Arduino power issues

Hi! I am a beginner. I have powered the ultrasonic sensor and lcd through the +5V pin of arduino uno. The sensor works but the lcd does not work and shows a faint backlight. But when i use them separately they work fine. Please help me with this issue.

Please read the "how to use the forum" stickies. There is information about what we need to know in order to be of assistance. Which Arduino? Which LCD? Which ultrasonic sensor? A wiring diagram always helps. And of course the code, in code tags as specified in the stickies.