WO2011129042A1 - Method for inspecting liquid crystal display panel, and inspection gauge - Google Patents

Method for inspecting liquid crystal display panel, and inspection gauge Download PDF

Info

Publication number
WO2011129042A1
WO2011129042A1 PCT/JP2011/000760 JP2011000760W WO2011129042A1 WO 2011129042 A1 WO2011129042 A1 WO 2011129042A1 JP 2011000760 W JP2011000760 W JP 2011000760W WO 2011129042 A1 WO2011129042 A1 WO 2011129042A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
crystal display
display panel
colored
inspection
Prior art date
Application number
PCT/JP2011/000760
Other languages
French (fr)
Japanese (ja)
Inventor
平野高昭
Original Assignee
シャープ株式会社
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 シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2011129042A1 publication Critical patent/WO2011129042A1/en

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/463—Colour matching
    • 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
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/506—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors measuring the colour produced by screens, monitors, displays or CRTs

Definitions

  • the present invention relates to a liquid crystal display panel inspection method and inspection gauge.
  • the liquid crystal display panel includes a TFT substrate in which thin film transistors (hereinafter referred to as TFTs) are formed in a plurality of pixels, a counter substrate disposed to face the TFT substrate, the TFT substrate, And a liquid crystal layer provided between the counter substrates.
  • TFTs thin film transistors
  • Defective pixels occur when there is an electrical failure or malfunction in the TFT.
  • a so-called bright spot defect occurs in the pixel.
  • a so-called black spot defect occurs in the pixel.
  • the liquid crystal display panel may have a display color tone (color tone), partial color unevenness, and the like, and those whose degree exceeds a certain allowable limit are regarded as display defects.
  • liquid crystal display panels have different display defect tolerance limits depending on applications such as TVs, projectors, and video camera viewfinders. Therefore, when inspecting a display defect, as shown in FIG. 4 which is a plan view of a liquid crystal display panel, a liquid crystal display as a limit sample 101 for displaying a display defect 110 of an allowable limit set according to each application. The panel is acquired, and the limit sample 101 and the liquid crystal display panel 102 to be inspected are inspected by comparing with the inspector's vision.
  • the liquid crystal display panel 102 to be inspected is a non-defective product. It is said. On the other hand, if the inspector determines that the degree of the display defect 120 in the liquid crystal display panel 102 to be inspected is higher than the degree of the display defect 110 in the limit sample 101, the liquid crystal display panel 102 to be inspected is not acceptable. It is considered a good product.
  • the above limit sample is a sample in which a display defect has occurred, a plurality of limit samples that appropriately display the allowable limit display defect are obtained according to each application of the liquid crystal display panel. That is extremely difficult. Therefore, it is difficult to prepare limit samples as many as the number of inspectors, and inspectors who do not have limit samples at hand may have to inspect based on their own memory.
  • the limit sample liquid crystal display panel often has unstable display defects, and the degree of defects may change over time. For this reason, there is a problem in that the inspection criteria are changed, so that the inspection results vary and the inspection accuracy is lowered. In addition, the limit sample cannot be used for inspection of liquid crystal display panels for other uses.
  • Patent Document 1 a pseudo defect generation device artificially creates a state equivalent to a display defect of a liquid crystal display panel of a product by an electric signal, and displays this on a sample liquid crystal display panel as an example. It is disclosed.
  • liquid crystal display panel as a limit sample needs to be lit at the time of inspection, and thus there is a problem that electric power is required for the inspection.
  • the present invention has been made in view of such various points, and a main object thereof is to inspect a display defect of a liquid crystal display panel with a high accuracy by a simple inspection means.
  • a liquid crystal display panel inspection method for discriminating display defects of a liquid crystal display panel, comprising: a transparent substrate; and the transparent substrate An inspection gauge having a plurality of colored regions that are formed on the display region of the liquid crystal display panel, each colored region of the inspection gauge, and the display region And comparing the display color with each other to determine a display defect of the liquid crystal display panel.
  • the inspection gauge according to the present invention is an inspection gauge for discriminating a display defect of a liquid crystal display panel, and is formed on a transparent base material and the transparent base material and colored in different colors. And a plurality of colored regions.
  • the display defect of the liquid crystal display panel is determined using an inspection gauge. That is, first, an inspection gauge is overlaid on the display area of the liquid crystal display panel. In the inspection gauge, a plurality of colored regions colored in different colors are formed on a transparent substrate. Then, when the inspector compares the color of each colored area in the inspection gauge with the color of the display area, it is possible to easily determine the display defect of the display area.
  • the colored areas of the inspection gauge are colored in the same hue, it is possible to easily discriminate even if there is a slight difference in saturation or brightness.
  • the colors of each colored area are defined based on the three primary colors RGB, the reproducibility is excellent, so that the color of each colored area can be adjusted with high accuracy, and the color patterns of the plurality of colored areas are the same. It is possible to accurately form a plurality of inspection gauges.
  • the display defect of the liquid crystal display panel is determined by the inspection gauge having a plurality of colored regions formed on the transparent substrate and colored in different colors.
  • a panel display defect can be inspected with high accuracy by an inspection gauge which is a simple inspection means.
  • FIG. 1 is a plan view showing a liquid crystal display panel on which inspection gauges are stacked.
  • FIG. 2 is a plan view showing the appearance of the inspection gauge.
  • FIG. 3 is a table showing numerical values defining the color of each colored region in the inspection gauge.
  • FIG. 4 is a plan view showing a liquid crystal display panel as a conventional limit sample and a liquid crystal display panel to be inspected.
  • Embodiment 1 of the Invention 1 to 3 show Embodiment 1 of the present invention.
  • FIG. 1 is a plan view showing a liquid crystal display panel on which inspection gauges are stacked.
  • FIG. 2 is a plan view showing the appearance of the inspection gauge.
  • FIG. 3 is a table showing numerical values defining the color of each colored region in the inspection gauge.
  • the liquid crystal display panel 10 is provided between a TFT substrate 11 as an active matrix substrate, a counter substrate 12 disposed to face the TFT substrate 11, and the TFT substrate 11 and the counter substrate 12.
  • Liquid crystal layer (not shown).
  • the liquid crystal display panel 10 includes a display area 31 and a frame-like non-display area 32 provided around the display area 31.
  • a plurality of pixels (not shown) arranged in a matrix are formed.
  • the counter substrate 12 is provided with a color filter, a common electrode, etc. (not shown).
  • the liquid crystal layer is sealed by a sealing member (not shown) provided between the TFT substrate 11 and the counter substrate 12.
  • the TFT substrate 11 On the other hand, on the TFT substrate 11, a pixel electrode (not shown) and a TFT (not shown) connected to the pixel electrode are formed in each pixel.
  • the TFT substrate 11 has a terminal region 14 that does not face the counter substrate 12, and a driver circuit 15 and a flexible printed circuit (FPC) 16 are mounted on the terminal region 14.
  • FPC flexible printed circuit
  • the inspection gauge 20 includes a transparent film 21 as a transparent substrate, and a plurality of colored regions 22 formed on the transparent film 21 and colored in different colors. Yes.
  • the inspection gauge 20 is used to determine a display defect of the liquid crystal display panel 10.
  • the transparent film 21 is composed of a transparent resin film formed in a horizontally long rectangle.
  • a resin material of the transparent film 21 for example, a color printed OHP sheet sandwiched between pouch films and thermocompression bonded can be exemplified.
  • a transparent plastic substrate, a glass substrate, or the like can be applied as the transparent base material constituting the inspection gauge 20.
  • the plurality of colored regions 22 are arranged at predetermined intervals in the length direction of the transparent film 21 (left-right direction in FIG. 2). In the present embodiment, for example, five colored regions 22 are formed, and identification symbols A to E are written on the transparent film 21 in order from the left in FIG.
  • the colored regions 22 are colored in the same hue.
  • each colored region 22 is colored yellow.
  • the colored regions 22 are colored so that at least one of saturation and brightness is different from each other.
  • region 22 is prescribed
  • each colored region 22 is defined based on the three primary colors RGB. That is, as shown in FIG. 3, each color of R, G, and B is defined by numerical values of 0 to 255. For example, when the numerical value of R gradually increases from 0 to 255, the color of R changes from black to bright red. Similarly, the color G changes from black to light green and the color B changes from black to light blue.
  • each colored region 22 of A to E has a constant value of R of 255 and a constant value of 250 of G, respectively.
  • B of each colored region 22 of A to E is defined as A is 239, B is 229, C is 219, D is 209, and E is 199.
  • the colored regions 22 of A to E are colored so as to gradually change from light yellow to yellow having a strong color tone in the order of arrangement from the left A to the right E.
  • the colored regions 22 of A to E can be formed by, for example, an ink jet printing method or a laser printing method.
  • the inspection method is performed in the manufacturing process of the liquid crystal display panel 10.
  • the liquid crystal display panel 10 is manufactured by bonding the TFT substrate 11 and the counter substrate 12 through a liquid crystal material and a seal member.
  • an inspection signal is input to the liquid crystal display panel 10 to display an inspection image in the display area 31, and display defects such as color tone (color tone) and color unevenness of the display are determined.
  • an inspection signal is input to the liquid crystal display panel 10 so that yellow (reference color) with a predetermined color is displayed in the entire display area 31.
  • the inspection gauge 20 is overlaid on the display area 31 of the liquid crystal display panel 10 as shown in FIG. Then, the inspector directly compares each colored area 22 of the inspection gauge 20 and the display color (the predetermined yellow color) in the display area 31.
  • the entire display area 31 and the color unevenness are within the color range of the colored areas 22 of A to C, it is determined that there is no display defect and the liquid crystal display panel 10 is a good product. On the other hand, if the entire display area 31 and the color unevenness are out of the above range, it is determined that there is a display defect and the liquid crystal display panel 10 is defective.
  • an inspection signal is input to the liquid crystal display panel 10 so that the liquid crystal display panel 10 displays the same color as the colored region 22 of B.
  • color unevenness having the same color as that of the D colored area 22 is displayed and exceeds the range of A to C, so that it is determined that there is a display defect. Is done.
  • the color of the entire display region 31 and the color unevenness is equal to or greater than the color of the D colored region 22, for example, there is no display defect, and if it is less than the color of the D colored region 22, it is determined that there is a display defect. You may make it do.
  • the display defect of the liquid crystal display panel 10 is determined by the inspection gauge 20 that is formed on the transparent film 21 and has a plurality of colored regions 22 that are colored in different colors. Therefore, the inspector can directly compare the color of the colored region 22 of the inspection gauge 20 superimposed on the display region 31 with the color of the display in the display region 31, so that the liquid crystal display panel 10 can be compared. Display defects can be inspected with high accuracy by the inspection gauge 20 which is a simple inspection means.
  • the colored regions 22 are colored in the same hue, it is possible to easily discriminate even if there is a slight difference in saturation or brightness. Moreover, since the colors of the colored regions 22 are defined based on the three primary colors of RGB, the color patterns of the colored regions 22 are the same as a result of excellent reproducibility and the ability to adjust the color of each colored region 22 with high accuracy. It is possible to accurately form a plurality of inspection gauges.
  • the present invention is useful for a liquid crystal display panel inspection method and inspection gauge.

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Liquid Crystal (AREA)

Abstract

A method for inspecting a liquid crystal display panel comprises a step for overlapping an inspection gauge comprising a transparent base material and a plurality of colored regions formed on the transparent base material and colored differently from each other with a display region of the liquid crystal display panel, and a step for determining a display defect of the liquid crystal display panel by comparing the respective colored regions of the inspection gauge and the display color in the display region. As a result, the presence or absence of the display defect of the liquid crystal display panel is determined.

Description

液晶表示パネルの検査方法及び検査用ゲージLiquid crystal display panel inspection method and inspection gauge
　本発明は、液晶表示パネルの検査方法及び検査用ゲージに関するものである。 The present invention relates to a liquid crystal display panel inspection method and inspection gauge.
　液晶表示パネルは、複数の画素に薄膜トランジスタ（Thin-Film Transistor：以下、ＴＦＴと称する。）がそれぞれ形成されたＴＦＴ基板と、このＴＦＴ基板に対向して配置された対向基板と、これらＴＦＴ基板及び対向基板の間に設けられた液晶層とを有している。 The liquid crystal display panel includes a TFT substrate in which thin film transistors (hereinafter referred to as TFTs) are formed in a plurality of pixels, a counter substrate disposed to face the TFT substrate, the TFT substrate, And a liquid crystal layer provided between the counter substrates.
　ＴＦＴに電気的な故障や動作不良があると欠陥画素が発生する。例えば、ノーマリホワイトモードの液晶表示パネルにおいて、ある画素のＴＦＴにリーク電流不良があると、当該画素に所謂輝点欠陥が発生する。逆に、ある画素にＴＦＴに短絡不良があると、当該画素に所謂黒点欠陥が発生する。また、液晶表示パネには、表示の色調（色味）及び部分的な色ムラ等が生じる場合もあり、その程度が一定の許容限界を超えたものは表示欠陥とされる。 Defective pixels occur when there is an electrical failure or malfunction in the TFT. For example, in a normally white mode liquid crystal display panel, when there is a leakage current defect in a TFT of a certain pixel, a so-called bright spot defect occurs in the pixel. On the contrary, if a TFT has a short circuit defect in a certain pixel, a so-called black spot defect occurs in the pixel. In addition, the liquid crystal display panel may have a display color tone (color tone), partial color unevenness, and the like, and those whose degree exceeds a certain allowable limit are regarded as display defects.
　このような表示欠陥はアクティブマトリクス型液晶パネルの表示品位を著しく損なうので、通常製造段階で表示検査が行われる。 Such display defects significantly impair the display quality of the active matrix type liquid crystal panel, so display inspection is usually performed at the manufacturing stage.
　ところで、液晶表示パネルは、例えばＴＶ、プロジェクタ及びビデオカメラ用ビューファインダ等の用途に応じて表示欠陥の許容限界が異なる。したがって、表示欠陥を検査する場合には、液晶表示パネルの平面図である図４に示すように、各用途に応じて設定された許容限界の表示欠陥１１０を表示する限界見本１０１としての液晶表示パネルを取得し、その限界見本１０１と、検査対象の液晶表示パネル１０２とを、検査者の視覚により対比して検査が行われる。 By the way, liquid crystal display panels have different display defect tolerance limits depending on applications such as TVs, projectors, and video camera viewfinders. Therefore, when inspecting a display defect, as shown in FIG. 4 which is a plan view of a liquid crystal display panel, a liquid crystal display as a limit sample 101 for displaying a display defect 110 of an allowable limit set according to each application. The panel is acquired, and the limit sample 101 and the liquid crystal display panel 102 to be inspected are inspected by comparing with the inspector's vision.
　そして、検査対象の液晶表示パネル１０２における表示欠陥１２０の程度が、限界見本１０１における表示欠陥１１０の程度よりも低いと検査員に判断された場合には、当該検査対象の液晶表示パネル１０２は良品とされる。一方、検査対象の液晶表示パネル１０２における表示欠陥１２０の程度が、限界見本１０１における表示欠陥１１０の程度よりも高いと検査員に判断された場合には、当該検査対象の液晶表示パネル１０２は不良品とされる。 If the inspector determines that the degree of the display defect 120 in the liquid crystal display panel 102 to be inspected is lower than the degree of the display defect 110 in the limit sample 101, the liquid crystal display panel 102 to be inspected is a non-defective product. It is said. On the other hand, if the inspector determines that the degree of the display defect 120 in the liquid crystal display panel 102 to be inspected is higher than the degree of the display defect 110 in the limit sample 101, the liquid crystal display panel 102 to be inspected is not acceptable. It is considered a good product.
　しかし、上記限界見本は、表示欠陥が生じている現物を見本としたものであるため、液晶表示パネルの各用途に応じて、許容限界の表示欠陥を適切に表示した複数の限界見本を取得することは極めて難しい。よって、検査員の数だけ限界見本を用意することは難しく、手元に限界見本がない検査員は自己の記憶に基づいて検査せざるを得ない場合がある。 However, since the above limit sample is a sample in which a display defect has occurred, a plurality of limit samples that appropriately display the allowable limit display defect are obtained according to each application of the liquid crystal display panel. That is extremely difficult. Therefore, it is difficult to prepare limit samples as many as the number of inspectors, and inspectors who do not have limit samples at hand may have to inspect based on their own memory.
　さらに、限界見本の液晶表示パネルは、その表示欠陥が不安定であることが多く、欠陥の程度が経時的に変化してしまうこともある。このため、検査の判断基準が変化することから、検査結果にばらつきが生じて検査精度が低下する問題がある。加えて、当該限界見本を他の用途の液晶表示パネルの検査に用いることはできない。 Furthermore, the limit sample liquid crystal display panel often has unstable display defects, and the degree of defects may change over time. For this reason, there is a problem in that the inspection criteria are changed, so that the inspection results vary and the inspection accuracy is lowered. In addition, the limit sample cannot be used for inspection of liquid crystal display panels for other uses.
　これに対し、特許文献１には、疑似欠陥発生装置によって、製品の液晶表示パネルの表示欠陥と同等の状態を電気信号により擬似的に作り出し、これを見本の液晶表示パネルに例示表示させることが開示されている。 On the other hand, in Patent Document 1, a pseudo defect generation device artificially creates a state equivalent to a display defect of a liquid crystal display panel of a product by an electric signal, and displays this on a sample liquid crystal display panel as an example. It is disclosed.
特開平６－２０１５１６号公報JP-A-6-201516
　しかし、上記特許文献１の検査方法では、検査のために上記疑似欠陥発生装置を用意した上で、当該装置を制御して見本の液晶表示パネルに疑似欠陥を表示させる必要があるため、検査のための装置及び制御が複雑である。 However, in the inspection method of Patent Document 1, it is necessary to prepare the pseudo defect generation device for inspection and control the device to display the pseudo defect on a sample liquid crystal display panel. The apparatus and control for this are complicated.
　また、限界見本としての液晶表示パネルは、検査時に点灯させる必要があるため、検査に電力を要してしまう問題もある。 Also, the liquid crystal display panel as a limit sample needs to be lit at the time of inspection, and thus there is a problem that electric power is required for the inspection.
　本発明は、斯かる諸点に鑑みてなされたものであり、その主たる目的とするところは、液晶表示パネルの表示欠陥を簡単な検査手段によって高精度に検査しようとすることにある。 The present invention has been made in view of such various points, and a main object thereof is to inspect a display defect of a liquid crystal display panel with a high accuracy by a simple inspection means.
　上記の目的を達成するために、本発明に係る液晶表示パネルの検査方法は、液晶表示パネルの表示欠陥を判別する液晶表示パネルの検査方法であって、透明な基材と該透明な基材に形成されて互いに異なる色味に着色された複数の着色領域とを有する検査用ゲージを、上記液晶表示パネルの表示領域に重ねるステップと、上記検査用ゲージの各着色領域と、上記表示領域における表示色とを比較することにより、上記液晶表示パネルの表示欠陥を判別するステップとを有することを特徴とする。 In order to achieve the above object, a liquid crystal display panel inspection method according to the present invention is a liquid crystal display panel inspection method for discriminating display defects of a liquid crystal display panel, comprising: a transparent substrate; and the transparent substrate An inspection gauge having a plurality of colored regions that are formed on the display region of the liquid crystal display panel, each colored region of the inspection gauge, and the display region And comparing the display color with each other to determine a display defect of the liquid crystal display panel.
　また、本発明に係る検査用ゲージは、液晶表示パネルの表示欠陥を判別するための検査用ゲージであって、透明な基材と、上記透明な基材に形成されて互いに異なる色味に着色された複数の着色領域とを備えていることを特徴とする。 The inspection gauge according to the present invention is an inspection gauge for discriminating a display defect of a liquid crystal display panel, and is formed on a transparent base material and the transparent base material and colored in different colors. And a plurality of colored regions.
　　　－作用－
　本発明に係る検査方法では、検査用ゲージを用いて液晶表示パネルの表示欠陥を判別する。すなわち、まず、液晶表示パネルの表示領域に検査用ゲージを重ねる。検査用ゲージは、透明な基材に、互いに異なる色味に着色された複数の着色領域が形成されている。そして、この検査用ゲージにおける各着色領域の色と、表示領域の色とを検査員が対比することにより、当該表示領域の表示欠陥を容易に判別することが可能になる。 -Action-
In the inspection method according to the present invention, the display defect of the liquid crystal display panel is determined using an inspection gauge. That is, first, an inspection gauge is overlaid on the display area of the liquid crystal display panel. In the inspection gauge, a plurality of colored regions colored in different colors are formed on a transparent substrate. Then, when the inspector compares the color of each colored area in the inspection gauge with the color of the display area, it is possible to easily determine the display defect of the display area.
　このとき、検査用ゲージの各着色領域が、互いに同じ色相の色に着色されていれば、微妙な彩度や明度の違いであっても容易に判別することができる。また、各着色領域の色をＲＧＢの３原色を基準に規定すれば、再現性に優れるため、各着色領域の色味を高精度に調整することができ、複数の着色領域の色パターンが同じである検査用ゲージを精度良く複数形成することが可能になる。 At this time, if the colored areas of the inspection gauge are colored in the same hue, it is possible to easily discriminate even if there is a slight difference in saturation or brightness. In addition, if the colors of each colored area are defined based on the three primary colors RGB, the reproducibility is excellent, so that the color of each colored area can be adjusted with high accuracy, and the color patterns of the plurality of colored areas are the same. It is possible to accurately form a plurality of inspection gauges.
　本発明によれば、透明な基材に形成されて互いに異なる色味に着色された複数の着色領域を有する検査用ゲージによって、液晶表示パネルの表示欠陥を判別するようにしたので、当該液晶表示パネルの表示欠陥を簡単な検査手段である検査用ゲージによって高精度に検査することができる。 According to the present invention, the display defect of the liquid crystal display panel is determined by the inspection gauge having a plurality of colored regions formed on the transparent substrate and colored in different colors. A panel display defect can be inspected with high accuracy by an inspection gauge which is a simple inspection means.
図１は、検査用ゲージが重ねられた液晶表示パネルを示す平面図である。FIG. 1 is a plan view showing a liquid crystal display panel on which inspection gauges are stacked. 図２は、検査用ゲージの外観を示す平面図である。FIG. 2 is a plan view showing the appearance of the inspection gauge. 図３は、検査用ゲージにおける各着色領域の色を規定する数値を示す表である。FIG. 3 is a table showing numerical values defining the color of each colored region in the inspection gauge. 図４は、従来の限界見本としての液晶表示パネルと、検査対象の液晶表示パネルとを示す平面図である。FIG. 4 is a plan view showing a liquid crystal display panel as a conventional limit sample and a liquid crystal display panel to be inspected.
　以下、本発明の実施形態を図面に基づいて詳細に説明する。尚、本発明は、以下の実施形態に限定されるものではない。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiment.
　《発明の実施形態１》
　図１～図３は、本発明の実施形態１を示している。 Embodiment 1 of the Invention
1 to 3 show Embodiment 1 of the present invention.
　図１は、検査用ゲージが重ねられた液晶表示パネルを示す平面図である。図２は、検査用ゲージの外観を示す平面図である。図３は、検査用ゲージにおける各着色領域の色を規定する数値を示す表である。 FIG. 1 is a plan view showing a liquid crystal display panel on which inspection gauges are stacked. FIG. 2 is a plan view showing the appearance of the inspection gauge. FIG. 3 is a table showing numerical values defining the color of each colored region in the inspection gauge.
　　（液晶表示パネル）
　液晶表示パネル１０は、図１に示すように、アクティブマトリクス基板としてのＴＦＴ基板１１と、ＴＦＴ基板１１に対向して配置された対向基板１２と、ＴＦＴ基板１１及び対向基板１２の間に設けられた液晶層（不図示）とを有する。 (LCD panel)
As shown in FIG. 1, the liquid crystal display panel 10 is provided between a TFT substrate 11 as an active matrix substrate, a counter substrate 12 disposed to face the TFT substrate 11, and the TFT substrate 11 and the counter substrate 12. Liquid crystal layer (not shown).
　また、液晶表示パネル１０は、表示領域３１と、その周囲に設けられた額縁状の非表示領域３２とを有している。表示領域３１には、マトリクス状に配置された複数の画素（不図示）が形成されている。 Further, the liquid crystal display panel 10 includes a display area 31 and a frame-like non-display area 32 provided around the display area 31. In the display area 31, a plurality of pixels (not shown) arranged in a matrix are formed.
　上記対向基板１２には、それぞれ図示省略のカラーフィルタ及び共通電極等が形成されている。また、液晶層は、上記ＴＦＴ基板１１と対向基板１２との間に設けられたシール部材（不図示）によって封止されている。 The counter substrate 12 is provided with a color filter, a common electrode, etc. (not shown). The liquid crystal layer is sealed by a sealing member (not shown) provided between the TFT substrate 11 and the counter substrate 12.
　一方、ＴＦＴ基板１１には、画素電極（不図示）と、この画素電極に接続されたＴＦＴ（不図示）とが各画素にそれぞれ形成されている。また、ＴＦＴ基板１１は、対向基板１２に対向しない端子領域１４を有し、この端子領域１４にドライバ回路１５及びＦＰＣ（flexible printed circuit)１６が実装されている。 On the other hand, on the TFT substrate 11, a pixel electrode (not shown) and a TFT (not shown) connected to the pixel electrode are formed in each pixel. The TFT substrate 11 has a terminal region 14 that does not face the counter substrate 12, and a driver circuit 15 and a flexible printed circuit (FPC) 16 are mounted on the terminal region 14.
　　（検査用ゲージ）
　検査用ゲージ２０は、図２に示すように、透明な基材としての透明フィルム２１と、この透明フィルム２１に形成されて互いに異なる色味に着色された複数の着色領域２２とを有している。そして、この検査用ゲージ２０は、液晶表示パネル１０の表示欠陥を判別するために用いられる。 (Inspection gauge)
As shown in FIG. 2, the inspection gauge 20 includes a transparent film 21 as a transparent substrate, and a plurality of colored regions 22 formed on the transparent film 21 and colored in different colors. Yes. The inspection gauge 20 is used to determine a display defect of the liquid crystal display panel 10.
　透明フィルム２１は、横長の長方形に形成された透明な樹脂フィルムによって構成されている。透明フィルム２１の樹脂材料としては、例えば、色印刷されたＯＨＰシートをパウチフィルムで挟み熱圧着したものを例示することができる。尚、検査用ゲージ２０を構成する透明な基材としては、透明フィルム２１以外にも、例えば透明なプラスチック基板やガラス基板等を適用することが可能である。 The transparent film 21 is composed of a transparent resin film formed in a horizontally long rectangle. As the resin material of the transparent film 21, for example, a color printed OHP sheet sandwiched between pouch films and thermocompression bonded can be exemplified. In addition to the transparent film 21, for example, a transparent plastic substrate, a glass substrate, or the like can be applied as the transparent base material constituting the inspection gauge 20.
　複数の着色領域２２は、透明フィルム２１の長さ方向（図２で左右方向）に所定の間隔で配置されている。本実施形態では、例えば５つの着色領域２２が形成され、各着色領域２２について図２で左から順にＡ～Ｅという識別記号が透明フィルム２１に記載されている。 The plurality of colored regions 22 are arranged at predetermined intervals in the length direction of the transparent film 21 (left-right direction in FIG. 2). In the present embodiment, for example, five colored regions 22 are formed, and identification symbols A to E are written on the transparent film 21 in order from the left in FIG.
　各着色領域２２は、互いに同じ色相の色に着色されている。例えば、各着色領域２２は黄色に着色されている。一方、各着色領域２２は、彩度及び明度の少なくとも一方が互いに異なるように着色されている。そして、各着色領域２２の色味は、当該着色領域２２が並ぶ方向へ順に、各着色領域２２毎に徐々に変化するように規定されている。 The colored regions 22 are colored in the same hue. For example, each colored region 22 is colored yellow. On the other hand, the colored regions 22 are colored so that at least one of saturation and brightness is different from each other. And the color of each coloring area | region 22 is prescribed | regulated so that it may change gradually for every coloring area | region 22 in order in the direction where the said coloring area | region 22 is located in a line.
　より具体的には、各着色領域２２の色は、ＲＧＢの３原色を基準に規定されている。すなわち、図３に示すように、Ｒ，Ｇ，Ｂの各色は、０～２５５の数値によって規定されている。例えばＲの数値が０から２５５へ徐々に大きくなると、Ｒの色は、黒から明るい赤に変化する。同様に、Ｇの色は黒から明るい緑に変化し、Ｂの色は黒から明るい青に変化する。 More specifically, the color of each colored region 22 is defined based on the three primary colors RGB. That is, as shown in FIG. 3, each color of R, G, and B is defined by numerical values of 0 to 255. For example, when the numerical value of R gradually increases from 0 to 255, the color of R changes from black to bright red. Similarly, the color G changes from black to light green and the color B changes from black to light blue.
　そして、Ａ～Ｅの各着色領域２２は、図３に示すように、Ｒがそれぞれ２５５で一定値であると共に、Ｇがそれぞれ２５０で一定値に規定されている。一方、Ａ～Ｅの各着色領域２２のＢは、Ａが２３９であり、Ｂが２２９であり、Ｃが２１９であり、Ｄが２０９であり、Ｅが１９９にそれぞれ規定されている。このことにより、Ａ～Ｅの各着色領域２２は、左側のＡから右側のＥへ配置される順に、淡い黄色から徐々に強い色調の黄色に変化するように着色されている。 Further, as shown in FIG. 3, each colored region 22 of A to E has a constant value of R of 255 and a constant value of 250 of G, respectively. On the other hand, B of each colored region 22 of A to E is defined as A is 239, B is 229, C is 219, D is 209, and E is 199. As a result, the colored regions 22 of A to E are colored so as to gradually change from light yellow to yellow having a strong color tone in the order of arrangement from the left A to the right E.
　上記Ａ～Ｅの各着色領域２２は、例えば、インクジェット印刷法やレーザー印刷法などによって形成することが可能である。 The colored regions 22 of A to E can be formed by, for example, an ink jet printing method or a laser printing method.
　　－検査方法－
　次に、上記液晶表示パネル１０の検査方法について説明する。 -Inspection method-
Next, an inspection method for the liquid crystal display panel 10 will be described.
　当該検査方法は、液晶表示パネル１０の製造工程において行われる。液晶表示パネル１０は、ＴＦＴ基板１１と対向基板１２とを液晶材料及びシール部材を介して貼り合わせることによって製造する。 The inspection method is performed in the manufacturing process of the liquid crystal display panel 10. The liquid crystal display panel 10 is manufactured by bonding the TFT substrate 11 and the counter substrate 12 through a liquid crystal material and a seal member.
　そうして、上記液晶表示パネル１０に検査信号を入力して検査用画像を表示領域３１に表示させ、その表示の色調（色味）や色ムラ等の表示欠陥を判別する。例えば、表示領域３１の全体において所定の色味の黄色（基準色）を表示させるように、検査信号を液晶表示パネル１０に入力する。 Then, an inspection signal is input to the liquid crystal display panel 10 to display an inspection image in the display area 31, and display defects such as color tone (color tone) and color unevenness of the display are determined. For example, an inspection signal is input to the liquid crystal display panel 10 so that yellow (reference color) with a predetermined color is displayed in the entire display area 31.
　次に、検査用ゲージ２０を、図１に示すように、液晶表示パネル１０の表示領域３１に重ねる。そうして、検査用ゲージ２０の各着色領域２２と、表示領域３１における表示色（上記所定の黄色）とを直接に検査員が比較する。 Next, the inspection gauge 20 is overlaid on the display area 31 of the liquid crystal display panel 10 as shown in FIG. Then, the inspector directly compares each colored area 22 of the inspection gauge 20 and the display color (the predetermined yellow color) in the display area 31.
　例えば、表示領域３１全体及び色ムラの色味が、Ａ～Ｃの着色領域２２の色味の範囲内であれば、表示欠陥が無く当該液晶表示パネル１０は良品であると判断する。一方、表示領域３１全体及び色ムラの色味が、上記範囲外の色味であれば、表示欠陥があり当該液晶表示パネル１０が不良品であると判断する。 For example, if the entire display area 31 and the color unevenness are within the color range of the colored areas 22 of A to C, it is determined that there is no display defect and the liquid crystal display panel 10 is a good product. On the other hand, if the entire display area 31 and the color unevenness are out of the above range, it is determined that there is a display defect and the liquid crystal display panel 10 is defective.
　図１では、液晶表示パネル１０がＢの着色領域２２と同じ色味を表示するように、当該液晶表示パネル１０に検査信号を入力している。ところが、この表示領域３１の一部では、Ｄの着色領域２２と同程度の色味の色ムラが表示されており、上記Ａ～Ｃの範囲を超えているため、表示欠陥があるものと判断される。 In FIG. 1, an inspection signal is input to the liquid crystal display panel 10 so that the liquid crystal display panel 10 displays the same color as the colored region 22 of B. However, in this part of the display area 31, color unevenness having the same color as that of the D colored area 22 is displayed and exceeds the range of A to C, so that it is determined that there is a display defect. Is done.
　また、表示領域３１全体及び色ムラの色味が、例えばＤの着色領域２２の色味以上であれば表示欠陥が無く、Ｄの着色領域２２の色味未満であれば表示欠陥が有ると判断するようにしてもよい。 Further, for example, if the color of the entire display region 31 and the color unevenness is equal to or greater than the color of the D colored region 22, for example, there is no display defect, and if it is less than the color of the D colored region 22, it is determined that there is a display defect. You may make it do.
　　－実施形態１の効果－
　したがって、この実施形態１によると、透明フィルム２１に形成されて互いに異なる色味に着色された複数の着色領域２２を有する検査用ゲージ２０によって、液晶表示パネル１０の表示欠陥を判別するようにしたので、検査員が表示領域３１に重ねられた検査用ゲージ２０の着色領域２２の色味と、表示領域３１の表示の色味とを直接に対比することができめ、当該液晶表示パネル１０の表示欠陥を簡単な検査手段である検査用ゲージ２０によって高精度に検査することができる。 -Effect of Embodiment 1-
Therefore, according to the first embodiment, the display defect of the liquid crystal display panel 10 is determined by the inspection gauge 20 that is formed on the transparent film 21 and has a plurality of colored regions 22 that are colored in different colors. Therefore, the inspector can directly compare the color of the colored region 22 of the inspection gauge 20 superimposed on the display region 31 with the color of the display in the display region 31, so that the liquid crystal display panel 10 can be compared. Display defects can be inspected with high accuracy by the inspection gauge 20 which is a simple inspection means.
　さらに、各着色領域２２を互いに同じ色相の色に着色したので、微妙な彩度や明度の違いであっても容易に判別することができる。しかも、各着色領域２２の色をＲＧＢの３原色を基準に規定したので、再現性に優れると共に各着色領域２２の色味を高精度に調整できる結果、複数の着色領域２２の色パターンが同じである検査用ゲージを精度良く複数形成することができる。 Furthermore, since the colored regions 22 are colored in the same hue, it is possible to easily discriminate even if there is a slight difference in saturation or brightness. Moreover, since the colors of the colored regions 22 are defined based on the three primary colors of RGB, the color patterns of the colored regions 22 are the same as a result of excellent reproducibility and the ability to adjust the color of each colored region 22 with high accuracy. It is possible to accurately form a plurality of inspection gauges.
　以上説明したように、本発明は、液晶表示パネルの検査方法及び検査用ゲージについて有用である。 As described above, the present invention is useful for a liquid crystal display panel inspection method and inspection gauge.
　　　　　１０　　　液晶表示パネル 
　　　　　２０　　　検査用ゲージ 
　　　　　２１　　　透明フィルム（透明な基材） 
　　　　　２２　　　着色領域 
　　　　　３１　　　表示領域 　　 10 Liquid crystal display panel
20 Inspection gauge
21 Transparent film (transparent substrate)
22 Coloring area
31 display area

Claims (6)

  1. 　液晶表示パネルの表示欠陥を判別する液晶表示パネルの検査方法であって、
    　透明な基材と該透明な基材に形成されて互いに異なる色味に着色された複数の着色領域とを有する検査用ゲージを、上記液晶表示パネルの表示領域に重ねるステップと、
    　上記検査用ゲージの各着色領域と、上記表示領域における表示色とを比較することにより、上記液晶表示パネルの表示欠陥を判別するステップとを有する
    ことを特徴とする液晶表示パネルの検査方法。     A method for inspecting a liquid crystal display panel for determining a display defect of a liquid crystal display panel,
    Superimposing an inspection gauge having a transparent substrate and a plurality of colored regions formed on the transparent substrate and colored in different colors on the display region of the liquid crystal display panel;
    A method of inspecting a liquid crystal display panel, comprising the step of discriminating a display defect of the liquid crystal display panel by comparing each colored region of the inspection gauge with a display color in the display region.
  2. 　請求項１に記載された液晶表示パネルの検査方法において、
    　上記検査用ゲージの各着色領域は、互いに同じ色相の色に着色されている
    ことを特徴とする液晶表示パネルの検査方法。     In the inspection method of the liquid crystal display panel according to claim 1,
    A method for inspecting a liquid crystal display panel, wherein the colored regions of the inspection gauge are colored in the same hue.
  3. 　請求項１又は２に記載された液晶表示パネルの検査方法において、
    　上記検査用ゲージにおける各着色領域の色は、ＲＧＢの３原色を基準に規定されている
    ことを特徴とする液晶表示パネルの検査方法。     In the inspection method of the liquid crystal display panel according to claim 1 or 2,
    A method for inspecting a liquid crystal display panel, wherein the color of each colored region in the inspection gauge is defined based on the three primary colors RGB.
  4. 　液晶表示パネルの表示欠陥を判別するための検査用ゲージであって、
    　透明な基材と、
    　上記透明な基材に形成されて互いに異なる色味に着色された複数の着色領域とを備えている
    ことを特徴とする検査用ゲージ。     An inspection gauge for determining a display defect of a liquid crystal display panel,
    A transparent substrate,
    An inspection gauge comprising: a plurality of colored regions formed on the transparent substrate and colored in different colors.
  5. 　請求項４に記載された検査用ゲージにおいて、
    　上記各着色領域は、互いに同じ色相の色に着色されている
    ことを特徴とする検査用ゲージ。     The inspection gauge according to claim 4,
    Each of the colored areas is colored with the same hue as each other.
  6. 　請求項４又は５に記載された検査用ゲージにおいて、
    　上記各着色領域の色は、ＲＧＢの３原色を基準に規定されている
    ことを特徴とする検査用ゲージ。     The inspection gauge according to claim 4 or 5,
    An inspection gauge characterized in that the color of each colored region is defined based on the three primary colors of RGB.
PCT/JP2011/000760 2010-04-15 2011-02-10 Method for inspecting liquid crystal display panel, and inspection gauge WO2011129042A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010094126 2010-04-15
JP2010-094126 2010-04-15

Publications (1)

Publication Number Publication Date
WO2011129042A1 true WO2011129042A1 (en) 2011-10-20

Family

ID=44798432

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/000760 WO2011129042A1 (en) 2010-04-15 2011-02-10 Method for inspecting liquid crystal display panel, and inspection gauge

Country Status (1)

Country Link
WO (1) WO2011129042A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0736174U (en) * 1993-12-14 1995-07-04 バンコ株式会社 Print density sample sheet and sample book
JP2004132976A (en) * 2002-09-19 2004-04-30 Toshiba Matsushita Display Technology Co Ltd Manufacturing method of optical device and testing device for defective determination for this
JP2004219229A (en) * 2003-01-14 2004-08-05 Mimoto Gosei Jushi Kk Color specification method, and color specification column structure and color chart using the same
JP2008241254A (en) * 2007-03-23 2008-10-09 Toshiba Matsushita Display Technology Co Ltd Lighting inspection method, and method for manufacturing plane display device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0736174U (en) * 1993-12-14 1995-07-04 バンコ株式会社 Print density sample sheet and sample book
JP2004132976A (en) * 2002-09-19 2004-04-30 Toshiba Matsushita Display Technology Co Ltd Manufacturing method of optical device and testing device for defective determination for this
JP2004219229A (en) * 2003-01-14 2004-08-05 Mimoto Gosei Jushi Kk Color specification method, and color specification column structure and color chart using the same
JP2008241254A (en) * 2007-03-23 2008-10-09 Toshiba Matsushita Display Technology Co Ltd Lighting inspection method, and method for manufacturing plane display device

Similar Documents

Publication Publication Date Title
US10690974B2 (en) Liquid crystal display device
JP4869807B2 (en) Display device
US8249330B2 (en) System and method for testing a liquid crystal panel
US9091879B2 (en) Liquid crystal display panel and liquid crystal display apparatus
US20180203303A1 (en) Detection unit, array structure, liquid crystal display device and detection method
JP3190238B2 (en) Active matrix liquid crystal panel defect detection method
US8094256B2 (en) Active matrix substrate, a liquid crystal panel, a display device, a television receiver, and methods of correcting and producing the substrate and panel
JP2008026752A (en) Color filter substrate, method for correcting color filter substrate, and color liquid crystal display device
WO2016082236A1 (en) Thin-film transistor array substrate and liquid crystal display apparatus
CN108873404A (en) The method for measuring display panel brightness
US7248313B2 (en) Color filter and liquid crystal display device using the same
WO2010146745A1 (en) Method for inspecting display panel, and method for producing display device
WO2011129042A1 (en) Method for inspecting liquid crystal display panel, and inspection gauge
JP2008216810A (en) Liquid crystal panel inspecting device and liquid crystal panel inspection method
CN115167021A (en) Detection method and detection device for display panel
JP3210234B2 (en) Liquid crystal display panel manufacturing method
KR102037053B1 (en) Display panel
CN109003566B (en) Detection device and detection method for display panel
JP3235618B2 (en) Liquid crystal display panel manufacturing method
US20110102699A1 (en) Liquid crystal display and repair method thereof
JPH0755719A (en) Inspecting apparatus and inspecting method for liquid crystal display device and manufacture thereof
JP4160173B2 (en) Plane display device simulation method, simulation device, inspection method, and inspection device
KR20190047544A (en) Etching method for liquid crystal panel
JP2007004019A (en) Inspection method of electrooptical apparatus and manufacturing method of electrooptical apparatus
CN114690475A (en) Color filter substrate, liquid crystal box and manufacturing method thereof

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11768569

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11768569

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP