Apparatus for reducing mirror bounce, photographing apparatus comprising the same, and photographing method for the same

1. An image processing apparatus comprising:

a mirror installed to revolve with respect to a shaft;

a first guide unit disposed in a path of revolution of the mirror to lessen vibration of the mirror when the mirror revolves; and

a first elastic unit configured to apply a predetermined elastic force onto the first guide unit while being engaged with the first guide unit, wherein the first elastic unit is configured to apply the predetermined elastic force onto the first guide unit in one direction before pressure applied onto the first elastic unit reaches a predetermined threshold level, and configured to apply the predetermined elastic force onto the first guide unit in a direction which is substantially opposite to the direction when the pressure applied surpasses the predetermined threshold level.

2. The apparatus of claim 1 , wherein, when the mirror revolves and one end of the mirror presses against the first guide unit, the first elastic unit is configured to apply the predetermined elastic force on the first guide unit in order to allow the first guide unit to press against the mirror in a direction substantially opposite to a direction of the revolution of the mirror, before the pressure applied onto the first elastic unit reaches the predetermined threshold level.

3. The apparatus of claim 1 , wherein, when the mirror revolves and one end of the mirror presses the first guide unit, the first elastic unit is configured to apply the predetermined elastic force on the first guide unit in order to allow the first guide unit to press against the mirror in a direction of the revolution of the mirror, after the pressure applied onto the first elastic unit surpasses the predetermined threshold level.

4. The apparatus of claim 1 , wherein the elastic unit comprises a torsion spring.

5. The apparatus of claim 4 , wherein, when the mirror revolves and one end of the mirror presses against the first guide unit, the torsion spring is configured to apply the predetermined elastic force on the first guide unit in order to allow the first guide unit to press against the mirror in a direction substantially opposite to a direction of the revolution of the mirror, before the pressure applied to the torsion spring reaches a predetermined threshold level.

6. The apparatus of claim 4 , wherein, when the pressure applied to the torsion spring surpasses the predetermined threshold level while the mirror revolves and one end of the mirror presses against the first guide unit, the elastic force is configured to act to separate both ends of the torsion spring from each other and thus the first guide unit presses against the mirror in a direction of revolution of the mirror.

7. The apparatus of claim 1 , wherein the first guide unit comprises:

a first projection formed such that the mirror is to be placed on the first projection; and

a second projection formed to face the first projection in order to press against the mirror.

8. The apparatus of claim 7 , wherein, when the mirror revolves and one end of the mirror presses against the first projection, the first elastic unit is configured to apply the predetermined elastic force on the first projection in order to allow the first projection to press against the mirror in a direction opposite to a direction of the revolution of the mirror, before the pressure applied onto the first elastic unit reaches the predetermined threshold level.

9. The apparatus of claim 7 , wherein, when the mirror revolves and one end of the mirror presses against the first projection, the first elastic unit is configured to apply the predetermined elastic force on the second projection in order to allow the second projection to press against the mirror in a direction of the revolution of the mirror, after the pressure applied onto the first elastic unit has surpassed the predetermined threshold level.

10. The apparatus of claim 1 , further comprising:

a second guide unit disposed in the path of revolution of the mirror configured to lessen vibration of the mirror when the mirror revolves; and

a second elastic unit configured to apply a predetermined elastic force on the second guide unit while being engaged with the second guide unit.

11. The apparatus of claim 10 , wherein, when the mirror revolves and one end of the mirror presses against the second guide unit, the second elastic unit is configured to apply a predetermined elastic force on the second guide unit in order to allow the second guide unit to press against the mirror in a direction substantially opposite to the direction of revolution of the mirror.

12. The apparatus of claim 10 , further comprising a stopper preventing the second guide unit from excessively revolving.

13. The apparatus of claim 10 , wherein the first guide unit and the second guide unit are configured to substantially press against the mirror in opposite directions.

14. The apparatus of claim 10 , wherein the first elastic unit and the second elastic unit are configured to substantially apply forces onto the mirror in opposite directions of each other in order to lessen vibration of the mirror when the mirror revolves.

15. A photographing apparatus comprising:

a mirror installed to revolve with respect to a shaft;

a first guide unit disposed in a path of revolution of the mirror to lessen vibration of the mirror when the mirror revolves;

a first elastic unit configured to apply a predetermined elastic force onto the first guide unit while being engaged with the first guide unit, wherein the first elastic unit is configured to apply the predetermined elastic force onto the first guide unit in one direction before pressure applied onto the first elastic unit reaches a predetermined threshold level, and configured to apply the predetermined elastic force onto the first guide unit in a direction which is substantially opposite to the direction when the pressure applied surpasses the predetermined threshold level;

a lens on which light is incident;

an imaging device configured to convert energy of the incident light into an electrical signal;

a display unit configured to display an image captured by the imaging device; and

a mirror configured to change a direction of propagation of the incident light.

16. A method of photographing an image by using an imaging apparatus having an image processing device, the method comprising:

(a) moving a mirror downward while revolving in a first direction;

(b) when the mirror contacts a first guide unit and pushes the first guide unit in the first direction, applying, via a first elastic unit, a predetermined elastic force onto the first guide unit in order to allow the first guide unit to push the mirror in a direction opposite to the first direction; and

(c) when the first elastic unit elastically deforms to a predetermined threshold level, applying, via the first elastic unit, a predetermined elastic force onto the first guide unit in order to allow the first guide unit to push the mirror in the first direction.

17. The method of claim 16 , further comprising (d) when the mirror contacts a second guide unit and pushes the second guide unit in the first direction, applying, via a second elastic unit, a predetermined elastic force onto the second guide unit in order to allow the second guide unit to push the mirror in the direction opposite to the first direction.

18. The method of claim 17 , wherein the first guide unit and the second guide unit press against the mirror in substantially opposite directions.

19. The method of claim 17 , wherein the first elastic unit and the second elastic unit apply forces onto the mirror in substantially opposite directions in order to lessen vibration of the mirror when the mirror revolves.