Light guide plate, display device, and electronic apparatus with display

A display device comprising:

• a light source;
• a display in which the contents being displayed are made clearly visible by irradiation with light of said light source;
• and
• a light guide plate by which the light coming in from said light source is guided and let go out toward said display;
• wherein said light guide plate includes
• a side end face on which light from a light source is incident,
• an incoming part which forms said side end face and by which said light coming in through said side end face is guided,
• a principal surface which is formed in a direction perpendicular to said side end face and through which said light guided by said incoming part is let go out, and
• a main body part which forms said principal surface and which is continuous with said incoming part on the opposite side from said side end face,
• said incoming part is so formed as to have a thickness on the side end face side greater than the thickness of said main body part, and has
• a bent light guide part by which the light coming in through said side end face outside the range of thickness of said main body part is guided into the range of thickness of said main body part while being changed in direction,
• said bent light guide part has
• an inclined front surface which is so inclined that a surface in a direction perpendicular to said side end face is continuous with said principal surface, and
• an inclined back surface inclined on the opposite side from said inclined front surface so as to be parallel to said inclined front surface, and
• a reflecting member is provided which is disposed along the outside of at least one of said inclined front surface and said inclined back surface and by which the light leaking from said bent light guide part is reflected toward said bent light guide part or said main body part.

An electronic apparatus with a display, comprising:

• a light source;
• a display in which the contents being displayed are made clearly visible by irradiation with light of said light source;
• a light guide plate by which the light coming in from said light source is guided and let go out toward said display;
• and
• an electronic controller operable to electronically control said light source and said display;
• wherein said light guide plate includes
• a side end face on which light from a light source is incident,
• an incoming part which forms said side end face and by which said light coming in through said side end face is guided,
• a principal surface which is formed in a direction perpendicular to said side end face and through which said light guided by said incoming part is let go out, and
• a main body part which forms said principal surface and which is continuous with said incoming part on the opposite side from said side end face,
• said incoming part is so formed as to have a thickness on the side end face side greater than the thickness of said main body part, and has
• a bent light guide part by which the light coming in through said side end face outside the range of thickness of said main body part is guided into the range of thickness of said main body part while being changed in direction,
• said bent light guide part has
• an inclined front surface which is so inclined that a surface in a direction perpendicular to said side end face is continuous with said principal surface, and
• an inclined back surface inclined on the opposite side from said inclined front surface so as to be parallel to said inclined front surface, and
• a reflecting member is provided which is disposed along the outside of at least one of said inclined front surface and said inclined back surface and by which the light leaking from said bent light guide part is reflected toward said bent light guide part or said main body part.