Use certain structural part to fix LCD and conducting bar to PCB.
It needs no welding, so there’s no damage to thermal effect device. If needed, use conductive silica gel instead of welding to connect electronic components which are easily damaged.
Another way is to place it in surroundings with high temperature and radiation. Conductive silica gel makes the connected point in a tight condition so that it assures of moisture-proof and anti-corrosion. In addition, there’s no damage to display glass and contact surface. Hermetic seal protects PCB from corrosion in disadvantage circumstances to assure of good connection. There’s cushion and shockproof effect as well.
Points for attention
Workers shall wear insulated gloves before operating conducting bar. Although the bar itself isn’t electric conduction, it doesn’t mean that the objects connected by the bar are not conduction either. Another important thing is that the objects shall be cut off from any power.