Abstract: Light flux controlling member 140 includes first light flux controlling member 141 and second light flux controlling member 142. First light flux controlling member 141 includes incidence surface 143 on which a part of light emitted from light-emitting element 130 is incident, total reflection surface 144 that reflects a part of light incident on incidence surface 143 toward second light flux controlling member 142, and emission surface 145 that emits a part of light incident on incidence surface 143 and light reflected by total reflection surface 144. Second light flux controlling member 142 includes reflection surface 149 that reflects a part of light emitted from first light flux controlling member 141. Reflection surface 149 is a rotational symmetric surface with the optical axis LA of light-emitting element 130 as a rotation axis.

Abstract: A socket for electric parts which is dawn sized. The socket of the present invention comprises a socket body to accommodate an electric part, plural contact pins disposed to a peripheral edge of the socket body, a latch rotatably located on the socket body so as to positioned above the contact pins, which presses an upper part of the electric part when the latch is closed and is in a state the electric part can be accommodated and taken out when the latch is opened, an operating member which is vertically movably disposed in the socket body and comprises an operating portion for opening constituted so as to press down an operation portion to be operated for opening formed to a central portion in a width direction of the latch and rotate the latch in an opening direction when the operating member moves downward.

Abstract: A socket for electric parts which is dawn sized. The socket of the present invention comprises a socket body, contact pins to conduct to an electric part, a latch rotatably located on the socket body so as to positioned above the contact pins, which presses the electric part when the latch is closed and is in a state the electric part can be accommodated and taken out when the latch is opened, and an operating member vertically movably disposed in the socket body and comprises an operating portion for opening constituted so as to press down an operation portion to be operated for opening formed to the latch and rotate the latch in an opening direction when the operating member descends. A outermost position of the latch is disposed on an inside of outermost portion of the contact pins when the latch is opened to an outermost position.

Abstract: A socket for electric part which suppresses a warp of a floating plate caused by the bias power of the spring even if a bending stiffness of the floating plate is low. The socket for electrical part according to a preferred embodiment of the present invention comprises a unit body being located on a interconnection substrate and having through holes into which the contact terminals are inserted, a floating plate holding an IC package and vertically movably supported at the upper part of the socket body, a rivet put in the floating plate to guide a vertical movement of the floating plate, and a spring located between a part of the socket body and the rivet to biases the floating plate upward via the rivet.

Abstract: The present invention relates to light flux controlling member (140) formed by injection molding, light emitting apparatus (120) having light flux controlling member (140), surface light source apparatus (100) having light emitting apparatus (120), and a display apparatus having surface light source apparatus (100). Light flux controlling member (140) includes light control emission surface (141) configured to control light distribution of light emitted from light emitting element (130), and back face (142) opposite to light control emission surface (141). Light flux controlling member (140) is formed by injection molding by an overlap gate scheme, or by combination of the overlap gate scheme and a side gate scheme. Therefore, on back face (142) of light flux controlling member (140), there remains gate remnant (147) in such a manner to be in contact with an outer rim.

Abstract: A light guide panel 1 having a reflective sub-wavelength diffraction grating 3 generates zero-order light and minus first-order light in the reflective sub-wavelength diffraction grating 3, extracts the minus first-order light as outgoing light, and transmits the zero-order light to generate new minus first-order light by satisfying the conditional expressions: sin?1(1/n)<?1??(1) ?/{n(sin ?1+1)}??<min[2?/{n(sin ?1+1)},?/{n(?sin ?1+1)}]??(2) sin?1{sin ?1??/(n·?)}<sin?1(1/n)??(3) where, ?: wavelength of light n: refractive index of a light guide panel main body ?: period of the reflective sub-wavelength diffraction grating ?1: angle of incidence of the light in relation to the reflective sub-wavelength diffraction grating