A lighting apparatus includes a first flexible filament with a first elongated flexible substrate. The first elongated flexible substrate is mounted with a first set of LED modules. The first set of LED modules includes LED modules of multiple colors. The second flexible filament with a second elongated flexible substrate. The second elongated flexible substrate is mounted with a second set of LED modules. The second set of LED modules include LED modules of multiple color temperatures.

An LED lighting system is disclosed. The example LED lighting system includes a first LED circuit and a second LED circuit. The second LED circuit is configured to emit a different color light compared to the first LED circuit. The LED lighting system also includes a switch capable of at least one of switching a voltage level input to at least one of the first LED circuit or the second LED circuit, or switching the second LED circuit ‘on’ or ‘off’. The LED lighting system further includes an LED driver connected to an AC voltage power source. The LED driver is configured to provide a DC voltage output to at least one of the first LED circuit or the second LED circuit. The switch is electrically connected between the DC voltage output and at least one of the first LED circuit or the second LED circuit.

An LED lighting system is disclosed. The example LED lighting system includes a first LED circuit and a second LED circuit. The second LED circuit is configured to emit a different color light compared to the first LED circuit. The LED lighting system also includes a switch capable of at least one of switching a voltage level input to at least one of the first LED circuit or the second LED circuit, or switching the second LED circuit ‘on’ or ‘off’. The LED lighting system further includes an LED driver connected to an AC voltage power source. The LED driver is configured to provide a DC voltage output to at least one of the first LED circuit or the second LED circuit. The switch is electrically connected between the DC voltage output and at least one of the first LED circuit or the second LED circuit.

A LED light bulb includes a bulb envelope, a stem, at least two conductors, at least one LED light emitting module, and fluid. The bulb envelope has an opening, and a material of the bulb envelope includes soda-lime glass. The stem is connected to the bulb envelope and seals the opening. Here, the stem has a supporting portion and a pipe, the supporting portion is located in the bulb envelope, and the pipe has an open end inside the bulb envelope and a sealed end outside the bulb envelope. The conductors are located through the stem. The LED light emitting module is assembled to the supporting portion and coupled to the conductors. The fluid fills the bulb envelope. The bulb envelope made of soda-lime glass enhances visual effects produced by the shape, color and light reflection of the LED light bulb.

A LED light bulb includes a bulb envelope, a stem, at least two conductors, at least one LED light emitting module, and fluid. The bulb envelope has an opening, and a material of the bulb envelope includes soda-lime glass. The stem is connected to the bulb envelope and seals the opening. Here, the stem has a supporting portion and a pipe, the supporting portion is located in the bulb envelope, and the pipe has an open end inside the bulb envelope and a sealed end outside the bulb envelope. The conductors are located through the stem. The LED light emitting module is assembled to the supporting portion and coupled to the conductors. The fluid fills the bulb envelope. The bulb envelope made of soda-lime glass enhances visual effects produced by the shape, color and light reflection of the LED light bulb.

A display device includes: a substrate; a display element layer on one surface of the substrate and including at least one light emitting element emitting light; and a pixel circuit portion on the display element layer and including at least one transistor electrically connected to the light emitting element, wherein the display element layer includes: a first electrode on the substrate and electrically connected to one end of the light emitting element; a second electrode on the substrate and electrically connected to the other end of the light emitting element; and an insulation layer on the substrate including the second electrode, and having a first opening exposing a portion of the second electrode, and wherein the second electrode is electrically connected to the transistor through the first opening.

A display device includes: a substrate; a display element layer on one surface of the substrate and including at least one light emitting element emitting light; and a pixel circuit portion on the display element layer and including at least one transistor electrically connected to the light emitting element, wherein the display element layer includes: a first electrode on the substrate and electrically connected to one end of the light emitting element; a second electrode on the substrate and electrically connected to the other end of the light emitting element; and an insulation layer on the substrate including the second electrode, and having a first opening exposing a portion of the second electrode, and wherein the second electrode is electrically connected to the transistor through the first opening.

A parallel circuit for light emitting diodes includes a first power wire, a second power wire, a first light emitting diode, a second light emitting diode, and a second impedance element. The first LED includes a first turn-on voltage, and two ends of the first LED are respectively connected to the first power wire and the second power wire. The second LED includes a second turn-on voltage, and the first turn-on voltage is different from the second turn-on voltage. The second impedance element and the second LED are connected to form a second series circuit. One end of the second series circuit is electrically connected to the first power wire, while the other end of the second series circuit is electrically connected to the second power wire. In the parallel circuit, different LEDs are respectively driven by different voltages to emit light with pre-determined brightness.

Various embodiments include apparatuses and methods enabling a dim-to-warm circuit operation of an LED multi-colored array. In one example, an apparatus includes a hybrid driving-circuit coupled to the LED array and to a single control-device to receive an indication of a luminous flux desired from the LED array. A color temperature for the LED array is determined based on the desired luminous flux of the LED array. In various embodiments, the hybrid driving-circuit includes an analog current-division circuit to produce current for at least two LED current-driving sources and a multiplexer array coupled between the analog current-division circuit and the LED to provide periodically, for a predetermined amount of time, current from at least one of the at least two LED current-driving sources to at least two colors of the LED array. Other apparatuses and methods are described.

Various embodiments include apparatuses and methods enabling a dim-to-warm circuit operation of an LED multi-colored array. In one example, an apparatus includes a hybrid driving-circuit coupled to the LED array and to a single control-device to receive an indication of a luminous flux desired from the LED array. A color temperature for the LED array is determined based on the desired luminous flux of the LED array. In various embodiments, the hybrid driving-circuit includes an analog current-division circuit to produce current for at least two LED current-driving sources and a multiplexer array coupled between the analog current-division circuit and the LED to provide periodically, for a predetermined amount of time, current from at least one of the at least two LED current-driving sources to at least two colors of the LED array. Other apparatuses and methods are described.