967results about How to "Suppress power consumption" patented technology

Each pixel cell (12) of an image sensor (10) is made of a 4-Tr structure, in which only one Tr for resetting a column (X) is so added to an ordinary 3-Tr APS as to reset only an arbitrary pixel selectively, thereby to confine the pixel size. When a pixel signal is to be read, the period, for which the pixel signals composing an ordinary image of one frame are read, is finely divided so that the pixel signals of the pixels receiving an ID light for the period are read out bit by bit and repeatedly. At this time, for only the column being read, an electric current is fed to a read amplifier in the pixel cell (12) or a variable gain amplifier in an output unit (14), thereby to suppress the power consumption. As a result, a lower power consumption and a higher pixel formation can be attained in an image pickup device for picking up an image and for acquiring the ID information of a light beacon existing in the image pickup range.

A headlight can form a light distribution pattern that prevents uneven brightness when the headlight is set to a high beam mode, and also minimizes power consumption when the headlight is set to the high beam mode. The vehicle light can include a multi-focal lens that has a mid-level lens portion, an upper-level lens portion, and lower-level lens portion. A separator plate can have a front edge positioned at or near the focal point of the mid-level lens portion. Light emitting elements can be mounted on top and bottom of the separator plate, respectively. A first elliptical reflecting surface whose first focal point is set at or near the first light emitting element and whose second focal point is set at or near the focal point of the mid-level lens portion can be provided. A second elliptical reflecting surface can also be provided whose first focal point is set at or near the second light emitting element and whose second focal point is set at or near the focal point of the upper-level lens portion. A hyperbolic reflecting surface can be located adjacent the second elliptical reflecting surface and can have an inner focal point set at or near the second light emitting element and an outer focal point set at or near the focal point of the lower-level lens portion. The vehicle light can be configured such that the first light emitting element and the second light emitting element can selectively emit light beams.

It is an object of the present invention to provide a lighting device realizing reduction in cost and suppression of power consumption and suppressing generation of a lamp image. A lighting device 12 of the present invention includes a plurality of point light sources 80; a chassis 14 housing the point light sources 80 and having an opening 14b through which light from the point light sources 80 exits; and an optical member 15 (15a) facing the point light sources 80 and provided to cover the opening 14b. The point light sources 80 are arranged such that a light source high-density area LH where an arrangement interval thereof is relatively small and a light source low-density area LL where an arrangement interval thereof is relatively large are provided. Light reflection portions 50 reflecting lights from the point light sources 80 are formed in at least a region overlapping with the light source low-density area LL in the optical member 15 (15a).

An object is to provide a display device with low power consumption and good display quality. A first substrate is provided with a terminal portion, a pixel electrode, a switching transistor including an oxide semiconductor, a first optical sensor having high optical sensitivity to visible light, and a second optical sensor having optical sensitivity to infrared light and having lower optical sensitivity to visible light than the first optical sensor. The illuminance or color temperature around a display device is detected using the first and second optical sensors, and the luminance or color tone of a display image is adjusted. A second substrate is provided so as to face the first substrate, and is provided with a counter electrode. In a period for displaying a still image, the switching transistor is turned off so that the counter electrode is brought into a floating state.