WO2013051437A1

WO2013051437A1 - Lighting device, display device and television receiving device

Info

Publication number: WO2013051437A1
Application number: PCT/JP2012/074630
Authority: WO
Inventors: 真之助野澤
Original assignee: シャープ株式会社
Priority date: 2011-10-03
Filing date: 2012-09-26
Publication date: 2013-04-11

Abstract

This lighting device is characterized by comprising: a chassis (20); a central LED (41) that is arranged on the chassis (20); an end-side LED (42) that is arranged on the chassis (20) closer to an end thereof than the central LED (41); a central diffusing lens (51) that exerts an optical action on the light from the central LED (41); an end-side diffusing lens (52) that exerts an optical action on the light from the end-side LED (42); a first adhesive (61) that has a surface (61A), which is capable of absorbing light, and affixes the central diffusing lens (51) to the chassis (20); and a second adhesive (62) that has a surface (62A), which is capable of absorbing light and has a smaller area than the surface (61A), and affixes the end-side diffusing lens (52) to the chassis (20).

Description

Lighting device, display device, and television receiver

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

In recent years, image display devices such as television receivers are shifting from conventional cathode ray tubes to thin display devices to which thin display elements such as liquid crystal panels and plasma display panels are applied. When a liquid crystal panel is used as the display element, the liquid crystal panel does not emit light, and thus a backlight device is separately required as a lighting device.

Patent Document 1 discloses a backlight device including a plurality of LEDs (light sources) mounted on a substrate. In Patent Document 1, an optical lens (a diffusion lens) is fixed to the substrate so as to cover the light emitting surface of the LED. Thereby, the light from the LED can be diffused, and the backlight device can be thinned and the number of LEDs can be reduced.

JP 2011-90977 A

(Problems to be solved by the invention)
By the way, in the backlight device as described above, there is a problem that the luminance on the end side in the light emitting portion (light emitting surface) tends to be lower than the luminance on the central side, and luminance unevenness is likely to occur. This is due to the fact that the number of light sources arranged (light source density) is smaller at the end of the backlight device than at the center.

In order to make the luminance of the backlight device uniform, for example, by changing the current value for driving the LED, the luminance of the LED arranged on the end side of the backlight device is changed to the luminance of the LED arranged on the center side. A method of making it relatively higher can be considered. However, in such a method, it is necessary to electrically control each LED.

The present invention has been completed based on the above circumstances, and an object thereof is to provide an illumination device capable of suppressing luminance unevenness with a simple configuration. Moreover, it aims at providing the display apparatus provided with such an illuminating device, and a television receiver.

(Means for solving the problem)
In order to solve the above-described problems, a lighting device according to the present invention includes a chassis, a first light source disposed in the chassis, and a second light source disposed closer to the end side than the first light source in the chassis. In the chassis, the first optical element is disposed so as to cover the light emitting surface of the first light source and exerts an optical action on the light from the first light source, and the second light source in the chassis. And a first optical absorption surface capable of absorbing light, the second optical element being arranged so as to cover the light emitting surface of the first optical element and having an optical effect on the light from the second light source, A first fixing member for fixing the optical element to the chassis; and a second light absorbing surface capable of absorbing light and having an area smaller than that of the first light absorbing surface, wherein the second optical element is attached to the chassis. And a second fixing member that fixes the second fixing member.

In the present invention, the area of the second light absorbing surface of the second fixing member that fixes the second optical element to the chassis is equal to the first light absorption of the first fixing member that fixes the first optical element to the chassis. It is set smaller than the surface. With such a configuration, for example, the light emitted from the first light source and the second light source is in the vicinity of the first fixing member (first light absorption surface) and the second fixing member (second light absorption surface). When headed, the second light absorption surface having a relatively small area is less likely to receive and be absorbed than the first light absorption surface. In other words, light is more likely to be reflected in the vicinity of the second light absorption surface than in the vicinity of the first light absorption surface.

As described above, in the lighting device, the area of the second light absorption surface disposed on the end side (second light source side) of the chassis where the luminance is likely to be low is made smaller than the area of the first light absorption surface. Thus, a situation (luminance unevenness) in which a difference occurs between the luminance on the center side (first light source side) and the luminance on the end side (second light source side) in the lighting device (chassis) can be suppressed. The brightness can be made uniform. Moreover, in this invention, a brightness nonuniformity can be suppressed by setting the magnitude | size of the light absorption surface which the fixing member (1st fixing member and 2nd fixing member) for fixing an optical element has. That is, it is not necessary to provide a dedicated member for suppressing luminance unevenness, and a simple configuration can be achieved.

In the above configuration, the light source board is fixed to the chassis, the first light source and the second light source are mounted, and the first optical element and the second optical element are fixed. The member is a first adhesive that bonds the first optical element to the light source substrate, and the second fixing member is a second adhesive that bonds the second optical element to the light source substrate. can do.

If the first fixing member and the second fixing member are adhesives, the first optical element and the second optical element can be easily fixed to the light source substrate.

The first light absorption surface is a surface on the emission side of the illumination device of the illumination device in the first adhesive, and the second light absorption surface is illumination light of the illumination device in the second adhesive. It is possible to be a surface on the emission side.

If the first light absorption surface and the second light absorption surface are the surfaces of the adhesive, the first light absorption surface and the second light absorption surface can be easily adjusted by adjusting the application amount (volume to be applied) of the adhesive. The area can be set.

The first optical element is attached to the light source substrate and has a first mounting leg portion having a columnar shape, and the first fixing member covers the periphery of the first mounting leg portion in a plan view. The second optical element is attached to the light source substrate and has a column-shaped second mounting leg, and the second fixing member surrounds the second mounting leg in a plan view. It can be arranged in a covering form.

With such a configuration, the first mounting leg can be more reliably fixed by the first fixing member, and the second mounting leg can be more reliably fixed by the second fixing member.

Further, the first light absorption surface and the second light absorption surface may be black. By making the surface black, the first light absorption surface and the second light absorption surface can be easily formed.

The chassis includes a plurality of light sources including the first light source and the second light source, and the first light source is arranged on a central side in the arrangement direction of the plurality of light sources among the plurality of light sources. The second light source may be a light source disposed on each of both end sides in the arrangement direction of the plurality of light sources among the plurality of light sources.

When a plurality of light sources are arranged, both ends of the plurality of light sources are likely to have lower brightness than the central portion. For this reason, the light source arranged on both ends is a second light source, that is, a light source corresponding to the second light absorbing surface (second fixing member) in which light is not easily absorbed. Brightness can be made uniform.

The chassis may have a rectangular bottom plate, and the plurality of light sources may be arranged along one side of the bottom plate. With such a configuration, it is possible to make the luminance uniform over one side direction of the bottom plate.

Also, at least one of the first light source and the second light source can be a light emitting diode. By using a light emitting diode as a light source, high luminance can be achieved and power consumption can be suppressed.

The first optical element may be a diffusing lens that diffuses light from the first light source. Luminance unevenness can be further reduced by providing a diffusion lens.

Further, the second optical element may be a diffusing lens that diffuses light from the second light source. Luminance unevenness can be further reduced by providing a diffusion lens.

The chassis further includes a light emitting portion that emits light from the first light source and the second light source, and further includes an optical member arranged to cover the light emitting portion, the optical member Is a diffusion plate having a function of diffusing light from the first light source and the second light source, a function of condensing light transmitted through the diffusion plate, or a function of diffusing light transmitted through the diffusion plate. And an optical sheet having at least one function.

With such a configuration, the light emitted from the light emitting portion of the chassis is transmitted through the diffusion plate and the optical sheet, and the luminance of the illumination device can be made even more uniform.

Next, in order to solve the above-described problem, a display device of the present invention includes the above-described illumination device and a display panel that performs display using light from the illumination device.

Also, 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, for example, a desktop screen of a television or a personal computer, and is particularly suitable for a large screen.

Next, in order to solve the above-described problem, a television receiver according to the present invention includes the display device.

(The invention's effect)
ADVANTAGE OF THE INVENTION According to this invention, the illuminating device which can suppress a brightness nonuniformity with a simple structure can be provided. In addition, it is possible to provide a display device and a television receiver including such a lighting device.

1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1 of the present invention. 1 is an exploded perspective view showing a schematic configuration of a liquid crystal display device included in the television receiver of FIG. The top view which shows the backlight apparatus with which the liquid crystal display device of FIG. 2 is provided. In FIG. 3, an enlarged view showing an enlarged corner of the bottom plate Sectional view of the liquid crystal display device cut along the short side direction (Y-axis direction) (corresponding to the view cut along line AA in FIG. 3) In FIG. 5, the enlarged view showing the central LED and the central diffusing lens in an enlarged manner. FIG. 5 is an enlarged view showing the end side LED and the end side diffusion lens in an enlarged manner. The top view which shows the backlight apparatus which concerns on Embodiment 2. FIG. In FIG. 8, an enlarged view showing the corner of the bottom plate in an enlarged manner FIG. 6 is an exploded perspective view showing a schematic configuration of a liquid crystal display device according to Embodiment 3. FIG. 10 is an enlarged view showing an LED and a diffusing lens in the backlight device included in the liquid crystal display device of FIG.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. 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.

As shown in FIG. 1, the television receiver TV according to the present embodiment includes a liquid crystal display device 10, front and back cabinets Ca and Cb that are accommodated so as to sandwich the liquid crystal display device 10, a power source P, a tuner T, And a stand S. The liquid crystal display device 10 (display device) has a horizontally long rectangular shape (rectangular shape) as a whole, and is accommodated in a vertically placed state.

As shown in FIG. 2, the liquid crystal display device 10 includes a backlight device 12 (illumination device) that is an external light source, and a liquid crystal panel 11 (display panel) that performs display using light from the backlight device 12. These are integrally held by a frame-like bezel 13 or the like.

Next, the liquid crystal panel 11 and the backlight device 12 constituting the liquid crystal display device 10 will be described in order. The liquid crystal panel 11 has a rectangular shape in plan view, and is configured such that a pair of glass substrates are bonded together with a predetermined gap therebetween, and liquid crystal is sealed between the glass substrates.

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 is disposed on the outside of both substrates.

Subsequently, the backlight device 12 will be described in detail. As shown in FIG. 2, the backlight device 12 includes a substantially box-shaped chassis 20 having an opening 24 (light emitting portion) opened on the liquid crystal panel 11 side (light emitting side of the backlight device 12). The optical member 15 disposed so as to cover the opening 24 of the chassis 20, and the frame 16 disposed along the outer edge portion of the chassis 20 and holding the outer edge portion of the group of optical members 15 between the chassis 20. And a light reflection sheet 30 capable of reflecting the light in the chassis 20 to the optical member 15 side (front side).

As shown in FIGS. 3 and 5, an LED unit U having LEDs 40 (Light Emitting Diodes) is accommodated in the chassis 20. In the backlight device 12, the light from the LED 40 is emitted from the opening 24, and the optical member 15 side is the light emitting side from the LED unit U. The backlight device 12 of the present embodiment is a so-called direct-type backlight device, and includes a plurality of LEDs 40 (light sources) along the panel surface immediately below the back surface of the panel surface (display surface) of the liquid crystal panel 11. It has a configuration.

The chassis 20 is made of, for example, metal. As shown in FIGS. 3 and 5, a liquid crystal panel 11 has a bottom plate 21 having a rectangular shape (rectangular shape), and liquid crystals are formed from the outer ends of each side of the bottom plate 21. It consists of a side plate 22 rising to the panel 11 side (light emitting side) and a receiving plate 23 projecting outward from the rising end of each side plate 22, and as a whole is a shallow substantially box-shaped (substantially shallow dish) opened toward the front side. Shape).

The chassis 20 is arranged such that its long side direction coincides with the horizontal direction (X-axis direction) and its short side direction coincides with the vertical direction (Y-axis direction). On each receiving plate 23 in the chassis 20, a frame 16 and an optical member 15 described below can be placed from the front side. The frame 16 is screwed to each receiving plate 23.

As shown in FIG. 2, the optical member 15 has a horizontally long rectangular shape (rectangular shape) in plan view, like the liquid crystal panel 11 and the chassis 20. As shown in FIG. 5, the optical member 15 is placed between the liquid crystal panel 11 and the LED unit U while covering the opening 24 of the chassis 20 by placing the outer edge portion on the receiving plate 23. Arranged. The optical member 15 includes a diffusion plate 15a disposed on the LED unit U side (opposite to the light emitting side) and an optical sheet 15b disposed on the liquid crystal panel 11 side (light emitting side).

The diffusion plate 15a has a structure in which a large number of diffusion particles are dispersed in a substantially transparent resin base material having a predetermined thickness and has a function of diffusing transmitted light (light from the LED 40). 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 having a function of diffusing the light transmitted through the diffusion plate 15a, a lens sheet having a function of collecting the light transmitted through the diffusion plate 15a, and a reflective polarizing sheet. These can be appropriately selected from these and used.

Further, as shown in FIGS. 2 and 3, a support pin 38 having a substantially conical shape is attached to the center position of the bottom plate 21 in the short side direction so as to protrude toward the optical member 15 side. The support pin 38 is configured to be able to support the optical member 15 from the back side at the tip thereof.

As shown in FIG. 2, the frame 16 has a frame shape along the outer peripheral edge portions of the liquid crystal panel 11 and the optical member 15. An outer edge portion of the optical member 15 can be sandwiched between the frame 16 and each receiving plate 23 (see FIG. 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 arranged on the front side.

The light reflecting sheet 30 is made of, for example, a synthetic resin, and has a white surface with excellent light reflectivity. The light reflecting sheet 30 is sized to cover almost the entire inner surface of the chassis 20, and extends along the inner surface of the chassis 20 as shown in FIGS. 3 and 5. That is, the light reflecting sheet 30 is arranged so as to cover the bottom plate 21 from the front side.

Further, as shown in FIG. 5, the outer peripheral side portion of the light reflecting sheet 30 rises so as to cover the side plate 22 and the receiving plate 23 of the chassis 20, and the portion placed on the receiving plate 23 is the chassis 20 and the optical member 15. Is sandwiched between. In addition, the part which connects the sheet | seat main-body part 31 extended along the baseplate 21 of the chassis 20 and the part mounted on the receiving plate 23 among the light reflection sheets 30 has comprised the inclined form.

Further, as shown in FIGS. 6 and 7, a plurality of insertion holes 31 B into which a later-described diffusion lens 50 is inserted are formed in the sheet main body portion 31 of the light reflecting sheet 30 corresponding to each of the diffusion lenses 50. Has been. Thus, the light reflecting sheet 30 can be placed on the chassis 20 without interference between the sheet main body 31 and the diffusing lens 50.

Next, the configuration of the LED unit U will be described in detail. The LED unit U is arranged on the bottom plate 21, and as shown in FIGS. 3 and 5, the LED 40 (first light source and second light source), the LED substrate 45 (light source substrate) on which the LED 40 is mounted, and the LED And a diffusing lens 50 (first optical element or second optical element) attached to the substrate 45.

The LED 40 is a kind of point light source, and has an LED chip (not shown) sealed with a resin material. The LED chip has, for example, one main emission wavelength, and specifically, one that emits blue light in a single color is used. On the other hand, a phosphor that converts blue light emitted from the LED chip into white light is dispersed and blended in the resin material for sealing the LED chip. Thereby, the LED 40 can emit white light.

As shown in FIG. 5, the LED 40 is arranged with its light emitting surface 40 A facing the front side. As shown in FIG. 6, the optical axis LA of the LED 40 is set to substantially coincide with the Z-axis direction (direction orthogonal to the main plate surface of the liquid crystal panel 11 and the optical member 15). The light emitted from the LED 40 spreads radially to some extent within a predetermined angle range around the optical axis LA, but its directivity is higher than that of a cold cathode tube or the like. . That is, the light emission intensity of the LED 40 shows an angular distribution in which the direction along the optical axis LA is conspicuously high, and decreases rapidly as the tilt angle with respect to the optical axis LA increases.

The LED board 45 has a rectangular shape extending along the long side direction of the chassis 20 as shown by a broken line in FIG. 3, the long side direction matches the X axis direction, and the short side direction is the Y axis direction. It extends along the surface of the bottom plate 21 in the chassis 20 in a matching state (see FIG. 5). The base material of the LED substrate 45 is made of, for example, a synthetic resin, and has a configuration in which a wiring pattern (not shown) that is electrically connected to the LED 40 is formed on a surface of the metal substrate such as a copper foil. Is done. In addition, the material used for the base material of LED board 45 can be changed suitably, for example, it is also possible to use metal materials, such as insulating materials, such as a ceramic, and aluminum-type material.

In the LED substrate 45, a solder resist layer (not shown) is laminated on the surface on which the LED 40 is mounted so as to cover the wiring pattern. This solder resist layer has a highly light-reflective color (for example, white), protects the wiring pattern, and at the same time, increases the light utilization efficiency by reflecting the light emitted from the LED 40 to the liquid crystal panel 11 side. Is responsible.

The LED board 45 and the light reflecting sheet 30 are attached to the chassis 20 (bottom plate 21) by a plurality of holding members 35 as shown in FIG. The holding member 35 is disposed between two adjacent LEDs 40 (diffuse lenses 50). As shown in FIG. 6, the holding member 35 has a main body portion 36 that has a circular shape in plan view, and a fixing portion 37 that protrudes from the main body portion 36 toward the back side, that is, toward the chassis 20 and is fixed to the chassis 20. is doing.

The distal end of the fixing portion 37 is a pair of elastic locking pieces 37A. The pair of elastic locking pieces 37A is formed by recessing the distal end portion of the fixed portion 37, and elastically in a direction (Y-axis direction) in which the opposing distance between the pair of elastic locking pieces 37A decreases. It is possible to bend and deform.

As shown in FIG. 6, the fixing portion 37 includes an insertion hole 31 A formed in the light reflecting sheet 30 (sheet body portion 31), an insertion hole 45 A formed in the LED substrate 45, and an insertion hole 21 A formed in the bottom plate 21. It is the structure inserted in. When the pair of elastic locking pieces 37A are inserted from the front side of the bottom plate 21 (upper side in FIG. 6) into the insertion holes 31A, 45A, and 21A, the pair of elastic locking pieces 37A are bent and deformed in a direction in which the opposing interval becomes smaller. The insertion holes 31A, 45A and 21A can be inserted. In addition, the pair of elastic locking pieces 37A passes through the insertion hole 21A and reaches the back side of the bottom plate 21 (downward in FIG. 5), and then elastically returns to be locked to the back surface of the bottom plate 21. It has become.

The LEDs 40 are arranged in parallel in a straight line along the long side direction (X-axis direction) of the LED substrate 45 and are connected in series by a wiring pattern formed on the LED substrate 45, for example. The arrangement pitch of the LEDs 40 is substantially constant. That is, the LEDs 40 are arranged at equal intervals. Moreover, the connector part 18a is provided in the both ends of the long side direction in the LED board 45. As shown in FIG.

As shown in FIG. 3, a plurality of LED units U are arranged in parallel in the chassis 20 in a state where the long side direction and the short side direction are aligned with each other in the X-axis direction and the Y-axis direction. That is, the LED unit U, and hence the LED 40 and the diffusing lens 50, are both in the X-axis direction (the longer side direction of the chassis 20 and the LED substrate 45) in the chassis 20 and the Y-axis direction (the chassis 20 and the LED substrate 45 is connected) A plurality of rows are arranged in a matrix with the short side direction as the column direction.

In this embodiment, two types of LED units U having different long side dimensions of the LED substrate 45 and the number of LEDs 40 to be mounted are used. Specifically, as the LED substrate 45, a long side dimension is relatively long and a six-mounting type in which six LEDs 40 are mounted, and a long side dimension is relatively short and five LEDs 40 are mounted. The five mounted type is used. One six-mounting type LED board 45 is disposed at each end position in the X-axis direction of the chassis 20, and one five-mounting type LED board 45 is disposed at the center position in the same direction.

As described above, a method of preparing a plurality of types (in this embodiment, two types) of LED substrates 45 having different long side dimensions and the number of LEDs 40 to be mounted, and appropriately combining these different types of LED substrates 45 is used. By adopting it, when manufacturing various types of liquid crystal display devices 10 having different screen sizes, it is possible to easily cope with them by appropriately changing the combination of two types of LED substrates 45 and the number of used ones in accordance with each screen size. it can.

For this reason, compared with the case where the LED board of the special design which has a long side dimension equivalent to the long side dimension of the chassis 20 is prepared for every screen size, the kind of required LED board 45 can be reduced significantly. Therefore, the manufacturing cost can be reduced. The number of LEDs 40 mounted on the LED substrate 45 is not limited to the above-described number (5 or 6), and can be changed as appropriate. Moreover, you may use combining the 3 or more types of LED board 45 from which the number of LED40 differs.

The LED boards 45 forming one row along the X-axis direction are electrically connected to each other by fitting and connecting adjacent connector portions 18a to each other, and in the X-axis direction of the chassis 20. Connector portions 18a corresponding to both ends are electrically connected to an external control circuit (not shown). As a result, the LEDs 40 arranged on the LED boards 45 in one row are connected in series, and the lighting and extinguishing of a large number of LEDs 40 included in the row are collectively controlled by a single control circuit. Therefore, it is possible to reduce the cost.

The diffusion lens 50 is formed of a transparent member (for example, acrylic or polycarbonate) having a refractive index higher than that of air, and refracts light emitted from the LED 40 (has an optical effect on light from the light source). It is responsible for the function of spreading. As shown in FIGS. 4 and 6, the diffusing lens 50 has a circular shape in plan view, and the LED 40 is arranged at the center thereof. That is, the diffusion lens 50 is disposed on the LED substrate 45 so as to cover the light emitting surface 40 A of the LED 40. Further, the diffusing lens 50 includes a flat plate portion 54 having a flat plate shape in a plan view and a flat spherical portion 55 having a flat hemispherical shape.

On the lower surface of the diffusing lens 50, a concave portion 50A having a substantially conical shape is formed by denting a portion corresponding to a position directly above the LED 40 to the front side (upper side in FIG. 6). Further, a concave portion 50 B having a substantially mortar shape is formed on the top of the diffusing lens 50. The inner peripheral surface of the recess 50B has, for example, an arc shape in cross-sectional view.

With the above configuration, the light emitted from the LED 40 is refracted at a wide angle at the boundary between the diffusing lens 50 and the air and diffused around the LED 40 (indicated by the light beam L1). A part of the light emitted from the LED 40 is reflected at the boundary between the diffusing lens 50 and the air in the recess 50B (indicated by the light beam L2). As a result, the phenomenon that the top of the diffusing lens 50 becomes brighter than its periphery can be prevented, and uneven brightness can be suppressed.

As shown in FIGS. 4 and 6, the diffusing lens 50 has three mounting legs 53 that are substantially cylindrical. Each mounting leg portion 53 protrudes from the peripheral portion of the flat plate portion 54 to the back side. The three mounting legs 53 are arranged at substantially equal intervals (at intervals of about 120 degrees) from the center of the diffusion lens 50 (and thus the flat plate portion 54) in plan view. In addition, in FIG. 4, the attachment leg part 53 and a part of adhesive agent 60 mentioned later are shown in figure by the broken line.

Each mounting leg 53 is bonded to the surface of the LED substrate 45 by an adhesive 60 (first fixing member or second fixing member). Specifically, as shown in FIG. 6, the lower part (the LED board 45 side) of the attachment leg 53 is bonded to the LED board 45 with an adhesive 60. As a result, the diffusing lens 50 is fixed to the LED substrate 45. That is, the diffusing lens 50 is fixed to the chassis 20 via the LED substrate 45. Further, as shown in FIG. 4, the adhesive 60 is arranged in a shape that covers the periphery of the mounting leg 53 in a plan view (a shape that surrounds the periphery), and holds the mounting leg 53 over the entire circumference. It is the composition to do.

Note that, as shown in FIG. 6, the adhesive 60 has a substantially cylindrical shape whose outer diameter decreases toward the liquid crystal panel 11 (upper side in FIG. 6). That is, the surface 60A (surface 61A and surface 62A described later) of the adhesive 60 is an inclined surface that is inclined to the liquid crystal panel 11 side toward the mounting leg 53 (attachment leg 53A and mounting leg 53B described later). Is done. Note that the shape of the adhesive 60 is not limited to the above-described shape (substantially cylindrical), and can be changed as appropriate. For example, the adhesive 60 may be substantially hemispherical (droplet-like) or the like, and the surface 60A of the adhesive 60 may be substantially spherical (curved).

As described above, in the present embodiment, a plurality of LEDs 40 are arranged in a matrix in the chassis 20, and the diffusing lens 50 is arranged corresponding to each LED 40 (see FIG. 3). In the present embodiment, the mode of the adhesive 60 for fixing the diffusion lens 50 is different depending on the location where the LED 40 is disposed.

In order to specifically describe this configuration, in the following description, among the plurality of LED substrates 45, the LED substrate 45 disposed at both ends in the short side direction (Y-axis direction) of the chassis 20 is the end LED substrate. 46 (light source board), and the LED board 45 other than the end side LED board 46 is called a center side LED board 47 (light source board). That is, the center LED board 47 is arranged on the center side of the bottom plate 21 as compared to the end LED board 46.

In the following description, the LED 40 mounted on the end-side LED board 46 is referred to as an end-side LED 42 (second light source), and the LED 40 mounted on the center-side LED board 47 is referred to as the center-side LED 41 (first light source). (Refer to FIG. 5).

In the following description, among the diffusing lenses 50, the diffusing lens 50 that covers the end-side LED 42 is referred to as an end-side diffusing lens 52 (second optical element), and the diffusing lens that covers the center-side LED 41 is the center-side diffusing lens. It shall be called 51 (first optical element). 3 and 4, the diffusing lens 50 surrounded by the alternate long and short dash line E1 is the central diffusing lens 51, and the diffusing lens 50 surrounded by the alternate long and short dash line E2 is the end side diffusing lens 52.

That is, the end side LED 42 is a light source disposed on the end side (side closer to the peripheral end) of the chassis 20 as compared to the center side LED 41. More specifically, the center side LED 41 is an LED arranged on the center side in the arrangement direction among the plurality of LEDs 40 arranged in the short side direction (one side direction) of the bottom plate 21, and the end side LED 42 is Among the plurality of LEDs 40 arranged in the short side direction (one side direction) of the bottom plate 21, the LEDs are respectively arranged on both end sides in the arrangement direction.

In the present embodiment, as shown in FIG. 5, the adhesive 60 (second fixing member, which will be referred to as the second adhesive 62 in the following description) for adhering the end side diffusion lens 52 is diffused in the center. The volume (application amount) is smaller than the adhesive 60 (first fixing member, which will be referred to as the first adhesive 61 in the following description) for bonding the lens 51.

In the following description, reference numeral 53B is given to the mounting leg 53 (second mounting leg) of the end side diffusion lens 52, and the mounting leg 53 (first mounting leg) of the center side diffusion lens 51 is marked. Reference numeral 53A is attached.

The adhesive 60 is assumed to exhibit a black color. Therefore, the surface 61A (first light absorption surface) of the first adhesive 61 on the liquid crystal panel 11 side (illumination light emission side of the illumination device) and the liquid crystal panel 11 side of the second adhesive 62 (illumination of the illumination device). The surface 62A (second light absorption surface) on the light emission side is assumed to exhibit black color.

That is, the surface 61A of the first adhesive 61 and the surface 62A of the second adhesive 62 are light absorption surfaces capable of absorbing light. Thereby, the surface 61A of the 1st adhesive agent 61 and the surface 62A of the 2nd adhesive agent 62 become a structure which can absorb the light from each LED40.

In addition, as for the adhesive agent 60 (1st adhesive agent 61 and 2nd adhesive agent 62) which exhibits black, for example, when the adhesive agent 60 is a material with high transparency, a black paint is included in the inside of the adhesive agent 60. Can be formed. Alternatively, a black material may be used as the adhesive 60. The light absorbing surface may be formed by applying a black paint to the surface 60A of the adhesive 60.

Further, as described above, the surface 61A of the first adhesive 61 is an inclined surface that inclines toward the liquid crystal panel 11 (illumination light emission side of the illuminating device) toward the mounting leg 53A. The surface 62A of the agent 62 is an inclined surface that inclines toward the liquid crystal panel 11 toward the mounting leg 53B. Accordingly, the surface 60A (61A or 62A) of the adhesive 60 is emitted along the extending direction of the bottom plate 21 (light having a relatively small emission angle with respect to the extending surface of the bottom plate 21, FIGS. 6 and 7). In this case, the light beam L3 to L5 is easily reached, and such light is easily absorbed.

The first adhesive 61 and the second adhesive 62 have a substantially circular shape (more precisely, an annular shape surrounding the mounting leg) in the plan view shown in FIG. 4, and the outer diameter of the second adhesive 62. Is smaller than the outer diameter of the first adhesive 61. As shown in FIGS. 6 and 7, the thickness of the second adhesive 62 (height from the surface of the LED substrate 45) is smaller than the thickness of the first adhesive 61. Accordingly, the surface 62A of the second adhesive 62 has a smaller area than the surface 61A of the first adhesive 61.

Next, the effect of this embodiment will be described. In the present embodiment, the end side diffusion lens 52 is fixed to the chassis 20 rather than the surface 61A (first light absorption surface) of the first adhesive 61 that fixes the center side diffusion lens 51 to the chassis 20. The area of the surface 62A (second light absorption surface) of the second adhesive 62 is set to be small.

With such a configuration, when the light emitted from each LED 40 is directed to the vicinity of the first adhesive 61 and the second adhesive 62, the surface 62A of the second adhesive 62 having a relatively small area is used. Compared to the surface 61A of the first adhesive 61, light is less likely to reach and is not easily absorbed. In other words, light is more likely to be reflected near the surface 62 A of the second adhesive 62 than near the surface 61 A of the first adhesive 61.

This will be schematically described with reference to FIGS. In FIG. 6, an example of light reaching the surface 61A of the first adhesive 61 out of light passing around the first adhesive 61 is indicated by light rays L3 and L4. The light that reaches the surface 61A is absorbed by the first adhesive 61 (mostly).

Further, in FIG. 7, an example of light reaching the surface 62A of the second adhesive 62 out of the light passing around the second adhesive 62 is indicated by a light beam L5. In FIG. 7, an example of light that has not reached the surface 62 A of the second adhesive 62 out of the light that passes around the second adhesive 62 is indicated by a light beam L 6.

That is, the light indicated by the light beam L5 (light that has reached the second adhesive 62) is absorbed by the second adhesive 62. On the other hand, the light indicated by the light beam L6 does not reach the second adhesive 62 and is not absorbed. Such light indicated by the light beam L6 (light that does not reach the second adhesive 62) is reflected by the components of the backlight device 12 (for example, the light reflecting sheet 30, the LED substrate 45, the diffusing lens 50, etc.), and the liquid crystal There is a possibility of going to the panel 11 side.

In FIGS. 6 and 7, as an example of the light passing through the periphery of the adhesive 60, the light emitted from the LED 40 and then reflected by the diffusing lens 50 so as to travel toward the adhesive 60 is expressed as a light beam L2. , L7. For example, the light indicated by the light beam L2 in FIG. 6 is absorbed by the first adhesive 61, while the light indicated by the light beam L7 in FIG. 7 does not reach the second adhesive 62. For example, the light indicated by the light beam L7 is reflected by the surface of the end-side LED substrate 46 and travels toward the liquid crystal panel 11 side.

In the vicinity of the surface 62A of the second adhesive 62 having a relatively small area, light that tries to pass through the periphery thereof is less likely to be absorbed than in the vicinity of the surface 61A of the first adhesive 61 having a relatively large area. That is, the surrounding light is easily reflected in the vicinity of the second adhesive 62, and the surrounding light is hardly reflected in the vicinity of the first adhesive 61.

In the configuration in which the LEDs 40 are arranged on the chassis 20 (bottom plate 21) as in this embodiment, the luminance of the end portion of the chassis 20 tends to be lower than that of the central portion. In this regard, in the present embodiment, the backlight device 12 (chassis 20) is configured such that ambient light is likely to be reflected on the end side (in the vicinity of the second adhesive 62) where the luminance tends to be low, and the luminance is high. On the central side (in the vicinity of the first adhesive 61) that is likely to be formed, ambient light is not easily reflected.

As a result, a situation (luminance unevenness) in which a difference occurs between the brightness on the center side (center LED 41 side) and the brightness on the end side (end side LED 42 side) in the backlight device 12 (chassis 20) is suppressed. The luminance of the backlight device 12 can be made uniform.

Further, in the present embodiment, luminance unevenness can be suppressed by setting the size of the light absorbing surface of the adhesive 60 (first fixing member and second fixing member) for fixing the diffusion lens 50. That is, it is not necessary to provide a dedicated member for suppressing luminance unevenness, and a simple configuration can be achieved.

In the above configuration, the LED 40 is fixed to the chassis 20, the LED 40 is mounted, and the diffusion lens 50 is fixed, and the first fixing member bonds the central diffusion lens 51 to the central LED substrate 47. The second fixing member is a second adhesive 62 that adheres the end-side diffusion lens 52 to the end-side LED substrate 46.

If the first fixing member and the second fixing member are adhesives, the center side diffusion lens 51 and the end side diffusion lens 52 can be easily fixed to the LED substrate 45.

In addition, the first light absorption surface is a surface 61 A on the emission side of the illumination light of the backlight device 12 in the first adhesive 61, and the second light absorption surface is an illumination of the backlight device 12 in the second adhesive 62. A surface 62A on the light emission side is used.

The center-side diffusing lens 51 is attached to the center-side LED substrate 47 and has a column-shaped mounting leg portion 53A. The first adhesive 61 is arranged so as to cover the periphery of the mounting leg portion 53A in plan view. The end-side diffusing lens 52 is attached to the end-side LED board 46 and has a column-shaped mounting leg 53B, and the second adhesive 62 surrounds the mounting leg 53B in a plan view. It is arranged in a covering form.

With such a configuration, the mounting leg 53A can be more reliably fixed by the first adhesive 61, and the mounting leg 53B can be more reliably fixed by the second adhesive 62.

Further, the surface 61A of the first adhesive and the surface 62A of the second adhesive can be black. By making the surface black, the light absorption surface can be easily formed.

The chassis 20 includes a plurality of LEDs 40 including a central LED 41 and an end LED 42, and the central LED 41 is arranged on the central side in the arrangement direction of the plurality of LEDs 40 among the plurality of LEDs 40. The end-side LEDs 42 are arranged on both end sides of the plurality of LEDs 40 in the arrangement direction of the plurality of LEDs 40, respectively.

When a plurality of LEDs 40 are arranged, both ends of the plurality of LEDs 40 are likely to have lower luminance than the central portion. For this reason, the LED 40 arranged on both ends is the end side LED 42, that is, the LED 40 corresponding to the second adhesive 62 that is relatively difficult to absorb light, so that the luminance can be increased over the arrangement direction of the plurality of LEDs 40. It can be made uniform.

Further, the chassis 20 has a rectangular bottom plate 21, and the plurality of LEDs 40 may be arranged along one side direction of the bottom plate 21. With such a configuration, it is possible to make the luminance uniform over one side direction of the bottom plate 21.

Also, an LED 40 (light emitting diode) is used as a light source. As a result, high luminance can be achieved and power consumption can be suppressed.

Further, the center side diffusion lens 51 can be a diffusion lens that diffuses the light from the center side LED 41. Luminance unevenness can be further reduced by providing a diffusion lens.

Further, the end side diffusion lens 52 can be a diffusion lens that diffuses light from the end side LED 42. Luminance unevenness can be further reduced by providing a diffusion lens.

The chassis 20 further includes an opening 24 that emits light from the center side LED 41 and the end side LED 42, and further includes an optical member 15 arranged to cover the opening 24. A diffusion plate 15a having a function of diffusing light from the center side LED 41 and the end side LED 42, and a function of condensing the light transmitted through the diffusion plate 15a or a function of diffusing the light transmitted through the diffusion plate 15a. And an optical sheet 15b having one function.

With such a configuration, the light emitted from the opening 24 of the chassis 20 is transmitted through the diffusion plate 15a and the optical sheet 15b, and the luminance of the backlight device 12 can be made even more uniform.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. The same parts as those in the above embodiment are denoted by the same reference numerals, and redundant description is omitted. In the backlight device 112 of this embodiment, the arrangement locations of the first adhesive 61 and the second adhesive 62 are partly different from those of the above embodiment.

As shown in FIGS. 8 and 9, in the present embodiment, of the plurality of diffusion lenses 50 arranged in a matrix on the bottom plate 21 of the chassis 20, both end portions in the long side direction (X-axis direction) of the bottom plate 21. And each adhesive 60 which adhere | attaches each diffuser lens 50 (end part side diffuser lens 52) arrange | positioned at the both ends in a short side direction (Y-axis direction) is the 2nd adhesive agent 62 (adhesive with a relatively small surface area). The adhesive 60 that bonds the other diffusion lens 50 (central diffusion lens 51) is the first adhesive 61 (an adhesive having a relatively large surface area).

That is, in the backlight device 112 of the present embodiment, in addition to the LED substrate 45 on which only the first adhesive 61 is disposed, the LED substrate 45 on which only the second adhesive 62 is disposed, the first adhesive 61 and the first adhesive 61 2 is provided with an LED substrate 45 (reference numeral 145) on which both adhesives 62 are arranged, and the end side diffusion lenses 52 are arranged in a rectangular frame shape so as to surround the four sides of the center side diffusion lens 51. ing.

With such a configuration, it is possible to suppress the occurrence of luminance unevenness between the outer peripheral end portion (the end portion in the long side direction and the end portion in the short side direction) of the bottom plate 21 and the central portion. 8 and 9, the diffusing lens 50 surrounded by a one-dot chain line E3 is a center-side diffusing lens 51 (a diffusing lens bonded by the first adhesive 61), and the diffusing lens surrounded by the one-dot chain line E4. Reference numeral 50 denotes an end side diffusion lens 52 (a diffusion lens bonded with the second adhesive 62).

<Embodiment 3>
Next, a third embodiment of the present invention will be described with reference to FIGS. The same parts as those in the above embodiment are denoted by the same reference numerals, and redundant description is omitted. In the above embodiment, a so-called direct-type backlight device has been exemplified. On the other hand, the liquid crystal display device 210 of the present embodiment includes an edge light type backlight device 212 in which an LED 240 as a light source is arranged on the edge of the chassis 220.

As shown in FIGS. 10 and 11, the backlight device 212 includes a chassis 220 having a substantially box shape opened on the light emitting surface side (the liquid crystal panel 11 side), and an optical member disposed along the long side of the chassis 220. 15 and a frame 216 that holds and holds the 15 long side edge portions with the chassis 220. In the chassis 220, an LED unit U1 including the LED 240, a light guide plate 270 that guides light generated from the LED 240 to the liquid crystal panel 11 side, and a holder 218 on which the edge of the optical member 15 is placed are arranged. Yes.

As shown in FIG. 11, the LED unit U1 covers an LED substrate 245 (light source substrate) having a longitudinal shape, a plurality of LEDs 240 arranged along the longitudinal direction of the LED substrate 245, and a light emission surface 240A of the LED 240. A diffusing lens 250 is provided. The LED substrate 245 is attached to the long side outer edge portion 221 (side plate) of the chassis 220 by, for example, screwing or the like.

The light guide plate 270 is a rectangular plate-like member, and is formed of a resin having high translucency (high transparency) such as acrylic. As shown in FIG. 10, the light guide plate 270 has the main plate surface (light emission surface 270 A) facing the diffusion plate 15 a, and one surface (light incident surface 270 B) of the side plate faces the light emission surface 240 A of each LED 240. It is arranged in the form to do. The light incident surface 270B of the light guide plate 270 has a rectangular shape in plan view, and each LED 240 and each diffusion lens 250 are arranged along the long side direction (one side direction) of the light incident surface 270B.

The light generated from the LED 240 is diffused by the diffusion lens 250 and then enters from the light incident surface 270 B of the light guide plate 270. The light that has entered the light guide plate 270 from the light incident surface 270B is guided in the light guide plate 270 by total reflection and is emitted from the entire surface of the light output surface 270A that faces the diffuser plate 15a. Then, light emitted from the light emission surface 270 A is applied to the back side of the liquid crystal panel 11.

In the present embodiment, in the LED substrate 245, the application amount (volume) of the second adhesive 262 (second fixing member) disposed on both ends in the longitudinal direction is the first disposed on the center side in the longitudinal direction. The applied amount (volume) of the adhesive 261 (first fixing member) is smaller. Thereby, the area of the surface 262A (second light absorption surface) of the second adhesive 262 is smaller than the area of the surface 261A (first light absorption surface) of the first adhesive 261.

The first adhesive 261 and the second adhesive 262 are, for example, black. As shown in FIG. 11, the second adhesive 262 includes LEDs 240 (end-side LEDs 242, first-side LEDs 242) arranged at both ends in the arrangement direction (X-axis direction) among the LEDs 240 arranged in the longitudinal direction of the LED substrate 245. The diffusion lens 250 (the end side diffusion lens 252 and the second optical element) covering the two light sources) is bonded to the LED substrate 245.

Further, the first adhesive 261 is a diffusion lens 250 (center side diffusion lens 251) that covers the LEDs 240 (center side LED 241, first light source) other than the end side LED 242 among the LEDs 240 arranged in the longitudinal direction of the LED substrate 245. , The first optical element) is adhered to the LED substrate 245.

The first adhesive 261 adheres the mounting leg 253A (first mounting leg) of the center side diffusion lens 251 to the LED substrate 245, and the second adhesive 262 uses the mounting leg of the end side diffusion lens 252. The portion 253B (second mounting leg portion) is bonded to the LED substrate 245.

In the present embodiment, the area of the surface 262A of the second adhesive 262 is smaller than the area of the surface 261A of the first adhesive 261). Thereby, the situation where a brightness nonuniformity arises between the both ends in the long side direction of LED unit U1 (location where the luminance is likely to be lower than the central portion) and the central portion can be suppressed. For this reason, in the light emitted from the light guide plate 270, it is possible to suppress the occurrence of uneven brightness over the long side direction (X-axis direction) of the light guide plate 270.

<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) In the first embodiment or the second embodiment, among the diffusing lenses 50 arranged in a matrix, the diffusing lenses 50 are arranged at four corners (corners, that is, ends in the long side direction and the short side direction in the chassis 20). Only the adhesive 60 of the diffusing lens 50 may be the second adhesive 62 and the other adhesive 60 may be the first adhesive 61.

(2) In the first to third embodiments, the light absorbing surface is formed by making the adhesive 60 black, but the present invention is not limited to this. The color of the adhesive 60 can be appropriately changed as long as it can absorb light.

(3) The

second adhesives

62 and 262 may be disposed on the end side relative to the

first adhesives

61 and 261 and may not be disposed on the outermost end of the chassis.

(4) The

first adhesives

61 and 261 and the

second adhesives

62 and 262 are not limited to the same shape (both are substantially cylindrical in the above embodiment), and may have different shapes.

(5) In the above embodiment, the configuration using only two types of adhesives (first adhesive 61 and second adhesive 62) having different surface areas as the adhesive 60 is illustrated, but the present invention is not limited to this. For example, a configuration in which the surface area of the adhesive 60 gradually decreases from the center side of the chassis 20 toward the end portion may be employed.

(6) In the above embodiment, the

adhesives

60, 261, and 262 are exemplified as the fixing members (the first fixing member and the second fixing member) that fix the

diffusion lenses

50 and 250. However, the present invention is not limited to this. The fixing member only needs to be able to fix the optical element (diffuse lens) to the LED substrate (and thus the chassis). For example, a thermosetting resin or a screw whose surface is a light absorption surface may be used. .

(7) The mounting legs 53 and 253 in the

diffusion lenses

50 and 250 are not limited to a cylindrical shape. For example, the mounting legs 53 and 253 may be prismatic. Further, the

diffusion lenses

50 and 250 may not have the mounting legs 53 and 253. That is, the location where the

diffusion lenses

50 and 250 are fixed by the

adhesives

60, 261 and 262 is not limited to the mounting legs 53 and 253. For example, the lens portions of the diffusion lenses 50 and 250 (locations other than the mounting leg portions 53 and 253) may be bonded to the

LED substrates

45 and 245 with the

adhesives

60, 261, and 262.

(8) In the above embodiment, the

diffusion lenses

50 and 250 are exemplified as the optical elements (the first optical element and the second optical element), but the present invention is not limited to this. The optical element may be any element that exerts an optical action on the light from the LEDs 40 and 240 (light source). For example, a condensing lens may be used. Moreover, although the said embodiment illustrated the structure (structure indirectly fixed with respect to a chassis) in which the diffusion lens was fixed to the LED board, it is not limited to this. The diffusion lens may be fixed directly or indirectly to the chassis.

(9) In each of the above-described embodiments, the case where the LED chip that emits white light with a phosphor is incorporated and the LED 40 that emits white light in a single color has been shown. However, the configuration of the LED 40 is not limited thereto. It is a change as appropriate. For example, you may use the type of LED which incorporated three types of LED chips which respectively light-emit R, G, B.

(10) In each of the embodiments described above, the case where the LED is used as the light source is exemplified, but a light source of a type other than the LED may be used. For example, in addition to the LED, a linear light source such as a cold cathode tube or a hot cathode tube may be used, or a planar light source such as an organic EL may be used.

(11) In the above embodiment, as the type of the optical sheet 15b, a diffusion sheet having a function of diffusing light, a lens sheet having a function of condensing light, and the like are exemplified, but the optical sheet has a function of condensing light. Also, it may have a function of diffusing light.

(12) In each of the above-described embodiments, the liquid crystal panel and the chassis are illustrated in a vertically placed state in which the short side direction coincides with the vertical direction. Those that are in a vertically placed state matched with are also included in the present invention.

(13) 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.

(14) In each of the above-described embodiments, the liquid crystal display device using the liquid crystal panel as the display panel is exemplified, but the present invention can be applied to a display device using another type of display panel.

(15) In each of the above-described embodiments, the television receiver provided with the tuner is exemplified, but 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 device), 11 ... Liquid crystal panel (display panel), 12, 112 ... Backlight device (illumination device), 15 ... Optical member, 15a ... Diffusing plate, 15b ... Optical sheet, 20, 220 ... Chassis, 21 ... bottom plate, 24 ... opening (light emitting part), 40, 240 ... LED (light source), 40A, 240A ... light emitting surface (light emitting surface of the first light source, light emitting surface of the second light source), 41, 241 ... center side LED (first light source, light emitting diode), 42, 242 ... end side LED (second light source, light emitting diode), 45 ... LED substrate (light source substrate), 51, 251 ... center side diffusion lens (First optical element), 52, 252 ... end side diffusion lens (second optical element), 61, 261 ... first adhesive (first fixing member), 61A, 261A ... surface of the first adhesive (first 1 light absorption surface), 62,262 Second adhesive (second fixing member), 62A, 262A ... surface of second adhesive (second light absorbing surface), 53A, 253A ... mounting leg (first mounting leg), 53B, 253B ... mounting leg Part (second mounting leg), TV ... TV receiver

Claims

The chassis,
A first light source disposed in the chassis;
A second light source disposed on an end side of the chassis in the chassis,
In the chassis, a first optical element that is disposed so as to cover a light emitting surface of the first light source and that exerts an optical action on light from the first light source;
In the chassis, a second optical element that is disposed so as to cover a light emitting surface of the second light source, and that exerts an optical action on light from the second light source;
A first fixing member having a first light absorbing surface capable of absorbing light, and fixing the first optical element to the chassis;
And a second fixing member that has a second light absorption surface that can absorb light and has a smaller area than the first light absorption surface, and that fixes the second optical element to the chassis.
A light source substrate fixed to the chassis, on which the first light source and the second light source are mounted, and on which the first optical element and the second optical element are fixed;
The first fixing member is a first adhesive that bonds the first optical element to the light source substrate;
The lighting device according to claim 1, wherein the second fixing member is a second adhesive that bonds the second optical element to the light source substrate.
The first light absorption surface is a surface on the emission side of the illumination light of the illumination device in the first adhesive,
The lighting device according to claim 2, wherein the second light absorption surface is a surface of the second adhesive on the side where the illumination light is emitted from the lighting device.
The first optical element is attached to the light source substrate, and has a first attachment leg portion having a columnar shape,
The first fixing member is arranged so as to cover the periphery of the first mounting leg in a plan view.
The second optical element is attached to the light source substrate, and has a second attachment leg portion having a columnar shape,
The lighting device according to claim 2, wherein the second fixing member is disposed so as to cover a periphery of the second mounting leg portion in a plan view.
The lighting device according to any one of claims 1 to 4, wherein the first light absorption surface and the second light absorption surface are black.
A plurality of light sources including the first light source and the second light source are arranged in the chassis,
The first light source is a light source arranged on the center side in the arrangement direction of the plurality of light sources among the plurality of light sources,
6. The lighting device according to claim 1, wherein the second light source is a light source disposed on each of both end sides in the arrangement direction of the plurality of light sources among the plurality of light sources.
The chassis has a square bottom plate;
The lighting device according to claim 6, wherein the plurality of light sources are arranged along one side direction of the bottom plate.
The lighting device according to any one of claims 1 to 7, wherein at least one of the first light source and the second light source is a light emitting diode.
The illumination device according to any one of claims 1 to 8, wherein the first optical element is a diffusing lens that diffuses light from the first light source.
The lighting device according to any one of claims 1 to 9, wherein the second optical element is a diffusion lens that diffuses light from the second light source.
The chassis has a light emitting part for emitting light from the first light source and the second light source,
An optical member disposed so as to cover the light emitting portion;
The optical member has a function of diffusing light from the first light source and the second light source, a function of condensing light transmitted through the diffusion plate, or diffusing light transmitted through the diffusion plate. The lighting device according to claim 1, further comprising an optical sheet having at least one of functions.
The lighting device according to any one of claims 1 to 11,
A display panel that performs display using light from the illumination device.
The display device according to claim 12, wherein the display panel is a liquid crystal panel using liquid crystal.
A television receiver comprising the display device according to claim 12 or 13.