Auto-darkening welding helmet
An auto-darkening welding helmet comprises a helmet casing; an auto-darkening filter installed in the helmet casing; and a lighting device installed in the helmet casing, wherein the auto-darkening filter includes a liquid crystal panel which is switchable between a non-opaque state and an opaque state, wherein the lighting device comprises a cable connectable to the auto-darkening filter such that when the liquid crystal panel is in the non-opaque state the lighting device automatically emits light towards a front of the liquid crystal panel and when the liquid crystal panel is in the opaque state the lighting device does not automatically emit light.
1. An auto-darkening welding helmet, comprising:
a helmet casing;
an auto-darkening filter installed in the helmet casing and including a liquid crystal panel configured to be switched between a non-opaque state and an opaque state; and
a lighting device releasably installed in the helmet casing above or laterally aside the auto-darkening filter, the lighting device comprising a cable configured to be connected to the auto-darkening filter in a manner that:
when the liquid crystal panel is in the non-opaque state, the lighting device automatically emits light towards a front of the liquid crystal panel, and
when the liquid crystal panel is in the opaque state, the lighting device does not automatically emit light.
2. The auto-darkening welding helmet of claim 1 , wherein the lighting device comprises an LED lamp configured to emit light.
3. The auto-darkening welding helmet of claim 2 , wherein the lighting device includes a button configured to control the LED lamp to be powered on or off.
4. The auto-darkening welding helmet of claim 3 , wherein the auto-darkening filter comprises a control circuit configured to control the LED lamp to emit light based on the LED lamp being powered on.
5. The auto-darkening welding helmet of claim 4 , wherein the lighting device comprises a battery to power the LED lamp.
6. The auto-darkening welding helmet of claim 4 , wherein the lighting device comprises a battery configured to power the lighting device and the auto-darkening filter.
7. The auto-darkening welding helmet of claim 4 , wherein:
the auto-darkening filter comprises an optical sensor configured to receive an arc-light signal;
based on the optical sensor receiving the arc-light signal, the control circuit is configured to determine the liquid crystal panel is in the opaque state and control the LED lamp to not emit light; and
based on the optical sensor not receiving the arc-light signal, the control circuit is configured to determine the liquid crystal panel is in the non-opaque state and control the LED lamp to emit light.
8. The auto-darkening welding helmet of claim 7 , wherein the button is configured to control the LED lamp independently of the control circuit.
9. The auto-darkening welding helmet of claim 2 , wherein the auto-darkening filter comprises a control circuit configured to control the LED lamp to emit light based on the LED lamp being powered on.
10. The auto-darkening welding helmet of claim 9 , wherein the lighting device comprises a battery to power the LED lamp.
11. The auto-darkening welding helmet as recited in claim 9 , wherein the lighting device comprises a battery configured to power the lighting device and the auto-darkening filter.
12. The auto-darkening welding helmet of claim 9 , wherein:
the auto-darkening filter comprises an optical sensor configured to receive an arc-light signal;
based on the optical sensor receiving the arc-light signal, the control circuit is configured to determine the liquid crystal panel is in the opaque state and control the LED lamp to not emit light; and
based on the optical sensor not receiving the arc-light signal, the control circuit is configured to determine the liquid crystal panel is in the non-opaque state and control the LED lamp to emit light.
13. The auto-darkening welding helmet of claim 12 , wherein the lighting device includes a button configured to control the LED lamp to be powered on or off.
14. The auto-darkening welding helmet of claim 12 , wherein the lighting device comprises an LED lamp configured to emit light.
15. The auto-darkening welding helmet of claim 14 , wherein the lighting device includes a button configured to control the LED lamp to be powered on or off.
16. The auto-darkening welding helmet of claim 15 , wherein the auto-darkening filter comprises a control circuit configured to control the LED lamp to emit light based on the LED lamp being powered on.
17. The auto-darkening welding helmet of claim 16 , wherein the lighting device comprises a battery to power the LED lamp.
18. The auto-darkening welding helmet as recited in claim 16 , wherein the lighting device comprises a battery configured to power the lighting device and the auto-darkening filter.
19. The auto-darkening welding helmet of claim 16 , wherein the auto-darkening filter comprises an optical sensor configured to receive an arc-light signal;
based on the optical sensor receiving the arc-light signal, the control circuit is configured to determine the liquid crystal panel is in the opaque state and control the LED lamp to not emit light; and
based on the optical sensor not receiving the arc-light signal, the control circuit is configured to determine the liquid crystal panel is in the non-opaque state and control the LED lamp to emit light.
20. The auto-darkening welding helmet of claim 1 , wherein the cable passes through the helmet casing to be connected to the auto-darkening filter.