Abstract: Alight emitting diode (LED) filament lamp with a variable color temperature includes a lamp cap, a mounting piece connected to the lamp cap, a casing connected to the mounting piece, a stem arranged in the casing, an LED filament arranged on the stem, a dual in-line package (DIP) switch connected to the stem, and a driving power supply connected to the DIP switch. The LED filament includes a substrate, a first pin arranged at one end of the substrate, a second pin arranged at the other end of the substrate. The LED filament is of an integral structure. Through the arrangement of the DIP switch or a control switch, the first pin and the second pin can switch a positive pole or a negative pole of an output terminal of the driving power supply, thereby realizing switching of different color temperatures.

Abstract: A LED driving circuit based on a T-shaped lamp tube including: an input rectifying circuit, a Buck circuit, an IC power supply circuit, a PWM control integrated circuit, a compatible electronic ballast circuit, and an output rectifying and filtering circuit. The present application can realize the compatibility of single-ended input of AC mains, double-ended input of AC mains and double-ended input of an electronic ballast, and is simple in circuit, small in size, high in efficiency and stable in performance.

Abstract: A LED driving circuit based on a T-shaped lamp tube including: an input rectifying circuit, a Buck circuit, an IC power supply circuit, a PWM control integrated circuit, a compatible electronic ballast circuit, and an output rectifying and filtering circuit. The present application can realize the compatibility of single-ended input of AC mains, double-ended input of AC mains and double-ended input of an electronic ballast, and is simple in circuit, small in size, high in efficiency and stable in performance.

Abstract: This invention relates to technical field of LED lighting, disclosing a LED light bulb including a bulb housing, at least two LED light sources provided onto the inner wall of the bulb housing, a lamp holder connected to the bulb housing and a shielding member provided onto the outer wall of the bulb housing. The shielding member matches with the LED light source in shape and position. The LED light sources located at the inner wall of the bulb housing are equidistant. The LED light source includes a substrate and a LED component provided on the substrate. The substrate matches with the bulb housing in shape. In the provided LED light bulb, the shielding member is disposed onto the outer wall of the bulb, having positions match with the LED light source with equal intervals. The LED light bulb may achieve the full-circumference lighting and more even light emission.