Abstract: An optical device comprises: at least one first reflecting surface disposed so as to reflect first light that has a light distribution having an optical axis parallel to a first axis, to an arc-shaped first region surrounding the first axis; and a second reflecting surface and a third reflecting surface that are disposed such that the second reflecting surface and the third reflecting surface meet each other on the first axis, and such that the first reflecting surface is disposed between the second reflecting surface and the third reflecting surface.

Abstract: An optical device comprises: at least one first reflecting surface disposed so as to reflect first light that has a light distribution having an optical axis parallel to a first axis, to an arc-shaped first region surrounding the first axis; and a second reflecting surface and a third reflecting surface that are disposed such that the second reflecting surface and the third reflecting surface meet each other on the first axis, and such that the first reflecting surface is disposed between the second reflecting surface and the third reflecting surface.

Abstract: An illumination device includes: an optical fiber, the optical fiber allowing light emitted from a light source to be introduced at a first end portion thereof and to be guided through the optical fiber while emitting a portion of the light through a side surface of the optical fiber; a light-transmissive tube, the light-transmissive tube covering the side surface of the optical fiber such that a gap is located between the tube and the side surface of the optical fiber; and a light-shielding cap covering a second end portion of the tube at a side opposite the light source such that a space is located between a bottom portion of the cap and the second end portion of the tube. A second end portion of the optical fiber projects past the second end portion of the tube and is located at an inner side of the cap.

Abstract: An illumination device includes: an optical fiber, the optical fiber allowing light emitted from a light source to be introduced at a first end portion thereof and to be guided through the optical fiber while emitting a portion of the light through a side surface of the optical fiber; a light-transmissive tube, the light-transmissive tube covering the side surface of the optical fiber such that a gap is located between the tube and the side surface of the optical fiber; and a light-shielding cap covering a second end portion of the tube at a side opposite the light source such that a space is located between a bottom portion of the cap and the second end portion of the tube. A second end portion of the optical fiber projects past the second end portion of the tube and is located at an inner side of the cap.

Abstract: An LED driving apparatus is provided. The apparatus includes an LED Portion 10, a charging/discharging capacitor 111, a capacitor charging and discharging paths, and a capacitor charging constant current portion 110. The LED driving portion 3 controls a current in the LED portion 10. The capacitor 111 is connected in parallel to the LED portion 10. The charging and discharging paths are connected to the capacitor whereby charging and discharging the capacitor, respectively. The constant current portion 110 is connected on the charging path and controls a charging current so that the capacitor is charged at a constant current. When rectified voltage applied to the LED portion becomes high, the capacitor is charged with the charging current through the charging path. When the voltage becomes low, the capacitor is discharged at a discharging current through the discharging path so that the discharging current is applied to the LED portion.

Abstract: A charging diode 6 is connected to the capacitor 3 and the anode of a first LED 11, and limits the direction of the charging current. A discharging diode 7 is connected to the capacitor 3 and the cathode of the first LED 11, and limits the direction of the discharging current. A charging path CP is provided which includes the capacitor 3, the charging diode 6, and the charger 5. The capacitor 3 is charged through the charging path CP. A discharging path DP is provided which includes the capacitor 3, the discharging diode 7 and a discharger 4. The capacitor 3 is discharged through the discharging path DP. A transient path TP is provided which does not include the capacitor 3 but includes the first LED 11, the charger 5 and the discharger 4.

Abstract: An apparatus includes first and fourth bypasses, a current detector, and a current controller. The first bypass is connected serially to a first LED, and controls the current amount in the first LED. The fourth bypass is connected serially to a second LED, and controls the current amount in the first and second LEDs. The detector detects current detection signal based on the current amount on an output line along which the first and second LEDs are connected serially to each other. The controller provides control signal for controlling the first and fourth bypasses based on the detection signal. The controller includes one output for providing the control signal. The first and fourth bypasses are connected in parallel to the one output.

Abstract: An LED driving apparatus for suppressing harmonic components is provided. First and fourth portions 21 and 24 are in parallel to the first and second LEDs 11 and 12, respectively. The first portion 21 controls the current amount in said first LED 11. The fourth portion 24 controls the current amount in said first and second LEDs 11 and 12. The first and fourth controllers 31 and 34 control the first and fourth portions 21, respectively. A current detector 4 detects a signal based on the amount of a current flowing from the first and second LEDs 11 and 12. A signal providing portion 6 provides a voltage based on a rectified voltage provided from a rectifying circuit 2. The first and fourth controllers 31 and 34 compare the current detection signal with the signal voltage, and control the first and fourth portions 21 and 24 based on the comparison.

Abstract: A LED driving apparatus includes a rectifying circuit, first, second and third blocks, and first and second switching portions. The rectifying circuit is connected to AC power supply, and rectifies AC voltage of the AC power supply to provide pulsating current voltage. Each block includes a plurality of LEDs. The first, second and third blocks are serially connected to the output side of the rectifying circuit. The first switching portion switches ON/OFF of a first bypass path based on flowing current amount in the first block. The first bypass path bypasses the second block. The second switching portion switches ON/OFF of a second bypass path based on flowing current amount in the first and second blocks. The second bypass path bypasses the third block.

Abstract: An LED driving apparatus for suppressing harmonic components is provided. First and fourth portions 21 and 24 are in parallel to the first and second LEDs 11 and 12, respectively. The first portion 21 controls the current amount in said first LED 11. The fourth portion 24 controls the current amount in said first and second LEDs 11 and 12. The first and fourth controllers 31 and 34 control the first and fourth portions 21, respectively. A current detector 4 detects a signal based on the amount of a current flowing from the first and second LEDs 11 and 12. A signal providing portion 6 provides a voltage based on a rectified voltage provided from a rectifying circuit 2. The first and fourth controllers 31 and 34 compare the current detection signal with the signal voltage, and control the first and fourth portions 21 and 24 based on the comparison.

Abstract: A charging diode 6 is connected to the capacitor 3 and the anode of a first LED 11, and limits the direction of the charging current. A discharging diode 7 is connected to the capacitor 3 and the cathode of the first LED 11, and limits the direction of the discharging current. A charging path CP is provided which includes the capacitor 3, the charging diode 6, and the charger 5. The capacitor 3 is charged through the charging path CP. A discharging path DP is provided which includes the capacitor 3, the discharging diode 7 and a discharger 4. The capacitor 3 is discharged through the discharging path DP. A transient path TP is provided which does not include the capacitor 3 but includes the first LED 11, the charger 5 and the discharger 4.

Abstract: An LED driving apparatus is provided. The apparatus includes an LED Portion 10, a charging/discharging capacitor 111, a capacitor charging and discharging paths, and a capacitor charging constant current portion 110. The LED driving portion 3 controls a current in the LED portion 10. The capacitor 111 is connected in parallel to the LED portion 10. The charging and discharging paths are connected to the capacitor whereby charging and discharging the capacitor, respectively. The constant current portion 110 is connected on the charging path and controls a charging current so that the capacitor is charged at a constant current. When rectified voltage applied to the LED portion becomes high, the capacitor is charged with the charging current through the charging path. When the voltage becomes low, the capacitor is discharged at a discharging current through the discharging path so that the discharging current is applied to the LED portion.

Abstract: A LED driving apparatus includes a rectifying circuit 2, first, second and third blocks 11, 12 and 13, and first and second switching portions. The rectifying circuit 2 is connected to AC power supply, and rectifies AC voltage of the AC power supply to provide pulsating current voltage. Each block includes a plurality of LEDs. The first, second and third blocks 11, 12 and 13 are serially connected to the output side of the rectifying circuit 2. The first switching portion switches ON/OFF of a first bypass path BP1 based on flowing current amount in the first block 11. The first bypass path BP1 bypasses the second block 12. The second switching portion switches ON/OFF of a second bypass path BP2 based on flowing current amount in the first and second blocks 11 and 12. The second bypass path BP2 bypasses the third block 13.

Abstract: A label printing apparatus includes a liquid crystal display unit for displaying an input character string and a message corresponding to each operation stage, a printing unit for printing a character string on each label, a storage unit for storing each data, and a CPU for performing each processing and control. Label information specifying sizes and the like of various types of labels, sheet numbers corresponding to the label information, character size information defining character sizes, and the like are stored in the storage unit. The CPU specifies label information corresponding to the sheet number and selects a maximum printable character size from a character size table as an initial value on the basis of a printing area. The character size is changed so that the horizontal length of an input character string falls within the printing area. The character size is further changed so that all the characters of the character string extending in all the lines fall within the printing area.

Abstract: A coloring apparatus comprises a transfer head C having a heating element elastically protruding from an apparatus body 1, a tape accommodating portion B, and a tape feeding portion A having a winding up shaft 17, etc., which are incorporated within the apparatus body 1. A using method comprises, holding the apparatus body 1, pressing the transfer head C on the copied image of the xerographic copy, and heating by a heating element. Next, the apparatus body 1 is moved as the transfer head C is pressed onto the copied image, whereby the colored donor layer is peeled off from the transfer tape to stick the colored donor layer onto the copied image on the xerographic copy.

Abstract: A label printing apparatus includes a liquid crystal display unit for displaying an input character string and a message corresponding to each operation stage, a printing unit for printing a character string on each label, a storage unit for storing each data, and a CPU for performing each processing and control. Label information specifying sizes and the like of various types of labels, sheet numbers corresponding to the label information, character size information defining character sizes, and the like are stored in the storage unit. The CPU specifies label information corresponding to the sheet number and selects a maximum printable character size from a character size table as an initial value on the basis of a printing area. The character size is changed so that the horizontal length of an input character string falls within the printing area. The character size is further changed so that all the characters of the character string extending in all the lines fall within the printing area.

Abstract: An image pickup device for viewing an image on a wall surface includes a mask for defining the extent of the focal plane of a viewed image which will be reproduced by a linear image sensor positioned to scan the masked area. Binary data representative of the scanned image is generated and controls a printer which reproduces the masked portion of the image. The size of the masked image is restored to the full size capability of the printer by a data scaling circuit which precludes the need for utilizing a zoom lens in the image pickup device.

Abstract: An image signal processor is capable of precisely reading a dark-colored character or the like drawn on a light-colored background, such as a white board, and to perform binary encoding, but also capable of precisely reading a light-colored character or the like drawn on a dark-colored background, such as a blackboard, and to perform binary encoding. The image signal processor includes an automatic gain control circuit for receiving an image signal generated by an image pickup element and for changing to either a first cutoff frequency for performing automatic gain control on only a low-frequency component of the signal or a second cutoff frequency for performing automatic gain control on both the low-frequency component and a high-frequency component of the image signal.

Abstract: An image pickup printing device wherein images such as characters or diagrams written on a board or the like are made incident through a lens, the incidental images are monitored by a view-finder, the thus-monitored images are converted into the information by a one-dimensional image sensor, and the images are printed out by a printer based on informations obtained by the one-dimensional image sensor.