Projection type television apparatus

Details Projection type television apparatus Projection type television apparatus

1990-12-20

1992-09-01

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 64, 358253, 313474, 313112, 359722, 359589, H04N 914

Patent

active

051444178

ABSTRACT:
In a projection type television apparatus, a first and a second color selecting device are located on an optical light path passing through a cathode ray tube and a series of projection lenses are disposed in front of the cathode ray tube without a color selecting device therein. The first color selecting device has a high refractive factor to light having a wavelength of 570nm or more and the second color selecting device has a high reflection factor or a high absorption factor to light having a wavelength of 520nm or less. With this color selecting device, the range of color reproduction can be much more improved. This thus causes an increased degree of color purity of green light at the central and peripheral areas of the cathode ray tube. Moreover, with this arrangement, it becomes easy to conserve the characteristic of the color selecting devices and to facilitate the manufacturing operation.

REFERENCES:
patent: 4634926 (1987-01-01), Vriens et al.
patent: 4679069 (1987-07-01), Andren et al.
patent: 4683398 (1987-07-01), Vriens et al.
patent: 4804884 (1989-02-01), Vriens et al.
patent: 4987483 (1991-01-01), Tsukagoshi et al.

Affiliated with

Also associated with

Rating

Projection type television apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Projection type television apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Projection type television apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-772133