JPH1164877A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPH1164877A JPH1164877A JP23028697A JP23028697A JPH1164877A JP H1164877 A JPH1164877 A JP H1164877A JP 23028697 A JP23028697 A JP 23028697A JP 23028697 A JP23028697 A JP 23028697A JP H1164877 A JPH1164877 A JP H1164877A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- display panel
- control circuit
- flexible printed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/181—Printed circuits structurally associated with non-printed electric components associated with surface mounted components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/36—Assembling printed circuits with other printed circuits
- H05K3/361—Assembling flexible printed circuits with other printed circuits
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は液晶表示装置に関
し、さらに詳しく言えば、温度補償を行なうための温度
検知素子の取付構造に関するものである。[0001] 1. Field of the Invention [0002] The present invention relates to a liquid crystal display device, and more particularly, to a structure for mounting a temperature sensing element for performing temperature compensation.
【０００２】[0002]
【従来の技術】実際の製品形態としての液晶表示装置
は、図４の断面図に例示されているように、上面に表示
窓１１を有する箱形のハウジング１０を備えており、そ
の表示窓１１に沿って液晶表示パネル２０が配置されて
いる。2. Description of the Related Art A liquid crystal display device as an actual product form is provided with a box-shaped housing 10 having a display window 11 on the upper surface, as shown in the sectional view of FIG. The liquid crystal display panel 20 is arranged along the line.
【０００３】また、ハウジング１０内には液晶表示パネ
ル２０とともに、その制御回路基板３０が液晶表示パネ
ル２０の裏面側に配置され、この例では、さらに液晶表
示パネル２０と制御回路基板３０との間にバックライト
４０が配置されている。なお、液晶表示パネル２０と制
御回路基板３０はフレキシブル印刷配線板５０により電
気的に接続されている。In the housing 10, a liquid crystal display panel 20 and a control circuit board 30 for the liquid crystal display panel are arranged on the back side of the liquid crystal display panel 20, and in this example, the liquid crystal display panel 20 and the control circuit board 30 Is provided with a backlight 40. The liquid crystal display panel 20 and the control circuit board 30 are electrically connected by a flexible printed wiring board 50.
【０００４】[0004]
【発明が解決しようとする課題】ところで、液晶の表示
を適正に保つには、その周辺温度に応じて印加する駆動
電圧を変えて温度補償する必要がある。そのため、ノー
トパソコン等の用途では、外部に設置したボリュームを
使用者が手動で調整し好みの表示に合わせるようにする
ことが多いが、手動による煩雑な調整を避けた用途の場
合には、自動的に温度補償を行なうために周辺温度検知
用の温度検知素子を備えている。By the way, in order to properly maintain the display of the liquid crystal, it is necessary to compensate the temperature by changing the driving voltage applied in accordance with the surrounding temperature. For this reason, in applications such as notebook computers, the user often adjusts the volume installed externally to match the desired display. A temperature detecting element for detecting an ambient temperature is provided for performing temperature compensation in a specific manner.
【０００５】多くの場合、温度検知素子としてサーミス
タＴＨが用いられるが、従来においては、もっぱら取り
つけ易さの点から、そのサーミスタＴＨを制御回路基板
３０に実装するようにしている。In many cases, a thermistor TH is used as a temperature detecting element. Conventionally, however, the thermistor TH is mounted on the control circuit board 30 only from the viewpoint of easy installation.
【０００６】しかしながら、この取付位置ではサーミス
タＴＨはバックライト４０からの発熱により徐々に加熱
されることになるため、本来検知すべき液晶表示パネル
２０の周辺温度を正確に検知することができない。However, in this mounting position, the thermistor TH is gradually heated by the heat generated from the backlight 40, so that the ambient temperature of the liquid crystal display panel 20, which should be originally detected, cannot be accurately detected.
【０００７】ちなみに、バックライト４０に冷陰極管
（ＣＦＬ）を用いても４０〜５０℃程度の発熱があり、
また、装置の小型化に伴なってバックライト４０と制御
回路基板３０の間が狭められる傾向にあるため、上記の
問題がますます顕著になる。Incidentally, even if a cold cathode fluorescent lamp (CFL) is used for the backlight 40, it generates heat of about 40 to 50 ° C.,
In addition, since the space between the backlight 40 and the control circuit board 30 tends to be narrowed with the miniaturization of the device, the above-mentioned problem becomes more prominent.
【０００８】さらに、制御回路基板３０にバックライト
４０を駆動するインバータ回路や昇圧トランスなどの発
熱体がある場合には、サーミスタＴＨはそれによっても
加熱されることになる。Further, when a heating element such as an inverter circuit for driving the backlight 40 or a step-up transformer is provided on the control circuit board 30, the thermistor TH is also heated by the heating element.
【０００９】本発明は、このような課題を解決するため
になされたもので、その目的は、より正確に液晶表示パ
ネルの周辺温度を検知することができるようにした液晶
表示装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a liquid crystal display device capable of more accurately detecting the peripheral temperature of a liquid crystal display panel. It is in.
【００１０】[0010]
【課題を解決するための手段】上記目的を達成するた
め、本発明は、表示窓を有するハウジングと、同ハウジ
ングの表示窓に沿って設けられた液晶表示パネルと、上
記ハウジング内において上記液晶表示パネルの裏面側に
配置された制御回路基板とを含み、上記液晶表示パネル
と上記制御回路基板とが、上記ハウジングの側壁内面に
沿って引き回されるフレキシブル印刷配線板を介して電
気的に接続されている液晶表示装置において、上記フレ
キシブル印刷配線板に温度補償用の温度検知素子が実装
されていることを特徴としている。In order to achieve the above object, the present invention provides a housing having a display window, a liquid crystal display panel provided along the display window of the housing, and a liquid crystal display in the housing. A control circuit board disposed on a back side of the panel, wherein the liquid crystal display panel and the control circuit board are electrically connected to each other via a flexible printed wiring board routed along an inner surface of a side wall of the housing. In the liquid crystal display device described above, a temperature detecting element for temperature compensation is mounted on the flexible printed wiring board.
【００１１】このように、温度検知素子を制御回路基板
ではなく、フレキシブル印刷配線板に実装するようにし
たことにより、バックライトや制御回路基板上の発熱部
品からの温度検知素子に対する熱的影響が大幅に低減さ
れる。また、フレキシブル印刷配線板の所定の配線に温
度検知素子を接続することにより、既存の構成を最小限
手直しすることで済ませることができる。As described above, since the temperature detecting element is mounted not on the control circuit board but on the flexible printed wiring board, a thermal influence on the temperature detecting element from a backlight or a heat-generating component on the control circuit board is reduced. It is greatly reduced. In addition, by connecting the temperature detecting element to a predetermined wiring of the flexible printed wiring board, the existing configuration can be reduced to a minimum.
【００１２】本発明において、温度検知素子はフレキシ
ブル印刷配線板のハウジングの側壁内面と対向する面側
に実装されるのが好ましく、これによれば、フレキシブ
ル印刷配線板自体が遮熱体となるため、温度検知素子を
より効果的に発熱体から保護することができる。In the present invention, the temperature detecting element is preferably mounted on the surface of the flexible printed wiring board facing the inner surface of the side wall of the housing. According to this, the flexible printed wiring board itself becomes a heat shield. In addition, the temperature detecting element can be more effectively protected from the heating element.
【００１３】[0013]
【発明の実施の形態】次に、本発明の技術的思想をより
よく理解するうえで、図１ないし図３に基づいてその好
適な実施例について説明する。なお、この実施例におい
て、先に説明した図４の構成と同一もしくは同一と見な
してよい部分にはそれと同じ参照符号が用いられてい
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to FIGS. 1 to 3 in order to better understand the technical concept of the present invention. Note that, in this embodiment, the same reference numerals are used for portions that are the same as or can be regarded as the same as the configuration of FIG. 4 described above.
【００１４】図１はこの実施例における液晶表示装置の
図４と同様の断面図であるが、図２は同液晶表示装置の
内部をその左側面から透視した左側面図、図３は同液晶
表示装置から液晶表示パネル２０を取り外した状態での
平面図である。FIG. 1 is a sectional view similar to FIG. 4 of the liquid crystal display device in this embodiment, FIG. 2 is a left side view of the inside of the liquid crystal display device seen from the left side, and FIG. FIG. 4 is a plan view in a state where the liquid crystal display panel 20 is removed from the display device.
【００１５】この実施例においても、ハウジング１０内
には液晶表示パネル２０がその表示窓１１に沿って配置
され、その裏面側にバックライト４０と制御回路基板３
０とが配置されている。Also in this embodiment, a liquid crystal display panel 20 is arranged along a display window 11 in a housing 10, and a backlight 40 and a control circuit board 3 are provided on the back side thereof.
0 is arranged.
【００１６】液晶表示パネル２０と制御回路基板３０
は、フレキシブル印刷配線板５０により電気的に接続さ
れているが、この実施例において、フレキシブル印刷配
線板５０には、第１の印刷配線板５１と第２の印刷配線
板５２とを接続したものが用いられている。Liquid crystal display panel 20 and control circuit board 30
Are electrically connected by a flexible printed wiring board 50. In this embodiment, the first printed wiring board 51 and the second printed wiring board 52 are connected to the flexible printed wiring board 50. Is used.
【００１７】第１の印刷配線板５１側の一端には、制御
回路基板３０に設けられているコネクタ３１に差し込ま
れるカードエッジ型の端子５１ａが設けられており、第
２の印刷配線板５２側の他端は図示しない例えば異方性
導電コネクタを介して液晶表示パネル２０の端子部に接
続される。At one end on the first printed wiring board 51 side, a card edge type terminal 51a to be inserted into the connector 31 provided on the control circuit board 30 is provided, and on the second printed wiring board 52 side. Is connected to a terminal portion of the liquid crystal display panel 20 via, for example, an anisotropic conductive connector (not shown).
【００１８】すなわち、フレキシブル印刷配線板５０
は、制御回路基板３０のコネクタ３１からハウジング１
０の側壁内面に沿って引き回されて、液晶表示パネル２
０の端子部に至るが、本発明によると、このフレキシブ
ル印刷配線板５０に温度検知素子としてのサーミスタＴ
Ｈが実装されている。That is, the flexible printed wiring board 50
From the connector 31 of the control circuit board 30 to the housing 1
0 along the inner surface of the side wall of the liquid crystal display panel 2.
0, according to the present invention, the flexible printed wiring board 50 is provided with a thermistor T as a temperature detecting element.
H has been implemented.
【００１９】この実施例では、サーミスタＴＨは第１の
印刷配線板５１側に取り付けられているが、第２の印刷
配線板５２側に取り付けられてもよい。いずれにして
も、サーミスタＴＨが発熱体としてのバックライト４０
や制御回路基板３０の発熱部品から遠ざけられるため、
それらからの熱的影響が低減され、液晶表示パネル２０
の周辺により近い温度の検出が可能となる。In this embodiment, the thermistor TH is mounted on the first printed wiring board 51 side, but may be mounted on the second printed wiring board 52 side. In any case, the thermistor TH serves as a backlight 40 as a heating element.
And the heating components of the control circuit board 30
The thermal influence from them is reduced, and the liquid crystal display panel 20
, It is possible to detect a temperature that is closer to the periphery.
【００２０】なお、サーミスタＴＨをフレキシブル印刷
配線板５０に実装するにあたっては、図１に示されてい
るように、ハウジング１０の側壁内面と対向する面側
（ハウジングの内部中央から見てフレキシブル印刷配線
板５０の外側面）に取り付けることが好ましく、これに
よれば、フレキシブル印刷配線板５０自体が遮熱体とな
り、サーミスタＴＨに対するバックライト４０やその他
の発熱部品からの熱的影響がより効果的に低減される。When the thermistor TH is mounted on the flexible printed wiring board 50, as shown in FIG. It is preferable that the flexible printed wiring board 50 itself be a heat shield, so that the thermal effect of the backlight 40 and other heat-generating components on the thermistor TH is more effective. Reduced.
【００２１】また、フレキシブル印刷配線板５０に形成
されている多数の配線の中から所定の配線を選んで、サ
ーミスタＴＨをその配線上に実装することにより、新た
に温度検知信号用の配線を引き回す必要もなく、最小限
の設計変更で済ませることができる。Further, a predetermined wiring is selected from among a large number of wirings formed on the flexible printed wiring board 50, and the thermistor TH is mounted on the wiring, so that a wiring for a temperature detection signal is newly routed. There is no need to do so with minimal design changes.
【００２２】[0022]
【発明の効果】以上説明したように、本発明によれば、
温度補償用の温度検知素子を、液晶表示パネルとその制
御回路基板とを接続するフレキシブル印刷配線板に実装
するようにしたことにより、温度検知素子に対するバッ
クライトや制御回路基板上の発熱部品からの熱的影響が
大幅に低減され、液晶表示パネルの周辺により近い温度
の検出が可能となる。As described above, according to the present invention,
The temperature sensing element for temperature compensation is mounted on the flexible printed circuit board that connects the liquid crystal display panel and its control circuit board. Thermal effects are greatly reduced, and a temperature closer to the periphery of the liquid crystal display panel can be detected.
【００２３】また、フレキシブル印刷配線板の所定の配
線上に温度検知素子を実装することにより、新たに温度
検知信号用の配線を引き回す必要もなく、最小限の設計
変更で対応することができる。Further, by mounting the temperature detecting element on the predetermined wiring of the flexible printed wiring board, it is not necessary to newly arrange the wiring for the temperature detecting signal, and it is possible to cope with the minimum design change.
【００２４】さらには、温度検知素子をフレキシブル印
刷配線板のハウジングの側壁内面と対向する面側に実装
することにより、フレキシブル印刷配線板自体が遮熱体
となるため、温度検知素子をより効果的に発熱体から保
護することができる。Further, by mounting the temperature detecting element on the surface of the flexible printed wiring board facing the inner surface of the side wall of the housing, the flexible printed wiring board itself becomes a heat shield, so that the temperature detecting element can be more effectively used. Can be protected from the heating element.
【図１】本発明の一実施例としての液晶表示装置を示し
た断面図。FIG. 1 is a sectional view showing a liquid crystal display device as one embodiment of the present invention.
【図２】上記実施例の液晶表示装置の内部を透視した左
側面図。FIG. 2 is a left side view in which the inside of the liquid crystal display device of the embodiment is seen through.
【図３】上記実施例の液晶表示装置から液晶表示パネル
を取り外してその内部を透視した平面図。FIG. 3 is a plan view of the liquid crystal display device of the embodiment, in which a liquid crystal display panel is removed and the inside thereof is seen through.
【図４】従来例としての液晶表示装置を示した断面図。FIG. 4 is a sectional view showing a liquid crystal display device as a conventional example.
１０ ハウジング １１ 表示窓 ２０ 液晶表示パネル ３０ 制御回路基板 ４０ バックライト ５０ フレキシブル印刷配線板 ＴＨ 温度検知素子（サーミスタ） Reference Signs List 10 housing 11 display window 20 liquid crystal display panel 30 control circuit board 40 backlight 50 flexible printed wiring board TH temperature detecting element (thermistor)
Claims (2)
ングの表示窓に沿って設けられた液晶表示パネルと、上
記ハウジング内において上記液晶表示パネルの裏面側に
配置された制御回路基板とを含み、上記液晶表示パネル
と上記制御回路基板とが、上記ハウジングの側壁内面に
沿って引き回されるフレキシブル印刷配線板を介して電
気的に接続されている液晶表示装置において、上記フレ
キシブル印刷配線板に温度補償用の温度検知素子が実装
されていることを特徴とする液晶表示装置。1. A housing having a display window, a liquid crystal display panel provided along the display window of the housing, and a control circuit board disposed on the back side of the liquid crystal display panel in the housing. In a liquid crystal display device in which the liquid crystal display panel and the control circuit board are electrically connected via a flexible printed wiring board routed along an inner surface of a side wall of the housing, the flexible printed wiring board has a temperature. A liquid crystal display device comprising a temperature detecting element for compensation.
印刷配線板の上記ハウジングの側壁内面と対向する面側
に実装されている請求項１に記載の液晶表示装置。2. The liquid crystal display device according to claim 1, wherein the temperature detecting element is mounted on a surface of the flexible printed wiring board facing an inner surface of a side wall of the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23028697A JP3778394B2 (en) | 1997-08-12 | 1997-08-12 | Liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23028697A JP3778394B2 (en) | 1997-08-12 | 1997-08-12 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1164877A true JPH1164877A (en) | 1999-03-05 |
| JP3778394B2 JP3778394B2 (en) | 2006-05-24 |
Family
ID=16905441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23028697A Expired - Fee Related JP3778394B2 (en) | 1997-08-12 | 1997-08-12 | Liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3778394B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009210848A (en) * | 2008-03-05 | 2009-09-17 | Mitsubishi Electric Corp | Lcd module, liquid crystal display, and manufacturing method of liquid crystal display |
| CN105070261A (en) * | 2015-08-26 | 2015-11-18 | 武汉华星光电技术有限公司 | Liquid crystal display module group and voltage adjusting method thereof |
-
1997
- 1997-08-12 JP JP23028697A patent/JP3778394B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009210848A (en) * | 2008-03-05 | 2009-09-17 | Mitsubishi Electric Corp | Lcd module, liquid crystal display, and manufacturing method of liquid crystal display |
| CN105070261A (en) * | 2015-08-26 | 2015-11-18 | 武汉华星光电技术有限公司 | Liquid crystal display module group and voltage adjusting method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3778394B2 (en) | 2006-05-24 |
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