Abstract: An LED indicator casing (1R) has: a casing (1a) including a bottom face (S1), a front face (S2) having an aperture (2a) for light emission, and paired side faces (S3 and S4) adjoining the front face (S2); and paired lead terminals (11 and 12), one of which has a light-emitting element (LED)(21) fitted thereto. The paired lead terminals (11 and 12) are led out to the bottom face (S1) via the paired side faces (S3 and S4) of the casing (1a) respectively.

Abstract: A light-emitting device offering satisfactory light emission characteristics combined with improved reliability has a substrate on the principal surface of which a non-polar electrode layer is formed, an LED chip mounted in a predetermined region on the non-polar electrode layer, a plurality of cathode and anode electrode layers formed on the principal surface of the substrate for supplying electric power to the LED chip, and a reflective frame formed of a metal material containing aluminum as its main content, the reflective frame having its inner circumferential surface formed into a reflective surface for reflecting the light from the LED chip. The reflective frame is fixed, directly, or indirectly with adhesive, to the non-polar electrode layer so as to surround the LED chip, with the inside of the reflective frame sealed with a light-transmitting member.

Abstract: A light-emitting device offering satisfactory light emission characteristics combined with improved reliability has a substrate on the principal surface of which a non-polar electrode layer is formed, an LED chip mounted in a predetermined region on the non-polar electrode layer, a plurality of cathode and anode electrode layers formed on the principal surface of the substrate for supplying electric power to the LED chip, and a reflective frame formed of a metal material containing aluminum as its main content, the reflective frame having its inner circumferential surface formed into a reflective surface for reflecting the light from the LED chip. The reflective frame is fixed, directly, or indirectly with adhesive, to the non-polar electrode layer so as to surround the LED chip, with the inside of the reflective frame sealed with a light-transmitting member.

Abstract: A light-emitting device (1) is composed by integrating light-emitting diodes (2R, 2G, 2B) and a drive IC (3) for driving these light-emitting diodes (2R, 2G, 2B). The light-emitting device (1) is characterized in that the drive IC (3) has a built-in circuit for controlling the current value of each light-emitting diode (2) or the current proportions of the light-emitting diodes at constant values. The adjustment of the intensities of the light beams emitted from the light-emitting diodes can be simplified, and no outside circuits for adjustment are needed. The structure is excellent in assemblability. When a desired emission color is produced by mixing the emission colors, the adjustment for the mixing is easy, and a structure suited for enhancing the color rendering properties when a while light is emitted is provided.

Abstract: An LED indicator casing (1R) has: a casing (1a) including a bottom face (S1), a front face (S2) having an aperture (2a) for light emission, and paired side faces (S3 and S4) adjoining the front face (S2); and paired lead terminals (11 and 12), one of which has a light-emitting element (LED) (21) fitted thereto. The paired lead terminals (11 and 12) are led out to the bottom face (S1) via the paired side faces (S3 and S4) of the casing (1a) respectively.

Abstract: An LED device comprises first to N-th (N is an integer of 2 or more) LEDs each having one end connected to one another and having different emission colors, and first to N-th transistors each having one end connected to the other ends of the individual LEDs and the other end connected to one another. The first to N-th transistors configure a current mirror circuit. A drive current supplied from outside is distributed to the individual LEDs at a current ratio corresponding to a size ratio of the individual transistors.

Abstract: From a latch circuit (12) composed of five stages of latch circuits each storing data signals corresponding to one line, data signals to be fed to a drive circuit (16) to light the corresponding light-emitting sections are selected by a select circuit (15) selects according to correction data, consisting of 9 bits for each light-emitting section, stored in a Y position correction data storage circuit (13). This permits adjustment of the timing with which the individual light-emitting sections are lit and thereby helps achieve printing with satisfactory linearity.

Abstract: A driving IC 1 having n output terminals for outputting drive currents to the individual electrodes of a light emitting element (22), and a selecting IC 2 having every n/m output terminals for every m groups with respect to the common electrode of the light emitting element (22) are respectively provided on the opposite sides of the light emitting element (22) with one-to-one correspondence with respect to the element (22).

Abstract: A data signal which is output from a latch circuit (12) having five stages of latch circuits each storing one-line data signal to a drive circuit (16) for lighting each light emission unit is selected by a selection circuit (15) according to a 9-bit correction data signal for each of the light emission units stored in a Y-position correction data storage circuit (13). Thus, lighting timing of each light emission unit is adjusted, thereby performing printing having a preferable linearity.

Abstract: An optical print head has a light-emitting device 22 having n individual electrodes 28, p common electrodes 27, and a plurality of (n×p) light-emitting parts 26 selected by those individual and common electrodes and a driving IC 1 having individual electrodes and m group-selecting terminals CD1 to CD40. A plurality of (q) light-emitting devices 22 are provided for one driving IC 1, and the number (q) of light-emitting devices 22 is determined by the number (p) of common electrodes 27 provided on each light-emitting device 22 and the number (m) of the group-selecting terminals CD provided on the driving IC 1.

Abstract: A driving IC 1 having n output terminals for outputting drive currents to the individual electrodes of a light emitting element (22), and a selecting IC 2 having every n/m output terminals for every m groups with respect to the common electrode of the light emitting element (22) are respectively provided on the opposite sides of the light emitting element (22) with one-to-one correspondence with respect to the element (22).

Abstract: A data signal which is output from a latch circuit (12) having five stages of latch circuits each storing one-line data signal to a drive circuit (16) for lighting each light emission unit is selected by a selection circuit (15) according to a 9-bit correction data signal for each of the light emission units stored in a Y-position correction data storage circuit (13). Thus, lighting timing of each light emission unit is adjusted, thereby performing printing having a preferable linearity.

Abstract: From a latch circuit (12) composed of five stages of latch circuits each storing data signals corresponding to one line, data signals to be fed to a drive circuit (16) to light the corresponding light-emitting sections are selected by a select circuit (15) selects according to correction data, consisting of 9 bits for each light-emitting section, stored in a Y position correction data storage circuit (13). This permits adjustment of the timing with which the individual light-emitting sections are lit and thereby helps achieve printing with satisfactory linearity.

Abstract: A driver IC includes a first driver section for supplying driving signals to n output terminals and a second driver section for selectively switching one of m selection terminals (m≧3) to a predetermined potential. The first driver section includes a timing control circuit for generating timing signals that permit the second driver section to perform the selective switching. The timing control circuit generates the timing signals based on control signals fed thereto from outside by way of a number of signal lines fewer than m.

Abstract: A method for manufacturing a display apparatus including a display device, a circuit device which supplies a driving current to the display device and a selecting circuit for regulating the drive current of the circuit device into a plurality of steps of current values. The display apparatus is manufactured in the following steps: a step of allocating the display device to one of a plurality of ranks according to its light quantity; a step of allocating the circuit device to one of a plurality of ranks according to its output current, and a step of selecting based on the rank of the display device and the rank of the circuit device a selection value of the selecting circuit previously prepared according to a combination of ranks of the display device and the circuit device.