Abstract: An electric vehicle (1) includes, a chassis (10), a pair of front (21, 31) and rear wheels (22, 32) provided on a right side of the chassis (10) and a pair of front (21, 31) and rear wheels (22, 32) provided on a left side of the chassis (10), two motors (41R, 41L) that drive any of the right and left front wheels (21, 31) or the right and left rear wheels (22, 32), a sprocket (21b, 22b, 31b, 32b) and a belt (23, 33) serving as a power transmission member transmitting power between the front and rear wheels of each pair, and a battery (40) that supplies power to the electric motors (41R, 41L). Changing of a direction or turning of the electric vehicle (1) is performed by changing the rotational speed or a rotation direction by gearboxes (43R, 43L) for the power from the electric motors (41R, 41L).

Abstract: There are provided a light-emitting device, an illuminating apparatus, and a display apparatus in which, in order to apply light to an object to be illuminated with uniformity in light intensity, the quantity of light which is applied to a part of an edge of a to-be-illuminated region of the to-be-illuminated object located near a light-emitting section can be lessened. A backlight unit includes a printed substrate, a plurality of light-emitting sections each of which has a base support, an LED chip and a lens, and reflective members each of which is placed around the light-emitting section and has a first wall portion and a second wall portion.

Abstract: The invention provides a light-emitting device for use in a backlight unit of a display apparatus including a display panel, which is capable of applying light to an illumination object with uniformity in brightness in the planar direction of the illumination object and can be made lower in profile, as well as an illuminating apparatus and a display apparatus including the light-emitting device. A backlight unit (1) is provided with a printed circuit board (12), a plurality of light-emitting portions (111) disposed on the printed circuit board (12) and having a base support (111b), an LED chip (111a) and a lens (112), and a reflective member (118) disposed around each light-emitting portion (111) and having a first reflecting member (1131) and a second reflecting member (1132).

Abstract: The invention provides a light-emitting device which is capable of applying light to a display panel with uniformity in brightness and can be made lower in profile. A light-emitting device (11) includes an LED chip (111a), a base support (111b) which supports the LED chip (111a), and a lens (112) disposed in contact with the LED chip (111a) so as to cover the LED chip (111a) and the base support (111b). The lens (112) has first curved sections (1122) which reflect light that has reached a top surface (112a) so that the reflected light is emitted from a side surface (112b), and second curved sections (1123) which refract light that has reached the top surface (112a) to outside so that the refracted light is emitted from the top surface (112a).

Abstract: There are provided a light-emitting device for use in a backlight unit of a display apparatus equipped with a display panel, which can be made lower in profile and is capable of applying light to the display panel with uniformity in the brightness of the display panel in the planar direction of the display panel, as well as a display apparatus equipped with the light-emitting device. A backlight unit includes a printed substrate, a plurality of light-emitting sections each having a base support, an LED chip and a lens, and a reflective member surrounding the light-emitting section. A specular reflection portion is formed in a first reflective region of the reflective member.

Abstract: There are provided a light-emitting device, an illuminating apparatus, and a display apparatus in which, in order to apply light to an object to be illuminated with uniformity in light intensity, the quantity of light which is applied to a part of an edge of a to-be-illuminated region of the to-be-illuminated object located near a light-emitting section can be lessened. A backlight unit includes a printed substrate, a plurality of light-emitting sections each of which has a base support, an LED chip and a lens, and reflective members each of which is placed around the light-emitting section and has a first wall portion and a second wall portion.

Abstract: There are provided a light-emitting device for use in a backlight unit of a display apparatus equipped with a display panel, which can be made lower in profile and is capable of applying light to the display panel with uniformity in the brightness of the display panel in a planar direction of the display panel, as well as a display apparatus equipped with the light-emitting device. A backlight unit includes a plurality of light-emitting devices each having a printed substrate, a base support, an LED chip and a lens, and a reflective member surrounding the light-emitting device. A high-reflection portion is formed in a first reflective region of the reflective member.

Abstract: The invention provides a light-emitting device a light-emitting device for use in a backlight unit of a display apparatus including a display panel, which is capable of applying light to an illumination object with uniformity in brightness in a planar direction of the illumination object and can be made lower in profile. A backlight unit (1) is provided with: a printed circuit board (12); a plurality of light-emitting portions (111) disposed on the printed circuit board (12) and having a base support (111b), an LED chip (111a) and a lens (112); and a first reflective member (118) disposed on a periphery of each light-emitting portion (111) and having a first reflecting portion (1181) and a second reflecting portion (1182).

Abstract: An optical scanning device includes an enclosure having a plurality of windows covered with transparent members. The enclosure houses a plurality of light sources, a scanning portion, optical elements and a light amount attenuation portion. The scanning portion deflects each of a plurality of light beams emitted from a plurality of light sources at a constant angular speed in a main scanning direction. The optical elements constitute respective light paths from the scanning portion to the windows for the plurality of light beams, respectively. The light amount attenuation portion attenuates light amount in a light path of a first light source among the plurality of light sources in a downstream side of the position where a light beam emitted from a second light source enters as stray light. The drive portion drives the first light source so as to compensate for light amount attenuated by the light amount attenuation portion.

Abstract: A backlight unit has a printed circuit board, a plurality of light-emitting portions each including a base, an LED chip, and a lens, and a reflective member surrounding the light-emitting portion. An area ? of a figure defining the contour of the reflective member as planarly viewed in an optical-axis direction parallel to an optical axis of the LED chip is determined on the basis of ?×?/? in which a quantity of light which exits through the transmitting region of the lens is represented by ?, a quantity of light which exits through the entire surface of the lens is represented by ?, and an area of the lens as planarly viewed in the optical-axis direction is represented by ?.

Abstract: An optical scanning device cover, covering an upper portion of an optical scanning device, includes an exposure window, a close stopper, an open stopper, and a rotation cam plate. A projection to be held in a link portion of a rotation cam is fixedly provided on a shutter. When the rotation cam is rotated in a direction of an arrow R(1) from a state in which the shutter is closed, A-side of the shutter turns until the shutter comes into contact with the open stopper to open that side of shutter, and thereafter, the B-side of the shutter turns to open that side of the shutter.

Abstract: An optical scanning device includes an enclosure having a plurality of windows covered with transparent members. The enclosure houses a plurality of light sources, a scanning portion, optical elements and a light amount attenuation portion. The scanning portion deflects each of a plurality of light beams emitted from a plurality of light sources at a constant angular speed in a main scanning direction. The optical elements constitute respective light paths from the scanning portion to the windows for the plurality of light beams, respectively. The light amount attenuation portion attenuates light amount in a light path of a first light source among the plurality of light sources in a downstream side of the position where a light beam emitted from a second light source enters as stray light. The drive portion drives the first light source so as to compensate for light amount attenuated by the light amount attenuation portion.

Abstract: An optical output level of laser diodes is detected by a photodiode for each of the laser diodes, and this photodiode detection output is used in feedback control of the laser diodes, thereby achieving stabilization of the optical output levels of the laser diodes. Furthermore, feedback control gain and laser diode bias are stored in an EEPROM (nonvolatile memory), and the feedback control is carried out according to arithmetic processing by an integrated circuit using the gain and bias in the EEPROM such that malfunctions of the optical scanning device can be addressed by rewriting the gain and bias in the EEPROM.

Abstract: An optical scanning unit irradiates a polygon mirror with a plurality of light beams emitted from a light source according to image data, and scans and exposes a plurality of photoreceptors with the plurality of light beams as scanning lights. The optical scanning unit comprises a primary optical system unit including an optical system that emits the plurality of light beams, which are emitted from the light source toward the polygon mirror, and a secondary optical system unit including an optical system that emits the light beams, which are reflected by the polygon mirror toward the photoreceptors. The arrangement is such that the primary optical system unit is fitted removably to the secondary optical system unit, and that a combined unit of the primary optical system unit and the secondary optical system unit is removably fitted to an image forming apparatus having the photoreceptors.

Abstract: An optical scanning device cover, covering an upper portion of an optical scanning device, includes an exposure window, a close stopper, an open stopper, and a rotation cam plate. A projection to be held in a link portion of a rotation cam is fixedly provided on a shutter. When the rotation cam is rotated in a direction of an arrow R(1) from a state in which the shutter is closed, A-side of the shutter turns until the shutter comes into contact with the open stopper to open that side of shutter, and thereafter, the B-side of the shutter turns to open that side of the shutter.

Abstract: A laser scanning optical system converts a plurality of beams emitted from the laser diode (LD) into parallel light using a collimator lens, shapes the parallel light using an aperture, and executes exposure of a plurality of lines simultaneously on a photoreceptor drum. To cause a necessary emitting point interval d determined uniquely from the magnification of the optical system to coincide with an emitting point interval of the LD used, the LD is rotated by an angle ? against the main optical axis plane thereof. In this case, a converting device that converts the aspect ratio of a profile of the light beam emitted from the LD is provided. A conversion characteristic of the converting device is adjusted such that the characteristic is matched with a condition within a predetermined region following a characteristic of the optical system.

Abstract: In an exposure unit including: a laser scanning unit emitting a multiple number of beams; a polygon mirror for deflecting the multiple beams by reflection with the same facet; an optical system including optical elements for leading the beams correspondingly to a multiple number of photoreceptor drums laid out along an auxiliary scan direction, the bottom of a casing of the exposure unit to which the polygon mirror and the optical elements arranged along the directions of the beams emitted from the polygon mirror are attached is constructed so that the attachment portions of individual optical elements for each beam are differentiated in thickness from the areas where no attachment portion is formed.

Abstract: A laser scanning optical system converts a plurality of beams emitted from the laser diode (LD) into parallel light using a collimator lens, shapes the parallel light using an aperture, and executes exposure of a plurality of lines simultaneously on a photoreceptor drum. To cause a necessary emitting point interval d determined uniquely from the magnification of the optical system to coincide with an emitting point interval of the LD used, the LD is rotated by an angle ? against the main optical axis plane thereof. In this case, a converting device that converts the aspect ratio of a profile of the light beam emitted from the LD is provided. A conversion characteristic of the converting device is adjusted such that the characteristic is matched with a condition within a predetermined region following a characteristic of the optical system.

Abstract: In an exposure unit including: a laser scanning unit emitting a multiple number of beams; a polygon mirror for deflecting the multiple beams by reflection with the same facet; an optical system including optical elements for leading the beams correspondingly to a multiple number of photoreceptor drums laid out along an auxiliary scan direction, the bottom of a casing of the exposure unit to which the polygon mirror and the optical elements arranged along the directions of the beams emitted from the polygon mirror are attached is constructed so that the attachment portions of individual optical elements for each beam are differentiated in thickness from the areas where no attachment portion is formed.

Abstract: An optical scanning unit irradiates a polygon mirror with a plurality of light beams emitted from a light source according to image data, and scans and exposes a plurality of photoreceptors with the plurality of light beams as scanning lights. The optical scanning unit comprises a primary optical system unit including an optical system that emits the plurality of light beams, which are emitted from the light source toward the polygon mirror, and a secondary optical system unit including an optical system that emits the light beams, which are reflected by the polygon mirror toward the photoreceptors. The arrangement is such that the primary optical system unit is fitted removably to the secondary optical system unit, and that a combined unit of the primary optical system unit and the secondary optical system unit is removably fitted to an image forming apparatus having the photoreceptors.