JP3295437B2 - Display device - Google Patents
Display deviceInfo
- Publication number
- JP3295437B2 JP3295437B2 JP08913791A JP8913791A JP3295437B2 JP 3295437 B2 JP3295437 B2 JP 3295437B2 JP 08913791 A JP08913791 A JP 08913791A JP 8913791 A JP8913791 A JP 8913791A JP 3295437 B2 JP3295437 B2 JP 3295437B2
- Authority
- JP
- Japan
- Prior art keywords
- display device
- signal
- field
- pixel
- light emission
- 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
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- Liquid Crystal Display Device Control (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Television Systems (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】この発明は、テレビジョン信号な
ど画像信号の動画像表示に適し、各画素に対応する表示
セルにアナログメモリを有する表示装置に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device suitable for displaying a moving image of an image signal such as a television signal and having an analog memory in a display cell corresponding to each pixel.
【０００２】[0002]
【従来の技術】従来この種の表示装置としては、メモリ
機能を有する液晶などのセルを持ち、各セル毎にスイッ
チを有するものがあり、図５に示す略構成図のように入
力映像信号をそのまま液晶表示装置に印加していた。図
５図示構成では入力映像信号はプロセッサ11で信号処理
され、行方向の画素信号は直並列変換列駆動回路12を介
してメモリ型液晶セル16をマトリクス状に有する表示装
置に印加され、行駆動は行駆動回路13を介して実施され
る。各液晶セル16はアナログメモリ機能を有して、入力
映像信号のその時の振幅量に応じて各セルがほぼ１フィ
ールドまたは１フレーム期間表示発光を継続する。ここ
で１フィールドまたは１フレーム期間としたのは飛越し
走査の場合は１フィールド期間、順次走査の場合は１フ
レーム期間を採用するという意味である。2. Description of the Related Art Conventionally, as a display device of this type, there is a display device having a cell such as a liquid crystal having a memory function and a switch for each cell. As shown in a schematic configuration diagram of FIG. The voltage was directly applied to the liquid crystal display. In the configuration shown in FIG. 5, an input video signal is signal-processed by a processor 11, and a pixel signal in a row direction is applied to a display device having memory type liquid crystal cells 16 in a matrix via a serial-parallel conversion column drive circuit 12, and the row drive is performed. Is implemented via the row drive circuit 13. Each liquid crystal cell 16 has an analog memory function, and each cell continues to emit light for approximately one field or one frame period according to the amplitude of the input video signal at that time. Here, one field or one frame period means that one field period is used for interlaced scanning, and one frame period is used for sequential scanning.
【０００３】[0003]
【発明が解決しようとする課題】以上のような従来の方
法を有する液晶表示装置では、液晶表示セル自体の時間
応答が十分速くなったとしても、任意のセルの発光は飛
越し走査方法での１フィールド時間をＴF とすれば図６
図示のごとくになる。通常テレビジョン信号は毎秒飛越
し走査で60または50フィールド伝送されるので、図６図
示のような発光をすると動画像の場合には動きが不自然
になり滑らかに動く視覚が得られにくくなる。その理由
は、図６図示の画像は、少なくとも１フィールド時間Ｔ
F 以上の期間にわたってその初期発光レベルを保持す
る、いわゆるホールド型発光である。一方、ひとの視線
は動くものに対して滑らかに追随するので、この種発光
は時間積分効果によりそのままぎくしゃくして見える。
これは、移動体の移動速度によっては輪郭のぼけとなっ
て見える。In the liquid crystal display device having the above-mentioned conventional method, even if the time response of the liquid crystal display cell itself becomes sufficiently fast, the light emission of any cell can be performed by the interlaced scanning method. Assuming that one field time is T F , FIG.
As shown in the figure. Normally, a television signal is transmitted 60 or 50 fields by interlaced scanning every second. Therefore, when light is emitted as shown in FIG. 6, in the case of a moving image, the movement becomes unnatural and it becomes difficult to obtain a smooth moving vision. The reason is that the image shown in FIG. 6 has at least one field time T
This is a so-called hold type light emission in which the initial light emission level is maintained for a period of F or more. On the other hand, since the line of sight of a person follows a moving object smoothly, the seed light appears to be jerky due to the time integration effect.
This appears as blurred outline depending on the moving speed of the moving object.
【０００４】そこで本発明の目的は、ほぼ100 ％の発光
時間率を有する表示装置において、全発光輝度をおとす
ことなく動画像表示の前述の動きの不自然さを削減した
表示装置を提供せんとするものである。ここで発光時間
率とは任意の表示セルが、１フィールドまたは１フレー
ム期間に対し発光を継続している時間割り合いである。Accordingly, an object of the present invention is to provide a display device having a light emission time rate of almost 100% and reducing the above-described unnaturalness of the moving image display without reducing the total light emission luminance. Is what you do. Here, the light emission time ratio is a time ratio in which an arbitrary display cell continues to emit light for one field or one frame period.
【０００５】[0005]
【課題を解決するための手段】前述の目的を達成するた
めの第１の発明に係る表示装置は、画像信号の画素に対
応するそれぞれがアナログメモリを有する多数の表示セ
ルを有する表示装置であって、かつ、受信入力画像信号
の画素に対応する信号をそれぞれ対応する前記メモリに
フィールドまたはフレームごとに記憶し、記憶された画
素信号に対応する電圧で、そのメモリに対応する前記表
示セルの発光輝度を制御し、前記対応する電圧でその表
示セルを継続発光させる表示装置において、当該装置
が、前記フィールド間または前記フレーム間に内挿すべ
き少なくとも１つの内挿画像信号を、その前後のフィー
ルドまたはフレーム画像信号から動き適応的に形成する
手段と、その形成された内挿画像信号を前記フィールド
またはフレーム画像信号とともに順次に使用して画像を
表示する手段とを具備し、画像の動きの不自然さを削減
するようにしたことを特徴とするものである。According to a first aspect of the present invention, there is provided a display device having a large number of display cells each having an analog memory corresponding to a pixel of an image signal. And a signal corresponding to the pixel of the received input image signal is stored in the corresponding memory for each field or frame, and the light emission of the display cell corresponding to the memory is performed at a voltage corresponding to the stored pixel signal. In a display device that controls brightness and continuously emits light in the display cell at the corresponding voltage, the device outputs at least one interpolated image signal to be interpolated between the fields or between the frames. Means for adaptively forming a frame image signal from a frame image signal; It is characterized in that and means for sequentially used to display an image, and to reduce the unnaturalness of motion of the image with No..
【０００６】また、第２の発明に係る表示装置は、画像
信号の画素に対応するそれぞれがアナログメモリを有す
る多数の表示セルを有する表示装置であって、かつ、受
信入力画像信号の画素に対応する信号をそれぞれ対応す
る前記メモリにフィールドまたはフレームごとに記憶
し、記憶された画素信号に対応する電圧で、そのメモリ
に対応する前記表示セルの発光輝度を制御し、前記対応
する電圧でその表示セルを継続発光させる表示装置にお
いて、当該装置が、前記継続発光させる期間または実効
的発光期間をそれぞれのフィールドまたはフレーム間で
少なくとも30％から70％を越えない範囲に制限する手段
を具備して、画像の動きの不自然さを削減するようにし
たことを特徴とするものである。A display device according to a second aspect of the present invention is a display device having a large number of display cells each having an analog memory and corresponding to a pixel of an image signal. Signals are stored in the corresponding memory for each field or frame, and the voltage corresponding to the stored pixel signal is used to control the light emission luminance of the display cell corresponding to the memory, and the display is performed using the corresponding voltage. A display device for continuously emitting cells, said device comprising means for limiting said continuous emission period or effective emission period to at least 30% to not more than 70% between respective fields or frames; The present invention is characterized in that unnaturalness of image movement is reduced.
【０００７】[0007]
【作用】本発明表示装置によれば、ほぼ100 ％の発光時
間率を有する表示装置において、動画を表示するにあた
り、入力のフィールドまたはフレーム信号から、受信装
置において、それらの間に挿入する内挿フィールドまた
は内挿フレーム信号を作り、それらを前記入力フィール
ドまたはフレーム信号とともに順次に表示したり、前記
ほぼ100 ％の発光時間率を少なくとも30％から70％を越
えない範囲に制限したりして表示しているので、動画像
も視覚的に滑らかになり、従来例の動きの不自然さが削
減される。According to the display device of the present invention, when displaying a moving image in a display device having a light emission time rate of approximately 100%, interpolation is inserted between the input field or frame signal in the receiving device. Create field or interpolated frame signals and display them sequentially with the input field or frame signal or limit the near 100% emission time rate to at least 30% to no more than 70% As a result, the moving image also becomes visually smooth, and the unnaturalness of the conventional motion is reduced.
【０００８】[0008]
【実施例】以下添付図面により本発明を詳細に説明す
る。以下の説明では、フィールドおよびフレーム信号と
内挿フィールドおよび内挿フレーム信号との関係は本願
発明では類似の関係にあるのでフィールドのみの関係を
取り扱うことにする。図１にこれに限定されない本発明
表示装置実施例に係る略構成図を示す。図の中間フィー
ルド発生器１は入力映像フィールド信号から図２に示す
ようにフィールド内挿信号も含んだ出力信号を出力する
作用を有する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. In the following description, the relationship between the field and the frame signal and the interpolated field and the interpolated frame signal is similar in the present invention, so that only the field will be dealt with. FIG. 1 shows a schematic configuration diagram according to an embodiment of the display device of the present invention which is not limited to this. The intermediate field generator 1 shown in the figure has an operation of outputting an output signal including a field interpolation signal from an input video field signal as shown in FIG.
【０００９】図２で左側の縦列は、フィールド周波数が
例えば60Hzの発生器１への入力画像信号（ｎ−１）フィ
ールド、ｎフィールドおよび（ｎ＋１）フィールドのフ
ィールド画像を模型的に示し、画の各フィールド内丸印
は画像がフィールドごとに図の左側から右側に移動する
様子を模型的に示している。図の右側の縦列は、本発明
によりフィールド周波数が入力画像信号の倍になった例
えば120Hz の発生器１からの出力画像信号（2n−２），
（2n−１），2n, （2n＋１），（2n＋２）フィールドの
画像を示し、その各フィールド内丸印は同様その模型的
動画像である。The left column in FIG. 2 schematically shows the field images of the input image signal (n-1) field, n field and (n + 1) field to the generator 1 having a field frequency of 60 Hz, for example. The circles in each field schematically show how the image moves from left to right in the figure for each field. The right column of the figure shows the output image signal (2n-2) from the generator 1 of, for example, 120 Hz whose field frequency is twice that of the input image signal according to the invention,
(2n-1), 2n, (2n + 1), and (2n + 2) field images are shown, and the circles in each field are model moving images.
【００１０】図の左側ブロックから右側ブロックへの矢
印実線は、右側ブロック図示の各フィールドが左側ブロ
ック図示のどのフィールドの画像情報をもとに作成され
るかを示すもので、例えば出力側の（2n−２），2n，
（2n＋２）フィールドは入力側（ｎ−１），ｎ，（ｎ＋
１）フィールドの画像情報よりそれぞれ作られ、出力側
の（2n−１），（2n＋１）フィールドすなわち内挿フィ
ールドはそれぞれ入力側の（ｎ−１），ｎフィールドと
ｎ，（ｎ＋１）フィールドの画像情報より作成されるこ
とを示している。内挿フィールドはこれに限らず例えば
出力側の（2n＋１）フィールドは入力側の（ｎ−１），
ｎ，（ｎ＋１），（ｎ＋２）フィールドの４つのフィー
ルド画像情報をもとに内挿されてもよい。ここでｎは勿
論１，２，３……の整数である。またこの例では、出力
と入力間フィールド周波数の比は２であるが勿論本発明
がこれに限定されないことは明白である。The solid line from the left block to the right block in the figure indicates which field shown in the right block is created based on the image information of which field shown in the left block. 2n-2), 2n,
(2n + 2) fields are input side (n-1), n, (n +
1) The (2n-1) and (2n + 1) fields on the output side, ie, the interpolation fields, are respectively formed from the image information of the fields, and the (n-1) and n fields and the n and (n + 1) fields on the input side, respectively. Indicates that it is created from information. The interpolation field is not limited to this. For example, the (2n + 1) field on the output side is (n-1),
The interpolation may be performed based on four field image information of n, (n + 1), and (n + 2) fields. Here, n is, of course, an integer of 1, 2, 3,.... Further, in this example, the ratio of the field frequency between the output and the input is 2, but it is obvious that the present invention is not limited to this.
【００１１】中間フィールド発生器１により作成された
120 フィールドの発光波形を図示すれば図３のごとくな
るが、この図で横軸の時間を表わすフィールド周期ＴF
はもとのすなわち発生器１の入力フィールドの周期であ
ることに注意されたい。Generated by the intermediate field generator 1
FIG. 3 shows the emission waveform of 120 fields. In this figure, the field period T F representing the time on the horizontal axis is shown.
Note that is the period of the original or input field of generator 1.
【００１２】図２，図３図示のような信号は周知の方
法、例えば、文献、田中豊他：ハイビジョン−PAL 方式
変換装置，NHK 技術研究，Vol.39, No.2, pp112-129, 1
987 に記載されている方法で作成される。すなわち、全
画面をいくつかのゾーンに分け画像の動きを検出し、そ
の像がある時刻にどこにあるかを推定して内挿する方法
である。等速運動であれば２枚の隣接するフィールドか
ら内挿フィールドを作りその間に挿入することができ
る。また１次の加速があればさらに前後２枚、計４枚の
フィールドから予測して内挿フィールドを作ることがで
きる。しかして作られたフィールド（図２出力側フィー
ルド）をつらねて表示すれば、表示装置の発光時間率が
ほぼ100 ％であっても十分滑らかな動きを表示すること
ができる。ただしこのフィールド周波数は下限が40Hz程
度であるといわれている。飛越し走査の信号と順次走査
の信号とは多少取り扱いが異なるが、それらはそれぞれ
周知の方法で対応可能である。The signals shown in FIGS. 2 and 3 can be obtained by a known method, for example, Literature, Yutaka Tanaka et al .: Hi-Vision-PAL system converter, NHK Technical Research, Vol. 39, No. 2, pp. 112-129, 1
Created as described in 987. That is, this method is a method in which the entire screen is divided into several zones, the motion of the image is detected, and where the image is located at a certain time is interpolated. In the case of constant velocity motion, an interpolated field can be created from two adjacent fields and inserted between them. If there is a primary acceleration, an interpolation field can be created by predicting from a total of four fields, two fields before and after. Thus, if the generated field (the output side field in FIG. 2) is displayed in a continuous manner, a sufficiently smooth movement can be displayed even if the light emission time rate of the display device is almost 100%. However, it is said that the lower limit of this field frequency is about 40 Hz. Although the interlaced scanning signal and the progressive scanning signal are handled slightly differently, they can be handled by well-known methods.
【００１３】動きを滑らかにする別の方法として発光時
間を短くする方法があるが、これを実施すると表示装置
の発光輝度が下ってしまう。そのため図４(a) に示すよ
うに発光時間の少なくとも30％から70％を越えない範囲
に制限すれば動きも滑らかになる。これが本明細書記載
になる第２の発明である。また、この第２の発明で発光
波形は完全に矩形にする必要はなく、図４(b) に示すよ
うにその発光の積分値が前述の％の時間幅と実効的に等
しくなるようにしてもよい。このようにすることによ
り、発光していない期間における画像は、ひとの頭のな
かで補間して感じとるようになり、従って、少なくとも
１フィールド時間ＴF以上の期間にわたるホールド型発
光（図６参照）でなくなり、画像の動きの不自然さを削
減することができる。As another method of smoothing the movement, there is a method of shortening the light emission time. However, if this method is implemented, the light emission luminance of the display device is reduced. Therefore, as shown in FIG. 4 (a), if the light emission time is limited to a range of at least 30% to not more than 70%, the movement becomes smooth. This is the second invention described in this specification. Further, in the second invention, the light emission waveform does not need to be completely rectangular, and as shown in FIG. 4 (b), the integrated value of the light emission is made to be effectively equal to the above-mentioned time width of%. Is also good. By doing so, the image in the period during which no light is emitted can be sensed by interpolating in the person's head, and therefore, hold-type light emission over a period of at least one field time TF (see FIG. 6) And the unnaturalness of the motion of the image can be reduced.
【００１４】最後に本発明に係る表示方法の適用できる
素子を以下にのべると、光量制御型としては液晶、カー
効果、フランツケルディッシュ効果、ファラデー効果そ
の他電気、磁気−光学効果を利用した素子、中間に超音
波などを介在させた素子などがあり、発光型としてはEL
（エレクトロ・ルミネセンス）、LED （ライト・エミッ
ティド・デバイス）、PDP （プラズマ・ディスプレイ・
パネル）、マトリクス形CRT （陰極線管）や発光素子を
並べた大型ディスプレイなどがある。Finally, the devices to which the display method according to the present invention can be applied are described below. As the light amount control type, devices utilizing the electric and magneto-optical effects such as liquid crystal, Kerr effect, Franz-Keldysh effect, Faraday effect, etc. There are elements such as ultrasonic waves in the middle, etc.
(Electroluminescence), LED (light-emitting device), PDP (plasma display
Panel), matrix-type CRT (cathode ray tube) and large display with light emitting elements arranged.
【００１５】[0015]
【発明の効果】以上詳細に述べてきたように、本発明表
示装置によれば、ほぼ100 ％の発光時間率を有する表示
装置において、受信表示側において従来とは異なる信号
処理をして画像の表示をしているので、動画像表示の場
合、動画の動きに対する不自然さが削減され、視覚的に
みて滑らかな動画像となり、しかも画像の輝度を落とさ
ないですむことができる。As described above in detail, according to the display device of the present invention, in a display device having a light emission time rate of almost 100%, signal processing different from the conventional one is performed on the receiving display side to perform image processing. Since the display is performed, in the case of displaying a moving image, unnaturalness with respect to the motion of the moving image is reduced, the moving image becomes visually smooth, and the luminance of the image does not need to be reduced.
【図１】本発明実施例に係る略構成図である。FIG. 1 is a schematic configuration diagram according to an embodiment of the present invention.
【図２】中間フィールド発生器の作用を説明するための
図である。FIG. 2 is a diagram for explaining the operation of an intermediate field generator.
【図３】本発明の表示装置を用いた場合の任意のセルの
発光波形である。FIG. 3 shows an emission waveform of an arbitrary cell when the display device of the present invention is used.
【図４】(a) は本発明で発光時間を短くした例の発光波
形、(b) は同発光時間を実質的に短くした例の発光波形
である。4A is a light emission waveform of an example in which the light emission time is shortened in the present invention, and FIG. 4B is a light emission waveform of an example in which the light emission time is substantially shortened.
【図５】従来の画像表示略構成図である。FIG. 5 is a schematic configuration diagram of a conventional image display.
【図６】従来の画像表示による任意のセルの発光波形で
ある。FIG. 6 is a light emission waveform of an arbitrary cell in a conventional image display.
１ 中間フィールド発生器 ２ プロセッサ ３ １フィールド記憶型表示デバイス 11 プロセッサ 12 シリ・パラ変換列駆動回路 13 行駆動回路 14 １フィールド記憶型表示デバイス 15 スイッチ 16 メモリ型液晶セル DESCRIPTION OF SYMBOLS 1 Intermediate field generator 2 Processor 3 1 Field storage type display device 11 Processor 12 Serial-para conversion column drive circuit 13 Row drive circuit 14 1 Field storage type display device 15 Switch 16 Memory type liquid crystal cell
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−263989（ＪＰ，Ａ) 特開 平１−174081（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H04N 5/66 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-263989 (JP, A) JP-A 1-174081 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) H04N 5/66
Claims (2)
ナログメモリを有する多数の表示セルを有する表示装置
であって、かつ、受信入力画像信号の画素に対応する信
号をそれぞれ対応する前記メモリにフィールドまたはフ
レームごとに記憶し、記憶された画素信号に対応する電
圧で、そのメモリに対応する前記表示セルの発光輝度を
制御し、前記対応する電圧でその表示セルを継続発光さ
せる表示装置において、 当該装置が、前記フィールド間または前記フレーム間に
内挿すべき少なくとも１つの内挿画像信号を、その前後
のフィールドまたはフレーム画像信号から動き適応的に
形成する手段と、その形成された内挿画像信号を前記フ
ィールドまたはフレーム画像信号とともに順次に使用し
て画像を表示する手段とを具備し、画像の動きの不自然
さを削減するようにしたことを特徴とする表示装置。1. A display device having a large number of display cells each having an analog memory corresponding to a pixel of an image signal, wherein a signal corresponding to a pixel of a received input image signal is stored in the memory corresponding to the pixel. Or a display device that stores the data for each frame, controls the light emission luminance of the display cell corresponding to the memory with a voltage corresponding to the stored pixel signal, and continuously emits light at the corresponding voltage. Means for adaptively forming at least one interpolated image signal to be interpolated between the fields or the frames from the preceding or succeeding field or frame image signals, and generating the interpolated image signal Means for displaying an image by using the field or frame image signal sequentially. Display device is characterized in that so as to reduce the naturalness.
ナログメモリを有する多数の表示セルを有する表示装置
であって、かつ、受信入力画像信号の画素に対応する信
号をそれぞれ対応する前記メモリにフィールドまたはフ
レームごとに記憶し、記憶された画素信号に対応する電
圧で、そのメモリに対応する前記表示セルの発光輝度を
制御し、前記対応する電圧でその表示セルを継続発光さ
せる表示装置において、 当該装置が、前記継続発光させる期間または実効的発光
期間をそれぞれのフィールドまたはフレーム間で少なく
とも30％から70％を越えない範囲に制限する手段を具備
して、画像の動きの不自然さを削減するようにしたこと
を特徴とする表示装置。2. A display device having a plurality of display cells each having an analog memory corresponding to a pixel of an image signal, wherein a signal corresponding to a pixel of a received input image signal is stored in said memory corresponding to each of said plurality of cells. Or a display device that stores the data for each frame, controls the light emission luminance of the display cell corresponding to the memory with a voltage corresponding to the stored pixel signal, and continuously emits light at the corresponding voltage. The apparatus comprises means for limiting the duration of the continuous light emission or the effective light emission period to at least 30% to not more than 70% between respective fields or frames to reduce the unnaturalness of image motion. A display device characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08913791A JP3295437B2 (en) | 1991-03-29 | 1991-03-29 | Display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08913791A JP3295437B2 (en) | 1991-03-29 | 1991-03-29 | Display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04302289A JPH04302289A (en) | 1992-10-26 |
| JP3295437B2 true JP3295437B2 (en) | 2002-06-24 |
Family
ID=13962492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08913791A Expired - Lifetime JP3295437B2 (en) | 1991-03-29 | 1991-03-29 | Display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3295437B2 (en) |
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