Abstract: A method of lighting a high-pressure discharge lamp is configured to change a power to be supplied to the high-pressure discharge lamp in accordance with a luminance parameter of an image content. The method includes switching between a low temperature operation and a high temperature operation so as to maintain a condition that mercury encapsulated into an arc tube part of the high-pressure discharge lamp constantly partially deposits without evaporating. The low temperature operation is performed where the temperature in the arc tube part is less than or equal to the deposition temperature of the mercury, whereas the high temperature operation is performed where the temperature in the arc tube part is greater than the deposition temperature of the mercury.

Abstract: A method of lighting a high-pressure discharge lamp is configured to change a power to be supplied to the high-pressure discharge lamp in accordance with a luminance parameter of an image content. The method includes switching between a low temperature operation and a high temperature operation so as to maintain a condition that mercury encapsulated into an arc tube part of the high-pressure discharge lamp constantly partially deposits without evaporating. The low temperature operation is performed where the temperature in the arc tube part is less than or equal to the deposition temperature of the mercury, whereas the high temperature operation is performed where the temperature in the arc tube part is greater than the deposition temperature of the mercury.

Abstract: The backlight unit 12 includes cold cathode tubes 18, a chassis 14, inverter boards 20, relay connectors 21, and covers 22. The chassis 14 houses the cold cathode tubes 18. The inverter boards 20 are arranged on a side of the chassis 14 opposite from the cold cathode tubes 18. The inverter boards 20 are configured to supply drive power to the cold cathode tubes 18. The relay connectors 21 are mounted to the chassis 14. The inverter boards 20 are connected to or disconnected from the relay connectors 21 in one direction along board surfaces thereof (the X-axis direction). The relay connectors 21 are configured to relay power from the inverter boards 20 to the cold cathode tubes 18. The covers 22 are arranged between the chassis 14 and the inverter boards 20. Each cover 22 includes a movable portion 22b attached to the chassis 14 so as to be movable along the connecting direction and the disconnecting direction of the inverter board 20 to the relay connectors 21 (the X-axis direction).

Abstract: A lighting unit 12 of the present invention includes a light source 17, a chassis that covers the light source 17 and a vibration absorber 70 provided in a mat-like form and arranged between the light source 17 and the chassis 14. The vibration absorber 70 is made of gelatinous material. With this configuration, the vibration absorber 70 blocks vibration propagation from the light source 17 to the chassis 14. As a result, a roaring sound is properly eliminated or reduced.

Abstract: An inverter unit protective cover for a lighting device configured to enhance versatility with low cost is provided. An inverter unit protective cover for a lighting device according to the present invention is an inverter unit protective cover for a lighting device protecting an inverter unit attached to the lighting device in which a plurality of light sources is housed in a chassis and includes a cover main body including a ceiling portion covering a side of the inverter unit away from the chassis and a circumferential wall portion covering a circumference of the inverter unit. The cover main body is formed in a sheet shape and made of an insulating material. The cover main body has a folding guide line at a border between the ceiling portion and the circumferential wall portion.

Abstract: There is provided a backlight device with which it is possible not only to prevent an assembly process from being complicated and the number of components from being increased, but also to connect a light source to a connector member satisfactorily and electrically. In this backlight device (20), a distance (W12) from the central axis (O1) of a cold cathode fluorescent lamp (23) to a connector terminal portion (240) is larger than a distance (W2) from the central axis of the cold cathode fluorescent lamp to an end portion of a contact portion (23d) of a cap portion (23a) in an F direction but is smaller than a distance (L2) from the central axis of the cold cathode fluorescent lamp to an end portion of the contact portion of the cap portion in an E direction.

Abstract: A lighting device for a display device includes a plurality of linear light sources and a light source holding member arranged to hold the linear light sources. The light source holding member includes a first member and a second member. A sliding mechanism is provided between the first member and the second member, so as to allow parallel displacement of the first member and the second member relative to each other. The first member includes a first light source holder arranged to directly hold a first linear light source of the plurality of linear light sources. The second member includes a second light source holder arranged to directly hold a second linear light source other than the first linear light source.

Abstract: A backlight unit includes a discharge tube, a backlight chassis and a reinforcing member. The backlight chassis includes a bottom plate and side plates that rise from a surface of the bottom plate at the respective edges of the bottom plate. The backlight chassis houses the discharge tube that is arranged on the first surface of the bottom plate. The reinforcing member includes fixing portions that is fixed to the respective side plates and a reinforcing portion that is in contact with a rear surface of the bottom plate of the backlight chassis and connected to the fixing portions.

Abstract: A backlight unit includes a discharge tube, a plate, a vibration absorber for absorbing vibrations, and a backlight chassis. The backlight chassis includes a bottom plate and side plates that rise from a surface of the bottom plate at the respective edges of the bottom plate. The backlight chassis houses the vibration absorber, the plate, and the discharge tube arranged in this sequence from the surface of the bottom plate. The plate is in contact with the vibration absorber.

Abstract: A backlight unit 12 includes LEDs 16, a first light guide plate 18A, a second light guide plate 18B and a fitting structure. Each of the first light guide plate 18A and the second light guide plate 18B has a light entrance surface 34 and a light exit surface 36. The light entrance surface 34 faces the corresponding LED 16 and light from the LED 16 enters through the light entrance surface 34. The light exit surface 36 through which light exits is arranged along an arrangement direction in which the LED 16 and the light entrance surface 34 are arranged. The light guide plates 18 are arranged in a parallel layout in the arrangement direction and partially overlap in a direction perpendicular to the light exit surface 36. A light exit portion 31 is an overlapping area OA that is provided on the first light guide plate 18A on a relatively light output side.

Abstract: In a lighting device, it is controlled whether or not to exit light for every small area of a light guide member and good operability is obtained for installation of the light guide member. Uneven brightness is less likely to occur. A backlight unit 12 includes LEDs 17 as light sources, a light guide member 19 having a light entrance surface 19b which light from the LEDs 17 enters and a light exit surface 19a from which light exits, and a groove portion 22 formed on a surface of the guide member 19 opposite to the exit surface 19a so as to divide the exit surface 19a into areas A in a plan view. The LEDs 17 are arranged corresponding to each area A and the groove portion 22 includes an LED housing groove portion 22A housing at least one of the LEDs 17 therein and having an inner surface that is the entrance surface 19b.

Abstract: An optical member 16 capable of light transmission and having a sheet-shape is installed in a chassis 13 of a backlight device 10 around an opening of the chassis 13. A cold cathode tube 15 capable of emitting light and having a substantially circle cross-section is installed behind the optical member 16 inside the chassis 13. A reflecting sheet 14 that reflects light emitted from the cold cathode tube 15 is installed behind the cold cathode tube 15 inside the chassis 13. The reflecting sheet 14 has a concave portion that surrounds the cold cathode tube 15 from the rear. The reflecting sheet 14 has an arch surface 26 at least in an area that faces the cold cathode tube 15 in a direction perpendicular to the surface of the optical member 16. The arch surface 26 is formed in a concentric manner as the cold cathode tube 15.

Abstract: The backlight unit 12 includes cold cathode tubes 18, a chassis 14, inverter boards 20, relay connectors 21, and covers 22. The chassis 14 houses the cold cathode tubes 18. The inverter boards 20 are arranged on a side of the chassis 14 opposite from the cold cathode tubes 19. The inverter boards 20 are configured to supply drive power to the cold cathode tubes 18. The relay connectors 21 are mounted to the chassis 14 such that the inverter boards 20 are connected thereto so as to be removal therefrom in one of the directions along a board surface of the inverter board 20. The relay connectors 21 are configured to relay power from the inverter boards 20 to the cold cathode tubes 18. The covers 22 are made of material having a lower strength than the chassis 14 and arranged between the chassis 14 and the inverter boards 20. The chassis 14 has receiving portions 35 that project toward the inverter boards 20 and receive the inverter boards 20.

Abstract: A lighting device for a display device includes a light source and a chassis arranged to cover the light source. The chassis includes a base member made of resin material, and further includes a metallic skeleton frame provided on the base member. Thus, the lighting device for a display device having a simple construction capable of preventing or suppressing beat tones generated on a lamp housing member is provided without increasing the thickness of the device.

Abstract: A backlight unit includes hot cathode tubes; a chassis 14 housing the hot cathode tube therein and from which light from the hot cathode tube exits; a diffuser plate; and a reflection sheet 20 facing the diffuser plate in the chassis 14. The hot cathode tubes include at least a first hot cathode tube relatively close to the diffuser plate and a second hot cathode tube relatively far from the diffuser plate. A distance between the first hot cathode tube and the diffuser plate is different from a distance between the second hot cathode tube and the diffuser plate. The backlight unit further includes a directional reflection surface provided on a portion of the reflection member that does not overlap at least the second hot cathode tube, and the directional reflection surface faces toward a portion of the diffuser plate overlapping with the second hot cathode tube.

Abstract: A lighting device according to the present invention includes a hot cathode tube 17, a chassis 14 storing the hot cathode tube 17 therein, and a heat radiating mechanism 40 configured to come in contact with the hot cathode tube 17 and radiate heat of the hot cathode tube 17. The heat radiating mechanism 40 has a heat radiating sheet 43 configured to contact with the hot cathode tube 17, and a displacing part 42 displacing the heat radiating sheet 43 between a contact position where the heat radiating sheet is in contact with the hot cathode tube 17 and a non-contact position where the heat radiating sheet 43 is not in contact with the hot cathode tube 17. The displacing part 42 displaces the heat radiating sheet 43 to the non-contact position at a temperature that is lower than a predetermined temperature and to the contact position at a temperature that is higher than the predetermined temperature.

Abstract: A lighting device for a display device, includes a light source and a chassis arranged to cover the light source. The chassis is defined by a plate-shaped member having a reticulated structure. Thus, the lighting device for a display device, capable of preventing or suppressing beat tones generated on a lamp housing member, is provided without increasing the thickness of the device and with a simple structure.

Abstract: The backlight unit 12 includes cold cathode tubes 18, a chassis 14, inverter boards 20, relay connectors 21, and covers 22. The chassis 14 houses the cold cathode tubes 18. The inverter boards 20 are arranged on a side of the chassis 14 opposite from the cold cathode tubes 19. The inverter boards 20 are configured to supply drive power to the cold cathode tubes 18. The relay connectors 21 are mounted to the chassis 14 such that the inverter boards 20 are connected thereto so as to be removal therefrom in one of the directions along a board surface of the inverter board 20. The relay connectors 21 are configured to relay power from the inverter boards 20 to the cold cathode tubes 18. The covers 22 are made of material having a lower strength than the chassis 14 and arranged between the chassis 14 and the inverter boards 20. The chassis 14 has receiving portions 35 that project toward the inverter boards 20 and receive the inverter boards 20.

Abstract: The backlight unit 12 includes cold cathode tubes 18, a chassis 14, inverter boards 20, relay connectors 21, and covers 22. The chassis 14 houses the cold cathode tubes 18. The inverter boards 20 are arranged on a side of the chassis 14 opposite from the cold cathode tubes 18. The inverter boards 20 are configured to supply drive power to the cold cathode tubes 18. The relay connectors 21 are mounted to the chassis 14. The inverter boards 20 are connected to or disconnected from the relay connectors 21 in one direction along board surfaces thereof (the X-axis direction). The relay connectors 21 are configured to relay power from the inverter boards 20 to the cold cathode tubes 18. The covers 22 are arranged between the chassis 14 and the inverter boards 20. Each cover 22 includes a movable portion 22b attached to the chassis 14 so as to be movable along the connecting direction and the disconnecting direction of the inverter board 20 to the relay connectors 21 (the X-axis direction).

Abstract: A lighting device for a display device includes a light source, an optical member arranged on the light emitting side of the light source, and a support member arranged to support the optical member from the light source side. A recess portion arranged to accommodate the distal end portion of the support member is provided in the surface of the optical member that faces the light source, and the recess portion is arranged to overlap with the support member when seen in a planar view.