Optical detection device and method for detecting detection component using the same

Abstract

An optical detection device and a method for detecting a detection member using the same are disclosed, wherein the optical detection device may include an optical member, a first polarization member, an integrating sphere, and a second polarization member, wherein: the optical member is located on the bottom surface of the detection member and emits light; the first polarization member is located between the optical member and the detection member; the integrating sphere is located above the detection member, includes a first opening and a second opening, and collects light; and the second polarization member is arranged to overlap with the first opening of the integrating sphere. Therefore, a photometric distribution curve diagram can be used to accurately judge the defects of the detection member without analyzing the defects of the detection member with the naked eye.

Description

Technical Field

[0001] The present invention relates to an optical detection device and a method of detecting a detection member using the same. More specifically, the present invention relates to an optical detection device including a polarization member and a method of detecting a detection member using the optical detection device including the polarization member. Background Art

[0002] Flat panel display devices are used as display devices replacing cathode ray tube display devices due to characteristics such as light weight and thinness, etc. Representative examples of such flat panel display devices are liquid crystal display devices and organic light emitting display devices.

[0003] In the process of detecting defects of the display device, after all the constituent elements included in the display device are formed on a substrate (for example, in the case of a liquid crystal display device, including a polarizing plate and a backlight unit), the process of detecting defects of the display device may be performed. For example, the process of detecting defects of the display device may include a method of transmitting light through the display device and a method of causing light to be reflected by the display device.

[0004] In the case of performing the above detection process, a light source capable of emitting light and a camera for capturing light may be positioned around the display device. Here, in the method of transmitting light in the above detection process, the light source may be positioned on the bottom surface of the display device, and in the method of reflecting light in the above detection process, the light source may be positioned on the upper surface of the display device.

[0005] For example, in a detection process for detecting defects of a display device by reflecting light, light may be emitted from a light source in a direction orthogonal to the upper surface of the display device, and the light may be specularly reflected (or diffusely reflected) by a component included in the display device after being transmitted through the upper surface of the display device and incident on the inside of the display device. After the reflected light is transmitted through the upper surface of the display device and emitted to the outside of the display device, the light may be incident on a camera. In this case, in order to capture the light emitted to the outside, a camera may be repeatedly photographed multiple times at a predetermined angle (e.g., an angle inclined relative to the upper surface of the display device), or a plurality of cameras may be arranged at a plurality of angles for photographing (e.g., photographing defects of the display device at a specific angle). In addition, even when the light emitted from the light source is incident at a slightly inclined angle relative to the upper surface to detect defects of the display device, detection may be performed. Therefore, defects of the display device may be detected by analyzing the image captured by the camera with the naked eye.

[0006] In this case, since the inspection time becomes relatively long and the captured image is analyzed with the naked eye, it is difficult to find defects in the display device. In addition, in the case of a liquid crystal display device, since the inspection is performed in a state where the polarizing plate and the backlight unit are attached, if the liquid crystal display device is judged to be defective, the polarizing plate and the backlight unit are also discarded together, so the cost loss is large. Summary of the invention

[0007] Technical issues solved

[0008] An object of the present invention is to provide an optical detection device including a polarization member.

[0009] Another object of the present invention is to provide a method for detecting a detection member using an optical detection device including a polarization member.

[0010] However, the present invention is not limited to the above-mentioned objects, and various extensions may be made without departing from the idea and scope of the present invention.

[0011] Workaround

[0012] In order to achieve one of the aforementioned purposes of the present invention, an optical detection device according to an exemplary embodiment of the present invention may include an optical component, a first polarization component, an integrating sphere and a second polarization component, wherein: the optical component is located on the bottom surface of the detection component and emits light; the first polarization component is located between the optical component and the detection component; the integrating sphere is located above the detection component, includes a first opening and a second opening, and collects light; and the second polarization component is arranged to overlap with the first opening of the integrating sphere.

[0013] In exemplary embodiments, the first polarization member and the second polarization member may include linear polarization plates.

[0014] In an exemplary embodiment, a first polarization axis of the first polarization member and a second polarization axis of the second polarization member may be orthogonal.

[0015] In exemplary embodiments, the first polarization member may include a first polarization axis extending in a first direction.

[0016] In an exemplary embodiment, the second polarization member may include a second polarization axis extending in a second direction orthogonal to the first direction.

[0017] In an exemplary embodiment, in the case where light emitted from the optical member passes through the first polarization member, the first polarization member may selectively transmit light polarized in a direction parallel to the first polarization axis.

[0018] In an exemplary embodiment, polarized light that has passed through the first polarization member may be transmitted through the detection member.

[0019] In an exemplary embodiment, in the case where light transmitted through the detection member passes through the second polarization member, the second polarization member may selectively transmit light polarized in a direction parallel to the second polarization axis.

[0020] In an exemplary embodiment, the first polarization axis may be orthogonal to the second polarization axis.

[0021] In exemplary embodiments, the first polarization member may be opposite to the second polarization member.

[0022] In an exemplary embodiment, the optical detection device may further include a sensing member arranged to overlap with the second opening of the integrating sphere.

[0023] In an exemplary embodiment, the optical member may include a surface light source, and the sensing member may include one of a spectrometer, a photo detector, and a photo sensor.

[0024] In order to achieve the aforementioned other purpose of the present invention, a method for detecting a detection member using an optical detection device according to an exemplary embodiment of the present invention may include: a step of providing an optical detection device including a first structure and a second structure, wherein the first structure is located on the bottom surface of the detection member and includes an optical member and a first polarization member, and the second structure is located on the upper surface of the detection member and includes a second polarization member, an integrating sphere, and a sensing member; and a step of causing a portion of the light passing through the detection member to be incident on the second structure after emitting light from the first structure and allowing the light to pass through the detection member.

[0025] In an exemplary embodiment, the method may further include: generating a first luminosity distribution graph through a sensing member based on light incident to the second structure; and comparing the luminosity distribution graph of a detection member without defects with the first luminosity distribution graph.

[0026] In an exemplary embodiment, the above method may further include: a step of changing the position of the optical detection device; a step of generating a second photometric distribution curve diagram of the detection member at the changed position; and a step of comparing the photometric distribution curve diagram of the detection member without defects with the second photometric distribution curve diagram.

[0027] In an exemplary embodiment, the optical member may include a surface light source, and the sensing member may include one of a spectrometer, a photodetector, and a photoelectric sensor.

[0028] In an exemplary embodiment, in the case where light emitted from the optical member passes through the first polarization member, the first polarization member may selectively transmit light polarized in a direction parallel to a first polarization axis of the first polarization member.

[0029] In an exemplary embodiment, polarized light that has passed through the first polarization member may be transmitted through the detection member.

[0030] In an exemplary embodiment, in the case where light transmitted through the detection member passes through the second polarization member, the second polarization member may selectively transmit light polarized in a direction parallel to the second polarization axis of the second polarization member.

[0031] In an exemplary embodiment, the first polarization axis may be orthogonal to the second polarization axis.

[0032] Beneficial Effects

[0033] The optical detection device according to an exemplary embodiment of the present invention can transmit light through the detection member and measure the photometric distribution curve of the light collected in the integrating sphere. In the case where a photometric distribution curve different from the photometric distribution curve of the normal detection member is measured, the detection member can be judged to be defective. Therefore, the above-mentioned photometric distribution curve can be used to accurately judge the defect of the detection member without analyzing the defect of the detection member with the naked eye.

[0034] In the method for inspecting the inspection member using the optical inspection device according to the exemplary embodiment of the present invention, defect inspection can be performed before the polarizing plate and the backlight unit are attached to the inspection member, so even if a defect of the inspection member occurs, the polarizing plate and the backlight unit are not discarded together. Thus, the manufacturing cost can be relatively reduced.

[0035] In addition, the defects of the detection member can be determined by the above-mentioned luminance distribution curve diagram, so the above-mentioned luminance distribution curve diagram can be used to accurately judge the defects of the detection member without analyzing the defects of the detection member with the naked eye. As a result, the time for using the optical detection device to detect the detection member can also be relatively reduced, and tiny defects that cannot be distinguished by the naked eye can also be found.

[0036] However, the effects of the present invention are not limited to the above-mentioned effects, and various extensions will be possible within the scope not departing from the idea and field of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a block diagram illustrating an optical detection apparatus according to an exemplary embodiment of the present invention.

[0038] Figure 2 It is shown Figure 1 Cross-sectional view of an optical detection device.

[0039] Figure 3 It is used to describe the Figure 1 A stereoscopic view of an integrating sphere in an optical detection device.

[0040] Figure 4 It is used to describe the Figure 1 A plan view of a polarization member in an optical detection device.

[0041] Figure 5 It is enlarged to show Figure 2 A partial enlarged cross-sectional view of the "A" area.

[0042] Figure 6 and Figure 7 It is a perspective view for describing light transmitted through a detection member.

[0043] Figure 8 and Fig. 9 It is a simulated image of light transmitted through the detection member so as to be displayed on the detection member.

[0044] Fig.10 It is a luminous intensity distribution curve image of the light incident on the integrating sphere among the light transmitted through the detection member.

[0045] Fig.11 is included from Figure 1 A luminosity distribution curve graph generated by a sensing component in an optical detection device.

[0046] Figures 12 to 15 It is a perspective view showing a method of detecting a detection member using an optical detection device.

[0047] Description of Reference Numerals

[0048] 100: Optical detection device 110: Lower substrate

[0049] 130: Active layer 150: Gate insulating layer

[0050] 170: Gate electrode 190: Interlayer insulating layer

[0051] 200: Light emitting structure 210: Source electrode

[0052] 230: Drain electrode 250: Semiconductor element

[0053] 290: Pixel electrode 300: Detection member

[0054] 310: Lower alignment film 315: Upper alignment film

[0055] 330: Liquid crystal layer 340: Common electrode

[0056] 350: Color filter 370: Black matrix

[0057] 410: Upper substrate 430: Spacer

[0058] 510: first polarization component 520: second polarization component

[0059] 530: Integrating sphere 550: Sensing component

[0060] 570: Optical member 600: Second structure

[0061] 700: First structure DETAILED DESCRIPTION

[0062] Hereinafter, an optical detection device and a method of detecting a detection member using the optical detection device according to exemplary embodiments of the present invention are described in detail with reference to the accompanying drawings. In the drawings, the same or similar reference numerals are used for the same or similar components.

[0063] Figure 1 is a block diagram showing an optical detection device according to an exemplary embodiment of the present invention, and Figure 2 It is shown Figure 1 Cross-sectional view of an optical detection device. Figure 3 It is used to describe the Figure 1 A stereogram of an integrating sphere in an optical detection device, and Figure 4 It is used to describe the Figure 1 A plan view of a polarization member in an optical detection device. Figure 5 It is enlarged to show Figure 2 A partial enlarged cross-sectional view of the "A" area.

[0064] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the optical detection device 100 may include a first structure body 700 and a second structure body 600, and the first structure body 700 and the second structure body 600 may be positioned to be spaced apart from each other. Here, the first structure body 700 may include an optical member 570 and a first polarization member 510, and the second structure body 600 may include a second polarization member 520, an integrating sphere 530, and a sensing member 550. In order to detect defects of the detection member 300, the detection member 300 may be located between the first structure body 700 and the second structure body 600.

[0065] A detection member 300 may be provided. The detection member 300 may extend in a first direction D1 and a second direction D2 orthogonal to the first direction D1 (or a third direction D3 opposite to the first direction D1 and the second direction D2), and may substantially have a plate shape. For example, the detection member 300 may include a liquid crystal display device. In an exemplary embodiment, the liquid crystal display device does not include a polarizing plate and a backlight unit. In other words, the process of detecting a defect of the detection member 300 using the optical detection device 100 may be performed without assembling the polarizing plate and the backlight unit in the liquid crystal display device, and when performing the above-mentioned detection using the optical detection device 100 without the defect of the liquid crystal display device, the polarizing plate and the backlight unit may be assembled in the liquid crystal display device.

[0066] For example, Figure 5 As shown, the detection member 300 may include a lower substrate 110, a semiconductor element 250, a light emitting structure 200, a spacer 430, a lower orientation film 310, an upper orientation film 315, a coating layer 390, a black matrix 370, a color filter 350, an upper substrate 410, etc. Here, the semiconductor element 250 may include a gate electrode 170, a gate insulating layer 150, an active layer 130, an interlayer insulating layer 190, a source electrode 210, and a drain electrode 230. The light emitting structure 200 may include a pixel electrode 290, a liquid crystal layer 330, and a common electrode 340.

[0067] The lower substrate 110 including a transparent material may be provided. The lower substrate 110 may include a quartz substrate, a synthetic quartz substrate, a calcium fluoride substrate, an F-doped quartz substrate, a sodalime glass substrate, a non-alkali glass substrate, or the like.

[0068] The gate electrode 170 may be disposed on the lower substrate 110. In other words, the gate electrode 170 may be disposed below the active layer 130. The gate electrode 170 may include a metal, an alloy, a metal nitride, a conductive metal oxide, a transparent conductive substance, or the like. For example, the gate electrode 170 may include gold (Au), silver (Ag), aluminum (Al), platinum (Pt), nickel (Ni), titanium (Ti), palladium (Pd), magnesium (Mg), calcium (Ca), lithium (Li), chromium (Cr), tantalum (Ta), tungsten (W), copper (Cu), molybdenum (Mo), scandium (Sc), neodymium (Nd), iridium (Ir), alloys containing aluminum, aluminum nitride (AlN), alloys containing silver, tungsten nitride (WN), alloys containing copper, alloys containing molybdenum, titanium nitride (TiN), chromium nitride (CrN), tantalum nitride (TaN), strontium ruthenium oxide (SrRuO), zinc oxide (ZnO), indium tin oxide (ITO), tin oxide (SnO), indium oxide (InO), gallium oxide (GaO), indium zinc oxide (IZO), etc. These substances may be used alone or in combination with each other. In other exemplary embodiments, the gate electrode 170 may also have a multilayer structure including a plurality of metal layers. For example, the above-mentioned metal layers may have thicknesses different from each other, or may include substances different from each other.

[0069] A gate insulating layer 150 may be arranged on the lower substrate 110 and the gate electrode 170. The gate insulating layer 150 may cover the gate electrode 170 on the lower substrate 110 and be arranged on the entire lower substrate 110. For example, the gate insulating layer 150 may fully cover the gate electrode 170 on the lower substrate 110 and may substantially have a flat upper surface without generating a step difference around the gate electrode 170. Alternatively, the gate insulating layer 150 may also cover the gate electrode 170 on the lower substrate 110 and be arranged along the contour of the gate electrode 170 with a uniform thickness. The gate insulating layer 150 may include a silicon compound, a metal oxide, and the like. For example, the gate insulating layer 150 may include silicon oxide (SiO), silicon nitride (SiN), silicon oxynitride (SiON), silicon oxycarbide (SiOC), silicon carbon nitride (SiCN), aluminum oxide (AlO), aluminum nitride (AlN), tantalum oxide (TaO), hafnium oxide (HfO), zirconium oxide (ZrO), titanium oxide (TiO), etc. In other exemplary embodiments, the gate insulating layer 150 may also have a multilayer structure including a plurality of insulating layers. For example, the above insulating layers may have different thicknesses from each other, or may include different substances from each other.

[0070] The active layer 130 may be disposed on the gate insulating layer 150. In other words, the active layer 130 may be disposed on a portion of the gate insulating layer 150 under which the gate electrode 170 is disposed. The active layer 130 may include a metal oxide semiconductor, an inorganic semiconductor (e.g., amorphous silicon and polysilicon), an organic semiconductor, or the like.

[0071] The source electrode 210 may be arranged on the gate insulating layer 150 and the first portion of the active layer 130. In other words, the source electrode 210 may be in contact with the first portion of the active layer 130. The source electrode 210 may include a metal, an alloy, a metal nitride, a conductive metal oxide, a transparent conductive substance, etc. These substances may be used alone or in combination with each other. In other exemplary embodiments, the source electrode 210 may also have a multilayer structure including a plurality of metal layers. For example, the metal layers may have different thicknesses from each other, or may include different substances from each other.

[0072] A drain electrode 230 may be arranged on the gate insulating layer 150 and the second portion of the active layer 130. In other words, the drain electrode 230 may be in contact with the above-mentioned second portion of the active layer 130. The drain electrode 230 may include a metal, an alloy, a metal nitride, a conductive metal oxide, a transparent conductive substance, etc. These substances may be used alone or in combination with each other. In other exemplary embodiments, the drain electrode 230 may also have a multilayer structure including a plurality of metal layers. For example, the above-mentioned metal layers may have different thicknesses from each other, or may include different substances from each other.

[0073] An interlayer insulating layer 190 may be arranged on the gate insulating layer 150, the source electrode 210, the drain electrode 230, and the active layer 130. The interlayer insulating layer 190 may cover the source electrode 210, the drain electrode 230, and the active layer 130 on the gate insulating layer 150, and be arranged on the entire gate insulating layer 150. For example, the interlayer insulating layer 190 may fully cover the source electrode 210, the drain electrode 230, and the active layer 130 on the gate insulating layer 150, and may substantially have a flat upper surface without generating a step difference portion around the source electrode 210, the drain electrode 230, and the active layer 130. Optionally, the interlayer insulating layer 190 may also cover the source electrode 210, the drain electrode 230, and the active layer 130 on the gate insulating layer 150, and be arranged along the contours of the source electrode 210, the drain electrode 230, and the active layer 130 with a uniform thickness. The interlayer insulating layer 190 may include a silicon compound, a metal oxide, and the like. In other exemplary embodiments, the interlayer insulating layer 190 may also have a multi-layer structure including a plurality of insulating layers. For example, the insulating layers may have different thicknesses from each other, or may include different materials from each other.

[0074] Thus, the semiconductor element 250 including the gate electrode 170 , the gate insulating layer 150 , the active layer 130 , the interlayer insulating layer 190 , the source electrode 210 , and the drain electrode 230 may be arranged.

[0075] However, although the detection member 300 is described as having a configuration including one transistor (eg, semiconductor element 250), the configuration of the present invention is not limited thereto. For example, the detection member 300 may also have a configuration including a plurality of transistors and a plurality of capacitors.

[0076] A pixel electrode 290 may be arranged on the interlayer insulating layer 190. The pixel electrode 290 may contact the drain electrode 230 through a contact hole, which is formed by removing a portion of the interlayer insulating layer 190. That is, the pixel electrode 290 may be electrically connected to the semiconductor element 250. The pixel electrode 290 may include a metal, an alloy, a metal nitride, a conductive metal oxide, a transparent conductive substance, etc. These substances may be used alone or in combination with each other. Optionally, the pixel electrode 290 may also have a multilayer structure including a plurality of metal layers. For example, the above-mentioned metal layers may have thicknesses different from each other, or may include substances different from each other.

[0077] A lower alignment film 310 may be arranged on the interlayer insulating layer 190 and the pixel electrode 290. The lower alignment film 310 may cover the pixel electrode 290 on the interlayer insulating layer 190. For example, the lower alignment film 310 may fully cover the pixel electrode 290 on the interlayer insulating layer 190, and may have a substantially flat upper surface without generating a step difference around the pixel electrode 290. Alternatively, the lower alignment film 310 may also cover the pixel electrode 290 on the interlayer insulating layer 190, and be arranged along the contour of the pixel electrode 290 with a uniform thickness. The lower alignment film 310 may include an inorganic insulating substance or an organic insulating substance. In an exemplary embodiment, the lower alignment film 310 may include polyamic acid, polysiloxane, polyimide, and the like.

[0078] A liquid crystal layer 330 may be disposed in a display region (not shown) on the lower alignment film 310. The liquid crystal layer 330 may include liquid crystal molecules having optical anisotropy. The liquid crystal molecules may be driven by an electric field generated from the pixel electrode 290 and the common electrode 340 to transmit or block light passing through the liquid crystal layer 330, thereby displaying an image.

[0079] An upper alignment film 315 may be disposed on the liquid crystal layer 330. The upper alignment film 315 may cover the liquid crystal layer 330. For example, the upper alignment film 315 may fully cover the liquid crystal layer 330 and may have a substantially flat upper surface without generating a step difference around the liquid crystal layer 330. Alternatively, the upper alignment film 315 may also cover the liquid crystal layer 330 and be disposed along the contour of the liquid crystal layer 330 with a uniform thickness. The upper alignment film 315 may include an inorganic insulating substance or an organic insulating substance. In an exemplary embodiment, the upper alignment film 315 may include the same substance as the lower alignment film 310.

[0080] A spacer 430 may be arranged between the lower orientation film 310 and the upper orientation film 315. The spacer 430 may be inserted between the lower orientation film 310 and the upper orientation film 315 to maintain the space between the lower orientation film 310 and the upper orientation film 315 for arranging the liquid crystal layer 330. In addition, the spacer 430 may also play a role in preventing light leakage together with the black matrix 370. Further, the spacer 430 may also play a role in controlling the movement of the above-mentioned liquid crystal molecules. The spacer 430 may include an inorganic insulating substance or an organic insulating substance. In an exemplary embodiment, the spacer 430 may include an organic substance such as a photoresist, polyacryl, polyimide, polyamide, siloxane, acryl, epoxy, etc.

[0081] A common electrode 340 may be disposed on the upper orientation film 315. The common electrode 340 may include a metal, an alloy, a metal nitride, a conductive metal oxide, a transparent conductive substance, etc. These substances may be used alone or in combination with each other. In other exemplary embodiments, the common electrode 340 may also have a multilayer structure including a plurality of metal layers. For example, the above-mentioned metal layers may have different thicknesses from each other, or may include different substances from each other.

[0082] Thus, the light emitting structure 200 including the pixel electrode 290 , the liquid crystal layer 330 , and the common electrode 340 may be disposed.

[0083] A coating layer 390 may be disposed on the common electrode 340. The coating layer 390 may planarize the step difference between the black matrix 370 and the color filter 350, and may protect the black matrix 370 and the color filter 350. For example, the coating layer 390 may fully cover the black matrix 370 and the color filter 350, and may substantially have a flat upper surface without generating a step difference around the black matrix 370 and the color filter 350. The coating layer 390 may include an organic substance.

[0084] A black matrix 370 may be arranged on the coating layer 390. The black matrix 370 may be positioned to overlap with the semiconductor element 250. The black matrix 370 may include organic substances such as photoresists, polypropylene-based resins, polyimide-based resins, polyamide-based resins, siloxane-based resins, acryl-based resins, epoxy-based resins, etc. In addition, the black matrix 370 may be substantially opaque. For example, in order to absorb light, the black matrix 370 may also include a shading material. The shading material may include carbon black, titanium nitride oxide, titanium black, phenylene black, aniline black, cyanine black, nigrosine acid black, black resin, etc.

[0085] A color filter 350 may be arranged on the coating layer 390. The color filter 350 may be arranged to overlap with the pixel electrode 290. The color filter 350 may include a red color filter, a green color filter, or a blue color filter. The color filter 350 may include a photosensitive resin and a color photoresist. In other exemplary embodiments, the color filter 350 may also include a yellow color filter, a cyan color filter, or a magenta color filter.

[0086] An upper substrate 410 may be arranged on the black matrix 370 and the color filter 350. The upper substrate 410 may be arranged to face (or be opposite to) the lower substrate 110. The upper substrate 410 and the lower substrate 110 may substantially include the same material. For example, the upper substrate 410 may include a quartz substrate, a synthetic quartz substrate, a calcium fluoride substrate, a quartz substrate doped with fluorine, a soda-lime glass substrate, an alkali-free glass substrate, etc.

[0087] Thus, it can provide Figure 2 and Figure 5 The detection member 300 is shown.

[0088] However, although the detection member 300 of the present invention is described as being limited to a liquid crystal display device (LCD), the composition of the present invention is not limited thereto. In other exemplary embodiments, the detection member 300 may also include an organic light emitting display device (OLED), a field emission display device (FED), a plasma display device (PDP), and an electrophoretic image display device (EPD).

[0089] Reference again Figure 2 , Figure 3 and Figure 4 , an optical member 570 emitting light may be arranged on the bottom surface of the detection member 300. In other words, the optical member 570 may be positioned to be spaced apart from the detection member 300 in a fourth direction D4 that is perpendicular to the first direction D1, the second direction D2, and the third direction D3. The optical member 570 may include a surface light source. The optical member 570 may provide the above-mentioned surface light source (e.g., light) in a fifth direction D5 that is opposite to the fourth direction D4, and the above-mentioned light may pass through the detection member 300. In an exemplary embodiment, the optical member 570 may include a surface light source having a relatively high luminosity. For example, the optical member 570 may emit light having a relatively high luminosity (e.g., light having a brightness higher than that of a backlight unit of a liquid crystal display device) toward the detection member 300 so as to detect misalignment of a spacer 430 included in the detection member 300, misalignment of liquid crystal molecules included in the liquid crystal layer 330, and the like. As Fig.12 As shown, the optical member 570 may overlap a portion of the detection member 300 .

[0090] The optical member 570 may be provided with a first polarization member 510. In other words, the first polarization member 510 may be located between the optical member 570 and the detection member 300. The first polarization member 510 may be opposite to the second polarization member 520. In an exemplary embodiment, the first polarization member 510 may be in direct contact with the upper surface of the optical member 570. Optionally, depending on the type of the above-mentioned surface light source of the optical member 570, the first polarization member 510 may also be spaced apart from the upper surface of the optical member 570 by a predetermined distance in the fifth direction D5. Figure 4As shown, the first polarization member 510 may include fine openings 511 extending in the first direction D1, respectively. For example, the first polarization member 510 may include a linear polarization plate (or a linear polarization film), and may transmit light oscillating left and right. In other words, the first polarization member 510 may include a first polarization axis extending in the first direction D1, and in the case where the light emitted from the optical member 570 passes through the first polarization member 510, light polarized in a direction parallel to the above-mentioned first polarization axis of the first polarization member 510 may be selectively transmitted. That is, the first polarization member 510 may block the light oscillating up and down. Therefore, the above-mentioned polarized light passing through the first polarization member 510 may be transmitted through the detection member 300. For example, since the detection member 300 uses light with a relatively high luminosity (luminosity; or high brightness), in the absence of the first polarization member 510, the above-mentioned light is directly transmitted through the detection member 300, and the measurement cannot be correctly performed in the sensing member 550. Therefore, the optical detection device 100 may include a first polarization member 510, so as to use the above-mentioned polarized light in the above-mentioned light. The first polarization member 510 may include an iodine-based substance, a substance containing a dye, a polyene-based substance, or the like.

[0091] Thus, the first structure body 700 can be provided.

[0092] However, although the first structure body 700 of the present invention is described as being spaced apart from the bottom surface of the detection member 300 in the fourth direction D4, the present invention is not limited thereto. For example, the first structure body 700 may also contact the bottom surface of the detection member 300.

[0093] The integrating sphere 530 may be located above the detection member 300. Figure 3As shown, the integrating sphere 530 may include a first opening 531 and a second opening 532. Here, the first opening 531 may be opposite to the upper surface of the first polarization member 510 (or the upper surface of the detection member 300), and the first opening 531 and the second opening 532 may also be opposite. Optionally, the first opening 531 and the second opening 532 may not be opposite, and the second opening 532 may also be located at a portion of the integrating sphere 530. The integrating sphere 530 can collect light to assist in measuring light characteristics. For example, the inside of the integrating sphere 530 may be spherical with a hollow portion, and light may be collected into the above-mentioned hollow portion to assist the sensing member 550 in measuring light characteristics. The inside of the integrating sphere 530 may be coated with a substance that uniformly reflects light, and the uniform distribution of light may be possible in the inside of the integrating sphere 530 by repeated Lambertian reflection. The above light may be incident through the first opening 531 formed at the lower end of the integrating sphere 530, and the sensing member 550 may be arranged in the second opening 532 formed at the upper end of the integrating sphere 530. The integrating sphere 530 may include a general integrating sphere.

[0094] Reference again Figure 2 and Figure 4 , the second polarization member 520 may be arranged to overlap with the first opening 531 of the integrating sphere 530. In other words, the second polarization member 520 may be located between the integrating sphere 530 and the detection member 300. For example, the second polarization member 520 may completely cover the first opening 531, and light passing through the second polarization member 520 among the light passing through the detection member 300 may be incident on the inside of the integrating sphere 530. In an exemplary embodiment, the second polarization member 520 may be in direct contact with the bottom surface of the integrating sphere 530. Alternatively, depending on the shape of the integrating sphere 530, the second polarization member 520 may also be spaced apart from the first opening 531 of the integrating sphere 530 in the fourth direction D4 by a predetermined distance. Figure 4 As shown, the second polarization member 520 may include fine openings 521 extending in the second direction D2, respectively. For example, the second polarization member 520 may include a linear polarization plate (or a linear polarization film), and may transmit light oscillating up and down. In other words, the second polarization member 520 may include a second polarization axis extending in the second direction D2, and in the case where the light passing through the detection member 300 passes through the second polarization member 520, light polarized in a direction parallel to the second polarization axis of the second polarization member 520 may be selectively transmitted. That is, the second polarization member 520 may block light oscillating left and right. Here, the second polarization axis may be substantially orthogonal to the first polarization axis. The second polarization member 520 may include an iodine-based substance, a substance containing a dye, a polyene-based substance, and the like.

[0095] Reference again Figure 2, the sensing member 550 may be arranged to overlap with the second opening 532 of the integrating sphere 530. The sensing member 550 may measure the brightness, wavelength, luminosity, illumination, spectral distribution, color temperature, color coordinates, etc. of the light collected inside the integrating sphere 530. In an exemplary embodiment, the sensing member 550 may generate a luminosity distribution curve graph by measuring the luminosity of the above-mentioned collected light. Based on the above-mentioned luminosity distribution curve graph, the misalignment of the spacer 430 included in the detection member 300 and the misalignment of the liquid crystal molecules included in the liquid crystal layer 330 may be determined. The sensing member 550 may include a spectrometer, a photodetector, a photosensor, etc.

[0096] Thus, the second structure body 600 can be provided, and the optical detection device 100 including the first structure body 700 and the second structure body 600 can be provided.

[0097] However, although the second structure body 600 of the present invention is described as being spaced apart from the upper surface of the detection member 300 in the fifth direction D5 , the present invention is not limited thereto. For example, the second structure body 600 may also be in contact with the upper surface of the detection member 300 .

[0098] In a conventional inspection process for inspecting defects of an inspection member, the conventional inspection process may be performed after forming the inspection member in a state where a polarizing plate and a backlight unit are fastened to the inspection member (e.g., a display device). The conventional inspection process may include a method of transmitting light through the display device and a method of causing the display device to reflect light.

[0099] In the case of performing the above-mentioned conventional detection process, an optical member (e.g., a light source) capable of emitting light and a camera for capturing light may be positioned around the above-mentioned display device. Here, in the method of transmitting light in the above-mentioned conventional detection process, the above-mentioned light source may be positioned on the bottom surface of the above-mentioned display device, and in the method of reflecting light in the above-mentioned conventional detection process, the above-mentioned light source may be positioned on the upper surface of the above-mentioned display device.

[0100] For example, in a conventional inspection process for detecting defects of the display device by reflected light, light may be emitted from the light source in a direction orthogonal to the upper surface of the display device, and after the light is transmitted through the upper surface of the display device and incident on the inside of the display device, it may be specularly reflected (or diffusely reflected) by a component included in the display device. After the reflected light is transmitted through the upper surface of the display device and emitted to the outside of the display device, the light may be incident on a camera. In this case, in order to photograph the light emitted to the outside, a camera may be repeatedly photographed multiple times at a predetermined angle (e.g., an angle inclined relative to the upper surface of the display device), or a plurality of cameras may be arranged at multiple angles for photographing (e.g., photographing defects of the display device at a specific angle). In addition, even when the light emitted from the light source is incident at a slightly inclined angle relative to the upper surface to detect defects of the display device, detection may be performed. Therefore, defects of the display device may be detected by analyzing the image photographed by the camera with the naked eye.

[0101] In addition, in the process of detecting defects of the above-mentioned display device by transmitting light, light can be emitted from the above-mentioned light source in a direction orthogonal to the bottom surface of the above-mentioned display device, and after the above-mentioned light is incident on the inside of the above-mentioned display device through the bottom surface of the above-mentioned display device, it can be transmitted through the upper surface of the above-mentioned display device and emitted to the outside of the above-mentioned display device. The above-mentioned emitted light can be incident on a camera. In this case, in order to shoot the above-mentioned light emitted to the outside, one camera can repeat shooting multiple times at a predetermined angle (for example, an angle inclined relative to the upper surface of the above-mentioned display device), or multiple cameras can be arranged at multiple angles to shoot (for example, the defects of the above-mentioned display device are photographed at a specific angle). Therefore, the defects of the above-mentioned display device can be detected by analyzing the images taken by the above-mentioned camera with the naked eye.

[0102] In this case, since the detection time becomes relatively long and the captured image is analyzed with the naked eye, it is difficult to find defects in the display device. In addition, in the case of a minor defect, since it is not displayed in the captured image, it may not be possible to accurately perform the detection of the defects in the display device. Furthermore, in the case of a liquid crystal display device, since the detection is performed with the polarizing plate and the backlight unit attached, if the liquid crystal display device is determined to be defective, the polarizing plate and the backlight unit are also discarded together, so the cost loss is large.

[0103] The optical inspection device 100 according to the exemplary embodiment of the present invention can transmit light through the inspection member 300 and measure the luminosity distribution curve of the light collected in the integrating sphere 530. In the case where a luminosity distribution curve different from the luminosity distribution curve of a normal inspection member is measured, the inspection member 300 can be judged to be defective. Therefore, the above-mentioned luminosity distribution curve can be used to accurately judge the defect of the inspection member 300 without analyzing the defect of the inspection member 300 with the naked eye.

[0104] However, although it is described that the upper surface of the first structure 700 of the present invention is parallel to the bottom surface of the detection member 300 or the bottom surface of the second structure 600 is parallel to the upper surface of the detection member 300, the configuration of the present invention is not limited thereto. For example, according to the detection method, the upper surface of the first structure 700 may also be positioned to be inclined relative to the bottom surface of the detection member 300, or the bottom surface of the second structure 600 may also be positioned to be inclined relative to the upper surface of the detection member 300.

[0105] In addition, the optical detection device 100 of the present invention may also include a moving member and a cover member, wherein the moving member is used to move each of the first structure body 700 and the second structure body 600 on the detection member 300 , and the cover member is used to protect the optical detection device 100 .

[0106] Figure 6 and Figure 7 3 is a perspective view for describing light transmitted through a detection member. For convenience, only the detection member 300 and the integrating sphere 530 are shown.

[0107] refer to Figure 2 , Figure 3 , Figure 6 and Figure 7 , in the first portion of the detection member 300 where no light is leaking, as Figure 6 As shown, the light transmitted through the detection member 300 may be emitted in parallel to the fifth direction D5 orthogonal to the upper surface of the detection member 300. Since the optical member 570 uses light with a relatively high luminosity, the light may also leak through the liquid crystal molecules included in the liquid crystal layer 330, and may be transmitted even without defects of the spacer 430 and the black matrix 370. Here, the leaked light may be light that oscillates left and right through the first polarization member 510. The light oscillating left and right may all be blocked by the second polarization member 520.

[0108] In the second portion of the detection member 300 where light leakage occurs, as shown in FIG. Figure 7As shown, the light transmitted through the detection member 300 may include a first light and a second light, wherein the first light is emitted in parallel along the fifth direction D5, and the second light is emitted at an angle inclined relative to the upper surface of the detection member 300. As previously described, the first light may be a left-right oscillating light. In addition, in the case where the liquid crystal molecules included in the liquid crystal layer 330 are not accurately formed (for example, the liquid crystal molecules are damaged due to external impact during the manufacture of the detection member 300), the angle of the liquid crystal molecules may deviate. In this case, the left-right oscillating light incident on the detection member 300 may be reflected so that the phase of the light is changed, and the light whose phase is changed may be emitted to the outside of the detection member 300. That is, the light whose phase is changed may correspond to the second light. Such a second light may not be completely blocked by the second polarization member 520, and a portion of the second light may move to the inside of the integrating sphere 530.

[0109] Figure 8 and Fig. 9 It is a simulated image of light transmitted through the detection member and displayed on the detection member.

[0110] refer to Figure 8 In a portion of the detection member 300 where no light is leaking, a signal such as Figure 8 For example, in the above image, the cross shape may correspond to the portion where light is blocked by the liquid crystal molecules of the liquid crystal layer 330, and the points displayed relatively brightly at the remaining portion (e.g., the points displayed relatively brightly at the first to fourth portions defined by the above cross) may correspond to the light transmitted through the detection member 300 and emitted along the fifth direction D5. For example, the points displayed relatively brightly at the above remaining portion may correspond to the light emitted by reflection from the electrodes (e.g., gate electrodes, source and drain electrodes, pixel electrodes, common electrodes, etc.) included in the liquid crystal display device. That is, the portion where light is blocked by the liquid crystal molecules and the portion that is not blocked can be clearly distinguished.

[0111] refer to Fig. 9 In the case where the optical detection device 100 does not include the first polarization member 510, a Fig. 9 That is, the portion where light is blocked by the liquid crystal molecules and the portion where light is not blocked are not clearly distinguished. Therefore, in order to clearly distinguish the portion where light is blocked by the liquid crystal molecules and the portion where light is not blocked, the optical detection device 100 must include the first polarization member 510. In other exemplary embodiments, the first polarization member 510 may also include a bandpass filter.

[0112] Fig.10is a photometric distribution curve image of light incident on the integrating sphere among the light transmitted through the detection member, and Fig.11 is included in Figure 1 A luminosity distribution curve graph generated by a sensing component in an optical detection device.

[0113] refer to Fig.10 , in the first portion of the detection member 300 where no light is leaked, the left-right oscillating light transmitted through the detection member 300 may be completely blocked by the second polarization member 520. Therefore, since substantially no light is incident on the integrating sphere 530, the first image S1 representing the luminous intensity distribution of the light incident on the integrating sphere 530 may be dark or substantially black. However, since there is also light reflected and emitted by the above-mentioned electrodes included in the liquid crystal display device, a portion of the light may be transmitted through the second polarization member 520 to be incident on the integrating sphere 530, and a graph (e.g., a second graph G2) based on the luminous intensity distribution of the detection member 300 without a defect may be generated.

[0114] Different from this, in the second part of the detection member 300 where the light leakage occurs, the first light and the second light can be transmitted through the detection member 300. Since the first light corresponds to the light oscillating left and right, it can be completely blocked by the second polarization member 520. Therefore, since there is substantially no light incident on the integrating sphere 530, the central part of the second image S2 representing the luminosity distribution can be substantially black. In addition, since the second light corresponds to the light whose phase is changed, it can not be completely blocked by the second polarization member 520, and a part of the second light can move to the inside of the integrating sphere 530. Therefore, since the light incident on the integrating sphere 530 is relatively large, the peripheral part of the second image S2 representing the luminosity distribution can be displayed relatively brightly. For example, due to the misalignment of the liquid crystal molecules included in the liquid crystal layer 330, the light incident on the detection member 300 may be reflected by the liquid crystal molecules, so that the phase of the light is changed, and the light whose phase is changed and the light emitted by the reflection of the electrodes included in the liquid crystal display device can be transmitted through the second polarization member 520 to be incident on the integrating sphere 530. Thereby, a relatively large amount of light may move to the inside of the integrating sphere 530 , and a graph (eg, a first graph G1 ) having a luminous intensity distribution in which the intensity of light relatively increases may be generated.

[0115] refer to Fig.11, the sensing member 550 may generate a first graph G1 based on the first image S1 and the second image S2 representing the above-mentioned luminosity distribution. Here, the second graph G2 corresponds to a graph generated based on the luminosity distribution of the detection member 300 without defects. As mentioned above, in the case where there is a defect in the detection member 300, the light whose phase is changed like the above-mentioned second light may not be completely blocked by the second polarization member 520, and there may be light incident on the integrating sphere 530. Therefore, when compared with the second graph G2, the intensity of the first graph G1 is measured as relatively stronger in the portion where the wavelength of the light is equivalent to 430 nanometers, 510 nanometers, and 610 nanometers. In this case, the detection member 300 that measures the first graph G1 can be determined to be defective.

[0116] In other exemplary embodiments, the optical detection device 100 may also include a condenser lens, a reflective lens, a slit, etc. arranged inside the integrating sphere 530. In this case, specific light incident on the integrating sphere 530 may be absorbed and / or removed to control the detection range of the detection member 300, or a specific wavelength band may be selected for detection (for example, as shown in the first graph G1 and the second graph G2, the intensity of the light is different only at a specific wavelength band).

[0117] Figures 12 to 15 It is a perspective view showing a method of detecting a detection member using an optical detection device.

[0118] refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 and Fig.12 , on the bottom surface of the detection member 300, the first structure body 700 may be positioned to overlap with the first portion of the detection member 300, and on the upper surface of the detection member 300, the second structure body 600 may be positioned to overlap with the first portion. Here, the first structure body 700 may include a first polarization member 510 and an optical member 570, and the second structure body 600 may include a second polarization member 520, an integrating sphere 530, and a sensing member 550. In order to detect defects of the detection member 300, the detection member 300 may be located between the first structure body 700 and the second structure body 600.

[0119] The detection member 300 may extend in the first direction D1 and the second direction D2 (or the third direction D3 and the second direction D2), and may substantially have a plate shape. For example, the detection member 300 may include Figure 5Liquid crystal display device. Here, the detection member 300 may include a lower substrate 110, a semiconductor element 250, a light emitting structure 200, a spacer 430, a lower orientation film 310, an upper orientation film 315, a coating layer 390, a black matrix 370, a color filter 350, an upper substrate 410, etc. Here, the semiconductor element 250 may include a gate electrode 170, a gate insulating layer 150, an active layer 130, an interlayer insulating layer 190, a source electrode 210, and a drain electrode 230, and the light emitting structure 200 may include a pixel electrode 290, a liquid crystal layer 330, and a common electrode 340. In an exemplary embodiment, the above-mentioned liquid crystal display device does not include a polarizing plate and a backlight unit.

[0120] The optical member 570 emitting light may be located on the bottom surface of the detection member 300. In other words, the optical member 570 may be positioned to be spaced apart from the detection member 300 in the fourth direction D4. The optical member 570 may include a surface light source. In an exemplary embodiment, the optical member 570 may include a surface light source having a relatively high luminosity. For example, the optical member 570 may emit light having a relatively high luminosity (e.g., light having a brightness higher than that of a backlight unit of a liquid crystal display device) toward the detection member 300 so as to detect the misalignment of the spacer 430 included in the detection member 300, the misalignment of the liquid crystal molecules included in the liquid crystal layer 330, and the like.

[0121] The first polarization member 510 may be located on the optical member 570. In other words, the first polarization member 510 may be located between the optical member 570 and the detection member 300. The first polarization member 510 may be opposite to the second polarization member 520. In an exemplary embodiment, the first polarization member 510 may be in direct contact with the upper surface of the optical member 570. Optionally, depending on the type of the above-mentioned surface light source of the optical member 570, the first polarization member 510 may also be spaced apart from the upper surface of the optical member 570 in the fifth direction D5 by a predetermined distance. Figure 4 As shown, the first polarization member 510 may include fine openings 511 extending in the first direction D1, respectively. For example, the first polarization member 510 may include a linear polarization plate (or a linear polarization film) and may transmit light oscillating left and right. In other words, the first polarization member 510 may include a first polarization axis extending in the first direction D1. The first polarization member 510 may be formed using an iodine-based substance, a substance containing a dye, a polyene-based substance, etc.

[0122] The integrating sphere 530 may be located above the detection member 300. Figure 3As shown, the integrating sphere 530 may include a first opening 531 and a second opening 532. Here, the first opening 531 may be opposite to the upper surface of the first polarization member 510 (or the upper surface of the detection member 300), and the first opening 531 and the second opening 532 may also be opposite. Optionally, the first opening 531 and the second opening 532 may not be opposite, and the second opening 532 may also be located at a portion of the integrating sphere 530. The integrating sphere 530 can collect light to assist in measuring light characteristics. For example, the inside of the integrating sphere 530 may be spherical with a hollow portion, and light may be collected to the above-mentioned hollow portion to assist the sensing member 550 in measuring light characteristics. The inside of the integrating sphere 530 may be coated with a substance that uniformly reflects light, and the uniform distribution of light may be possible in the inside of the integrating sphere 530 by repeated Lambertian reflection. The above light may be incident through the first opening 531 formed at the lower end of the integrating sphere 530, and the sensing member 550 may be located in the second opening 532 formed at the upper end of the integrating sphere 530. The integrating sphere 530 may include a general integrating sphere.

[0123] The second polarization member 520 may be positioned to overlap with the first opening 531 of the integrating sphere 530. In other words, the second polarization member 520 may be located between the integrating sphere 530 and the detection member 300. For example, the second polarization member 520 may completely cover the first opening 531. In an exemplary embodiment, the second polarization member 520 may be in direct contact with the bottom surface of the integrating sphere 530. Alternatively, depending on the shape of the integrating sphere 530, the second polarization member 520 may also be spaced apart from the first opening 531 of the integrating sphere 530 in the fourth direction D4 by a predetermined distance. Figure 4 As shown, the second polarization member 520 may include fine openings 521 extending in the second direction D2, respectively. For example, the second polarization member 520 may include a linear polarization plate (or a linear polarization film) and may transmit light that oscillates up and down. In other words, the second polarization member 520 may include a second polarization axis extending in the second direction D2. Here, the second polarization axis may be substantially orthogonal to the first polarization axis. The second polarization member 520 may be formed using an iodine-based substance, a substance containing a dye, a polyene-based substance, etc.

[0124] The sensing member 550 may be positioned to overlap with the second opening 532 of the integrating sphere 530. The sensing member 550 may measure the brightness, wavelength, luminosity, illumination, spectral distribution, color temperature, and color coordinates of the light collected inside the integrating sphere 530. In an exemplary embodiment, the sensing member 550 may generate a luminosity distribution curve graph by measuring the luminosity of the above-mentioned collected light. Based on the above-mentioned luminosity distribution curve graph, the misalignment of the spacer 430 included in the detection member 300 and the misalignment of the liquid crystal molecules included in the liquid crystal layer 330 may be determined. The sensing member 550 may include a spectrometer, a photodetector, a photoelectric sensor, and the like.

[0125] Thus, the optical detection device 100 including the first structure body 700 and the second structure body 600 can be provided.

[0126] Reference again Figure 2 and Fig.12 , after positioning the optical detection device 100 to overlap the above-mentioned first portion of the detection member 300, light may be emitted from the optical member 570. In the case where the light emitted from the optical member 570 passes through the first polarization member 510, light polarized in a direction parallel to the above-mentioned first polarization axis of the first polarization member 510 may be selectively transmitted. That is, light oscillating up and down may be blocked by the first polarization member 510, and light oscillating left and right may be transmitted.

[0127] The light oscillating left and right may be transmitted through the detection member 300 .

[0128] There is no light leakage in the first portion of the detection member 300 (eg, Fig.10 In the first image S1 of FIG. 5 , the left-right oscillating light transmitted through the detection member 300 in the first portion of the detection member 300 may be completely blocked by the second polarization member 520. Therefore, since substantially no light is incident on the integrating sphere 530, the first image S1 representing the luminous intensity distribution of the light incident on the integrating sphere 530 may be dark or substantially black. However, since there is also light reflected and emitted by the electrodes included in the liquid crystal display device, a portion of the light may be transmitted through the second polarization member 520 and incident on the integrating sphere 530.

[0129] In contrast, in the case where light leakage occurs in the first portion of the detection member 300 (eg, Fig.10In the second image S2 represented by the detection member 300, in the first part of the detection member 300, the first light and the second light may be transmitted through the detection member 300. Since the first light corresponds to light oscillating left and right, it may be completely blocked by the second polarization member 520. Therefore, since there is substantially no light incident on the integrating sphere 530, the central part of the second image S2 representing the luminosity distribution may be substantially dark or substantially black. In addition, since the second light corresponds to light whose phase is changed, it may not be completely blocked by the second polarization member 520, and a part of the second light may move to the inside of the integrating sphere 530. Therefore, since there is relatively more light incident on the integrating sphere 530, the outer periphery of the second image S2 representing the luminosity distribution may be displayed relatively brightly.

[0130] A first luminance distribution graph (e.g., first graph G1) may be generated by the sensing member 550 based on the light incident to the integrating sphere 530. After the first luminance distribution graph is generated, a defect of the detection member 300 may be detected by comparing it with a luminance distribution graph (e.g., second graph G2) of a detection member without defects. For example, if a higher light intensity than the above luminance distribution graph of the above detection member without defects is measured in a specific wavelength, the detection member 300 may be determined to be defective.

[0131] refer to Fig.13 , Fig.14 and Fig.15 , the position of the optical inspection device 100 can be changed. For example, the entire inspection member 300 can be inspected in a manner of moving the optical inspection device 100 along the first direction D1, the second direction D2, and the third direction D3. Thus, the second to n-th (where n is an integer greater than or equal to 3) luminance distribution curve graphs can be generated, and defects of the inspection member 300 can be detected by comparing the second to n-th luminance distribution curve graphs with the luminance distribution curve graph of the inspection member without defects.

[0132] After defect detection of the detection member 300 is completed using the optical detection device 100 , the polarization plate and the backlight unit may be fastened to the detection member 300 determined to be normal.

[0133] Thus, a method of inspecting the inspection member 300 using the optical inspection device 100 can be provided.

[0134] In the method of inspecting the inspection member 300 using the optical inspection device 100 according to the exemplary embodiment of the present invention, defect inspection can be performed before attaching the polarizing plate and the backlight unit to the inspection member 300, so even if a defect of the inspection member 300 occurs, the polarizing plate and the backlight unit are not discarded together. Thus, the manufacturing cost can be relatively reduced.

[0135] In addition, the defects of the detection member 300 can be determined by the above-mentioned luminosity distribution curve diagram, so the above-mentioned luminosity distribution curve diagram can be used to accurately judge the defects of the detection member 300 without using the naked eye to analyze the defects of the detection member 300. As a result, the time for using the optical detection device 100 to detect the detection member 300 can also be relatively reduced, and tiny defects that cannot be distinguished by the naked eye can also be found.

[0136] Although the present invention has been described above with reference to exemplary embodiments, it will be appreciated by those skilled in the art that various modifications and changes may be made to the present invention without departing from the spirit and scope of the invention as described in the appended claims.

[0137] Industrial Availability

[0138] The present invention can be applied to various detection devices capable of detecting defects of detection components. For example, the present invention can be applied to detection devices for detecting numerous electronic instruments such as display devices for vehicles, ships and aircraft, portable communication devices, display devices for display or information transmission, display devices for medical use, etc.

Claims

1. An optical detection device, comprising: an optical member located on a bottom surface of the detection member and emitting light; A first polarization component, located between the optical component and the detection component; an integrating sphere, located above the detection member, including a first opening and a second opening, and collecting light; a second polarization member arranged to overlap with the first opening of the integrating sphere; as well as a sensing member arranged to overlap with the second opening of the integrating sphere, and Wherein, the optical detection device is configured to: generate a light intensity distribution curve graph through the sensing member based on the light incident on the integrating sphere; And the generated luminosity distribution curve diagram is compared with the luminosity distribution curve diagram of a normal detection component to detect defects of the detection component.

2. The optical detection device according to claim 1, wherein: The first polarization member and the second polarization member include linear polarization plates.

3. The optical detection device according to claim 1, wherein: A first polarization axis of the first polarization member is orthogonal to a second polarization axis of the second polarization member.

4. The optical detection device according to claim 1, wherein: The first polarization member includes a first polarization axis extending in a first direction.

5. The optical detection device according to claim 4, wherein: The second polarization member includes a second polarization axis extending in a second direction.

6. The optical detection device according to claim 5, wherein: In a case where light emitted from the optical member passes through the first polarization member, the first polarization member selectively transmits light polarized in a direction parallel to the first polarization axis.

7. The optical detection device according to claim 6, wherein: The polarized light that has passed through the first polarization member is transmitted through the detection member.

8. The optical detection device according to claim 7, wherein: In the case where the light transmitted through the detection member passes through the second polarization member, the second polarization member selectively transmits light polarized in a direction parallel to the second polarization axis.

9. The optical detection device according to claim 8, wherein: The first polarization axis is orthogonal to the second polarization axis.

10. The optical detection device according to claim 1, wherein: The sensing member includes one of a spectrometer, a photodetector, and a photoelectric sensor, and the optical member includes a surface light source.

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