JP2012191562A - Circuit humidity adjustment device and liquid crystal television - Google Patents

Circuit humidity adjustment device and liquid crystal television Download PDF

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JP2012191562A
JP2012191562A JP2011055366A JP2011055366A JP2012191562A JP 2012191562 A JP2012191562 A JP 2012191562A JP 2011055366 A JP2011055366 A JP 2011055366A JP 2011055366 A JP2011055366 A JP 2011055366A JP 2012191562 A JP2012191562 A JP 2012191562A
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humidity control
unit
communication
circuit board
desiccant
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Yasuhisa Nogami
康久 野上
Takeshi Shibata
健 柴田
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Sharp Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a technology for realizing humidity control inside an electronic apparatus and suppressing migration of a circuit board.SOLUTION: When a liquid crystal television 10 is turned on, a ventilation opening/closing lid 50 is shifted to a predetermined position so that an external ventilation opening 47 of a bottom surface 46 matches with a bottom surface lid ventilation opening 57, which makes a drying system housing part 49 communicate with the outside. The heat of a lamp module 22 is supplied to a desiccant 70 via a heat sink 60, so that the water content being absorbed in the desiccant 70 is evaporated and released to the outside. When the liquid crystal television 10 is turned off, an internal ventilation opening 42 of a case partition wall 41 matches with an upper surface lid ventilation part 52, so that a circuit housing part 48 communicates with the drying system housing part 49. The water content contained in the circuit housing part 48 is absorbed into the desiccant 70 through a communication opening formed from the internal ventilation opening 42 and the upper surface lid ventilation opening 52.

Description

本発明は、回路湿度調整装置および液晶テレビに係り、例えば回路基板を備える電子機器の回路湿度調整装置およびそのような回路湿度調整装置を備えた液晶テレビに関する。   The present invention relates to a circuit humidity adjusting device and a liquid crystal television, and more particularly, to a circuit humidity adjusting device for an electronic apparatus including a circuit board, and a liquid crystal television including such a circuit humidity adjusting device.

東南アジア等の諸国でも所得が上がり、また、液晶テレビのコストも下がってきており、液晶テレビの需要は全世界のあらゆる地域に広がりを見せている。これらの国のなかには、高温多湿に加え、空気中に含まれる物質によって非常に高い飽和蒸気圧となる地域があることが分かってきた。   In Southeast Asia and other countries, incomes have risen, and LCD TV costs have fallen, and demand for LCD TVs is spreading throughout the world. In these countries, it has been found that in addition to high temperature and humidity, there is a region where the saturation vapor pressure is very high due to substances contained in the air.

一般に、テレビやDVDプレーヤ、プロジェクタ等の電子機器は高湿度状態に弱い傾向がある。したがって、湿度が低い状態で使用されることが好ましいと言える。   In general, electronic devices such as televisions, DVD players, and projectors tend to be vulnerable to high humidity conditions. Therefore, it can be said that it is preferable to be used in a low humidity state.

湿度を管理する技術としては、例えば、形状記憶合金を用いて、防湿庫の過乾燥を防ぐ技術が開示されている（特許文献１参照）。   As a technique for managing humidity, for example, a technique for preventing overdrying of a moisture-proof cabinet using a shape memory alloy is disclosed (see Patent Document 1).

特開平７−３２８３７２号公報JP 7-328372 A

ところで、近年の液晶テレビ等の電子機器内部の回路部品は微細化され、高密度、高精細となってきており、マイグレーションによる、回路動作の不具合の可能性は以前より高くなってきている。   By the way, circuit components inside electronic devices such as liquid crystal televisions in recent years have been miniaturized and have become high density and high definition, and the possibility of circuit operation failures due to migration has become higher than before.

一般には、ある程度高い湿度であっても、所望の性能を維持できるように、信頼性試験を行っている。しかしながら、上述のように、東南アジアのような地域では、高温多湿の気候に加えて、空気中に含まれる物質を特定することは現実的に不可能である。このため、通常の信頼性試験では回避できない事態が起こる可能性が出てきている。これらの悪条件下でも、確実に回路を動作させる技術が求められていた。特殊な状況で使用される前提の製品の中には湿度管理がなされるものも存在するが、そのような製品では管理対象部品等が厳重に封密される構成となっている。したがって、液晶テレビ等の家電量販製品である電子機器に適用するには必ずしも現実的な技術ではなかった。そのため、湿度管理が可能となる新たな技術が求められていた。また、特許文献１に開示の技術を用いることで、製品全体を収容して湿度管理をすることはできるが、家電製品にそのまま適用できず、別の技術が求められていた。   In general, a reliability test is performed so that desired performance can be maintained even at high humidity. However, as described above, in regions such as Southeast Asia, it is practically impossible to specify substances contained in the air in addition to the hot and humid climate. For this reason, there is a possibility that a situation that cannot be avoided by a normal reliability test has occurred. There has been a demand for a technique for reliably operating a circuit even under these adverse conditions. Some presupposed products used in special situations are subject to humidity control, but such products are configured so that the parts to be managed are tightly sealed. Therefore, it has not always been a practical technique to be applied to an electronic device that is a mass-produced home appliance such as a liquid crystal television. Therefore, a new technology that enables humidity management has been demanded. Moreover, by using the technique disclosed in Patent Document 1, it is possible to accommodate the entire product and manage the humidity, but it cannot be applied to home appliances as it is, and another technique has been demanded.

本発明の目的は、上記課題に鑑み、電子機器内部の湿度管理を実現し、回路基板のマイグレーションを抑制する技術を提供するものである。   In view of the above problems, an object of the present invention is to provide a technique for realizing humidity management inside an electronic device and suppressing migration of a circuit board.

本発明に係る回路湿度調整装置は、電子機器の回路基板を収容する回路基板収容手段と、水分を吸湿する乾燥剤及び前記乾燥剤を加熱し吸湿した水分を蒸発可能とする加熱手段とを有する調湿手段と、前記調湿手段を収容する調湿手段収容手段と、前記回路基板収容手段と前記調湿手段収容手段とを連通状態又は非連通状態に切り換える第１の連通切替手段と、前記調湿手段収容手段と外部とを連通状態と非連通状態とに切り換える第２の連通切替手段と、を備え、前記電子機器がオンのとき、前記第１の連通切替手段は前記回路基板収容部と前記調湿手段収容手段とを非連通状態とするとともに、前記第２の連通切替手段は前記調湿手段収容手段と外部とを連通状態とし、前記乾燥剤を加熱し、前記電子機器がオフのとき、前記第１の連通切替手段は前記回路基板収容手段と前記調湿手段収容手段とを連通状態とするとともに、前記第２の連通切替手段は前記調湿手段収容手段と外部とを非連通状態とする。
また、前記回路基板収容手段と前記調湿手段収容手段とは、仕切り手段によって空間的に分離されており、前記仕切り手段は、前記回路基板収容手段と前記調湿手段収容手段とを連通する第１の連通口を備え、前記第１の連通切替手段は、前記第１の連通口を開閉することで、前記回路基板収容手段と前記調湿手段収容手段の連通状態を切り換えてもよい。
また、前記調湿手段収容手段は外部と連通する第２の連通口を備え、前記第２の連通切替手段は、前記第２の連通口を開閉することで、前記調湿手段収容手段の連通状態を切り換えてもよい。
また、前記第１の連通切替手段と前記第２の連通切替手段は、一体で構成されてもよい。
また、前記加熱手段は、発熱部品の熱を前記乾燥剤に伝熱することで前記乾燥剤を加熱してもよい。
本発明の液晶テレビは、液晶表示パネルと、回路基板と、前記回路基板の回路湿度調整とを備え、前記回路湿度調整は、前記回路基板を収容する回路基板収容手段と、水分を吸湿する乾燥剤及び前記乾燥剤を加熱し吸湿した水分を蒸発可能とする加熱手段とを有する調湿手段と、前記調湿手段を収容する調湿手段収容手段と、前記回路基板収容手段と前記調湿手段収容手段とを連通状態又は非連通状態に切り換える第１の連通切替手段と、前記調湿手段収容手段と外部とを連通状態と非連通状態とに切り換える第２の連通切替手段と、を備え、前記加熱手段は、前記液晶表示パネルの熱を伝導する金属部材であって、前記乾燥剤は前記金属部材に取り付けられており、電源がオンのとき、前記第１の連通切替手段は前記回路基板収容部と前記調湿手段収容手段とを非連通状態とするとともに、前記第２の連通切替手段は前記調湿手段収容部と外部とを連通状態とし、前記乾燥剤を加熱し、電源がオフのとき、前記第１の連通切替手段は前記回路基板収容手段と前記調湿手段収容手段とを連通状態とするとともに、前記第２の連通切替手段は前記調湿手段収容手段と外部とを非連通状態とする。 A circuit humidity adjusting apparatus according to the present invention includes a circuit board housing unit that houses a circuit board of an electronic device, a desiccant that absorbs moisture, and a heating unit that heats the desiccant to evaporate the absorbed moisture. Humidity control means; humidity control means storage means for storing the humidity control means; first communication switching means for switching the circuit board storage means and the humidity control means storage means to a communication state or a non-communication state; Second communication switching means for switching the humidity control means accommodating means and the outside between a communication state and a non-communication state, and when the electronic device is on, the first communication switching means is the circuit board accommodation portion. And the humidity control means housing means are in a non-communication state, and the second communication switching means is in a communication state between the humidity control means accommodation means and the outside, heating the desiccant and turning off the electronic device. At the time of the first communication With the replacement means communicating state and the humidity means accommodating means and the circuit board housing means, said second connection switching means to the outside and the humidity means accommodating means a non-communicating state.
The circuit board accommodation means and the humidity control means accommodation means are spatially separated by a partition means, and the partition means communicates the circuit board accommodation means and the humidity control means accommodation means. The first communication switching unit may switch the communication state between the circuit board housing unit and the humidity control unit housing unit by opening and closing the first communication port.
Further, the humidity control means accommodating means includes a second communication port communicating with the outside, and the second communication switching means opens and closes the second communication port, thereby communicating the humidity control means accommodation means. The state may be switched.
Further, the first communication switching unit and the second communication switching unit may be configured integrally.
The heating means may heat the desiccant by transferring heat of the heat-generating component to the desiccant.
The liquid crystal television of the present invention includes a liquid crystal display panel, a circuit board, and a circuit humidity adjustment of the circuit board. The circuit humidity adjustment is performed by a circuit board housing means for housing the circuit board, and by drying to absorb moisture. Humidity control means having heating means and heating means for heating the desiccant to evaporate moisture absorbed, humidity control means storage means for storing the humidity control means, circuit board storage means, and humidity control means First communication switching means for switching the housing means to a communication state or a non-communication state; and a second communication switching means for switching the humidity control means housing means and the outside to a communication state and a non-communication state, The heating means is a metal member that conducts heat of the liquid crystal display panel, and the desiccant is attached to the metal member. When the power is on, the first communication switching means is the circuit board. Containment section and said The second communication switching unit brings the humidity control unit storage unit and the outside into a communication state, heats the desiccant, and turns off the power when the power supply is turned off. The first communication switching unit brings the circuit board housing unit and the humidity control unit housing unit into a communication state, and the second communication switching unit brings the humidity control unit housing unit and the outside into a non-communication state.

本発明によれば、電子機器内部の湿度管理を実現し、回路基板のマイグレーションを抑制する技術を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the technique which implement | achieves humidity management inside an electronic device and suppresses the migration of a circuit board can be provided.

本実施形態に係る、液晶テレビの外観および断面構造を示す図である。It is a figure which shows the external appearance and sectional structure of the liquid crystal television based on this embodiment. 本実施形態に係る、液晶テレビの機能ブロック図である。It is a functional block diagram of the liquid crystal television based on this embodiment. 本実施形態に係る、調湿機能付き回路装置の概略配置を示す図である。It is a figure which shows schematic arrangement | positioning of the circuit apparatus with a humidity control function based on this embodiment. 本実施形態に係る、調湿機能付き回路装置の断面構成を示す図である。It is a figure which shows the cross-sectional structure of the circuit apparatus with a humidity control function based on this embodiment. 本実施形態に係る、図４の断面構成の一部領域を拡大して示す図である。It is a figure which expands and shows the partial area | region of the cross-sectional structure of FIG. 4 based on this embodiment. 本実施形態に係る、回路調湿装置の表示パネルへ取付状態を示す図である。It is a figure which shows an attachment state to the display panel of the circuit humidity control apparatus based on this embodiment. 本実施形態の変形例に係る、液晶テレビの外観および断面構造を示す図である。It is a figure which shows the external appearance and sectional structure of a liquid crystal television based on the modification of this embodiment.

次に、本発明を実施するための形態を、図面を参照して具体的に説明する。本実施形態の概要は、以下の通りである。
（１）液晶テレビは、湿度管理したい部分（回路基板等）を、密閉できる構造を有する。
（２）動作時に液晶テレビ内部にランプモジュール、ＬＥＤ、電源回路などの高温となる部分を有することから、動作時に発生する熱によって、液晶テレビ内部に配置された乾燥剤に含まれる水分を蒸発させる。
（３）液晶テレビの動作時には、乾燥剤と湿度管理したい部分とは隔離され、乾燥剤に含まれる水分を蒸発させる。
（４）液晶テレビの非動作時には、乾燥剤と湿度管理したい部分との通気が確保され、かつ、乾燥剤と湿度管理したい部分は外部から隔離された状態を保つ。そして、乾燥剤により、湿度管理したい部分の湿度を低く保つことができる。
このような機能を有することで、予期しないような高温・高湿常置においても、湿度に弱い回路基板等を低湿度状態に管理することができ、高信頼性製品を提供することが可能となる。以下、詳細に説明する。 Next, embodiments for carrying out the present invention will be specifically described with reference to the drawings. The outline of the present embodiment is as follows.
(1) The liquid crystal television has a structure capable of sealing a portion (circuit board or the like) where humidity control is desired.
(2) Since the liquid crystal television has a high temperature portion such as a lamp module, LED, and power supply circuit during operation, moisture contained in the desiccant disposed inside the liquid crystal television is evaporated by heat generated during operation. .
(3) During operation of the liquid crystal television, the desiccant is separated from the portion whose humidity is to be controlled, and the moisture contained in the desiccant is evaporated.
(4) When the liquid crystal television is not in operation, ventilation between the desiccant and the portion whose humidity is to be controlled is ensured, and the desiccant and the portion whose humidity is to be controlled are kept isolated from the outside. And the humidity of the part which wants to carry out humidity control can be kept low with a desiccant.
By having such a function, it is possible to manage a circuit board or the like that is sensitive to humidity in a low humidity state even in unexpected high temperature and high humidity, and to provide a highly reliable product. . Details will be described below.

図１は、本実施形態に係る液晶テレビ１０であり、図１（ａ）は外観を示し、図１（ｂ）は断面構造を示している。表示パネル２０や各種の回路基板３５、さらに回路調湿装置３０を備え、キャビネット１９（１９ａ、１９ｂ）に覆われている。この液晶テレビ１０では、表示パネル２０がフロントキャビネット１９ｂとリアキャビネット１９ａに覆われ且つ回路調湿装置３０が表示パネル２０の背面に取り付けられる例を示している。そして、一部の回路基板３５は、回路調湿装置３０の内部に配置され、その近傍の湿度が抑制されるように調整される。この回路調湿装置３０を用いることで、その回路基板３５にマイグレーション等の不具合が発生しないようになっている。また、表示パネル２０は、ランプモジュール２２、液晶パネル９２、反射シート９３を備え、それらはパネル・シールドケース９１に覆われ収納されている。   FIG. 1 shows a liquid crystal television 10 according to the present embodiment. FIG. 1 (a) shows an external appearance, and FIG. 1 (b) shows a cross-sectional structure. The display panel 20, various circuit boards 35, and a circuit humidity control device 30 are provided, and are covered with a cabinet 19 (19a, 19b). In the liquid crystal television 10, an example is shown in which the display panel 20 is covered by a front cabinet 19 b and a rear cabinet 19 a and the circuit humidity control device 30 is attached to the back surface of the display panel 20. And some circuit boards 35 are arrange | positioned inside the circuit humidity control apparatus 30, and the humidity of the vicinity is adjusted so that it may be suppressed. By using this circuit humidity control device 30, problems such as migration do not occur in the circuit board 35. The display panel 20 includes a lamp module 22, a liquid crystal panel 92, and a reflective sheet 93, which are covered and housed in a panel / shield case 91.

図２は、液晶テレビ１０の概略構成を示す機能ブロック図であり、主に回路基板３５周囲の湿度調整機能に着目して示している。液晶テレビ１０は、一般的な機能として、チューナ１１と、コンテンツ処理部１２と、表示パネル２０を有する表示出力部１３と、音声出力部１４と、操作制御部１５とを備え、さらにそれら構成要素を統括的に制御する主制御部１６を備える。これら構成要素は一般的なものであるので説明は省略する。   FIG. 2 is a functional block diagram showing a schematic configuration of the liquid crystal television 10 and mainly shows the humidity adjustment function around the circuit board 35. As a general function, the liquid crystal television 10 includes a tuner 11, a content processing unit 12, a display output unit 13 having a display panel 20, an audio output unit 14, and an operation control unit 15. Is provided with a main control unit 16 that controls the entire system. Since these components are general, description thereof will be omitted.

さらに、液晶テレビ１０は、本実施形態の特徴的な機能である回路基板３５の調湿機能を実現する構成として、密閉ケース駆動部１７と調湿機能付き回路装置３０とを備える。密閉ケース駆動部１７は、ソレノイド１７ａで構成されており、ソレノイド１７ａへの電流のオンオフによって、通気開閉用蓋５０をプル（引く）、プッシュ（押す）することで、通気開閉用蓋５０の位置を変えるものである。回路調湿装置３０は、密閉ケース４０と、通気開閉用蓋５０と、ヒートシンク６０と、乾燥剤７０と、を備える。本実施形態では、密閉ケース４０の内部に、コンテンツ処理部１２を構成する回路基板３５が収容される。   Furthermore, the liquid crystal television 10 includes a sealed case drive unit 17 and a circuit device 30 with a humidity control function as a configuration for realizing the humidity control function of the circuit board 35 which is a characteristic function of the present embodiment. The hermetic case drive unit 17 is configured by a solenoid 17a, and the position of the ventilation opening / closing lid 50 is determined by pulling (pushing) and pushing (pushing) the ventilation opening / closing lid 50 by turning on / off the current to the solenoid 17a. Is something that changes. The circuit humidity control apparatus 30 includes a sealed case 40, a ventilation opening / closing lid 50, a heat sink 60, and a desiccant 70. In the present embodiment, the circuit board 35 constituting the content processing unit 12 is accommodated in the sealed case 40.

さらに、密閉ケース４０には、通気開閉用蓋５０が取り付けられる。この通気開閉用蓋５０は、密閉ケース駆動部１７によって駆動制御され、後述する密閉ケース４０の内部通気口４２や外部通気口４７の開閉を行って、回路基板３５が収容された空間の湿度を適正に調整する。湿度調整のために、ここでは、乾燥剤７０及びヒートシンク６０が備わる。ヒートシンク６０の一部は、ランプモジュール２２に密着し、ランプ点灯時のランプモジュール２２の熱の一部をヒートシンク６０の全体に伝える。液晶テレビ１０がオフしているときに、乾燥剤７０に水分が吸収される。液晶テレビ１０がオンしているときには、ランプモジュール２２のランプの熱をヒートシンク６０を介して乾燥剤７０に供給し、乾燥剤７０に吸収されている水分が蒸発する。蒸発した水分は、密閉ケース４０の外部で出て、さらに、図１（ｂ）に示すように、液晶テレビ１０のキャビネット１９の放熱用穴１９ｄ等から液晶テレビ１０の外に放出される。乾燥剤７０として、例えばシリカゲル等の湿気の吸収、放出を可逆的に行える乾燥剤を用いることができる。   Further, a ventilation opening / closing lid 50 is attached to the sealed case 40. This air opening / closing lid 50 is driven and controlled by the airtight case drive unit 17 to open and close an internal air vent 42 and an external air vent 47 of the airtight case 40 which will be described later, thereby controlling the humidity of the space in which the circuit board 35 is accommodated. Adjust appropriately. In order to adjust the humidity, a desiccant 70 and a heat sink 60 are provided here. A part of the heat sink 60 is in close contact with the lamp module 22, and transmits a part of the heat of the lamp module 22 when the lamp is lit to the entire heat sink 60. Moisture is absorbed by the desiccant 70 when the liquid crystal television 10 is off. When the liquid crystal television 10 is on, the heat of the lamp of the lamp module 22 is supplied to the desiccant 70 via the heat sink 60, and the moisture absorbed in the desiccant 70 evaporates. The evaporated water comes out of the sealed case 40 and is further discharged outside the liquid crystal television 10 through the heat radiation holes 19d of the cabinet 19 of the liquid crystal television 10 as shown in FIG. As the desiccant 70, for example, a desiccant capable of reversibly absorbing and releasing moisture such as silica gel can be used.

図３は、回路調湿装置３０の配置を示す。また、図４に、回路調湿装置３０の構造を断面図で示し、図４（ａ）は図３（ａ）のＸ−Ｘ断面、図４（ｂ）は図３（ｂ）のＹ−Ｙ断面を示している。さらに、図５に図４の一部拡大図を示しており、図５（ａ）は図４（ａ）の一部領域Ａ１を示し、図５（ｂ）は図４（ｂ）の一部領域Ａ２を示している。なお、図３（ａ）、図４（ａ）及び図５（ａ）は、液晶テレビ１０がオンしているときの状態を示している。一方、図３（ｂ）、図４（ｂ）及び図５（ｂ）は、液晶テレビ１０がオフしているときの状態を示している。さらに、図６に、回路調湿装置３０と表示パネル２０の関係を模式的に示す。図６（ａ）は、回路調湿装置３０が表示パネル２０に取り付けられている例を示し、図６（ｂ）は、その斜視図を示している。   FIG. 3 shows the arrangement of the circuit humidity control device 30. FIG. 4 is a sectional view showing the structure of the circuit humidity control device 30. FIG. 4A is a sectional view taken along line XX in FIG. 3A, and FIG. The Y cross section is shown. 5 shows a partially enlarged view of FIG. 4, FIG. 5 (a) shows a partial region A1 of FIG. 4 (a), and FIG. 5 (b) shows a part of FIG. 4 (b). Region A2 is shown. 3A, 4A, and 5A show a state when the liquid crystal television 10 is turned on. On the other hand, FIG. 3B, FIG. 4B, and FIG. 5B show states when the liquid crystal television 10 is off. Further, FIG. 6 schematically shows the relationship between the circuit humidity control device 30 and the display panel 20. 6A shows an example in which the circuit humidity control device 30 is attached to the display panel 20, and FIG. 6B shows a perspective view thereof.

回路調湿装置３０は、ランプモジュール２２の背面に配置され、その一部であるヒートシンクの一部はランプモジュール２２に密着させている。本例では、ランプモジュール２２への設置を行っているが、液晶テレビ１０の内部の熱源を利用できる位置であれば電源回路等の他の基板付近でもよいし、図７の変形例で後述するように、キャビネット１９（特に、リアキャビネット１９ａ）に取り付けられてもよい。   The circuit humidity control device 30 is disposed on the back surface of the lamp module 22, and a part of the heat sink as a part thereof is in close contact with the lamp module 22. In this example, the lamp module 22 is installed. However, it may be near another substrate such as a power supply circuit as long as the heat source inside the liquid crystal television 10 can be used, and will be described later with a modification of FIG. Thus, it may be attached to the cabinet 19 (particularly, the rear cabinet 19a).

図４に示すように、密閉ケース４０は、図示で上下２段に内部の空間をケース仕切壁４１によって分離されている。上側の空間である回路収容部４８には、回路基板３５が収容され密閉される。下側の空間である乾燥システム収容部４９には、ヒートシンク６０及び乾燥剤７０が収容される。ヒートシンク６０は、ランプモジュール２２の熱を乾燥システム収容部４９の内部に導入するために、下面の一部をランプモジュール２２に対向するように露出させている。また、上面６２の略全面に、乾燥剤７０が取り付けられている。   As shown in FIG. 4, the sealed case 40 has an internal space separated into two upper and lower stages by a case partition wall 41. The circuit board 35 is housed and sealed in the circuit housing portion 48 which is the upper space. The heat sink 60 and the desiccant 70 are accommodated in the drying system accommodating portion 49 that is the lower space. The heat sink 60 exposes a part of its lower surface so as to face the lamp module 22 in order to introduce the heat of the lamp module 22 into the drying system housing 49. A desiccant 70 is attached to substantially the entire upper surface 62.

さらに、ケース仕切壁４１には、回路収容部４８と乾燥システム収容部４９を連通する内部通気口４２が複数形成されている。さらに、底面４６にも同様に、乾燥システム収容部４９とランプモジュール２２側の外部とを連通する外部通気口４７が複数形成されている。外部通気口４７は、最終的に水蒸気を液晶テレビ１０の外に排出することが目的であるから、ランプモジュール２２側にこだわる必要はない。   Further, the case partition wall 41 is formed with a plurality of internal vent holes 42 that allow the circuit housing portion 48 and the drying system housing portion 49 to communicate with each other. Further, similarly, a plurality of external vent holes 47 are formed on the bottom surface 46 to communicate the drying system accommodating portion 49 and the outside on the lamp module 22 side. The external vent 47 is intended to finally discharge water vapor out of the liquid crystal television 10, and therefore does not need to stick to the lamp module 22 side.

通気開閉用蓋５０は、ケース仕切壁４１に形成された内部通気口４２と底面４６に形成された外部通気口４７の開閉を行う機能を有する。通気開閉用蓋５０は、図示で、断面逆コ字状に形成されており、蓋上面５１がケース仕切壁４１の上面を覆う様に、また、蓋底面５６が密閉ケース４０の底面４６の下側を覆うように、密閉ケース４０の左側面から挿入されている。   The air opening / closing lid 50 has a function of opening and closing an internal air vent 42 formed in the case partition wall 41 and an external air vent 47 formed in the bottom surface 46. The ventilation opening / closing lid 50 is formed in an inverted U-shaped cross section in the drawing, so that the lid upper surface 51 covers the upper surface of the case partition wall 41, and the lid bottom surface 56 is below the bottom surface 46 of the sealed case 40. It is inserted from the left side surface of the sealing case 40 so as to cover the side.

通気開閉用蓋５０において、蓋上面５１には上面蓋通気口５２が複数形成されており、同様に、蓋底面５６には底面蓋通気口５７が複数形成されている。そして、密閉ケース駆動部１７が、通気開閉用蓋５０を密閉ケース４０への挿入量を調整するように左右に動かすことで、ケース仕切壁４１に形成された内部通気口４２と底面４６に形成された外部通気口４７の開閉を行う。密閉ケース駆動部１７は、ソレノイド１７ａで構成されており、液晶テレビ１０の電源が入っている時は、ソレノイド１７ａに電流が流れ、その磁力によって、ソレノイド１７ａの中空部にある鉄心がソレノイド側に引っ張られ、鉄心が接続された通気開閉用蓋５０が密閉ケース駆動部１７方向に移動する。液晶テレビ１０の電源が切れている時は、ソレノイド内のばねによって鉄心が押し出され、鉄心が接続された通気開閉用蓋５０が密閉ケース駆動部１７と対向する方向に移動する。   In the vent opening / closing lid 50, a plurality of top lid vent holes 52 are formed on the lid top surface 51, and similarly, a plurality of bottom lid vent holes 57 are formed on the lid bottom surface 56. Then, the airtight case driving unit 17 moves the airflow opening / closing lid 50 left and right so as to adjust the amount of insertion into the airtight case 40, thereby forming the internal vent 42 and the bottom surface 46 formed in the case partition wall 41. The opened external vent 47 is opened and closed. The sealed case drive unit 17 is composed of a solenoid 17a. When the liquid crystal television 10 is turned on, a current flows through the solenoid 17a, and the magnetic core causes the iron core in the hollow portion of the solenoid 17a to move toward the solenoid. The ventilation opening / closing lid 50 pulled and connected with the iron core moves in the direction of the sealed case drive unit 17. When the power of the liquid crystal television 10 is turned off, the iron core is pushed out by the spring in the solenoid, and the ventilation opening / closing lid 50 to which the iron core is connected moves in a direction facing the sealed case drive unit 17.

具体的には、液晶テレビ１０がオン操作されると、操作制御部１５がその旨を主制御部１６に通知する。そして、主制御部１６は、密閉ケース駆動部１７に指示して、通気開閉用蓋５０を図３（ａ）、図４（ａ）及び図５（ａ）に示す位置に移動させる。   Specifically, when the liquid crystal television 10 is turned on, the operation control unit 15 notifies the main control unit 16 to that effect. Then, the main control unit 16 instructs the sealed case driving unit 17 to move the ventilation opening / closing lid 50 to the position shown in FIGS. 3 (a), 4 (a), and 5 (a).

より詳細には、図４（ａ）や図５（ａ）に示すように、通気開閉用蓋５０が所定の位置に移動して底面４６の外部通気口４７と底面蓋通気口５７とが一致すると、乾燥システム収容部４９が外部と連通した状態になる。   More specifically, as shown in FIGS. 4 (a) and 5 (a), the vent opening / closing lid 50 moves to a predetermined position so that the external vent 47 on the bottom 46 and the bottom lid vent 57 coincide. Then, the drying system accommodating part 49 will be in the state connected with the exterior.

このとき、ケース仕切壁４１の内部通気口４２と上面蓋通気部５２は一致せず、蓋上面５１は内部通気口４２を閉じた状態となる。この状態においては、液晶テレビ１０はオンしていることから、ランプモジュール２２の熱がヒートシンク６０を介して乾燥剤７０に供給される。その結果、乾燥剤７０に吸収されている水分が蒸発し、外部通気口４７及び底面蓋通気口５７とで形成される連通口から、蒸発した水分が乾燥システム収容部４９の外部に放出される。さらに、液晶テレビ１０のキャビの放熱用の穴等から液晶テレビ１０の外部に放出される。   At this time, the internal vent 42 of the case partition wall 41 and the upper surface cover ventilation part 52 do not coincide with each other, and the upper surface 51 of the cover is in a state where the internal ventilation hole 42 is closed. In this state, since the liquid crystal television 10 is on, the heat of the lamp module 22 is supplied to the desiccant 70 through the heat sink 60. As a result, the moisture absorbed in the desiccant 70 evaporates, and the evaporated moisture is discharged from the communication port formed by the external vent 47 and the bottom lid vent 57 to the outside of the drying system housing 49. . Further, the liquid crystal television 10 is discharged to the outside of the liquid crystal television 10 through a cavity for heat dissipation or the like.

一方、液晶テレビ１０がオフ操作されると、操作制御部１５がその旨を主制御部１６に通知する。そして、主制御部１６は、密閉ケース駆動部１７に指示、具体的には密閉ケース駆動部１７内のソレノイド１７ａへの電流を遮断して、通気開閉用蓋５０を図３（ｂ）、図４（ｂ）及び図５（ｂ）に示す位置に移動する。   On the other hand, when the liquid crystal television 10 is turned off, the operation control unit 15 notifies the main control unit 16 to that effect. Then, the main control unit 16 instructs the sealed case drive unit 17, specifically, interrupts the current to the solenoid 17 a in the sealed case drive unit 17, and opens the ventilation opening / closing lid 50 in FIG. 4 (b) and the position shown in FIG. 5 (b).

より詳細には、図４（ｂ）や図５（ｂ）に示すように、通気開閉用蓋５０が所定の位置に移動してケース仕切壁４１の内部通気口４２と上面蓋通気部５２とが一致すると、回路収容部４８と乾燥システム収容部４９とが連通した状態になる。   More specifically, as shown in FIG. 4B and FIG. 5B, the ventilation opening / closing lid 50 moves to a predetermined position, and the internal vent 42 of the case partition wall 41 and the top lid ventilation portion 52 If they match, the circuit housing portion 48 and the drying system housing portion 49 are in communication with each other.

このとき、外部通気口４７と底面蓋通基部５７は一致せず、蓋底面５６は外部通気口４７を閉じた状態になる。この状態においては、液晶テレビ１０はオフした状態にありランプモジュール２２等の熱が乾燥剤７０に供給されることはない。また、乾燥システム収容部４９と外部とは遮断され、回路収容部４８と乾燥システム収容部４９が連通状態になっている。したがって、回路収容部４８に含まれる水分が内部通気口４２及び上面蓋通気口５２で形成される連通口を通って乾燥剤７０に吸収される。その結果、回路基板３５（コンテンツ処理部１２）の近傍は、湿度が低く調整される。その結果、湿度に起因するマイグレーション等の不具合発生を防止することができる。また、通気開閉用蓋５０に、内部通気口４２と外部通気口４７の開閉を行う機能を一体に持たせたことで、開閉動作の機構がシンプルに実現することができる。   At this time, the external vent 47 and the bottom lid through base 57 do not coincide with each other, and the lid bottom 56 closes the external vent 47. In this state, the liquid crystal television 10 is in an off state, and heat from the lamp module 22 or the like is not supplied to the desiccant 70. Moreover, the drying system accommodating part 49 and the exterior are interrupted | blocked, and the circuit accommodating part 48 and the drying system accommodating part 49 are in a communication state. Therefore, the moisture contained in the circuit housing portion 48 is absorbed by the desiccant 70 through the communication port formed by the internal vent 42 and the top lid vent 52. As a result, the humidity in the vicinity of the circuit board 35 (content processing unit 12) is adjusted to be low. As a result, problems such as migration due to humidity can be prevented. Further, since the ventilation opening / closing lid 50 is integrally provided with the function of opening and closing the internal ventilation port 42 and the external ventilation port 47, the mechanism of the opening / closing operation can be realized simply.

以上、本発明を実施形態をもとに説明した。この実施形態は例示であり、それらの各構成要素や各処理プロセスの組み合わせにいろいろな変形例が可能なこと、またそうした変形例も本発明の範囲にあることは当業者に理解されるところである。例えば、通気開閉用蓋５０を密閉ケース駆動部１７で動作制御したが、これに限る趣旨ではない。例えば、液晶テレビ１０に備わる電源ボタンに機械的に連動する機構を採用することで、動作するように構成されてもよい。   The present invention has been described based on the embodiments. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to combinations of the respective constituent elements and processing processes, and such modifications are also within the scope of the present invention. . For example, the ventilation opening / closing lid 50 is controlled by the hermetic case drive unit 17, but the present invention is not limited to this. For example, it may be configured to operate by adopting a mechanism that mechanically interlocks with a power button provided in the liquid crystal television 10.

さらに、液晶テレビ１０がオフしている期間が長いと、乾燥剤７０の吸湿量が飽和状態に近くなり吸湿性能が低下してしまう恐れがある。そこで、所定時間ごとに、ヒートシンク６０を加熱すると共に通気開閉用蓋５０を動かし水分を外部に放出するようにしてもよい。また、上面蓋通気口５２と外部通気口４７が独立して動くようにしてもよい。また、乾燥剤７０への熱供給源としてランプモジュール２２（ヒートシンク６０）を用いたがこれに限る趣旨ではない。比較的高温になり且つ乾燥剤７０を加熱するために十分な熱量を発する部品であればよい。さらに、専用のヒータ等の熱源が用いられてもよい。専用のヒータが用いられる場合、液晶テレビ１０がオフしている期間の水分放出機能をより効果的に実行できる。また、回路基板３５の密閉は、電源オンのときのみ、つまり、乾燥剤７０で乾燥システム収容部４９の水分を吸収するときのみとしてもよい。回路基板３５の発熱量が比較的大きいような場合には、電源オンのときに密閉せずに解放した状態とすることが望ましいときもある。また、そのような場合、回路基板３５の周囲の湿度が、不適切な環境になるまで高まることが少ないと考えられるためである。   Furthermore, if the liquid crystal television 10 is turned off for a long time, the moisture absorption amount of the desiccant 70 is close to the saturated state, and the moisture absorption performance may be deteriorated. Therefore, the heat sink 60 may be heated and the ventilation opening / closing lid 50 may be moved at every predetermined time to release moisture to the outside. Further, the top lid vent 52 and the external vent 47 may be moved independently. Further, the lamp module 22 (heat sink 60) is used as a heat supply source to the desiccant 70, but the present invention is not limited to this. Any component may be used as long as it is relatively hot and emits a sufficient amount of heat to heat the desiccant 70. Furthermore, a heat source such as a dedicated heater may be used. When a dedicated heater is used, it is possible to more effectively execute the moisture release function during the period when the liquid crystal television 10 is off. The circuit board 35 may be sealed only when the power is turned on, that is, when the moisture in the drying system accommodating portion 49 is absorbed by the desiccant 70. When the amount of heat generated by the circuit board 35 is relatively large, it may be desirable to release the circuit board 35 without sealing it when the power is turned on. In such a case, it is considered that the humidity around the circuit board 35 is unlikely to increase until an inappropriate environment is obtained.

また、ヒートシンク６０は、必ずしもランプモジュール２２に密着する必要はなく、熱源となるランプモジュール２２からの熱が所望に伝達可能に配置されていればよい。図７に示す変形例では、液晶テレビ１０ｂの回路調湿装置３０がリアキャビネット１９ａに取り付けられ、ヒートシンク６０が表示パネル２０の背面に対向して所定距離離間して配置されている。そして、表示パネル２０の背面には、ランプモジュール２２の熱を排出してヒートシンク６０に伝熱するため、ヒートシンク６０の露出部分に対向する領域に開口が設けられている。   Further, the heat sink 60 does not necessarily need to be in close contact with the lamp module 22, and may be disposed so that heat from the lamp module 22 serving as a heat source can be transmitted as desired. In the modification shown in FIG. 7, the circuit humidity control device 30 of the liquid crystal television 10 b is attached to the rear cabinet 19 a, and the heat sink 60 is disposed facing the back surface of the display panel 20 and separated by a predetermined distance. An opening is provided on the back surface of the display panel 20 in a region facing the exposed portion of the heat sink 60 in order to discharge heat of the lamp module 22 and transfer the heat to the heat sink 60.

１０ 液晶テレビ
１７ 密閉ケース駆動部
１７ａ ソレノイド
１９ キャビネット
１９ａ リアキャビネット
１９ｂ フロントキャビネット
１９ｄ 放熱用穴
２０ 表示パネル
２２ ランプモジュール
３０ 回路調湿装置
３５ 回路基板
４０ 密閉ケース
４１ ケース仕切壁
４２ 内部通気口
４６ 底面
４７ 外部通気口
４８ 回路収容部
４９ 乾燥システム収容部
５０ 通気開閉用蓋
５１ 蓋上面
５２ 上面蓋通気口
５６ 蓋底面
５７ 底面蓋通気口
６０ ヒートシンク
７０ 乾燥剤 10 LCD TV 17 Sealed Case Drive Unit 17a Solenoid 19 Cabinet 19a Rear Cabinet 19b Front Cabinet 19d Heat Dissipation Hole 20 Display Panel 22 Lamp Module 30 Circuit Humidity Control Device 35 Circuit Board 40 Sealed Case 41 Case Partition Wall 42 Internal Vent 46 46 Bottom 47 External ventilation port 48 Circuit housing part 49 Drying system housing part 50 Ventilation opening / closing lid 51 Top surface 52 Top surface air vent 56 Top surface 57 Bottom air surface 60 Heat sink 70 Desiccant

Claims (6)

電子機器の回路基板を収容する回路基板収容手段と、
水分を吸湿する乾燥剤及び前記乾燥剤を加熱し吸湿した水分を蒸発可能とする加熱手段とを有する調湿手段と、
前記調湿手段を収容する調湿手段収容手段と、
前記回路基板収容手段と前記調湿手段収容手段とを連通状態又は非連通状態に切り換える第１の連通切替手段と、
前記調湿手段収容手段と外部とを連通状態と非連通状態とに切り換える第２の連通切替手段と、
を備え、
前記電子機器がオンのとき、前記第１の連通切替手段は前記回路基板収容手段と前記調湿手段収容手段とを非連通状態とするとともに、前記第２の連通切替手段は前記調湿手段収容手段と外部とを連通状態とし、前記乾燥剤を加熱し、
前記電子機器がオフのとき、前記第１の連通切替手段は前記回路基板収容手段と前記調湿手段収容手段とを連通状態とするとともに、前記第２の連通切替手段は前記調湿手段収容手段と外部とを非連通状態とする
ことを特徴とする回路湿度調整装置。 Circuit board housing means for housing the circuit board of the electronic device;
A humidity control means comprising a desiccant that absorbs moisture, and a heating means that heats the desiccant to evaporate the moisture absorbed.
Humidity control means storage means for storing the humidity control means;
First communication switching means for switching the circuit board accommodation means and the humidity control means accommodation means to a communication state or a non-communication state;
Second communication switching means for switching the humidity control means housing means and the outside between a communication state and a non-communication state;
With
When the electronic device is on, the first communication switching unit places the circuit board housing unit and the humidity control unit housing unit in a non-communication state, and the second communication switching unit stores the humidity control unit. Means and communication with the outside, heating the desiccant,
When the electronic device is off, the first communication switching unit brings the circuit board housing unit and the humidity control unit housing unit into a communication state, and the second communication switching unit is the humidity control unit housing unit. A circuit humidity adjusting device characterized in that the circuit and the outside are not in communication. 前記回路基板収容手段と前記調湿手段収容手段とは、仕切り手段によって空間的に分離されており、
前記仕切り手段は、前記回路基板収容手段と前記調湿手段収容手段とを連通する第１の連通口を備え、
前記第１の連通切替手段は、前記第１の連通口を開閉することで、前記回路基板収容手段と前記調湿手段収容手段の連通状態を切り換えることを特徴とする請求項１に記載の回路湿度調整装置。 The circuit board housing means and the humidity control means housing means are spatially separated by a partitioning means,
The partition unit includes a first communication port that communicates the circuit board housing unit and the humidity control unit housing unit.
2. The circuit according to claim 1, wherein the first communication switching unit switches a communication state between the circuit board housing unit and the humidity control unit housing unit by opening and closing the first communication port. 3. Humidity adjustment device. 前記調湿手段収容手段は外部と連通する第２の連通口を備え、
前記第２の連通切替手段は、前記第２の連通口を開閉することで、前記調湿手段収容手段の連通状態を切り換えることを特徴とする請求項１または２に記載の回路湿度調整装置。 The humidity control means accommodating means includes a second communication port communicating with the outside,
3. The circuit humidity adjusting device according to claim 1, wherein the second communication switching unit switches a communication state of the humidity control unit housing unit by opening and closing the second communication port. 4. 前記第１の連通切替手段と前記第２の連通切替手段は、一体で構成されていることを特徴とする請求項１から３までのいずれかに記載の回路湿度調整装置。   4. The circuit humidity adjusting device according to claim 1, wherein the first communication switching unit and the second communication switching unit are integrally formed. 5. 前記加熱手段は、発熱部品の熱を前記乾燥剤に伝熱することで前記乾燥剤を加熱することを特徴とする請求項１から４までのいずれかに記載の回路湿度調整装置。   5. The circuit humidity adjusting device according to claim 1, wherein the heating unit heats the desiccant by transferring heat of a heat generating component to the desiccant. 6. 液晶表示パネルと、
回路基板と、
前記回路基板の回路湿度調整とを備え、
前記回路湿度調整は、
前記回路基板を収容する回路基板収容手段と、
水分を吸湿する乾燥剤及び前記乾燥剤を加熱し吸湿した水分を蒸発可能とする加熱手段とを有する調湿手段と、
前記調湿手段を収容する調湿手段収容手段と、
前記回路基板収容手段と前記調湿手段収容手段とを連通状態又は非連通状態に切り換える第１の連通切替手段と、
前記調湿手段収容手段と外部とを連通状態と非連通状態とに切り換える第２の連通切替手段と、
を備え、
前記加熱手段は、前記液晶表示パネルの熱を伝導する金属部材であって、前記乾燥剤は前記金属部材に取り付けられており、
電源がオンのとき、前記第１の連通切替手段は前記回路基板収容手段と前記調湿手段収容手段とを非連通状態とするとともに、前記第２の連通切替手段は前記調湿手段収容部と外部とを連通状態とし、前記乾燥剤を加熱し、
電源がオフのとき、前記第１の連通切替手段は前記回路基板収容手段と前記調湿手段収容手段とを連通状態とするとともに、前記第２の連通切替手段は前記調湿手段収容手段と外部とを非連通状態とする
ことを特徴とする液晶テレビ。 A liquid crystal display panel;
A circuit board;
Circuit humidity adjustment of the circuit board,
The circuit humidity adjustment is
Circuit board housing means for housing the circuit board;
A humidity control means comprising a desiccant that absorbs moisture, and a heating means that heats the desiccant to evaporate the moisture absorbed.
Humidity control means storage means for storing the humidity control means;
First communication switching means for switching the circuit board accommodation means and the humidity control means accommodation means to a communication state or a non-communication state;
Second communication switching means for switching the humidity control means housing means and the outside between a communication state and a non-communication state;
With
The heating means is a metal member that conducts heat of the liquid crystal display panel, and the desiccant is attached to the metal member,
When the power is on, the first communication switching unit brings the circuit board housing unit and the humidity control unit housing unit into a non-communication state, and the second communication switching unit is configured to communicate with the humidity control unit housing unit. The outside is in a communication state, the desiccant is heated,
When the power is off, the first communication switching unit brings the circuit board housing unit and the humidity control unit housing unit into communication with each other, and the second communication switching unit is connected to the humidity control unit housing unit and the outside. LCD TV, characterized in that it is in a non-communication state.
JP2011055366A 2011-03-14 2011-03-14 Circuit humidity adjustment device and liquid crystal television Pending JP2012191562A (en)

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