Abstract: A road surface condition determination system includes: a ranging sensor that is installed at a predetermined position on a vehicle, emits light toward a road surface in a measurement area around the vehicle and receives reflected light of the emitted light, and measures a distance to the road surface based on a light reception state of the reflected light; and a determination unit that determines that the road surface is wet when the reflected light is not received by the ranging sensor, or when a measurement value measured by the ranging sensor is longer than a predetermined value.

Abstract: A drive control system (S) includes a measurement portion (1) configured to detect an obstacle (R) in a transportation vehicle (T), and a load collapse determination portion (4) configured to acquire an arrangement of a transportation target (C) loaded on the transportation vehicle (T) based on measurement data of the measurement portion (1) to determine a load collapse of the transportation target (C) based on a change in the arrangement over time.

Abstract: Provided is a weight estimation system (S) including: a change amount calculation device (2) which acquires a height of a loading platform (N) before loading a vehicle and a height of the loading platform (N) after loading the vehicle and calculates an amount of change between the heights of the loading platform (N) between before and after the loading; and a loaded weight estimation device (4) which estimates a loaded weight on the basis of a correlation between the amount of change and a loaded weight stored in advance.

Abstract: An indicating plate for a solar watch, comprising a color diffusion plate which, by virtue of the presence of a coloring agent, a coloring light diffusing agent, a colored translucent substrate, a pattern layer/colored thin film layer and a diffusion layer, is adapted to transmit a portion of light having a wavelength within a range capable of causing a solar cell housed under the indicating plate to generate power. The color diffusion plate is adapted to make it difficult to view the solar cell from the outside through the indicating plate and is also adapted to impart a color tone to the indicating plate.

Abstract: A light transmitting metallic dial 50 is disposed above a cell 2 such as an EL device, a solar battery, or the like and the light transmitting type metallic dial 50 is secured by engaging an aligning portion 50b formed on the light transmitting type metallic dial 50 with an aligning portion 4b formed on a casing frame 4. In the light transmitting type metallic dial 50, light transmitting holes 50a and 51 constituting various characters, numerals, patterns, and the like are formed. Further, when the transparent plate is laminated on the light transmitting metallic dial 50, a clearance 7 is formed between the cell 2 and the transparent plate 5 using a spacer or the like.

Abstract: A display unit structure for an electronic device is formed of a solar cell, and a display unit. The display unit includes a transparent base layer disposed on the solar cell, and a hologram layer laminated on the base layer and having a virtual mirror plane for reflecting a light with a predetermined wavelength. The virtual mirror plane of the hologram layer is inclined with respect to front and back surfaces of the hologram layer. Thus, the light with the predetermined wavelength is reflected by the hologram layer, and light other that the predetermined wavelength is transmitted to the solar cell.