JP2014091489A - Display device for seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device for a seat which effectively cools a display.SOLUTION: The display device for a seat includes a display 110 attached to a rear surface part 12 or 13 of a seat 10 for a vehicle. A frame 14 forming frameworks of the rear surface parts 12, 13 is provided in the rear surface parts 12, 13. The display 110 is thermally connected with the frame 14.

Description

  The present invention relates to a display mounted on the back side of a vehicle seat, for example.

  As a conventional sheet display (television unit), for example, one disclosed in Patent Document 1 is known. In Patent Document 1, a frame along the outer periphery of the seat back is provided on the seat back of the seat, and plywood is attached to the front and back surfaces of the frame. Further, the back side plywood is provided with an opening partly formed by notching, and a cushion material is provided on each surface of the back side and front side plywood excluding the opening region. And the display is attached to the opening part of the back side plywood. Furthermore, air holes are provided in the upper part and the lower part of the side surface of the display so as to communicate the interior and the exterior of the seat back.

  As a result, the air warmed by the heat generated by the operation of the display escapes from the upper air hole to the outside, and outside air is introduced from the lower air hole so that the display is cooled. It has become.

Japanese Utility Model Publication No. 1-58341

  However, in Patent Document 1, since the display is cooled by natural convection of air flowing through the air holes, a large cooling effect cannot be expected.

  In view of the above problems, an object of the present invention is to provide a sheet display device that enables effective display cooling.

  In order to achieve the above object, the present invention employs the following technical means.

  According to the present invention, there is provided a seat display device including a display (110) mounted on a back surface portion (12, 13) of a vehicle seat (10), and the back surface portion (12, 13) includes the back surface. A frame (14) forming a skeleton of the parts (12, 13) is provided, and the display (110) is thermally connected to the frame (14).

  According to the present invention, since the display (110) is thermally connected to the frame (14), the frame (14) can be a heat dissipation member for heat dissipation of the display (110), and the heat dissipation area Therefore, the display (110) can be effectively cooled.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment description mentioned later.

It is a figure which shows the display apparatus for sheets in 1st Embodiment, (a) is sectional drawing which shows a sheet | seat, (b) is the arrow line view seen from the Ib direction of (a). It is sectional drawing which shows the display apparatus for sheets in a headrest. (A) is a perspective view which shows the display with which a headrest is mounted | worn, (b) is a figure which shows the temperature distribution accompanying the heat_generation | fever of a display. It is a figure which shows the display apparatus for sheets in 2nd Embodiment, (a) is sectional drawing which shows a sheet | seat, (b) is the arrow line view seen from the IV-b direction of (a). It is a figure which shows the display apparatus for sheets in 3rd Embodiment, (a) is sectional drawing which shows a sheet | seat, (b) is the arrow line view seen from the Vb direction of (a). It is a figure which shows the display apparatus for sheets in 4th Embodiment, (a) is sectional drawing which shows a sheet | seat, (b) is the arrow line view seen from the VI-b direction of (a).

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration. Not only combinations of parts that clearly indicate that the combination is possible in each embodiment, but also a combination of the embodiments even if they are not clearly specified unless there is a problem with the combination. It is also possible.

(First embodiment)
A sheet display device 100 according to a first embodiment will be described with reference to FIGS. A seat display device (hereinafter referred to as a display device) 100 is formed by providing a display 110 on the back surface of a seat 10 for passenger seating arranged in the front-rear direction in vehicles such as automobiles, trains, airplanes, and passenger ships. ing. The seat 10 of the present embodiment is, for example, a seat 10 on the driver's seat or passenger's side for an automobile, and a passenger on the rear seat side can view images (TV broadcast, DVD playback images, etc.) on the display 110. It can be done.

  As shown in FIG. 1, the seat 10 includes a seat cushion 11 constituting a seat portion, a seat back 12 constituting a back portion, and a headrest 13. The seat cushion 11, the seat back 12, and the headrest 13 are mainly formed of a cushion material such as urethane foam, and a skin is provided on the surface of these cushion materials. On the surface of the headrest 13 opposite to the occupant (back of the head), an accommodating portion 13a for mounting a display 110 described later is formed. The accommodating portion 13 a is provided with an opening equivalent to the front shape of the display 110 and is a recessed portion that is recessed toward the inside of the headrest 13.

  A seat frame 14 that forms a skeleton of the seat 10 is provided inside the seat 10 (the seat cushion 11, the seat back 12, and the headrest 13). The seat frame 14 corresponds to the frame of the present invention, and is formed by combining a metal (iron, aluminum, etc.) pipe material as a main body and other band plate materials, bar materials, and the like. A branch frame 14a branching from the seat frame 14 is provided at the front end portion of the seat frame 14 on the headrest 13 side (FIG. 2), and the branch frame 14a is formed so as to be disposed in the accommodating portion 13a. ing. In the seat 10, in order to improve the comfort for the occupant, the thickness of the cushion material is set so that the occupant side of the seat frame 14 is thicker than the non-occupant side of the seat frame 14. Yes.

  As shown in FIG. 2, the display device 100 is provided so as to be inserted into the accommodating portion 13 a of the headrest 13, and includes a display 110 and a heat conductive sheet 120. Note that the display device 100 is not limited to the headrest 13 and may be mounted on the back surface of the seat back 12 (the surface on the side facing the occupant of the rear seat). Furthermore, you may make it mount | wear with both the headrest 13 and the seat back 12 as needed.

  The display 110 is, for example, a liquid crystal display device, and is formed by providing a liquid crystal unit 112, a backlight 113, a controller 114, and the like in a case 111.

  The case 111 has a bottom portion 111a and has a flat box shape with an opening on the side facing the bottom portion 111a. The case 111 is disposed such that the bottom 111a is the back side of the accommodating portion 13a and the opening faces the outside of the headrest 13. The liquid crystal part 112 is disposed so as to close the opening of the case 111. The liquid crystal portion 112 has a liquid crystal composition sealed between two glass plates. When a voltage is applied to the liquid crystal composition, the orientation of the liquid crystal molecules changes, and the light transmittance from the backlight 113 changes. Is increased or decreased to form a desired image. The backlight 113 is disposed on the upper side of the liquid crystal unit 112 (side surface side of the case 111) in FIG. 2, and the light emitted from the backlight 113 proceeds in the direction in which the surface of the liquid crystal unit 112 expands, and is illustrated in the figure. The light is reflected by the diffusion plate not to be directed so as to be directed in a direction orthogonal to the surface of the liquid crystal unit 112. The controller 114 is disposed between the bottom 111a of the case 111 and the liquid crystal unit 112, and controls the brightness of the backlight 113.

  During the operation of the display 110 formed in this manner, a large amount of heat is generated particularly from the backlight 113 and the controller 114, and the backlight 113 and the controller 114 are the main heat source of the display 110. . Therefore, the bottom portion 111a is formed with protruding portions 111b and 111c that protrude to come into contact with the backlight 113 and the controller 114 side while maintaining the same thickness as the bottom portion 111a. A plurality of plate-like radiating fins (not shown) are formed in the recessed area on the outer side of the case 111 where the protruding portions 111b and 111c are formed. That is, in the display 110, the projections 111b and 111c and the heat radiation fins form a heat radiation part (heat sink) for the backlight 113 and the controller 114.

  The heat conductive sheet 120 is a heat transfer sheet member that efficiently transfers heat generated from the display 110 (the backlight 113, the controller 114, and the like) to the outside. For example, silicon rubber, acrylic material, graphite, and the like. Formed from. The heat conductive sheet 120 is joined to the outer surface of the bottom 111a. Furthermore, the heat conductive sheet 120 is connected so as to contact the outer surface of the branch frame 14a. That is, heat from the heat transfer sheet 120 side is efficiently transmitted to the branch frame 14a, and the display 110 is generally thermally connected to the seat frame 14 as a whole.

  In the display device 100 formed as described above, heat is generated mainly from the backlight 113 and the controller 114 during the operation of the display 110. Here, in the case of the conventional display device, as shown in FIG. 3B, the generated heat is trapped in the headrest 13 around the heat generation source, and various devices constituting the display 110 because the temperature rises. There is a risk that the functional degradation of the product may further decrease, and the durability may decrease.

  However, in the display device 100 according to the present embodiment, the display 110 is thermally connected to the seat frame 14 provided as the basic structure of the seat 10, so that the heat generated from the display 110 is transferred to the protrusions. It can be transmitted to the seat frame 14 via 111b, 111c, the radiation fin, the heat conductive sheet 120, and the branch frame 14a. The surface area of the seat frame 14 is much larger than the surface area of the heat radiating fins formed on the display 110. By using the seat frame 14 as a heat radiating member for heat dissipation of the display 110, the display 110 can be effectively used. It becomes possible to cool.

  Since the cushion material in the seat 10 is set so that the occupant side is thicker than the non-occupant side with respect to the seat frame 14, the heat transmitted to the seat frame 14 is the cushion material. Due to the thermal resistance, the air is mainly discharged from the seat frame 14 toward the non-occupant side, and the passenger sitting on the seat 10 does not feel uncomfortable. Further, since the heat capacity of the seat frame 14 is much larger than the heat capacity of the display 110, the temperature rise due to the heat released from the seat frame 14 can be suppressed to a very small level, and the passengers on the rear seat side are uncomfortable. Never give.

(Second Embodiment)
A display device 100A of the second embodiment is shown in FIG. In the display device 100A of the second embodiment, the display 110 is mounted on a seat 10A including the seat air conditioner 15 with respect to the display device 100 of the first embodiment.

  The display 110 is mounted on the upper rear side of the seat back 12. A branch frame 14b that branches from the seat frame 14 is provided at an intermediate portion of the seat frame 14 in the seat back 12, and the display 110 is thermally connected to the branch frame 14b through a heat conductive sheet 120. ing.

The seat air conditioner 15 is, for example, a cooling unit that provides a cooling function to an occupant seated by supplying cold air to the seat 10A, and includes a blower 15a, a ventilation passage 15b, a blowout passage 15c, and the like. The blower 15a includes, for example, a flat centrifugal fan, and supplies cool air generated by a vehicle air conditioner (not shown) or a heat transfer conversion element (such as a Peltier module) into the ventilation path 15b. The ventilation path 15 b is a passage formed in the seat cushion 11 and the seat back 12, and is formed along the respective surfaces of the seat cushion 11 and the seat back 12. And the site | part close to the air blower 15a of the ventilation path 15b is connected with the blower outlet of the air blower 15a. The blowout path 15c is a passage that branches off from the ventilation path 15b and opens to the surface on the passenger side of the seat cushion 11 and the seat back 12, and is distributed on the surfaces of the seat cushion 11 and the seat back 12. Many are provided. In the seat air conditioner 15 thus formed, the cool air is supplied to the occupant by the blower 15a via the ventilation path 15b and the blowout path 15c.

  In the present embodiment, a frame ventilation path 15d branched from the ventilation path 15b and extending toward the seat frame 14 is provided, and a part of the cool air supplied to the ventilation path 15b by the blower 15a is provided on the seat frame 14. It is supplied to the outer surface. The cool air flowing through the frame ventilation passage 15d is supplied to the seat frame 14 and then discharged, for example, below the seat 10.

  When the seat air conditioner 15 is used, the temperature in the passenger compartment is usually high. Under such conditions, the temperature during the operation of the display 110 naturally increases. In the present embodiment, the seat frame 14 can be actively cooled by the cool air supplied from the frame ventilation passage 15d, and the temperature of the seat frame 14 can be lowered. The display 110 can be cooled.

  A temperature detection unit that generates a temperature signal corresponding to the temperature of the display 110 and a control unit that controls on / off of the seat air conditioner 15 based on the temperature signal obtained by the temperature detection unit are provided. Regardless of whether seat air conditioning is required, the display 110 may be cooled by supplying cool air to the seat frame 14 based on the temperature signal of the display 110.

(Third embodiment)
A display device 100B of the third embodiment is shown in FIG. In the display device 100B of the third embodiment, the display 110 is mounted on a seat 10B including a seat air-conditioning device 15A with respect to the display device 100A of the second embodiment.

  Similar to the second embodiment, the display 110 is mounted above the rear side of the seat back 12 and is thermally connected to the branch frame 14b via the heat conductive sheet 120.

  The seat air conditioner 15A is a cooling means in which the frame air passage 15d is eliminated from the seat air conditioner 15 of the second embodiment, and a connection air passage 15e is provided instead. The connection ventilation path 15 e is a path that branches from the ventilation path 15 and connects to the inside of the pipe material of the seat frame 14. A part of the cold air supplied from the blower 15a to the ventilation passage 15b is supplied into the pipe material of the seat frame 14 by the connection ventilation passage 15e. In addition, after the cold wind which distribute | circulates the inside of the seat frame 14 is supplied in the seat frame 14, it is discharged | emitted below the sheet | seat 10, for example.

  As a result, the seat frame 14 can be directly cooled by the cool air, and the temperature of the seat frame 14 can be lowered. Therefore, the display 110 can be cooled more effectively than in the first and second embodiments. It becomes.

  Note that, similarly to the second embodiment, a temperature detection unit that generates a temperature signal corresponding to the temperature of the display 110, and on / off of the seat air conditioner 15A is controlled based on the temperature signal obtained by the temperature detection unit. A control unit may be provided to cool the display 110 by supplying cool air into the seat frame 14 based on the temperature signal of the display 110 regardless of whether or not the original seat air conditioning is required.

(Fourth embodiment)
A display device 100C of the fourth embodiment is shown in FIG. In the display device 100C of the fourth embodiment, the display 110 is mounted on a seat 10C including the seat air-conditioning device 15B with respect to the display device 100 of the first embodiment.

  The display 110 is mounted on the upper rear side of the seat back 12. A branch frame 14b that branches from the seat frame 14 is provided at an intermediate portion of the seat frame 14 in the seat back 12, and the display 110 is thermally connected to the branch frame 14b through a heat conductive sheet 120. ing.

  Further, the display 110 is provided with a temperature sensor 130 that generates a temperature signal corresponding to the temperature of the display 110, for example, the temperature of the backlight 113. The temperature signal obtained by the temperature sensor 130 is output to the control unit 15h described later.

  The seat air conditioner 15B is, for example, a heating means that exhibits a heating function for a passenger seated by heating the seat 10C, and includes a vehicle interior temperature sensor 15f, a heater 15g, a control unit 15h, and the like. The vehicle interior temperature sensor 15f generates a vehicle interior temperature signal corresponding to the temperature in the vehicle interior, and the vehicle interior temperature signal obtained by the vehicle interior temperature sensor 15f is output to the control unit 15h described later. The heater 15g is, for example, an electric heater, is provided in the seat cushion 11 and the seat back 12, and is disposed close to the seat frame 14. The control unit 15h is a control unit that controls the on / off operation of the heater 15g.

  In the present embodiment, the controller 15h activates the heater 15g when the in-vehicle temperature signal obtained by the in-vehicle temperature sensor 15f is lower than a predetermined heater required temperature, and further, the side of the in-vehicle temperature signal higher than the required heater temperature. When the upper limit temperature set in the above is exceeded, the heater 15g is stopped. As a result, the passenger sitting on the seat 10 is heated between the required heater temperature and the upper limit temperature.

  Further, the control unit 15h controls the operation of the heater 15g based on the temperature signal obtained by the temperature sensor 130 in addition to the control of the heater 15g by the vehicle temperature signal obtained by the vehicle interior temperature sensor 15f. It has become. That is, when the temperature signal from the temperature sensor 130 is equal to or lower than a predetermined first predetermined temperature, when the heater 15g is operated and exceeds a second predetermined temperature set higher than the first predetermined temperature. The heater 15g is stopped. The first predetermined temperature is determined based on a temperature at which the interior of the vehicle is under a low temperature condition and the fluidity of the liquid crystal composition of the liquid crystal unit 112 is reduced. The second predetermined temperature is It is determined based on the temperature at which the fluidity of the liquid crystal composition can be obtained without hindrance. The first predetermined temperature corresponds to the predetermined temperature of the present invention.

  When the display 110 is a liquid crystal display 110, the fluidity of the liquid crystal composition incorporated in the liquid crystal part 112 is lowered under a low temperature environment, and the response of the screen is lowered. In this embodiment, between the first predetermined temperature and the second predetermined temperature, the heat of the seat air conditioner 15B (heater 15g) is transmitted to the seat frame 14 and further transmitted to the display 110, so that the display 110 is positively activated. Can be heated. Accordingly, the fluidity of the liquid crystal can be increased in a low temperature environment, and the responsiveness of the screen can be improved.

  In a low temperature environment where the fluidity of the liquid crystal composition is lowered, usually, there is a demand for heating for passengers. Therefore, the control for heating the display 110 as described above is combined with the operation of the original seat heating. You may make it do. In this case, the temperature sensor 130 may be abolished and the operation control of the heater 15g may be performed based on the in-vehicle temperature signal obtained by the in-vehicle temperature sensor 15f.

  Further, although the heater 15g of the seat air conditioner 15B is used as the heating means, instead of this, for example, by utilizing the warm air generated by the vehicle air conditioner or the heat transfer conversion element, the low temperature environment The display 110 may be heated by transmitting heat to the seat frame 14 below.

(Other embodiments)
In each of the above embodiments, the heat conductive sheet 120 is interposed between the seat frame 14 and the display 110. However, if the heat conductivity between the seat frame 14 and the display 110 is good, the heat conductive sheet is used. 120 may be abolished.

  In the first to third embodiments, the display 110 has been described as a liquid crystal display. However, the display 110 is not limited to this, and other displays such as a CRT display, a plasma display, and an organic EL display may be used.

  In each of the above embodiments, the seat 10 for mounting the display devices 100, 100A, 100B, and 100C has been described as a car seat. However, as described at the beginning, other vehicles such as trains, airplanes, and passenger ships are used. It can be widely applied to the sheet for use.

10 seat 12 seat back (back)
13 Headrest (back)
14 Seat frame (frame)
15, 15A Seat air conditioner (cooling means)
15B Seat air conditioner (heating means)
100 sheet display device 110 display

Claims (4)

A seat display device comprising a display (110) mounted on a back surface (12, 13) of a vehicle seat (10),
A frame (14) forming a skeleton of the back surface portion (12, 13) is provided in the back surface portion (12, 13).
The display device for seats, wherein the display (110) is thermally connected to the frame (14). Cooling means (15) for cooling that supplies cold air to the sheet (10) is provided,
The sheet display device according to claim 1, wherein cold air from the cooling means (15) can be supplied to the frame (14). The frame (14) is formed of a pipe material,
Cooling means (15A) for cooling that supplies cold air to the sheet (10) is provided,
The sheet display device according to claim 1, wherein cold air from the cooling means (15A) can be supplied into the pipe member. The display (110) is a liquid crystal display (110),
A heating means (15 g) for heating the sheet (10) is provided;
When the temperature of the display (110) is equal to or lower than a predetermined temperature, heat from the heating means (15g) can be transferred to the display (110) through the frame (14). The sheet display device according to any one of claims 1 to 3.

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