• Microelectromechanical (MEMs) devices
• Fabricated using VLSI processing techniques
• 2-D array of mirrors
• Tilts +/- 10 degrees
• Electrostatically controlled
• Truly digital pixels

• Suitable only for projection displays
• Gray levels via Pulse-Width Modulation (PWM)
• Color via multiple chips or a color-wheel
• Excellent resolution and fill-factor
• Light efficient
• Problems with stray light and flicker