摘要:
A fluorescent tube is prevented from being wrongly attached and broken when being attached, and luminance nonuniformity of backlight due to luminance difference generated in the tube axis direction of the fluorescent tube is reduced. In a backlight device (2), a plurality of fluorescent tube sets, each of which is composed of four fluorescent tubes (21) having electrodes (211) at the both ends and a pair of lamp holders (5) storing portions close to the both electrodes at the both ends of the four fluorescent tubes (21), and the fluorescent tube sets are driven by a pair of inverter circuit board. The backlight device (2) is provided with a power transmitting member (10), which is connected to electrodes (211) at the ends on one side of the two fluorescent tubes (21), for every two adjacent fluorescent tubes configuring the fluorescent tube set, gathers wirings (9) from the electrodes (211) at the ends and transmits power; and a conduction member (7), which is connected to the electrodes (211) on the other side of the two fluorescent tubes and permits a current to flow between the electrodes at the other ends. In the lamp holder (5), the power transmitting members (10) and the conductive members (7) are alternately arranged.
摘要:
Is disclosed a liquid crystal display device in which a lamp chamber and a liquid crystal display panel chamber partitioned by a light diffusion plate communicate with each other and further with the ambient air through vents to prevent the occurrence of deformation of the light diffusion plate. The liquid crystal display device is provided with a shield portion (1) with a reflecting sheet (6) placed thereon for reflecting light generated from lamps (5) accommodated therein, a light diffusion plate (2) and/or an optical sheet (3), wherein the light diffusion plate (2) an/or the optical sheet (3) are provided each in a marginal portion with at least a vent (2a, 3a) and the shield portion is also provided in its marginal portion corresponding to the vents (2a, 3a) with a vent (1a) open to the ambient air. An air passage through the vents (2a, 3a) communicating the lamp chamber (30) accommodating the lamps with the LCD panel chamber (31) containing the LCD panel and communicating through the vent (1a) with the ambient air is thus formed inside the LCD device.
摘要:
A driving apparatus and a driving method are disclosed that are capable of uniformly lighting each entire fluorescent tube irrespective of the length or number of fluorescent tubes when simultaneously driving a plurality of fluorescent tubes in a fluorescent tube lighting apparatus. When two inverter circuits having respective transformers are provided at both ends of a fluorescent tube to light the fluorescent tube by push-pull driving, feedback windings of transformers not used in self-excited oscillation of each inverter circuit are connected together, with the transformer connection that connects together the feedback windings being either in-phase or in opposite phase, and the method of connection for fluorescent tubes connecting to secondary windings of each transformer can be changed in accordance with that connection method.
摘要:
A lighting apparatus (12) has a plurality of tubular light sources (17) arranged in parallel and a light reflective member (40) arranged at the opposite side of the light emission side of the tubular light sources. Arrangement of the tubular light sources is configured to have narrow interval sections (17A) with relatively narrow-spaced arrangement intervals and wide interval sections (17B) with relatively wide-spaced arrangement intervals. On the light reflective member, openings (50) are formed such that an aperture ratio equivalent to a formation ratio of the openings (50) to a whole area of the light reflective member (40) becomes greater in the narrow interval sections (17A) than in the wide interval sections (17B). The lighting apparatus is characterized by such a configuration.
摘要:
A fluorescent tube is prevented from being wrongly attached and broken when being attached, and luminance nonuniformity of backlight due to luminance difference generated in a tube axis direction of the fluorescent tube is reduced. A backlight device 2 is provided with a plurality of fluorescent tubes 21 having electrodes 211 at both ends; a bundling member 213 for bundling wirings 212 pulled out from the electrode 211 on one side of two or more of the fluorescent tubes 21; and a conducting means 31 for achieving conduction between the electrodes of the two fluorescent tubes among the fluorescent tubes 21 by being connected with the bundling member 213. The conducting means 31 permits a current to be carried between the electrodes of the two fluorescent tubes 21, which are bundled by the one bundling member 213, and the conducting means are arranged on inverter circuit substrate 28, respectively, not to be adjacent to each other.
摘要:
In order to control light emission of light emitting diodes, current dividing circuits are used to supply currents of a substantially fixed level to all lines. Light emitting diodes are arranged in groups of a predetermined number of LEDs in series, and sets of the light emitting diodes connected to the first line and sets of the light emitting diodes connected to the second line are laid out on the same straight line so as to form a single row. Substrates with these formed thereon are arranged adjacent to each other in the direction of the rows, so that sets of the light emitting diodes connected to the first line and sets of the light emitting diodes connected to the second line are arranged alternately. With this configuration, it is possible to provide a backlight device with a plurality of LED arrays arranged thereon, which can uniformly illuminate the entire screen with light from the LED arrays.
摘要:
A flat panel display apparatus is provided which is capable of conducting a transition of a display unit between the landscape and portrait orientation at one step and rotating around the substantial central portion of said display unit. The flat panel display apparatus includes a thin flat display unit (1) having a rectangular shape display screen thereon; a stand unit (2) for supporting said display unit (1); and a horizontal rotary axis (3) which is secured to the display unit (1) on its rear side in the substantial center thereof and which holds said display unit (1) so that display unit (1) is rotatable by at least 90 relative to said stand unit (2) and is characterized in that said display apparatus is provided with translational motion means (21, 22, 23) which causes the translational motion of said display unit (1) in a vertical direction in an interlocking manner with the rotation of said horizontal rotary axis (3).