JP2011075819A - Image display device - Google Patents
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Abstract
Description
本発明は、画像表示パネルを具えた画像表示装置に関する。 The present invention relates to an image display device including an image display panel.
従来の画像表示装置は、その殆どが屋内に設置することを前提として設計されたものであり（例えば特許文献１参照）、該画像表示装置には、画像表示パネル等の画像表示部や画像表示部の動作を制御する回路基板等を風雨やダスト等から保護する対策が施されていなかった。このため、従来の画像表示装置は、屋外に常設することが困難であった。 Conventional image display apparatuses are designed on the assumption that most of them are installed indoors (see, for example, Patent Document 1). No measures have been taken to protect circuit boards or the like that control the operation of the unit from wind and rain or dust. For this reason, it has been difficult to permanently install a conventional image display device outdoors.
近年、平面型の画像表示パネルを具えた画像表示装置を屋外に常設することが望まれている。その理由として、該画像表示装置はその厚さ寸法が小さいこと等が挙げられる。厚さ寸法が小さいと、狭い場所への画像表示装置の設置が可能となる。 In recent years, it has been desired that an image display device including a flat image display panel be permanently installed outdoors. The reason is that the image display device has a small thickness. When the thickness dimension is small, the image display device can be installed in a narrow place.
上記画像表示装置の屋外への常設を可能にするべく、筐体の内部に、密閉構造を有する収容室を形成し、該収容室に画像表示パネルと回路基板とを収容することが考えられる。 In order to allow the image display device to be installed outdoors, it is conceivable that a housing chamber having a sealed structure is formed inside the housing, and the image display panel and the circuit board are housed in the housing chamber.
しかしながら、画像表示パネルと回路基板とを同じ１つの収容室に収容すると、画像表示パネルと回路基板とから生じる熱により、収容室内の温度が上昇し易くなる。このため、画像表示パネルの温度が上昇して該画像表示パネルの機能が低下し、その結果、画像表示が不能になる虞がある。又、回路基板の温度が上昇して該回路基板が破損する虞がある。 However, when the image display panel and the circuit board are accommodated in the same accommodation chamber, the temperature in the accommodation chamber is likely to rise due to heat generated from the image display panel and the circuit board. For this reason, the temperature of the image display panel rises and the function of the image display panel decreases, and as a result, there is a possibility that the image display becomes impossible. Further, the temperature of the circuit board rises and the circuit board may be damaged.
これに対し、上記収容室内の空気を冷却する冷却手段を具えた画像表示装置によれば、収容室内の温度上昇が抑制されることになる。しかし、画像表示パネルと回路基板とが同じ１つの収容室に収容された画像表示装置においては、回路基板は、画像表示パネルに近接して配置されることになる。このため、画像表示パネルから生じる熱は回路基板に伝達され易く、従って、冷却手段によって収容室内の空気が冷却されているにも拘わらず、回路基板の温度が上昇して該回路基板が破損する虞がある。 On the other hand, according to the image display device provided with the cooling means for cooling the air in the accommodation chamber, the temperature rise in the accommodation chamber is suppressed. However, in the image display apparatus in which the image display panel and the circuit board are accommodated in the same accommodation chamber, the circuit board is disposed in the vicinity of the image display panel. For this reason, the heat generated from the image display panel is easily transferred to the circuit board. Therefore, the temperature of the circuit board rises and the circuit board is damaged even though the air in the accommodation chamber is cooled by the cooling means. There is a fear.
一方、収容室の外部に回路基板を配備した画像表示装置、例えば収容室を形成する背面壁の背面側に回路基板を配備した画像表示装置によれば、画像表示パネルから生じる熱が回路基板に伝達され難くなる。しかし、この構成においては、密閉構造を有する収容室の外部に回路基板が配置されるため、画像表示装置を屋外に常設した場合、回路基板が風雨やダスト等に晒されて回路基板が破損する虞がある。 On the other hand, according to an image display device in which a circuit board is provided outside the storage chamber, for example, an image display device in which a circuit board is provided on the back side of the back wall forming the storage chamber, heat generated from the image display panel is applied to the circuit board. It becomes difficult to be transmitted. However, in this configuration, since the circuit board is disposed outside the accommodating chamber having a sealed structure, when the image display device is permanently installed outdoors, the circuit board is exposed to wind and rain, dust, etc., and the circuit board is damaged. There is a fear.
そこで本発明の目的は、画像表示パネルの動作を制御する回路基板を冷却することが可能であって、且つ、該回路基板が破損し難い画像表示装置を提供することである。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an image display device that can cool a circuit board that controls the operation of an image display panel and that the circuit board is not easily damaged.
本発明に係る画像表示装置は、密閉構造を有する収容室と、該収容室内の空気を冷却する冷却手段とを具え、前記収容室には、画像表示パネルと、該画像表示パネルの動作を制御する回路基板とが収容され、前記収容室を形成する前面壁には、前記画像表示パネルの画面と対向する画像表示窓が設けられている。ここで、前記収容室は、板部材によって、該収容室を形成する前面壁に沿う前面側領域と、該収容室を形成する背面壁に沿う背面側領域とに仕切られ、収容室の前面側領域に前記画像表示パネルが配備される一方、収容室の背面側領域に前記回路基板が配備されている。前記冷却手段は収容室の前面側領域内の空気を冷却するものであり、前記収容室の前面側領域には更に、前記画像表示パネルの背面側の空気を該背面に沿って所定の方向へ流す送風手段が配備され、前記板部材には、前記所定の方向と略同一の方向に並んだ一対の開口が形成されている。 An image display device according to the present invention includes a storage chamber having a sealed structure and a cooling means for cooling air in the storage chamber. The storage chamber controls an image display panel and an operation of the image display panel. An image display window facing the screen of the image display panel is provided on the front wall forming the storage chamber. Here, the storage chamber is partitioned by a plate member into a front side region along the front wall forming the storage chamber and a back side region along the back wall forming the storage chamber, and the front side of the storage chamber While the image display panel is provided in the area, the circuit board is provided in the rear side area of the storage chamber. The cooling means cools the air in the front side region of the storage chamber, and further the air on the back side of the image display panel is directed in a predetermined direction along the back side in the front side region of the storage chamber. A blowing means for flowing is provided, and the plate member is formed with a pair of openings arranged in substantially the same direction as the predetermined direction.
上記画像表示装置においては、密閉構造を有する収容室に画像表示パネルと回路基板とが収容されているので、画像表示装置が屋外に設置された場合でも、画像表示パネルと回路基板は風雨やダスト等から保護されることになる。 In the above image display device, since the image display panel and the circuit board are accommodated in the housing chamber having a sealed structure, the image display panel and the circuit board are protected from wind and rain even when the image display device is installed outdoors. It will be protected from etc.
又、上記画像表示装置においては、収容室が、板部材によって、画像表示パネルが配備されている前面側領域と、回路基板が配備されている背面側領域とに仕切られているので、画像表示パネルと回路基板との間には板部材が介在することになる。従って、画像表示パネルから生じた熱は回路基板に伝達され難い。 In the image display device, the storage chamber is partitioned by a plate member into a front side region where the image display panel is provided and a back side region where the circuit board is provided. A plate member is interposed between the panel and the circuit board. Therefore, heat generated from the image display panel is difficult to be transferred to the circuit board.
一方、収容室の前面側領域内には画像表示パネルから生じる熱が溜まり易く、又、収容室の背面側領域内には回路基板から生じる熱が溜まり易い。このため、収容室の前面側領域及び背面側領域内の温度は上昇し易くなっている。ここで、収容室の前面側領域内の空気は冷却手段により冷却される。よって、収容室の前面側領域内の温度上昇が抑制され、その結果、画像表示パネルの温度上昇が抑制されて、画像表示パネルの機能は正常な状態に維持される。 On the other hand, heat generated from the image display panel easily accumulates in the front side region of the storage chamber, and heat generated from the circuit board easily accumulates in the rear side region of the storage chamber. For this reason, the temperature in the front side area | region and back side area | region of a storage chamber tends to rise. Here, the air in the front side region of the storage chamber is cooled by the cooling means. Therefore, the temperature rise in the front side region of the storage chamber is suppressed, and as a result, the temperature rise of the image display panel is suppressed and the function of the image display panel is maintained in a normal state.
上記画像表示装置においては、送風手段が動作して画像表示パネルの背面側の空気が該背面に沿って所定の方向へ流れると、該空気の一部が、上流側の開口を通過して収容室の背面側領域へ流れ込み、該背面側領域に流れ込んだ空気は、背面側領域を通過して、下流側の開口から収容室の前面側領域へ戻ることになる。ここで、収容室の前面側領域内の空気は冷却手段により冷却されるので、冷却手段によって冷却された空気の一部が、収容室の背面側領域を通過することになる。よって、収容室の背面側領域内の温度上昇が抑制され、その結果、熱による回路基板の破損が防止されることになる。 In the image display device, when the air blowing unit operates and air on the back side of the image display panel flows in a predetermined direction along the back side, a part of the air passes through the opening on the upstream side and is accommodated. The air that flows into the back side region of the chamber and flows into the back side region passes through the back side region and returns to the front side region of the storage chamber from the downstream opening. Here, since the air in the front side region of the storage chamber is cooled by the cooling unit, a part of the air cooled by the cooling unit passes through the back side region of the storage chamber. Therefore, the temperature rise in the back side region of the storage chamber is suppressed, and as a result, damage to the circuit board due to heat is prevented.
上記画像表示装置の具体的構成において、前記一対の開口の内、一方の開口の内側又は該一方の開口の近傍位置には第１送風装置が配備され、他方の開口の内側又は該他方の開口の近傍位置には第２送風装置が配備されており、前記第１送風装置は、前記収容室内の空気を前面側領域から背面側領域へ前記一方の開口を通過させ、前記第２送風装置は、前記収容室内の空気を背面側領域から前面側領域へ前記他方の開口を通過させる。
該具体的構成によれば、第１送風装置を動作させることにより、画像表示パネルの背面側を流れる空気の一部が、一方の開口を通過して収容室の背面側領域へ流れ込み易くなる。又、第２送風装置を動作させることにより、一方の開口から収容室の背面側領域へ流れ込んだ空気は、背面側領域を通過して、他方の開口から収容室の前面側領域へ戻り易くなる。従って、収容室の背面側領域には、冷却手段によって冷却された空気の一部が通過し易くなる。
In the specific configuration of the image display device, a first air blower is provided inside the one opening or in the vicinity of the one opening, and inside the other opening or the other opening. A second blower is disposed in the vicinity of the first blower, and the first blower allows the air in the housing chamber to pass through the one opening from the front side region to the back side region, and the second blower is The air in the accommodation chamber is passed through the other opening from the back side region to the front side region.
According to this specific configuration, by operating the first air blower, a part of the air flowing on the back side of the image display panel easily passes through one opening and flows into the back side region of the storage chamber. Also, by operating the second blower, the air that has flowed from one opening to the rear side region of the storage chamber easily passes through the rear side region and returns from the other opening to the front side region of the storage chamber. . Accordingly, a part of the air cooled by the cooling means easily passes through the rear side region of the storage chamber.
より具体的な構成において、前記板部材には、前記一方の開口を開閉する第１蓋部材が枢支されると共に、前記他方の開口を開閉する第２蓋部材が枢支され、前記第１蓋部材は、前記第１送風装置からの風圧を受けて前記収容室の背面側領域の内側へ開き、前記第２蓋部材は、前記第２送風装置からの風圧を受けて前記収容室の前面側領域の内側へ開く。 In a more specific configuration, the plate member is pivotally supported by a first lid member that opens and closes the one opening, and is pivotally supported by a second lid member that opens and closes the other opening. The lid member receives the wind pressure from the first blower and opens to the inside of the rear side region of the storage chamber, and the second lid member receives the wind pressure from the second blower and receives the wind pressure from the front of the storage chamber. Open inside the side area.
上記具体的構成によれば、第１送風装置及び第２送風装置が動作している場合、第１蓋部材及び第２蓋部材が開いて一対の開口が露出することになる。従って、収容室の前面側領域と背面側領域との間での空気の移動が両蓋部材によって妨げられることがない。
一方、第１送風装置及び第２送風装置の動作が停止している場合、第１蓋部材及び第２蓋部材が閉じて、一対の開口が塞がれることになる。従って、収容室の前面側領域と背面側領域との間での空気の移動が、両蓋部材によって阻止されることになる。よって、収容室の前面側領域内の空気が、冷却手段によって効率良く冷却されることになり、その結果、画像表示パネルの温度が低下し易くなる。
According to the specific configuration, when the first blower and the second blower are operating, the first lid member and the second lid member are opened, and the pair of openings are exposed. Therefore, the movement of air between the front side region and the back side region of the storage chamber is not hindered by the both lid members.
On the other hand, when the operations of the first blower and the second blower are stopped, the first lid member and the second lid member are closed, and the pair of openings are closed. Accordingly, the movement of air between the front side region and the back side region of the storage chamber is prevented by the two lid members. Therefore, the air in the front side region of the storage chamber is efficiently cooled by the cooling means, and as a result, the temperature of the image display panel is likely to decrease.
上記画像表示装置の他の具体的構成において、前記収容室の前面側領域には、前記画像表示パネルの前面側と背面側を通過して該画像表示パネルを包囲する循環流路が形成されており、収容室の前面側領域内の空気は、前記送風手段の動作により前記循環流路に沿って循環する。
該具体的構成によれば、循環流路内を循環する空気によって、画像表示パネルの背面側から生じる熱だけでなく、画像表示パネルの前面側から生じる熱が回収されることになる。従って、画像表示パネルは効率良く冷却されることになる。
In another specific configuration of the image display device, a circulation channel that surrounds the image display panel through the front side and the back side of the image display panel is formed in the front side region of the storage chamber. The air in the front side region of the storage chamber circulates along the circulation flow path by the operation of the blowing means.
According to this specific configuration, not only the heat generated from the back side of the image display panel but also the heat generated from the front side of the image display panel is recovered by the air circulating in the circulation flow path. Therefore, the image display panel is efficiently cooled.
本発明に係る画像表示装置は、画像表示パネルの動作を制御する回路基板を冷却することが可能であって、且つ、該回路基板が破損し難い。 The image display device according to the present invention can cool the circuit board that controls the operation of the image display panel, and the circuit board is hardly damaged.
以下、本発明の実施の形態につき、図面に沿って具体的に説明する。
図１に示す様に、本発明の一実施形態に係る画像表示装置は、筐体(１)と、筐体(１)内に配備されている液晶表示パネル(２)と、筐体(１)を支持するキャスタ付き支持台(３)と、冷却装置(４)とを具えている。液晶表示パネル(２)は、画像表示用の光源として発光ダイオード（ＬＥＤ）を有している。
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
As shown in FIG. 1, an image display apparatus according to an embodiment of the present invention includes a housing (1), a liquid crystal display panel (2) disposed in the housing (1), and a housing (1 ) And a cooling device (4). The liquid crystal display panel (2) has a light emitting diode (LED) as a light source for image display.
図２に示す様に、筐体(１)の内部には、密閉構造を有する収容室(５)が形成されている。収容室(５)を形成する前面壁(51)は、筐体(１)を構成する前面壁(11)により構成されており、該前面壁(11)は、光透過性を有する材質、例えばガラス材から形成されている。一方、収容室(５)を形成する上面壁、下面壁、両側面壁及び背面壁は、アルミニウム等の金属から形成されている。 As shown in FIG. 2, a housing chamber (5) having a sealed structure is formed inside the housing (1). The front wall (51) forming the housing chamber (5) is constituted by a front wall (11) constituting the housing (1), and the front wall (11) is made of a light-transmitting material, for example, It is formed from a glass material. On the other hand, the upper wall, the lower wall, the both side walls, and the back wall forming the storage chamber (5) are made of metal such as aluminum.
収容室(５)は、板部材(６)によって、収容室(５)を形成する前面壁(51)に沿う前面側領域(53)と、収容室(５)を形成する背面壁(52)に沿う背面側領域(54)とに仕切られている。板部材(６)には、上下一対の開口(61)(62)が形成されている。 The storage chamber (5) includes a plate member (6), a front side region (53) along the front wall (51) forming the storage chamber (5), and a back wall (52) forming the storage chamber (5). And is divided into a rear side region (54). A pair of upper and lower openings (61) and (62) are formed in the plate member (6).
収容室(５)の前面側領域(53)には、液晶表示パネル(２)が収容されており、該液晶表示パネル(２)の画面(21)は、収容室(５)を形成する前面壁(51)（筐体(１)の前面壁(11)）に向けられている。斯くして、図２に示す様に、収容室(５)を形成する前面壁(51)（筐体(１)の前面壁(11)）の内、液晶表示パネル(２)の画面(21)と対向する部分により画像表示窓(10)が構成され、該画像表示窓(10)を通じて、液晶表示パネル(２)の画面(21)を筐体(１)の外部から視認することが可能になっている。 The liquid crystal display panel (2) is accommodated in the front side region (53) of the accommodation chamber (5), and the screen (21) of the liquid crystal display panel (2) is the front surface forming the accommodation chamber (5). It is directed to the wall (51) (the front wall (11) of the housing (1)). Thus, as shown in FIG. 2, the screen (21) of the liquid crystal display panel (2) out of the front wall (51) (the front wall (11) of the housing (1)) forming the accommodation chamber (5). ) Constitutes an image display window (10), through which the screen (21) of the liquid crystal display panel (2) can be viewed from the outside of the housing (1). It has become.
収容室(５)の前面側領域(53)内には、液晶表示パネル(２)の前面側と背面側とを通過して該液晶表示パネル(２)を包囲する循環流路(50)が形成されている。具体的には、循環流路(50)は、液晶表示パネル(２)の画面(21)と画像表示窓(10)との間を通過する第１流路部(501)と、液晶表示パネルの背面(25)と板部材(６)との間を通過する第２流路部(502)とを含み、該第１流路部(501)と第２流路部(502)は、それらの上端部が互いに連通すると共に、それらの下端部が、収容室(５)の下方位置にて冷却装置(４)を介して互いに連通している。 A circulation channel (50) that passes through the front side and the back side of the liquid crystal display panel (2) and surrounds the liquid crystal display panel (2) is provided in the front side region (53) of the storage chamber (5). Is formed. Specifically, the circulation flow path (50) includes a first flow path portion (501) passing between the screen (21) of the liquid crystal display panel (2) and the image display window (10), and a liquid crystal display panel. A second flow path portion (502) passing between the back surface (25) of the plate and the plate member (6), the first flow path portion (501) and the second flow path portion (502) The upper ends of the two are in communication with each other, and the lower ends thereof are in communication with each other via the cooling device (4) at a position below the storage chamber (5).
収容室(５)の前面側領域(53)には更に、送風装置(70)が収容されており、該送風装置(70)は、液晶表示パネル(２)の背面側の位置にて、その吸気側を上方に向けると共にその排気側を下方に向けて配置されている。従って、送風装置(70)が動作することにより、図２において一点鎖線矢印によって示す様に、循環流路(50)の第２流路部(502)内の空気（液晶表示パネル(２)の背面側の空気）は、液晶表示パネル(２)の背面に沿って下方へ流れ、その後、冷却装置(４)を通過して第１流路部(501)へ下方から流れ込むことになる。よって、循環流路(50)の第１流路部(501)内の空気（液晶表示パネル(２)の前面側の空気）は、液晶表示パネル(２)の前面に沿って上方へ流れ、その後、液晶表示パネル(２)の上面側を通過して第２流路部(502)へ上方から流れ込むことになる。この様に、送風装置(70)が動作することにより、収容室(５)の前面側領域(53)内の空気は、循環流路(50)に沿って循環することになる。 The front side region (53) of the storage chamber (5) further contains a blower device (70), and the blower device (70) is located at a position on the back side of the liquid crystal display panel (2). The intake side is directed upward and the exhaust side thereof is directed downward. Therefore, when the air blower (70) is operated, as indicated by a one-dot chain line arrow in FIG. 2, air in the second flow path portion (502) of the circulation flow path (50) (the liquid crystal display panel (2) The air on the back side flows downward along the back surface of the liquid crystal display panel (2), then passes through the cooling device (4) and flows into the first flow path portion (501) from below. Accordingly, the air in the first flow path portion (501) of the circulation flow path (50) (air on the front side of the liquid crystal display panel (2)) flows upward along the front surface of the liquid crystal display panel (2), Thereafter, it passes through the upper surface side of the liquid crystal display panel (2) and flows into the second flow path portion (502) from above. Thus, by operating the air blower (70), the air in the front side region (53) of the storage chamber (5) circulates along the circulation channel (50).
収容室(５)の背面側領域(54)には、液晶表示パネル(２)の動作を制御する回路基板(22)が収容されており、該回路基板(22)は、板部材(６)の背面の内、上下一対の開口(61)(62)が形成されている領域の間の領域に取り付けられている。 A circuit board (22) for controlling the operation of the liquid crystal display panel (2) is accommodated in the rear side area (54) of the accommodation chamber (5). The circuit board (22) is composed of a plate member (6). Is attached to a region between a region where a pair of upper and lower openings (61) and (62) are formed.
図示していないが、冷却装置(４)は、循環流路(50)内の熱を回収する蒸発器と、該蒸発器により回収された熱を循環流路(50)の外部に排出する凝縮器とを具え、蒸発器と凝縮器とは、冷媒が流れる配管によって互いに連結されている。又、冷却装置(４)は、蒸発器から凝縮器へ流れる冷媒を圧縮する圧縮機を具えている。従って、凝縮器には高温且つ高圧の冷媒が流れ込むことになる。よって、蒸発器によって回収された熱は、凝縮器により効率良く排出される。
従って、冷却装置(４)によって循環流路(50)内を循環する空気が冷却され、これにより、収容室(５)の前面側領域(53)内の空気が冷却されることになる。
Although not shown, the cooling device (4) includes an evaporator that recovers heat in the circulation channel (50), and a condenser that exhausts the heat recovered by the evaporator to the outside of the circulation channel (50). The evaporator and the condenser are connected to each other by a pipe through which the refrigerant flows. The cooling device (4) includes a compressor that compresses the refrigerant flowing from the evaporator to the condenser. Therefore, a high-temperature and high-pressure refrigerant flows into the condenser. Therefore, the heat recovered by the evaporator is efficiently discharged by the condenser.
Accordingly, the air circulating in the circulation flow path (50) is cooled by the cooling device (4), whereby the air in the front side region (53) of the storage chamber (5) is cooled.
上記画像表示装置においては、密閉構造を有する収容室(５)に液晶表示パネル(２)と回路基板(22)とが収容されているので、画像表示装置が屋外に設置された場合でも、液晶表示パネル(２)と回路基板(22)は風雨やダスト等から保護されることになる。 In the image display device, since the liquid crystal display panel (2) and the circuit board (22) are accommodated in the accommodating chamber (5) having a sealed structure, the liquid crystal display panel can be used even when the image display device is installed outdoors. The display panel (2) and the circuit board (22) are protected from wind and rain and dust.
又、上記画像表示装置においては、収容室(５)が、板部材(６)によって、液晶表示パネル(２)が配備されている前面側領域(53)と、回路基板(22)が配備されている背面側領域(54)とに仕切られている。従って、液晶表示パネル(２)と回路基板(22)との間には板部材(６)が介在することになる。よって、液晶表示パネル(２)から生じた熱は回路基板(22)に伝達され難い。 In the image display device, the storage chamber (5) is provided with a plate member (6), a front side region (53) where the liquid crystal display panel (2) is provided, and a circuit board (22). And is divided into a rear side region (54). Accordingly, the plate member (6) is interposed between the liquid crystal display panel (2) and the circuit board (22). Therefore, the heat generated from the liquid crystal display panel (2) is difficult to be transmitted to the circuit board (22).
一方、収容室(５)の前面側領域(53)内には液晶表示パネル(２)から生じる熱が溜まり易く、又、収容室(５)の背面側領域(54)内には回路基板(22)から生じる熱が溜まり易い。このため、収容室(５)の前面側領域(53)及び背面側領域(54)内の温度は上昇し易くなっている。ここで、収容室(５)の前面側領域(53)内の空気は冷却装置(４)により冷却される。よって、収容室(５)の前面側領域(53)内の温度上昇が抑制され、その結果、液晶表示パネル(２)の温度上昇が抑制されて、液晶表示パネル(２)の機能は正常な状態に維持される。 On the other hand, heat generated from the liquid crystal display panel (2) easily accumulates in the front side region (53) of the storage chamber (5), and a circuit board (in the back side region (54) of the storage chamber (5)). Heat generated from 22) tends to accumulate. For this reason, the temperature in the front side region (53) and the back side region (54) of the storage chamber (5) is likely to rise. Here, the air in the front side region (53) of the storage chamber (5) is cooled by the cooling device (4). Therefore, the temperature rise in the front side region (53) of the storage chamber (5) is suppressed, and as a result, the temperature rise of the liquid crystal display panel (2) is suppressed and the function of the liquid crystal display panel (2) is normal. Maintained in a state.
又、循環流路(50)内を循環する空気によって、液晶表示パネル(２)の背面側から生じる熱だけでなく、液晶表示パネル(２)の前面側から生じる熱が回収されることになる。従って、液晶表示パネル(２)は効率良く冷却されることになる。 Moreover, not only the heat generated from the back side of the liquid crystal display panel (2) but also the heat generated from the front side of the liquid crystal display panel (2) is recovered by the air circulating in the circulation channel (50). . Therefore, the liquid crystal display panel (2) is efficiently cooled.
上記画像表示装置においては、送風装置(70)が動作することにより、液晶表示パネル(２)の背面側の空気が該背面に沿って下方へ流れる。このとき、液晶表示パネル(２)の背面側の空気が流れる方向、即ち、上から下へ向かう方向において、上側の開口(61)は上流側に位置し、下側の開口(62)は下流側に位置することになる。従って、図２において二点鎖線矢印によって示す様に、液晶表示パネル(２)の背面側を流れる空気の一部が、上側の開口(61)を通過して収容室(５)の背面側領域(54)へ流れ込み、該背面側領域(54)に流れ込んだ空気は、背面側領域(54)を通過して、下側の開口(62)から収容室(５)の前面側領域(53)へ戻ることになる。
ここで、収容室(５)の前面側領域(53)内の空気は冷却装置(４)により冷却されるので、冷却装置(４)によって冷却された空気の一部が、収容室(５)の背面側領域(54)を通過することになる。その結果、収容室(５)の背面側領域(54)内の温度上昇が抑制されて、熱による回路基板(22)の破損が防止されることになる。
In the image display device, the air blower (70) operates to cause the air on the back side of the liquid crystal display panel (2) to flow downward along the back side. At this time, in the direction in which the air on the back side of the liquid crystal display panel (2) flows, that is, from the top to the bottom, the upper opening (61) is located on the upstream side, and the lower opening (62) is on the downstream side. Will be located on the side. Therefore, as shown by the two-dot chain line arrow in FIG. 2, a part of the air flowing on the back side of the liquid crystal display panel (2) passes through the upper opening (61) and is in the back side region of the storage chamber (5). The air that flows into the rear side region (54) passes through the rear side region (54) and passes through the lower opening (62) to the front side region (53) of the storage chamber (5). Will return.
Here, since the air in the front side region (53) of the storage chamber (5) is cooled by the cooling device (4), part of the air cooled by the cooling device (4) is stored in the storage chamber (5). It passes through the back side region (54) of the. As a result, the temperature rise in the back side region (54) of the storage chamber (5) is suppressed, and damage to the circuit board (22) due to heat is prevented.
上記実施形態においては、送風装置(70)は、その吸気側を上方に向けて配置されていたが、本発明はこれに限られるものではない。送風装置(70)は、その吸気側を下方に向けて配置されてもよい。送風装置(70)の吸気側が下方に向けられると、循環流路(50)の第２流路部(502)内の空気（液晶表示パネル(２)の背面側の空気）は上方へ流れ、これによって、循環流路(50)の第１流路部(501)内の空気（液晶表示パネル(２)の前面側の空気）は下方へ流れることになる。 In the above embodiment, the air blower (70) is arranged with its intake side facing upward, but the present invention is not limited to this. The air blower (70) may be arranged with its intake side facing downward. When the intake side of the blower (70) is directed downward, the air in the second flow path portion (502) of the circulation flow path (50) (air on the back side of the liquid crystal display panel (2)) flows upward, As a result, air in the first flow path portion (501) of the circulation flow path (50) (air on the front side of the liquid crystal display panel (2)) flows downward.
循環流路(50)の第１流路部(501)と第２流路部(502)は、それらの側端部が互いに連通していてもよい。この構成においては、送風装置(70)は、その吸気側を側方に向けて配置されることになる。 The first flow path part (501) and the second flow path part (502) of the circulation flow path (50) may have their side ends communicating with each other. In this configuration, the air blower (70) is arranged with its intake side facing sideways.
上記実施形態においては、一対の開口(61)(62)は上下に並んで配置されていたが、本発明はこれに限られるものではない。一対の開口(61)(62)は、液晶表示パネル(２)の背面側の空気が該背面に沿って流れる所定の方向と略同一の方向に並んで配置されるべきものである。一対の開口(61)(62)をこの様に配置することにより、送風装置(70)が動作して液晶表示パネル(２)の背面側の空気が該背面に沿って所定の方向へ流れると、該空気の一部が、上流側の開口(61)を通過して収容室(５)の背面側領域(54)へ流れ込み、該背面側領域(54)に流れ込んだ空気は、背面側領域(54)を通過して、下流側の開口(62)から収容室(５)の前面側領域(53)へ戻ることになる。
よって、液晶表示パネル(２)の背面側の空気が該背面に沿って側方へ流れる構成においては、一対の開口(61)(62)は左右に並んで配置されることになる。
In the above-described embodiment, the pair of openings (61) and (62) are arranged vertically, but the present invention is not limited to this. The pair of openings (61) and (62) should be arranged side by side in substantially the same direction as the predetermined direction in which the air on the back side of the liquid crystal display panel (2) flows along the back side. By arranging the pair of openings (61) and (62) in this way, the air blower (70) operates and air on the back side of the liquid crystal display panel (2) flows in a predetermined direction along the back side. A part of the air passes through the upstream opening (61) and flows into the back side region (54) of the storage chamber (5), and the air flowing into the back side region (54) After passing through (54), it returns from the downstream opening (62) to the front side region (53) of the storage chamber (5).
Therefore, in the configuration in which the air on the back side of the liquid crystal display panel (2) flows sideways along the back side, the pair of openings (61) and (62) are arranged side by side.
上記実施形態において、板部材(６)には、一対の開口(61)(62)が複数箇所に設けられていてもよい。 In the above embodiment, the plate member (6) may be provided with a plurality of pairs of openings (61) and (62).
図３は、上記画像表示装置の第１変形例を示す鉛直断面図である。図３に示す様に、第１変形例に係る画像表示装置においては、一対の開口(61)(62)の内、上側の開口(61)の内側には第１送風装置(71)が配備され、下側の開口(62)の内側には第２送風装置(72)が配備されている。ここで、第１送風装置(71)は、その吸気側が収容室(５)の前面側領域(53)に向けられ、その排気側が収容室(５)の背面側領域(54)に向けられている。第２送風装置(72)は、その吸気側が収容室(５)の背面側領域(54)に向けられ、その排気側が収容室(５)の前面側領域(53)に向けられている。 FIG. 3 is a vertical sectional view showing a first modification of the image display device. As shown in FIG. 3, in the image display device according to the first modification, the first blower device (71) is arranged inside the upper opening (61) of the pair of openings (61) and (62). A second air blower (72) is provided inside the lower opening (62). Here, as for the 1st air blower (71), the inhalation | air_intake side is orient | assigned to the front side area | region (53) of a storage chamber (5), and the exhaust side is faced to the back side area | region (54) of a storage chamber (5). Yes. The second air blower (72) has its intake side directed to the rear side region (54) of the storage chamber (5) and its exhaust side directed to the front side region (53) of the storage chamber (5).
従って、第１送風装置(71)が動作することにより、収容室(５)の前面側領域(53)内の空気は、上側の開口(61)を通過して背面側領域(54)へ移動することになる。一方、第２送風装置(72)が動作することにより、収容室(５)の背面側領域(54)内の空気は、下側の開口(62)を通過して前面側領域(53)へ移動することになる。 Accordingly, when the first blower (71) is operated, the air in the front side region (53) of the storage chamber (5) passes through the upper opening (61) and moves to the back side region (54). Will do. On the other hand, when the second air blower (72) is operated, the air in the rear side region (54) of the storage chamber (5) passes through the lower opening (62) to the front side region (53). Will move.
上記第１変形例に係る画像表示装置によれば、第１送風装置(71)を動作させることにより、液晶表示パネル(２)の背面側を流れる空気の一部が、上側の開口(61)を通過して収容室(５)の背面側領域(54)へ流れ込み易くなる。又、第２送風装置(72)を動作させることにより、図３において二点鎖線矢印によって示す様に、上側の開口(61)から収容室(５)の背面側領域(54)へ流れ込んだ空気は、背面側領域(54)を通過して、下側の開口(62)から収容室(５)の前面側領域(53)へ戻り易くなる。従って、収容室(５)の背面側領域(54)には、冷却装置(４)によって冷却された空気の一部が通過し易くなる。よって、回路基板(22)は、効率良く冷却されることになる。 According to the image display device according to the first modified example, by operating the first air blower (71), a part of the air flowing on the back side of the liquid crystal display panel (2) is changed to the upper opening (61). And easily flows into the back side region (54) of the storage chamber (5). Further, by operating the second air blower (72), as shown by a two-dot chain line arrow in FIG. 3, the air that has flowed from the upper opening (61) into the back side region (54) of the storage chamber (5). Easily passes through the rear side region (54) and returns from the lower opening (62) to the front side region (53) of the storage chamber (5). Therefore, a part of the air cooled by the cooling device (4) easily passes through the rear side region (54) of the storage chamber (5). Therefore, the circuit board (22) is efficiently cooled.
図４は、上記画像表示装置の第２変形例を示す鉛直断面図である。図４に示す様に、第２変形例に係る画像表示装置においては、板部材(６)には、上側の開口(61)を開閉する第１蓋部材(81)が枢支されると共に、下側の開口(62)を開閉する第２蓋部材(82)が枢支されている。ここで、第１蓋部材(81)は、収容室(５)の背面側領域(54)の内側へ開くことが可能となる様に、板部材(６)に取り付けられている。第２蓋部材(82)は、収容室(５)の前面側領域(53)の内側へ開くことが可能となる様に、板部材(６)に取り付けられている。 FIG. 4 is a vertical sectional view showing a second modification of the image display device. As shown in FIG. 4, in the image display device according to the second modification, the plate member (6) is pivotally supported by a first lid member (81) that opens and closes the upper opening (61). A second lid member (82) for opening and closing the lower opening (62) is pivotally supported. Here, the 1st cover member (81) is attached to the board member (6) so that it can open to the inner side of the back side area | region (54) of a storage chamber (5). The second lid member (82) is attached to the plate member (6) so as to be able to open to the inside of the front side region (53) of the storage chamber (5).
又、収容室(５)の前面側領域(53)には、上側の開口(61)の近傍位置に第１送風装置(71)が配備され、収容室(５)の背面側領域(54)には、下側の開口(62)の近傍位置に第２送風装置(72)が配備されている。ここで、第１送風装置(71)は、その排気側を上側の開口(61)に向けて配置され、第２送風装置(72)は、その排気側を下側の開口(62)に向けて配置されている。 Further, in the front side region (53) of the storage chamber (5), a first blower device (71) is disposed in the vicinity of the upper opening (61), and the rear side region (54) of the storage chamber (5). The second air blower (72) is disposed near the lower opening (62). Here, the first blower (71) is arranged with its exhaust side facing the upper opening (61), and the second blower (72) has its exhaust side facing the lower opening (62). Are arranged.
従って、第１送風装置(71)が動作することにより、図５に示す様に、第１蓋部材(81)は、第１送風装置(71)からの風圧を受けて収容室(５)の背面側領域(54)の内側へ開くことになる。一方、第２送風装置(72)が動作することにより、図５に示す様に、第２蓋部材(82)は、第２送風装置(72)からの風圧を受けて収容室(５)の前面側領域(53)の内側へ開くことになる。 Accordingly, when the first blower (71) operates, as shown in FIG. 5, the first lid member (81) receives the wind pressure from the first blower (71) and receives the air pressure in the storage chamber (5). It opens to the inside of the back side region (54). On the other hand, when the second air blower (72) is operated, the second lid member (82) receives the wind pressure from the second air blower (72) as shown in FIG. It opens to the inside of the front side region (53).
図６に示す様に、上記第２変形例に係る画像表示装置は更に、収容室(５)の背面側領域(54)内の温度を検知する温度センサ(23)と、第１送風装置(71)と第２送風装置(72)の送風動作を制御する制御部(24)とを具えている。温度センサ(23)は、収容室(５)の背面側領域(54)内の温度を検知することにより、検知温度に応じて変化する温度情報を出力する。制御部(24)は、温度センサ(23)から出力される温度情報に基づいて、第１送風装置(71)と第２送風装置(72)の送風動作を制御する。 As shown in FIG. 6, the image display device according to the second modification further includes a temperature sensor (23) for detecting the temperature in the rear side region (54) of the storage chamber (5), and a first blower device ( 71) and a control unit (24) for controlling the air blowing operation of the second air blower (72). A temperature sensor (23) outputs the temperature information which changes according to detection temperature by detecting the temperature in the back side area | region (54) of a storage chamber (5). The control unit (24) controls the air blowing operation of the first air blower (71) and the second air blower (72) based on the temperature information output from the temperature sensor (23).
制御部(24)には、判断手段(241)と送風制御手段(242)とが含まれている。判断手段(241)は、温度センサ(23)から出力される温度情報に基づいて、収容室(５)の背面側領域(54)内の温度が所定の温度より高いか否かを判断する。送風制御手段(242)は、判断手段(241)により収容室(５)の背面側領域(54)内の温度が所定の温度より高いと判断されたとき、第１送風装置(71)と第２送風装置(72)に送風動作を実行させる一方、判断手段(241)により収容室(５)の背面側領域(54)内の温度が所定の温度より高くないと判断されたとき、第１送風装置(71)と第２送風装置(72)に送風動作を停止させる。
ここで、判断手段(241)の判断の基準となる所定の温度は、回路基板(22)に過熱による破損が生じ始めるときの収容室(５)の背面側領域(54)内の温度より低い温度に設定されている。
The control unit (24) includes a determination unit (241) and a ventilation control unit (242). Based on the temperature information output from the temperature sensor (23), the determination means (241) determines whether or not the temperature in the rear side region (54) of the storage chamber (5) is higher than a predetermined temperature. When the judgment means (241) determines that the temperature in the rear side region (54) of the storage chamber (5) is higher than a predetermined temperature, the air blow control means (242) is connected to the first blower (71) and the first blower (71). 2 When the air blower (72) is caused to perform the air blowing operation, when the determination means (241) determines that the temperature in the rear side region (54) of the storage chamber (5) is not higher than the predetermined temperature, the first The air blowing operation is stopped by the air blower (71) and the second air blower (72).
Here, the predetermined temperature, which is a criterion for determination by the determination means (241), is lower than the temperature in the rear side region (54) of the storage chamber (5) when the circuit board (22) starts to be damaged by overheating. The temperature is set.
上記第２変形例に係る画像表示装置によれば、収容室(５)の背面側領域(54)内の温度が所定の温度より高くなると、第１送風装置(71)と第２送風装置(72)の送風動作が実行される。これにより、図５に示す様に、第１蓋部材(81)と第２蓋部材(82)が開いて、一対の開口(61)(62)が露出することになる。 According to the image display device according to the second modified example, when the temperature in the rear side region (54) of the storage chamber (5) becomes higher than a predetermined temperature, the first blower (71) and the second blower ( 72) The air blowing operation is executed. Accordingly, as shown in FIG. 5, the first lid member (81) and the second lid member (82) are opened, and the pair of openings (61) and (62) are exposed.
よって、図５において二点鎖線矢印によって示す様に、液晶表示パネル(２)の背面側を流れる空気の一部が、上側の開口(61)を通過して収容室(５)の背面側領域(54)へ流れ込み、流れ込んだ空気は、背面側領域(54)を通過して、下側の開口(62)から収容室(５)の前面側領域(53)へ戻ることになる。従って、収容室(５)の背面側領域(54)には、冷却装置(４)によって冷却された空気の一部が通過することになる。その結果、背面側領域(54)内の温度上昇が抑制されて、熱による回路基板(22)の破損が防止されることになる。 Therefore, as shown by a two-dot chain line arrow in FIG. 5, a part of the air flowing on the back side of the liquid crystal display panel (2) passes through the upper opening (61) and the rear side region of the storage chamber (5). The air that has flowed into (54) passes through the rear side region (54) and returns from the lower opening (62) to the front side region (53) of the storage chamber (5). Therefore, a part of the air cooled by the cooling device (4) passes through the rear side region (54) of the storage chamber (5). As a result, the temperature rise in the back side region (54) is suppressed, and damage to the circuit board (22) due to heat is prevented.
一方、第１送風装置(71)と第２送風装置(72)の送風動作により収容室(５)の背面側領域(54)内の温度が所定の温度より低くなると、第１送風装置(71)と第２送風装置(72)の送風動作が停止される。よって、第１送風装置(71)と第２送風装置(72)の送風動作が背面側領域(54)内の温度の高低に拘わらず継続して実行される画像表示装置に比べて、消費電力が少なくて済む。
On the other hand, when the temperature in the back side region (54) of the storage chamber (5) becomes lower than a predetermined temperature by the blowing operation of the first blower (71) and the second blower (72), the first blower (71 ) And the
又、第１送風装置(71)と第２送風装置(72)の送風動作が停止されると、図４に示す様に、第１蓋部材(81)と第２蓋部材(82)が閉じて、一対の開口(61)(62)が塞がれることになる。従って、収容室(５)の前面側領域(53)と背面側領域(54)との間での空気の移動が、両蓋部材(81)(82)によって阻止されることになる。よって、収容室(５)の前面側領域(53)内の空気が、冷却装置(４)によって効率良く冷却されることになり、その結果、液晶表示パネル(２)の温度が低下し易くなる。
When the air blowing operation of the
尚、本発明の各部構成は上記実施の形態に限らず、特許請求の範囲に記載の技術的範囲内で種々の変形が可能である。例えば、上記画像表示装置に採用した各種構成は、液晶表示パネル(２)を具えた画像表示装置に限らず、プラズマ表示パネルや有機ＥＬ（Electro-Luminescence）表示パネル等、種々の画像表示パネルを具えた画像表示装置に適用することが出来る。 In addition, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim. For example, the various configurations employed in the image display device are not limited to the image display device including the liquid crystal display panel (2), but include various image display panels such as a plasma display panel and an organic EL (Electro-Luminescence) display panel. It can be applied to the provided image display device.
(１) 筐体
(10) 画像表示窓
(２) 液晶表示パネル（画像表示パネル）
(21) 画面
(22) 回路基板
(23) 温度センサ
(24) 制御部（制御手段）
(241) 判断手段
(242) 送風制御手段
(４) 冷却装置（冷却手段）
(５) 収容室
(50) 循環流路
(51) 収容室を形成する前面壁
(52) 収容室を形成する背面壁
(53) 前面側領域
(54) 背面側領域
(６) 板部材
(61) 上側の開口
(62) 下側の開口
(70) 送風装置（送風手段）
(71) 第１送風装置
(72) 第２送風装置
(81) 第１蓋部材
(82) 第２蓋部材
(1) Case
(10) Image display window
(2) Liquid crystal display panel (image display panel)
(21) Screen
(22) Circuit board
(23) Temperature sensor
(24) Control unit (control means)
(241) Judgment means
(242) Air flow control means
(4) Cooling device (cooling means)
(5) Containment room
(50) Circulation channel
(51) Front wall forming the containment chamber
(52) Back wall forming the containment chamber
(53) Front side area
(54) Rear side area
(6) Plate member
(61) Upper opening
(62) Lower opening
(70) Blower (blower means)
(71) First blower
(72) Second blower
(81) First lid member
(82) Second lid member
Claims (4)
前記収容室は、板部材によって、該収容室を形成する前面壁に沿う前面側領域と、該収容室を形成する背面壁に沿う背面側領域とに仕切られ、収容室の前面側領域に前記画像表示パネルが配備される一方、収容室の背面側領域に前記回路基板が配備され、前記冷却手段は収容室の前面側領域内の空気を冷却するものであり、前記収容室の前面側領域には更に、前記画像表示パネルの背面側の空気を該背面に沿って所定の方向へ流す送風手段が配備され、前記板部材には、前記所定の方向と略同一の方向に並んだ一対の開口が形成されていることを特徴とする画像表示装置。 A storage chamber having a sealed structure; and cooling means for cooling air in the storage chamber. The storage chamber stores an image display panel and a circuit board for controlling the operation of the image display panel. In the image display device in which an image display window facing the screen of the image display panel is provided on the front wall forming the storage chamber,
The storage chamber is partitioned by a plate member into a front side region along the front wall forming the storage chamber and a back side region along the back wall forming the storage chamber. While the image display panel is provided, the circuit board is provided in the rear side region of the storage chamber, and the cooling means cools the air in the front side region of the storage chamber. Further, air blowing means is provided for flowing air on the back side of the image display panel in a predetermined direction along the back surface, and the plate member has a pair of lines arranged in a direction substantially the same as the predetermined direction. An image display device having an opening formed therein.
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| US12/894,944 US8248784B2 (en) | 2009-09-30 | 2010-09-30 | Display apparatus |
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| JP2009226909A JP5415206B2 (en) | 2009-09-30 | 2009-09-30 | Image display device |
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