JP2008216810A - Liquid crystal panel inspecting device and liquid crystal panel inspection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal panel inspection device and a liquid crystal panel inspection method for easily and surely repairing (correcting) defects of a liquid crystal panel without making a polarizing plate useless. <P>SOLUTION: Lighting inspection of a liquid crystal panel 10 is made possible without polarizing plates on the liquid crystal panel 10 by irradiating the liquid crystal panel 10 with light from a backlight 32 provided with a polarizing plate 32B, whereby defects can be repaired (corrected) without removing polarizing plates when being confirmed on the liquid crystal panel 10 by lighting inspection. Further, since polarizing plates placed in defective parts are not discarded, uselessness of polarizing plates can be prevented to reduce the manufacturing cost of the liquid crystal panel 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a liquid crystal panel inspection apparatus and a liquid crystal panel inspection method for inspecting the presence or absence of defects (defects) in a liquid crystal panel used in a personal computer, a liquid crystal flat panel television, and the like.

  In recent years, the demand for liquid crystal displays is expanding as display devices for personal computers and liquid crystal flat-screen televisions. In the manufacturing process of a liquid crystal panel which is a component of a liquid crystal display, a lighting inspection of the liquid crystal panel is performed in order to investigate defects such as pixel defects, disconnection or short of scanning lines and signal lines, and display spots. This lighting inspection is performed by turning on the liquid crystal panel and checking the lighting state by visual inspection or automatic inspection using a camera. The lighting inspection is performed as a final inspection of the cell process, and is performed after liquid crystal injection / sealing and application of a polarizing plate. The defect detected by the lighting inspection is removed by removing the polarizing plate, repairing the defective portion, and attaching a new polarizing plate again.

  Here, the lighting inspection method for the liquid crystal panel will be described in detail. As shown in FIG. 6, a liquid crystal panel 100 that is a target of a conventional lighting inspection method seals a liquid crystal (material) 106 between a color filter substrate 102 and an array substrate 104, and the surface of the color filter substrate 102. The polarizing plates 108 and 110 are respectively attached to the surface of the array substrate 104 with an adhesive or the like. As described above, the liquid crystal panel 100 is inspected by being irradiated with light from the backlight 112 (which does not have a polarizing function) as a light source with the polarizing plates 108 and 110 attached to the front and back surfaces, respectively. .

  As shown in FIG. 7, as a specific inspection process, first, after the array substrate manufacturing process S200 for manufacturing the array substrate 104 and the color filter process S210 for manufacturing the color filter substrate 102, the array substrate 104 and the color are processed. An alignment film step S220 for forming an alignment film of the filter substrate 102, a spacer formation step S230 for forming the spacer 105, a liquid crystal sealing / sealing step S240 for sealing and sealing liquid crystal, and a polarizing plate for attaching the polarizing plates 108 and 110 It is carried out in the order of the pasting step S250. In the conventional inspection method, the alignment film step S220, the spacer formation step S230, the liquid crystal encapsulation / sealing step S240, and the polarizing plate pasting step S250 become the cell manufacturing step S260. Thereafter, in a lighting inspection step S270, a lighting inspection using the backlight 112 is performed, and if a defect (defect) occurs in the liquid crystal panel 100, a polarizing plate peeling step S280 is performed in which the polarizing plates 108 and 110 are peeled off, A defect correction step S290 for correcting a defect (defect) is performed. Then, a polarizing plate attaching step S300 for attaching the polarizing plates 108 and 110 is performed again, and a relighting inspection is performed in the relighting inspection step S310. If no defect has occurred in the liquid crystal panel 100 or if the defect has been corrected, the driver mounting step S320 is executed, and the process proceeds to the next step.

  Note that the above prior art is a public technique, and the present invention has been developed based on the public technique. For this reason, the applicant does not know the existence of a document known invention related to the present invention at the time of filing a patent application, and omits the description of the name of the document known invention and the location of other information related to the document known invention.

  By the way, in the conventional lighting inspection method, it is impossible to inspect unless the liquid crystal panel 100 is in a state before being connected to the driver IC (a state indicated by reference numeral 100 in FIG. 6). Therefore, when the liquid crystal panel 100 has a defect, the polarizing plates 108 and 110 have to be peeled in order to repair the defect. For this reason, the number of steps for peeling off the polarizing plates 108 and 110 is increased, and the peeled polarizing plates 108 and 110 are discarded, so that the manufacturing cost of the liquid crystal panel 100 is also greatly increased.

  Further, in the visual inspection in which the liquid crystal panel 100 is irradiated with light from the backlight 112 and the presence or absence of a defect is confirmed with the human eye, the position of the defect cannot be accurately stored. It may take time, or the wrong position may be wrong. For this reason, much time is required to repair the defect. Thus, in order to solve this time problem, a method of directly marking the liquid crystal panel 100 to be inspected to indicate the defect position has been adopted, but the defect position of the liquid crystal panel 100 can be easily specified. However, after repairing the defect, another problem arises that forgetting to erase the marking or that the marking becomes dirty and causes a new defect.

  Further, in the automatic inspection in which the liquid crystal panel 100 is irradiated with light from the backlight 112 and the presence or absence of a defect is confirmed with a camera, the defect position of the liquid crystal panel 100 can be accurately stored, but the configuration of the inspection apparatus is complicated and large. Therefore, there has been a problem that the introduction cost of the inspection apparatus is high and the inspection time is long.

  In view of the above circumstances, the present invention provides a liquid crystal panel inspection apparatus and a liquid crystal panel inspection method capable of easily and reliably repairing (correcting) defects in a liquid crystal panel without wasting a polarizing plate. For the purpose.

  In addition, in consideration of the above circumstances, the present invention suppresses the enlargement and complexity of the liquid crystal panel inspection apparatus, and can reduce the manufacturing cost of the liquid crystal panel and the introduction cost of the liquid crystal panel inspection apparatus, and An object is to provide a liquid crystal panel inspection method.

  The invention described in claim 1 is a liquid crystal panel inspection apparatus that inspects a liquid crystal panel configured by enclosing liquid crystal in a glass substrate and irradiating the liquid with a light source unit that emits light and light from the light source unit And a polarizing part for irradiating the liquid crystal panel with polarized light.

  According to a second aspect of the present invention, in the liquid crystal panel inspection apparatus according to the first aspect, a control unit that causes the polarizing unit to display an arbitrary mark that can be transmitted through the liquid crystal panel, and a defect of the liquid crystal panel. And an operation unit for determining the position of the mark, and the position of the mark determined by the operation unit is input to the control unit.

  The invention according to claim 3 is a liquid crystal panel inspection method for inspecting a liquid crystal panel configured by enclosing a liquid crystal in a glass substrate by irradiating light to the liquid crystal panel. A light irradiating step for irradiating the liquid crystal panel; and a defect inspection step for inspecting the liquid crystal panel for the presence or absence of defects based on the light that has been applied to the liquid crystal panel and transmitted through the liquid crystal panel.

  According to a fourth aspect of the present invention, in the liquid crystal panel inspection method according to the third aspect, an arbitrary mark displayed on the light emitting unit is transmitted through the liquid crystal panel, and the mark on the liquid crystal panel is moved by the operation unit. An operation step of identifying the position of the defect of the liquid crystal panel by moving to a defect portion of the liquid crystal panel, and an input step of inputting the position of the defect of the liquid crystal panel identified by the operation unit to the control unit It is characterized by that.

  According to the first aspect of the present invention, the light from the light source unit is polarized by the polarizing unit and applied to the liquid crystal panel. Thereby, even when the polarizing plate is not affixed on the liquid crystal panel, the light transmitted through the liquid crystal panel can be visually observed to confirm defects (defects) such as scratches on the liquid crystal panel. As a result, even when a defect is confirmed in the liquid crystal panel, the step of peeling the polarizing plate can be omitted, and the work load can be reduced. Moreover, since the peeled polarizing plate is not discarded, it is possible to prevent the polarizing plate from being wasted and to reduce the manufacturing cost. Furthermore, since the liquid crystal panel inspection apparatus is composed only of the light source section and the polarization section, the introduction cost of the liquid crystal panel inspection apparatus can be reduced without increasing the size and complexity.

  According to the second aspect of the present invention, an arbitrary mark is displayed on the polarization unit by the control unit. This mark is transmitted through the liquid crystal panel. For this reason, the operator can visually recognize the mark displayed on the polarizing portion on the liquid crystal panel. When a defect is found in the liquid crystal panel, the operation unit is operated to move the mark so that the mark overlaps the defective part, and the position of the mark overlapping the defective part is determined. Then, the position of the mark determined by the operation unit is input to the control unit. Thereby, the position of this mark becomes the position of the defect of the liquid crystal panel. As a result, the position of the defect in the liquid crystal panel can be easily and accurately specified.

  According to the invention described in claim 3, in the light irradiation step, the polarized light is irradiated from the light emitting portion to the liquid crystal panel. In the defect inspection process, the presence or absence of a defect in the liquid crystal panel is inspected based on the light irradiated to the liquid crystal panel and transmitted through the liquid crystal panel. Thereby, even when the polarizing plate is not affixed on the liquid crystal panel, the light transmitted through the liquid crystal panel can be visually observed to confirm defects (defects) such as scratches on the liquid crystal panel. As a result, even when a defect is confirmed in the liquid crystal panel, the step of peeling the polarizing plate can be omitted, and the work load can be reduced. Moreover, since the peeled polarizing plate is not discarded, it is possible to prevent the polarizing plate from being wasted and to reduce the manufacturing cost. Furthermore, since the liquid crystal panel inspection apparatus is composed only of the light source section and the polarization section, the introduction cost of the liquid crystal panel inspection apparatus can be reduced without increasing the size and complexity.

  According to the fourth aspect of the present invention, in the operation step, an arbitrary mark displayed on the light emitting unit is transmitted to the liquid crystal panel, and the mark on the liquid crystal panel is placed at a position overlapping the defect position of the liquid crystal panel by the operation unit. The position of the defect of the liquid crystal panel is specified by moving. In the input step, the position of the defect of the liquid crystal panel specified by the operation unit is input to the control unit. Thereby, the position of this mark becomes the position of the defect of the liquid crystal panel. As a result, the position of the defect in the liquid crystal panel can be easily and accurately specified.

  Next, a liquid crystal panel inspection apparatus and a liquid crystal panel inspection method according to an embodiment of the present invention will be described with reference to the drawings.

  First, the structure of the liquid crystal panel to be inspected will be described.

  As shown in FIG. 1, the liquid crystal panel 10 includes an array substrate 12 and a color filter substrate 14, and a liquid crystal (liquid crystal material) 16 is enclosed between the array substrate 12 and the color filter substrate 14. It is sealed and configured. For this reason, the polarizing plate is not affixed on the liquid crystal panel 10 to be inspected.

  The array substrate 12 is referred to as a TFT (Thin-Film-Transistor) substrate, and is a substrate through which white light, which will be described later, passes or does not pass. Specifically, the array substrate 12 is manufactured by forming the transistor 12B on the upper surface of the glass substrate 12A on the liquid crystal side in the array manufacturing process. Note that an alignment film 12C is formed on the upper surface of the transistor 12B on the liquid crystal side.

  The liquid crystal 16 is a nematic liquid crystal. In general, this liquid crystal is closely related to a statistical average orientation direction of molecules called a director, and dielectric properties and optical properties. In a liquid crystal panel, the properties of this liquid crystal are positive. Used. The dielectric constant of the nematic liquid crystal normally used for liquid crystal panels is large in the director direction and small in the direction perpendicular to the director (positive liquid crystal), and small in the director direction and large in the direction perpendicular to the director (negative liquid crystal). There is. In addition, as an optical property, it is common to use a material whose refractive index is large with respect to the photoelectric field in the director direction and small with respect to the photoelectric field in the direction perpendicular to the director. In a liquid crystal panel, electrodes are provided on a substrate such as glass, and the alignment direction of the liquid crystal material disposed in the vicinity of the substrate is controlled by an electric field applied between the electrodes, and a desired display is obtained from the relationship between the alignment direction and the refractive index. obtain.

  The color filter substrate 14 is a CF (Color Filter) substrate, and is a substrate for changing white light into three colors of R, G, and B (red, green, and blue). The color filter substrate 14 is formed with a colored layer 14B that transmits R (red), G (green), and B (blue) light on the liquid crystal side upper surface of the glass substrate 14A in correspondence with the pixels in the color filter manufacturing process. It is manufactured by doing. For this reason, the passing light of each pixel can be colored R, G, and B, and color display can be realized. By controlling the voltage of each pixel, arbitrary color development is possible at an arbitrary point on the screen (non-color generation = black is also possible). An alignment film 14C is formed on the upper surface of the colored layer 14B on the liquid crystal side.

  In the liquid crystal panel 10, the array substrate 12 and the color filter substrate 14 are aligned with the alignment films 12 </ b> C and 14 </ b> C facing each other via the spacer 18 obtained in the spacer formation step, and then the array substrate 12 and the color filter substrate 14 are aligned. Liquid crystal is sealed in a gap formed between the filter substrate 14 and the liquid crystal is sealed by a seal member 20. In this way, the liquid crystal panel 10 is manufactured.

  Next, a liquid crystal panel inspection apparatus will be described.

  As shown in FIGS. 1 and 2, the liquid crystal panel inspection apparatus 30 includes a backlight 32. As shown in FIG. 3, the backlight 32 includes a light source unit 32A that emits light and a polarizing plate 32B that polarizes light from the light source unit 32A. That is, the backlight 32 is a light source having a polarization function, and can irradiate the above-described liquid crystal panel 10 with polarized light.

  Here, although the basic principle of a polarizing plate that polarizes light is conventionally known, a plurality of gaps are formed and only light that vibrates in a certain direction is transmitted. For example, by overlapping two smoke polarizing plates and rotating one of them by 90 degrees with respect to the other, the direction (phase) of the gap between them is made parallel or perpendicular to make it visually transparent or black Can be. This is because when the direction (phase) of the gap is parallel, the light oscillating in a certain direction can be recognized by the human eye through the two polarizing plates, but the direction (phase) of the gap is vertical. In this case, even if light oscillating in a certain direction passes through one polarizing plate, it cannot pass through the other polarizing plate and cannot be recognized by human eyes. Further, for example, a red color polarizing plate and a color polarizing plate are overlapped, and one of them is rotated 90 degrees with respect to the other so that the direction (phase) of the gap between the two is parallel or vertical, so that it is visually transparent. Or it can be red.

  The backlight 32 used in the present invention is preferably a liquid crystal display (LCD, PDP, EL, etc.) used in a personal computer or the like. The liquid crystal display includes an optical filter that functions as a polarizing plate. An optical filter is an element that converts natural light into linearly polarized light. The general function is to pass incident light through only one of the orthogonal polarization components and shield the other by absorption (or reflection / scattering). It is. Many of the polarizing plates that are currently in mass production and practical use for LCDs are made by dyeing and adsorbing dichroic materials such as iodine and organic dyes on a base film (polyvinyl alcohol: PVA), and then highly stretching and orienting them. In this, absorption dichroism is expressed. The optical characteristics of the polarizing plate can be represented by three parameters: transmittance (T), polarization degree (P), and hue. In particular, the T and P values are important characteristics because they are directly related to the brightness and contrast of the LCD, and it is required to sufficiently ensure them in the visible light region.

  Further, as shown in FIGS. 2 and 4, a control device 34 such as a personal computer is electrically connected to the backlight 32. The control device 34 inputs a defect (defect) type (for example, scratches, spots, short circuits, etc.), a defect level, a display part (monitor) 36 that displays a defect part (defect position), and predetermined information. Alternatively, an operation unit 38 for displaying an arbitrary mark A such as a cursor or a pointer on the surface of the backlight 32, a predetermined program is stored, a predetermined calculation process is executed, and the obtained value is stored as data. And a control main body 40 that can be used. By operating the operation unit 38, the mark A such as a cursor or a pointer can be variably displayed on the surface of the backlight 32, and the position of the mark A such as the cursor or the pointer can be input to the control main body 40. . The control device 34 can be connected to other control devices, communication devices, servers, and the like, and the obtained values can be shared by other control devices.

  Next, a liquid crystal panel inspection method using the liquid crystal panel inspection apparatus 30 of the present embodiment will be described.

  As shown in FIG. 5, the array substrate 12 is manufactured in the array manufacturing step S10. The array substrate 12 is manufactured by forming an arbitrary transistor 12B on the upper surface of the glass plate 12A. In the color filter manufacturing step S20, the color filter substrate 14 is manufactured. The color filter substrate 14 is manufactured by forming a colored layer 14B of R (red), G (green), and B (blue) on the upper surface of the glass plate 14A.

  Next, in alignment film formation step S30, alignment films 12C and 14C are formed on the upper surfaces of the transistors 12B of the array substrate 12 and the colored layer 14B of the color filter substrate 14, respectively. Next, in the spacer forming step S40, the spacer 18 to be disposed between the array substrate 12 and the color filter substrate 14 is formed. Next, in the liquid crystal encapsulation / sealing step S50, the alignment film 12C of the array substrate 12 and the alignment film 14C of the color filter substrate 14 are disposed so as to face each other and close to each other. Liquid crystal 16 is sealed in a gap formed between the two. Then, the liquid crystal 16 is sealed by being sealed by the seal member 20. Thereby, the liquid crystal panel 10 to be inspected is manufactured. In this embodiment, the cell manufacturing process S60 is composed of the alignment film forming process S30, the spacer forming process S40, and the liquid crystal sealing / sealing process S50. In this regard, as shown in FIG. 7, the polarizing plate pasting step is deleted in the cell manufacturing step S <b> 60 of the present embodiment as compared with the cell manufacturing step S <b> 260 of the prior art that included the polarizing plate pasting step. It has become a simple process.

  Next, in the lighting inspection step S70, a lighting inspection is performed using the liquid crystal panel 10 obtained in the cell manufacturing step S60. That is, it is set so that the array substrate 12 side of the liquid crystal panel 10 is close to the front of the backlight 32, and the liquid crystal panel 10 is irradiated with light from the backlight 32. As described above, the light from the backlight 32 is applied to the liquid crystal panel 10 in a state where the polarization is adjusted. The light applied to the liquid crystal panel 10 is transmitted in the order of the array substrate 12, the liquid crystal 16, and the color filter substrate 14 of the liquid crystal panel 10.

  The operator visually inspects the liquid crystal panel 10 from the color filter substrate 14 side of the liquid crystal panel 10. In the visual inspection, it is confirmed whether or not the liquid crystal panel 10 has defects (defects) such as scratches, dust, and luminance spots. At this time, as shown in FIG. 4, the mark A displayed on the polarizing plate 32 </ b> B of the backlight 32 is transmitted through the liquid crystal panel 10 and displayed on the liquid crystal panel 10. Then, when defects (defects) such as scratches, dust, luminance spots, etc. are confirmed on the liquid crystal panel 10, the operator operates the operation unit 38 to move the mark A to be located at the defect position, By aligning (overlapping) the mark A with the defect position and confirming the defect position, the defect position is input and stored in the control main body 40, and information (type, position, size) of the defect is displayed on the display unit. 36. The mark A is displayed on the backlight 32, but the light indicating the mark A is transmitted through the liquid crystal panel 10 so that it can be visually recognized by the operator. Further, the type of defect (for example, scratch, dust, luminance spot, etc.) is classified into input buttons or input information according to type in the operation unit 38, and the operator inputs an input button or input corresponding to the type of defect. It can be easily specified by inputting information. Furthermore, the defect information stored in the control main body 40 is made connectable to other communication devices and shared. In addition, when the type or position of the defect is biased toward a predetermined defect, a production line for manufacturing the defective part of the liquid crystal panel 10 can be specified, and the specified production line is appropriately maintained. Thus, it is possible to prevent defects that may occur thereafter.

  If no defect is found as a result of the lighting inspection in the lighting inspection step S70, polarizing plates are respectively attached to the surface of the array substrate 12 and the surface of the color filter substrate 14 of the liquid crystal panel 10 in the polarizing plate attaching step S80. Attached. Thereafter, the liquid crystal panel 10 is sent to another process through the driver mounting process S90.

  On the other hand, if a defect is found as a result of the lighting inspection in the lighting inspection step S70, the defect (defective) of the liquid crystal panel 10 is repaired (corrected) in the defect correcting step S100. When the lighting inspection is performed in the relighting inspection step S110 and the defect is repaired (corrected), the polarizing plate is attached in the polarizing plate attaching step S80. Thereafter, the liquid crystal panel 10 is sent to another process through the driver mounting process S90.

  As described above, according to the liquid crystal panel inspection method using the liquid crystal panel inspection apparatus 30 of the present embodiment, the lighting inspection of the liquid crystal panel 10 is performed in a state where the polarizing plate is not attached to the liquid crystal panel 10. When a defect (defect) is confirmed in the liquid crystal panel 10 in the lighting inspection, the defect (defect) can be repaired (corrected) without peeling off the polarizing plate. Thereby, the process which peels a polarizing plate can be skipped, and the effort which repairs a defect is reduced. Moreover, since the polarizing plate located in the defective part is not discarded, it is possible to prevent the polarizing plate from being wasted, and the manufacturing cost of the liquid crystal panel 10 is reduced.

  In addition, a visual inspection by a person is performed in the lighting inspection, but unlike the method in which the operator stores the defect position as in the conventional technique, the type, position, and degree of the defect are controlled via the operation unit 38. Therefore, accurate information regarding the defect can be easily recorded. Further, since there is no need to mark the defect position on the liquid crystal panel as in the prior art, it is possible to prevent the marking from being forgotten to be erased or a new defect (defect) from occurring due to the marking.

  In addition, accurate information on defects can be made into a database, and by effectively utilizing data on defects, it is possible to reduce the work burden on the operator and shorten the lighting inspection time, In addition, the inspection accuracy can be increased. Further, by reviewing the production line based on the stored defect data, it can be used for defect analysis, yield improvement and quality control of the liquid crystal panel 10 and its components.

  In addition, since the liquid crystal panel inspection apparatus 30 of the present embodiment includes the backlight 32 and the control device 34, the inspection apparatus itself can be prevented from becoming large and complicated, and the introduction cost of the inspection apparatus is high. Can also be prevented.

  In the present embodiment, the configuration in which the color filter substrate 14 and the array substrate 12 are attached to the liquid crystal panel 10 to be inspected for lighting is shown. However, the present invention is not limited to this configuration. A lighting test may be performed on a liquid crystal panel composed of only an array substrate (no color filter substrate). Thereby, even when a defect is confirmed, the color filter substrate is not wasted and becomes more economical. A lighting test may be performed on a liquid crystal panel composed of only a liquid crystal and a color filter substrate (no array substrate). Thereby, even when a defect is confirmed, the array substrate is not wasted and it becomes more economical. In addition, a lighting test may be performed on a liquid crystal panel in which liquid crystal is simply sealed between two glass substrates. Thereby, even when a defect is confirmed, both the color filter substrate and the array substrate are not wasted, and it becomes more economical. Furthermore, a lighting test may be performed in a state where a polarizing plate is attached only to the color filter substrate and a polarizing plate is not attached to the Ares substrate with respect to a liquid crystal panel composed of a liquid crystal, an array substrate, and a color filter substrate. .

It is the block diagram which showed the structure of the liquid crystal panel test | inspected with the liquid crystal panel test | inspection apparatus which concerns on one Embodiment of this invention. It is the block diagram which showed the structure of the liquid crystal panel test | inspection apparatus which concerns on one Embodiment of this invention. It is the block diagram which showed the structure of the backlight used for the liquid crystal panel test | inspection apparatus which concerns on one Embodiment of this invention. It is explanatory drawing which showed the state which the mark displayed on the backlight of the liquid crystal panel test | inspection apparatus which concerns on one Embodiment of this invention permeate | transmits a liquid crystal panel, and is displayed on the liquid crystal panel. It is process drawing which showed the manufacturing process of the liquid crystal panel used as the test object of the liquid crystal panel inspection apparatus which concerns on one Embodiment of this invention, an inspection process, and a defect correction process. It is the block diagram which showed the structure of the liquid crystal panel test | inspected with the conventional liquid crystal panel test | inspection apparatus. It is process drawing which showed the manufacturing process, inspection process, and defect correction process of the liquid crystal panel used as the test object of the conventional liquid crystal panel inspection apparatus.

Explanation of symbols

10 Liquid crystal panel 12 Array substrate (glass substrate)
14 Color filter substrate (glass substrate)
16 Liquid crystal 30 Liquid crystal panel inspection device 32 Backlight (light emitting part)
32A Light source (backlight)
32B Polarizing plate (polarizing part, backlight)
38 Operation section 40 Control body section (control section)

Claims (4)

A liquid crystal panel inspection device that inspects a liquid crystal panel configured by enclosing liquid crystal in a glass substrate and irradiating light,
A light source that emits light;
A polarizing unit that polarizes light from the light source unit and irradiates the liquid crystal panel;
A liquid crystal panel inspection apparatus comprising: A control unit that causes the polarizing unit to display an arbitrary mark that can be transmitted through the liquid crystal panel;
An operation unit for moving the mark to the position of the defect on the liquid crystal panel and determining the position of the mark;
Have
The liquid crystal panel inspection apparatus according to claim 1, wherein the position of the mark determined by the operation unit is input to the control unit. A liquid crystal panel inspection method for irradiating and inspecting a liquid crystal panel configured by enclosing liquid crystal in a glass substrate,
A light irradiation step of irradiating the liquid crystal panel with polarized light from the light emitting unit;
A defect inspection step for inspecting the presence or absence of defects in the liquid crystal panel based on the light that has been applied to the liquid crystal panel and transmitted through the liquid crystal panel;
A liquid crystal panel inspection method comprising: An operation of transmitting an arbitrary mark displayed on the light emitting unit to the liquid crystal panel, and moving the mark on the liquid crystal panel to a defective part of the liquid crystal panel by an operation unit to specify the position of the defect on the liquid crystal panel Process,
An input step of inputting the position of the defect of the liquid crystal panel specified by the operation unit to the control unit;
The liquid crystal panel inspection method according to claim 3, further comprising:

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