Shutter for display device of projection type

A shutter for a display device of the projection type comprising:

• a cylindrical take-up member rotatable about the central shaft thereof;
• and
• a thin board member having one end portion thereof fixed to the outer surface of said take-up member and deformable into a state rolled on the outer peripheral surface of said take-up member and having a spring force for returning to a flat state;
• said thin board member being capable of operating between a liberating position in which in conformity with the rotated position of said take-up member, it is rolled onto said take-up member and retracts from a predetermined optical path to thereby permit the passage of light in said optical path and an intercepting position in which it is unrolled from said take-up member and assumes a flat shape and protrudes into said predetermined optical path to thereby intercept the light.