LED tube lamp
An LED filament comprises at least one LED section, a conductive section, two conductive electrodes and a light conversion layer. The conductive section is used to electrically connect two adjacent LED sections. The two conductive electrodes are electrically connected to each of the LED sections. Each of the LED sections includes at least two LED chips electrically connected to each other. The light conversion layer covers the LED sections, the conductive sections and the conductive electrodes, and a part of the two electrodes is exposed respectively. Since the LED filament includes the LED section and the conductive section, when the LED filament is bent, the stress is easily concentrated on the conductive section. Therefore, the breakage probability of the conductive wires connected within the LED section is reduced during bending. The quality of the LED filament and its application is improved.
1 . An LED lamp comprising:
a lamp tube;
two end caps disposed at two ends of the lamp tube respectively;
a light strip disposed in the lamp tube;
a power module electrically connected to the light strip, comprising:
a driving circuit, configured to be connected to an external power source, and configured to generate a driving signal;
an auxiliary power module, connected to the external power source through a switch, configured to generate an auxiliary power signal when the external power signal is in an abnormal condition or no longer provided, comprising:
an auxiliary power source, configured to store electrical energy;
a discharging circuit, electrically connected to the auxiliary power source, and configured to generate the auxiliary power signal;
a power-supply detection circuit, one terminal electrically connected to the external power source and the other terminal connected to the external power source through the switch, and configured to generate a power-supply detection signal according to a status of the external power signal and a status of the switch;
a central processing unit, electrically connected to the power-supply detection circuit, driving circuit, and discharging circuit, and configured to enable or disable the driving circuit and discharging circuit according to the power-supply detection signal; and
an LED module, comprising an LED and electrically connected to the power module, and configured to receive the driving signal or the auxiliary power signal in order to emit light.
2 . The LED lamp of claim 1 , wherein the power module comprises:
at least three conductive pins, including a first pin electrically connected to a Live wire for receiving AC line power from the external power source, a second pin electrically connected to a Neutral wire for receiving AC line power from the external power source, and a third pin electrically connected through a switch to the Live wire for receiving AC line power from the external power source;
a rectifying circuit, electrically connected to the first pin and second pin, and configured to receive and convert an external power signal into a DC signal to produce a rectified signal;
a filtering circuit, electrically connected to the rectifying circuit, the driving circuit, the auxiliary power module, and configured to receive and filter the rectified signal to produce a filtered signal, which is transmitted to both the driving circuit and the auxiliary power module, and the driving circuit further perform power conversion.
3 . The LED lamp of claim 2 , wherein the auxiliary power module electrically connected the third pin, further comprises:
a charging circuit, electrically connected to the auxiliary power source, and configured to electrically charge the auxiliary power source;
the power-supply detection circuit, electrically connected to the first pin, second pin, and third pin.
4 . The LED lamp of claim 3 , when a peak value of the external power signal is lower than a threshold value, the LED module is configured to receive the auxiliary power signal in order to emit light.
5 . The LED lamp of claim 3 , when a peak value of the external power signal is larger than or equal to a threshold value, and the switch is in a closed state, the LED module is configured to receive the driving signal in order to emit light.
6 . The LED lamp of claim 3 , when a peak value of the external power signal is larger than or equal to a threshold value, and the switch is in a cutoff state, the LED module is configured not to emit light.
7 . The LED lamp of claim 3 , wherein the auxiliary power module further includes a driving control circuit, electrically connected to the driving circuit, and configured to enable the driving circuit according to a high voltage level, and to disable the driving circuit according to a low voltage level.
8 . The LED lamp of claim 3 , wherein the auxiliary power source comprises a chargeable battery or capacitor.
9 . The LED lamp of claim 8 , wherein the auxiliary power source comprises a lithium-ion battery.
10 . The LED lamp of claim 3 , wherein the charging circuit comprises a Buck-type power conversion circuit.
11 . The LED lamp of claim 3 , wherein the discharging circuit comprises a Boost-type power conversion circuit.
12 . The LED lamp of claim 3 , wherein the auxiliary power module further includes:
a power switching circuit, electrically connected to the driving circuit, discharging circuit, LED module, and central processing unit, and configured to switch between operation states according to a control signal of the central processing unit, in order to choose the driving circuit or the discharging circuit for providing power for the LED module.
13 . The LED lamp of claim 12 , wherein the power switching circuit comprises a Double-Pole relay, a common terminal thereof electrically connected to the LED module.
14 . The LED lamp of claim 12 , wherein the power switching circuit comprises a Double-Pole relay, a common terminal thereof electrically connected to the driving circuit.
15 . The LED lamp of claim 2 , wherein the driving circuit comprises a constant-current power conversion circuit.
16 . The LED lamp of claim 2 , wherein the rectifying circuit comprises a full-wave bridge rectifying circuit.
17 . The LED lamp of claim 2 , wherein the filtering circuit comprises a capacitor.
18 . The LED lamp of claim 2 , wherein the filtering circuit comprises a π-shape filtering circuit.
19 . The LED lamp of claim 2 , wherein the LED module comprises at least two LED units, each of which including at least one LED.
20 . The LED lamp of claim 19 , wherein the LED units are designed to respectively have different colors or color temperatures.
21 . The LED lamp of claim 19 , wherein the LED module further comprises a switching circuit electrically connected to the LED units and configured to electrically connect one or more of the LED units to a power loop.
22 . The LED lamp of claim 21 , wherein the switching circuit comprises a switch which is a Double-pole Three-section toggle switch.
23 . The LED lamp of claim 2 , wherein the driving signal and the auxiliary power signal are both constant-current signals and the driving signal is larger than the auxiliary power signal.
24 . The LED lamp of claim 2 , wherein a luminance of lighting of the LED module receiving the auxiliary power signal is smaller than that of lighting when receiving the driving signal.
25 . The LED lamp of claim 1 , wherein the end caps include a first end cap and a second end cap; the first end cap has a first connection structure disposed thereon; the second end cap has a second connection structure disposed thereon; and the first connection structure and the second connection structure are structurally different.
26 . The LED lamp of claim 25 , wherein the LED tube lamp further comprises a fixing unit, wherein the second end cap is connected to the fixing unit through the second connection structure, and the fixing unit has a third connection structure disposed thereon, which third connection structure is configured to be connected to a lamp base.
27 . The LED lamp of claim 26 , wherein the feature that the fixing unit includes a first structural part and a second structural part, wherein the first structural part is connected to the second end cap, the first structural part has the third connection structure disposed thereon, and the second structural part has a baffle disposed thereon.
28 . The LED lamp of claim 1 , wherein the power module includes a first circuit board and a second circuit board, wherein the first circuit board is electrically connected to the second circuit board; electronic components are disposed respectively on the first circuit board and the second circuit board; the first circuit board and second circuit board are each disposed as being extended along a longitudinal direction of the lamp tube; and there is at least partial overlap between projections respectively of the first circuit board and second circuit board along a radial direction crossing the lamp tube.