Input device and image display apparatus including the same

An input device comprising:

• first and second light source units arranged spaced apart from each other and configured to respectively output first light having a first color and second light having a second color;
• a light guide having a circular shape and configured to receive the first light and the second light, synthesize the first light and the second light and output third synthesized light;
• a touch sensor configured to detect touch input;
• and
• a light source controller configured to change the first light output from the first light source unit or the second light output from the second light source unit according to touch input detected by the touch sensor.

An image display apparatus comprising:

• a display configured to display an image;
• an input device including first and second light source units arranged spaced apart from each other and configured to respectively output first light having a first color and second light having a second color, a light guide having a circular shape and configured to receive the first light and the second light, synthesize the first light and the second light and output third synthesized light and a touch sensor configured to detect touch input, the input device being configured to change and output at least one of the first light output from the first light source unit or the second light output from the second light source unit;
• and
• a controller configured to control an operation corresponding to touch input.