Stanley Electric Co., Ltd

Isuzu Motors Limited

Atsushi Ohmori

Makoto Uriuhara

A plurality of convex strip portions are formed on a front surface (or a back surface) of a light guiding plate, extending in a direction from a light incidence plane to an opposite side surface. A concave portion is formed on a side surface of each convex strip portion. An inner wall of the concave portion is formed from at least two flat planes inclined with respect to three axial directions orthogonal to each other (X, Y and Z axial directions), respectively. Thereby, damage to the surface illuminant equipment such as a light guiding plate due to the interference between a back surface and units disposed on the back surface of the light guiding plate is prevented, while preventing a linear part with relatively low luminance from being viewed from the front surface of the light guiding plate.

Surface illuminant equipment

Herein disclosed is a method of controlling an automatic clutch when starting to move a vehicle such as an automobile having an automatic transmission. The maximum accelerating r.p.m. of an engine at the start is detected and stored so that a clutch actuator is kept deenergized to leave the clutch released, while the engine r.p.m. detected is lower than the maximum value stored, but is energized again to apply the clutch when the engine r.p.m. exceeds the maximum value. More specifically, the running state of the vehicle is detected to determine the operating speed of the clutch actuator, and the automatic clutch is applied at the operating speed deterined. The engine r.p.m., once the vehicle is moving is detected and compared with the maximum accelerating engine r.p.m. Then, the operating speed of the clutch actuator is dropped to zero to interrupt engagement of the clutch while the engine r.p.m. detected is smaller than the maximum engine r.p.m. Engagement of the clutch is restored when the engine r.p.m. again exceeds the maximum value.

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Tokyo, Japan

Atsushi Ohmori