Dimmer for lcd screen of digital camera

A dimmer for a screen, comprising:

• a window panel, comprising light-shielding plates, the light-shielding plates including an upper, a left side and a right side plates respectively hinged at window edges of the window panel, wherein a window of the window panel is closed off when each of the plates is folded, and a light-shielding structure is formed in front of the screen when each of the plates is straightened up, and wherein a sandwiched cavity is formed inside the upper plate;
• torsion springs that automatically straighten up the left side and right side plates at the hinged positions of the left side and right side plates;
• a fixing part fixed to the window panel at a non-hinged edge of the upper plate;
• a flat-plate magnifying lens, whose pulled-out end projects from an edge opposite to the hinged edge of the upper plate, and is slidably fitted in the sandwiched cavity, wherein the flat-plate lens is positioned in front of the screen when it is pulled out and folded downwardly.