JPH0752955B2 - Projection TV receiver - Google Patents
Projection TV receiverInfo
- Publication number
- JPH0752955B2 JPH0752955B2 JP61023209A JP2320986A JPH0752955B2 JP H0752955 B2 JPH0752955 B2 JP H0752955B2 JP 61023209 A JP61023209 A JP 61023209A JP 2320986 A JP2320986 A JP 2320986A JP H0752955 B2 JPH0752955 B2 JP H0752955B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- fan
- deflection yoke
- mounting portion
- crt
- 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.)
- Expired - Lifetime
Links
- 238000009423 ventilation Methods 0.000 claims 4
- 238000009125 cardiac resynchronization therapy Methods 0.000 claims 2
- 238000005192 partition Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 210000003739 neck Anatomy 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
- F25D2317/068—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans
- F25D2317/0684—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans the fans allowing rotation in reverse direction
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は投写型テレビジョン受像機に関する。Description: FIELD OF THE INVENTION The present invention relates to a projection television receiver.
従来の技術 従来より、投写型テレビジョン受像機においては発熱量
の大なる部分にファンを取付けて冷却していた。2. Description of the Related Art Conventionally, in a projection television receiver, a fan is attached to a portion where a large amount of heat is generated for cooling.
発明が解決しようとする問題点 しかるに、ファンで発熱部を冷却しても、３本のCRTの
偏向ヨークDY,センタリングマグネット,CRTのネック部
等が温度差をもち、その為、コンバーゼンスが変化し、
ミスコンバーゼンスになるという問題点を有していた。However, even if the heat generating part is cooled by the fan, the deflection yoke DY of the three CRTs, the centering magnet, the neck part of the CRT, etc. have a temperature difference, which causes the convergence to change. ,
It had the problem of becoming misconvergence.
本発明は、受像機内を効果的に冷却することができてミ
スコンバーゼンスの発生を抑えることのできる投写型テ
レビジョン受像機を提供しようとするものである。An object of the present invention is to provide a projection television receiver capable of effectively cooling the inside of the receiver and suppressing the occurrence of misconvergence.
問題点を解決するための手段 本発明は、３本のCRTの温度差を無くす為、各CRTのセン
タリングマグネット取付部と偏向ヨーク取付部とを熱的
に分離する仕切板を設け、それぞれにファンを設け、か
つこれらファンの回転方向を切替える事により熱のバラ
ンスを良くするようにしたものである。Means for Solving the Problems According to the present invention, in order to eliminate the temperature difference between the three CRTs, a partition plate that thermally separates the centering magnet mounting portion and the deflection yoke mounting portion of each CRT is provided, and each of them has a fan. Is provided and the direction of rotation of these fans is switched to improve the heat balance.
作用 本発明によれば、左右のCRT（又はその近傍）に温度セ
ンサーを設け、その温度差検出によりファンの回転方向
に切換え、常に温度差が最小になるようにすることによ
り、受像機内を効果的に冷却することができる。Effects According to the present invention, temperature sensors are provided on the left and right CRTs (or in the vicinity thereof), and the direction of rotation of the fan is switched by detecting the temperature difference, so that the temperature difference is always minimized. Can be cooled.
実 施 例 第１図a,bに本発明の一実施例の投写型テレビジョン受
像機の水平断面図及び後面図を示す。図中、4B,4G,4Rは
それぞれB,G,RのCRT（陰極線管）であり、温度センサー
S1をCRT4Bの偏向ヨークD1の近く（密着させるようにし
てもよい）に、温度センサS2をCRT4Rの偏向ヨークD3の
近くに設置し、温度センサS1とS2の温度が の時、ファン1Bは第１図ｂに示す矢印の方向に風を吹き
込むように回転する。温度センサS1の温度が低下する
と、第２図の本実施例の結線図に示すようにリレー14が
働いてスイッチ15,16が切替わり、ファン1B,1G,1Rのモ
ーターにかかる電圧が逆になり、風の流れる方向が第１
図ｂの矢印と逆方向になり温度センサS2の方の温度が温
度センサS1の温度より低くなるように空気が流れる。こ
のようにすれば温度センサS1とS2の検出する温度差が最
小になるよう風向きが自動的に切替わる。Example 1 FIGS. 1A and 1B are a horizontal sectional view and a rear view of a projection type television receiver according to an embodiment of the present invention. In the figure, 4B, 4G and 4R are CRTs (cathode ray tubes) of B, G and R respectively, and temperature sensors
The S 1 to CRT4B near the deflection yoke D 1 of the (may be brought into close contact), established the temperature sensor S 2 in the vicinity of the deflection yoke D 3 of CRT4R, the temperature of the temperature sensor S 1 and S 2 are At this time, the fan 1B rotates so as to blow air in the direction of the arrow shown in FIG. 1b. When the temperature of the temperature sensor S 1 drops, the relay 14 operates to switch the switches 15 and 16 as shown in the wiring diagram of the present embodiment in FIG. 2, and the voltage applied to the motors of the fans 1B, 1G and 1R is reversed. And the direction of the wind is the first
Air flows in the opposite direction to the arrow in FIG. B so that the temperature of the temperature sensor S 2 becomes lower than the temperature of the temperature sensor S 1 . By doing so, the wind direction is automatically switched so that the temperature difference detected by the temperature sensors S 1 and S 2 is minimized.
以下第１図，第２図と共に更に詳しく述べる。第１図ａ
は投写型テレビジョン受像機を上から見た状態を示すも
ので、偏向ヨークD1,D2,D3とコンバーゼンスヨークCY1,
CY2,CY3,及びフォーカスコイルF1,F2,F3,並びにセンタ
リングマグネットC1,C2,C3はCRT4B,4G,4Rのネック上の
部分を切断して記してある。This will be described in more detail below with reference to FIGS. 1 and 2. Figure 1a
Shows a state in which the projection television receiver is viewed from above. The deflection yokes D 1 , D 2 , D 3 and the convergence yoke C Y 1,
C Y 2, C Y 3, the focus coils F 1 , F 2 , F 3 , and the centering magnets C 1 , C 2 , C 3 are shown by cutting the portions on the necks of the CRTs 4B, 4G, 4R.
1B,1G,1Rはファンで、ファン1Gの風向きが第１図ａの矢
印の方向の時、ファン1Bの風向きは紙面の表から裏への
方向となり、ファン1Rの風向きはファン1Bと逆になる。
2B,2G,2Rはファンで、筐体が仕切板３で熱的に区切られ
ている時、センターリングマグネットC1C2,C3が位置す
る後部（第１図ａのＢの部分）の熱分布は一般に、前部
（第１図ａのＡの部分）の熱分布とは異なるので、Ｂの
部分を温度均一下の為に設けられてあり、ひとつのファ
ン2Gの風向きが、第１図ａの矢印の方向の時、ファン2B
の風向きは紙面の表から裏への方向となり、ファン2Rの
風向きはファン2Bと逆になる。即ち第１図ｂの如くな
る。ファン1B,2B,1G,2G,1R,2Rは６個とも同一のDCモー
タでよく、取付方向さえ選べば第１図ｂに示す方向に風
が流れる。4Bは青のCRT、4Gは緑のCRT、4Rは赤のCRT、5
B,5G,5Rはレンズで、それぞれCRT4B,4G,4Rの像を拡大投
影する。６は筺体の外箱、７は筐体６の底面、8B,8G,8R
はCRT4B,4G,4Rのソケットであり、図中のファン1B,1G,1
R,2B,2G,2Rを除けば二体式投写型テレビとして知られて
いる。S1,S2,S3,S4は上記のように温度センサーであ
り、温度センサーS1〜S4と、ファン1B,1G,1R,2B,2G,2R
及びリレー14,24、アンプ11,21等は第２図の如く接続す
る。第２図で、11は差動アンプであり、入力１と２の差
を検出し、入力１の方が高い時、即ち温度センサS1の温
度に比例する電圧が高い時、差動アンプ11の出力３が高
レベルとなって、トランジスタ13が導通し、リレー14の
コイルにトランジスタ13のコレクタ電流が流れ、スイッ
チ15,16は、ａ−ｃ間短絡となり、ファン1B,1G,1Rに
は、電源17の電圧が第２図の如く与えられ、ファン1B,1
G,1Rは第２図の矢印の方向（右まわり）に回転する。こ
の時、第１図a,bの矢印の方向に空気が流れる。又、差
動アンプ21も差動アンプ11と同じ構成で、温度センサS3
の検知温度に比例した電圧が差動アンプ21の第１端子に
加えられ、温度センサS4の検知温度に比例した電圧が差
動アンプ21の第２端子に加えられ、差動アンプ21の第１
端子の電圧が第２端子の電圧より高ければ、差動アンプ
21の第３端子の出力が高レベルとなり、トランジスタ23
が導通し、そのコレクタ電流がリレー24のコイルを流
れ、スイッチ25,26はａ−ｃ間短絡となり、ファン2B,2
G,2Rには第２図の如く電源17の電圧が加わり、第２図の
如くファンは回転し第１図に示す方向に空気が流れる。
さて、温度上昇に差があり、それがファンの回転で変化
し、例えば、温度センサS2の検出温度に比例する電圧
が、温度センサS1の検出温度に比例する電圧より高くな
る（即ち、第１図ａで温度センサS1の在る部分と、温度
センサS2の在る部分との温度差が逆になる）と、差動ア
ンプ11の第３端子からの出力は低レベルになり、トラン
ジスタ13は遮断され、リレー14のコイルに電流が流れな
くなり、スイッチ15,16はｂ−ｃ間短絡となり、ファン1
B,1G,1Rに加わる直流電圧が逆転し、ファンも第２図と
逆にまわり、第１図a,bに示す矢印と逆の方向に空気が
流れる。従って、時間が経つとと温度センサS1とS2の検
出温度差が再逆転する。これを繰り返せば温度差は余り
大きくならない。ファン2B,2G,2Rについても同様の事が
云える。第２図の差動アンプ12,22は、トランジスタ13,
23のベース出力抵抗で、差動アンプ11,21の出力の駆動
電力が少い場合の保護抵抗と差動アンプ11及び12の第1,
第２端子への入力間の微少な電圧差では第３端子からの
出力の状態が反転しないように挿入した抵抗で、トラン
ジスタ13,23のベース電流の制限と、電圧効果とを兼ね
ている。以上の如く構成すれば、第１図a,bに示す、A,B
の二つの部分の温度差を互に独立に自動制御により、一
定値以下にする事ができる。1B, 1G, 1R are fans. When the wind direction of the fan 1G is the direction of the arrow in Fig. 1a, the wind direction of the fan 1B is from the front to the back of the paper, and the wind direction of the fan 1R is opposite to that of the fan 1B. Become.
2B, 2G, 2R are fans, and when the case is thermally partitioned by the partition plate 3, the center ring magnets C 1 C 2 , C 3 are located in the rear part (the part B in FIG. 1a). Since the heat distribution is generally different from the heat distribution of the front part (portion A in FIG. 1A), the portion B is provided for uniform temperature, and the direction of air flow of one fan 2G is Fan 2B in the direction of arrow in Figure a
The wind direction is from front to back on the page, and the wind direction of Fan 2R is opposite to that of Fan 2B. That is, it becomes as shown in FIG. The six fans 1B, 2B, 1G, 2G, 1R, 2R may be the same DC motor, and if the mounting direction is selected, the wind will flow in the direction shown in FIG. 1b. 4B is blue CRT, 4G is green CRT, 4R is red CRT, 5
B, 5G, and 5R are lenses that magnify and project the images of CRTs 4B, 4G, and 4R, respectively. 6 is an outer box of the housing, 7 is the bottom of the housing 6, 8B, 8G, 8R
Is the socket of CRT4B, 4G, 4R, fan 1B, 1G, 1 in the figure
Except for R, 2B, 2G and 2R, it is known as a two-body projection TV. S 1, S 2, S 3 , S 4 is a temperature sensor as described above, the temperature sensor S 1 to S 4, the fan 1B, 1G, 1R, 2B, 2G, 2R
The relays 14 and 24 and the amplifiers 11 and 21 are connected as shown in FIG. In FIG. 2, reference numeral 11 denotes a differential amplifier, which detects the difference between inputs 1 and 2, and when the input 1 is higher, that is, the voltage proportional to the temperature of the temperature sensor S 1 is higher, the differential amplifier 11 Output 3 becomes high level, the transistor 13 becomes conductive, the collector current of the transistor 13 flows in the coil of the relay 14, the switches 15 and 16 are short-circuited between a and c, and the fans 1B, 1G and 1R have , The voltage of the power supply 17 is given as shown in Fig. 2, and the fans 1B, 1
G and 1R rotate in the direction of the arrow in Fig. 2 (clockwise). At this time, air flows in the direction of the arrow in FIGS. Also, the differential amplifier 21 has the same configuration as the differential amplifier 11, and the temperature sensor S 3
Of the differential amplifier 21 is applied to the first terminal of the differential amplifier 21, and a voltage proportional to the detected temperature of the temperature sensor S 4 is applied to the second terminal of the differential amplifier 21. 1
If the voltage of the terminal is higher than the voltage of the second terminal, the differential amplifier
The output of the third terminal of 21 becomes high level and the transistor 23
Is conducted, its collector current flows through the coil of the relay 24, the switches 25 and 26 are short-circuited between a and c, and the fans 2B and 2
The voltage of the power supply 17 is applied to G and 2R as shown in FIG. 2, the fan rotates as shown in FIG. 2, and the air flows in the direction shown in FIG.
Now, there is a difference in temperature rise, which changes with the rotation of the fan, and for example, the voltage proportional to the temperature detected by the temperature sensor S 2 becomes higher than the voltage proportional to the temperature detected by the temperature sensor S 1 (that is, In FIG. 1a, the temperature difference between the part where the temperature sensor S 1 is present and the part where the temperature sensor S 2 is present is opposite), and the output from the third terminal of the differential amplifier 11 becomes low level. , The transistor 13 is cut off, no current flows through the coil of the relay 14, the switches 15 and 16 are short-circuited between b and c, and the fan 1
The DC voltage applied to B, 1G, 1R reverses, the fan also rotates in the opposite direction to that in FIG. 2, and air flows in the direction opposite to the arrow shown in a and b in FIG. Therefore, over time, the temperature difference between the temperature sensors S 1 and S 2 is reversed again. If this is repeated, the temperature difference will not increase so much. The same applies to fans 2B, 2G and 2R. The differential amplifiers 12 and 22 shown in FIG.
With the base output resistance of 23, the protection resistance when the drive power of the output of the differential amplifiers 11 and 21 is small and the first and second of the differential amplifiers 11 and 12
A resistor inserted so that the state of the output from the third terminal will not be inverted by a slight voltage difference between the inputs to the second terminal, and serves both to limit the base currents of the transistors 13 and 23 and to have a voltage effect. With the above configuration, A, B shown in FIG. 1 a, b
It is possible to keep the temperature difference between the two parts below a certain value by automatic control independently of each other.
発明の効果 本発明によれば、以下のごとき効果が得られる。Effects of the Invention According to the present invention, the following effects can be obtained.
（１） ３本のCRTの周囲温度を同じか、温度差を極め
て小さくできるので、偏向ヨークDYの膨張，収縮の差に
よるミスコンバーゼンスが無視できる。もし温度差によ
り３本のCRTのビームの上下，左右の差異が、CRT管面上
で0.1m/m発生したとすると、10インチCRT（又は画面サ
イズ）を100インチのスクリーンに投影した時、1m/mの
差になる。実際に10インチCRT（又は画面サイズ）で、
偏向ヨークDYの温度変化によるビームの中心（全体に同
じように動く）ずれが0.2〜0.3m/m以上動く事が測定さ
れており、100インチに拡大すると2.0〜3.0m/mの動きと
なり、第１図の３本のCRTの両端で温度差が大きくなる
と、ミスコンバーゼンスが目立つが、このミスコンバー
ゼンスが発生しなくなる。(1) Since the ambient temperatures of the three CRTs are the same or the temperature difference can be made extremely small, misconvergence due to the difference in expansion and contraction of the deflection yoke D Y can be ignored. If the difference between the upper, lower, left and right of the three CRT beams due to the temperature difference is 0.1 m / m on the CRT tube surface, when projecting a 10-inch CRT (or screen size) on a 100-inch screen, The difference is 1 m / m. With a 10-inch CRT (or screen size),
It has been measured that the center of the beam (which moves the same as the whole) due to temperature change of the deflection yoke D Y moves by 0.2 to 0.3 m / m or more, and when it is expanded to 100 inches, it moves 2.0 to 3.0 m / m. When the temperature difference between both ends of the three CRTs in FIG. 1 becomes large, the misconvergence is conspicuous, but the misconvergence does not occur.
（２） セット内の温度が平均化され、発熱物の配置の
自由度を増す。(2) The temperatures in the set are averaged, and the degree of freedom in arranging the heating elements is increased.
（３） 仕切板を介して、偏向ヨーク取付部とセンタリ
ングマグネット取付部に分けるので、偏向ヨークとコン
バゼンスヨークの熱変化と、センタリングマグネットの
熱変化を別々に補償できる。(3) Since the deflection yoke mounting portion and the centering magnet mounting portion are divided via the partition plate, it is possible to separately compensate for the heat change of the deflection yoke and the convergence yoke and the heat change of the centering magnet.
第１図ａは本発明の一実施例における投写型テレビジョ
ン受像機の平面断面図、第１図ｂは同後面図、第２図は
同受像機の要部の結線図である。 １（1B,1G,1R）……ファン、２（2B,2G,2R）……ファ
ン、３……仕切板、４（4B,4G,4R）……CRT、５……レ
ンズ、６……筐体の外箱、７……底板、８（8B,8G,8R）
……CRTソケット、D1,D2,D3……偏向ヨーク、CY1,CY2,C
Y3……コンバーゼンスヨーク、F1,F2,F3……フォーカス
コイル、C1,C2,C3……センタリングマグネット、11,21
……差動アンプ、12,22……抵抗、13,23……トランジス
タ、15,16,25,26……スイッチ、14,24……リレーのコイ
ル、17……電源。FIG. 1a is a plan sectional view of a projection television receiver according to an embodiment of the present invention, FIG. 1b is a rear view of the same, and FIG. 2 is a connection diagram of essential parts of the receiver. 1 (1B, 1G, 1R) …… fan, 2 (2B, 2G, 2R) …… fan, 3 …… partition plate, 4 (4B, 4G, 4R) …… CRT, 5 …… lens, 6 …… Case outer box, 7 ... bottom plate, 8 (8B, 8G, 8R)
…… CRT socket, D 1 , D 2 , D 3 …… Deflection yoke, C Y 1, C Y 2, C
Y 3 …… Convergence yoke, F 1 , F 2 , F 3 …… Focus coil, C 1 , C 2 , C 3 …… Centering magnet, 11,21
...... Differential amplifier, 12,22 ...... Resistance, 13,23 ...... Transistor, 15,16,25,26 …… Switch, 14,24 …… Relay coil, 17 …… Power supply.
Claims (1)
上の像をスクリーン上に投写する投写型テレビジョン受
像機において、各CRTのセンタリングマグネット取付部
と偏向ヨーク取付部とを熱的に分離する仕切板と、前記
センタリングマグネット取付部側に第１の換気ファンお
よび第１の複数の温度センサを備え、また前記偏向ヨー
ク取付部側に第２の換気ファンおよび第２の複数の温度
センサを備え、前記センタリングマグネット側内の温度
を前記第１の複数の温度センサにより検知し、この温度
差の変化により前記第１の換気ファンの回転方向を変化
させ、また前記偏向ヨーク取付部側内の温度を前記第２
の複数の温度センサにより検知し、この温度差の変化に
より前記第２の換気ファンの回転方向を変化させること
を特徴とする投写型テレビジョン受像機。1. In a projection television receiver for projecting images on the screens of three CRTs housed in the same housing onto a screen, a centering magnet mounting portion and a deflection yoke mounting portion of each CRT are heated. And a first ventilation fan and a first plurality of temperature sensors on the centering magnet mounting portion side, and a second ventilation fan and a second plurality of temperature sensors on the deflection yoke mounting portion side. A temperature sensor is provided, the temperature inside the centering magnet is detected by the first plurality of temperature sensors, the rotation direction of the first ventilation fan is changed by the change in the temperature difference, and the deflection yoke attachment portion is provided. The temperature in the side is the second
Of the plurality of temperature sensors, and the rotation direction of the second ventilation fan is changed by the change in the temperature difference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61023209A JPH0752955B2 (en) | 1986-02-05 | 1986-02-05 | Projection TV receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61023209A JPH0752955B2 (en) | 1986-02-05 | 1986-02-05 | Projection TV receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62181585A JPS62181585A (en) | 1987-08-08 |
| JPH0752955B2 true JPH0752955B2 (en) | 1995-06-05 |
Family
ID=12104274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61023209A Expired - Lifetime JPH0752955B2 (en) | 1986-02-05 | 1986-02-05 | Projection TV receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0752955B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002521796A (en) * | 1998-07-21 | 2002-07-16 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Cathode ray tube having a deflection unit provided with a blower |
| KR100924733B1 (en) | 2005-02-16 | 2009-11-04 | 아세릭 에이. 에스 | A cooling device and a control method thereof |
| JP6082780B2 (en) * | 2015-07-03 | 2017-02-15 | 上銀科技股▲分▼有限公司 | Heat dissipation method applied to multi-axis controllers |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5935342Y2 (en) * | 1980-08-06 | 1984-09-29 | 三菱重工業株式会社 | Vertical circumferential automatic welding equipment |
-
1986
- 1986-02-05 JP JP61023209A patent/JPH0752955B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62181585A (en) | 1987-08-08 |
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