividing the image of the diffusion filter surface in the same manner as the diffusion filter surface attached to the backlight, the brightness of the brightness data map of the diffusion filter surface in the brightness range of the brightness data of the diffusion filter surface obtained by using the image acquisition means. It is preferable that the brightness distortion correction method further comprises the step of proportionally adjusting the range.

이하에서는 첨부 도면을 참조하여 본 발명에 대해 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 밝기왜곡보정시스템에서 영상취득수단을 사용하여 영상 및 밝기데이터를 취득하는 모습을 나타내는 도면이다.1 is a view showing a state of acquiring the image and the brightness data using the image acquisition means in the brightness distortion correction system according to the present invention.

도 2는 본 발명에 따른 밝기왜곡보정시스템에서 백라이트위에 부착되어 분할된 확산필터면을 각각 광도계로 측정하는 모습을 나타내는 도면이다.FIG. 2 is a diagram illustrating a state in which a diffuse filter surface attached to a backlight is measured by a photometer in the brightness distortion correction system according to the present invention.

도 1과 도 2에 도시된 바와 같이, 본 발명에 따른 밝기왜곡보정시스템은 LCD판넬(미도시)의 불량검사시 밝기왜곡보정에 사용되는 기준발광체로서의 백라이트(14)와, 백라이트(14)위쪽에 마련되어 백라이트(14)의 밝기를 균일하게 하는 확산필터(12)와, 기준발광체인 백라이트(14)와 완성된 검사대상 LCD판넬(미도시)의 영상 및 밝기데이터를 취득하기 위한 영상취득수단(10)과, 확산필터면(18)의 밝기를 측정하는 광도계(16)와, 확산필터면(18)을 광도계(16)로 측정한 밝기데이터와 영상취득수단(10)을 통해 취득한 확산필터면(18)의 영상 및 밝기데이터로부터 얻어낸 편차를 저장한 후 영상취득수단(10)을 통해 취득한 완성된 검사대상 LCD판넬(미도시)의 밝기데이터에 적용하여 밝기왜곡을 보정하는 영상처리부(15)를 포함한다.1 and 2, the brightness distortion correction system according to the present invention is a backlight 14 as a reference light emitting body used for brightness distortion correction during defect inspection of the LCD panel (not shown), and the backlight 14 above An image acquisition means for acquiring an image and brightness data of a diffusion filter 12 provided in the backlight 14 to make the brightness of the backlight 14 uniform, a backlight 14 which is a reference light emitter, and a completed LCD panel (not shown) ( 10), the photometer 16 for measuring the brightness of the diffusion filter surface 18, and the brightness data obtained by measuring the diffusion filter surface 18 with the photometer 16 and the diffusion filter surface obtained through the image acquisition means 10. An image processor (15) for correcting the brightness distortion by storing the deviation obtained from the image and the brightness data of (18) and then applying it to the brightness data of the completed LCD panel (not shown) acquired through the image acquisition means (10). It includes.

도 1을 참조하면, 본 발명에 따른 밝기왜곡보정시스템은 백라이트(Back Light)를 기준발광체(14)로 사용하며 또한 추가적으로 그 위에 확산필터(12)를 부착한다. 백라이트(Back Light)를 기준발광체(14)로 사용하는 이유는 백라이트(Back Light)(14)의 밝기가 종래의 기준발광체였던 LCD판넬의 밝기보다 균일하기 때문이다. 그리고 그 위에 확산필터(12)를 부착하는 이유는 더욱더 최대한 기준발광체인 백라이트(Back Light)(14)의 밝기를 균일하게 유지함으로써 발광체 자체의 밝기가 불균일해서 발생하는 밝기왜곡을 배제하기 위함이다.Referring to FIG. 1, the brightness distortion correction system according to the present invention uses a back light as a reference light emitter 14 and additionally attaches a diffusion filter 12 thereon. The reason why the back light is used as the reference light emitter 14 is that the brightness of the back light 14 is more uniform than that of the LCD panel which is a conventional reference light emitter. The reason why the diffusion filter 12 is attached thereon is to eliminate brightness distortion caused by uneven brightness of the light emitter itself by keeping the brightness of the backlight (Back Light) 14 that is the reference light emitter as much as possible.

도 2를 참조하면, 백라이트위에 부착된 확산필터(12)는 그 면이 분할되어 확산필터면(18)의 분할된 면 각각이 광도계(16)에 의해 측정된다. 이러한 작업은 후에 영상취득수단의 렌즈로 인한 밝기왜곡을 보정하기 위해서 작성되는 확산필터면의 밝기데이터맵 작성을 위함이다.Referring to FIG. 2, the diffusion filter 12 attached to the backlight is divided so that each of the divided surfaces of the diffusion filter surface 18 is measured by the photometer 16. This operation is for the purpose of creating a brightness data map of the diffusion filter surface which is created later to correct the brightness distortion caused by the lens of the image acquisition means.

도 3은 본 발명에 따른 밝기왜곡보정시스템에서 영상취득수단을 사용하여 취득한 확산필터면의 밝기데이터와 확산필터면의 밝기데이터맵을 나타내는 도면이다.3 is a diagram showing brightness data of the diffusion filter surface and brightness data map of the diffusion filter surface acquired by the image acquisition means in the brightness distortion correction system according to the present invention.

도 3을 참조하면, 도 1에 나타난 모습을 통해서 영상취득수단을 사용하여 취득한 확산필터면의 밝기데이터가 얻어지고 도 2에 나타난 모습을 통해서 확산필터면의 밝기데이터맵이 얻어진다. 이것들은 영상취득수단의 렌즈로 인한 밝기왜곡을 보정하는 데 쓰인다.Referring to FIG. 3, the brightness data of the diffusion filter surface obtained using the image acquisition means is obtained through the state shown in FIG. 1, and the brightness data map of the diffusion filter surface is obtained through the state shown in FIG. These are used to correct the brightness distortion caused by the lens of the image acquisition means.

도 4는 본 발명에 따른 밝기왜곡보정시스템에서 밝기왜곡보정방법을 나타내는 흐름도이다. 이 흐름도를 통해서 전술한 도면들에 대한 설명들을 좀더 유기적으로 자세하게 이해할 수 있다.4 is a flowchart illustrating a brightness distortion correction method in the brightness distortion correction system according to the present invention. Through this flowchart, the descriptions of the above-described drawings can be understood in more organic detail.

도 4를 참조하면, 먼저 기준발광체인 백라이트(Back Light)위에 확산필터를 부착한다(S10). 그 다음에는 확산필터면을 수개로 분할해서 광도계로 각각 측정한다(S12). 그리고 광도계로 측정한 데이터로 세로방향의 직선의 방정식과 가로방향의 직선의 방정식을 산출하여 확산필터면의 밝기데이터맵을 작성한다(S14). 그 후에는 영상취득수단으로 확산필터면의 영상 및 밝기데이터를 취득한다(S16). 그 다음에는 영상취득수단으로 취득한 확산필터면의 영상을 백라이트에 부착한 확산필터면과 동일하게 분할한 후 영상취득수단으로 취득한 확산필터면의 밝기데이터의 밝기범위로 확산필터면의 밝기데이터맵의 밝기범위를 비례적으로 맞춘다(S18). 가령, 영상취득수단으로 취득한 확산필터면의 밝기데이터의 밝기범위가 0~4000칸델라(cd)이고, 확산필터면의 밝기데이터맵의 밝기범위가 0~700칸델라(cd)라면 확산필터면의 밝기데이터맵의 밝기범위도 영상취득수단으로 취득한 확산필터면의 밝기데이터의 밝기범위인 0~4000칸델라(cd)로 비례적으로 맞춘다는 말이다. 그 후에는 확산필터면의 밝기데이터맵과 영상취득수단으로 취득한 확산필터면의 밝기데이터와의 편차를 픽셀별로 산출하여 영상처리부에 저장한다(S20). 그리고 영상취득수단으로 검사대상 LCD판넬의 영상 및 밝기데이터를 취득한 후 영상처리부에 저장된 편차를 취득한 검사대상 LCD판넬의 밝기데이터에 적용한다(S22).Referring to FIG. 4, first, a diffusion filter is attached to a backlight that is a reference light emitter (S10). Then, the diffusion filter surface is divided into several and measured with a photometer (S12). Using the data measured by the photometer, the equation of the straight line in the vertical direction and the equation of the straight line in the horizontal direction is calculated to create a brightness data map of the diffusion filter surface (S14). After that, the image and brightness data of the diffusion filter surface are acquired by the image acquisition means (S16). Next, the image of the diffusion filter surface obtained by the image acquisition means is divided in the same manner as the diffusion filter surface attached to the backlight, and then the brightness data map of the diffusion filter surface is divided into the brightness range of the brightness data of the diffusion filter surface obtained by the image acquisition means. Adjust the brightness range proportionally (S18). For example, if the brightness range of the brightness data of the diffusion filter surface obtained by the image acquisition means is 0 to 4000 candela (cd), and the brightness range of the brightness data map of the diffusion filter surface is 0 to 700 candela (cd), the brightness of the diffusion filter surface The brightness range of the data map is also proportionally adjusted to 0 to 4000 candelas (cd), which is the brightness range of the brightness data of the diffusion filter surface obtained by the image acquisition means. Thereafter, the deviation between the brightness data map of the diffusion filter surface and the brightness data of the diffusion filter surface acquired by the image acquisition means is calculated for each pixel and stored in the image processing unit (S20). After the image and brightness data of the inspection target LCD panel are acquired by the image acquisition means, the deviation is stored in the image processing unit and applied to the brightness data of the inspection target LCD panel (S22).

이상에서 설명한 바와 같이, 본 발명에 따르면, 기준발광체로 백라이트(Back Light)를 사용하고 그 위에 확산필터를 부착함으로써 발광체 자체의 밝기가 불균일해서 생기는 밝기왜곡을 배제할 수 있다. 그리고, 종래 하나의 크기가 고정된 기준발광체를 사용했기 때문에 실제 검사하고자 하는 완성된 LCD판넬의 크기변화에 민감하게 대응하지 못하는 문제점은 밝기가 균일한 백라이트(Back Light)를 기준발광체로 사용함으로써 제거될 수 있다. 또한, 기준발광체위에 부착한 확산필터를 수개의 면으로 분할하여 광도계로 각각 측정한 데이터로 작성된 확산필터면의 밝기데이터맵과 영상취득수단을 사용하여 취득한 확산필터면의 밝기데이터를 통해 각 픽셀별로 편차를 산출하고 산출된 편차를 영상처리부에 저장한 후 그 저장된 편차를 실제 검사하고자 하는 완성된 LCD판넬의 밝기데이터에 적용함으로써 카메라렌즈로 인한 밝기왜곡을 보정할 수 있다.As described above, according to the present invention, by using a back light as a reference light emitter and attaching a diffusion filter thereon, it is possible to exclude brightness distortion caused by uneven brightness of the light emitter itself. In addition, the problem of not being able to respond sensitively to the size change of the finished LCD panel to be actually inspected because one size of the conventional reference light emitter is used is eliminated by using a backlight having uniform brightness as the reference light emitter. Can be. In addition, each pixel is divided by the brightness data map of the diffusion filter surface made of the data measured by the photometer by dividing the diffusion filter attached to the reference light emitting body into several planes and the brightness data of the diffusion filter surface obtained by using image acquisition means. By calculating the deviation and storing the calculated deviation in the image processing unit, it is possible to correct the brightness distortion due to the camera lens by applying the stored deviation to the brightness data of the completed LCD panel to be actually examined.

이상 설명한 바와 같이, 본 발명에 따르면, 실제 검사하고자 하는 발광체 즉, 완성된 LCD판넬의 크기의 변화에 대응할 수 있고, 정확한 밝기왜곡보정을 가능하게 하는 밝기왜곡보정시스템 및 밝기왜곡보정방법이 제공된다.As described above, according to the present invention, there is provided a brightness distortion correction system and a brightness distortion correction method that can respond to changes in the size of a light emitting body to be inspected, that is, a completed LCD panel, and enable accurate brightness distortion correction. .

Claims (4)

LCD판넬의 불량검사시 밝기왜곡보정에 사용되는 기준발광체와, 상기 기준발광체와 상기 LCD판넬의 영상 및 밝기데이터를 취득하기 위한 영상취득수단과, 기준발광체의 밝기데이터로부터 얻어낸 편차를 저장하여 상기 LCD판넬의 밝기데이터에 적용하여 밝기왜곡을 보정하는 영상처리부를 포함하는 밝기왜곡보정시스템에 있어서,A reference illuminant used for brightness distortion correction during defect inspection of the LCD panel, image acquisition means for acquiring images and brightness data of the reference illuminator and the LCD panel, and a deviation obtained from the brightness data of the reference illuminator; In the brightness distortion correction system comprising an image processor for correcting the brightness distortion by applying to the brightness data of the panel, 상기 기준발광체는 백라이트이며,The reference light emitting body is a backlight, 상기 백라이트 위쪽에 마련되어 상기 백라이트의 밝기를 균일하게 하는 확산필터와,A diffusion filter provided above the backlight to uniform brightness of the backlight; 상기 확산필터면의 밝기를 측정하는 광도계를 포함하는 것을 특징으로 하는 밝기왜곡보정시스템.And a photometer for measuring the brightness of the diffusion filter surface. 제 1항에 있어서,The method of claim 1, 상기 영상처리부는 상기 확산필터면을 광도계로 측정한 밝기데이터와 상기 영상취득수단을 통해 취득한 상기 확산필터면의 영상 및 밝기데이터로부터 얻어낸 편차를 저장한 후 상기 영상취득수단을 통해 취득한 상기 LCD판넬의 밝기데이터에 적용하여 밝기왜곡을 보정하는 것을 특징으로 하는 밝기왜곡보정시스템.The image processing unit stores the deviation data obtained from the brightness data measured by the photometric filter on the diffusion filter surface and the image and brightness data of the diffusion filter surface obtained through the image acquisition means, Brightness distortion correction system, characterized in that to correct the brightness distortion applied to the brightness data. LCD판넬의 불량검사시 밝기왜곡보정에 사용되는 밝기왜곡보정시스템의 밝기왜곡보정방법에 있어서,In the brightness distortion correction method of the brightness distortion correction system used for the brightness distortion correction when the LCD panel defect inspection, 기준발광체인 백라이트위에 확산필터를 부착하는 단계와;Attaching a diffusion filter on a backlight which is a reference light emitting body; 상기 확산필터면을 수개로 분할해서 광도계로 각각 측정하는 단계와;Dividing the diffusion filter surface into several and measuring each with a photometer; 상기 광도계로 측정한 데이터로 세로방향의 직선의 방정식과 가로방향의 직선의 방정식을 산출하여 상기 확산필터면의 밝기데이터맵을 작성하는 단계와;Calculating brightness equations of the surface of the diffusion filter by calculating equations of a straight line in a vertical direction and an equation of a straight line in a horizontal direction using the data measured by the photometer; 영상취득수단을 사용하여 상기 확산필터면의 영상 및 밝기데이터를 취득하는 단계와;Acquiring image and brightness data of the diffusion filter surface by using image acquisition means; 상기 확산필터면의 밝기데이터맵과 상기 영상취득수단을 사용하여 취득한 상기 확산필터면의 밝기데이터와의 편차를 픽셀별로 산출하여 영상처리부에 저장하는 단계와;Calculating a pixel-by-pixel deviation between the brightness data map of the diffusion filter surface and the brightness data of the diffusion filter surface acquired using the image acquisition means and storing the pixel in the image processing unit; 상기 영상취득수단을 사용하여 검사대상 LCD판넬의 영상 및 밝기데이터를 취득한 다음 상기 영상처리부에 저장된 편차를 상기 취득한 검사대상 LCD판넬의 밝기데이터에 적용하는 단계를 포함하는 것을 특징으로 하는 밝기왜곡보정방법.Acquiring image and brightness data of the inspection target LCD panel using the image acquisition means, and then applying the deviation stored in the image processing unit to the brightness data of the acquired inspection target LCD panel. . 제 3항에 있어서,The method of claim 3, wherein 상기 확산필터면의 밝기데이터맵과 상기 영상취득수단을 사용하여 취득한 상기 확산필터면의 밝기데이터와의 편차를 픽셀별로 산출하여 영상처리부에 저장하는 단계 이전에 상기 영상취득수단을 사용하여 취득한 상기 확산필터면의 영상을 상기 백라이트에 부착한 확산필터면과 동일하게 분할한 후 상기 영상취득수단을 사용하여 취득한 상기 확산필터면의 밝기데이터의 밝기범위로 상기 확산필터면의 밝기데이터맵의 밝기범위를 비례적으로 맞추는 단계를 더 포함하는 것을 특징으로 하는 밝기왜곡보정방법.The diffusion between the brightness data map of the diffusion filter surface and the brightness data of the diffusion filter surface acquired using the image acquisition means for each pixel and storing the difference in the image processing unit before the diffusion. After dividing the image of the filter surface in the same manner as the diffusion filter surface attached to the backlight, the brightness range of the brightness data map of the diffusion filter surface is determined by the brightness range of the brightness data of the diffusion filter surface obtained using the image acquisition means. Brightness distortion correction method further comprising the step of proportionally matching.
KR10-2002-0085061A 2002-12-27 2002-12-27 Distorted Brightness Compensation System and Distorted Brightness Compensation Method KR100465804B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR10-2002-0085061A KR100465804B1 (en) 2002-12-27 2002-12-27 Distorted Brightness Compensation System and Distorted Brightness Compensation Method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR10-2002-0085061A KR100465804B1 (en) 2002-12-27 2002-12-27 Distorted Brightness Compensation System and Distorted Brightness Compensation Method

Publications (2)

Publication Number Publication Date
KR20040058688A true KR20040058688A (en) 2004-07-05
KR100465804B1 KR100465804B1 (en) 2005-01-13

Family

ID=37350763

Family Applications (1)

Application Number Title Priority Date Filing Date
KR10-2002-0085061A KR100465804B1 (en) 2002-12-27 2002-12-27 Distorted Brightness Compensation System and Distorted Brightness Compensation Method

Country Status (1)

Country Link
KR (1) KR100465804B1 (en)

Also Published As

Publication number Publication date
KR100465804B1 (en) 2005-01-13

Similar Documents

Publication Publication Date Title
US10798373B2 (en) Display correction apparatus, program, and display correction system
US5764209A (en) Flat panel display inspection system
KR100189178B1 (en) Lcd panel test apparatus having means for correcting data difference among test apparatus
US20110012908A1 (en) System for compensation of differential aging mura of displays
US20190228737A1 (en) Screen Calibration Method and Screen Calibration System Capable of Correcting Full Screen Color Tones Automatically
JP2008250319A (en) Reduction method of mura defect and display
US8045788B2 (en) Product setup sharing for multiple inspection systems
CN109147707A (en) Gamma value adjusting method, device and the display equipment of display panel
KR100397080B1 (en) Flat Display Inspection System
CN108986170A (en) A kind of line-scan digital camera method for correcting flat field suitable for field working conditions
US10970846B1 (en) Repairing method for Mura in display panel
KR100465804B1 (en) Distorted Brightness Compensation System and Distorted Brightness Compensation Method
JPH0875542A (en) Method for measuring quantity of light for display pixel, and method and apparatus for inspecting display screen
JPS63100304A (en) Light cutting line measuring instrument
CN115452325A (en) Optical module ghost detection method, detection device and medium
CN110428793B (en) Brightness correction system and method
JP2006266786A (en) Display inspection device for electro-optical device, and display inspection method
KR101999111B1 (en) Reference panel mounting jig and color over pixel check method for display panel vision inspection
KR100517324B1 (en) Method for inspecting dot badness in a flat panel display module
KR100768122B1 (en) Apparatus for testing panel status and method thereof
KR20200044252A (en) Display apparatus inspection system, inspection method of display apparatus and display apparatus using the same
WO2022006755A1 (en) Display control device and method for obtaining light intensity distribution of backlight panel
KR100623072B1 (en) The Visual Inspection System for Lens, using Computer Monitor as Light Source and Chart
KR200373271Y1 (en) The Visual Inspection System for Lens, using Computer Monitor as Light Source and Chart
CN117516886A (en) Error verification method of visible light spot target quantitative test system

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20121130

Year of fee payment: 9

FPAY Annual fee payment

Payment date: 20131129

Year of fee payment: 10

LAPS Lapse due to unpaid annual fee