Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 5714968 | Current-dependent light-emitting element drive circuit for use in active matrix display device In a light-emitting element drive circuit in an active matrix display device, at least one current-control transistor controls a current flowing through a light-emitting element. The current-control transistor and the light-emitting element are connected ... | 02/03/1998 |
| 5712533 | Power supply circuit for an electroluminescent lamp The power supply circuit for an electroluminescent lamp (7) comprises a transformer with two windings (4, 6). The primary winding (4) of the transformer is supplied cyclically by a battery via the intermediary of an "H" bridge. The use of an "H" bridge en... | 01/27/1998 |
| 5708451 | Method and device for uniforming luminosity and reducing phosphor degradation of a field emission flat display Nonuniformities of luminance characteristics in a field emission display (FED) are compensated pixel by pixel by storing a matrix of correction values, determined by testing, and by applying a corrected drive signal through the relative column drive stage... | 01/13/1998 |
| 5663748 | Electronic book having highlighting feature An electronic book includes a book-shaped housing having a first housing member pivotably connected to a second housing member to open and close in a book-like manner. A touchscreen displays a page of the text represented by the machine-readable data. A u... | 09/02/1997 |
| 5638091 | Process for the display of different grey levels and system for performing this process The invention relates to a method for displaying different levels of grey on a matrix screen including pixels arranged along R rows and M columns of images having QS levels of grey and obtained by addition to each pixel during the writing of im... | 06/10/1997 |
| 5627556 | Circuit for driving alternating current thin film electroluminescence device using relative potential difference A circuit for driving an AC TFEL device which is a complete solid luminescence element, capable of generating positive and negative AC voltages from a single DC voltage by utilizing a relative potential difference and thereby providing a compact voltage s... | 05/06/1997 |
| 5576601 | Drive circuit for electroluminescent panels and the like A drive circuit for an electroluminescent panel applies an AC voltage cycle at typical power cycle frequencies by increasing the voltage profile in discrete, pulsed steps at a rate which is at least one order of magnitude greater than the AC frequencies a... | 11/19/1996 |
| 5539425 | Display unit A display unit in which a black level is set to a predetermined level in a first display screen having a first aspect ratio and a black level is set to a predetermined level in a second display screen having a second aspect ratio is provided. A darkest si... | 07/23/1996 |
| 5521611 | Driving circuit for a display apparatus In the driving circuit for a display apparatus according to the present invention, a charging circuit applies a voltage equal to or higher than the highest positive gradation voltage to each data line for a predetermined period of time before the start of... | 05/28/1996 |
| 5519288 | Drive circuit for powder type electroluminescent device with charge and discharge control A powder type electroluminescent (EL) device comprises a step-up circuit for charging a capacitive EL element during a charge period, discharge transistor for discharging electric charge from the EL element during a discharge period, a voltage detector fo... | 05/21/1996 |
| 5325107 | Method and apparatus for driving a display device A display device, such as thin film EL display device, is formed by interposing a dielectric layer between a plurality of scanning electrodes and a plurality of data electrodes which are arranged at right angles. Modulation voltage is varied in accordance... | 06/28/1994 |
| 5315695 | Personal computer capable of altering display luminance through key operation A battery operable personal computer comprises a display, a keyboard, a CPU, and a power supply circuit. The display panel displays various types of data at a luminance level according to a value of a luminance control signal. The keyboard serves to enter... | 05/24/1994 |
| 5311169 | Method and apparatus for driving capacitive display device This invention relates to gradation display by a pulse width control method (PWM method) in every pixel in a capacitive display apparatus such as a liquid crystal display apparatus. The driving voltage applied to the electrodes is varied slowly, and the n... | 05/10/1994 |
| 5302966 | Active matrix electroluminescent display and method of operation An active matrix electroluminescent display (AMELD) having an improved light emitting efficiency and methods of operating the AMELD to produce gray scale operation comprises a plurality of pixels, each pixel including a first transistor having its gate co... | 04/12/1994 |
| 5262766 | Display unit having brightness control function A display unit includes a thin film EL display panel, a scanning side switching circuit connected to a scanning side electrode, a data side switching circuit connected to a data side electrode, a scanning side drive circuit which outputs a high voltage pu... | 11/16/1993 |
| 5155416 | Electron beam emitting device and image displaying device by use thereof An electron beam emitting device, includes a surface conduction type of thin film device having an electron emitting area and at least a pair of electrodes for passing current through the electron emitting area, and a voltage applicator for applying a vol... | 10/13/1992 |
| 5146213 | Electroluminescent display with memory effect and half-tones Electroluminescent display with memory effect and half-tones. Each row electrode (L) is subdivided into several subelectrodes (L1,L2) and/or each column electrode (C) is subdivided into several subelectrodes (C1,C2). The row subelectrodes receive differen... | 09/08/1992 |
| 5144292 | Liquid crystal display system with variable backlighting for data processing machine A data processing device is provided with a liquid crystal display incorporating electroluminescent backlighting, in which the electroluminescent backlighting panel is provided with several degrees of luminosity. A selection circuit specifies the degree o... | 09/01/1992 |
| 5090178 | Method of assembly for simplified container A two-part container assembly made up of a cover and a filler insert, both of which are assembled from precut unitary blanks. The filler insert has a bottom section and two end flaps. Articles to be packaged are placed upon the bottom of the filler insert... | 02/25/1992 |
| 5027036 | Drive circuit for an electroluminescence display device There is provided a drive circuit for an electro-luminescence (EL) display device comprising a variable frequency oscillator circuit whose output signal frequency is externally modifiable, a voltage booster circuit for boosting the output signal of said v... | 06/25/1991 |
| 4996523 | Electroluminescent storage display with improved intensity driver circuits In the present invention a matrix array of organic electroluminescent storage display elements along with row and column selection circuitry are used to select the particular display elements within the matrix to be illuminated. Interposed between the col... | 02/26/1991 |
| 4951041 | Driving method for thin film el display device and driving circuit thereof A driving method is described for thin film EL display devices having an EL layer interposed between scanning side electrodes and data side electrodes which are intersected to each other. The method comprises displaying frames formed by a line sequential ... | 08/21/1990 |
| 4853592 | Flat panel display having pixel spacing and luminance levels providing high resolution A flat panel matrix display pixel structure emulates raster scan cathode ray tube shadow mask resolution. A display generator connected to anti-aliasing and/or dot flair circuitry activates the display. A selected pixel is fully activated and surrouding p... | 08/01/1989 |
| 4847609 | Electroluminescence display panel configured for minimized power consumption An electroluminescent display panel formed of phosphor and dielectric layers sandwiched between opposing mutually intersecting arrays of drive electrodes, has the thickness of the phosphor layer set to a value which provides minimum power consumption, for... | 07/11/1989 |
| 4839563 | Pulse burst panel drive for electroluminescent displays A thin film electroluminescent display device energized with a rapid burst of pulses during a time less than the decay time of the phosphor yields substantially increased light output. Preferably, a burst of between two and forty pulses having a duration ... | 06/13/1989 |
| 4818982 | Brightness control for an electro-luminescent display A brightness control circuit for use with Plasma and Electroluminescent displays. The circuit receives from a computer, or other driving device, video data to be displayed, an intensity signal indicating the intensity with which to display data, a video c... | 04/04/1989 |
| 4772885 | Liquid crystal color display device A color display device has a liquid crystal unit for passing therethrough electromagnetic radiation dependent on image information. The color display device also has a light source including electroluminescent materials or fluorescent materials. The elect... | 09/20/1988 |
| 4758765 | Black layer for thin film EL display device A thin film EL display device having an EL light emitting layer sandwiched between a transparent electrode and an opposing electrode, wherein a light absorbing black layer containing constituent ingredients for the EL emission layer is disposed at the bac... | 07/19/1988 |
| 4710765 | Luminescent display device A luminescent display cell comprising a glass envelope having a front panel, a side wall, and a rear plate. Plural luminescent display segments are formed on the front panel of the glass envelope, the display segments being supplied with an anode voltage.... | 12/01/1987 |
| 4707638 | Luminance adjusting system for a flat matrix type cathode-ray tube A flat matrix cathode-ray tube (CRT) in which the brightness of a display picture can be readily adjusted according to environmental brightness. In the flat matrix CRT, the grid electrodes are made up of the scanning electrodes and the data electrodes whi... | 11/17/1987 |
| 4686575 | Very large color video matrix display apparatus with constant-current display cells driven by pulse-width-modulated video signals A video display system is disclosed, which includes a display device including a plurality of luminescent display cells arranged in an X-Y matrix form, each of the display cells having a cathode, a grid and a luminescent target electrode, a video signal s... | 08/11/1987 |
| 4559535 | System for displaying information with multiple shades of a color on a thin-film EL matrix display panel A plurality of memory sections is provided each storing binary data to be employed for refreshing picture elements of a thin-film EL matrix display panel on successive frame time periods constituting an integration time period. The number of frame time pe... | 12/17/1985 |
| 4488150 | Drive circuit for video display panel There is disclosed an image display device including a thin film EL element with crossing scan electrodes and data electrodes, a modulation circuit for applying data pulses of a varying amplitude to the respective ones of the data electrodes, and a scan c... | 12/11/1984 |
| 4210848 | Thin-film EL display panel with light-activated write and erase means For a thin-film EL display panel which exhibits the hysteresis loop phenomenon in the applied voltage versus brightness relationship, a string of alternating sustain pulses are applied, the amplitude of which is chosen at the voltage level appearing at th... | 07/01/1980 |
| 4193095 | Driver system of memory type gray-scale display panel A driver system of a display panel including a matrix of luminescent elements with a bi-stable operation condition comprises a circuit arrangement for combining a plurality of divided lighting periods to provide a gray-scale display and a circuit arrangem... | 03/11/1980 |
| 4170772 | Flat panel display with full color capability A color capability flat panel display comprised of the combination of two mi-independent linear displays. One of the displays is an active light emitting linear display and the other display is a passive light modulating linear display wherein both of the... | 10/09/1979 |
| 4087792 | Electro-optic display system An electro-optic display system is detailed in which an electro-optic display panel is driven by varying the on-time duty cycle during which the display medium is excited to generate the grey-scale brightness for an individual display element.... | 05/02/1978 |
