Display device

A display device, comprising a light source, a light-directing element, a first lens, a microlens array, a reflective display element and a light source lens, wherein

• the light source is adapted to provide a lighting beam,
• the light-directing element is disposed on the transmission path of the lighting beam for projecting the lighting beam toward an incident direction,
• the first lens is disposed on the transmission path of the lighting beam, and is configured to receive the lighting beam projected by the light-directing element and project the lighting beam toward the incident direction,
• the microlens array is disposed on the transmission path of the lighting beam, wherein the first lens is located between the microlens array and the light-directing element, and the microlens array comprises a plurality of microlenses for receiving the lighting beam projected from the first lens,
• the reflective display element is disposed on the transmission path of the lighting beam, wherein the microlens array is located between the reflective display element and the first lens, the reflective display element comprises a plurality of micro-image units, the micro-image units correspond to the microlenses respectively, the reflective display element is configured to receive the lighting beam projected from the microlens array, the micro-image units convert the lighting beam into sub-image beams and reflect the sub-image beams to the microlens array, the sub-image beams are projected to the first lens by the corresponding microlenses, the first lens converges the sub-image beams and projects the sub-image beams to the light-directing element, and the sub-image beams pass through the light-directing element and transmit to an aperture to form an image beam;
• and
• the light source lens is disposed between the light source and the light-directing element, the focal length of the light source lens is positive or negative, so that the lighting beam has a divergence angle after passing through the light source lens, so that the lighting beam projected toward the incident direction by the first lens becomes a collimated light beam.