The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 18, 2021
Filed:
Jul. 25, 2017
Barco N.v., Kortrijk, BE;
Claude Daniel Tydtgat, Ledegem, BE;
Bart Van Den Bossche, Kuurne, BE;
BARCO N.V., Kortrijk, BE;
Abstract
A reflective display device and a method of making or operating the display device, where the reflective display device includes a spatial reflective light valve, at least one light emitting element being positioned in front of the spatial reflective light valve and light shaping device to direct the light generated by the at least one light emitting element in defined directions with respect to the spatial reflective light valve. This makes use of the fact that the contrast improves and the diffuse reflection component of the reflective display increases when the illumination direction gets closer to the perpendicular direction but rays close to the perpendicular direction need to be reduced in intensity or better still avoided to reduce the specular component. This can use illumination directions close to the perpendicular direction while preventing or reducing specular reflection within a range of incident angles.