Abstract: Occurrence of color unevenness and collapsing of white balance is suppressed when a backlight device having a configuration combining a blue LED and a wavelength conversion sheet is adopted. In a direct backlight device (600) adopting a configuration combining a blue LED (63) and a phosphor sheet (65) to obtain white light, a convex lens (67) as a condenser lens is provided above each blue LED (63) mounted on an LED substrate (62). The convex lens (67) receives light emitted from the blue LED (63) and emits the light to the phosphor sheet (65) side so that an emission angle is smaller than an incident angle.

Abstract: By a simple circuit configuration, luminance unevenness is suppressed, and charge remaining after a power source supply is interrupted is suppressed. A slope control unit (52) generates a switch control signal (Von) having a waveform with a falling slope, by switching between a grounded state of being connected to a ground and an ungrounded state, and modulating the waveform of a high voltage (VGH), and in a case where a power supply from the outside is interrupted, the slope control unit (52) is in the ungrounded state.

Abstract: A display device capable of accurately supplying a voltage used to generate a gate signal and a voltage used to drive a nonvolatile memory is provided using a simple configuration. A DC/DC converter 20 switches between a first state of converting an input voltage (Vin) into a voltage (Vs) used to drive a nonvolatile memory and a second state of converting the input voltage (Vin) into a voltage (Vg) used to generate a gate signal.

Abstract: By a simple circuit configuration, luminance unevenness is suppressed, and charge remaining after a power source supply is interrupted is suppressed. A slope control unit (52) generates a switch control signal (Von) having a waveform with a falling slope, by switching between a grounded state of being connected to a ground and an ungrounded state, and modulating the waveform of a high voltage (VGH), and in a case where a power supply from the outside is interrupted, the slope control unit (52) is in the ungrounded state.

Abstract: Disclosed is a liquid crystal display device wherein display performance of a two-dimensional image and that of a three-dimensional image are both improved. The liquid crystal display device is provided with: a liquid crystal display panel, which displays the two-dimensional image and the three-dimensional image by selectively switching the images; and a backlight, which supplies light to the liquid crystal display panel. The backlight includes an illuminating region, which is scan-lighted corresponding to scanning of the liquid crystal display panel, and the scanning frequencies of the illuminating region at the time of displaying the two-dimensional image and the three-dimensional image on the liquid crystal display panel are different from each other.

Abstract: An LED backlight in which deterioration in in-plane uniformity of brightness is prevented, whose thickness, frame width, and wire length are reduced, and in which wiring can be carried out easily, includes an LED provided on one surface of an LED substrate; the LED substrate is mounted on a chassis panel so that a surface of the LED substrate opposite to the one surface contacts the chassis panel; and the chassis panel has a connection hole provided in a portion of a region of the chassis panel in which region the LED substrate is mounted, which passes through the chassis panel.

Abstract: An illumination device (4) includes a light-emitting diode (light-emitting element) (9) and an LED substrate (light source substrate) (8) including a mounting surface (8a) on which the light-emitting diode (9) is mounted. A plurality of the light-emitting diodes (9) are mounted on the mounting surface (8a) of the LED substrate (8) and an LED driver (driving circuit element) (11) for driving the light-emitting diodes (9) is provided on the backside (8b) of the mounting surface (8a).

Abstract: Disclosed is a liquid crystal display device wherein display performance of a two-dimensional image and that of a three-dimensional image are both improved. The liquid crystal display device is provided with: a liquid crystal display panel, which displays the two-dimensional image and the three-dimensional image by selectively switching the images; and a backlight, which supplies light to the liquid crystal display panel. The backlight includes an illuminating region, which is scan-lighted corresponding to scanning of the liquid crystal display panel, and the scanning frequencies of the illuminating region at the time of displaying the two-dimensional image and the three-dimensional image on the liquid crystal display panel are different from each other.

Abstract: Disclosed are a direct-lit LED backlight, and a liquid crystal display device, provided with the backlight. In the LED backlight, heat generated by LEDs is easily dissipated, the number of the LEDs disposed is reduced, the temperature of the LEDs does not become too high, and reliability is improved by stabilizing light emission luminance and service life. The LED backlight (BL1) is provided with: an LED substrate (2), on which a plurality of the LEDs (1) are arranged in a row in the axis line direction; and a base (3), which has a substrate attaching surface (3a) for attaching the LED substrate. The base (3) is attached to a frame (10) such that the axis line direction is in the perpendicular direction, and a flow channel where air flows is provided in the perpendicular direction on the rear side of the substrate attaching surface (3a) of the base (3).

Abstract: An LED backlight in which deterioration in in-plane uniformity of brightness is prevented, whose thickness, frame width, and wire length are reduced, and in which wiring can be carried out easily, includes an LED provided on one surface of an LED substrate; the LED substrate is mounted on a chassis panel so that a surface of the LED substrate opposite to the one surface contacts the chassis panel; and the chassis panel has a connection hole provided in a portion of a region of the chassis panel in which region the LED substrate is mounted, which passes through the chassis panel.

Abstract: An LED backlight in which deterioration in in-plane uniformity of brightness is prevented, whose thickness, frame width, and wire length are reduced, and in which wiring can be carried out easily, includes an LED provided on one surface of an LED substrate; the LED substrate is mounted on a chassis panel so that a surface of the LED substrate opposite to the one surface contacts the chassis panel; and the chassis panel has a connection hole provided in a portion of a region of the chassis panel in which region the LED substrate is mounted, which passes through the chassis panel.

Abstract: A light source device having light guide elements (2a to 2f) and light emitting elements (3a to 3f) for supplying light to each of the light guide elements. The light guide elements each has a wedge-like shape whose thickness is reduced from one end to the other end. The light guide elements are tandem arranged such that the thinner end of a light guide element lies over the thicker end of the other light guide element. Each light guide element has holding sections recessed in the width direction (8a to 8f, 9a to 9f) in its thicker end on which the other light guide element lies. In the light guide device in which the wedge shaped light guide elements are tandem arranged, positional displacement between light guide elements is prevented.

Abstract: An illuminating device (4) includes a light emitting diode substrate (8). A connector (20) is provided at a predetermined position on one end in the longitudinal direction of the light emitting diode substrate (8). Two light emitting diode substrates (8) are adjacent in an arrangement direction, and a plurality of light emitting diodes (18r), (18g), and (18b) included in light emitting diode units (19a) to (19h) in each of the two light emitting diode substrates (8) are provided so as to be symmetrical with respect to a point that is in the center of these two light emitting diode substrates (8).

Abstract: An LED backlight in which deterioration in in-plane uniformity of brightness is prevented, whose thickness, frame width, and wire length are reduced, and in which wiring can be carried out easily, includes an LED provided on one surface of an LED substrate; the LED substrate is mounted on a chassis panel so that a surface of the LED substrate opposite to the one surface contacts the chassis panel; and the chassis panel has a connection hole provided in a portion of a region of the chassis panel in which region the LED substrate is mounted, which passes through the chassis panel.

Abstract: An illumination device (10) comprises: a plurality of substrates (3) each of which has one surface on which a plurality of light sources (5) are provided; a plurality of first reflecting sheets (7), which cover the one surfaces of the respective plurality of substrates (3) so as to leave the plurality of light sources (5) uncovered; a supporting plate (1) which supports the plurality of substrates (3); and a second reflecting sheet (8) which covers an upper surface of the supporting plate (1) in a gap between respective adjacent ones of the plurality of substrate (3). This makes it possible to provide an illumination device capable of irradiating light without luminance non-uniformity.

Abstract: An LED driver circuit which provides a cost reduction is provided by employing a circuit configuration which allows a size reduction. In at least one example embodiment, the LED driver circuit includes a first switching element, a second switching element, a sense resistor, a sensing unit, a calculator, and a driver. The plurality of LEDs, the first switching element, the second switching element, and the sense resistor are coupled to each other in series in this order. The sensing unit receives a voltage at a node between the second switching element and the sense resistor, and generates voltage data representing the voltage. The calculator calculates a temporal average of a current flowing through the LEDs based on the voltage data, and generates current data corresponding to the temporal average. The driver drives the first switching element and the second switching element based on the current data.

Abstract: An LED backlight in which deterioration in in-plane uniformity of brightness is prevented, whose thickness, frame width, and wire length are reduced, and in which wiring can be carried out easily, includes an LED provided on one surface of an LED substrates; the LED substrate is mounted on a chassis panel so that a surface of the LED substrate opposite to the one surface contacts the chassis panel; and the chassis panel has a connection hole provided in a portion of a region of the chassis panel in which region the LED substrate is mounted, which passes through the chassis panel.

Abstract: An illumination device includes an LED package, an LED driver including an FET, and a thermistor disposed on a substrate. A plurality of such LED packages are disposed on the substrate such that a first area and a second area, each determined by vertices corresponding to LED packages, are defined on the substrate. The thermistor is disposed in the first area, and the FET is disposed in the second area, which is outside of the first area. The thermistor detects a temperature in the first area. Such a configuration allows the thermistor to detect, in accordance with the temperature in the area, the temperature of heat transferred from the LED packages, without being affected by heat generated by the FET. This makes it possible to efficiently make temperature corrections to stabilize color temperature and luminance.

Abstract: In order to obtain an LED illuminating device which reduces the wire connection cost by reducing the number of wiring lines and which can also reduce the substrate cost even with a configuration in which the light-emitting surface is formed by combining a plurality of LED unit substrates and in order to obtain a display device which reduces the manufacturing cost by using this LED illuminating device, an LED illuminating device 1 is configured such that a first LED unit substrate 3A having an LED drive circuit section 5 mounted on the substrate and a second LED unit substrate 3B having no LED drive circuit section 5 mounted on the substrate are used in combination and such that the second LED unit substrate 3B is driven via the LED drive circuit section 5 mounted on the first LED unit substrate 3A, and a display device 10 is configured with this LED illuminating device 1 as the backlight.

Abstract: A first power supply voltage Vin1 of a first input section and a second power supply voltage Vin2 of the second input section satisfy an expression Vf(min)?Vin2<Vf(typ)<Vin1?Vf(max). A switching controller alternately electrically connects the first input section or the second input section to LEDs, and based on the difference between an average forward current detected by a detector and a target value of the average forward current, controls the ratio of a period of time for which the first input section is connected to the LEDs to a period of time for which the second input section is connected to the LEDs so that the value of the average forward current approaches the target value.