An LED display lighting device is disclosed. The LED display lighting device includes: a substrate including a substrate base and a first electrode part and a second electrode part, both of which are disposed on the substrate base; a plurality of LED chips arranged in a matrix on the substrate; and a diffusion plate covering the upper portions of the LED chips. Each of the LED chips includes: a light-transmitting base; n LED cells disposed under the light-transmitting base and each including a first conductive semiconductor layer, an active layer, and a second conductive semiconductor layer; an interconnection through which the n LED cells are connected in series; a first electrode structure through which the first conductive semiconductor layer of the first LED cell is connected to the first electrode part; and a second electrode structure through which the second conductive semiconductor layer of the n-th LED cell is connected to the second electrode part. The sum of the areas of the active layers of the n LED cells is at least 50% of the area of the light-transmitting base.

Systems and methods for illuminating and/or inspecting one or more features of a unit under test (UUT) are disclosed herein. A system configured in accordance with embodiments of the present technology can include, for example, a machine, one or more diffuser elements, and/or one or more light sources. The system can create and adjust brightfield illumination profiles (e.g., uniform, brightfield illumination profiles) on portions (e.g., on curved features) of the UUT by, for example, using the one or more light sources and/or the one or more diffuser elements to adjust diffuse and/or specular illumination projected onto the curved features of the UUT. In some embodiments, the system includes one or more darkfield light sources configured to project illumination onto second portions of the UUT to create a darkfield illumination profile. The system can capture data of the brightfield and/or darkfield illumination profiles and can thereby inspect portions of the UUT.

Systems and methods for illuminating and/or inspecting one or more features of a unit under test (UUT) are disclosed herein. A system configured in accordance with embodiments of the present technology can include, for example, a machine, one or more diffuser elements, and/or one or more light sources. The system can create and adjust brightfield illumination profiles (e.g., uniform, brightfield illumination profiles) on portions (e.g., on curved features) of the UUT by, for example, using the one or more light sources and/or the one or more diffuser elements to adjust diffuse and/or specular illumination projected onto the curved features of the UUT. In some embodiments, the system includes one or more darkfield light sources configured to project illumination onto second portions of the UUT to create a darkfield illumination profile. The system can capture data of the brightfield and/or darkfield illumination profiles and can thereby inspect portions of the UUT.

A light source device according to an embodiment of the present technology includes: a first light source unit; a polarization split element; a second light source unit; a light synthesis unit; a polarization synthesis element. The first light source unit emits light having a predetermined wavelength band and in an unpolarized state. The polarization split element splits emitted light emitted from the first light source unit into first split light in a first polarization state and second split light in a second polarization state. The second light source unit emits one or more laser beams each having a wavelength band included in the predetermined wavelength band. The light synthesis unit synthesizes the first split light and the one or more laser beams and emits the obtained light as synthesized light in the first polarization state. The polarization synthesis element synthesizes the synthesized light and the second split light.

Disclosed herein are methods for controlling a light fixture with a subtractive color mixing system for emitting light having a target color. The methods may comprise receiving target information indicative of, such as defining, the target color. The methods may further comprise calculating a target control setpoint for each of a the plurality of subtractive color filters based on: the target information; and calibration data, which for a plurality of sets of calibration control setpoints is indicative of an emitted color. The methods may further comprise controlling each of the subtractive color filters according to each calculated target control setpoint for each of the subtractive color filters.)

Disclosed herein are methods for controlling a light fixture with a subtractive color mixing system for emitting light having a target color. The methods may comprise receiving target information indicative of, such as defining, the target color. The methods may further comprise calculating a target control setpoint for each of a the plurality of subtractive color filters based on: the target information; and calibration data, which for a plurality of sets of calibration control setpoints is indicative of an emitted color. The methods may further comprise controlling each of the subtractive color filters according to each calculated target control setpoint for each of the subtractive color filters.

A light source includes features configured to compensate for discontinuous solid state sources. The light source can produce a wide color gamut in display, and improved color rendering of tissue under observation by phosphor gap filling with colored LEDs. The light source can include provisions to depart from a white light spectrum to heighten differences in anatomical features or functions. The light source can include provisions to introduce narrow-band solid-state sources for producing false-color and pseudo-color images, with variable color rendering to change the power spectral distribution and to compensate for fiber optic length and fiber optic diameter tip sensing.

A light source includes features configured to compensate for discontinuous solid state sources. The light source can produce a wide color gamut in display, and improved color rendering of tissue under observation by phosphor gap filling with colored LEDs. The light source can include provisions to depart from a white light spectrum to heighten differences in anatomical features or functions. The light source can include provisions to introduce narrow-band solid-state sources for producing false-color and pseudo-color images, with variable color rendering to change the power spectral distribution and to compensate for fiber optic length and fiber optic diameter tip sensing.

The invention relates to a directional lighting device (10) which comprises: a light emission source (30); a cover (40) covering the light emission source (30), and provided with an inner wall (41) and an outer wall (42) which delimit an inter-wall space (44), and filled with a fluid, the cover (40) comprising transmission zones (45), each formed of an inner zone (45a) and an outer zone (45b), facing one another, and at which an electric field is capable of being applied to the functional fluid by means of a first electrode (46a) and a second electrode (46b), the functional fluid being adapted to, under the effect of an electric field sensed at a given transmission zone, form with the latter a window transparent to the luminous radiation, and be either opaque or reflective and/or diffusive to said radiation in the remainder of the inter-wall volume (43).

The invention relates to a directional lighting device (10) which comprises: a light emission source (30); a cover (40) covering the light emission source (30), and provided with an inner wall (41) and an outer wall (42) which delimit an inter-wall space (44), and filled with a fluid, the cover (40) comprising transmission zones (45), each formed of an inner zone (45a) and an outer zone (45b), facing one another, and at which an electric field is capable of being applied to the functional fluid by means of a first electrode (46a) and a second electrode (46b), the functional fluid being adapted to, under the effect of an electric field sensed at a given transmission zone, form with the latter a window transparent to the luminous radiation, and be either opaque or reflective and/or diffusive to said radiation in the remainder of the inter-wall volume (43).