Visual display terminal device & method for eye strain reduction

Details Visual display terminal device & method for eye strain reduction Visual display terminal device & method for eye strain reduction

1993-03-19

1995-07-11

Oberley, Alvin E.

Communications: electrical

Visual indication

With lamp enclosed in transparent housing

359601, 362234, G08B 500

Patent

active

054325048

ABSTRACT:
Disclosed is a device 10 for a video screen 16 which includes a support member 12 member disposed about the circumference of the video screen 16. The support member 12 has walls with interior reflective surfaces 30. A plurality of point light sources or lamps 32 are mounted to the support member 12 and positioned to provide to inner and outer concentric frames 50 and 52 of light on the screen 16. The inner frame 52 comprises a series of discrete point light images or dots 46 near the circumference of the screen 16 formed by light from the light sources being cast directly onto the screen. The outer frame 50 comprises a series of discrete point light images or dots near the circumference of the screen 16 formed by light from the light sources 32 first reflecting off the reflective surfaces 30 and then onto the screen 16. The intensity of the light from the inner frame 52 is less than the intensity of light from the outer frame 50.

REFERENCES:
patent: 1461131 (1923-07-01), Marten
patent: 2162791 (1937-10-01), Shreve
patent: 3843961 (1974-10-01), Mirell
patent: 4001810 (1977-01-01), Olsen
patent: 4577928 (1986-03-01), Brown
patent: 5159328 (1992-10-01), Albrecht
patent: 5219445 (1993-06-01), Bartenbach
IBM "Technical Disclosure Bulletin" 1977, p. 328.

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