An LED tube lamp comprises a glass lamp tube having a main body, two end caps coupled to a respective end of the tube, an LED light strip adhered to inner circumferential surface of the tube by first adhesive, a plurality of LED light sources mounted on a mounting region, a power supply module having a circuit board and a plurality of electronic components mounted on the circuit board, a diffusion layer covering on outer surface or inner surface of the tube, and a protective layer being disposed on surface of the strip and having a plurality of first openings for disposing the plurality of LED light sources. The strip comprises the mounting region and connecting region at an end of the strip. The circuit board is substantially parallel with axial direction of the tube, electrically connects to the connecting region, and stacks with a portion of the connecting region.

An LED tube lamp comprises a glass lamp tube having a main body, two end caps coupled to a respective end of the tube, an LED light strip adhered to inner circumferential surface of the tube by first adhesive, a plurality of LED light sources mounted on a mounting region, a power supply module having a circuit board and a plurality of electronic components mounted on the circuit board, a diffusion layer covering on outer surface or inner surface of the tube, and a protective layer being disposed on surface of the strip and having a plurality of first openings for disposing the plurality of LED light sources. The strip comprises the mounting region and connecting region at an end of the strip. The circuit board is substantially parallel with axial direction of the tube, electrically connects to the connecting region, and stacks with a portion of the connecting region.

A brazing apparatus and method for brazing an anode target plate of an X-ray generator are disclosed. The brazing apparatus comprises: a vacuum part for providing, during brazing, a vacuum environment at least for a target plate main body formed of an alloy, a brazing material, and a substrate; an induction brazing part for applying an induction current to the target plate main body, the brazing material and the substrate in the vacuum part so as to achieve heating to a temperature higher than the melting point of the brazing material, causing the substrate to be welded to the target plate main body through melting of the brazing material and a resulting reaction; and a directional energy welding part for applying a generated directional energy beam to a position of lower temperature determined on the target plate main body to perform heating.

A device for inductively soldering at least one ferromagnetic contact element to at least one conductor structure on a nonmetallic plate, includes a system for fastening a plate during the soldering operation, at least one soldering tool having at least one induction loop or induction coil suitable for emitting a magnetic field, a system for mutually positioning the soldering tool and the contact element such that the switched-on magnetic field of the soldering tool reliably heats the ferromagnetic contact element and thus the solder joint, a generator that is suitable for generating an alternating voltage with a frequency of up to 1500 kHz and that can be connected to the induction loop or induction coil.

By a method of determining the state of an iron tip according to the present invention, in a soldering device including: an iron tip that includes a solder hole into which a solder piece is supplied and that heats and melts the solder piece in the solder hole; a gas supply source that supplies a gas; and a gas supply portion that makes the gas supply source communicate with the solder hole and that supplies the gas from the gas supply source into the solder hole, the total flow rate of the gas flowing through the gas supply portion or a supply pressure is constant, a physical quantity of the gas flowing within the gas supply portion is measured and the measured physical quantity is compared with a previously provided reference value or table such that the state of the iron tip is determined. In this way, it is possible to constantly accurately determine the state of the iron tip.

By a method of determining the state of an iron tip according to the present invention, in a soldering device including: an iron tip that includes a solder hole into which a solder piece is supplied and that heats and melts the solder piece in the solder hole; a gas supply source that supplies a gas; and a gas supply portion that makes the gas supply source communicate with the solder hole and that supplies the gas from the gas supply source into the solder hole, the total flow rate of the gas flowing through the gas supply portion or a supply pressure is constant, a physical quantity of the gas flowing within the gas supply portion is measured and the measured physical quantity is compared with a previously provided reference value or table such that the state of the iron tip is determined. In this way, it is possible to constantly accurately determine the state of the iron tip.

A sleeve soldering device has a displacement sensor and a heat flux sensor. The displacement sensor detects a physical quantity related to a pressure from a heated sleeve heated by a heater onto an electric board when the heated sleeve presses the electric board. The displacement sensor detects a physical quantity related to a deformation amount of the electric board due to thermal energy from the heater. The heat flux sensor detects a physical quantity related to a heat transfer amount from the heater to the electric board when the heated sleeve is pressed to the electric board. A control part compares each of detection values obtained from the displacement sensor and the heat flux sensor with a respective judgment reference so as to detect whether each detection value satisfies the respective reference.

Method for joining of at least two unweldable materials, non-weldable directly to each other with thermal joining processes in a lap joint configuration, where a two step sequence is used consisting of a first step to apply a thermomechanical or mechanical surface protection layer on the surface of an unweldable material and a second step, where a thermal joining process is used to joint the sprayed layer with an applied layer sheet.

An LED tube lamp with overvoltage protection capability is provided. The LED tube lamp includes a lamp tube, two external connection terminals, a rectifying circuit, a filtering circuit, an LED module, and a protection circuit. The protection circuit is coupled between two input terminals of the LED module and configured to perform overvoltage protection when determining that a voltage level between the two input terminals of the LED module reaches or is higher than a predefined voltage value, wherein the protection circuit includes a diode and the predefined voltage value is in a range of about 40V to about 600V.

An LED tube lamp with overvoltage protection capability is provided. The LED tube lamp includes a lamp tube, two external connection terminals, a rectifying circuit, a filtering circuit, an LED module, and a protection circuit. The protection circuit is coupled between two input terminals of the LED module and configured to perform overvoltage protection when determining that a voltage level between the two input terminals of the LED module reaches or is higher than a predefined voltage value, wherein the protection circuit includes a diode and the predefined voltage value is in a range of about 40V to about 600V.