Avago Technologies Ecbu IP (Singapore) Pte. Ltd.

Avago Technologies General IP (Singapore) Pte. Ltd.

Chi Boon Ong

Yufeng Yao

Wee Sin Tan

Chee Heng Wong

Sze Ping Ong

Rani Ramamoorthy Saravanan

Dengpeng Chen

A package-on-package proximity sensor module including a infrared transmitter package and a infrared receiver package is presented. The proximity sensor module may include a fully-assembled infrared transmitter package and a fully-assembled infrared receiver package disposed on a quad flat pack no-lead (QFN) lead frame molded with an IR cut compound housing. A bottom surface of the QFN lead frame may be etched and covered with the IR cut compound to provide a locking feature between the QFN lead frame and the IR cut compound housing.

Package-on-package proximity sensor module

Various embodiments of a compact optical proximity sensor with a ball grid array and windowed or apertured substrate are disclosed. In one embodiment, the optical proximity sensor comprises a printed circuit board ('PCB') substrate comprising an aperture and a lower surface having electrical contacts disposed thereon, an infrared light emitter and an infrared light detector mounted on an upper surface of the substrate, an integrated circuit located at least partially within the aperture, a molding compound being disposed between portions of the integrated circuit and substrate, an ambient light detector mounted on an upper surface of the integrated circuit, first and second molded infrared light pass components disposed over and covering the infrared light emitter and the infrared light detector, respectively, and a molded infrared light cut component disposed between and over portions of the first and second infrared light pass components.

Compact optical proximity sensor with ball grid array and windowed substrate

A lens element comprising a base, a plurality of lens sections and a top lens section is disclosed. The plurality of lens sections are formed above a planar parallel to the base with each of the lens sections being positioned rotationally symmetric about an optical axis. The lens sections define a dome shape with every adjoining lens sections being conjugated with each other. A top lens section is formed at the center above the other lens sections and conjugated therewith. All of the lens sections are conjugated with each of its neighboring lens sections. Each of the lens sections has a optical property to direct light towards a target point. The target point may be positioned along the optical axis.

Lens having multiple conic sections for LEDs and proximity sensors

In an embodiment, the invention provides a proximity sensor including a transmitter die, a receiver die, an ASIC die, a lead frame, wire bonds, a first transparent encapsulant, a second transparent encapsulant, and an opaque encapsulant. The transmitter die, the receiver die and the ASIC die are attached to portions of the lead frame. Wire bonds electrically connect the transmitter die, the receiver die, the ASIC die, and the lead frame. The first transparent encapsulant covers the receiver die, the ASIC die, the wire bonds, and a portion of the lead frame. The second transparent encapsulant covers the transmitter die, the wire bonds, and a portion of the lead frame. The opaque encapsulant covers portions of the first and second encapsulants and a portion of the lead frame.

Small low-profile optical proximity sensor

Various embodiments of a miniaturized optical proximity sensor are disclosed. In one embodiment, an ambient light sensor and a light detector are mounted on first and second spacers, which in turn are mounted to a top surface of an integrated circuit die-attached to a substrate. An optically-transmissive infrared pass compound is molded over the ambient light sensor, the light detector, the integrated circuit, a light emitter and peripheral portions of the substrate. Next, an optically non-transmissive infrared cut compound is molded over the optically-transmissive infrared pass compound to provide a miniaturized optical proximity sensor having no metal shield but exhibiting very low crosstalk characteristics.

Miniaturized optical proximity sensor

Various embodiments of an optical sensor comprising a novel shield that may be quickly and accurately aligned and positioned with respect to an underlying light emitting and light detecting assembly are disclosed. Also disclosed are novel lens arrangements for efficiently collimating light emitted and received by the optical proximity sensor, and for reducing crosstalk.

Optical proximity sensor with improved shield and lenses

Various embodiments of a package-on-package optical sensor comprising three distinct different packages are disclosed. The three different packages are combined to form the optical proximity sensor, where the first package is a light emitter package, the second package is a light detector package, and the third package is an integrated circuit package. First and second infrared light pass components are molded or casted atop the light emitter package and the light detector package after they have been mounted atop the integrated circuit package. An infrared light cut component is then molded or casted between and over portions of the light emitter package and the light detector package.

Package-on-package (POP) optical proximity sensor

Disclosed are various embodiments of a light guide and corresponding ambient light sensor, computing device and backlit display for use in a portable electronic device. The various embodiments of the light guide are configured to permit ambient light to be collected efficiently and accurately over wide angles of incidence, even under low-ambient-light conditions. The efficient and accurate collection of ambient light by the various embodiments of the light guide disclosed herein may be employed to more accurately control the amount and degree of backlighting provided to a backlit display, which in turn can be used to conserve valuable battery power in a portable electronic device.

Light guide for ambient light sensor in a portable electronic device

A sensor for measuring the properties of light from a light source is disclosed. The sensor includes first and second photodetectors that are illuminated by the light. The first and second photodetectors generate first and second photodetector signals indicative of the first and second weighted averages of the intensity of light in a wavelength band between 400 nm and 700 nm. The first photodiode is more sensitive to light having wavelengths between 400 nm and 500 nm than the second photodetector. The sensor also includes a color temperature processing circuit that generates a first processed signal that is related to a ratio of the first and second signals. The color temperature processing circuit could include first and second logarithmic amplifiers that generate first and second logarithmic signals, respectively, from the first and second photodetector signals and a subtraction circuit that forms a signal indicative of the difference between the first and second logarithmic signals.

Growing community of inventors

Singapore, Singapore

Chi Boon Ong