WO2012137757A1

WO2012137757A1 - Illumination device, display device, and television receiver device

Info

Publication number: WO2012137757A1
Application number: PCT/JP2012/059036
Authority: WO
Inventors: 真之助野澤
Original assignee: シャープ株式会社
Priority date: 2011-04-06
Filing date: 2012-04-03
Publication date: 2012-10-11

Abstract

This illumination device comprises: a light source unit including a main light source (20) that irradiates an irradiation object (11), a light source substrate (25) having the main light source (20) mounted on one surface (26) thereof, and an auxiliary light source (21) mounted on the other surface (27) of the light source substrate (25); and a chassis (14) that houses the light source unit. The auxiliary light source (21) is mounted at a position that overlaps the mounting position of the main light source (20) across the light source substrate (25). With this construction, there is no need to provide a dedicated light source substrate (25) for the auxiliary light source (21), and the number of parts can be reduced.

Description

Lighting device, display device, and television receiver

The present invention relates to a lighting device, a display device, and a television receiver.

For example, since a liquid crystal panel used in a liquid crystal display device such as a liquid crystal television does not emit light, a backlight device is required as a separate lighting device. The backlight device is installed on the back surface opposite to the display surface of the liquid crystal panel. For example, a chassis having an open surface on the liquid crystal panel side, a light source housed in the chassis, an opening of the chassis, and a light source And an optical member for efficiently emitting the light to the liquid crystal panel side. Moreover, LED is used suitably as a light source.

By the way, in a television receiver provided with such a backlight device, so-called ambient light technology that performs indirect illumination by illuminating the back wall or the like on which the television receiver is installed with a color that matches the image to be displayed. The thing of patent document 1 is known as what uses this.

In this case, in addition to the light source for supplying light to the liquid crystal panel, an indirect illumination light for illuminating a wall or the like is provided along the outer peripheral surface of the liquid crystal display device. Red (R), green (G), and blue (B) LEDs are used as the indirect illumination light, and the brightness and color temperature are controlled based on output signals from the image conversion circuit. Thus, it is realized by an LED driving circuit for indirect illumination different from the LED driving circuit for backlight.

JP 2009-122367 A

(Problems to be solved by the invention)
However, according to such a configuration, the LED for indirect illumination and the accompanying LED substrate and fixing member must be arranged in the television receiver separately from the LED for backlight, and the number of parts increases. As the number of assembly steps increases, there is a concern about an increase in manufacturing cost. For this reason, cost reduction is required by reducing the number of parts and improving the assemblability.

The present invention has been completed based on the above circumstances, and an object thereof is to provide a lighting device capable of reducing costs.

(Means for solving problems)
The present invention comprises a light source unit comprising: a main light source that irradiates an irradiated object; a light source substrate on which the main light source is mounted on one surface; and a sub-light source mounted on the other surface of the light source substrate; And a chassis that houses the light source unit.

With such a configuration, in the illumination device configured to irradiate a target different from the main light source that irradiates the irradiated object with the sub light source, the sub surface is mounted on the other surface of the light source substrate on which the main light source is mounted. By mounting the light source, it is not necessary to provide a light source substrate for the sub light source, and the number of components can be reduced as compared with the case where the main light source and the sub light source are mounted on separate light source substrates. Further, since the number of parts can be reduced, the number of steps in the assembly process can be reduced, and as a result, the cost can be reduced.

The following configuration is preferable as an embodiment of the present invention.
(1) The sub-light source is mounted at a position overlapping the mounting position of the main light source via the light source substrate.

With such a configuration, the auxiliary light source can be mounted on the back surface of the mounting surface on which the main light source of the light source substrate is mounted without increasing the surface area of the light source substrate for the main light source. Space can be saved. In addition, when the drive circuits for the main light source and the sub light source are concentrated in one place, the wiring pattern from each light source can be shortened and path heat generation can be suppressed.

(2) The chassis includes a bottom plate and a side plate rising from the bottom plate, and a main opening that emits light from the main light source is formed by an open end of the side plate. The secondary light source side mounting surface on which the secondary light source is mounted is disposed so as to face the bottom plate or the side plate of the chassis, and the secondary plate is placed on the bottom plate or the side plate of the chassis facing the secondary light source side mounting surface. A sub-opening for emitting light from the light source is formed.

With such a configuration, the sub-light source side mounting surface is arranged so as to face the bottom plate or side plate of the chassis, and the sub-opening portion is provided in the facing portion. It can be directly arranged, and light from the sub-light source can be emitted directly from the sub-opening. With such a simple configuration, further cost reduction can be expected.

(3) The said sub light source consists of two or more, and the said sub opening part is provided for every said sub light source. With such a configuration, it is possible to assemble the light source substrate on which the sub-light source is mounted so as to correspond to the sub-opening, so that it is excellent in assemblability or can prevent erroneous assembly.

(4) The main light source and the sub light source are LEDs. If the LED is used as the main light source and the sub light source, it is possible to adjust the luminance to the irradiated object according to the number of mounted LEDs. For example, compared to the case where a linear light source such as a discharge tube is used, the irradiation range is used It can respond flexibly according to the application. Further, the life of the light source can be extended and the power consumption can be reduced.

(5) The sub-light source is a multicolor LED. With such a configuration, for example, in the case of indirect illumination using light from the sub-light source as it is, it is possible to irradiate multicolor light without passing through a color filter as in a liquid crystal panel. Therefore, space production can be easily performed.

(6) In order to solve the above-described problem, a display device according to the present invention includes the above-described illumination device and a display panel as the irradiated body that performs display using light from the main light source of the illumination device. With. According to such a display device, since the auxiliary light source is provided separately from the main light source for illuminating the display panel, not only as a display device for displaying an image on the display panel, but also for example illuminating a wall around the display panel. It can be used as indirect lighting. Further, in the illumination device that constitutes the display device, since one light source substrate serves both as a main light source and a sub light source, the number of parts can be reduced. Further, since the number of parts can be reduced, the number of steps in the assembly process can be reduced, and as a result, the cost can be reduced.

(7) It is possible to accommodate the illumination device and the display panel inside, and an exterior member having a slit for emitting light from the sub-light source. According to such a configuration, the light from the sub-light source can be emitted from the slit, and the emission direction and irradiation range can be adjusted by the shape of the slit.

(8) The slit is formed on the back surface opposite to the display surface of the display panel or on the peripheral surface of the display surface. According to such a configuration, by arranging the display device on the indoor wall side, for example, the light from the secondary light source emitted from the slit opened on the back surface or the peripheral surface is irradiated on the adjacent wall or the like, so that indirect illumination is performed. Can be used as

In addition, the case where a slit is provided on the back surface opposite to the display surface of the display panel will be described. Since the display device is usually installed along the wall side in the room, the slit is provided so as to face this wall. Therefore, it is possible to make the slit itself and the sub-light source disposed in the slit difficult to be visually recognized by the user, and it is possible to improve the aesthetic appearance.

Also, by arranging the slits in accordance with the arrangement of the light sources, it is possible to reduce the number of parts and thus reduce the cost. That is, when a so-called direct illumination device in which the mounting surface of the main light source faces the display surface of the display panel is used and the sub-light source is mounted on the surface opposite to the main light source of the light source substrate, the slit is provided on the back side. Then, the light from the auxiliary light source can be emitted directly from the slit without arranging a light guide member or the like. In addition, when using a so-called edge light type illumination device in which the mounting surface of the main light source is arranged along the peripheral surface of the chassis, and mounting the sub light source on the surface opposite to the main light source of the light source substrate, the slit is formed. If provided on the peripheral surface side, the light from the auxiliary light source can be emitted directly from the slit. Therefore, it is possible to reduce costs by reducing the number of parts such as the light guide member.

(9) The slit is closed by a translucent sheet member from the inside of the exterior member. With such a configuration, at least dust or the like can be prevented from entering the interior of the exterior member from the slit.

(10) An optical member is disposed on the auxiliary light source side of the slit. That is, the above-described sheet member itself may be an optical member, or only the optical member may be provided separately from the sheet member. As described above, if the optical member is disposed on the side of the sub-light source that is inside the exterior member with respect to the slit, the light from the sub-light source can be modulated by the optical member.

(11) The display panel displays an image based on an input image signal, and driving of the sub-light source is controlled based on the input image signal. With such a configuration, the lighting and color of the secondary light source are controlled in accordance with the image to be displayed on the display panel, and a space effect that makes the display image appear larger than the original size can be realized.

A liquid crystal panel can be exemplified as the display panel. Such a display device can be applied as a liquid crystal display device to various uses such as a display of a television or a personal computer, and is particularly suitable for a large screen.

(The invention's effect)
ADVANTAGE OF THE INVENTION According to this invention, the illuminating device which can reduce cost can be provided.

1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1 of the present invention. Rear view of TV receiver Exploded perspective view showing schematic configuration of liquid crystal display device Sectional drawing which shows the cross-sectional structure along the short side direction of a television receiver Sectional drawing which shows the cross-sectional structure along the long side direction of a television receiver The block diagram which shows roughly the electric structure in a television receiver The principal part expanded sectional view which shows the cross-sectional structure along the short side direction of the television receiver which concerns on the modification 1 of Embodiment 1. FIG. The principal part expanded sectional view which shows the cross-sectional structure along the short side direction of the television receiver which concerns on the modification 2 of Embodiment 1. FIG. The principal part expanded sectional view which shows the cross-sectional structure along the short side direction of the television receiver which concerns on the modification 3 of Embodiment 1. FIG. FIG. 6 is an exploded perspective view showing a schematic configuration of a liquid crystal display device according to Embodiment 2. The principal part expanded sectional view which shows the cross-sectional structure along the short side direction of a television receiver The top view which shows the arrangement structure seen from the front side of the backlight apparatus FIG. 6 is an exploded perspective view showing a schematic configuration of a liquid crystal display device according to Modification 1 of Embodiment 2. Sectional drawing which shows the cross-sectional structure along the long side direction of a television receiver FIG. 6 is an exploded perspective view illustrating a schematic configuration of a liquid crystal display device according to a second modification of the second embodiment. Sectional drawing which shows the cross-sectional structure along the short side direction of a television receiver Sectional drawing which shows the cross-sectional structure along the long side direction of a television receiver FIG. 6 is an exploded perspective view showing a schematic configuration of a liquid crystal display device according to Modification 3 of Embodiment 2. Sectional drawing which shows the cross-sectional structure along the short side direction of a television receiver

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, the liquid crystal display device 10 is illustrated. In addition, a part of each drawing shows an X axis, a Y axis, and a Z axis, and each axis direction is drawn to be a direction shown in each drawing. Moreover, let the upper side shown in FIG. 3 be a front side, and let the lower side of the figure be a back side.

As shown in FIG. 1, the television receiver TV according to the present embodiment includes a liquid crystal display device 10 that is a display device, and front and back cabinets (exterior members) 30 and 31 that are accommodated so as to sandwich the liquid crystal display device 10. Power supply circuit board P for power supply, a tuner (receiving unit) T capable of receiving a TV image signal, and image conversion for converting the TV image signal output from the tuner T into an image signal for the liquid crystal display device 10 A circuit board VC and a stand S are provided. The liquid crystal display device 10 has a horizontally long (longitudinal) rectangular shape (rectangular shape) as a whole, the long side direction is the horizontal direction (X-axis direction), and the short side direction is the vertical direction (Y-axis direction, vertical direction). They are housed in a state of almost matching each other.

The front cabinet 30 is made of synthetic resin, has a function of covering the front side of the liquid crystal display device 10, and is provided with a display opening 30a for exposing the display surface 11a of the liquid crystal panel 11 to the outside of the front side. On the other hand, the back cabinet 31 is also made of synthetic resin, and, as shown in FIGS. 1 and 2, covers the back side of the liquid crystal display device 10 and has a shallow box shape that opens to the front side and becomes the bottom of the box. A plurality of slits 32 for individually emitting light from each backside LED 21 described later are formed on the back surface 31a. The configuration of the slit 32 will be described in detail later.

As shown in FIG. 3, the liquid crystal display device 10 includes a liquid crystal panel 11 that is a display panel and a backlight device (illumination device) 12 that is an external light source, which are integrally formed by a frame-like bezel 13 or the like. It is supposed to be retained. Hereinafter, each member constituting the liquid crystal display device 10 will be described in detail.

First, as shown in FIG. 3, the liquid crystal panel 11 has a rectangular shape in plan view, and a pair of glass substrates are bonded together with a predetermined gap therebetween, and liquid crystal is sealed between the glass substrates. The configuration is One glass substrate is provided with a switching element (for example, TFT) connected to a source wiring and a gate wiring orthogonal to each other, a pixel electrode connected to the switching element, an alignment film, and the like. The substrate is provided with a color filter and counter electrodes in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, and an alignment film. A polarizing plate (not shown) is disposed outside both substrates.

The driving of the liquid crystal panel 11 is controlled by the liquid crystal panel control unit 42 as shown in FIG. The liquid crystal panel control unit 42 receives the output signal output from the image signal processing unit 41, outputs a control signal toward the liquid crystal panel 11, and controls driving of the liquid crystal panel 11. As will be described in detail later, a control signal output from the LED control unit 43 in synchronization with the control signal from the liquid crystal panel control unit 42 is input to the LED 20 for the liquid crystal panel, etc. The light supplied from the display and the display screen displayed on the display unit 11a of the liquid crystal panel 11 can be synchronized to display a desired image. The image signal processing unit 41 receives a television image signal input to the tuner T via the antenna 40. The image signal processing unit 41 performs image processing on the input signal and outputs the processed signal to the liquid crystal panel. It can be output to the control unit 42 and the like.

As shown in FIG. 3, the backlight device 12 covers a substantially box-shaped chassis 14 having an opening on the light emitting surface side (the liquid crystal panel 11 side) and a main opening 14 b of the chassis 14. The optical member 15 group is provided, and the frame 16 is provided along the outer edge portion of the chassis 14 and holds the outer edge portion of the optical member 15 group between the chassis 14 and the frame 16. Further, in the chassis 14, a liquid crystal panel LED (main light source) 20 and a back surface LED (sub light source) 21 that are arranged opposite to each other at a position directly below the optical member 15 (liquid crystal panel 11) are provided. An LED unit (light source unit) mounted on the substrate 25 is provided. Thus, the backlight device 12 according to the present embodiment is a so-called direct type. In addition, the chassis 14 is provided with a reflection sheet 17 that reflects the light in the chassis 14 toward the optical member 15.

The chassis 14 is made of metal. As shown in FIGS. 3 to 5, the chassis 14 has a horizontally long bottom (rectangular, rectangular) as in the liquid crystal panel 11, and each side (a pair of bottom plates 14a). It consists of a side plate 14c rising from the outer end of the long side and a pair of short sides toward the front side (light emitting side), and a receiving plate 14d projecting outward from the rising end of each side plate 14c. It has a shallow box shape (substantially a shallow dish) that opens toward the top. The long side direction of the chassis 14 coincides with the X-axis direction (horizontal direction), and the short side direction coincides with the Y-axis direction (vertical direction). A frame 16 and an optical member 15 to be described below can be placed on each receiving plate 14d in the chassis 14 from the front side, and the frame 16 is screwed to each receiving plate 14d. A sub-opening 14 e is formed in the bottom plate 14 a of the chassis 14. The LED board 25 to be described later is fixed on the bottom plate 14a by a holding member or the like. At this time, the back surface LED 21 mounted on the back side mounting surface 27 of the LED board 25 facing the bottom plate 14a is in the sub-opening 14e. By being fitted, it is possible to fix the back surface side mounting surface 27 so as to overlap the bottom plate 14a.

As shown in FIG. 3, the optical member 15 has a horizontally long rectangular shape when viewed in a plane, like the liquid crystal panel 11 and the chassis 14. As shown in FIGS. 4 and 5, the optical member 15 has its outer edge portion placed on the receiving plate 14d, thereby covering the main opening 14b of the chassis 14, and the liquid crystal panel 11 and the liquid crystal panel LED 20 (LED substrate). 25). The optical member 15 includes a diffusion plate 15a disposed on the back side (LED 20 for liquid crystal panel, opposite to the light emitting side) and an optical sheet 15b disposed on the front side (liquid crystal panel 11 side, light emitting side). Composed. The diffusing plate 15a has a structure in which a large number of diffusing particles are dispersed in a substantially transparent resin-made base material having a predetermined thickness, and has a function of diffusing transmitted light. The optical sheet 15b has a sheet shape that is thinner than the diffusion plate 15a, and two optical sheets 15b are laminated. Specific types of the optical sheet 15b include, for example, a diffusion sheet, a lens sheet, a reflective polarizing sheet, and the like, which can be appropriately selected and used.

As shown in FIG. 3, the frame 16 has a frame shape along the outer peripheral edge portions of the liquid crystal panel 11 and the optical member 15. The outer edge portion of the optical member 15 can be sandwiched between the frame 16 and the receiving plate 14d of the chassis 14 (see FIGS. 4 and 5). The frame 16 can receive the outer edge portion of the liquid crystal panel 11 from the back side, and can sandwich the outer edge portion of the liquid crystal panel 11 with the bezel 13 disposed on the front side (FIGS. 4 and 5). reference).

The reflection sheet 17 is made of a synthetic resin, and the surface thereof is white with excellent light reflectivity. As shown in FIGS. 4 and 5, the reflection sheet 17 has a size that is laid over almost the entire inner surface of the chassis 14, so that the LED substrate 25 disposed on the bottom plate 14 a of the chassis 14 is placed on the front side. It is possible to cover from all together. The reflection sheet 17 can efficiently raise the light in the chassis 14 toward the optical member 15 side. The reflection sheet 17 extends along the bottom plate 14a of the chassis 14 and covers a large portion of the bottom plate 14a. The reflection sheet 17 rises from each outer end of the bottom portion 17a to the front side and is inclined with respect to the bottom portion 17a. The four rising portions 17b and the extending portions 17c extending outward from the outer ends of the rising portions 17b and mounted on the receiving plate 14d of the chassis 14 are configured. The bottom 17a of the reflection sheet 17 is arranged so as to overlap the front side of each LED substrate 25, that is, the liquid crystal panel side mounting surface 26 that is the mounting surface of the LED 20 for liquid crystal panel. In addition, a plurality of LED insertion holes 17 d through which the respective liquid crystal panel LEDs 20 can be inserted individually are formed in the bottom portion 17 a of the reflection sheet 17 so as to overlap with the respective liquid crystal panel LEDs 20 in plan view.

Next, the LED unit will be described. The LED unit includes a liquid crystal panel LED 20, a back LED 21, and an LED substrate 25 on which these are mounted. First, as shown in FIGS. 4 and 5, the liquid crystal panel LED 20 is mounted on the LED substrate 25 and a surface opposite to the mounting surface of the liquid crystal panel LED 20 is a light emitting surface. Is done. The LED for liquid crystal panel 20 includes an LED chip that emits blue light as a light source, and includes a green phosphor and a red phosphor as phosphors that emit light when excited by blue light. Liquid crystal panel by blue light (blue component light) emitted from the LED chip, green light (green component light) emitted from the green phosphor, and red light (red component light) emitted from the red phosphor The LED 20 can emit light of a predetermined color as a whole, for example, white or blueish white.

The rear LED 21 is a top type in which the surface opposite to the mounting surface is the light emitting surface. Here, as each backside LED 21, three types of LED chips that emit red, green, and blue light in a single color are stored in one package. For example, the voltage value of the input signal is changed. Thus, each LED chip in the package is controlled to be lit according to the voltage value, so that multi-color light emission is possible depending on the combination of the lighting.

These

LEDs

20 and 21 are mounted on both sides on one LED substrate 25. As shown in FIGS. 3 to 5, the LED substrate 25 is a two-layer substrate having a rectangular shape in plan view, and the chassis has a long side direction that matches the X-axis direction and a short side direction that matches the Y-axis direction. 14 is accommodated while extending along the bottom plate 14a.

Among the plate surfaces of the LED substrate 25, the plate surface facing the front side (the surface facing the optical member 15 side) is a liquid crystal panel mounting surface 26, and the liquid crystal panel LED 20 is surface-mounted. The mounted LED 20 for a liquid crystal panel has a light emitting surface facing the optical member 15 (the liquid crystal panel 11) and an optical axis that coincides with the Z-axis direction, that is, the direction orthogonal to the display surface of the liquid crystal panel 11. ing. A plurality of liquid crystal panel LEDs 20 are mounted on the liquid crystal panel mounting surface 26 in a matrix along the long side direction (X-axis direction) and the short side direction (Y-axis direction).

Among the plate surfaces of the LED substrate 25, the plate surface facing the back side (the surface facing the bottom plate 14a side of the chassis 14) is a back surface mounting surface 27, and the back surface LED 21 is surface mounted. The mounted rear LED 21 is inserted into the sub-opening 14e formed in the bottom plate 14a of the chassis 14, and the light emitting surface is exposed to the outside of the television receiver TV through the slit 32 formed in the back cabinet 31. . The optical axis is the Z-axis direction, which is opposite to the optical axis of the liquid crystal panel LED 20.

As shown in FIG. 2, the sub-opening 14 e and the slit 32 into which the rear-side LED 21 is inserted are arranged in a straight line along the circumferential surface excluding the lower end portion of the rear surface 31 a of the back-side cabinet 31. It is formed at intervals. The opening shape is exemplified by a square shape, but may be a rectangular shape or a round shape. The sub-opening 14e and the slit 32 only need to play a role of emitting light from the backside LED 21 in a desired direction, and the shape thereof is not limited to the above description.

Now, the rear LEDs 21 corresponding to the sub-openings 14e and the slits 32 are mounted on the LED substrate 25 as follows. That is, the back side LED 21 is mounted on the back side mounting surface 27 of the LED substrate 25 in series along the short side direction (Y-axis direction) at both ends of the long side direction (X-axis direction). The rear LEDs 21 are mounted in series along the long side direction only on the upper side at both ends in the direction. Note that the rear LED 21 is mounted on the LED substrate 25 so as to have a positional relationship overlapping the liquid crystal panel LED 20 in plan view.

The base material of the LED substrate 25 is made of the same metal as the chassis 14 such as an aluminum material, and a wiring pattern (not shown) made of a metal film such as a copper foil via an insulating layer on both surfaces. And various circuits to which the terminals of the

LEDs

20 and 21 are connected are formed by this wiring pattern. More specifically, an LED controller 43 is connected to the wiring pattern formed on the liquid crystal panel side mounting surface 26 and connected to the terminals of the liquid crystal panel LED 20 as shown in FIG. Further, the wiring pattern formed on the back side mounting surface 27 and connected to the terminals of the backside LED 21 is also connected to the LED control unit 43. The LED control unit 43 can control the driving of the respective liquid crystal panel LEDs 20 and the respective rear surface LEDs 21 based on the output signal from the image signal processing unit 41. Therefore, the LED control unit 43 can control lighting of the liquid crystal panel LED 20 and the back surface LED 21 in accordance with the image displayed on the liquid crystal panel 11. In addition, only the rear LED 21 can be controlled to emit light in a color that matches the image displayed on the liquid crystal panel 11 by the above-described configuration.

In addition, the outermost surface of the LED substrate 25 may be configured such that a white reflective layer (not shown) having excellent light reflectivity is formed, and the material used for the base material of the LED substrate 25 Alternatively, an insulating material such as ceramic can be used.

This embodiment is configured as described above, and its operation will be described next. The liquid crystal display device 10 having the above-described configuration is manufactured by assembling a separately manufactured liquid crystal panel 11 and backlight device 12 with a bezel 13 or the like. Among these, the LED unit which is a component of the backlight device 12 is assembled at a predetermined position by a holding member or the like in a state where the back surface side mounting surface 27 is superimposed on the bottom plate 14 a of the chassis 14. At this time, each rear LED 21 can be fixed after being positioned so as to coincide with the corresponding sub-opening 14e opened in the bottom plate 14a. Further, since the rear LED 21 is mounted on the back side of the LED substrate 25 on which the liquid crystal panel LED 20 is mounted, the rear LED 21 and the liquid crystal panel LED 20 are respectively mounted on separate substrates. A single LED board 25 may be assembled, and the assembling work can be easily performed. When the front and

back cabinets

30 and 31 are sandwiched from both the front and back sides of the liquid crystal display device 10 thus manufactured, the sub-opening 14e of the chassis 14 in which the rear LED 21 is held in the inserted state. The slits 32 of the back cabinet 31 coincide with each other.

When the power of the manufactured television receiver TV is turned on, the liquid crystal panel control unit 42 controls the driving of the liquid crystal panel 11 and the LED control unit 43 controls the liquid crystal panel LEDs 20 and the back surface of the backlight device 12. The driving of the LED 21 is controlled. Thereby, the illumination light is irradiated to the liquid crystal panel 11, and a predetermined image is displayed on the display surface 11a of the liquid crystal panel 11. Further, light of a color determined in accordance with an image displayed on the liquid crystal panel 11 is emitted from the slit 32 of the television receiver TV, and, for example, the indoor side wall on the back where the television receiver TV is disposed is irradiated. Thus, by performing indirect illumination that illuminates the back side wall with a color that matches the image displayed on the display surface 11a, it is possible to perform a space effect that makes the display surface 11a appear larger than the original size.

As described above, the backlight device 12 of the present embodiment includes the LED 20 for the liquid crystal panel that irradiates the liquid crystal panel 11 and the LED substrate on which the LED 20 for the liquid crystal panel is mounted on one surface (the liquid crystal panel side mounting surface 26). 25, a backside LED 21 mounted on the other surface (back side mounting surface 27) of the LED substrate 25, and a chassis 14 that houses the LED unit.

With such a configuration, in the backlight device 12 configured to irradiate an object different from the liquid crystal panel LED 20 that irradiates the liquid crystal panel 11 with the back surface LED 21, the liquid crystal panel LED 20 is mounted among the LED substrates 25. Compared with the case where the liquid crystal panel LED and the rear LED are mounted on separate LED substrates by mounting the rear LED 21 on the rear surface mounting surface 27 opposite to the liquid crystal panel side mounting surface 26. It is not necessary to provide an LED substrate for the backside LED, and the number of components can be reduced. Further, since the number of parts can be reduced, the number of steps in the assembly process can be reduced, and as a result, the cost can be reduced.

Further, the rear LED 21 is mounted at a position overlapping the mounting position of the liquid crystal panel LED 20 via the LED substrate 25. With such a configuration, the back surface of the liquid crystal panel side mounting surface 26 on which the LED 20 for the liquid crystal panel of the LED substrate 25 is mounted is used as the back surface mounting surface 27 without increasing the surface area of the LED substrate 25. Since the rear LED 21 can be mounted on the mounting surface 27, space can be saved in the backlight device 12. Further, by concentrating the drive circuits for the liquid crystal panel LED 20 and the back surface LED 21 in one place, the length of the wiring pattern on the LED substrate 25 to which the liquid crystal panel LED 20 and the back surface LED 21 are connected can be shortened. , Path heat generation can be suppressed.

The chassis 14 includes a bottom plate 14a and a side plate 14c rising from the bottom plate 14a, and an opening 14b for emitting light from the liquid crystal panel LED 20 is formed by an open end of the side plate 14c. 25, the rear side mounting surface 27 on which the rear side LED 21 is mounted is arranged so as to face the bottom plate 14a of the chassis 14, and the light from the rear side LED 21 is placed on the bottom plate 14a of the chassis 14 facing the rear side mounting surface 27. Is formed. With such a configuration, the rear side mounting surface 27 is disposed so as to face the bottom plate 14a of the chassis 14, and the sub opening 14e is provided in the facing portion. The light can be directly arranged on the portion 14e, and the light from the backside LED 21 can be directly emitted from the sub-opening portion 14e. With such a simple configuration, further cost reduction can be expected.

Further, the backside LED 21 is composed of a plurality, and the sub-opening 14e is provided for each backside LED 21. With such a configuration, it is possible to assemble the LED substrate 25 on which the rear LED 21 is mounted so as to correspond to the sub-opening portion 14e, so that it is excellent in assembling property or can prevent erroneous assembly.

Further, by using an LED as the light source, it is possible to adjust the luminance to the liquid crystal panel 11 depending on the number of the mounted light sources. For example, compared to the case where a linear light source such as a discharge tube is used, the usage range, etc. It can respond flexibly according to. Further, the life of the light source can be extended and the power consumption can be reduced.

Further, since the rear LED 21 is a multicolor light emitting LED, for example, when it is used for indirect illumination or the like using the light from the rear LED 21 as it is, the multicolor light does not pass through a color filter such as the liquid crystal panel 11. Therefore, it is possible to easily produce a space.

The liquid crystal display device 10 includes a backlight device 12 and a liquid crystal panel 11 that performs display using light from the liquid crystal panel LED 20 of the backlight device 12. According to the liquid crystal display device 10 as described above, the backside LED 21 is provided separately from the liquid crystal panel LED 20 that irradiates the liquid crystal panel 11, so that not only the liquid crystal display device 10 that displays an image on the liquid crystal panel 11, For example, it can be used as indirect illumination for illuminating a wall or the like around the liquid crystal panel 11. Further, in the backlight device 12 constituting the liquid crystal display device 10, since one LED substrate 25 serves as both the liquid crystal panel LED 20 and the back LED 21, the number of components can be reduced. Further, since the number of parts can be reduced, the number of steps in the assembly process can be reduced, and as a result, the cost can be reduced.

Further, the backlight device 12 and the liquid crystal panel 11 can be accommodated therein, and the

cabinets

30 and 31 are provided with slits 32 for emitting light from the rear LED 21. According to such a configuration, the light from the rear LED 21 can be emitted from the slit 32, and the emission direction and irradiation range can be adjusted by the shape of the slit 32.

Further, the slit 32 is formed on the back surface 31a opposite to the display surface 11a of the liquid crystal panel 11. According to such a configuration, by disposing the liquid crystal display device 10 on the indoor wall side, for example, by irradiating the adjacent wall or the like with the light from the back surface LED 21 emitted from the slit 32 opened in the back surface 31a, It can be used as indirect lighting.

In addition, since the liquid crystal display device 10 is usually installed along the wall side of the room, the slit 32 is provided so as to face the wall, so that the slit 32 itself and the backside LED 21 and the like disposed therein are used. It is possible to make it difficult for a person to visually recognize the aesthetic appearance.

Also, by arranging the slits 32 according to the arrangement of the rear LEDs 21, it is possible to reduce the number of parts and thus to reduce the cost. That is, in the so-called direct type backlight device 12 in which the mounting surface 26 of the liquid crystal panel LED 20 faces the display surface 11 a of the liquid crystal panel 11, the rear surface mounting surface 27, which is opposite to the liquid crystal panel side mounting surface 26. By mounting the rear LED 21 and providing the slit 32 on the rear surface 31a side, the light from the rear LED 21 can be emitted directly from the slit 32 without arranging a light guide member or the like. Thereby, compared with the case where it radiate | emits through a light guide member etc., cost reduction can be aimed at.

The liquid crystal panel 11 displays an image based on the input image signal from the image signal processing unit 41, and the driving of the liquid crystal panel LED 20 and the back surface LED 21 is controlled based on the input image signal. With such a configuration, the lighting and color of the rear LED 21 are controlled in accordance with the image to be displayed on the liquid crystal panel 11, and a space effect that makes the display image look larger than the original size can be realized.

Although the first embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and for example, the following modifications may be included. In the following modifications, the same members as those in the above embodiment are denoted by the same reference numerals as those in the above embodiment, and description thereof may be omitted.

[Modification 1 of Embodiment 1]
A first modification of the first embodiment will be described with reference to FIG. This modified example is different from the first embodiment in that a transparent sheet material 50 is disposed inside the slit 32 from which light from the backside LED 21 is emitted.

The sheet material 50 is a sheet-like member made of a substantially transparent synthetic resin material excellent in translucency, and as shown in FIG. 7, the bottom surface 31b (rear surface) of the back cabinet 31 so as to cover each slit 32 from the inside. It is fixed to the other side of 31a with an adhesive or the like. The sheet material 50 may be composed of a plurality of pieces each covering the individual slits 32, or may be composed of a single member that collectively covers the plurality of slits 32.

According to such a configuration, it is possible to prevent dust and the like from entering the

cabinets

30 and 31 from the slit 32 while the light from the rear LED 21 is emitted from the slit 32. Further, the rear LED 21 can be protected by not exposing the rear LED 21 directly to the outside of the television receiver TV.

[Modification 2 of Embodiment 1]
A second modification of the first embodiment will be described with reference to FIG. This modification is different from Embodiment 1 and Modification 1 of Embodiment 1 in that a diffusion sheet 51 is arranged inside a slit 32 from which light from the backside LED 21 is emitted.

The diffusing sheet 51 is made of the same material as the diffusing plate 15a constituting the optical member 15, has a substantially transparent resin sheet shape, and has a structure in which a large number of diffusing particles are dispersed in the base material. Has the function of diffusing light. As shown in FIG. 8, the diffusion sheet 51 is fixed to the bottom surface 31b of the back cabinet 31 with an adhesive or the like so as to cover each slit 32 from the inside. Similar to the first modification of the first embodiment, the diffusion sheet 51 may be composed of a plurality of pieces that individually cover the slits 32, or may be composed of a single member that collectively covers the plurality of slits 32. Also good.

According to such a configuration, the light from the rear LED 21 can be emitted from the slit 32 as planar light, and indirect illumination without luminance unevenness is possible. Further, as in the first modification of the first embodiment, the effects of preventing entry of dust and the like from the slit 32 and protecting the rear LED 21 from the outside of the television receiver TV can be exhibited.

[Modification 3 of Embodiment 1]
A third modification of the first embodiment will be described with reference to FIG. The present modification is different from the first embodiment, the first modification of the first embodiment, and the second modification in that a rear optical sheet 52 is disposed inside a slit 32 from which light from the rear LED 21 is emitted. .

The rear optical sheet 52 is made of the same material as the optical sheet 15b constituting the optical member 15, and two layers are laminated. Specific examples of the rear optical sheet 52 include a diffusion sheet, a lens sheet, and a reflective polarizing sheet, and can be appropriately selected from these. As shown in FIG. 9, the back optical sheet 52 is fixed to the bottom surface 31 b of the back cabinet 31 with an adhesive or the like so as to cover each slit 32 from the inside. Similar to the first and second modifications of the first embodiment, the rear optical sheet 52 may be composed of a plurality of pieces that individually cover the slits 32, or may cover the plurality of slits 32 collectively. You may be comprised from the member.

According to such a configuration, the light can be adjusted by adjusting the amount of light emitted from the slit 32 by the rear optical sheet 52, imparting directivity, etc., and indirect illumination can be performed with desired light.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS.
The present embodiment is different from the first embodiment in that it is a so-called edge light type. Since other configurations are the same as those in the first embodiment, the description thereof is omitted.

First, the configuration of the backlight device 61 in the liquid crystal display device 60 will be described. As shown in FIG. 10, the backlight device 61 includes a chassis 62 having a substantially box shape having an opening 62 a that opens toward the light emission surface side (the liquid crystal panel 11 side), and an opening 62 a of the chassis 62. And a group of optical members 63 arranged in a covering manner. Further, the chassis 62 includes an LED unit in which a liquid crystal panel LED 64 as a main light source and a back LED 65 as a sub light source are mounted on an LED substrate 66. In addition, a light guide member 67 that guides light from the liquid crystal panel LED 64 and guides the light to the optical member 63 (the liquid crystal panel 11), and a frame 16 that holds the light guide member 67 from the front side are provided. The backlight device 61 is of a so-called edge light type (side light type) in which the liquid crystal panel LEDs 20 mounted on the LED substrate 66 are disposed at both ends of the light guide member 67, respectively. The edge-light type backlight device 61 is integrally assembled to the liquid crystal panel 11 by a bezel 13 having a frame shape, thereby forming a liquid crystal display device 60.

The light guide member 67 is made of a synthetic resin material (for example, acrylic resin such as PMMA or polycarbonate) having a refractive index higher than that of air and substantially transparent (excellent translucency). As shown in FIG. 10, the light guide member 67 has a horizontally long rectangular shape when viewed in a plane like the liquid crystal panel 11 and the chassis 62, and the long side direction is the X axis direction and the short side direction is Y. It is consistent with the axial direction. As shown in FIG. 11, the light guide member 67 is disposed in the chassis 62 at a position immediately below the liquid crystal panel 11 and the optical member 15, and a pair of LED substrates disposed at both ends of the long side of the chassis 62. 66 are arranged so as to be sandwiched between them in the Y-axis direction. Therefore, while the alignment direction of the liquid crystal panel LED 64 and the back surface LED 65 (LED substrate 66) and the light guide member 67 coincides with the Y-axis direction, the optical member 15 (liquid crystal panel 11) and the light guide member 67 Are aligned with the Z-axis direction, and both alignment directions are orthogonal to each other. The light guide member 67 introduces light emitted from the liquid crystal panel LED 64 toward the Y-axis direction, and rises toward the optical member 15 side (Z-axis direction) while propagating the light inside. Has a function of emitting light.

Of the main plate surface of the light guide member 67, the surface facing the front side is a light emitting surface 67 a that emits internal light toward the optical member 15 and the liquid crystal panel 11. Of the outer peripheral end surfaces adjacent to the main plate surface in the light guide member 67, both end surfaces on the long side that are long along the X-axis direction are light incident surfaces 67b, which are respectively LED 64 for liquid crystal panels (LED substrate). 66) with a predetermined interval, and light emitted from the liquid crystal panel LED 64 is incident thereon. On the surface of the light guide member 67 opposite to the light emitting surface 67a, a reflection sheet 68 capable of reflecting the light in the light guide member 67 and rising up to the front side is provided so as to cover the entire area. Yes.

As shown in FIG. 10, the LED board 66 has an elongated plate shape extending along the long side direction (X-axis direction) of the chassis 62, and its main plate surface is parallel to the X-axis direction and the Z-axis direction. It is housed in the chassis 62 in a posture, that is, a posture perpendicular to the plate surfaces of the liquid crystal panel 11 and the light guide member 67 (optical member 15). A pair of LED substrates 66 are arranged corresponding to both end portions on the long side in the chassis 62, and are attached to the inner surfaces of both side plates 62c on the long side. The main plate surface of the LED substrate 66 and the inner side, that is, the surface facing the light guide member 67 (the surface facing the light guide member 67) is a light guide member side mounting surface 66a, and the liquid crystal panel LED 64 is surface mounted. ing. A plurality of the liquid crystal panel LEDs 64 are arranged in a line (linearly) in parallel along the length direction (X-axis direction) of the light guide member-side mounting surface 66a. Since the pair of LED substrates 66 are housed in the chassis 62 in such a posture that the light guide member side mounting surfaces 66a face each other, the light emitting surfaces of the liquid crystal panel LEDs 64 respectively mounted on the LED substrates 66 face each other. And the optical axis of the liquid crystal panel LED 64 substantially coincides with the Y-axis direction.

The surface of the LED substrate 66 opposite to the light guide member side mounting surface 66a is a back surface mounting surface 66b, and the back surface LED 65 is surface mounted. A plurality of the backside LEDs 65 are arranged in a line along the length direction on the backside mounting surface 66b, and the backside LED 65 is placed in a positional relationship overlapping with the liquid crystal panel LEDs 64 in the Y-axis direction. Yes. That is, the LED board 66 and the rear surface LED 65 are both mounted on the LED board 66.

Now, a plurality of sub-openings 62d into which the rear LED 65 can be inserted are formed on both side plates 62c on the long side of the chassis 62. The sub-openings 62d have a substantially rectangular opening shape, and a plurality of sub-openings 62d are arranged in a line along the X-axis direction. The LED substrate 66 is fixed with screws or the like so that the back surface mounting surface 66b overlaps the side plate 62c of the chassis 62. At this time, the rear LED 65 is fitted into the corresponding sub-opening 62d as shown in FIG. 11 and FIG.

The liquid crystal display device 10 having such a configuration is accommodated in both front and

back cabinets

70 and 71 as shown in FIG. On the upper and lower side surfaces of the back cabinet 71, the rear LED 65 and the slit 72 corresponding to the sub-opening 62d into which the rear LED 65 is fitted are formed. The shape of the slit 72 is exemplified by a square shape as in the first embodiment, and the light from the backside LED 65 can be individually emitted. The light emitting surface of the rear LED 65 is exposed to the outside of the back cabinet 71 through the slit 72, and its optical axis is in the Y-axis direction.

The present embodiment is configured as described above, and the operation thereof will be described subsequently.
When the power of the manufactured television receiver TV is turned on, the liquid crystal panel 11 is irradiated with illumination light by the same drive control as in the first embodiment, and a predetermined image is displayed on the liquid crystal panel 11. Further, light of a color determined in accordance with the image displayed on the liquid crystal panel 11 is emitted in the vertical direction from the slit 72 of the television receiver TV, and, for example, the upper or lower space or wall in which the television receiver TV is disposed is irradiated. Is done.

According to such a configuration, even the edge light type backlight device 61 can be expected to have the same effect as the direct type of the first embodiment. Further, the arrangement of the slits 72 according to the arrangement of the

various LEDs

64 and 65, that is, in the present embodiment, by providing the slits 72 on the peripheral surface of the display surface, the light from the rear LED 65 can be emitted directly. It becomes. By adopting such a simple configuration, it is possible to reduce the number of parts and reduce the cost as in the first embodiment.

[Modification 1 of Embodiment 2]
Modification 1 of Embodiment 2 will be described with reference to FIGS. 13 and 14. This modification is different from the second embodiment in that the LED units are arranged along the short side direction (Y-axis direction) of the chassis 83.

As shown in FIG. 14, the light guide member 82 of the backlight device 81 in the liquid crystal display device 80 is arranged in the chassis 83 at a position directly below the liquid crystal panel 11 and the optical member 15. Between the pair of LED substrates 84 arranged at both ends of the X-axis direction. Therefore, the alignment direction of the liquid crystal panel LED 85, the rear LED 86 (LED substrate 84), and the light guide member 82 coincides with the X-axis direction. The light guide member 82 introduces the light emitted from the LED 85 for the liquid crystal panel toward the X-axis direction, and rises toward the optical member 15 side (Z-axis direction) while propagating the light inside. To emit.

Of the outer peripheral end surfaces adjacent to the main plate surface of the light guide member 67, both end surfaces on the short side that form a short shape along the Y-axis direction are light incident surfaces 82b, which are respectively LED 85 for liquid crystal panels (LED The light is emitted from the liquid crystal panel LED 85, and is opposed to the substrate 84) at a predetermined interval.

As shown in FIG. 13, the LED substrate 84 has an elongated plate shape extending along the short side direction (Y-axis direction) of the chassis 83, and the main plate surface thereof is parallel to the Y-axis direction and the Z-axis direction. It is accommodated in the chassis 83 in a posture, that is, a posture orthogonal to the plate surfaces of the liquid crystal panel 11 and the light guide member 82 (optical member 15). The LED boards 84 are arranged in pairs corresponding to both ends on the short side in the chassis 83, and are attached to the inner surfaces of both side plates 83a on the short side. The main plate surface of the LED substrate 84 and the inner side, that is, the surface facing the light guide member 82 is a light guide member side mounting surface 84a, and the liquid crystal panel LED 85 is surface-mounted. The surface of the LED substrate 84 opposite to the light guide member side mounting surface 84a is a back surface mounting surface 84b, and the back surface LEDs 86 are surface mounted.

A plurality of sub-openings 83b into which the rear LED 86 can be inserted are formed on both side plates 83a on the short side of the chassis 83. The sub-openings 83b have a substantially square opening shape, and a plurality of sub-openings 83b are arranged in a line along the Y-axis direction. The LED substrate 84 is fixed with screws or the like so that the rear surface mounting surface 84 b overlaps the side plate 83 a of the chassis 83. At this time, the rear LED 86 is fitted into the corresponding sub-opening 83b as shown in FIG.

The liquid crystal display device 80 having such a configuration is accommodated in both front and

back cabinets

87 and 88 as shown in FIG. A slit 89 corresponding to the rear LED 86 and the sub-opening 83b into which the rear LED 86 is fitted is formed on both side surfaces of the rear cabinet 88 extending in the Y-axis direction. The shape of the slit 89 is exemplified by a square shape as in the second embodiment, and the light from the back surface LEDs 86 can be individually emitted. The light emitting surface of the back LED 86 is exposed to the outside of the back cabinet 88 through the slit 89, and its optical axis is in the X-axis direction.

When the power of the television receiver TV having the above configuration is turned on, light of a color determined according to the image displayed on the liquid crystal panel 11 is emitted in both the left and right directions from the slit 89 of the television receiver TV. The space or wall on both the left and right sides where the TV is placed is irradiated. Even with such a configuration, the same effect as in the second embodiment can be expected.

[Modification 2 of Embodiment 2]
A second modification of the second embodiment will be described with reference to FIGS. 15 to 17. This modification is different from Embodiment 2 and Modification 1 of Embodiment 2 in that the LED unit has a total of 4 units along the short side direction (Y-axis direction) and the long side direction (X-axis direction) of the chassis 93. The place where it is arranged is different.

As shown in FIG. 15, the light guide member 92 of the backlight device 91 in the liquid crystal display device 90 is disposed in the chassis 93 at a position directly below the liquid crystal panel 11 and the optical member 15, and is attached to the side plate 93 a of the chassis 93. The two LED boards 94 are arranged so as to be sandwiched between the X-axis direction and the Y-axis direction, respectively. The light guide member 92 introduces light emitted from the LED 95 for the liquid crystal panel toward the X-axis direction or the Y-axis direction, and is directed toward the optical member 15 side (Z-axis direction) while propagating the light inside. Start up and emit.

All the outer peripheral end surfaces adjacent to the main plate surface of the light guide member 92 are light incident surfaces 92b, which are respectively opposed to the liquid crystal panel LEDs 95 (LED substrates 94) with a predetermined space therebetween. The light emitted from the LED 95 for use enters.

As shown in FIG. 15, the LED substrate 94 has an elongated plate shape extending along the long side direction (X-axis direction) or the short side direction (Y-axis direction) of the chassis 93, and the main plate surface is liquid crystal. The panel 11 and the light guide member 92 (optical member 15) are accommodated in the chassis 93 in a posture orthogonal to the plate surfaces. A pair of LED boards 94 are arranged corresponding to both ends on the long side in the chassis 93, another pair is arranged corresponding to both ends on the short side, and attached to the inner surface of each side plate 93a. Yes. The main plate surface of the LED substrate 94 and the inner side, that is, the surface facing the light guide member 92 is a light guide member side mounting surface 94a, and the liquid crystal panel LED 95 is surface-mounted. The surface of the LED substrate 94 opposite to the light guide member side mounting surface 94a is a back surface mounting surface 94b, and the back surface LED 96 is surface mounted.

The side plate 93a of the chassis 93 is formed with a plurality of sub-openings 93b into which the rear LED 96 can be inserted. The sub opening 93b has a substantially square opening shape, and a plurality of sub openings 93b are arranged in a line along the extending direction of the side plate 93a. The LED board 94 is fixed with screws or the like so that the rear side mounting surface 94b overlaps the side plate 93a of the chassis 93. At this time, the rear LED 96 is fitted into the corresponding sub-opening 93b as shown in FIGS.

The liquid crystal display device 90 having such a configuration is accommodated in both front and

back cabinets

97 and 98 as shown in FIGS. A slit 99 corresponding to the back-side LED 96 and the sub-opening 93b into which the back-side LED 96 is fitted is formed on a side surface of the back-side cabinet 98 that extends in the X-axis direction and the Y-axis direction. The shape of the slit 99 is exemplified by a rectangular shape as in the second embodiment, and the light from the back LEDs 96 can be individually emitted. The light emitting surface of the rear LED 96 is exposed to the outside of the back cabinet 98 through the slit 99, and its optical axis is in the X-axis direction or the Y-axis direction.

When the power of the television receiver TV having the above configuration is turned on, light of a color determined in accordance with the image displayed on the liquid crystal panel 11 is emitted from the slit 99 of the television receiver TV in the left, right, up and down directions. The space or wall on each side of the left, right, up, and down sides where the receiving device TV is arranged is irradiated. Even with such a configuration, the same effects as those of the second embodiment and the first modification of the second embodiment can be expected.

[Modification 3 of Embodiment 2]
A third modification of the second embodiment will be described with reference to FIGS. 18 and 19. This modification is different from the second embodiment in that the LED unit is arranged along only the lower side in the short side direction (Y-axis direction) of the chassis 83.

Among the backlight devices 101 in the liquid crystal display device 100, the light guide member 102 is housed in the chassis 103 together with a single LED substrate 104 disposed on the lower end of the long side of the chassis 103. The light guide member 102 introduces the light emitted from the LED 105 for the liquid crystal panel toward the Y-axis direction, and rises and emits the light toward the optical member 15 side (Z-axis direction) while propagating the light inside. Let

Of the outer peripheral end surfaces adjacent to the main plate surface of the light guide member 102, the lower end surface on the long side along the X-axis direction is a light incident surface 102b, and each of the liquid crystal panel LED 105 (LED substrate 104) and a predetermined The light is emitted from the liquid crystal panel LED 105 and is opposed to the liquid crystal panel.

As shown in FIG. 18, the LED substrate 104 has an elongated plate shape extending along the long side direction (X-axis direction) of the chassis 103, and its main plate surface is parallel to the X-axis direction and the Z-axis direction. It is accommodated in the chassis 103 in a posture. The LED substrate 104 is attached to the inner surface of the lower side plate 103 a on the long side of the chassis 103. The main plate surface of the LED substrate 104 and the inner side, that is, the surface facing the light guide member 102 is a light guide member side mounting surface 104a, and the liquid crystal panel LED 105 is surface-mounted. The surface opposite to the light guide member side mounting surface 104a of the LED substrate 104 is a back surface mounting surface 104b, and the back surface LED 106 is surface mounted.

The side plate 103a below the short side of the chassis 103 is formed with a plurality of sub-openings 103b into which the rear LEDs 106 can be inserted. The sub-opening 103b has a substantially square opening shape, and a plurality of sub-openings 103b are arranged in a line along the X-axis direction. The LED substrate 104 is fixed with screws or the like so that the rear side mounting surface 104b overlaps the side plate 103a of the chassis 103. At this time, the rear LED 106 is fitted into the corresponding sub-opening 103b as shown in FIG.

The liquid crystal display device 100 having such a configuration is accommodated in both front and

back cabinets

107 and 108 as shown in FIG. A slit 109 corresponding to the back-side LED 106 and the sub-opening 103 b into which the back-side LED 106 is fitted is formed on the lower side surface of the back-side cabinet 108 that extends in the X-axis direction. The shape of the slit 109 is exemplified by a rectangular shape as in the second embodiment, and the light from the back LED 106 can be individually emitted. The light emitting surface of the back LED 106 is exposed to the outside of the back cabinet 108 through the slit 109, and its optical axis is in the Y-axis direction.

When the power of the television receiver TV having the above configuration is turned on, light of a color determined according to the image displayed on the liquid crystal panel 11 is emitted downward from the slit 109 of the television receiver TV, for example, television reception The lower space and floor where the apparatus TV is arranged are irradiated. Even with such a configuration, the same effect as in the second embodiment can be expected.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

(1) The sheet material 50, the diffusion sheet 51, and the rear optical sheet 52 exemplified in the first modification to the third modification of the first embodiment described above are the same as those in the first to third modifications of the second and second embodiments. The present invention may be applied to an edge light type backlight device. Further, the sheet member and the optical member are not limited to the modes exemplified in the respective embodiments, and for example, the optical member may be arranged so as to overlap the sheet member, or a plurality of various optical members may be laminated.

(2) In Embodiment 1 described above, the slits 32 are linearly arranged at predetermined intervals so as to follow the peripheral surface excluding the lower end portion of the back surface 31a of the back cabinet 31. It is not restricted to, You may form over the perimeter. Accordingly, the backside LED 21 and the sub-opening 14e need only be formed corresponding to the slit 32.

(3) In Modification 1 to Modification 3 of Embodiment 2 and Embodiment 2 described above, the backside LEDs are arranged alternately with respect to the liquid crystal panel LEDs. It may be mounted so as to overlap the liquid crystal panel LED, or may be formed on the opposite surface of the liquid crystal panel side mounting surface regardless of the mounting position of the other liquid crystal panel LED.

(4) In each of the above-described embodiments, the surface opposite to the liquid crystal panel side mounting surface is the back side mounting surface. However, the present invention is not limited to this. For example, any one of the L-shaped LED substrates is mounted on the liquid crystal panel. It may be a surface, and any of the other plate surfaces may be a back side mounting surface.

(5) In each embodiment described above, the sub-opening and the slit are individually formed for each backside LED. However, the present invention is not limited to this, and for example, a subopening into which a plurality of backside LEDs can be inserted at once. The slit which can radiate | emit the light from a part and several LED for back surfaces collectively may be sufficient.

(6) In each of the above-described embodiments, the multi-color LED is applied as the back LED. However, the present invention is not limited to this, and the LED that emits the same color (for example, white) as the liquid crystal panel LED may be used. Good.

(7) In each of the above-described embodiments, the case where an LED is used as the light source is exemplified. However, the present invention is not limited to this. For example, a cold cathode tube, a hot cathode tube, and other discharge tubes are also included in the present invention. .

(8) In each of the embodiments described above, a TFT is used as a switching element of a liquid crystal display device. However, the present invention can also be applied to a liquid crystal display device using a switching element other than TFT (for example, a thin film diode (TFD)). In addition to the liquid crystal display device for display, the present invention can also be applied to a liquid crystal display device for monochrome display.

(9) In each of the above-described embodiments, the liquid crystal display device using the liquid crystal panel as the display panel has been exemplified. However, the present invention can also be applied to display devices using other types of display panels.

(10) In each of the above-described embodiments, the television receiver provided with the tuner is exemplified. However, the present invention can also be applied to a display device that does not include the tuner.

DESCRIPTION OF SYMBOLS 10 ... Liquid crystal display device (display apparatus), 11 ... Liquid crystal panel (display panel, to-be-irradiated body), 12 ... Backlight apparatus (illuminating device), 14 ... Chassis, 14a ... Bottom plate, 14e ... Sub-opening, 15 ... Optical 20 ... Liquid crystal panel LED (main light source), 21 ... Back LED (sub light source), 25 ... LED substrate (light source substrate), 26 ... Liquid crystal panel side mounting surface, 27 ... Back side mounting surface (sub light source side) Mounting surface), 30 ... Front cabinet (exterior member), 31 ... Back cabinet (exterior member), 31a ... Back, 31b ... Bottom, 32 ... Slit, 40 ... Antenna, 41 ... Image signal processor, 42 ... LCD panel control Part, 43 ... LED control part, TV ... TV receiver

Claims

A main light source for irradiating the irradiated object;
A light source substrate on which the main light source is mounted on one surface;
A sub-light source mounted on the other surface of the light source substrate, and a light source unit comprising:
A chassis that houses the light source unit;
A lighting device comprising:
The illumination device according to claim 1, wherein the sub-light source is mounted at a position overlapping the mounting position of the main light source via the light source substrate.
The chassis includes a bottom plate and a side plate rising from the bottom plate, and a main opening that emits light from the main light source is formed by an open end of the side plate,
The light source board is disposed such that a sub light source side mounting surface on which the sub light source is mounted faces the bottom plate or the side plate of the chassis, and the bottom plate of the chassis or the side plate facing the sub light source side mounting surface The lighting device according to claim 1, wherein a side opening is formed with a sub-opening that emits light from the sub-light source.
The auxiliary light source comprises a plurality of
The lighting device according to claim 3, wherein the sub opening is provided for each sub light source.
The illuminating device according to any one of claims 1 to 4, wherein the main light source and the sub light source are LEDs.
The illumination device according to any one of claims 1 to 5, wherein the sub-light source is a multicolor light emitting LED.
A display device comprising: the illumination device according to any one of claims 1 to 6; and a display panel as the irradiated body that performs display using light from the main light source of the illumination device.
The display device according to claim 7, further comprising: an exterior member capable of accommodating the illumination device and the display panel therein and having a slit for emitting light from the sub-light source.
The display device according to claim 8, wherein the slit is formed on a back surface opposite to a display surface of the display panel or on a peripheral surface of the display surface.
The display device according to claim 8 or 9, wherein the slit is closed by a sheet member having translucency from the inside of the exterior member.
The display device according to any one of claims 8 to 10, wherein an optical member is disposed on the sub-light source side of the slit.
The display panel displays an image based on an input image signal,
The display device according to claim 7, wherein the driving of the sub light source is controlled based on the input image signal.
The display device according to any one of claims 7 to 12, wherein the display panel is a liquid crystal panel in which liquid crystal is sealed between a pair of substrates.
A television receiver comprising the display device according to any one of claims 7 to 13.