JPS61120191A - Liquid crystal dot matrix unit - Google Patents
Liquid crystal dot matrix unitInfo
- Publication number
- JPS61120191A JPS61120191A JP24188084A JP24188084A JPS61120191A JP S61120191 A JPS61120191 A JP S61120191A JP 24188084 A JP24188084 A JP 24188084A JP 24188084 A JP24188084 A JP 24188084A JP S61120191 A JPS61120191 A JP S61120191A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- dot matrix
- matrix unit
- insulating resin
- crystal dot
- 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.)
- Pending
Links
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
く技術分野〉
この発明は不要輻射ノイズを低減するようにした液晶ド
ツトマトリクスユニットに関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a liquid crystal dot matrix unit that reduces unnecessary radiation noise.
く従来の技術〉
一般に、液晶ドツトマトリクスユニットは、第２図に示
すような構造をしており、プリント基板１、プラスチッ
クのシャーシ２．液晶表示装置３゜ベッセル４．フレキ
シブル基板５および液晶表示装置３の駆動回路としての
大規模集積回路（ＬＳＩ）６からなる。BACKGROUND TECHNOLOGY Generally, a liquid crystal dot matrix unit has a structure as shown in FIG. 2, which includes a printed circuit board 1, a plastic chassis 2. Liquid crystal display device 3° vessel 4. It consists of a flexible substrate 5 and a large scale integrated circuit (LSI) 6 as a drive circuit for the liquid crystal display device 3.
このような液晶ドツトマトリクスユニットは、図示しな
いコンピュータ等の端末として使用される場合、高速信
号で動作するため、電子機器の正常な動作を妨げる不要
輻射ノイズを発生し、いわゆる電磁障害を生じるという
問題がある。When such a liquid crystal dot matrix unit is used as a terminal for a computer (not shown), etc., because it operates with high-speed signals, it generates unnecessary radiation noise that interferes with the normal operation of electronic equipment, causing so-called electromagnetic interference. There is.
このような電磁障害に関しては、米国のＦＣＣ（連邦通
信委ｒ会）、西独のＶＤＥ （ＶｅｒｂａｎｄＤｅｕｔ
ｓｃｈｅｒ Ｅｌｅｃｔｒｏｔｅｃｈｎｉｋｅｒ ）
、Ｃｌ５ＳＲ（国際無線通信委員会）等の機関により規
制されており、電磁障害を少なくすることが必要である
。Regarding such electromagnetic interference, the FCC (Federal Communications Commission) of the United States, the VDE (Verband Deut.
scher Electrotechniker)
, Cl5SR (International Radiocommunication Commission) and other organizations, and it is necessary to reduce electromagnetic interference.
〈発明の目的〉
そこで、この発明の目的は、液晶ドツトマトリクスユニ
ットからの不要な輻射ノイズの発生を防止することであ
る。<Object of the Invention> Therefore, an object of the present invention is to prevent unnecessary radiation noise from being generated from a liquid crystal dot matrix unit.
〈発明の構成〉
上記目的を達成するため、この発明の液晶ドツトマトリ
クスユニットは、液晶表示装置の駆動回路を装着したプ
リント基板を絶縁性樹脂で被覆し、さらに上記絶縁性樹
脂を導電材料で被覆して、この導電材料を接地するよう
にしたことを特徴としている。<Structure of the Invention> In order to achieve the above object, the liquid crystal dot matrix unit of the present invention is provided by coating a printed circuit board on which a driving circuit of a liquid crystal display device is mounted with an insulating resin, and further coating the insulating resin with a conductive material. This conductive material is then grounded.
〈実施例〉 以下、この発明を図示の実施例により詳細に説明する。<Example> Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.
第１図において、１はプリント基板、２はプラスチック
のシャーシ、３は液晶表示装置、４はベッセル、５は７
レキシプル基板、６は液晶表示装置３の駆動回路として
のＬＳＩであって、これらは従来例と同じ構成をしてい
る。In Figure 1, 1 is a printed circuit board, 2 is a plastic chassis, 3 is a liquid crystal display device, 4 is a vessel, and 5 is a 7
The Lexiple board 6 is an LSI serving as a drive circuit for the liquid crystal display device 3, and these have the same configuration as the conventional example.
上記ＬＳＩ６およびプリント基板１を紫外線硬化樹脂、
エポキシ樹脂、フェノール樹脂等の絶縁性樹脂７で被覆
し、さらにこの絶縁性樹脂７の表面に導電材料の一例と
してのカーボンペースト等の導電塗料８を塗布する。そ
して、この導電材料８をベッセル４に接続して、このベ
ッセル４が装着される図示しない７レームに接続する。The above LSI 6 and printed circuit board 1 are made of ultraviolet curing resin.
It is coated with an insulating resin 7 such as an epoxy resin or a phenol resin, and a conductive paint 8 such as carbon paste as an example of a conductive material is applied to the surface of the insulating resin 7. Then, this conductive material 8 is connected to the vessel 4, and connected to seven frames (not shown) on which this vessel 4 is mounted.
すなわち、導電塗料８を７レームグランドに接続する。That is, the conductive paint 8 is connected to the 7-layer ground.
このように、ノイズ源であるプリント基板１およ（／Ｌ
ＳＩ６は絶縁性樹脂７を介して導電塗料８によってシー
ルドされるため、不要な輻射ノイズの発生が低減される
。In this way, the printed circuit board 1 and (/L
Since the SI 6 is shielded by the conductive paint 8 via the insulating resin 7, generation of unnecessary radiation noise is reduced.
上記実施例では絶縁性樹脂７を導電塗料８で被覆してい
るが、金属メッキで被覆してもよい。In the above embodiment, the insulating resin 7 is coated with the conductive paint 8, but it may be coated with metal plating.
〈発明の効果〉
以上より明らかなように、この発明の液晶ドツトマトリ
クスユニットは、駆動回路を装着したプリント基板を絶
縁性樹脂で被覆し、さらに上記絶縁性樹脂を導電材料で
被覆して、この導電材料を接地するようにしでいるので
、簡単、堅牢な構造でもっで、不要輻射／イＸを低減で
きる。<Effects of the Invention> As is clear from the above, the liquid crystal dot matrix unit of the present invention is provided by coating a printed circuit board on which a drive circuit is mounted with an insulating resin, and further coating the insulating resin with a conductive material. Since the conductive material is grounded, unnecessary radiation/IX can be further reduced with a simple and robust structure.
第１図はこの発明の一実施例の断面図、第２図は従来例
の断面図である。
１・・・プリント基板、 ３・・・液晶表示装置、６・
・・ＬＳ１． ７・・・絶縁性樹脂、 訃・・導電塗料
。FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional example. 1... Printed circuit board, 3... Liquid crystal display device, 6...
...LS1. 7...Insulating resin, ...Conductive paint.
Claims (1)
を絶縁性樹脂で被覆し、さらに上記絶縁性樹脂を導電材
料で被覆して、この導電材料を接地するようにしたこと
を特徴とする液晶ドットマトリクスユニット。(1) A liquid crystal display characterized in that a printed circuit board on which a driving circuit of a liquid crystal display device is mounted is coated with an insulating resin, the insulating resin is further coated with a conductive material, and the conductive material is grounded. dot matrix unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24188084A JPS61120191A (en) | 1984-11-15 | 1984-11-15 | Liquid crystal dot matrix unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24188084A JPS61120191A (en) | 1984-11-15 | 1984-11-15 | Liquid crystal dot matrix unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61120191A true JPS61120191A (en) | 1986-06-07 |
Family
ID=17080910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24188084A Pending JPS61120191A (en) | 1984-11-15 | 1984-11-15 | Liquid crystal dot matrix unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61120191A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11622421B2 (en) | 2016-10-21 | 2023-04-04 | Watlow Electric Manufacturing Company | Electric heaters with low drift resistance feedback |
-
1984
- 1984-11-15 JP JP24188084A patent/JPS61120191A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11622421B2 (en) | 2016-10-21 | 2023-04-04 | Watlow Electric Manufacturing Company | Electric heaters with low drift resistance feedback |
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