A chip-on-board type photoelectric device exemplarily includes: a package substrate, provided with a chip mounting region, a first electrode and a second electrode, the first and second electrodes being arranged spaced from each other at a periphery of the chip mounting region; first photoelectric chips, arranged in the chip mounting region to form inwardly concave strip-shaped patterns as mutually spaced first color temperature regions, and electrically connected between the first and second electrodes to form at least one first photoelectric chip string; and second photoelectric chips, arranged in the chip mounting region to form second color temperature regions. A light-emitting color temperature of each the second color temperature region is higher than that of each the first color temperature region. The second photoelectric chips are electrically connected between the first and second electrodes to form second photoelectric chip strings. A good uniformity of light mixing can be achieved.

LED tape is provided that employs a plurality of surface-mounted contact terminals. The LED tape can be severed at discrete locations adjacent to the contact terminal to create a tape segment configured to interconnect to a power source or to another tape segment by way of a wire selectively received and secured within corresponding terminal connectors. The use of the connecting wire omits the need for a mechanical connector or integration by soldering currently required to interconnect LED tape segments.

LED tape is provided that employs a plurality of surface-mounted contact terminals. The LED tape can be severed at discrete locations adjacent to the contact terminal to create a tape segment configured to interconnect to a power source or to another tape segment by way of a wire selectively received and secured within corresponding terminal connectors. The use of the connecting wire omits the need for a mechanical connector or integration by soldering currently required to interconnect LED tape segments.

A method and an illumination system for simulating a CIE standard illuminant with a multi-channel LED are disclosed. The method includes adjusting a brightness of the main light source control channel, the wavelength complementary control channel, the color temperature adjustment control channel to make a mixed chromaticity coordinate meet a chromaticity coordinate of the CIE standard illuminant to be simulated according to chromaticity coordinates. The LED control channels are reduced through group optimization, and a technology which is discarded by multi-channel LED such as a filter is used, a control of a light source substantially reducing number of control channels and enabling a multi-channel LED to simulate a standard illuminant is formed, such that a single chromaticity control rather than a chromaticity control which must be transformed by a spectral conversion is achieved.

A makeup mirror display with multiple cameras and variable color temperature light source includes an adjustable makeup mirror, a makeup mirror display, at least two cameras, and at least one variable color temperature light source. The makeup mirror display is arranged at one end of the adjustable makeup mirror surface and includes at least one control button and a control circuit arranged therein. The at least two cameras are respectively arranged on a left side and a right side of the makeup mirror display and electrically connected with the makeup mirror display. The at least one variable color temperature light source is disposed on one side of the makeup mirror display and electrically connected with the makeup mirror display. Therefore, the user can perform makeup more efficiently and finish a more perfect makeup, so as to enhance the overall practicability and convenience.

A makeup mirror display with multiple cameras and variable color temperature light source includes an adjustable makeup mirror, a makeup mirror display, at least two cameras, and at least one variable color temperature light source. The makeup mirror display is arranged at one end of the adjustable makeup mirror surface and includes at least one control button and a control circuit arranged therein. The at least two cameras are respectively arranged on a left side and a right side of the makeup mirror display and electrically connected with the makeup mirror display. The at least one variable color temperature light source is disposed on one side of the makeup mirror display and electrically connected with the makeup mirror display. Therefore, the user can perform makeup more efficiently and finish a more perfect makeup, so as to enhance the overall practicability and convenience.

A lighting device may include a light source, a plurality of drive circuits, and a control circuit. The light source may include a plurality of emitter circuits that are configured to emit light. The light source may include a first emitter circuit that is configured to emit light at a first color (e.g., color temperature), a second emitter circuit is configured to emit light at a second color (e.g., color temperature), and a third emitter circuit is configured to emit light at a third color (e.g., color temperature). The first, second, and third colors (e.g., color temperatures) may be on a color curve, such as a color temperature curve like the black body locus. The control circuit may be configured to control the amount of power delivered to no more than two emitter circuits to emit light when controlling the light emitted by the light source to the target intensity.

A light emitting device is provided. The light emitting device includes a first light emitter comprising a plurality of light emitting elements configured to emit light in a visible light region, a second light emitter comprising a plurality of light emitting elements configured to emit light in an ultraviolet B (UVB) region, and at least one processor configured to control the first light emitter and the second light emitter so that a sum of an intensity of light emitted from the first light emitter and an intensity of light emitted from the second light emitter is greater than or equal to a threshold illuminance value.

A light emitting device is provided. The light emitting device includes a first light emitter comprising a plurality of light emitting elements configured to emit light in a visible light region, a second light emitter comprising a plurality of light emitting elements configured to emit light in an ultraviolet B (UVB) region, and at least one processor configured to control the first light emitter and the second light emitter so that a sum of an intensity of light emitted from the first light emitter and an intensity of light emitted from the second light emitter is greater than or equal to a threshold illuminance value.

A light emitting diode, LED, filament lamp (100), comprising a light emitting diode light source (110), comprising at least one first filament (120a), arranged to emit light having a first color temperature, at least one second filament (120b), arranged to emit light having a second color temperature, different from the first color temperature, wherein each of the first and second filaments comprises a substrate (130a, 130b) of elongated shape, wherein at least one light emitting diode (140a, 140b) is arranged on the substrate. The LED filament lamp further comprises a control unit (150) configured to control a first intensity of the light emitted from the first filament(s) and to control a second intensity of the light emitted from the second filament(s) according to at least one predetermined setting, in order to control the total color temperature of the light emitted from the LED filament lamp as a function of the predetermined setting(s).