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1. WO1996005589 - A SYSTEM AND METHOD FOR ACHIEVING UNIFORM SCREEN BRIGHTNESS WITHIN A MATRIX DISPLAY

Publication Number WO/1996/005589
Publication Date 22.02.1996
International Application No. PCT/US1995/010456
International Filing Date 16.08.1995
Chapter 2 Demand Filed 14.03.1996
IPC
G09G 3/22 2006.01
GPHYSICS
09EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
20for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix
22using controlled light sources
CPC
G09G 2320/02
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2320Control of display operating conditions
02Improving the quality of display appearance
G09G 2320/0209
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2320Control of display operating conditions
02Improving the quality of display appearance
0209Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
G09G 2320/029
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2320Control of display operating conditions
02Improving the quality of display appearance
029by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
G09G 3/2014
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
20for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix ; no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
2007Display of intermediate tones
2014by modulation of the duration of a single pulse during which the logic level remains constant
G09G 3/22
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
20for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix ; no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
22using controlled light sources
Applicants
  • SI DIAMOND TECHNOLOGY, INC. [US/US]; 2435 North Boulevard Houston, TX 77098-5015, US
Inventors
  • BAKER, Robert, C.; US
  • DONOGHUE, William, J.; US
  • KELLEY, Stephen, H.; US
  • HILBERT, Claude; US
Agents
  • KORDZIK, Kelly, K. ; Winstead Sechrest & Minick P.C. Suite 5400 1201 Elm Street Dallas, TX 75270, US
Priority Data
08/292,13517.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) A SYSTEM AND METHOD FOR ACHIEVING UNIFORM SCREEN BRIGHTNESS WITHIN A MATRIX DISPLAY
(FR) SYSTEME ET METHODE PERMETTANT D'OBTENIR UNE LUMINOSITE D'ECRAN UNIFORME DANS UN AFFICHAGE MATRICIEL
Abstract
(EN)
A system and method for producing uniform energy dissipation in display pixels (290, 292) with widely varying electrical characteristics in order to equalize light output and improve yield within a matrix addressable display panel (192). The present invention is implemented within a driver circuit utilizing the concept of current integration. A reference voltage, which is proportional to the most efficient pixel within the display is compared to the energy dissipated within a particular pixel during illumination of that pixel. A current mirror circuit (303) supplies a current equivalent to the current provided to the object pixel to an integrator circuit resulting in a rising voltage within the integrator circuit. The rising voltage is proportional to the energy being dissipated within the current pixel. Once the rising voltage is equal to or greater than the reference voltage, current is removed from the object pixel.
(FR)
Système et méthode permettant d'obtenir une dissipation uniforme de l'énergie entre des pixels de visualisation (290, 292) présentant des caractéristiques électriques très diverses, afin d'égaliser la production de lumière et améliorer le rendement d'un panneau d'affichage matriciel adressable (192). Cette invention est mise en ÷uvre dans un circuit d'attaque appliquant le concept de l'intégration de courants. Une tension de référence, qui est proportionnelle au pixel le plus efficace de l'affichage, est comparée à l'énergie dissipée dans un pixel particulier au cours de l'illumination de ce pixel. Un circuit en miroir de courant (303) applique un courant équivalent au courant fourni au pixel cible à un circuit intégrateur, ce qui a pour effet d'élever la tension dans le circuit intégrateur. La tension croissante est proportionnelle à l'énergie dissipée dans le pixel courant. Une fois que la tension croissante est égale ou supérieure à la tension de référence, le courant cesse d'être appliqué au pixel cible.
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