JP2012223722A - Method and device for coating liquid, and manufacturing method of lighting device - Google Patents

Method and device for coating liquid, and manufacturing method of lighting device Download PDF

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JP2012223722A
JP2012223722A JP2011094539A JP2011094539A JP2012223722A JP 2012223722 A JP2012223722 A JP 2012223722A JP 2011094539 A JP2011094539 A JP 2011094539A JP 2011094539 A JP2011094539 A JP 2011094539A JP 2012223722 A JP2012223722 A JP 2012223722A
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application
liquid
coating
light
guide plate
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Takeshi Funaki
毅 舩木
Yasuhiro Sakamoto
泰宏 坂本
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Sharp Corp
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Sharp Corp
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Abstract

PROBLEM TO BE SOLVED: To accurately apply coating liquid having a low boiling point and low viscosity to a coated region of a member to be coated.SOLUTION: A liquid coating device which includes a tank 51 for storing coating liquid, a coating member 56 for applying the coating liquid to a divided member 30a (a member to be coated) and a valve 55 for opening and closing a supply path of the coating liquid from the tank 51 to the coating member 56, wherein the coating liquid is supplied from the tank 51 to the coating member 56 and impregnated with the coating member 56 by the supply path to be an open position while the coating member 56 is separated from the divided member 30a, the coating liquid is stopped supplying to the coating member by the supply path to be a close position, and then the coating member 56 and the divided member 30a are touched to apply one part of the coating liquid impregnated with the coating member 56 to the divided member 30a.

Description

本発明は、被塗布部材に対して液体を塗布する液体塗布方法、液体塗布装置、および上記液体塗布方法を用いた照明装置の製造方法に関するものである。   The present invention relates to a liquid application method for applying a liquid to a member to be applied, a liquid application device, and a method for manufacturing an illumination device using the liquid application method.

従来、液体を被塗布部材に塗布するための液体塗布装置として、上記液体を貯蔵する容器内の圧力を負圧に保ち、容器内の圧力(負圧)と液体の自重とのバランスによって容器からの液体の吐出量を制御する液体塗布装置が知られている。   Conventionally, as a liquid application device for applying a liquid to a member to be applied, the pressure in the container for storing the liquid is maintained at a negative pressure, and the container is separated from the container by a balance between the pressure in the container (negative pressure) and the weight of the liquid. There is known a liquid application apparatus that controls the amount of liquid discharged.

また、容器と被塗布部材に対して液体を吐出する吐出部との間にバルブを設け、このバルブの開閉を制御することにより被塗布部材に対する上記液体の塗布量を制御する技術が知られている(例えば特許文献1参照)。   Further, a technique is known in which a valve is provided between a container and a discharge unit that discharges liquid to a member to be coated, and the amount of liquid applied to the member to be coated is controlled by controlling the opening and closing of the valve. (For example, refer to Patent Document 1).

特開平2−122858号公報(平成2年5月10日公開)Japanese Patent Laid-Open No. 2-122858 (published on May 10, 1990)

しかしながら、上記の従来技術では、被塗布部材に塗布する液体が低沸点・低粘度である場合に、以下に示す(1),(2)の理由から、塗布量を適切に制御することが困難であるという問題がある。
(1)被塗布部材に塗布する液体が低沸点である場合、容器内における液体の蒸発のために容器内の圧力を適切に制御することが困難であり、容器から吐出される液体の量を精密に制御することができない。
(2)被塗布部材に塗布する液体が低粘度である場合、バルブの開閉によって塗布量を制御する構成では、バルブを開いた時に液体が多量に吐出されてしまうため、塗布量を適切に制御することが困難である。
However, in the above prior art, when the liquid applied to the member to be coated has a low boiling point and low viscosity, it is difficult to appropriately control the coating amount for the following reasons (1) and (2). There is a problem that.
(1) When the liquid applied to the member to be coated has a low boiling point, it is difficult to appropriately control the pressure in the container for the evaporation of the liquid in the container, and the amount of liquid discharged from the container is reduced. It cannot be controlled precisely.
(2) When the liquid to be applied to the member to be applied has a low viscosity, in the configuration in which the application amount is controlled by opening and closing the valve, a large amount of liquid is discharged when the valve is opened. Difficult to do.

なお、被塗布部材に塗布する液体が低沸点である場合、容器内における液体の溶媒が蒸発するため、当該液体の濃度を適切に管理することが困難であるという問題もある。   In addition, when the liquid apply | coated to a to-be-coated member is a low boiling point, since the solvent of the liquid in a container evaporates, there also exists a problem that it is difficult to manage the density | concentration of the said liquid appropriately.

本発明は、上記従来の問題点に鑑みなされたものであって、その目的は、低沸点・低粘度の塗布液を被塗布部材の被塗布領域に対して正確に塗布することにある。   The present invention has been made in view of the above-described conventional problems, and an object thereof is to accurately apply a low-boiling-point / low-viscosity coating solution to a coating region of a coating member.

本発明の液体塗布方法は、液体塗布装置を用いて被塗布部材における被塗布領域に塗布液を塗布する液体塗布方法であって、上記液体塗布装置は、上記塗布液を貯蔵する貯蔵部と、上記被塗布領域に当接して上記塗布液を上記被塗布領域に塗布する塗布部材と、上記貯蔵部から上記塗布部材に上記塗布液を供給するための供給路と、上記供給路を開状態と閉状態とに切り替えるバルブとを備えており、上記塗布部材を上記被塗布部材から離間させた状態で上記バルブにより上記供給路を開状態とすることで上記貯蔵部から上記塗布部材に上記塗布液を供給し、上記塗布液を上記塗布部材に含浸させる補給工程と、上記補給工程の後、上記バルブにより上記供給路を閉状態とすることで上記貯蔵部から上記塗布部材への上記塗布液の供給を遮断する補給停止工程と、上記補給停止工程の後、上記塗布部材と上記被塗布部材の上記被塗布領域とを当接させて上記塗布部材に含浸している上記塗布液の一部を上記被塗布領域に塗布する塗布工程とを含むことを特徴としている。   The liquid application method of the present invention is a liquid application method for applying a coating liquid to an area to be coated in a member to be coated using a liquid coating apparatus, wherein the liquid coating apparatus includes a storage unit that stores the coating liquid; An application member that contacts the application area and applies the application liquid to the application area, a supply path for supplying the application liquid from the storage unit to the application member, and an open state of the supply path A valve that switches to a closed state, and the supply liquid is opened from the storage unit to the application member by opening the supply path with the valve in a state where the application member is separated from the application target member. And after the replenishment step, the supply path is closed by the valve to close the supply liquid from the storage unit to the application member. Shut off supply After the replenishment stop step and the replenishment stop step, a part of the coating liquid impregnated in the coating member by bringing the coating member into contact with the coated region of the coated member is applied And an application step of applying to the region.

上記の方法によれば、上記補給工程におけるバルブの開閉タイミングを制御することにより、例えば塗布液の粘度が比較的低い場合であっても、塗布部材に供給する塗布液の量を正確に制御することができる。また、上記の方法によれば、塗布部材による塗布液の保持力は、塗布液の沸点の影響をほとんど受けず、また塗布液の粘度が低い場合であっても安定している。このため、塗布部材から被塗布部材への塗布液の塗布量は、塗布部材に含浸して保持されている塗布液の量と、塗布部材と被塗布部材との当接状態(押し当て量)と、塗布部材と被塗布部材における被塗布領域との当接時間とに応じて決まる。したがって、上記の方法によれば、塗布部材と被塗布部材との当接状態と、塗布部材と被塗布部材における塗布領域との当接時間と、および塗布部材に対する塗布液の供給量を調整することにより、塗布液が低沸点・低粘度の場合であっても、被塗布領域に対して適切な量の塗布液を正確に塗布し、被塗布領域の外部に塗布液が塗布されてしまうことを防止することができる。   According to the above method, by controlling the opening / closing timing of the valve in the replenishment step, for example, even when the viscosity of the coating liquid is relatively low, the amount of the coating liquid supplied to the coating member is accurately controlled. be able to. Further, according to the above method, the holding power of the coating solution by the coating member is hardly affected by the boiling point of the coating solution, and is stable even when the viscosity of the coating solution is low. For this reason, the application amount of the application liquid from the application member to the application member is determined by the amount of the application liquid impregnated in the application member and the contact state between the application member and the application member (pressing amount). And the contact time between the application member and the application region of the application member. Therefore, according to the above method, the contact state between the coating member and the member to be coated, the contact time between the coating member and the coating region on the member to be coated, and the supply amount of the coating liquid to the coating member are adjusted. As a result, even when the coating liquid has a low boiling point and low viscosity, an appropriate amount of the coating liquid is accurately applied to the coated area, and the coating liquid is applied to the outside of the coated area. Can be prevented.

また、上記液体塗布装置は、上記被塗布部材と上記塗布部材との相対位置を変化させるように上記被塗布部材および上記塗布部材の少なくとも一方を移動させる搬送部を備えており、上記塗布工程では、上記被塗布部材における上記被塗布領域を有する平面に対する上記塗布部材の配置位置の相対高さが上記移動中に一定となり、かつ上記被塗布領域の各部と上記塗布部材との当接時間が当該各部に対して目標塗布量の上記塗布液を塗布することのできる当接時間になるように上記搬送部の動作を制御する構成としてもよい。   The liquid coating apparatus includes a transport unit that moves at least one of the coated member and the coating member so as to change a relative position between the coated member and the coating member. The relative height of the arrangement position of the application member with respect to the plane having the application region in the application member is constant during the movement, and the contact time between each part of the application region and the application member is It is good also as a structure which controls the operation | movement of the said conveyance part so that it may become the contact time which can apply | coat the said application liquid of the target application quantity with respect to each part.

上記の方法によれば、被塗布領域の各部に対する塗布液の塗布量を、容易かつ適切に制御することができる。   According to said method, the application quantity of the coating liquid with respect to each part of a to-be-coated area | region can be controlled easily and appropriately.

また、上記被塗布部材は複数の分割部材を互いに隣接するように配置したものであり、上記塗布工程よりも前に、上記分割部材における他の分割部材との対向面に上記塗布液に対する撥液性を有する材料を塗布または貼付する撥液処理工程を行うようにしてもよい。   Further, the member to be coated is formed by arranging a plurality of divided members so as to be adjacent to each other, and before the coating step, the surface of the divided member facing the other divided member is repellent to the coating liquid. You may make it perform the liquid-repellent treatment process which apply | coats or sticks the material which has property.

上記の方法によれば、分割部材同士の隣接部の近傍に塗布した塗布液が毛管現象等によって分割部材同士の間隙に吸い込まれることを防止できる。   According to said method, it can prevent that the coating liquid apply | coated to the vicinity of the adjacent part of division members is suck | inhaled by the gap between division members by a capillary phenomenon etc.

本発明の液体塗布装置は、被塗布部材における被塗布領域に塗布液を塗布するための液体塗布装置であって、上記塗布液を貯蔵する貯蔵部と、上記被塗布領域に当接して上記塗布液を上記被塗布領域に塗布する塗布部材と、上記貯蔵部から上記塗布部材に上記塗布液を供給するための供給路と、上記供給路を開状態と閉状態とに切り替えるバルブと、上記被塗布部材と上記塗布部材との相対位置を変化させるように上記被塗布部材および上記塗布部材の少なくとも一方を移動させる搬送部と、上記バルブおよび上記搬送部の動作を制御する制御部とを備え、上記制御部は、上記塗布部材を上記被塗布部材から離間させた状態で上記バルブにより上記供給路を開状態とすることで上記貯蔵部から上記塗布部材に上記塗布液を供給させ、上記塗布液を上記塗布部材に含浸させる補給処理と、上記補給処理の後、上記バルブにより上記供給路を閉状態とすることで上記貯蔵部から上記塗布部材への上記塗布液の供給を遮断する補給停止処理と、上記補給停止処理の後、上記塗布部材と上記被塗布部材の上記被塗布領域とを当接させて上記塗布部材に含浸している上記塗布液の一部を上記被塗布領域に塗布させる塗布処理とを行うように上記バルブおよび上記搬送部の動作を制御することを特徴としている。   The liquid coating apparatus of the present invention is a liquid coating apparatus for coating a coating liquid on a coated area of a coated member, the storage section storing the coating liquid, and the coating in contact with the coated area An application member for applying a liquid to the application area, a supply path for supplying the application liquid from the storage unit to the application member, a valve for switching the supply path between an open state and a closed state, A transport unit that moves at least one of the coated member and the coating member so as to change a relative position between the coating member and the coating member; and a control unit that controls operations of the valve and the transport unit. The controller is configured to supply the application liquid from the storage unit to the application member by opening the supply path with the valve in a state where the application member is separated from the application member, and to apply the application. Replenishment processing for impregnating the coating member, and replenishment stop processing for shutting off the supply of the coating liquid from the storage unit to the coating member by closing the supply path by the valve after the replenishment processing. And after the replenishment stop process, the application member and the application area of the application member are brought into contact with each other to apply a part of the application liquid impregnated in the application member to the application area. The operation of the valve and the transport unit is controlled so as to perform the coating process.

上記の構成によれば、上記補給処理におけるバルブの開閉タイミングを制御することにより、例えば塗布液の粘度が比較的低い場合であっても、塗布部材に供給する塗布液の量を正確に制御することができる。また、上記の構成によれば、塗布部材による塗布液の保持力は、塗布液の沸点の影響をほとんど受けず、また塗布液の粘度が低い場合であっても安定している。このため、塗布部材から被塗布部材への塗布液の塗布量は、塗布部材に含浸して保持されている塗布液の量と、塗布部材と被塗布部材との当接状態(押し当て量)と、塗布部材と被塗布部材における被塗布領域との当接時間とに応じて決まる。したがって、上記の構成によれば、塗布部材と被塗布部材との当接状態と、塗布部材と被塗布部材における塗布領域との当接時間と、および塗布部材に対する塗布液の供給量を調整することにより、塗布液が低沸点・低粘度の場合であっても、被塗布領域に対して適切な量の塗布液を正確に塗布し、被塗布領域の外部に塗布液が塗布されてしまうことを防止することができる。   According to the above configuration, by controlling the opening / closing timing of the valve in the replenishment process, for example, even when the viscosity of the coating liquid is relatively low, the amount of the coating liquid supplied to the coating member is accurately controlled. be able to. Moreover, according to said structure, the retention strength of the coating liquid by an application | coating member is hardly influenced by the boiling point of a coating liquid, and is stable even when the viscosity of a coating liquid is low. For this reason, the application amount of the application liquid from the application member to the application member is determined by the amount of the application liquid impregnated in the application member and the contact state between the application member and the application member (pressing amount). And the contact time between the application member and the application region of the application member. Therefore, according to said structure, the contact state of a coating member and a to-be-coated member, the contact time of the coating member and the coating area | region in a to-be-coated member, and the supply amount of the coating liquid with respect to a coating member are adjusted. As a result, even when the coating liquid has a low boiling point and low viscosity, an appropriate amount of the coating liquid is accurately applied to the coated area, and the coating liquid is applied to the outside of the coated area. Can be prevented.

また、本発明の照明装置の製造方法は、指向性を有する光を出射する光源を有する光源ユニットと、上記光源ユニットから入射する光を面内方向に伝播させる平板状の導光板とを備え、上記導光板の平板面のうちの一方の面である平板表面から出射される光を用いて照明を行う照明装置の製造方法であって、上記光源ユニットは、上記光源から出射された光を上記導光板に入射させるための光結合部材を備え、かつ上記導光板の平板面のうちの他方の面である平板裏面側に配置されており、上記光結合部材は、上記光源から出射された光を、当該光が上記導光板の平板裏面側から入射し、上記導光板における平板表面において全反射して上記導光板内を上記面内方向に伝播するように上記導光板に入射させるものであり、上記光結合部材と上記導光板とを接着させる接着工程を含み、上記接着工程は、上記光結合部材における上記導光板との対向領域、および上記導光板における上記光結合部材との対向領域のうちの少なくとも一方に、上記したいずれかの液体塗布方法を用いて赤外線吸収材を含有する塗布液を塗布する塗布工程と、上記光結合部材と上記導光板とを上記赤外線吸収材を介して当接させる工程と、上記光結合部材と上記導光板とを上記赤外線吸収材を介して当接させた状態で上記赤外線吸収材に赤外線を照射し、上記赤外線吸収材に赤外線を吸収させて発熱させることにより、上記光結合部材および上記導光板の少なくとも一方の表面を溶融させて上記光結合部材と上記導光板とを接着させる工程とを含むことを特徴としている。   Further, the manufacturing method of the lighting device of the present invention includes a light source unit having a light source that emits light having directivity, and a flat light guide plate that propagates light incident from the light source unit in an in-plane direction, A method of manufacturing an illuminating device that performs illumination using light emitted from a flat plate surface that is one of flat plate surfaces of the light guide plate, wherein the light source unit emits light emitted from the light source as described above. A light coupling member for entering the light guide plate is provided, and the light coupling member is disposed on a flat plate rear surface side which is the other of the flat plate surfaces of the light guide plate, and the light coupling member emits light emitted from the light source. Is incident on the light guide plate so that the light enters from the flat plate back side of the light guide plate and is totally reflected on the flat plate surface of the light guide plate and propagates in the light guide plate in the in-plane direction. And above optical coupling member An adhesion step for adhering the light guide plate, wherein the adhesion step includes at least one of a region facing the light coupling plate in the light coupling member and a region facing the light coupling member in the light guide plate. A coating step of applying a coating solution containing an infrared absorbing material using any one of the liquid coating methods, a step of bringing the optical coupling member and the light guide plate into contact with each other via the infrared absorbing material, and the light By irradiating the infrared ray absorbing material with infrared rays in a state where the coupling member and the light guide plate are in contact with each other through the infrared ray absorbing material, the infrared ray absorbing material absorbs the infrared rays to generate heat, thereby generating the optical coupling member. And a step of melting at least one surface of the light guide plate to bond the optical coupling member and the light guide plate.

上記の方法によれば、上記光結合部材における上記導光板との対向領域、および上記導光板における上記光結合部材との対向領域のうちの少なくとも一方に対して塗布液を正確に塗布することができる。したがって、上記対向領域以外の領域に塗布液が塗布されることにより、当該塗布液が視認されるなどして照明装置の品位が低下することを防止できる。   According to said method, a coating liquid can be correctly apply | coated to at least one of the opposing area | region with the said light coupling plate in the said optical coupling member, and the opposing area | region with the said optical coupling member in the said light coupling plate. it can. Therefore, it can prevent that the quality of an illuminating device falls by applying a coating liquid to area | regions other than the said opposing area | region by visually recognizing the said coating liquid.

以上のように、本発明の液体塗布方法は、上記塗布部材を上記被塗布部材から離間させた状態で上記バルブにより上記供給路を開状態とすることで上記貯蔵部から上記塗布部材に上記塗布液を供給し、上記塗布液を上記塗布部材に含浸させる補給工程と、上記補給工程の後、上記バルブにより上記供給路を閉状態とすることで上記貯蔵部から上記塗布部材への上記塗布液の供給を遮断する補給停止工程と、上記補給停止工程の後、上記塗布部材と上記被塗布部材の上記被塗布領域とを当接させて上記塗布部材に含浸している上記塗布液の一部を上記被塗布領域に塗布する塗布工程とを含む。   As described above, in the liquid application method of the present invention, the application member is applied from the storage unit to the application member by opening the supply path with the valve while the application member is separated from the application target member. Supplying the liquid and impregnating the coating member with the coating liquid; and after the replenishing process, the supply path is closed by the valve so that the coating liquid is applied from the storage unit to the coating member. A part of the coating liquid impregnated in the coating member by bringing the coating member and the coated region of the coated member into contact with each other after the replenishment stopping step and the replenishment stopping step And a coating step of coating the coating region.

また、本発明の液体塗布装置は、上記塗布部材を上記被塗布部材から離間させた状態で上記バルブにより上記供給路を開状態とすることで上記貯蔵部から上記塗布部材に上記塗布液を供給させ、上記塗布液を上記塗布部材に含浸させる補給処理と、上記補給処理の後、上記バルブにより上記供給路を閉状態とすることで上記貯蔵部から上記塗布部材への上記塗布液の供給を遮断する補給停止処理と、上記補給停止処理の後、上記塗布部材と上記被塗布部材の上記被塗布領域とを当接させて上記塗布部材に含浸している上記塗布液の一部を上記被塗布領域に塗布させる塗布処理とを行う。   The liquid application apparatus of the present invention supplies the application liquid from the storage unit to the application member by opening the supply path with the valve while the application member is separated from the application target member. The supply liquid is impregnated into the application member, and after the supply process, the supply path is closed by the valve to supply the application liquid from the storage unit to the application member. After the replenishment stop process to be shut off and the replenishment stop process, a part of the coating liquid impregnated in the application member by bringing the application member and the application area of the application member into contact with each other is applied to the application target. A coating process for coating the coating region is performed.

それゆえ、本発明の液体塗布方法および液体塗布装置によれば、塗布液が低沸点・低粘度の場合であっても、被塗布領域に対して適切な量の塗布液を正確に塗布し、被塗布領域の外部に塗布液が塗布されてしまうことを防止することができる。   Therefore, according to the liquid coating method and the liquid coating apparatus of the present invention, even when the coating liquid has a low boiling point and low viscosity, an appropriate amount of the coating liquid is accurately applied to the area to be coated, It can prevent that a coating liquid will be apply | coated outside the to-be-coated area | region.

本発明の一実施形態にかかる液体塗布装置の構成を示す説明図である。It is explanatory drawing which shows the structure of the liquid coating device concerning one Embodiment of this invention. 本発明の一実施形態にかかる液晶表示装置の構成を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the liquid crystal display device concerning one Embodiment of this invention. 図2に示した液晶表示装置に備えられる光源モジュールの構成を示す斜視図である。It is a perspective view which shows the structure of the light source module with which the liquid crystal display device shown in FIG. 2 is equipped. 図2に示した液晶表示装置の構成を示す断面図である。It is sectional drawing which shows the structure of the liquid crystal display device shown in FIG. (a)は図3に示した光源モジュールに備えられる光結合部材の断面図であり、(b)は(a)の図中に示したA部の拡大図である。(A) is sectional drawing of the optical coupling member with which the light source module shown in FIG. 3 is equipped, (b) is an enlarged view of the A section shown in the figure of (a). (a)は図3に示した光源モジュールに備えられる光結合部材の変形例の断面図であり、(b)は(a)の図中に示したB部の拡大図である。(A) is sectional drawing of the modification of the optical coupling member with which the light source module shown in FIG. 3 is equipped, (b) is an enlarged view of the B section shown in the figure of (a). 図3に示した光源モジュールに備えられる光結合部材を介して導光板に入射する光の光路を示す説明図である。It is explanatory drawing which shows the optical path of the light which injects into a light-guide plate through the optical coupling member with which the light source module shown in FIG. 3 is equipped. (a)は図2に示した液晶表示装置の正面図であり、(b)はその側面図である。(A) is the front view of the liquid crystal display device shown in FIG. 2, (b) is the side view. (a)は図2に示した液晶表示装置の側面図であり、(b)は図2に示した液晶表示装置において導光板から出射される光の高さ方向についての輝度分布を示すグラフである。(A) is a side view of the liquid crystal display device shown in FIG. 2, and (b) is a graph showing the luminance distribution in the height direction of light emitted from the light guide plate in the liquid crystal display device shown in FIG. is there. 図2に示した液晶表示装置の端部の構成を示す要部断面図である。It is principal part sectional drawing which shows the structure of the edge part of the liquid crystal display device shown in FIG. 図3に示した光源モジュールの要部の構成を示す説明図である。It is explanatory drawing which shows the structure of the principal part of the light source module shown in FIG. (a)〜(d)は、図3に示した光源モジュールに備えられる光結合部材に対する赤外線吸収材溶液の塗布工程を示す説明図である。(A)-(d) is explanatory drawing which shows the application | coating process of the infrared rays absorber solution with respect to the optical coupling member with which the light source module shown in FIG. 3 is equipped.

本発明の一実施形態について説明する。なお、本実施形態では、本発明を液晶表示装置の製造工程の一部に適用する場合について説明するが、本発明の適用対象はこれに限定されるものではない。   An embodiment of the present invention will be described. In the present embodiment, the case where the present invention is applied to a part of the manufacturing process of the liquid crystal display device will be described, but the application target of the present invention is not limited to this.

(1−1.液晶表示装置1の全体構成)
図2は、本実施形態にかかる液晶表示装置(電子機器)1の構成を示す分解斜視図である。この図に示すように、液晶表示装置1は、背面側(表示面の反対側)から順に、バックライト10、拡散シート2、プリズムシート3、液晶パネル4、およびベゼル5を備えている。また、バックライト10は、背面側から順に、光源モジュール20、帯状の開口11aを有するシャーシ11、シャーシ11と同様に帯状の開口を有する反射シート12、および導光板13を備えている。
(1-1. Overall Configuration of Liquid Crystal Display Device 1)
FIG. 2 is an exploded perspective view showing the configuration of the liquid crystal display device (electronic device) 1 according to the present embodiment. As shown in this figure, the liquid crystal display device 1 includes a backlight 10, a diffusion sheet 2, a prism sheet 3, a liquid crystal panel 4, and a bezel 5 in order from the back side (the side opposite to the display surface). Further, the backlight 10 includes a light source module 20, a chassis 11 having a strip-shaped opening 11 a, a reflection sheet 12 having a strip-shaped opening similarly to the chassis 11, and a light guide plate 13 in order from the back side.

図3は光源モジュール20の斜視図であり、図4は液晶表示装置1の断面図である。これら各図に示すように、光源モジュール20は、光源ホルダー21、ヒートシンク22、LEDチップ23a・23b、LED基板24a・24b、スペーサ25a・25b、および光結合部材(結合レンズ)30を備えている。   FIG. 3 is a perspective view of the light source module 20, and FIG. 4 is a cross-sectional view of the liquid crystal display device 1. As shown in each of these drawings, the light source module 20 includes a light source holder 21, a heat sink 22, LED chips 23a and 23b, LED substrates 24a and 24b, spacers 25a and 25b, and an optical coupling member (coupling lens) 30. .

光源ホルダー21は、一方向に延伸する帯状の部材であり、延伸方向に垂直な断面が略コの字型である凹部を有している。また、上記凹部の底部には、LEDチップ23a・23bおよびLED基板24a・24bによって生じる熱を吸収するための板状のヒートシンク22が設けられている。   The light source holder 21 is a band-shaped member extending in one direction, and has a recess whose cross section perpendicular to the extending direction is substantially U-shaped. Further, a plate-shaped heat sink 22 for absorbing heat generated by the LED chips 23a and 23b and the LED substrates 24a and 24b is provided at the bottom of the recess.

また、ヒートシンク22上には、LED基板24a・24bが設けられており、LED基板24a・24b上には光源としての半導体のLED(Light Emitting Diode:発光ダイオード)チップ23a・23bが光源モジュール20の延伸方向に沿って配置されている。   Further, LED boards 24 a and 24 b are provided on the heat sink 22, and semiconductor LED (Light Emitting Diode) chips 23 a and 23 b as light sources are provided on the LED boards 24 a and 24 b of the light source module 20. It arrange | positions along the extending | stretching direction.

LED基板24a・24bは、LEDチップ23a・23bに供給する電流量を制御することにより、LEDチップ23a・23bの発光のON/OFFおよび発光量を制御するための制御回路や配線等(いずれも図示せず)を備えた基板であり、光源モジュール20の延伸方向に平行な方向に延伸するように配置されている。   The LED boards 24a and 24b control the amount of current supplied to the LED chips 23a and 23b, thereby controlling ON / OFF of the light emission of the LED chips 23a and 23b and the light emission amount. (Not shown), and is arranged to extend in a direction parallel to the extending direction of the light source module 20.

上記LEDチップ23a・23bは、光源モジュール20の延伸方向に沿って2列に並んで互いに平行に複数個設けられていると共に、これら複数のLEDチップ23a・23bの表面側には光結合部材30が設けられている。   A plurality of the LED chips 23a and 23b are provided in parallel to each other in two rows along the extending direction of the light source module 20, and the light coupling member 30 is provided on the surface side of the plurality of LED chips 23a and 23b. Is provided.

また、LED基板24a・24bと光結合部材30との間には、LEDチップ23a・23bに加えて、LED基板24a・24bと光結合部材30との間に隙間を設けるためのスペーサ25a・25bが形成されている。この隙間により、光結合部材30がLEDチップ23a・23bに当接して、LEDチップ23a・23bが破損することを防止できる。ただし、これに限られず、LEDチップ23a・23bに損傷を与えない範囲であれば、LEDチップ23a・23bが光結合部材30と密着していても構わない。なお、半導体のLEDチップは非常に微細なサイズであるため、図3では、図面の煩雑さを防ぐためLEDチップの記載を省略している。   In addition to the LED chips 23a and 23b, spacers 25a and 25b for providing a gap between the LED boards 24a and 24b and the optical coupling member 30 are provided between the LED boards 24a and 24b and the optical coupling member 30. Is formed. Due to this gap, it is possible to prevent the light coupling member 30 from coming into contact with the LED chips 23a and 23b and damaging the LED chips 23a and 23b. However, the present invention is not limited to this, and the LED chips 23 a and 23 b may be in close contact with the optical coupling member 30 as long as the LED chips 23 a and 23 b are not damaged. Since the semiconductor LED chip has a very fine size, the description of the LED chip is omitted in FIG. 3 in order to prevent the drawing from being complicated.

また、本実施形態では、光源としてLEDチップを用いているが、これは、半導体チップ状のLEDは形状が小さくかつ狭い領域に配置できるためである。例えば、安価な低出力のLEDチップを用いた場合であっても、間隔を詰めて多くのLEDを配置することで照度を向上させ、高機能のバックライトの光源として利用できる。ただし、これに限るものではなく、例えば、パッケージに収納されたLEDを光源として用いてもよく、有機EL発光素子、あるいは無機EL発光素子などを光源として用いてもよい。   In this embodiment, an LED chip is used as the light source. This is because the semiconductor chip-shaped LED has a small shape and can be arranged in a narrow area. For example, even when an inexpensive low-power LED chip is used, the illuminance can be improved by arranging a large number of LEDs at close intervals, and the LED chip can be used as a light source for a highly functional backlight. However, the present invention is not limited to this. For example, an LED housed in a package may be used as a light source, and an organic EL light emitting element or an inorganic EL light emitting element may be used as a light source.

光結合部材(光結合部材)30は、各LEDチップ23a・23bから出射される光を、導光板13に対して所定角度範囲(導光板13の背面側(基板裏面側)から入射して導光板13の発光面側(基板表面側)に到達した光がこの発光面側で全反射する角度範囲)で導光板13に入射するように導光板13の内部へに導くためのものであり、光源モジュール20の延伸方向に平行な方向に延伸するように配置されている。   The optical coupling member (optical coupling member) 30 guides the light emitted from the LED chips 23a and 23b by entering the light guide plate 13 from a predetermined angle range (the back side of the light guide plate 13 (the back side of the substrate)). The light that has reached the light emitting surface side (substrate surface side) of the light plate 13 is guided to the inside of the light guide plate 13 so as to be incident on the light guide plate 13 in an angle range in which the light is totally reflected on the light emitting surface side. It arrange | positions so that it may extend | stretch in the direction parallel to the extending | stretching direction of the light source module 20. FIG.

なお、光結合部材30の材質は、当該光結合部材30の内部を光が伝播可能であり、光源から入射した光を導光板13に対して上記所定角度範囲で入射させるように光の進行方向を変化させることができるものであれば特に限定されるものではないが、例えば導光板13と同様の樹脂材料を用いることができる。本実施形態では光結合部材30としてアクリル樹脂からなるものを用いた。また、光結合部材30は延伸方向に沿って並べられた複数の分割部材30a(図3,4では図示せず)からなり、それら各分割部材30aが導光板13に接着されている。各分割部材の導光板13に対する接着方法については後述する。   The material of the optical coupling member 30 is such that light can propagate through the optical coupling member 30, and the traveling direction of the light so that the light incident from the light source is incident on the light guide plate 13 within the predetermined angle range. The resin material is not particularly limited as long as it can be changed. For example, the same resin material as that of the light guide plate 13 can be used. In this embodiment, an optical coupling member 30 made of acrylic resin is used. The optical coupling member 30 is composed of a plurality of divided members 30 a (not shown in FIGS. 3 and 4) arranged along the extending direction, and these divided members 30 a are bonded to the light guide plate 13. A method of bonding each divided member to the light guide plate 13 will be described later.

図5(a)は光結合部材30における延伸方向に垂直な断面の構成を示す説明図である。この図に示すように、光結合部材30における延伸方向に垂直な断面は、略楕円形状からなるリングの一部を直線状に切断して得られる平坦部33・33と、上記の略楕円形状の外周部の一部を平坦部33・33と略平行な直線に沿って切り欠いて得られる平坦部31とを有する形状である。本実施形態では、平坦部31の幅(光結合部材30の延伸方向に垂直な方向の幅)は5mmに設定されている。なお、平坦部33・33の間には上記リングの中空部分に相当する中空部が設けられている。すなわち、平坦部33・33は上記リングの内周面34によって接続されている。   FIG. 5A is an explanatory diagram showing a configuration of a cross section perpendicular to the extending direction in the optical coupling member 30. As shown in this figure, the cross section perpendicular to the extending direction of the optical coupling member 30 has flat portions 33 and 33 obtained by cutting a part of a substantially elliptical ring in a straight line, and the substantially elliptical shape described above. This is a shape having a flat portion 31 obtained by cutting out a part of the outer periphery of the flat portion 33 along a straight line substantially parallel to the flat portions 33. In the present embodiment, the width of the flat portion 31 (the width in the direction perpendicular to the extending direction of the optical coupling member 30) is set to 5 mm. A hollow portion corresponding to the hollow portion of the ring is provided between the flat portions 33 and 33. That is, the flat portions 33 and 33 are connected by the inner peripheral surface 34 of the ring.

図5(b)は図5(a)に示したA部の拡大図である。図5(a)および図5(b)に示したように、光結合部材30の平坦部33・33に近接する位置には、LEDチップ23a・23bが配置されている。これら各LEDチップ23a・23bは、図5(b)に示す全反射面32・32の焦点位置Fよりも光結合部材30の外周面側(平坦部33・33における全反射面32・32に近い側)に対向する位置に配置されている。   FIG.5 (b) is an enlarged view of the A section shown to Fig.5 (a). As shown in FIGS. 5A and 5B, LED chips 23 a and 23 b are arranged at positions close to the flat portions 33 and 33 of the optical coupling member 30. These LED chips 23a and 23b are arranged on the outer peripheral surface side of the optical coupling member 30 with respect to the focal position F of the total reflection surfaces 32 and 32 shown in FIG. 5B (the total reflection surfaces 32 and 32 in the flat portions 33 and 33). It is arranged at a position facing the near side.

これにより、図5(a)および図5(b)に示すように、各LEDチップ23a・23bから出射された光は光結合部材30の全反射面32・32で全反射(略全反射)し、その反射光が平坦部31を介して導光板13に入射する。また、全反射面32・32の形状は、各LEDチップ23a・23bからの入射光を、導光板13に対して上記所定角度範囲で入射させることができるように設定されている。上記のように光結合部材30を介して導光板13の背面側から導光板13に入射した光は、図7に示すように、導光板13の発光面側で全反射して導光板13内を面内方向に伝播する。   As a result, as shown in FIGS. 5A and 5B, the light emitted from the LED chips 23a and 23b is totally reflected by the total reflection surfaces 32 and 32 of the optical coupling member 30 (substantially total reflection). Then, the reflected light enters the light guide plate 13 via the flat portion 31. The shapes of the total reflection surfaces 32 and 32 are set so that incident light from the LED chips 23a and 23b can be incident on the light guide plate 13 in the predetermined angle range. As described above, the light incident on the light guide plate 13 from the back side of the light guide plate 13 through the light coupling member 30 is totally reflected on the light emitting surface side of the light guide plate 13 as shown in FIG. Is propagated in the in-plane direction.

なお、光結合部材30の延伸方向に垂直な断面における全反射面32・32の形状は、必ずしも楕円の円弧形状に限るものではなく、LEDチップ23a・23bから入射された光を全反射面32・32で全反射(略全反射)させて導光板13に対して所定角度範囲で入射させることができる形状であればよい。例えば、全反射面32・32は、光結合部材30の延伸方向に垂直な断面の形状が円の円弧形状、弓形、放物線形状などの曲線形状であってもよく、平坦部31、33・33に対して傾斜した直線状であってもよい。   In addition, the shape of the total reflection surfaces 32 and 32 in the cross section perpendicular to the extending direction of the optical coupling member 30 is not necessarily limited to the elliptical arc shape, and the light incident from the LED chips 23a and 23b is reflected on the total reflection surface 32. Any shape that can be totally reflected (substantially totally reflected) by 32 and incident on the light guide plate 13 within a predetermined angle range may be used. For example, the total reflection surfaces 32 and 32 may have a curved shape such as a circular arc shape, a bow shape, or a parabola shape in a cross section perpendicular to the extending direction of the optical coupling member 30, and the flat portions 31, 33, and 33. It may be a straight line inclined with respect to.

図6(a)は光結合部材30の変形例を示す説明図であり、光結合部材30の全反射面32・32における当該光結合部材30の延伸方向に垂直な断面の形状を放物線形状にした場合の例を示している。   FIG. 6A is an explanatory view showing a modification of the optical coupling member 30. The shape of the cross section perpendicular to the extending direction of the optical coupling member 30 on the total reflection surfaces 32 and 32 of the optical coupling member 30 is made a parabolic shape. An example is shown.

また、本実施形態では、光結合部材30における延伸方向に垂直な断面の形状が、平坦部33・33間に中空部(内周面34)を有する形状であるものとしたが、これに限らず、円柱形状の一部を切り欠いた形状としてもよい。すなわち、平坦部33・33間に中空部を有さず、これら両平坦部が直線状に繋がっている形状としてもよい。   In the present embodiment, the shape of the cross section perpendicular to the extending direction of the optical coupling member 30 is a shape having a hollow portion (inner peripheral surface 34) between the flat portions 33 and 33, but is not limited thereto. It is good also as a shape which notched some cylindrical shapes. That is, it is good also as a shape which does not have a hollow part between the flat parts 33 and 33, and these both flat parts are connected with linear form.

また、全反射面32・32の周囲に、光結合部材30から外部に漏れる光を光結合部材30内に戻すための反射シート(図示せず)を設けてもよい。これにより、LEDチップ23a・23bから照射された光の一部が全反射面32・32から光結合部材30の外部に漏洩する場合であっても、光結合部材30の外部に漏洩する光を光結合部材30に戻し、導光板13に入射する光の光量を増加させて光利用効率をより高くすることができる。   Further, a reflection sheet (not shown) for returning light leaking from the optical coupling member 30 to the outside into the optical coupling member 30 may be provided around the total reflection surfaces 32 and 32. Thereby, even when a part of the light emitted from the LED chips 23a and 23b leaks from the total reflection surfaces 32 and 32 to the outside of the optical coupling member 30, the light leaking to the outside of the optical coupling member 30 is emitted. Returning to the optical coupling member 30, the light utilization efficiency can be further increased by increasing the amount of light incident on the light guide plate 13.

導光板13は、当該導光板13の内部を光が伝播可能な導光性を有する材質からなる平板状の部材である。導光板13の材質は、導光性を有するものであれば特に限定されるものではなく、例えば従来から公知の樹脂材料などを用いることができる。本実施形態では、導光板13としてアクリル樹脂からなるものを用いた。   The light guide plate 13 is a flat plate member made of a light guide material capable of transmitting light through the light guide plate 13. The material of the light guide plate 13 is not particularly limited as long as it has a light guide property. For example, a conventionally known resin material can be used. In the present embodiment, the light guide plate 13 made of acrylic resin is used.

また、導光板13における光結合部材30側の面(背面)または光結合部材30とは反対側の面(おもて面)の少なくとも一方には、導光板13内を伝播する光を散乱させて当該導光板13の発光面側から出射させるための多数のドットパターン(光散乱部)が設けられている。ドットパターンの形成方法は特に限定されるものではなく、従来から公知の方法で形成することができる。例えば、光拡散反射性を有する材料を導光板13における一方または両方の面に印刷することによって形成してもよく、レーザ加工等により導光板13の一部を加工することによって形成してもよい。また、本実施形態では光散乱部としてドットパターンを形成しているが、これに限らず、導光板13内を伝播する光の一部を散乱させて導光板13における発光面側から出射させることができるものであればよい。また、各ドットパターンの配置(サイズおよび配置ピッチ)についても特に限定されるものではなく、バックライト10の発光面から出射される光の輝度分布を所望する輝度分布にできるように適宜配置すればよい。   In addition, light propagating in the light guide plate 13 is scattered on at least one of the light coupling member 30 side surface (back surface) or the surface opposite to the light coupling member 30 (front surface) in the light guide plate 13. A large number of dot patterns (light scattering portions) for emitting light from the light emitting surface side of the light guide plate 13 are provided. The method for forming the dot pattern is not particularly limited, and can be formed by a conventionally known method. For example, the light-diffusing reflective material may be formed by printing on one or both surfaces of the light guide plate 13 or may be formed by processing a part of the light guide plate 13 by laser processing or the like. . In this embodiment, the dot pattern is formed as the light scattering portion. However, the present invention is not limited to this, and a part of the light propagating in the light guide plate 13 is scattered and emitted from the light emitting surface side of the light guide plate 13. Anything that can do. Further, the arrangement (size and arrangement pitch) of each dot pattern is not particularly limited, and may be appropriately arranged so that the luminance distribution of light emitted from the light emitting surface of the backlight 10 can be a desired luminance distribution. Good.

図8(a)は液晶表示装置1の正面図であり、図8(b)はその側面図である。なお、図8(a)に示した一点鎖線は光源モジュール20の配置位置を示している。また、図9(a)は液晶表示装置1の側面図であり、図9(b)は導光板13から液晶パネル4側に出射される光の輝度分布を示している。このように、液晶表示装置1では、導光板13から液晶パネル4側に出射される光の輝度分布は、光源モジュール20の直上の領域が最も輝度が高く、光源モジュール20からの距離が長くなるほど輝度が低くなっており、液晶表示装置1を適切に表示するための輝度分布に一致している。   FIG. 8A is a front view of the liquid crystal display device 1, and FIG. 8B is a side view thereof. In addition, the dashed-dotted line shown to Fig.8 (a) has shown the arrangement position of the light source module 20. FIG. 9A is a side view of the liquid crystal display device 1, and FIG. 9B shows the luminance distribution of light emitted from the light guide plate 13 to the liquid crystal panel 4 side. As described above, in the liquid crystal display device 1, the luminance distribution of the light emitted from the light guide plate 13 toward the liquid crystal panel 4 has the highest luminance in the region immediately above the light source module 20, and the longer the distance from the light source module 20 is. The luminance is low and matches the luminance distribution for displaying the liquid crystal display device 1 appropriately.

また、本実施形態のバックライト10では、導光板13の背面側からLEDチップ23a・23bの導光板13に光を入射させる。これにより、従来のサイドエッジ型のバックライトの光利用効率が75%程度であったのに対して、本実施形態ではバックライト10の光利用効率を88%にまで向上させることができる。また、本実施形態のバックライト10では、従来のサイドエッジ型のバックライトとは異なり、図10に示すように、液晶パネル4の端部に光源が存在しないので、液晶パネル4の端部に近接する位置にフレーム6を設けることができる。その結果、額縁寸法を6mm以下にすることができる。   Moreover, in the backlight 10 of this embodiment, light is incident on the light guide plate 13 of the LED chips 23 a and 23 b from the back side of the light guide plate 13. As a result, the light utilization efficiency of the conventional side edge type backlight is about 75%, whereas in this embodiment, the light utilization efficiency of the backlight 10 can be improved to 88%. Further, in the backlight 10 of the present embodiment, unlike the conventional side edge type backlight, as shown in FIG. 10, there is no light source at the end of the liquid crystal panel 4. The frame 6 can be provided at a close position. As a result, the frame size can be 6 mm or less.

ところで、図8に示したように、光源モジュール20は、液晶表示装置1の画面中央部を横切って設けられるため、画面幅とほぼ同じ長さ(本実施形態では約1380mm)を有している。このため、当然ながら、光結合部材30についても上記画面幅とほぼ同じ長さを有している。   By the way, as shown in FIG. 8, the light source module 20 is provided across the center of the screen of the liquid crystal display device 1, and thus has substantially the same length as the screen width (about 1380 mm in this embodiment). . Therefore, as a matter of course, the optical coupling member 30 also has substantially the same length as the screen width.

このような長尺の光結合部材30を単一の長尺部材として形成する場合、精度よく形成することが困難であり、また製造コストが高くなるという問題がある。すなわち、光結合部材30の製造方法としては、押し出し成形による製造方法や、金型成形による製造方法が考えられるが、それぞれの方法において以下のような問題がある。まず、押し出し成形は、アクリル樹脂等の透明樹脂を用いて長尺な光学部品を安価に製造することができるが、高精度な加工が困難である。また、金型成形は、大型な(長尺な)部材の成形を行う場合には、金型内部の熱的ひずみなどによってその精度が低下する。さらに、大型な(長尺な)部材を成形する場合には金型のコストが特に高くなり、製造コストが増大する。   When such a long optical coupling member 30 is formed as a single long member, there is a problem that it is difficult to form with high accuracy and the manufacturing cost increases. That is, as a manufacturing method of the optical coupling member 30, a manufacturing method by extrusion molding or a manufacturing method by mold molding can be considered, but each method has the following problems. First, extrusion molding can produce a long optical component at low cost using a transparent resin such as an acrylic resin, but high-precision processing is difficult. In addition, when molding a large (long) member, the accuracy of mold molding is reduced due to thermal strain inside the mold. Further, when a large (long) member is molded, the cost of the mold is particularly high, and the manufacturing cost increases.

そこで、本実施形態のバックライト10では、高精度に形成された光結合部材30を低コストに供給するため、光結合部材30を単一の長尺部材として形成するのではなく、一方向に延伸する部材を延伸方向に沿って複数並べて配置することによって光結合部材30を形成している。すなわち、光結合部材30は、延伸方向に沿って並べられた複数(本実施形態では12個)の分割部材からなる。本実施形態では、これら各分割部材を金型成形にて形成した。このように金型成形を適用することで各分割部材を高精度に形成できる。また、光結合部材30を複数の分割部材に分割して製造することにより、大きな金型を必要とせず、金型コストを大幅に低減できるため、製造コストを安価に抑えられる。   Therefore, in the backlight 10 of the present embodiment, in order to supply the optical coupling member 30 formed with high accuracy at a low cost, the optical coupling member 30 is not formed as a single long member, but in one direction. The optical coupling member 30 is formed by arranging a plurality of members to be stretched side by side along the stretching direction. That is, the optical coupling member 30 is composed of a plurality of (in this embodiment, 12) divided members arranged along the extending direction. In this embodiment, each of these divided members is formed by molding. In this way, each divided member can be formed with high accuracy by applying mold forming. Further, by manufacturing the optical coupling member 30 by dividing it into a plurality of divided members, a large mold is not required and the mold cost can be greatly reduced, so that the manufacturing cost can be kept low.

上記各分割部材を正確に位置合わせするためには、分割部材同士を位置合わせした上で接合することが考えられるが、分割部材同士を正確に接合することは実際には困難である。すなわち、分割部材同士を接合する方法としては、光学用接着剤を用いて接着する方法、またはレーザ溶着による方法が考えられる。しかしながら、光学用接着剤を用いて接着する方法では、分割部材の接合端面に接着剤を塗布してから接合する端面同士を接触させるが、接触後の接着剤の硬化が速いため、光結合部材同士を位置合わせするための微調整が困難である。また、レーザ溶着による方法は、部材の長手方向の端面同士を接合しようとする場合、その接合面にレーザを照射することが困難であり、この方法を適用することができない。   In order to accurately align each of the divided members, it can be considered that the divided members are aligned and then joined, but it is actually difficult to join the divided members accurately. That is, as a method of joining the divided members, a method of bonding using an optical adhesive or a method of laser welding can be considered. However, in the method of bonding using an optical adhesive, the end surfaces to be bonded are brought into contact with each other after the adhesive is applied to the bonding end surfaces of the divided members. Fine adjustment to align each other is difficult. Further, in the method by laser welding, when joining the end faces in the longitudinal direction of the members, it is difficult to irradiate the joining surfaces with laser, and this method cannot be applied.

このため、本実施形態のバックライト10では、以下の手法によって光結合部材30における各分割部材の高精度の位置合わせを実現している。この手法を、図11(a)を参照して説明する。   For this reason, in the backlight 10 of this embodiment, the highly accurate alignment of each division | segmentation member in the optical coupling member 30 is implement | achieved with the following methods. This method will be described with reference to FIG.

図11(a)に示すように、光結合部材30は延伸方向に複数に分割されている。ここでは、分割された各部材を分割部材30aとする。なお、本実施形態では、光結合部材30を延伸方向に沿って12個の分割部材30aに分割しているが、図11(a)ではこのうちの一部のみを描いている。上述したように、光結合部材30の長さは画面幅とほぼ同じ約1380mmであり、各分割部材30aの長さはこれを12等分した約115mmである。   As shown to Fig.11 (a), the optical coupling member 30 is divided | segmented into multiple in the extending | stretching direction. Here, each divided member is referred to as a divided member 30a. In the present embodiment, the optical coupling member 30 is divided into 12 divided members 30a along the extending direction, but only a part of them is illustrated in FIG. As described above, the length of the optical coupling member 30 is approximately 1380 mm, which is substantially the same as the screen width, and the length of each divided member 30a is approximately 115 mm, which is divided into 12 equal parts.

なお、隣接する分割部材30a同士は、その延伸方向の端面同士を対向させて配置されるが、この端面同士は接合しない。代わりに、各分割部材30aは、導光板13との接触面において導光板13に接着される。すなわち、各分割部材30aにおける平坦部(頂部平坦面)31と導光板13とが接着される。各分割部材30aが導光板13に対して精度良く位置合わせされていれば、分割部材30a同士についても高精度の位置合わせが達成される。導光板13と光結合部材30(各分割部材30a)との接着方法については後述する。   In addition, although the adjacent division members 30a are arrange | positioned with the end surfaces of the extending direction facing each other, these end surfaces are not joined. Instead, each divided member 30 a is bonded to the light guide plate 13 at the contact surface with the light guide plate 13. That is, the flat part (top flat surface) 31 and the light guide plate 13 in each divided member 30a are bonded. If each division member 30a is aligned with respect to the light guide plate 13 with high accuracy, high-precision alignment is also achieved with respect to the division members 30a. A method of bonding the light guide plate 13 and the optical coupling member 30 (each divided member 30a) will be described later.

また、本実施形態のバックライト10では、LED基板24a・24bおよびヒートシンク22も分割部材30aに合わせて分割されている。各LED基板24a・24bおよび各ヒートシンク22は、分割部材30aに対してビス留めされる。具体的には、各LED基板24a・24bおよび各ヒートシンク22に、分割部材30aの延伸方向を長軸とする長穴からなるビス穴を設け、このビス穴を介してビス留めする。これにより、LED基板24a・24bおよびヒートシンク22は、光結合部材30の延伸方向に対して上記長穴分の可動域を有することになる。光結合部材30および導光板13は、アクリル樹脂等の透明樹脂にて形成されるため、熱による膨張が生じやすいが、上記構成によりLED基板24a・24bおよびヒートシンク22が可動することによって熱膨張による歪みを防止できる。図11(b)は、光結合部材30(各分割部材30a)および導光板13に熱膨張が生じている場合の様子を示す説明図である。   In the backlight 10 of the present embodiment, the LED boards 24a and 24b and the heat sink 22 are also divided according to the dividing member 30a. The LED boards 24a and 24b and the heat sinks 22 are screwed to the dividing member 30a. Specifically, each LED board 24a, 24b and each heat sink 22 is provided with a screw hole made of a long hole whose major axis is the extending direction of the dividing member 30a, and is screwed through the screw hole. As a result, the LED substrates 24 a and 24 b and the heat sink 22 have a movable range corresponding to the elongated hole with respect to the extending direction of the optical coupling member 30. Since the optical coupling member 30 and the light guide plate 13 are formed of a transparent resin such as an acrylic resin, expansion due to heat is likely to occur. However, due to the above configuration, the LED substrates 24a and 24b and the heat sink 22 are moved, thereby causing thermal expansion. Distortion can be prevented. FIG. 11B is an explanatory diagram showing a state where thermal expansion occurs in the optical coupling member 30 (each divided member 30 a) and the light guide plate 13.

また、本実施形態では、各分割部材30aを導光板13に接着する際、隣接する分割部材30a同士にほとんど隙間を設けないように各分割部材30aを配置している。ただし、各分割部材30a同士は接合していないので、各分割部材30a同士の間には微小な間隙(約0.1mm〜約0.5mm程度の隙間)が生じている。ただし、分割部材30a間に隙間が生じていたとしても、分割部材30aを通過した光はさらに導光板13内を伝播してから液晶パネル4側へ出射される。このため、導光板13における光拡散作用によって、分割部材30a間の継ぎ目は視認されにくくなり、特に問題とならない。   Moreover, in this embodiment, when each division member 30a is adhere | attached on the light-guide plate 13, each division member 30a is arrange | positioned so that a clearance gap may not be provided between adjacent division members 30a. However, since the divided members 30a are not joined to each other, a minute gap (a gap of about 0.1 mm to about 0.5 mm) is generated between the divided members 30a. However, even if there is a gap between the split members 30a, the light that has passed through the split member 30a is further propagated through the light guide plate 13 and then emitted to the liquid crystal panel 4 side. For this reason, the joint between the divided members 30a becomes difficult to be visually recognized due to the light diffusion action in the light guide plate 13, and there is no particular problem.

(1−2.光結合部材30と導光板13との接着方法)
次に、光結合部材30を構成する各分割部材30aと導光板13との接着方法について説明する。
(1-2. Adhesion method between optical coupling member 30 and light guide plate 13)
Next, a method for bonding each divided member 30a constituting the optical coupling member 30 and the light guide plate 13 will be described.

本実施形態では、光結合部材30を構成する各分割部材30aにおける導光板13との当接面、すなわち図5(a)に示した平坦部(頂部平坦面)31に赤外線吸収材溶液を塗布し、各分割部材30aと導光板13とを当接させた状態でこれら両部材の当接部に赤外線を照射する。これにより、赤外線吸収材溶液に含まれる赤外線吸収材が赤外線を吸収して発熱し、光結合部材30(各分割部材30a)および導光板13の表面が溶融して各分割部材30aと導光板13とが接合される。   In the present embodiment, the infrared absorbing material solution is applied to the contact surface of each divided member 30a constituting the optical coupling member 30 with the light guide plate 13, that is, the flat portion (top flat surface) 31 shown in FIG. Then, in a state where the divided members 30a and the light guide plate 13 are in contact with each other, the contact portions of these both members are irradiated with infrared rays. As a result, the infrared absorbing material contained in the infrared absorbing material solution absorbs infrared rays to generate heat, and the surfaces of the optical coupling member 30 (each divided member 30a) and the light guide plate 13 are melted, and each divided member 30a and the light guide plate 13 are melted. And are joined.

また、本実施形態では、上記の赤外線吸収材溶液として、GENTEX社製のクリアウェルド(登録商標)を用いた。この赤外線吸収材溶液は、エタノール、アセトン、メチルエチルケトンなどからなる有機溶剤をベースとする液体中に赤外線を吸収する赤外線吸収材(色素微粒子)を分散させたものであり、沸点が78.5℃、粘度が2mPa・sの低沸点・低粘度の液体である。上記の有機溶剤はキャリアとして使用され、塗布後に蒸発し、赤外線吸収材(色素微粒子)が被塗布部材(各分割部材30a)の表面に残る。そして、赤外線吸収材を介して結合部材30(各分割部材30a)と導光板13とを当接させた状態で赤外線(レーザー波長940nmから1,064nmの範囲内のレーザ光)を照射することにより、赤外線吸収材が赤外線を吸収して発熱し、光結合部材30(各分割部材30a)および導光板13の表面が溶融して各分割部材30aと導光板13とが接合される。ただし、赤外線吸収材溶液の構成はこれに限るものではない。   In this embodiment, Clearweld (registered trademark) manufactured by GENTEX was used as the infrared absorbing material solution. This infrared absorbing material solution is a solution in which an infrared absorbing material (pigment fine particles) that absorbs infrared rays is dispersed in a liquid based on an organic solvent composed of ethanol, acetone, methyl ethyl ketone, etc., and has a boiling point of 78.5 ° C., A low boiling point and low viscosity liquid having a viscosity of 2 mPa · s. The above organic solvent is used as a carrier, evaporates after application, and an infrared absorbing material (pigment fine particles) remains on the surface of the member to be coated (each divided member 30a). Then, by irradiating infrared rays (laser light within a laser wavelength range of 940 nm to 1,064 nm) with the coupling member 30 (each divided member 30a) and the light guide plate 13 in contact with each other via an infrared absorbing material. The infrared absorbing material absorbs infrared rays to generate heat, the optical coupling member 30 (each divided member 30a) and the surface of the light guide plate 13 are melted, and each divided member 30a and the light guide plate 13 are joined. However, the configuration of the infrared absorbing material solution is not limited to this.

また、上記の赤外線吸収材溶液は、塗布前の液体状態では緑色を呈しているが、赤外線を照射して接着させた後は無色透明になる。このため、赤外線が照射される領域外に上記の赤外線吸収材溶液を塗布してしまうと、各分割部材30aと導光板13とを接着した後に赤外線が照射されずに緑色に呈色した領域が生じてしまい、液晶表示装置1の表示品位を低下させてしまう(色目に影響を与えてしまう)。特に、本実施形態にかかる光結合部材30(各分割部材30a)は、赤外線吸収材溶液の被塗布領域である平坦部31のサイズが各分割部材30aについて幅5mm×長さ115mmと非常に狭く、しかも平坦部31の両側が傾斜面(全反射面32・32)になっているので、低粘度の赤外線吸収材溶液がこれら各傾斜面に液ダレしやすい。また、全反射面32・32に赤外線吸収材溶液が塗布されてしまうと、光源から入射した光が全反射面32・32で適切に反射されず、光利用効率の低下を招来してしまう恐れがある。このため、赤外線吸収材溶液を被塗布部材である光結合部材30(各分割部材30a)の被塗布領域(平坦部31)に対して当該被塗布領域からはみ出すことなく適切に塗布することが求められる。そこで、本実施形態では、以下に説明する液体塗布装置50を用いて赤外線吸収材溶液の塗布を行う。   Moreover, although the said infrared absorber material solution is exhibiting green in the liquid state before application | coating, it becomes colorless and transparent after irradiating infrared rays and making it adhere | attach. For this reason, if the above infrared absorbing material solution is applied outside the region irradiated with infrared rays, there is a region that is colored green without being irradiated with infrared rays after bonding each divided member 30a and the light guide plate 13. As a result, the display quality of the liquid crystal display device 1 is deteriorated (the color is affected). In particular, in the optical coupling member 30 (each divided member 30a) according to the present embodiment, the size of the flat portion 31 that is a region to which the infrared absorbing material solution is applied is as narrow as 5 mm wide and 115 mm long with respect to each divided member 30a. In addition, since both sides of the flat portion 31 are inclined surfaces (total reflection surfaces 32 and 32), the low-viscosity infrared absorbing material solution is liable to be dripped onto these inclined surfaces. In addition, if the infrared absorbing material solution is applied to the total reflection surfaces 32 and 32, the light incident from the light source may not be properly reflected by the total reflection surfaces 32 and 32, and the light use efficiency may be reduced. There is. For this reason, it is calculated | required to apply | coat an infrared rays absorber material appropriately, without protruding from the said to-be-coated area | region with respect to the to-be-coated area | region (flat part 31) of the optical coupling member 30 (each division member 30a) which is a to-be-coated member. It is done. Therefore, in the present embodiment, the infrared absorbing material solution is applied using a liquid applying apparatus 50 described below.

図1は、各分割部材30aに対する赤外線吸収材溶液の塗布に用いる液体塗布装置50の構成を示す説明図である。この図に示すように、液体塗布装置50は、塗布液を貯蔵するタンク(貯蔵部)51と、タンク51内を加圧するためのポンプ(加圧手段)52と、ポンプ52によって加圧された空気をタンク51に供給するための加圧管(加圧手段)53と、タンク51から塗布液を供給するための供給管(供給路)54と、供給管54の管路を開閉するためのバルブ55と、供給管54の先端に接続され、塗布液を含浸した状態で被塗布部材に当接することにより被塗布部材に塗布液を塗布する塗布部材56と、被塗布部材(本実施形態では分割部材30aおよび後述するダミー塗布部材D)を塗布部材56に対して相対的に移動(走査)させる搬送装置57と、制御部58とを備えている。   FIG. 1 is an explanatory diagram showing a configuration of a liquid coating apparatus 50 used for coating an infrared absorbing material solution on each divided member 30a. As shown in this figure, the liquid coating apparatus 50 is pressurized by a tank (storage unit) 51 for storing the coating liquid, a pump (pressurizing means) 52 for pressurizing the inside of the tank 51, and the pump 52. A pressure pipe (pressure means) 53 for supplying air to the tank 51, a supply pipe (supply path) 54 for supplying the coating liquid from the tank 51, and a valve for opening and closing the supply pipe 54. 55, an application member 56 that is connected to the tip of the supply pipe 54 and is in contact with the member to be coated in a state impregnated with the coating solution, and a member to be coated (in this embodiment, divided) A conveyance device 57 that moves (scans) the member 30a and a dummy application member D), which will be described later, relative to the application member 56, and a control unit 58 are provided.

塗布部材(塗布液保持部材)56の構成は、タンク51から供給管54を介して供給(補給)される塗布液(赤外線吸収材溶液)を含浸した状態で保持するとともに、当該塗布部材56に被塗布部材を当接させることにより、この被塗布部材に対して含浸している塗布液の一部を塗布できるものであれば特に限定されるものではなく、例えば、刷毛、ブラシ、布、スポンジなどを用いることができる。また、塗布部材56の形状についても特に限定されるものではなく、被塗布部材における被塗布領域の形状に応じて適宜設定すればよい。本実施形態では、光結合部材30における各分割部材30aの被塗布領域の形状は幅5mm×長さ115mmであることから、塗布部材56における走査方向に垂直な方向の幅を5mmとした。   The configuration of the coating member (coating liquid holding member) 56 is to hold the coating liquid (infrared absorbing material solution) supplied (supplemented) from the tank 51 via the supply pipe 54 in an impregnated state. There is no particular limitation as long as a part of the coating liquid impregnated on the member to be coated can be applied by contacting the member to be coated. For example, a brush, a brush, a cloth, a sponge, etc. Etc. can be used. Further, the shape of the application member 56 is not particularly limited, and may be set as appropriate according to the shape of the application region in the application member. In this embodiment, since the shape of the application region of each divided member 30a in the optical coupling member 30 is 5 mm wide × 115 mm long, the width of the application member 56 in the direction perpendicular to the scanning direction is 5 mm.

制御部58は、ポンプ52の動作を制御するタンク圧制御部61と、バルブ55の動作を制御するバルブ制御部62と、搬送装置57の動作を制御する相対位置制御部63とを備えている。   The control unit 58 includes a tank pressure control unit 61 that controls the operation of the pump 52, a valve control unit 62 that controls the operation of the valve 55, and a relative position control unit 63 that controls the operation of the transport device 57. .

タンク圧制御部61は、タンク51から塗布部材56に塗布液を供給する際、ポンプ52を制御してタンク51内を加圧する。これにより、塗布液が低沸点の液体(例えば低級アルコール(化学式における炭素数が5以下のアルコール)等の水よりも沸点が低い液体を主成分とする液体)であっても、タンク51内の圧力が低下することによって蒸発量が増大してしまうことを防止することができる。なお、タンク51の加圧圧力は、塗布液の沸点や粘度、供給管54の開口面積などに応じて、タンク51内における塗布液の蒸発を抑制でき、かつタンク51から供給管54に適切な量の塗布液を排出できるように適宜設定すればよい。また、タンク51内の圧力を検知する圧力センサ(図示せず)を設け、その検知結果に応じてタンク圧制御部61がポンプ52の動作を制御するようにしてもよい。また、ポンプ52および加圧管53は必須の構成ではなく、例えば、タンク51内における塗布液の蒸発等を考慮する必要ない場合などには省略してもよい。また、ポンプ52および加圧管53を省略する場合、タンク51内が負圧(タンク51の周囲の気圧よりも低い圧力)にならないように、タンク51の周囲の空気をタンク51内に導入するための通気孔(図示せず)を設けてもよい。   The tank pressure control unit 61 pressurizes the tank 51 by controlling the pump 52 when supplying the coating liquid from the tank 51 to the coating member 56. As a result, even if the coating liquid is a low-boiling liquid (for example, a liquid whose main component is a liquid having a lower boiling point than water such as lower alcohol (alcohol having 5 or less carbon atoms in the chemical formula)), It is possible to prevent the evaporation amount from increasing due to the decrease in pressure. The pressurizing pressure of the tank 51 can suppress evaporation of the coating liquid in the tank 51 according to the boiling point and viscosity of the coating liquid, the opening area of the supply pipe 54, and the like, and is appropriate for the supply pipe 54 from the tank 51. What is necessary is just to set suitably so that the quantity of coating liquid can be discharged | emitted. Further, a pressure sensor (not shown) for detecting the pressure in the tank 51 may be provided, and the tank pressure control unit 61 may control the operation of the pump 52 according to the detection result. Further, the pump 52 and the pressurizing pipe 53 are not essential components, and may be omitted, for example, when it is not necessary to consider the evaporation of the coating liquid in the tank 51. Further, when the pump 52 and the pressurizing pipe 53 are omitted, the air around the tank 51 is introduced into the tank 51 so that the inside of the tank 51 does not become a negative pressure (pressure lower than the atmospheric pressure around the tank 51). Ventilation holes (not shown) may be provided.

バルブ制御部62は、タンク51から塗布部材56に塗布液を供給する処理を行う場合にバルブ55を開状態とし、その他の場合にはバルブ55を閉状態とする。なお、バルブ制御部62によってバルブ55が開状態とされる時間は、タンク51から塗布部材56への塗布液の供給量が塗布部材56の保持可能量を超えることがないように設定されている。これにより、塗布部材56の保持可能量を超えて塗布液が供給され、塗布部材56から余剰な塗布液が滴下してしまうことを防止している。   The valve control unit 62 opens the valve 55 when performing the process of supplying the coating liquid from the tank 51 to the coating member 56, and closes the valve 55 in other cases. The time for which the valve 55 is opened by the valve controller 62 is set so that the supply amount of the coating liquid from the tank 51 to the coating member 56 does not exceed the holdable amount of the coating member 56. . Thereby, the coating liquid is supplied beyond the amount that can be held by the coating member 56, and excessive coating liquid is prevented from dripping from the coating member 56.

相対位置制御部63は、搬送装置57の動作を制御し、被塗布部材(本実施形態では各分割部材30aおよび後述するダミー部材D)を塗布部材56に対して相対的に移動させる。具体的には、相対位置制御部63は、塗布部材56と被塗布部材の被塗布領域との当接状態(塗布部材56の被塗布部材に対する押し付け量あるいは押し付け力)および当接時間が、この被塗布領域に対する塗布液(赤外線吸収材溶液)の目標塗布量に応じた当接状態および当接時間になるように搬送装置57の動作を制御する。なお、搬送装置57の構成は特に限定されるものではなく、例えば、アクチュエータ、モーター、ギア等を組み合わせた従来から公知の搬送装置技術を用いることができる。また、本実施形態では搬送装置57が塗布対象物の位置を移動させるものとしているが、これに限らず、例えば塗布部材56を塗布対象物に対して相対的に移動させるようにしてもよく、塗布部材56および塗布対象物の両方を移動させることにより、これら両部材の相対位置を移動させるようにしてもよい。   The relative position control unit 63 controls the operation of the transport device 57 and moves the member to be coated (in this embodiment, each divided member 30 a and a dummy member D described later) relative to the coating member 56. Specifically, the relative position control unit 63 determines the contact state (the pressing amount or pressing force of the application member 56 against the application member) and the contact time between the application member 56 and the application region of the application member. The operation of the conveying device 57 is controlled so that the contact state and the contact time according to the target application amount of the coating liquid (infrared absorbing material solution) with respect to the application region are reached. In addition, the structure of the conveying apparatus 57 is not specifically limited, For example, the conventionally well-known conveying apparatus technique which combined the actuator, the motor, the gear, etc. can be used. In the present embodiment, the transport device 57 moves the position of the application target. However, the present invention is not limited to this. For example, the application member 56 may be moved relative to the application target. You may make it move the relative position of these both members by moving both the application member 56 and the application | coating target object.

図12(a)〜図12(d)は、分割部材30a・30aに対する赤外線吸収材溶液(塗布液)の塗布工程を示す説明図である。   12 (a) to 12 (d) are explanatory views showing the application process of the infrared absorbing material solution (coating liquid) to the divided members 30a and 30a.

まず、図12(a)に示すように、制御部58(バルブ制御部62)は、塗布部材56を被塗布部材から離間させた状態でバルブ55を開操作し、タンク51から塗布部材56に塗布液を供給(補給)する。この際、必要に応じて、制御部58(タンク圧制御部61)がポンプ52を制御し、タンク51内を加圧しておくようにしてもよい。なお、バルブ55を開状態とする時間は、上述したように、タンク51から塗布部材56への塗布液の供給量が塗布部材56の保持可能量を超えることがないように適宜設定しておけばよい。   First, as shown in FIG. 12A, the control unit 58 (valve control unit 62) opens the valve 55 in a state where the coating member 56 is separated from the member to be coated, so that the coating member 56 is moved from the tank 51 to the coating member 56. Supply (supplement) the coating solution. At this time, the control unit 58 (tank pressure control unit 61) may control the pump 52 to pressurize the tank 51 as necessary. As described above, the time for opening the valve 55 can be set appropriately so that the supply amount of the coating liquid from the tank 51 to the coating member 56 does not exceed the holdable amount of the coating member 56. That's fine.

塗布部材56に対して当該塗布部材56の保持可能量を超えない範囲の所定量(例えば、12個の分割部材30aからなる光結合部材30の全体に対する塗布液の塗布を塗布液の補給処理を行わずに行える量)の塗布液が供給されると、制御部58は、図12(b)に示すように、バルブ55を閉操作し、塗布部材56に対する塗布液の供給を停止する。   A predetermined amount within a range that does not exceed the amount that can be held by the coating member 56 (for example, the coating liquid is applied to the entire optical coupling member 30 including the twelve divided members 30a. When an amount of the coating liquid is supplied, the controller 58 closes the valve 55 and stops the supply of the coating liquid to the coating member 56, as shown in FIG.

次に、相対位置制御部63は、図12(c)に示すように、バルブ55を閉じた状態で塗布部材56をダミー部材Dに当接させ、塗布部材56に保持されている塗布液の一部(余剰塗布液)をダミー部材に移行させる。すなわち、塗布部材56に保持可能量の上限に近い量の塗布液を保持させた状態で塗布部材56を分割部材30aに当接させると、当接開始当初に分割部材30aに対して必要量以上の塗布液が付着してしまう場合がある。そこで、本実施形態では、塗布部材56への塗布液の供給(補給)を行った後、分割部材30aに塗布液を塗布する前に、塗布部材56をダミー部材Dに当接させて塗布液の一部を移行させる。これにより、塗布部材56に保持されている塗布液の量を調整し、塗布部材56と分割部材30aとの当接開始当初から適切な量の塗布液を塗布することができる。ダミー部材Dの構成は特に限定されるものではなく、例えば分割部材30aと同様の構成であってもよく、分割部材30aとは異なる構成であってもよい。本実施形態では、塗布部材56とダミー部材Dとを当接させた状態でダミー部材Dを塗布部材56に対して2cm〜3cm程度移動させることにより、上記の余剰塗布液の除去を行っている。なお、塗布部材56とダミー部材Dとの当接処理は必須ではなく、例えば塗布部材56と分割部材30aとの当接開始当初における余剰塗布液の分割部材30aへの移行を考慮する必要がない場合には省略してもよい。   Next, as shown in FIG. 12C, the relative position control unit 63 brings the application member 56 into contact with the dummy member D with the valve 55 closed, so that the application liquid held by the application member 56 is kept. A part (excess coating liquid) is transferred to the dummy member. That is, when the coating member 56 is brought into contact with the divided member 30a in a state where the coating liquid is held in an amount close to the upper limit of the holdable amount in the coating member 56, more than the necessary amount with respect to the divided member 30a at the beginning of contact. The coating liquid may adhere. Therefore, in the present embodiment, after supplying (replenishing) the coating liquid to the coating member 56 and before coating the coating liquid on the divided member 30a, the coating member 56 is brought into contact with the dummy member D to apply the coating liquid. A part of Thereby, the amount of the coating liquid held by the coating member 56 can be adjusted, and an appropriate amount of coating liquid can be applied from the beginning of the contact between the coating member 56 and the dividing member 30a. The structure of the dummy member D is not specifically limited, For example, the structure similar to the division member 30a may be sufficient, and the structure different from the division member 30a may be sufficient. In the present embodiment, the surplus coating liquid is removed by moving the dummy member D about 2 cm to 3 cm with respect to the coating member 56 while the coating member 56 and the dummy member D are in contact with each other. . The contact process between the application member 56 and the dummy member D is not essential. For example, it is not necessary to consider the transition of the excess coating liquid to the divided member 30a at the beginning of the contact between the application member 56 and the divided member 30a. In some cases, it may be omitted.

その後、相対位置制御部63は、図12(d)に示すように、バルブ55を閉じたままの状態で塗布部材56と分割部材30aとを当接させ、当接させたまま分割部材30aを塗布部材56に対して相対的に移動させることにより、分割部材30aにおける被塗布領域に塗布液を塗布していく。この際、図12(d)に示すように、連接配置される各分割部材30aを連接させた状態で塗布部材56に対して相対的に移動させ、各分割部材30aに対して塗布液を順次塗布していく。   Thereafter, as shown in FIG. 12 (d), the relative position control unit 63 brings the application member 56 and the divided member 30a into contact with the valve 55 being closed, and the divided member 30a is held in contact. By moving the coating member 56 relative to the coating member 56, the coating liquid is applied to the coated region in the divided member 30 a. At this time, as shown in FIG. 12 (d), the divided members 30a connected to each other are moved relative to the application member 56 in a state of being connected, and the coating liquid is sequentially applied to the divided members 30a. Apply.

なお、本実施形態では、被塗布部材(光結合部材30を構成する各分割部材30a)に対して赤外線吸収材溶液を塗布する際、被塗布部材を搬送装置57に設けられた治具に被塗布領域(被塗布部材における被塗布領域を含む平面である被塗布面)が移動方向に対して水平になるように固定するとともに、相対位置制御部63が、塗布部材56の被塗布領域(被塗布面)に対する相対高さを一定に保ちながら被塗布部材を塗布部材56に対して相対的に移動させるよう搬送装置57の動作を制御する。また、相対位置制御部63は、塗布部材56と被塗布部材の被塗布領域の各部との当接時間が、被塗布領域の各部に目標塗布量の塗布液(赤外線吸収材溶液)を塗布するための当接時間になるように搬送装置57の動作を制御する。   In this embodiment, when the infrared absorbing material solution is applied to the member to be coated (each divided member 30a constituting the optical coupling member 30), the member to be coated is placed on a jig provided in the transport device 57. The application area (the application surface that is the plane including the application area in the application member) is fixed so as to be horizontal with respect to the movement direction, and the relative position control unit 63 is configured to apply the application area (application area) of the application member 56. The operation of the conveying device 57 is controlled so as to move the member to be coated relative to the coating member 56 while keeping the relative height to the coating surface constant. Further, the relative position control unit 63 applies a target application amount of the application liquid (infrared absorbing material solution) to each part of the application region when the contact time between the application member 56 and each part of the application region of the application member. Therefore, the operation of the transport device 57 is controlled so that the contact time is reached.

また、連接配置される各分割部材30aを連接させた状態で塗布部材56に対して相対的に移動させる際、分割部材30a同士の連接部が塗布部材56との対向部を通過するときに塗布部材56と各分割部材30aとを離間させてもよい。すなわち、塗布部材56が分割部材30a同士の連接部に当接しないようにしてもよい。これにより、塗布液が分割部材30a同士の連接部に塗布されることを防止できる。   In addition, when the divided members 30 a that are connected are moved relative to the application member 56 in a state where the divided members 30 a are connected, the application is performed when the connection portion between the divided members 30 a passes through the portion facing the application member 56. The member 56 and each divided member 30a may be separated from each other. That is, the application member 56 may not be in contact with the connecting portion between the divided members 30a. Thereby, it can prevent that a coating liquid is apply | coated to the connection part of the division members 30a.

また、本実施形態では、図12(d)に示すように、隣接する分割部材30a同士の対向面のうち、少なくとも一方に、上記塗布液に対する撥液性(塗布液をはじく性質)を有する撥液性材料41を予め塗布あるいは貼付しておく。これにより、塗布液が分割部材30a同士の対向部(連接部)に移行し、光結合部材30中に塗布液によって着色された領域が生じてしまうといった不具合が生じることを防止できる。すなわち、分割部材30a同士の連接部の近傍に低粘度の塗布液を塗布した場合、この塗布液が毛管現象等によって分割部材30a同士の微小な間隙に移行してしまう場合があるが、上記対向面に撥液性材料41を塗布しておくことにより、上記間隙に塗布液が移行してしまうことを防止できる。上記の撥液性材料41は、分割部材30a同士の間隙に塗布液が毛管現象等によって浸透しようとする力よりも強い撥液力を実現できる材料であれば特に限定されるものではないが、例えばフッ素樹脂などを用いることができる。なお、撥液性材料41は、光結合部材30の性能に影響を及ぼさない(あるいは光結合部材30の性能に対する影響が少ない)ように、透明な材料であることがより好ましい。   In the present embodiment, as shown in FIG. 12D, at least one of the opposing surfaces of the adjacent divided members 30a has liquid repellency (property to repel the coating liquid) with respect to the coating liquid. The liquid material 41 is applied or pasted in advance. Thereby, it can prevent that the coating liquid transfers to the opposing part (connection part) of the division members 30a, and the malfunction that the area | region colored with the coating liquid arises in the optical coupling member 30 can arise. That is, when a low-viscosity coating liquid is applied in the vicinity of the connecting portion between the divided members 30a, the coating liquid may move to a minute gap between the divided members 30a due to a capillary phenomenon or the like. By applying the liquid repellent material 41 to the surface, it is possible to prevent the coating liquid from moving to the gap. The liquid repellent material 41 is not particularly limited as long as it is a material that can realize a liquid repellent force stronger than the force that the coating liquid tries to penetrate into the gap between the divided members 30a due to a capillary phenomenon or the like. For example, a fluororesin can be used. The liquid repellent material 41 is more preferably a transparent material so as not to affect the performance of the optical coupling member 30 (or to have little influence on the performance of the optical coupling member 30).

上記のように赤外線吸収材溶液を塗布した後、被塗布部材を搬送装置57に治具によって固定したままの状態で、赤外線吸収材溶液を塗布した被塗布部材の被塗布領域に導光板13を当接させ、当接させた状態で赤外線を照射することにより、赤外線吸収材溶液に含まれる赤外線吸収材を発熱させて光結合部材30を構成する各分割部材30aおよび導光板13の当接面を溶融させ、各分割部材30aと導光板13とを接着する。   After applying the infrared absorbing material solution as described above, the light guide plate 13 is applied to the coated region of the coated member to which the infrared absorbing material solution is coated while the coated member is fixed to the transport device 57 with a jig. The contact surfaces of the divided members 30a and the light guide plate 13 constituting the optical coupling member 30 by causing the infrared absorbing material contained in the infrared absorbing material solution to generate heat by irradiating infrared rays in the contacted state. Are melted, and the divided members 30a and the light guide plate 13 are bonded.

以上のように、本実施形態にかかる液体塗布装置50は、塗布液(赤外線吸収材溶液)を貯蔵するタンク51と、分割部材(被塗布部材)30aに塗布液を塗布する塗布部材56と、タンク51から塗布部材56への塗布液の供給路を開閉するバルブ55とを備え、塗布部材56を分割部材30aから離間させた状態で供給路を開状態とすることでタンク51から塗布部材56に塗布液を供給して塗布部材56に含浸させ、上記供給路を閉状態とすることで塗布部材への塗布液の供給を停止し、塗布液の供給を停止した後、塗布部材56と分割部材30aとを当接させて塗布部材56に含浸している塗布液の一部を分割部材30aに塗布する。   As described above, the liquid application device 50 according to the present embodiment includes the tank 51 that stores the application liquid (infrared absorbing material solution), the application member 56 that applies the application liquid to the divided member (object to be applied) 30a, And a valve 55 that opens and closes a supply path for supplying the coating liquid from the tank 51 to the coating member 56. The supply path is opened while the coating member 56 is separated from the dividing member 30a, so that the coating member 56 from the tank 51 is opened. The coating liquid is supplied to the coating member 56 and impregnated in the coating member 56, and the supply path is closed to stop the supply of the coating liquid to the coating member. A part of the coating liquid impregnated in the coating member 56 is applied to the divided member 30a by contacting the member 30a.

これにより、バルブ55の開閉タイミングを制御することにより、塗布液の粘度が低い場合であっても、塗布部材56に供給する塗布液の量を正確に制御することができる。また、塗布部材56による塗布液の保持力は、塗布液の沸点の影響をほとんど受けず、また塗布液の粘度が低い場合であっても安定している。このため、塗布部材56から分割部材30aへの塗布液の塗布量は、塗布部材56に含浸して保持されている塗布液の量と、塗布部材56と分割部材30aとの当接状態(押し当て量)と、塗布部材56と分割部材30aにおける被塗布領域との当接時間(走査速度)とに応じて決まる。したがって、これらの値を調整することにより、塗布液が低沸点・低粘度の場合であっても、分割部材30aの被塗布領域(平坦部31)に対して適切な量の塗布液を正確に塗布し、平坦部31以外の領域(全反射面32・32)に塗布液が塗布されてしまうことを防止することができる。   Thereby, by controlling the opening / closing timing of the valve 55, the amount of the coating liquid supplied to the coating member 56 can be accurately controlled even when the viscosity of the coating liquid is low. Further, the holding power of the coating solution by the coating member 56 is hardly affected by the boiling point of the coating solution, and is stable even when the viscosity of the coating solution is low. For this reason, the application amount of the application liquid from the application member 56 to the dividing member 30a is determined by the amount of the application liquid impregnated in the application member 56 and the contact state between the application member 56 and the division member 30a (pushing). The amount of contact) and the contact time (scanning speed) between the application member 56 and the application area of the divided member 30a. Therefore, by adjusting these values, even when the coating liquid has a low boiling point and low viscosity, an appropriate amount of coating liquid can be accurately applied to the coated region (flat portion 31) of the dividing member 30a. It can apply | coat and it can prevent that a coating liquid is apply | coated to area | regions (total reflection surface 32 * 32) other than the flat part 31. FIG.

また、本実施形態では、被塗布部材(光結合部材30を構成する各分割部材30a)に対して赤外線吸収材溶液を塗布する際、被塗布部材を搬送装置57に設けられた治具に被塗布領域が移動方向に対して水平になるように固定するとともに、相対位置制御部63が、塗布部材56の被塗布領域に対する相対高さを一定に保つように被塗布部材を塗布部材56に対して相対的に移動させるよう搬送装置57の動作を制御する。また、相対位置制御部63は、塗布部材56と被塗布部材の被塗布領域の各部との当接時間が、被塗布領域の各部に対して目標塗布量の塗布液(赤外線吸収材溶液)を塗布することができる当接時間になるように搬送装置57の動作を制御する。これにより、被塗布部材に対する塗布液の塗布量を容易かつ適切に制御することができる。   In this embodiment, when the infrared absorbing material solution is applied to the member to be coated (each divided member 30a constituting the optical coupling member 30), the member to be coated is placed on a jig provided in the transport device 57. The application region is fixed so that the application region is horizontal with respect to the moving direction, and the relative position control unit 63 holds the application member with respect to the application member 56 so that the relative height of the application member 56 with respect to the application region is kept constant. The operation of the transfer device 57 is controlled so as to be relatively moved. Further, the relative position control unit 63 has a contact time between the application member 56 and each part of the application region of the application member, and applies a target application amount of the application liquid (infrared absorbing material solution) to each part of the application region. The operation of the conveying device 57 is controlled so that the contact time during which application can be performed is reached. Thereby, the application quantity of the coating liquid with respect to a to-be-coated member can be controlled easily and appropriately.

また、本実施形態では、赤外線吸収材溶液を塗布した後、被塗布部材を搬送装置57に治具によって固定したままの状態で、赤外線吸収材溶液を塗布した被塗布部材の被塗布領域に導光板13を当接させ、当接させた状態で赤外線を照射することにより、赤外線吸収材を発熱させて光結合部材30を構成する各分割部材30aおよび導光板13の当接面を溶融させて接着する。これにより、光結合部材30を構成する各分割部材30aを導光板13に対して略均一な接着強度で適切に接着することができる。   In this embodiment, after the infrared absorbing material solution is applied, the coated member is guided to the coated region of the coated member to which the infrared absorbing material solution is applied while the coated member is fixed to the transport device 57 with a jig. By irradiating the optical plate 13 with the infrared rays in contact with the optical plate 13, the infrared absorbing material is heated to melt the contact surfaces of the divided members 30a and the light guide plate 13 constituting the optical coupling member 30. Glue. Thereby, each divided member 30 a constituting the optical coupling member 30 can be appropriately bonded to the light guide plate 13 with substantially uniform adhesive strength.

なお、本実施形態では、光結合部材30(各分割部材30a)における導光板13との当接部(平坦部31)に赤外線吸収材溶液を塗布するものとしたが、これに限らず、例えば導光板13における光結合部材30(各分割部材30a)との当接部に塗布してもよく、光結合部材30(各分割部材30a)における導光板13との当接部(平坦部31)と導光板13における光結合部材30(各分割部材30a)との当接部の両方に塗布してもよい。   In the present embodiment, the infrared absorbing material solution is applied to the contact portion (flat portion 31) with the light guide plate 13 in the optical coupling member 30 (each divided member 30a). You may apply | coat to the contact part with the optical coupling member 30 (each division member 30a) in the light-guide plate 13, and the contact part (flat part 31) with the light-guide plate 13 in the optical coupling member 30 (each division member 30a). The light guide plate 13 may be applied to both contact portions of the light coupling member 30 (each divided member 30a).

また、本実施形態では、塗布液が塗布される被塗布部材が液晶表示装置1のバックライト10に備えられる光結合部材30(各分割部材30a)である場合について説明したが、被塗布部材はこれに限るものでない。   Moreover, although this embodiment demonstrated the case where the to-be-coated member to which a coating liquid is apply | coated is the optical coupling member 30 (each division member 30a) with which the backlight 10 of the liquid crystal display device 1 is equipped, It is not limited to this.

また、塗布液についても、赤外線吸収材溶液に限るものではなく、塗布部材56に保持させることができるものであればよい。すなわち、本発明は、塗布部材56に保持させることができる程度の粘度を有する液体を被塗布部材に対して塗布する場合に適用でき、被塗布部材の構成は特に限定されない。なお、本実施形態にかかる液体塗布装置50および液体塗布方法は、上述したように、低沸点・低粘度の液体を被塗布部材に塗布する場合であっても塗布量を正確に制御できるという特性を有している。このため、実施形態にかかる液体塗布装置50および液体塗布方法は、例えば、化学式における炭素数が5以下のアルコールである低級アルコール等の低沸点・低濃度の液体を主成分とする液体の塗布に特に適している。   Further, the coating liquid is not limited to the infrared absorbing material solution, and any coating liquid that can be held by the coating member 56 may be used. That is, the present invention can be applied to a case where a liquid having a viscosity that can be held by the application member 56 is applied to the application member, and the configuration of the application member is not particularly limited. In addition, as described above, the liquid coating apparatus 50 and the liquid coating method according to the present embodiment have the characteristic that the coating amount can be accurately controlled even when a low boiling point / low viscosity liquid is coated on the coated member. have. For this reason, the liquid application apparatus 50 and the liquid application method according to the embodiment are, for example, for application of a liquid whose main component is a low-boiling-point / low-concentration liquid such as a lower alcohol that is an alcohol having 5 or less carbon atoms in a chemical formula. Especially suitable.

また、本実施形態では、ポンプ52、バルブ55、および搬送装置57の動作を制御部58が制御するものとしたが、これら各部材の動作の一部または全部をユーザが手動で制御してもよい。   In the present embodiment, the control unit 58 controls the operations of the pump 52, the valve 55, and the transport device 57. However, even if the user manually controls some or all of the operations of these members. Good.

また、本実施形態において、液体塗布装置50に備えられる制御部58を、CPU等のプロセッサを用いてソフトウェアによって実現してもよい。この場合、液体塗布装置50は、各機能を実現する制御プログラムの命令を実行するCPU(central processing unit)、上記プログラムを格納したROM(read only memory)、上記プログラムを展開するRAM(random access memory)、上記プログラムおよび各種データを格納するメモリ等の記憶装置(記録媒体)などを備えている。そして、本発明の目的は、上述した機能を実現するソフトウェアである液体塗布装置50の制御プログラムのプログラムコード(実行形式プログラム、中間コードプログラム、ソースプログラム)をコンピュータで読み取り可能に記録した記録媒体を、液体塗布装置50に供給し、そのコンピュータ(またはCPUやMPU)が記録媒体に記録されているプログラムコードを読み出し実行することによって達成される。   In the present embodiment, the control unit 58 provided in the liquid applying apparatus 50 may be realized by software using a processor such as a CPU. In this case, the liquid application apparatus 50 includes a central processing unit (CPU) that executes instructions of a control program that realizes each function, a read only memory (ROM) that stores the program, and a random access memory (RAM) that expands the program. ), A storage device (recording medium) such as a memory for storing the program and various data. An object of the present invention is a recording medium in which a program code (execution format program, intermediate code program, source program) of a control program for the liquid application apparatus 50, which is software that realizes the above-described functions, is recorded in a computer-readable manner. This is achieved by supplying the liquid application apparatus 50 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU).

上記記録媒体としては、例えば、磁気テープやカセットテープ等のテープ系、フロッピー(登録商標)ディスク/ハードディスク等の磁気ディスクやCD−ROM/MO/MD/DVD/CD−R等の光ディスクを含むディスク系、ICカード(メモリカードを含む)/光カード等のカード系、あるいはマスクROM/EPROM/EEPROM/フラッシュROM等の半導体メモリ系などを用いることができる。   Examples of the recording medium include a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, and an optical disk such as a CD-ROM / MO / MD / DVD / CD-R. Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM / flash ROM.

また、液体塗布装置50を通信ネットワークと接続可能に構成し、通信ネットワークを介して上記プログラムコードを供給してもよい。この通信ネットワークとしては、特に限定されず、例えば、インターネット、イントラネット、エキストラネット、LAN、ISDN、VAN、CATV通信網、仮想専用網(virtual private network)、電話回線網、移動体通信網、衛星通信網等が利用可能である。また、通信ネットワークを構成する伝送媒体としては、特に限定されず、例えば、IEEE1394、USB、電力線搬送、ケーブルTV回線、電話線、ADSL回線等の有線でも、IrDAやリモコンのような赤外線、Bluetooth(登録商標)、802.11無線、HDR、携帯電話網、衛星回線、地上波デジタル網等の無線でも利用可能である。なお、本発明は、上記プログラムコードが電子的な伝送で具現化された、搬送波に埋め込まれたコンピュータデータ信号の形態でも実現され得る。   Further, the liquid application device 50 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Also, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

また、液体塗布装置50の制御部58は、ソフトウェアを用いて実現されるものに限らず、ハードウェアロジックによって構成されるものであってもよく、処理の一部を行うハードウェアと当該ハードウェアの制御や残余の処理を行うソフトウェアを実行する演算手段とを組み合わせたものであってもよい。   In addition, the control unit 58 of the liquid application apparatus 50 is not limited to that realized using software, and may be configured by hardware logic. Hardware that performs part of the processing and the hardware It may be a combination of arithmetic means for executing software for performing the above control and residual processing.

本発明は、上述した各実施形態に限定されるものではなく、請求項に示した範囲で種々の変更が可能であり、本実施形態にそれぞれ開示された技術的手段を適宜組み合わせて得られる実施形態についても本発明の技術的範囲に含まれる。   The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and the embodiments can be obtained by appropriately combining the technical means disclosed in the embodiments. The form is also included in the technical scope of the present invention.

本発明は、被塗布部材に対して液体を塗布する液体塗布方法および液体塗布装置に適用でき、特に低沸点・低粘度の液体を塗布する液体塗布方法および液体塗布装置に好適に適用できる。   INDUSTRIAL APPLICABILITY The present invention can be applied to a liquid coating method and a liquid coating apparatus that apply a liquid to a member to be coated, and can be suitably applied to a liquid coating method and a liquid coating apparatus that apply a liquid having a low boiling point and low viscosity.

1 液晶表示装置
10 バックライト
13 導光板
20 光源モジュール
21 光源ホルダー
22 ヒートシンク
23a・23b LEDチップ(光源)
24a・24b LED基板
25a・25b スペーサ
30 光結合部材(被塗布部材)
30a 分割部材
31 平坦部
32・32 全反射面
33・33 平坦部
34 内周面
41 撥液性材料
50 液体塗布装置
51 タンク(貯蔵部)
52 ポンプ(加圧手段)
53 加圧管(加圧手段)
54 供給管(供給路)
55 バルブ
56 塗布部材
57 搬送装置(搬送部)
58 制御部
61 タンク圧制御部
62 バルブ制御部
63 相対位置制御部
D ダミー部材
DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 10 Backlight 13 Light guide plate 20 Light source module 21 Light source holder 22 Heat sink 23a * 23b LED chip (light source)
24a / 24b LED substrate 25a / 25b Spacer 30 Optical coupling member (member to be coated)
30a Dividing member 31 Flat part 32/32 Total reflection surface 33/33 Flat part 34 Inner peripheral surface 41 Liquid repellent material 50 Liquid application device 51 Tank (storage part)
52 Pump (Pressurizing means)
53 Pressurizing tube (pressurizing means)
54 Supply pipe (supply path)
55 Valve 56 Application member 57 Conveying device (conveying unit)
58 Control Unit 61 Tank Pressure Control Unit 62 Valve Control Unit 63 Relative Position Control Unit D Dummy Member

Claims (5)

液体塗布装置を用いて被塗布部材における被塗布領域に塗布液を塗布する液体塗布方法であって、
上記液体塗布装置は、
上記塗布液を貯蔵する貯蔵部と、
上記被塗布領域に当接して上記塗布液を上記被塗布領域に塗布する塗布部材と、
上記貯蔵部から上記塗布部材に上記塗布液を供給するための供給路と、
上記供給路を開状態と閉状態とに切り替えるバルブとを備えており、
上記塗布部材を上記被塗布部材から離間させた状態で上記バルブにより上記供給路を開状態とすることで上記貯蔵部から上記塗布部材に上記塗布液を供給し、上記塗布液を上記塗布部材に含浸させる補給工程と、
上記補給工程の後、上記バルブにより上記供給路を閉状態とすることで上記貯蔵部から上記塗布部材への上記塗布液の供給を遮断する補給停止工程と、
上記補給停止工程の後、上記塗布部材と上記被塗布部材の上記被塗布領域とを当接させて上記塗布部材に含浸している上記塗布液の一部を上記被塗布領域に塗布する塗布工程とを含むことを特徴とする液体塗布方法。
A liquid application method for applying a coating liquid to a region to be coated in a member to be coated using a liquid coating apparatus,
The liquid application apparatus is
A storage unit for storing the coating liquid;
An application member that contacts the application area and applies the application liquid to the application area;
A supply path for supplying the coating liquid from the storage unit to the coating member;
A valve for switching the supply path between an open state and a closed state;
The application liquid is supplied from the storage unit to the application member by opening the supply path with the valve while the application member is separated from the application member, and the application liquid is supplied to the application member. A replenishment step for impregnation;
After the replenishment step, a replenishment stop step of shutting off the supply of the coating liquid from the storage unit to the application member by closing the supply path by the valve;
After the replenishment stop step, the application step of bringing the application member and the application region of the application member into contact with each other and applying a part of the application liquid impregnated in the application member to the application region A liquid application method comprising:
上記液体塗布装置は、上記被塗布部材と上記塗布部材との相対位置を変化させるように上記被塗布部材および上記塗布部材の少なくとも一方を移動させる搬送部を備えており、
上記塗布工程では、
上記被塗布部材における上記被塗布領域を有する平面に対する上記塗布部材の配置位置の相対高さが上記移動中に一定となり、かつ上記被塗布領域の各部と上記塗布部材との当接時間が当該各部に対して目標塗布量の上記塗布液を塗布することのできる当接時間になるように上記搬送部の動作を制御することを特徴とする請求項1に記載の液体塗布方法。
The liquid coating apparatus includes a transport unit that moves at least one of the coated member and the coating member so as to change a relative position between the coated member and the coating member,
In the application process,
The relative height of the arrangement position of the application member with respect to the plane having the application area in the application member is constant during the movement, and the contact time between each part of the application area and the application member corresponds to each part. The liquid application method according to claim 1, wherein the operation of the transport unit is controlled so as to have a contact time during which a target application amount of the application liquid can be applied.
上記被塗布部材は複数の分割部材を互いに隣接するように配置したものであり、
上記塗布工程よりも前に、上記分割部材における他の分割部材との対向面に上記塗布液に対する撥液性を有する材料を塗布または貼付する撥液処理工程を行うことを特徴とする請求項1または2に記載の液体塗布方法。
The coated member is a plurality of divided members arranged so as to be adjacent to each other,
The liquid-repellent treatment step of applying or sticking a material having liquid repellency to the coating liquid to a surface of the divided member facing the other divided member is performed before the coating step. Or the liquid application method of 2.
被塗布部材における被塗布領域に塗布液を塗布するための液体塗布装置であって、
上記塗布液を貯蔵する貯蔵部と、
上記被塗布領域に当接して上記塗布液を上記被塗布領域に塗布する塗布部材と、
上記貯蔵部から上記塗布部材に上記塗布液を供給するための供給路と、
上記供給路を開状態と閉状態とに切り替えるバルブと、
上記被塗布部材と上記塗布部材との相対位置を変化させるように上記被塗布部材および上記塗布部材の少なくとも一方を移動させる搬送部と、
上記バルブおよび上記搬送部の動作を制御する制御部とを備え、
上記制御部は、
上記塗布部材を上記被塗布部材から離間させた状態で上記バルブにより上記供給路を開状態とすることで上記貯蔵部から上記塗布部材に上記塗布液を供給させ、上記塗布液を上記塗布部材に含浸させる補給処理と、
上記補給処理の後、上記バルブにより上記供給路を閉状態とすることで上記貯蔵部から上記塗布部材への上記塗布液の供給を遮断する補給停止処理と、
上記補給停止処理の後、上記塗布部材と上記被塗布部材の上記被塗布領域とを当接させて上記塗布部材に含浸している上記塗布液の一部を上記被塗布領域に塗布させる塗布処理とを行うように上記バルブおよび上記搬送部の動作を制御することを特徴とする液体塗布装置。
A liquid application apparatus for applying a coating liquid to a region to be coated in a member to be coated,
A storage unit for storing the coating liquid;
An application member that contacts the application area and applies the application liquid to the application area;
A supply path for supplying the coating liquid from the storage unit to the coating member;
A valve for switching the supply path between an open state and a closed state;
A transport unit that moves at least one of the coated member and the coating member so as to change a relative position between the coated member and the coating member;
A control unit for controlling the operation of the valve and the transport unit,
The control unit
The supply liquid is supplied from the storage unit to the application member by opening the supply path with the valve while the application member is separated from the application member, and the application liquid is supplied to the application member. Replenishment treatment to impregnate,
After the replenishment process, a supply stop process for shutting off the supply of the coating liquid from the storage unit to the application member by closing the supply path with the valve;
After the replenishment stop process, a coating process in which a part of the coating liquid impregnated in the coating member is applied to the coated area by bringing the coated member and the coated area of the coated member into contact with each other. A liquid coating apparatus that controls operations of the valve and the transport unit so as to perform the following operations.
指向性を有する光を出射する光源を有する光源ユニットと、上記光源ユニットから入射する光を面内方向に伝播させる平板状の導光板とを備え、上記導光板の平板面のうちの一方の面である平板表面から出射される光を用いて照明を行う照明装置の製造方法であって、
上記光源ユニットは、上記光源から出射された光を上記導光板に入射させるための光結合部材を備え、かつ上記導光板の平板面のうちの他方の面である平板裏面側に配置されており、
上記光結合部材は、上記光源から出射された光を、当該光が上記導光板の平板裏面側から入射し、上記導光板における平板表面において全反射して上記導光板内を上記面内方向に伝播するように上記導光板に入射させるものであり、
上記光結合部材と上記導光板とを接着させる接着工程を含み、
上記接着工程は、
上記光結合部材における上記導光板との対向領域、および上記導光板における上記光結合部材との対向領域のうちの少なくとも一方に、請求項1から3のいずれか1項に記載の液体塗布方法を用いて赤外線吸収材を含有する塗布液を塗布する塗布工程と、
上記光結合部材と上記導光板とを上記赤外線吸収材を介して当接させる工程と、
上記光結合部材と上記導光板とを上記赤外線吸収材を介して当接させた状態で上記赤外線吸収材に赤外線を照射し、上記赤外線吸収材に赤外線を吸収させて発熱させることにより、上記光結合部材および上記導光板の少なくとも一方の表面を溶融させて上記光結合部材と上記導光板とを接着させる工程とを含むことを特徴とする照明装置の製造方法。
A light source unit having a light source that emits light having directivity; and a flat light guide plate that propagates light incident from the light source unit in an in-plane direction, and one of the flat surfaces of the light guide plate A method of manufacturing an illumination device that performs illumination using light emitted from a flat plate surface,
The light source unit includes an optical coupling member for allowing light emitted from the light source to enter the light guide plate, and is disposed on the flat plate rear surface side that is the other surface of the flat plate surfaces of the light guide plate. ,
The optical coupling member receives light emitted from the light source from the flat plate rear surface side of the light guide plate, and totally reflects on the flat plate surface of the light guide plate so that the inside of the light guide plate is directed in the in-plane direction. It is incident on the light guide plate so as to propagate,
Including a bonding step of bonding the optical coupling member and the light guide plate;
The bonding step is
The liquid application method according to any one of claims 1 to 3, wherein at least one of a region facing the light coupling plate in the light coupling member and a region facing the light coupling member in the light guiding plate is used. An application step of applying an application liquid containing an infrared absorbing material,
Contacting the optical coupling member and the light guide plate via the infrared absorbing material;
By irradiating the infrared ray absorbing material with infrared rays in a state where the optical coupling member and the light guide plate are in contact with each other through the infrared ray absorbing material, the infrared ray absorbing material absorbs infrared rays to generate heat, thereby generating the light. The manufacturing method of the illuminating device characterized by including the process of fuse | melting the surface of at least one of a coupling member and the said light-guide plate, and adhere | attaching the said optical coupling member and the said light-guide plate.
JP2011094539A 2011-04-20 2011-04-20 Method and device for coating liquid, and manufacturing method of lighting device Withdrawn JP2012223722A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103964700A (en) * 2013-01-28 2014-08-06 松下电器产业株式会社 Coating apparatus and coating method
KR102246142B1 (en) * 2019-10-24 2021-04-29 주식회사 이오테크닉스 laser processing apparatus and coating module used in the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103964700A (en) * 2013-01-28 2014-08-06 松下电器产业株式会社 Coating apparatus and coating method
JP2014144386A (en) * 2013-01-28 2014-08-14 Panasonic Corp Coating device and coating method
CN103964700B (en) * 2013-01-28 2016-05-18 松下知识产权经营株式会社 Applying device and coating method
KR102246142B1 (en) * 2019-10-24 2021-04-29 주식회사 이오테크닉스 laser processing apparatus and coating module used in the same

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