Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1986-12-02
1989-08-08
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
128633, 358168, H01J 2952
Patent
active
048556505
ABSTRACT:
The graphic processor output dynamic range corrector system according to the present invention includes an input adapter for receiving a brightness signal from a graphic processor, an attenuator with an adjustable attenuation coefficient connected to the output of the input adapter, a reference voltage generator with an adjustable voltage level, a summing circuit for receiving output signals from the attenuator and reference voltage generator and for producing a corrected brightness signal, and decoding logic circuits connected to a computer connected to the graphic processor via an input interface, and connected to the attenuator and the reference voltage generator to control adjustment of the attenuation coefficient of the attenuator and the reference voltage level of the generator. The correction generator can be used in a brightness contrast analysis instrument equipped with a CRT to display stimuli at various spatial and time frequencies.
REFERENCES:
patent: 4030125 (1977-06-01), Bedell et al.
patent: 4527197 (1985-07-01), Nolte
Menu Jean-Pierre
Seigneur Jean-Michel
Blum Theodore M.
Etat Francais
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