Abstract: 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.

Abstract: 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.

Abstract: A mould for encapsulating an integrated circuit package on a leadframe including a top mould-half and a complementary bottom mould-half enclosing a cavity for encapsulating said package wherein structures are provided on at least one of said mould-halves which, upon the closure of said mould-halves, closes off the spaces between adjacent leads of the leadframe to allow only said leads to extend out of said cavity. The structures may be protrusions from the mould half closing off the spaces. Notches or slots cut to allow the leads' extension are the preferred structures due to ease of machining. The mould design thus enables a leadframe package to be moulded with a peripheral flange as narrow as desired without the need to cut a broad conventional flange formed up to the dam bar because only the leads and tie bars are left to be singulated. A method for making the above mould as well as singulation methods for cutting and punching the leads and tie bars is also disclosed.

Abstract: A leadframe strip production process provides encapsulated semiconductor chips with more than two annular rows of exposed leads by utilizing two types of frames, a leadframe to which IC devices are mounted, and a ring frame strip that is attached to the leadframe with a non-conductive adhesive. The leadframe includes die pads that receive the IC chip devices, and each die pad is positioned within multiple rows of connecting pads for connection with bonding pads of the device to be encapsulated. The connecting pads of the leadframe are arranged in an annular fashion, with inner rows being closer to the die pad and outer rows being farther from the die pad.

Abstract: In one embodiment, a scalable controller for a computer input area is provided with: a plurality of drive signal pads; a plurality of signal detection pads; a programmable memory to store an indication of active ones of the drive signal pads and signal detection pads; and control circuitry to identify user input with the computer input area by 1) driving active ones of the drive signal pads, and 2) reading active ones of the signal detection pads.

Abstract: A system is disclosed for providing input to a computer, the system comprising an optical input area; a controller device; a diagnostic mode for assigning a status of faulty pathway to interrupted pathways; and a normal function mode for excluding interrupted pathways and determining a pair of minimum and maximum coordinates formed at intersections of a first pair and a second pair of outermost interrupted pathways. A method for providing input to a computer is disclosed, the method comprising providing an optical input area and a controller; selecting the diagnostic mode; assigning a status of faulty pathway to interrupted pathways; selecting the normal function mode; excluding interrupted pathways; determining a pair of minimum and maximum coordinates formed at intersections of a first pair of outermost interrupted pathways and a second pair of outermost interrupted pathways; and reporting the pair of minimum and maximum coordinates to the computer.

Abstract: Disclosed is a method for identifying a number of interactions with a computer input area defined by at least first and second intersecting sets of detection paths. First, indications of which of the detection paths are affected by the interactions are received. Then, for each of the detection path sets, the set's indications of affected detection paths are parsed to identify up to N extents of adjacent, affected detection paths (N?2). A controller having logic to implement the method, and a system incorporating a control system that implements the method, are also disclosed.

Abstract: In one embodiment, a touch detection system and method is achieved having high resolution by forming an integrated array of alternating emitters and detectors. Using integration techniques, the detectors can be made much larger than the emitters while the gaps between the emitters and detectors are maintained relatively small. Thus, high resolution is achieved without dramatically increasing the number of emitter/detector pairs. In one embodiment each array is positioned on an edge of a display such that the emitter of one array is lined up (on axis with) a detector of an opposing display. In one embodiment, the touch detection system and method operates to detect the amplitude of signals arriving from opposing arrays so as to precisely determine the location of a touched position. Off-axis scanning can be employed to increase sensitivity.