Abstract: A light output device and manufacturing method in which an array of LEDs is embedded in an encapsulation layer. An array of cavities (or regions of different refractive index) is formed in the encapsulation layer. The cavities/regions have a density or size that is dependent on their proximity to the light emitting diode locations, in order to reduce hot spots (local high light intensity areas) and thereby render the light output more uniform over the area of the device.

Abstract: A lighting device has an array of light emitting diodes (LEDs), an adhesion layer having portions with photo-activated electrical conductivity over the LEDs, and electrically charged scattering particles adhered by electrostatic attraction to the adhesion layer portions, thereby forming scattering regions that are self-aligned to the light emitting diodes. A method for manufacturing the lighting device includes photo-activating the adhesion layer using light output from the light emitting diodes to locally vary the conductivity of the adhesion layer; and attaching electrically charged scattering particles to the adhesion layer by electrostatic attraction.

Abstract: A light output device and manufacturing method in which an array of LEDs is embedded in an encapsulation layer. An array of cavities (or regions of different refractive index) is formed in the encapsulation layer. The cavities/regions have a density or size that is dependent on their proximity to the light emitting diode locations, in order to reduce hot spots (local high light intensity areas) and thereby render the light output more uniform over the area of the device.

Abstract: A light output device and manufacturing method in which an array of LEDs (34) is embedded in an encapsulation layer (32). An array of cavities (30) (or regions of different refractive index) is formed in the encapsulation layer (32). The cavities/regions (30) have a density or size that is dependent on their proximity to the light emitting diode (34) locations, in order to reduce hot spots (local high light intensity areas) and thereby render the light output more uniform over the area of the device.

Abstract: The present invention relates to a light-emitting device (11) comprising a hollow retro reflector (15) having a reflective internal surface comprising at least three surface segments (17a-c) connected at an apex (18); and a solid state light-source (16a-c) attached to said internal surface of the hollow retro reflector and arranged to emit light towards said apex of the hollow retro refector. Various embodiments of the present invention provide uniform light-output from a relatively simple and cheap light-emitting device.

Abstract: A light output device has scattering regions fabricated on an LED array using a self-aligned process, during which the light of each LED (10) is used to control the deposition process of scattering particles (22) on a photo-sensitive layer (20).

Abstract: A light output device and manufacturing method in which an array of LEDs (34) is embedded in an encapsulation layer (32). An array of cavities (30) (or regions of different refractive index) is formed in the encapsulation layer (32). The cavities/regions (30) have a density or size that is dependent on their proximity to the light emitting diode (34) locations, in order to reduce hot spots (local high light intensity areas) and thereby render the light output more uniform over the area of the device.

Abstract: A device having touch sensor input functionality, comprises first and second control electrodes (40,42) lying in a common plane. The device is operable in at least two modes, comprising: a first mode in which the light transmission characteristics are altered by controlling the movement of the charged particles under the influence of control signals applied to the first and second control electrodes; and a second mode in which the first and second control electrodes are coupled to a capacitance sensing means, for detecting a change in capacitance caused by the proximity of an object to be detected.

Abstract: The invention relates to an electrophoretic color display panel, the display panel comprising at least one pixel (10, 12), the at least one pixel (10, 12) comprising a layer cavity (18ab) containing a suspension with a first set of charged particles (24a) having a first optical property and a second set of charged particles (24b) having a second optical property, and a pair of control electrodes (20a, 20b) arranged adjacent to the layer cavity (18ab), such that charged particles (24a, 24b) are essentially in-plane displaceable in an in-plane direction within the layer cavity (18ab) upon application of a control voltage over the electrode pair, wherein the in-plane distribution of charged particles (24a, 24b) having first and second optical properties in the layer cavity (18ab) depends on at least one of a differing control property additional to any polarity difference of the charged particles (24a, 24b) for each set of charged particles, or at least one additional electrode arranged adjacent to the layer cav

Abstract: Display units (1) comprising pixels arranged in rows and columns coupled via transistors (12) to row (41, 45, 49) and column (31, 32, 39) electrodes show a relatively large gradient in the image. By introducing means (30, 40) for reducing a voltage difference resulting from a voltage jump on a predefined line, which voltage jump arrives via a capacitance (13, 14), this gradient is reduced. The capacitance (13, 14) may comprise a storage capacitor (13), with the predefined line being a storage line (25). The capacitance (13, 14) may also comprise a parasitic capacitor (14) of the transistor (12), with the predefined line corresponding with the row electrode (41, 45, 49) in the same row. The means (30, 40) comprise line driving circuitry (40) and data driving circuitry (30) for supplying a data signal to pixels (11). The means (30, 40) may also comprise line driving circuitry (40) for driving at a reduced amplitude and may comprise storage line driving circuitry for driving the storage line (25).