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公开(公告)号：EP0242124A1
公开(公告)日：1987-10-21
申请号：EP87303081.1
申请日：1987-04-09
摘要： A vertical deflection amplifier (20) of a video display apparatus includes first (Q1) and second (Q2) transistor amplifier output stages arranged in a totem-pole, push-pull configuration. A vertical deflection winding (Lv) is coupled to the output stages at a deflection amplifier output terminal (22). An S-capacitor (C1) is coupled to the deflection winding (L v ) at a second terminal (21) remote from the output terminal (22). A source (23) of deflection rate signals is coupled to the deflection amplifier (20) for generating a deflection current (iv) in the deflection winding (Lv). A base current generating circuit (40) is coupled to one (Q1) of the transistor amplifier output stages for providing base current (i 1) thereto. The S-capacitor voltage (V1) is applied to the base current generating circuit (40) for enabling conduction of base current (i1) in the one amplifier output stage (Q1). When the video display apparatus is first turned on, the initially discharged S-capacitor (C1) is slowly charged from a DC voltage supply (+30V) to delay generation of vertical deflection past completion of picture tube degaussing.
摘要翻译： 视频显示装置的垂直偏转放大器（20）包括以图腾柱推挽配置布置的第一（Q1）和第二（Q2）晶体管放大器输出级。 垂直偏转绕组（Lv）在偏转放大器输出端（22）处耦合到输出级。 S电容器（C1）在远离输出端子（22）的第二端子（21）处耦合到偏转绕组（Lv）。 偏转率信号的源极（23）耦合到偏转放大器（20），用于在偏转绕组（Lv）中产生偏转电流（iv）。 基极电流产生电路（40）耦合到晶体管放大器输出级的一个（Q1），以向其提供基极电流（i1）。 将S电容电压（V1）施加到基极电流发生电路（40），以使得能够导通一个放大器输出级（Q1）中的基极电流（i1）。 当视频显示装置首次接通时，初始放电的S电容器（C1）从DC电压源（+ 30V）缓慢充电，以延迟在显像管消磁完成之后产生垂直偏转。
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公开(公告)号：EP0219287A1
公开(公告)日：1987-04-22
申请号：EP86307675.8
申请日：1986-10-03
发明人： Haferl, Peter Eduard
IPC分类号： H04N9/29
CPC分类号： H04N9/29
摘要： A degaussing circuit for a cathode ray tube of a video display apparatus includes a resonating capacitor (C1) that is charged prior to degaussing. A degaussing coil (L DG ) is disposed about the cathode ray tube. An SCR (SCR1), responsive to an on/off control signal, is turned on by a control switch (Q1) for coupling the resonating capacitor (C1) to the degaussing coil (L DG ) in order to generate an AC degaussing current in the coil having an amplitude that diminishes to a low amplitude during a degaussing interval. Positive feedback (R2,C2) is used for speeding up the turn-on time of the control switch (Q1). A series pass transistor switch (Q2) couples a source (T1 or 51) of a supply voltage (VUR1) to a delay network (R7,C5). The series pass transistor switch (Q2) is coupled in the current path of the current that is supplied by the power supply. An energizing voltage (V Q ₂) is developed at the output of the delay network (R7,C5). The magnitude of the energizing voltage exceeds a predetermined value after a predetermined delay time following conduction of the transistor switch (Q2), that is determined by the delay network. The delayed energizing voltage is coupled to a deflection circuit (56,57,58) to initiate deflection circuit operation after conclusion of the degaussing.
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公开(公告)号：EP0178857A2
公开(公告)日：1986-04-23
申请号：EP85307284.1
申请日：1985-10-11
发明人： Chen, Hsing-Yao
IPC分类号： H01J29/50
CPC分类号： H01J29/503 , H01J2229/4841 , H01J2229/4865 , H01J2229/4872
摘要： An inline electron gun (26:26') for a cathode-ray tube (8) includes an improved beam forming region comprising three cathodes (34), a control grid (36) and a novel screen grid electrode means (38, 38'), the latter comprising two spaced apart metal members (G2a, G2b;G2a',G2b'). In one embodiment (26), the first member (G2a) closest to the control grid is relatively thick and has three slots (52) formed in one surface thereof facing away from the control grid. Circular apertures (54) are formed within the slots and extend through the body of the first member. The second member (G2b) has three circular apertures (56) therethrough aligned with the circular apertures in the first member. When a dynamic signal is superimposed on the DC bias voltage and applied to the second member, the first member shields the control grid from the dynamic signal so that little or no brightness modulation occurs. In a second embodiment (26'), the first (G2a') and second (G2b') members of the screen grid (38') are structurally interchanged. In a third embodiment, the first (G2a) and the second (G2b) members have orthogonally disposed rectangular slots formed in facing surfaces.
摘要翻译： 用于阴极射线管（8）的直列式电子枪（26:26'）包括改进的射束形成区域，该射束形成区域包括三个阴极（34），控制栅极（36）和新颖的栅格栅极电极装置（38,38' ），后者包括两个间隔开的金属构件（G2a，G2b; G2a'，G2b'）。 在一个实施例（26）中，最接近控制栅格的第一构件（G2a）相对较厚并且具有形成在其背离控制栅格的一个表面中的三个狭槽（52）。 圆形孔（54）形成在槽内并延伸穿过第一构件的主体。 第二构件（G2b）具有三个与第一构件中的圆形孔对齐的圆形孔（56）。 当动态信号叠加在直流偏置电压上并施加到第二部件上时，第一部件将控制栅极与动态信号隔离开，使得很少或不发生亮度调制。 在第二实施例（26'）中，筛网（38'）的第一（G2a'）和第二（G2b'）构件在结构上互换。 在第三实施例中，第一（G2a）和第二（G2b）构件具有在相对表面中形成的正交设置的矩形槽。
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34.发明公开Progressive scan television apparatus for non-standard signals 失效Fernsehempfängermit progressiver Abtastungfürnicht normgerechte Signale。
公开(公告)号：EP0163514A1
公开(公告)日：1985-12-04
申请号：EP85303729.9
申请日：1985-05-28
IPC分类号： H04N5/44
CPC分类号： H04N7/012
摘要： Phase detectors (202, 204) in a progressively scanned television receiver measure the phase of the receiver video speed-up memory read (8 fsc ) and write (4 fsc ) clocks with respectto the double line-rate horizontal sweep signal (FB) of the display. Delay means (34, 36) are provided for delaying the video signal recovered from the memory (30, 32) as a function of the difference (224) between the read and write clock phase measurements each time the memory is read. The delay is effective for minimizing visible artifacts which otherwise may tend to occur when displaying "non-standard" video signals wherein the ratio of the color- subcarrier frequency to the line-frequency of the incoming video signal differs from a given broadcasting standard.
摘要翻译： 逐步扫描的电视接收机中的相位检测器（202,204）测量接收机视频加速存储器读取（8fsc）的相位和相对于双线速率水平扫描信号（FB）的写入（4fsc）时钟 显示。 提供延迟装置（34,36），用于在每次读取存储器时读取和写入时钟相位测量值之间的差值（224）延迟从存储器（30,32）恢复的视频信号。 当显示“输入视频信号的彩色副载波频率与输入视频信号的频率之间的比率”与给定的广播标准不同时显示“非标准”视频信号时，该延迟对于最小化可能会发生倾斜的可见伪影是有效的。
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公开(公告)号：EP0147981A1
公开(公告)日：1985-07-10
申请号：EP84308661.2
申请日：1984-12-13
发明人： Hettiger, James
CPC分类号： H04N9/44
摘要： In a color TV receiver incorporating automatic kinescope bias (AKB) control circuits, a first train (rb) of monolevel pulses with timing suitable for retrace blanking purposes and a second train (bg) of monolevel pulses with "backporch" timing appropriate for burst gating purposes are applied to a circuit serving to generate at a first terminal (P) a train of bilevel pulses exhibiting a first voltage level during periods of overlapping of the pulses of the first and second trains, and exhibiting a second, lesser voltage level during the remaining, non-overlapping portions of the pulses of the first train. A resistor (30) interconnects the first terminal with a second terminal (J). A keyed voltage source (33), responsive to a third train (a) of monolevel pulses timed to indicate recurring kinescope bias control intervals, develops a voltage of a third level, intermediate the first and second voltage levels, at the second terminal during-the recurring control intervals. The keyed voltage source exhibits, during the control intervals, an output impedance significantly lower than the impedance exhibited by the interconnecting resistor (30). During periods intervening successive ones of the control intervals, the voltage source is effectively disabled and exhibits an output impedance significantly higher than the impedance exhibited by the resistor.
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公开(公告)号：EP0332091B1
公开(公告)日：1996-05-22
申请号：EP89103820.0
申请日：1989-03-04
发明人： Haferl, Peter Eduard
IPC分类号： H04N3/233
CPC分类号： H04N3/233 , H02M2001/0032 , H04N5/63 , Y02B70/16
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37.发明公开
公开(公告)号：EP0611511A1
公开(公告)日：1994-08-24
申请号：EP92912690.0
申请日：1992-03-12
发明人： NG, Sheau-Bao
CPC分类号： H04N19/577 , H04N19/174 , H04N19/423 , H04N19/61 , H04N19/89 , H04N19/895
摘要： Dans un système de décompression vidéo destiné à décomprimer des données d'images comprimées dans lesquelles des trames paires et impaires de signaux vidéo sont comprimées en séquences de modes de compression de trames de même source et de trames de sources différentes et entrelacées pour la transmission, les trames paires et impaires sont décomprimées séparément. Au cours des intervalles pendant lesquels des données de trames paires/impaires valides décomprimées (45, 46) ne sont pas disponibles, des données de trames paires/impaires sont substituées (47-51) aux données de trames paires/impaires non disponibles. La décompression séparée des trames paires et impaires de données et la substitution par la trame de données opposée des données non disponibles peut être avantageusement utilisée pour réduire le temps de latence de l'affichage d'images pendant le démarrage du système et les changements de canaux.
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公开(公告)号：EP0539524A1
公开(公告)日：1993-05-05
申请号：EP91915732.0
申请日：1991-07-19
CPC分类号： H04N3/26 , H01J29/563 , H01J29/76 , H04N9/285
摘要： Appareil à déflexion comprenant un tube cathodique et produisant un gradient de champ réduisant la tendance d'un axe principal d'un point de balayage à s'allonger à chaque coin,à chaque extrémité d'axe horizontal et à chaque extrémité d'axe coaxial d'un écran de visualisation (22) comparativement au point de balayage situé au centre de l'écran de visualisation. Un stigmateur de point de balayage (24) permet de rendre le point de balayage sensiblement anastigmatique à chaque coin, à l'extrémité de l'axe horizontal et l'extrémité de l'axe vertical de l'écran de visualisation. Selon un mode de réalisation de l'invention, des moyens (11) sont prévus pour produire un premier champ non uniforme agissant comme une lentille et comprenant une partie variable dans le temps non produite par les bobines de déflexion (10, 99), lesdits moyens (11) comprenant un doublet quadripolaire.
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39.发明授权
公开(公告)号：EP0202876B1
公开(公告)日：1991-10-30
申请号：EP86303732.1
申请日：1986-05-16
CPC分类号： H01J29/485 , H01J9/18 , H01J2229/4872 , H01J2229/4896
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公开(公告)号：EP0183488B1
公开(公告)日：1991-10-16
申请号：EP85308473.9
申请日：1985-11-21
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