Agilent Technologies, Inc.

Boon Chun Tan

Kheng Leng Tan

Su Lin Oon

Bee Yin Janet Chua

Justin Lim Hwa Aik

Abdul Karim Aizar

The present invention provides a method and system for selectively depositing light emitting film on a light emitting base layer, such as phosphors in a silicon gel carrier on a light emitting diode (LED). The combination of light emitting film and light emitting base layer are selected to give the desired light color, such as white light. The screen printing method comprises applying a photoresist layer to a base layer, masking the photoresist layer, irradiating the photoresist layer through the mask to make a soluble portion and insoluble portion, dissolving the soluble portion to reveal the base layer, and applying a light emitting film to the base layer where the soluble portion was removed. The base layer is then sawn to form LED chips or LED lamps.

Screen printing process for light emitting base layer

A compound display for presenting images to a viewer is disclosed. The compound display includes first and second displays positioned such that the first display is viewable through the second display when the second display is not generating an image. The first display displays a first image. The second display includes an OLED having a first state in which the OLED generates light of a first intensity and a second state in which the OLED does not generate light. The OLED is transparent to light from the first display when the OLED is not generating light. The second display is positioned between the first display and the viewer. In one embodiment, the first display includes an array of inorganic LEDs that generate light of a greater intensity than that generated by said OLED in said first state.

Compound display

A LED that includes a light emitter that emits light of a first wavelength and a phosphor layer that converts a portion of that light to light of a second wavelength is disclosed. The phosphor layer includes a powdered phosphor suspended in a photo-curable medium that sets upon exposure to light of a curing wavelength. The phosphor layer can also include a thixotropic agent that reduces the rate at which the powdered phosphor settles in the medium prior to the medium being exposed to light of the curing wavelength. The photo-curable medium preferably includes a photo-curable epoxy that cures in a time that is short compared to the settling time of the phosphor powder in the medium.

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Penang, Malaysia

Boon Chun Tan