公开(公告)号：JPH0282891A

公开(公告)日：1990-03-23

申请号：JP23542688

申请日：1988-09-20

Applicant: SONY CORP

Inventor： ONO SATORU ,  WAKITA SHINJI ,  IWAMA JUN ,  HATANAKA MASATO

IPC: H04N9/24

Abstract: PURPOSE:To prevent the occurrence of color shear of an edge of a displayed character by supplying a character signal to a color picture tube and combining the color of the character with plural three primary colors in the case of displaying the character. CONSTITUTION:A character signal generating circuit 15 receives a display instruction generated by a microcomputer 12 to generate a display signal for, e.g., time display. The 3 primary color signals of the display signal are supplied to other input terminal of switch circuits 14R, 14G, 14B respectively. The color of the displayed character is selected as the combination of plural colors of the 3 primary color signals such as red R and green G, that is, yellow. Since the color of the displayed character is selected not by a single color of the 3 primary colors but by the combination of plural colors in this way, no disturbance in the phase of an index signal is caused at a border transited from a display area of a background to a display area of the character and production of color shear is prevented.

公开(公告)号：JPH0254679A

公开(公告)日：1990-02-23

申请号：JP20619788

申请日：1988-08-19

Applicant: SONY CORP

Inventor： IWAMA JUN ,  WAKITA SHINJI ,  HISADA OSAMU ,  HATANAKA MASATO

IPC: H04N5/05 ,  H04N9/00 ,  H04N9/24

Abstract: PURPOSE:To prevent the production of step out of synchronism and to improve character display by providing a signal generating means fixing an oscillating frequency of a horizontal synchronizing oscillator to a prescribed value based on a signal controlling the changeover. CONSTITUTION:A video signal inputted to input terminals 1, 2 is selected by a changeover switch 3 and fed respectively to a synchronizing deflection circuit 5 and a television/character switching circuit 6. When a control signal is supplied from a microcomputer 12, a horizontal frequency signal and a vertical frequency signal fixed respectively equal to the horizontal frequency and the vertical frequency are formed and the horizontal frequency signal and the vertical frequency signal are fed respectively to a character generating circuit 8. On the other hand, when a video signal is supplied, the horizontal frequency signal and the vertical frequency signal synchronously with the horizontal synchronizing signal and the vertical synchronizing signal in the video signal are formed and fed respectively to a character generating circuit 8. Thus, the production of out of synchronism is prevented even if character display is applied in the absence of any video signal.

公开(公告)号：JPH113050A

公开(公告)日：1999-01-06

申请号：JP16805497

申请日：1997-06-10

Applicant: SONY CORP

Inventor： HAYASHI MASAYASU ,  IWAMA JUN ,  YOSHIMI TOMOAKI

IPC: G02F1/1333 ,  G02F1/133 ,  G09F9/313 ,  G09F9/35 ,  G09G3/20 ,  G09G3/28 ,  G09G3/36

Abstract: PROBLEM TO BE SOLVED: To achieve the increase in a resolution of a plasma address display device without affecting an aperture rate and an electrical resistance of a signal electrode. SOLUTION: A plasma address display device consists of display cell 1 modulating incident light into exit light according to picture signals for displaying a picture, and a plasma cell 2 surface-joining with the display cell and scanning it. The plasma cell 2 has discharge channels 5 arranged in lines and discharges successively to scan them line-sequentially. The display cell 1 has signal electrodes 10 arranged in columns and forms picture elements 11 at the points of intersecting the discharge electrodes 5 and also impresses the picture signals synchronizing with the linesequential scanning to modulate incident light at each picture element 11. Picture elements for two lines are specified for discharge channels for one line. Namely, the intersections of each signal electrode 10 and the discharge channels 5 are partially shielded by a mask M according to a predetermined pattern, and transparent parts left at the intersections are distributed to the picture elements 11 for any one line, and picture signals are impressed on picture elements 11 for two lines at the same time by means of discharge of the discharge channels 5 for one line.

公开(公告)号：JPH09197367A

公开(公告)日：1997-07-31

申请号：JP2203296

申请日：1996-01-12

Applicant: SONY CORP

Inventor： IWAMA JUN

IPC: G02F1/1333 ,  G02F1/133 ,  G09G3/36

Abstract: PROBLEM TO BE SOLVED: To suppress excess voltage impression by adaptively controlling the voltage impressed to discharge channels in a plasma address display device. SOLUTION: The plasma address display device uses a flat panel 0 as a display and has structure obtained mutually superposing a plasma cell 2 provided with discharge channels in rows and a display cell 1 provided with a signal electrodes 12 in columns A driving circuit 23 executes line-sequential scanning by successively supplying impression voltage to the cathode electrode K sides of respective discharge channels and generating discharge. A signal circuit 21 supplies picture signals to respective signal electrodes 12 synchronously with the line-sequential scanning to display a picture on a screen 20. A constant current circuit 24 acts so as to allow a fixed discharge current to flow into respective discharge channels after the generation of discharge. A detection circuit 31 samples discharge voltage when the fixed discharge current flows into respective discharge channels. A control circuit 32 adaptively adjusts the impression voltage supplied to respective discharge channels in accordance with the sampled discharge voltage.

公开(公告)号：JPH08304765A

公开(公告)日：1996-11-22

申请号：JP13287395

申请日：1995-05-02

Applicant: SONY CORP

Inventor： IWAMA JUN

IPC: G02F1/1333 ,  G02F1/133 ,  G09G3/36

Abstract: PURPOSE: To adjust liquid crystal driving signals by monitoring display luminance of liquid crystal cells. CONSTITUTION: Plasma cells included in a panel 0 array in rows charging channels consisting of pairs of cathode electrodes K and anode electrodes A. The liquid crystal cells are overlaid on the plasma cells, and have signal electrodes D1 -Dm in columns crossing the discharging channels inside of the display area and reference electrodes Dref overlaying on a part of the discharging electrode outside of the display area. The scanning circuit 2 supplies sequentially selection pulses to the cathode electrodes K and performs line sequential scanning of the discharging channels. The driving circuit 3 supplies AC signal voltages between the signal electrodes D1 -Dm and the anode electrodes A and varies the display luminance of the liquid cells, and also provides a reference luminance by supplying a constant AC voltage between the reference electrodes Dref and the anode electrodes A. A photo-detection displays 5 are arrayed matching to the reference electrodes Dref and output detected signals according to the reference luminance. A control circuit 6 lies between the driving circuit 3 and the photo-detecting element 5 and controls the AC signal voltages impressed on the liquid crystal cells according to the detected signals to adjust the display luminance.

公开(公告)号：JPH08304764A

公开(公告)日：1996-11-22

申请号：JP13287295

申请日：1995-05-02

Applicant: SONY CORP

Inventor： IWAMA JUN

IPC: G02F1/1333 ,  G02F1/133 ,  G09G3/36

Abstract: PURPOSE: To provide an inverse driving method so that no defective display appears in spite of chipping-off part in a separate structure of a horizontal scanning line. CONSTITUTION: A plasma address liquid crystal display device is provided with a flat panel 0, a driving circuit 1 and a scanning circuit 2. The flat panel 0 has a mutually laminated structure of plasma cells provided with charging channels constituting the horizontal lines and liquid crystal cells provided with signal electrodes D constituting the vertical lines. The scanning circuit 2 repeats for each field a successive line scanning for a selection of a horizontal line by successively discharging the discharging channels. The driving circuit 1 impresses the signal electrodes D with a polarity inversing AC signal in synchronism with the successive line. This driving circuit 1 sets a delimiter to divide the horizontal lines at every multiple lines, and inverses the polarity of the AC signal every time when the horizontal line selected according to the successive scanning exceeds the delimiter. In this case, two successive fields control the delimiters to be the same, while controlling the AC signals to be inverted to each other on the other hand. Further, the positions of the delimiters are altered at every two fields and the horizontal lines influenced by the polarity inversion are dispersed through multiple fields.

公开(公告)号：JPH06102834A

公开(公告)日：1994-04-15

申请号：JP27513992

申请日：1992-09-18

Applicant: SONY CORP

Inventor： IWAMA JUN

IPC: G02F1/133 ,  G02F1/1333 ,  G09G3/20 ,  G09G3/36 ,  H01J17/49 ,  H04N5/66

Abstract: PURPOSE:To effectively perform the sequential line scanning of a plasma address electro-optical device and to stabilize the writing of a signal voltage. CONSTITUTION:A plasma address electro-optical device is provided with an electro-optical cell 1, a plasma cell 2, a signal circuit, a cathode scanning circuit and an anode switching circuit. The electro-optical cell 1 has signal electrodes D arranged in column. The signal circuit supplies a signal voltage to the signal electrodes D. The plasma cell 2 is superimposed on the electro-optical cell 1 and has cathode electrodes K and anode electrodes A alternately arranged in the row. The anode switching circuit changes over an anode voltage having an opposite phase and applies the voltage to an odd numbered anode Ao and an even numbered anode Ae. The cathode scanning circuit successively supplies a cathode voltage, plasma discharge is made to generate between an odd numbered anode electrode Ao and an even numbered anode Ae located adjacent to both sides of the selected cathode electrode K and addresses the electro- optical cell 1. By turning off the cathode voltage for a prescribed time according to the changeover timing of the anode voltage, the fluctuation of a discharge potential is removed.

公开(公告)号：JPH0675536A

公开(公告)日：1994-03-18

申请号：JP24882492

申请日：1992-08-25

Applicant: SONY CORP

Inventor： IWAMA JUN

IPC: G02F1/1333 ,  G02F1/133 ,  G09G3/20 ,  G09G3/36 ,  H04N5/66

Abstract: PURPOSE:To suppress the crosstalks occurring in the discharge space floating capacity of the plasma address display device. CONSTITUTION:This plasma address display device has a structure integrally laminated with a display cell 1 and a plasma cell 2 via a dielectric sheet 3. The liquid crystal cell 1 has plural signal electrodes D constituting column signal lines. The plasma cell 2 has plural anode/cathode electrode pairs A1/K1, A2/K2,... constituting row scanning lines. A horizontal signal circuit 11 supplies image signals to the signal electrodes D. A vertical scanning circuit 13 successively linearly scan the respective anode/cathode electrode pairs and supplies driving voltages thereto in the respective selection periods. A crosstalk suppressing means which maintains both of a pair of the anode electrodes and the cathode electrodes in a low-impedance state during the selection periods and simultaneously changes over both to a high impedance state during the non-selection periods is provided. This crosstalk suppressing means is constituted of anode changeover switches SA1 to SA4 respectively connected to the anode electrodes and cathode changeover switches SK1 to SK4 respectively connected to the cathode electrodes.

公开(公告)号：JPH05303349A

公开(公告)日：1993-11-16

申请号：JP13182292

申请日：1992-04-24

Applicant: SONY CORP

Inventor： IWAMA JUN

IPC: G09G3/20 ,  G02F1/133 ,  G02F1/1333 ,  G09G3/36 ,  H04N5/66

Abstract: PURPOSE:To lower a voltage at the time of executing AC driving. CONSTITUTION:Signal electrodes L are formed on the inside surface of an upper glass substrate 4. Plural plasma electrodes 8 consisting of anodes A and cathodes K are formed on the inside surface of a lower glass substrate 7. A liquid crystal layer 6 is packed between the upper glass substrate 4 and an intermediate deriv. sheet 3. A plasma chamber 11 is provided between the deriv. sheet 3 and the lower glass substrate 7 and an ionizable gas is encapsulated within this chamber. The gas is selectively ionized by the discharge between the cathodes K and the anode A to drive the liquid crystal layer 6 existing in the intersected parts of the signal electrodes L and the discharge regions. An inversion circuit 22 is included in this driving circuit to simultaneously invert the potentials of the image signals SL to be impressed to the signal electrodes L and the anodes A with the approximately intermediate potential VLref of the driving voltage VL of the liquid crystal layer 6 as a reference.

公开(公告)号：JPH03158822A

公开(公告)日：1991-07-08

申请号：JP29932889

申请日：1989-11-17

Applicant: SONY CORP

Inventor： YANO TOMOYA ,  IWAMA JUN

IPC: G02F1/133 ,  G02F1/1347

Abstract: PURPOSE:To increase the total number of scanning lines without reducing contrast and to obtain a colorless black-and-white image with high resolution by sealing two kinds of liquid crystal materials having the same twist angle and respectively reversed revolution into 1st and 2nd liquid crystal cells and alternately arranging the row electrodes of the 1st and 2nd liquid crystal cells so that the row electrode of one cell is arranged between the line electrodes of the other cell. CONSTITUTION:The 1st liquid crystal cell 17 having a liquid crystal layer 11 set up to >=180 deg. twist angle and plural row and column electrodes 8, 13 and the 2nd liquid crystal cell 16a characterized by reversed resolution against the cell 17 and having a liquid crystal layer 4a set up to >=180 deg. twist angle and plural row and column electrodes 8a, 13a are laminated. The product d1.DELTAn1 of the layer thickness of the layer 11 of the cell 17 and its double refractive index DELTAn1 is set up larger than the product d2.DELTAn2 of the layer thickness of the layer 4a of the cell 16a and its double refractive index DELTAn2, the difference between both the products is set up to