JP2013247646A - Image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device capable of effectively emitting ion mist to a user himself or user's living space.SOLUTION: An image display device 10 comprises: a display panel; a power circuit 71; a signal processing circuit 75; and an ion mist emission unit 100 emitting ion mist disposed at a position away from the power circuit 71 and the signal processing circuit 75 on the rear face of the display panel. The ion mist emission unit 100 comprises: an ion generating section 110 that generates ion mist; a fan 120 that blows ion mist generated by the ion generating section 110 into a viewing space in front of the display panel; a control circuit 130 that controls the operation of the ion mist generating section 110 and the fan 120; and a housing 140 that holds the ion generating section 110, the fan 120, and the control circuit 130 and thermally separates the inside of the ion mist emission unit 100 from the power circuit 71 and the signal processing circuit 75.

Description

  The present invention relates to an image display device, and more particularly to an image display device having a function of generating ion mist.

  Nano-sized mist-like negative ions (hereinafter referred to as “ion mist”) include, for example, the effect of collecting dust floating in the air, the effect of moisturizing skin and hair, deodorization and Effects such as sterilization are known.

  And the electrostatic atomizer which generates ion mist is disclosed by patent document 1, for example. The electrostatic atomizer disclosed in Patent Document 1 generates ion mist by applying a high voltage to the electrode in a state where condensation occurs around the electrode. In addition, the apparatus for generating ion mist is not only a dedicated apparatus as in Patent Document 1, but also various electric appliances such as a vacuum cleaner, a hair dryer, a washing machine, and a refrigerator having a function of generating ion mist. It has been.

JP 2010-264455 A JP 2010-133671 A JP 2011-200371 A Japanese Utility Model Publication No. 3-43629

  However, among the electric appliances described above, the vacuum cleaner and the hair dryer release the ion mist only when they are used, and the washing machine and the refrigerator release the ion mist only within these. As a result, the ion mist released by these electrical appliances exerts the above-described effects only in a limited range in terms of time or space.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an image display device capable of effectively releasing ion mist to the user himself or his / her living space.

  An image display device according to an embodiment of the present invention includes a display panel, a drive circuit that is disposed on the back surface of the display panel and displays an image on the display panel, and a position spaced apart from the drive circuit on the back surface of the display panel And an ion mist emission unit for emitting ion mist. The ion mist discharge unit includes: an ion generator that generates ion mist; a blower that discharges the ion mist generated by the ion generator to a viewing space in front of the display panel; and the ion mist generation And a control circuit that controls the operation of the blower, and a case that holds the ion generation unit, the blower, and the control circuit and that thermally isolates the interior from the drive circuit.

1 is an external perspective view of the front side of a television receiver 10. FIG. 2 is an external perspective view of the back side of the television receiver 10. FIG. 1 is a diagram illustrating an internal structure of a television receiver 10. 4 is a rear view of the back cover 40. FIG. 4 is a perspective view of the upper surface side (front surface side) of a housing 140. FIG. 4 is a perspective view of a lower surface side (back surface side) of a housing 140. FIG. FIG. 6 is a plan view of an upper region 141 of the housing 140 and a rear view of the lid 150. It is a figure which shows typically the structure of the inlet 112a of the 2nd air path 112. FIG. 2 is a schematic diagram showing a configuration of an ion generator 113. FIG. It is a perspective view which shows the positional relationship of the louver 50 and the light source 60. FIG. 3 is an enlarged front view of a louver 50 and a light source 60. FIG.

(Knowledge that became the basis of the present invention)
Usually, a television receiver is installed indoors with a display panel facing a user's living space. Therefore, if ion mist is discharged toward the space in front of the display panel of the television receiver (hereinafter referred to as “viewing space”), the ion mist is effectively supplied to the user himself / herself or to the user's living space. It is considered possible.

  When the ion mist is emitted from the television receiver, the ion mist emission unit is preferably installed on the back surface of the display panel. However, a drive circuit for displaying an image on the display panel is disposed on the back surface of the display panel, and there is a problem that the ion mist emission unit must be protected from heat generated from the drive circuit.

  In order to solve the above problems, a television receiver 10 according to an embodiment of the present invention is provided with a display panel 20 and drive circuits 71 and 75 that are arranged on the back surface of the display panel 20 and display an image on the display panel 20. And an ion mist emission unit 100 that is arranged at a position separated from the drive circuits 71 and 75 on the back surface of the display panel 20 and emits ion mist. The ion mist emission unit 100 includes an ion generation unit 110 that generates ion mist, a fan 120 that discharges the ion mist generated by the ion generation unit 110 to a viewing space in front of the display panel 20, and an ion mist generation. A control circuit 130 that controls the operation of the unit 110 and the fan 120, and a housing 140 that holds the ion generation unit 110, the fan 120, and the control circuit 130 and that thermally isolates the interior from the drive circuits 71 and 75. Prepare.

(Embodiment)
Hereinafter, an image display device according to one embodiment of the present invention will be specifically described with reference to the drawings. Note that each of the embodiments described below shows a specific example of the present invention. The numerical values, shapes, materials, constituent elements, arrangement positions and connecting forms of the constituent elements, steps, order of steps, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

  With reference to FIGS. 1-4, the structure of the television receiver 10 which is an example of the image display apparatus which concerns on this Embodiment is demonstrated. FIG. 1 is an external perspective view of the front side of the television receiver 10. FIG. 2 is an external perspective view of the rear side of the television receiver 10. FIG. 3 is a diagram showing the internal structure of the television receiver 10. FIG. 4 is a rear view of the back cover 40.

  As shown in FIGS. 1 and 2, the television receiver 10 mainly includes a display panel 20, a pedestal 30, a back cover 40, and a louver 50. The television receiver 10 has a tuner (not shown) that receives broadcast waves. In addition, a receiving circuit for receiving a signal via a network such as Ethernet (registered trademark), an input unit for receiving an input from an external device such as a recording device, and the like may be provided.

  The display panel 20 is a display that displays an image (video). Although the specific structure of the display panel 20 is not specifically limited, For example, a liquid crystal display, a plasma display, an organic EL (ElectroLuminescence) display, etc. are employable.

  The pedestal 30 supports the display panel 20 in an upright state. The pedestal 30 rotates the display panel 20 independently in the left-right direction and the up-down direction within a predetermined angle range. That is, the direction (angle) of the display panel 20 can be changed in a state where the television receiver 10 is placed on the placement surface.

  The back cover 40 is a cover that covers the back surface of the display panel 20. In the space formed between the display panel 20 and the back cover 40, as shown in FIG. 3, the power supply circuit 71, the signal processing circuit 75, and the ion mist emission unit 100 are separated from each other. Arranged. The drive circuit including the power supply circuit 71 and the signal processing circuit 75 is a circuit that is disposed on the back surface of the display panel 20 and displays an image on the display panel 20.

  In the example of FIG. 3, the ion mist emission unit 100 is disposed in the center of the space on the back surface (back surface) of the display panel 20, the power supply circuit 71 is disposed on the left side of the ion mist emission unit 100, and the ion mist emission unit 100. A signal processing circuit 75 is arranged on the right side of FIG. However, these arrangements are not limited to the example of FIG.

  For example, the positions of the power supply circuit 71 and the signal processing circuit 75 may be switched. That is, the power supply circuit 71 may be disposed on the left and right sides of the ion mist emission unit 100 and the signal processing circuit 75 may be disposed on the other side. On the other hand, from the viewpoint of emitting ion mist evenly throughout the viewing space, it is desirable to dispose the ion mist emission unit 100 in the center of the back surface of the display panel 20. Also, many conventional television receivers have a power supply circuit on one of the left and right sides and a signal processing circuit on the other side. Therefore, it can be said that providing the ion mist emission unit 100 in the center is preferable from the viewpoint of cost reduction in design / manufacturing.

  The power supply circuit 71 is a circuit that supplies power to the display panel 20, the signal processing circuit 75, and the ion mist emission unit 100. The power supply circuit 71 has a power supply socket 72 for receiving a power supply plug for supplying an external power supply (not shown). In the example of FIG. 3, the power socket 72 is disposed at the end of the power circuit 71 near the ion mist releasing unit 100 (that is, the lower right end).

  The signal processing circuit 75 is a circuit that receives power supplied from the power supply circuit 71 and processes an image signal to be displayed on the display panel 20. The signal processing circuit 75 typically includes a demultiplexer that separates an image signal from a broadcast wave received by a tuner, a decoder that decodes a separated video / audio signal, and an actual display panel 20 according to the video signal. The display panel 20 displays a picture (video) by causing each pixel of the display panel 20 to emit light in a desired color. In the signal processing circuit 75 of this embodiment, the tuner is also included in the circuit. Further, a terminal group 76 for acquiring an image signal from the outside (Internet, recording device, etc.) is provided. In this embodiment, the panel drive circuit is mounted in the signal processing circuit 75. However, as seen in many television receivers, the panel drive circuit is provided separately from the signal processing circuit 75. May be.

  The ion mist emission unit 100 receives supply of electric power from the power supply circuit 71, generates ion mist, and releases the generated ion mist to the outside of the television receiver 10. The ion mist discharge unit 100 according to the present embodiment discharges the ion mist upward in FIG.

  The ion mist emission unit 100, the display panel 20, and the signal processing circuit 75 are independently supplied with power from the power supply circuit 71. In other words, the ion mist emission unit 100 is not only in a state where an image is displayed on the display panel 20 (power-on state of the television receiver 10) but also in a state where no image is displayed on the display panel 20 (television image reception). The ion mist can be released even when the machine 10 is turned off.

  As shown in FIGS. 3 and 4, the ion mist discharge unit 100 includes an ion generator 110 that generates ion mist, and a fan (blower) 120 that discharges ion mist generated by the ion generator 110 to the outside. The control circuit 130 controls the operations of the ion generation unit 110 and the fan 120, and the casing 140 that holds the ion generation unit 110, the fan 120, and the control circuit 130.

  Further, as shown in FIG. 4, the back cover 40 exposes the power socket 72 and the terminal group 76 to the outside at positions facing the power socket 72 of the power circuit 71 and the terminal group 76 of the signal processing circuit 75. Through holes 41 and 42 are formed. Further, a vent hole 43 is formed in the back cover 40 at a position facing the central portion of the ion mist emitting unit 100 (that is, a position facing the fan 120).

  As shown in FIGS. 1 and 2, the louver 50 is attached to the center of the upper end of the back cover 40 and functions as a guiding member that guides the ion mist emitted from the ion mist emitting unit 100 to the viewing space. The louver 50 also functions as an indicator indicating that ion mist is released from the ion mist emission unit 100. The configuration and function of the louver 50 will be described later.

  Next, a specific configuration of the ion mist emission unit 100 will be described with reference to FIGS. FIG. 5 is a perspective view of the upper surface side (front surface side) of the housing 140. FIG. 6 is a perspective view of the lower surface side (back surface side) of the housing 140. FIG. 7 is a plan view of the upper region 141 of the housing 140 and a rear view of the lid 150. FIG. 8 is a diagram schematically showing the structure of the air inlet 112 a of the second air passage 112. FIG. 9 is a schematic diagram showing the configuration of the ion generator 113.

  First, as shown in FIG. 3 and FIG. 5, the housing 140 includes an upper region (first region) 141 that holds the ion generation unit 110 and a fan 120 in a state of being attached to the back surface of the display panel 20. The area is divided into a central area (second area) 142 to be held and a lower area (third area) 143 to hold the control circuit 130.

  As shown in FIGS. 5 and 6, the housing 140 has a bottom surface 140 a and three side surfaces 140 b, 140 c, and 140 d that are closed by outer walls, and an upper surface and one side surface (upper side when attached to the display panel 20. The side surface located at a substantially rectangular parallelepiped shape. And the housing | casing 140 is the state in which the part corresponding to the upper area | region 141 was closed with the lid | cover 150 among the upper surfaces (opening surface) of the housing | casing 140, and the part corresponding to the center area | region 142 and the lower area | region 143 was open | released. It is attached to the back surface of the display panel 20.

  On the other hand, the upper surface (opening surface) of the portion corresponding to the central region 142 and the lower region 143 is closed by the back cover 40. Further, as shown in FIG. 4, when the back cover 40 is attached to the back surface of the display panel 20, the back cover is positioned so as to surround the outside of the housing 140 (particularly, the central region 142 and the lower region 143). A protrusion 44 protruding from the back surface of 40 is formed.

  Further, as shown in FIGS. 2 and 4, the portion of the back cover 40 that holds the ion mist emission unit 100 is retracted from the portion that holds the power supply circuit 71 and the signal processing circuit 75 (that is, FIG. 4). Thus, when viewed from the back side, the center region of the back cover 40 is recessed from the left and right regions). Steps 45 and 46 (parts indicated by diagonal lines in FIG. 4) generated by the recess surround the casing 140 attached to the back surface of the display panel 20.

  In this way, the ion mist emission unit 100 is surrounded by the casing 140 and the lid 150, and is further surrounded by the protrusions 44 and the steps 45 and 46 of the back cover 40 (collectively referred to as “convex portions”). , It is possible to suppress the heat generated in the drive circuit (power supply circuit 71 and signal processing circuit 75) from being propagated to each component (ion generator 110, fan 120, and control circuit 130) of the ion mist emission unit 100. it can. That is, the ion mist emission unit 100 can be thermally isolated from the drive circuit.

  Next, in the upper region 141 of the housing 140, the wall surface (the bottom surface 140 a and the side surfaces 140 b and 140 c) of the housing 140 and a plurality of partition walls 144 a, 144 b, 144 c, 144 d, 144 e, 144 f partitioning the inside of the housing 140. The first air path 111 and the second air path 112 are formed by the lid 150. An ion generator 113 is disposed in the second air passage 112. That is, the ion generator 110 includes a first air path 111, a second air path 112, and an ion generator 113.

  As shown in FIG. 7, the first air path 111 refers to a space between the intake port 111 a and the exhaust port 111 b, and penetrates the region on the right side of the upper region 141 in the vertical direction. The air inlet 111a communicates with a central region 142 of the housing 140 (that is, a region where the fan 120 is held). The exhaust port 111 b communicates with the outside of the housing 140.

  As shown in FIG. 7, the second air passage 112 refers to a space between the air inlet 112a and the air outlet 112b, and is formed on the left side of the first air passage 111 (the region on the left side of the upper region 141). Has been. The intake port 111a is provided below the partition wall 144a. The exhaust port 112 b is provided at a position facing the first air path 111. In other words, the second air passage 112 merges with the first air passage 111 at the position of the exhaust port 112b. In addition, the width of the second air passage 112 is narrower than that of the first air passage 111 on the upstream side from the joining point of the first and second air passages 111 and 112.

  In addition, the inlet 112a of the 2nd air path 112 which concerns on this Embodiment is formed as FIG.6 and FIG.8 shows, for example. First, a through-hole 145 that penetrates the bottom surface 140a of the housing 140 in the thickness direction is formed so as to straddle the partition wall 144a at a connection portion between the bottom surface 140a of the housing 140 and the partition wall 144a. Then, as shown in FIG. 6, the opening on the outside of the casing 140 (that is, the back surface of the casing 140) of the through hole 145 is sealed with a seal 146 or the like, whereby the intake air of the second air passage 112 is taken. A mouth 112a is formed.

  In addition, foreign matter (dust, water droplets, etc.) enters the intake port 112a between the outside of the case 140 and the intake port 112a of the second air passage 112 in the upper region 141 of the case 140. A shielding wall 147 is formed. Since the height of the shielding wall 147 is lower than that of the partition wall 144a, the inflow of outside air to the intake port 112a is allowed between the shielding wall 147 and the lid 150 with the lid 150 attached to the housing 140. A slight gap is formed.

  In this way, the intake port 112a is formed using the small through-hole 145 formed below the partition wall 144a, and the shielding wall 147 is provided in the passage of the air flowing into the intake port 112a, so that the intake port 112a is connected to the intake port 112a. Intrusion of foreign matter can be effectively prevented.

  Next, on the back side of the lid 150, as shown in FIG. 7, a nonwoven fabric 151 is placed at a position facing the side surface 140b and the partition walls 144a, 144d, 144e, 144f separating the inside and the outside of the second air passage 112. It is affixed. The non-woven fabric 151 is covered with the upper surface of the partition walls 144a, 144d, 144e, 144f by covering the housing 140 with the lid 150, and the upper surface of the upper region 141 (particularly, the second air passage 112) of the housing 140 is covered. Keep airtight. The nonwoven fabric 151 is an example of a sealing member, and may be another material such as rubber.

  With the above configuration, air does not flow into the second air passage 112 through a portion other than the intake port 112a and the exhaust port 112b, and from the second air passage 112 through a portion other than the intake port 112a and the exhaust port 112b. Air does not flow out. That is, the second air passage 112 is kept airtight at portions other than the intake port 112a and the exhaust port 112b.

  As shown in FIG. 7, the ion generator 113 is held in a region surrounded by the partition walls 144 b and 114 c in the second air passage 112. That is, the ion generator 113 is disposed upstream of the junction point between the first air passage 111 and the second air passage 112 (that is, the exhaust port 112b of the second air passage 112).

  In addition, as shown in FIG. 9, the ion generator 113 includes a pair of electrodes 113a and 113b that are spaced apart from each other, and a Peltier element that generates condensation by cooling the pair of electrodes 113a and 113b. An example of means) 113c, an insulating member 113d disposed between the electrode 113a and the Peltier element 113c, and a voltage generator 113e that applies a high voltage between the pair of electrodes 113a and 113b.

  When the Peltier element 113c is supplied with voltage from the power supply circuit 71 (directly or via the control circuit 130), the upper surface side close to the pair of electrodes 113a and 113b has a low temperature (heat absorption side), and the lower surface side has a high temperature ( Heat dissipation side). The insulating member 113d electrically insulates and thermally connects the electrode 113a and the Peltier element 113c. As a result, condensation occurs on the electrode 113a cooled by the Peltier element 113c. Here, when a high voltage (for example, 3500 V) is applied between the pair of electrodes 113a and 113b by the voltage generation unit 113e, a mist that is covered with particulate water by corona discharge generated between the pair of electrodes 113a and 113b. Negative ions (ion mist having a diameter of 5 to 20 nm) are generated.

  In the above configuration, when the fan 120 (see FIG. 3) is rotated, the air supplied from the vent hole 43 of the back cover 40 flows into the first air passage 111 through the intake port 111a and then flows to the outside through the exhaust port 111b. Exhausted. That is, the air in the first air path 111 is forcibly exhausted from the lower side (the intake port 111a side) to the upper side (the exhaust port 111b side) of the first air path 111. At this time, a negative pressure is generated at the confluence point of the first air path 111 and the second air path 112 (that is, the exhaust port 112b of the second air path 112), and the intake port 112a is formed in the second air path 112. A natural flow of air from the air to the exhaust port 112b occurs.

  That is, air (outside air) containing moisture flowing into the second air passage 112 from the intake port 112a is not ionized but supplied to the ion generator 113 when passing between the partition walls 144b to 144e. Ion mist generated by the generator 113 is collected. The air containing the ion mist is guided in the same direction as the flow of the first air passage 111 by the partition walls 144d and 144f, and is exhausted from the exhaust port 112b to the first air passage 111. As a result, the ion mist generated by the ion generator 113 is discharged from the ion mist discharge unit 100 together with the exhaust from the first air path 111, and is discharged into the viewing space in front of the display panel 20 by the louver 50.

  In addition, in order to discharge ion mist from the ion mist discharge | release unit 100, when the ion generator 113 is directly exposed to the ventilation which generate | occur | produced with the fan 120, the dew condensation produced in a pair of electrodes 113a and 113b can be evaporated. There is sex. Therefore, as described above, negative pressure is generated around the exhaust port 112b by the air generated by the fan 120, and ion mist is included in the natural flow of air generated in the second air passage 112 by this negative pressure. Accordingly, it is possible to effectively suppress evaporation of dew condensation that occurs in the pair of electrodes 113a and 113b.

  Moreover, if the cooling of the surface on the heat dissipation side of the Peltier element 113c is insufficient, the cooling efficiency on the heat absorption side decreases. Therefore, the ion generator 113 exposes the heat radiation side surface of the Peltier element 113 c in the second air passage 112. In the present embodiment, as shown in FIG. 7, the heat dissipation side surface (the surface facing the partition wall 144e) of the Peltier element 113c is exposed in the second air passage 112 from the gap provided in the partition wall 144c. doing. Therefore, the air in the second air passage 112 carries the ion mist generated by the ion generator 113 to the exhaust port 112b and cools the surface on the heat dissipation side of the Peltier element 113c.

  Further, air is supplied to the fan 120 not only from the vent hole 43 of the back cover 40 but also from the through hole 140e provided in the side surface 140d of the housing 140. The side surface 140d is an outer wall that constitutes the lower region 143 of the housing 140, and faces downward when the housing 140 is attached to the back surface of the display panel 20. That is, the air supplied to the fan 120 from the through hole 140 e through the lower region 143 contributes to cooling of the control circuit 130 held in the lower region 143.

  That is, the fan 120 has a function of diffusing the ion mist generated by the ion generator 113 into the viewing space, each component of the ion mist emission unit 100 (particularly, the heat radiation side surface of the Peltier element 113c, and the control circuit 130). ) And cooling function.

  Here, from the viewpoint of increasing the degree of freedom in routing the power cable to the television receiver 10, it is desirable to dispose the power socket 72 at a position near the center in the left-right direction on the back surface of the display panel 20. And in order to implement | achieve this, it is necessary to make the width | variety of the left-right direction of the ion mist discharge | release unit 100 arrange | positioned in the center of the back surface of the display panel 20 small.

  On the other hand, in order to generate a sufficient amount of ion mist, it is necessary to increase the volume of the second air passage 112 (that is, increase the amount of water supplied to the ion generator 113). Therefore, it is difficult to reduce the width in the left-right direction of the upper region 141 of the housing 140 that holds the ion generation unit 110. Further, in order to spread the ion mist generated by the ion generation unit 110 to the entire viewing space in front of the display panel 20, it is necessary to enlarge the fan 120. For this reason, it is difficult to reduce the width in the left-right direction of the central region 142 of the housing 140 that holds the fan 120.

  Therefore, in the present embodiment, as shown in FIGS. 3 and 5, the horizontal width of the lower region 143 of the casing 140 adjacent to the power socket 72 is set to the horizontal direction of the upper region 141 and the central region 142. It is smaller than the width. More specifically, the power socket 72 side (left side) of the lower region 143 that holds the control circuit 130 is cut out so that the power socket 72 can be arranged at the lower center of the back surface of the display panel 20. In this way, by selectively reducing the left and right widths of the housing 140 at a portion that has little influence on the performance of the ion mist emission unit 100, the power cable can be prevented while preventing the performance of the ion mist emission unit 100 from being deteriorated. The degree of freedom of routing can be increased.

  Next, the configuration and function of the louver 50 will be described with reference to FIGS. 10 and 11. FIG. 10 is a perspective view showing the positional relationship between the louver 50 and the light source 60. FIG. 11 is an enlarged front view of a position where the louver 50 and the light source 60 face each other.

  First, the louver 50 has a curved surface shape that bulges outward, and functions as a guide member that guides the ion mist emitted from the ion mist emission unit 100 to the viewing space. Specifically, as shown in FIG. 2, the louver 50 is attached to a position including the central portion of the upper end of the back cover 40, that is, the exhaust port 111 b of the ion mist emission unit 100. Further, as shown in FIG. 1, the louver 50 forms a gap with the upper end of the display panel 20. As a result, the ion mist emitted upward from the ion mist emission unit 100 is changed in the horizontal direction (forward direction of the display panel 20) by the louver 50 and supplied to the viewing space.

  The louver 50 also functions as a notification unit that notifies the user in the viewing space that the ion mist is released from the ion mist release unit 100. Specifically, the louver 50 is formed of, for example, a transparent material (typically a resin material), and includes a first end surface 51 facing the light source 60 and a second end surface 52 facing the viewing space. Have.

  On the other hand, the light source 60 includes a substrate 61 and a plurality of LED (Light Emitting Diode) elements 62 arranged on the surface of the substrate 61 at a predetermined interval. For example, as shown in FIG. 3, the light source 60 is installed outside the lid 150 of the ion generation unit 110 with the LED element 62 facing upward. That is, the light source 60 is disposed at a position that is not visible to the user in the viewing space.

  Then, the control circuit 130 turns on the LED element 62 of the light source 60 while the ion mist emission unit 100 is emitting ion mist. Thereby, the light output from the LED element 62 is incident on the first end face 51 of the louver 50, passes through the inside of the louver 50, and part of the light is emitted from the outer surface of the louver 50 (surface of the curved surface portion). And the other part is emitted from the second end face 52. That is, to the user in the viewing space, the entire surface of the louver 50 (the outer surface of the curved surface of the louver 50) and the second end surface 52 appear to shine.

  Here, the louver 50 is preferably formed of a colorless and transparent resin in order to increase the transmittance of light incident from the first end face 51. On the other hand, the surface of the louver 50 may be painted with an arbitrary color. Thereby, the light emission color of the surface of the louver 50 can be determined by the combination of the color of the surface of the louver 50 and the light emission color of the LED element 62. Similarly, the second end face 52 may be painted with an arbitrary color. On the other hand, in order to increase the amount of light incident from the light source 60, the first end face 51 is preferably not painted (still colorless and transparent).

  The second end face 52 is preferably roughened in order to diffusely reflect light that has passed through the louver 50. On the other hand, it is desirable that the first end face 51 has a smooth surface in order to increase the amount of light incident from the light source 60. That is, it is desirable to make the surface roughness of the second end face 52 rougher than that of the first end face 51.

  Further, the first end surface 51 is preferably composed of a plurality of surfaces facing in directions intersecting each other in order to diffuse light incident from the light source 60 throughout the louver 50. As shown in FIG. 11, the first end surface 51 according to the present embodiment is configured such that a portion that does not face the LED element 62 is a flat surface 51 a parallel to the substrate 61, and a portion that faces the LED element 62 is a concave curved surface. 51b. In other words, the first end surface 51 includes a plurality of (five in the example of FIG. 11) concave curved surfaces 51b and a plane 51a connecting adjacent concave curved surfaces 51b.

  Further, the diameter (width) of the concave curved surface 51 b is desirably set larger than the width of the LED element 62 in order to efficiently take in diffused light output from the LED element 62. That is, the concave curved surface 51b is formed so as to cover the LED elements 62 facing each other. In addition, what is necessary is just to determine the specific diameter of the concave curved surface 51b by the distance with the LED element 62, etc.

  Note that the louver 50 that functions as an indicator is not limited to the use of notifying the release of ion mist from the ion mist release unit 100. For example, the signal processing circuit 75 may notify the user of the reception of the emergency broadcast by turning on the light source 60 when the emergency broadcast is received through the tuner.

  In the above embodiment, the television receiver 10 has been described as an example of an image display device. However, the image display device is not limited to this. In other words, the present invention can be applied to, for example, a personal computer display, a monitor without a tuner, and the like.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  The present invention is advantageously used in an image display device such as a television receiver.

DESCRIPTION OF SYMBOLS 10 Television receiver 20 Display panel 30 Base 40 Back cover 41,42,140e, 145 Through-hole 43 Ventilation hole 44 Projection 45,46 Level difference 50 Louver 51 1st end surface 51a Plane 51b Concave surface 52 2nd end surface 60 Light source 61 Substrate 62 LED element 71 Power supply circuit 72 Power supply socket 75 Signal processing circuit 76 Terminal group 100 Ion mist emission unit 110 Ion generation part 111 First air path 111a, 112a Inlet 111b, 112b Exhaust outlet 112 Second air path 113 Ion generator 113a, 113b Electrode 113c Peltier element 113d Insulating member 113e Voltage generator 120 Fan 130 Control circuit 140 Housing 140a Bottom surface 140b, 140c, 140d Side surface 141 Upper region (first region)
142 Central area (second area)
143 Lower region (third region)
144a, 144b, 144c, 144d, 144e, 144f Partition 146 Seal 147 Shielding wall 150 Lid 151 Non-woven fabric

Claims (6)

A display panel;
A drive circuit disposed on the back surface of the display panel and displaying an image on the display panel;
An ion mist emission unit that is arranged at a position spaced apart from the drive circuit on the back surface of the display panel and emits ion mist;
The ion mist emission unit is
An ion generator for generating ion mist,
A blower that discharges the ion mist generated by the ion generator to a viewing space in front of the display panel;
A control circuit for controlling the operation of the ion mist generator and the blower;
An image display apparatus comprising: a housing that holds the ion generation unit, the blower, and the control circuit, and that thermally isolates the interior from the drive circuit. The drive circuit includes a power supply circuit that supplies power, and a signal processing circuit that processes an image signal to be displayed on the display panel,
The ion mist emission unit is disposed in the center of the back surface of the display panel,
The power supply circuit is arranged on one of the left and right sides of the ion mist emission unit,
The image display device according to claim 1, wherein the signal processing circuit is disposed on the other side of the left and right of the ion mist emission unit. The power supply circuit includes a socket for receiving a plug for supplying an external power supply at an end near the ion mist emission unit,
The housing is partitioned into a first region that holds the ion generator, a second region that holds the blower, and a third region that holds the control circuit,
The image display device according to claim 2, wherein a width of a third area adjacent to the socket of the housing is narrower than that of the first and second areas. The image display device further includes a back cover that covers a back surface of the display panel,
The ion mist emission unit further includes a lid that hermetically seals a portion corresponding to the first region of the opening surface of the housing that faces the back cover,
The back cover includes a convex portion that protrudes so as to surround the housing at a position corresponding to the second and third regions, and that thermally isolates the second and third regions from the drive circuit. The image display device described in 1. The housing has an opening in the outer wall at a position corresponding to the third region,
The image display device according to claim 3, wherein the blower exhausts air supplied from the opening through the third region to the second region to the first region. The image display device according to claim 1, wherein the image display device is a television receiver having a tuner that receives broadcast waves.

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