1
Leendert Vriens, Gerard Acket, Cornelis Ronda: UV/blue led-phosphor device with efficient conversion of UV/blues light to visible light. Philips Electronics North America Corporation, John C Fox, September 29, 1998: US05813753 (550 worldwide citation)

A light emitting device for use in lighting and/or display applications includes a UV/blue LED located in a depression having reflecting sidewalls, a light transmitting material surrounding the LED and filling the depression, and a phosphor in the form of particles either dispersed in the light tran ...


2
Barry Singer, Cornelis R Ronda, Leendert Vriens: UV/blue LED-phosphor device with short wave pass, long wave pass band pass and peroit filters. Philips Electronics North America Corporation, John C Fox, September 29, 1998: US05813752 (168 worldwide citation)

A visible light emitting device for use in lighting and/or display applications includes a UV LED, a phosphor layer on the upper, main light emitting surface of the LED, and a short wave pass (SWP) filter between the LED and the phosphor layer to transmit UV light from the LED to the phosphor layer, ...


3
Leendert Vriens: Electro-optic color display including luminescent layer and interference filter. U S Philips Corporation, John C Fox, April 18, 1989: US04822144 (62 worldwide citation)

In a color display device (LCD) (1) driven in the transmission mode and based on the combination of (LCD) switching elements and a phosphor pattern, the phosphor pattern being irradiated, for example by a UV source, the light output is considerably increased by arranging an interference filter betwe ...


4
Leendert Vriens: Projection device and associated electro-optic monochrome display device with phosphor layer and interference filters. U S Philips Corporation, John C Fox, November 21, 1989: US04882617 (53 worldwide citation)

A projection device features at least one monochrome display device including electro-optic means defining a pattern for display, a monochrome luminescent layer, a first interference filter for reflecting the luminescent emission forward toward a display screen, and a second interference filter for ...


5
Leendert Vriens, Johannes H M Spruit, Johannes C N Rijpers, Titus E C Brandsma: Display tube provided with an interference filter. U S Philips Corporation, Norman N Spain, January 6, 1987: US04634926 (36 worldwide citation)

A display tube comprising in an evacuated envelope (1) a display screen (7) provided on the inside of a display window (2) in the wall of the envelope (1), which display screen (7) comprises luminescent material (13), and a multilayer interference filter (12) is provided between this material and th ...


6
Leendert Vriens, John A Clark, Johannes H M Spruit: Projection television display tube and device having interference filter. U S Philips Corporation, John C Fox, July 28, 1987: US04683398 (29 worldwide citation)

A projection television display tube comprising in an evacuated envelope a display screen on the convexly curved inside of a display window in the wall of the envelope, which display screen comprises a layer of luminescent material and a multilayer interference filter between said material layer and ...


7
Gerrit B Gerritsen, Leendert Vriens, Johannes C van de Ven: Rear projection screen and rear projection system provided with such a screen. U S Philips Corporation, Thomas A Briody, Algy Tamoshunas, Marianne R Rich, August 9, 1988: US04762393 (27 worldwide citation)

The vertical viewing angle of a rear projection screen having a large horizontal viewing angle and good color correction due to the special shape of the light dispersing elements provided on the front side of the plate is increased by elements provided on the rear side and extending in a direction p ...


8
Leendert Vriens, Johannes H M Spruit, John A Clarke: Display tube having improved brightness distribution. U S Philips Corporation, F Brice Faller, February 14, 1989: US04804884 (24 worldwide citation)

A projection television system comprising an array of three projection television display tubes (14) luminescing in red, green and blue, a focusing lens (16) associated with each tube and a display screen (12) on which the respective optical images are merged to form a single multicolored image. At ...


9
Leendert Vriens, Gerrit B Gerritsen, Willem M Van Alphen: Projection television display tube with cooling means and display device having such a display tube. U S Philips Corporation, John C Fox, February 6, 1990: US04899080 (22 worldwide citation)

Projection television display tubes having an evacuated envelope (1) with a display window (4) which on its inside comprises a display screen (5) and in front of which a light permeable second window (6) is provided on its outside, a cooling liquid (16) flowing through the space (7) between the disp ...


10
Ralph H Bradley, Leendert Vriens, William F Guerinot, Jill F Goldenberg: Short focal length video color projector employing dichroic mirror block. North American Philips Corporation, Leroy Eason, December 1, 1992: US05168351 (18 worldwide citation)

A video color image projector which includes a block of crossed dichroic mirrors for combining the light rays from image rasters on respective monochrome image display devices and a projection lens for projecting the composite color rays so as to form an enlarged color image on a display screen. Eac ...