JPS6213878B2 - - Google Patents
Info
- Publication number
- JPS6213878B2 JPS6213878B2 JP54107716A JP10771679A JPS6213878B2 JP S6213878 B2 JPS6213878 B2 JP S6213878B2 JP 54107716 A JP54107716 A JP 54107716A JP 10771679 A JP10771679 A JP 10771679A JP S6213878 B2 JPS6213878 B2 JP S6213878B2
- Authority
- JP
- Japan
- Prior art keywords
- filter
- signal
- synchronization signal
- stereoscopic television
- color
- 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
Links
- 230000003287 optical effect Effects 0.000 claims description 11
- 230000010287 polarization Effects 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
Description
【発明の詳細な説明】
本発明は従来のテレビ放送と同じ伝送帯域を用
いた高解像度の立体テレビジヨン装置を提供する
ことを目的とするものである。DETAILED DESCRIPTION OF THE INVENTION An object of the present invention is to provide a high-resolution stereoscopic television apparatus that uses the same transmission band as conventional television broadcasting.
従来、偏向フイルタを用いた立体テレビジヨン
装置としては大別して次の各方式がある。 Conventionally, three-dimensional television apparatuses using polarization filters can be broadly classified into the following types.
(イ) ２個の陰極線管の前に夫々扁光軸の異なるフ
イルタを置き、これを光学的に合成する方式。(a) A method in which filters with different optical axes are placed in front of two cathode ray tubes, and these are optically combined.
(ロ) １個の陰極線管の前に機械的又は電気的に扁
光軸の切替るフイルタを置く方式。(b) A method in which a filter is placed in front of one cathode ray tube to mechanically or electrically switch the optical axis.
(ハ) 螢光面の前面に交互に扁光軸の異なるストラ
イブ状の扁光フイルタを設け、フイルタに応じ
てビデオ信号を左右切り替える方式。(c) A method in which stripe-shaped polarization filters with different polarization axes are provided alternately in front of the fluorescent surface, and the video signal is switched between left and right depending on the filter.
(ニ) カラー投射型テレビジヨン装置に於て特定の
色の投射型陰極線管の前に特定の方向の扁光フ
イルタを置き、その色の信号を右又は左とする
方式。(d) In a color projection television system, a polarizing filter oriented in a specific direction is placed in front of a projection cathode ray tube of a specific color, and the signal of that color is set to the right or left.
上記の方式は何れも観察には左右扁光軸の異る
扁光眼鏡を用いるものである。上記夫々の方式に
は次のような欠点がある。 All of the above methods use polarized glasses with different left and right optical axes for observation. Each of the above methods has the following drawbacks.
(イ)は伝送系に２倍の帯域幅を要し、かつ観察す
る視野がせまい欠点がある。 (a) requires twice as much bandwidth for the transmission system and has the disadvantage of having a narrow field of view.
(ロ)は前述の如く大面積の扁光軸切替可能な扁光
フイルタを得る事が困難であり、且つこのフイル
タの立上り、立下り時間が大であるため上下また
は左右での立体感がうすれる欠点がある。 (B) As mentioned above, it is difficult to obtain a polarizing filter with a large area and the optical axis can be switched, and the rising and falling times of this filter are long, so the three-dimensional effect in the vertical or horizontal directions is weak. There are some drawbacks.
(ハ)は走査中の扁光フイルタを検出する手段を要
し、且つ解像度に限界があると云う欠点がある。 The method (c) requires means for detecting the polarization filter during scanning, and has the disadvantage that there is a limit to the resolution.
(ニ)は真の立体感が得られない欠点がある。 (d) has the disadvantage that a true three-dimensional effect cannot be obtained.
本発明は上述の(ロ)の方式を改良したものであ
り、特に大面積切替式扁光フイルタを必要としな
い投射型テレビジヨン装置を用い各色毎に数フレ
ーム毎に位相をずらして切り替える事によりフイ
ルタの立上り立下りの遅れをによる影響を軽減し
ようとするものであり、以下本発明の一実例につ
いて図面を参照して説明する。 The present invention is an improvement on the above-mentioned method (b), and uses a projection television device that does not require a large-area switching type polarizing filter, and changes the phase of each color every few frames. The present invention is intended to reduce the influence of delays in rising and falling edges of the filter, and an example of the present invention will be described below with reference to the drawings.
第１図において、１，２，３，は夫々赤、緑、
青の光学系内蔵の投射型陰極線管であり、４，
５，６は夫々電気的にその扁光角度を切替えうる
扁光フイルタである。この様なフイルタは例えば
光の透過方向より透明基板の間に扁光フイルタ−
透明電極−ツイスト型液晶−透明電極を設ける構
成によつて得られ、透明電極間に電圧を印加しな
い時の出力光の扁光軸は扁光フイルタの方向と一
致するが、電圧を印加すると扁光軸は回転する。
７は投射スクリーンであり、反射型、投射型の何
れでも可である。この様な構成であるから、スク
リーンには扁光フイルタ４，５，６に印加された
電圧により扶々扁光軸と色の異なる映像が生じ
る。 In Figure 1, 1, 2, 3 are red, green, respectively.
It is a projection cathode ray tube with a built-in blue optical system.
5 and 6 are polarization filters whose polarization angles can be electrically switched. Such a filter is, for example, a polarizing filter placed between transparent substrates in the direction of light transmission.
This is obtained by a configuration in which a transparent electrode, a twisted liquid crystal, and a transparent electrode are provided. The optical axis rotates.
7 is a projection screen, which may be either a reflection type or a projection type. With such a configuration, the voltages applied to the polarization filters 4, 5, and 6 produce images on the screen whose colors differ from the polarization axis.
第２図は映像信号及びフイルタ切替信号のタイ
ミングである。第２図のａは垂直同期信号であ
り、ｂ，ｃ，ｄは赤、緑、青のビデオ信号を表わ
している。図中同期信号は省略している。上記
ａ，ｂ，ｃにおいて、Ｒは右側信号、Ｌは左側信
号を示している。 FIG. 2 shows the timing of the video signal and filter switching signal. In FIG. 2, a is a vertical synchronizing signal, and b, c, and d represent red, green, and blue video signals. The synchronization signal is omitted in the figure. In a, b, and c above, R indicates the right side signal and L indicates the left side signal.
第２図のｅ，ｆ，ｇは夫々赤、緑、青の扁光フ
イルタ４，５，６にかかる電圧を表わす。電圧が
印加された時右側信号が投射されるので、観察用
眼鏡の右の扁光フイルタの扁光軸と電圧印加した
時のフイルタ４，５，６の扁光軸が一致する様に
し、又電圧印加しない時のフイルタ４，５，６の
扁光軸と眼鏡の左側フイルタとが扁光軸が一致す
る様に構成する。フイルタを前記扁光フイルタと
した場合、立上り時間は印加電圧をあげる事によ
り数msecに短縮しうるが立下りの方の時間は液
晶の粘度によつて決る。この切換特性は例えば、
第２図ｅの電圧がかかるフイルタについては第２
図ｉに示すようになる。立ち下りの時間は比較的
大であるが、図でT1の期間はほぼ完全なスイツ
チングが得られ、T2の期間は１色のみ不完全と
なるが、十分満足しうる立体感が得られる。第２
図のｈはフイルタ切り替え及びビデオ信号切替用
同期信号である。この信号を現在のテレビ放送帯
域内で伝送するための手段としては、例えば前フ
レームの垂直帰線期間中のバースト信号の１つを
位相をずらせ、これを検出する手段等が考えられ
る。第３図のａは上記の如くして検出した左右切
換マーカーパルスであり、これをモノマルチバイ
ブレータで第３図ｂに示すように遅延させ、第３
図ｃに示す垂直同期信号とのANDをとると第３
図ｄに示す左右切換同期信号が得られる。第３図
ｃの垂直同期信号と第３図ｄの左右切換信号を第
４図の６進カウンタ８に加え、その出力をデコー
ダ９に加え、デコーダ出力０〜４を図の如く
NORゲート１０，１１，１２に加えると出力端
子１３，１４，１５には第２図ｅ，ｆ，ｇの信号
が得られる。 In FIG. 2, e, f, and g represent the voltages applied to the red, green, and blue polarization filters 4, 5, and 6, respectively. Since the right side signal is projected when a voltage is applied, make sure that the optical axis of the right polarizing filter of the viewing glasses matches the optical axis of the filters 4, 5, and 6 when the voltage is applied, and The optical axis of the filters 4, 5, and 6 when no voltage is applied is made to coincide with the optical axis of the left filter of the glasses. When the filter is the polarizing filter described above, the rise time can be shortened to several milliseconds by increasing the applied voltage, but the fall time is determined by the viscosity of the liquid crystal. This switching characteristic is, for example,
Regarding the filter to which the voltage of Fig. 2e is applied, the second
The result is as shown in Figure i. Although the falling time is relatively long, almost perfect switching is obtained during period T 1 in the figure, and although only one color is incomplete during period T 2 , a sufficiently satisfying three-dimensional effect can be obtained. . Second
h in the figure is a synchronization signal for filter switching and video signal switching. Possible means for transmitting this signal within the current television broadcast band include, for example, means for shifting the phase of one of the burst signals during the vertical retrace period of the previous frame and detecting this. In Fig. 3, a shows the left/right switching marker pulse detected as described above, and this is delayed as shown in Fig. 3b using a mono-multi vibrator.
When ANDed with the vertical synchronization signal shown in Figure c, the third
The left/right switching synchronization signal shown in Figure d is obtained. The vertical synchronization signal shown in Fig. 3c and the left/right switching signal shown in Fig. 3d are added to the hexadecimal counter 8 shown in Fig. 4, the output thereof is added to the decoder 9, and the decoder outputs 0 to 4 are output as shown in the figure.
When applied to the NOR gates 10, 11 and 12, the signals e, f and g in FIG. 2 are obtained at the output terminals 13, 14 and 15.
この様にして、本発明によれば現行のテレビ帯
域内で立体テレビジヨン信号を伝送し得、且つ視
野が広く高解像度の立体テレビ装置を得る事が出
来る。 In this way, according to the present invention, it is possible to transmit a stereoscopic television signal within the current television band, and to obtain a stereoscopic television device with a wide field of view and high resolution.
第１図は本発明の一実施例における立体テレビ
ジヨン装置の原理図、第２図、第３図は同装置説
明のための波形図、第４図は同装置の一部分のブ
ロツク線図である。
１，２，３……投写型カラー陰極線、４，５，
６……扁光フイルタ、７……スクリーン。
FIG. 1 is a principle diagram of a stereoscopic television apparatus according to an embodiment of the present invention, FIGS. 2 and 3 are waveform diagrams for explaining the apparatus, and FIG. 4 is a block diagram of a part of the apparatus. . 1, 2, 3... Projection type color cathode ray, 4, 5,
6...Blank filter, 7...Screen.
Claims (1)
間に、垂直同期信号のｎ倍（ｎ＝２，３，４，
５，……）の周期に同期してその扁光軸の方向が
切替る扁光フイルタを設け、各色毎に扁光軸の切
替位相をずらすと共に、各色投射型陰極線管に同
様に位相のずれた左右のビデオ信号を供給し、投
射された画像を左右扁光軸の異る眼鏡で観察する
ことを特徴とする立体テレビジヨン装置。 ２ 各色毎の扁光フイルタの位相を定めるための
同期信号を設け、この同期信号を伝送信号中に情
報として含ませることを特徴とする特許請求の範
囲第１項記載の立体テレビジヨン装置。[Claims] 1. Between the projection type color cathode ray tube and the projection screen, n times the vertical synchronizing signal (n=2, 3, 4,
A polarization filter whose polarization axis direction is switched in synchronization with the cycle of A stereoscopic television device is characterized in that it supplies left and right video signals, and the projected images are observed through glasses with different left and right optical axes. 2. The stereoscopic television apparatus according to claim 1, characterized in that a synchronization signal is provided for determining the phase of the polarizing filter for each color, and the synchronization signal is included as information in the transmission signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10771679A JPS5631293A (en) | 1979-08-23 | 1979-08-23 | Stereoscopic television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10771679A JPS5631293A (en) | 1979-08-23 | 1979-08-23 | Stereoscopic television |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5631293A JPS5631293A (en) | 1981-03-30 |
| JPS6213878B2 true JPS6213878B2 (en) | 1987-03-30 |
Family
ID=14466128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10771679A Granted JPS5631293A (en) | 1979-08-23 | 1979-08-23 | Stereoscopic television |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5631293A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991007853A1 (en) * | 1989-11-09 | 1991-05-30 | Sokolnichesky Tzentr Nttm G. Moskvy | Stereoscopic television device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4905076A (en) * | 1983-03-04 | 1990-02-27 | N.A. Philips & U.S. Philips Corporation | Three dimensional television system and projection television receiver |
| JPH0610032U (en) * | 1992-07-16 | 1994-02-08 | 三菱アルミニウム株式会社 | Slide structure for vehicle chairs |
-
1979
- 1979-08-23 JP JP10771679A patent/JPS5631293A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991007853A1 (en) * | 1989-11-09 | 1991-05-30 | Sokolnichesky Tzentr Nttm G. Moskvy | Stereoscopic television device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5631293A (en) | 1981-03-30 |
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