JP2012123162A - Image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the easily visible state of an image regarding an image display device for displaying an image.SOLUTION: An image display device for displaying an image includes a body 11B in which a visible window 111B for visibility of a displayed image is formed, a window member 12B which is positioned on the outermost surface of the visible window 111B and forms the outer shape of the image display device 10B together with the body 11B, a fan 13B, and a duct 18B which converts air sent from the fan 13B into airstream flowing along the outer face of the window member 12B.

Description

  The present case relates to an image display device that displays an image.

  An image display device for displaying an image is mounted on or attached to a wide range of devices such as a personal computer and a television receiver.

  In the image display device, dust easily adheres to the outer surface of the window member positioned on the outermost surface of the viewing window for visually recognizing an image. If dust adheres, the image may be difficult to see. Here, the window member located on the outermost surface means, for example, when the display screen is exposed on the outer surface, when the protective glass or the like is fitted to the display screen or the viewing window, the protective glass or the like. .

  2. Description of the Related Art Conventionally, a structure has been proposed in which a filter is provided at an air intake port for sending air into a housing so that dust does not easily enter the housing.

  In addition, conventionally, it has been proposed to close the periphery of the gap with a dustproof filter so that the dust does not enter the gap between the plasma display panel display surface and the optical filter disposed on the front surface thereof.

  Further, conventionally, outside air taken in from an intake port provided on one end side is exhausted from the other end side, the direction is changed by a U-turn duct, air is again sent into the apparatus, and then exhausted from the exhaust port to the outside through the exhaust duct. An air channel structure has been proposed.

  However, all of these proposals are measures against dust inside the apparatus, and no consideration is given to dust adhering to the outer surface of the apparatus.

JP 2007-271841 A JP 2006-330196 A JP 2003-228260 A

  An object of the image display device disclosed herein is to keep an image in an easily visible state.

  The image display device of the present disclosure includes a housing, a window member, a fan, and a duct.

  The case is a case in which a viewing window for receiving the displayed image is formed.

  Further, the window member is a member that is positioned on the outermost surface of the viewing window and divides the outer shape of the image display device together with the housing.

  Moreover, a duct is a duct which converts the ventilation from a fan into the airflow which flows along a window member outer surface.

  According to the image display device of the present disclosure, an air flow along the outer surface of the window member is formed, dust adhesion to the outer surface of the window member is suppressed, and removal of the adhered dust is promoted, and image display with good visibility is performed. The device is realized.

It is a front view of the image display apparatus of a comparative example. It is a rear view of the image display apparatus of a comparative example. It is the figure which showed the inside from the back side of the image display apparatus of a comparative example. It is a front view of the image display apparatus of a 1st embodiment. It is the figure which showed the arrangement | positioning state of the main components when the image display apparatus of 1st Embodiment is seen through from the side seeing. It is the figure which removed the back panel and the duct of the image display apparatus of 1st Embodiment, and showed the inside from the back side. It is a figure which shows the outline | summary of the hardware constitutions as a computer of the image display apparatus of 1st Embodiment. It is a schematic diagram of the duct employ | adopted with the image display apparatus of 1st Embodiment. It is a flowchart which shows the dust removal process of the display screen front surface implemented with the image display apparatus of 1st Embodiment. It is a front view of the image display apparatus of 2nd Embodiment. It is the figure which showed the arrangement | positioning state of the main components when the image display apparatus of 2nd Embodiment is seen through from the side seeing inside. It is the figure which removed the back panel and the duct of the image display apparatus of 2nd Embodiment, and showed the inside from the back side. It is a flowchart which shows the dust removal process of the display screen front surface implemented with the image display apparatus of 2nd Embodiment. It is a front view of the image display apparatus of 3rd Embodiment. It is the figure which showed the arrangement | positioning state of the main components when the image display apparatus of 3rd Embodiment is seen through from the upper side. It is the figure which removed the back panel and the duct of the image display apparatus of 3rd Embodiment, and showed the inside from the back side. It is a flowchart which shows the dust removal process of the display screen front surface implemented with the image display apparatus of 3rd Embodiment.

  Prior to the description of the embodiments, a comparative example will be described first, and then several embodiments will be described.

  FIG. 1 to FIG. 3 are views showing the inside of the image display device of the comparative example from the back side by removing the front view, the back view, and the back panel that covers the back side, respectively.

  The image display device 10A includes a housing 11A having a viewing window 111A and a display screen 12A exposed to the outside from the viewing window 111A. Further, the housing 11A has an intake port 112A at the lower back and an exhaust port 113A at the upper back. In addition, as shown in FIG. 3, the image display device 10A has various electronic components mounted in the housing 11A and on the back side of the display screen 12A. The image display apparatus 10A has a function as a computer that executes various arithmetic processes using these electronic components.

  Among these electronic components, there are heat generating electronic components that generate heat by operation, and this image display device 10A is provided on the back side of the display screen 12A for cooling the heat generating electronic components and cooling the entire inside of the housing. Fans 13A and 14A are also mounted. When these fans 13A and 14A are operated, air is sucked into the housing 11A from the air inlet 112A shown in FIG. 2, and the air heated by the heat generated by the electronic components inside the housing 11A is discharged from the air outlet 113A to the outside. Exhausted. The image display device 10A is supported by the support member 15A in a state where the display screen 12A is erected and the entire housing 11A is slightly lifted.

  In the image display device 10A of this comparative example, the display screen 12A is directly exposed to the outside, but no measures are taken against the adhesion and removal of dust on the surface of the display screen 12A.

  FIG. 4 is a front view of the image display apparatus according to the first embodiment. FIG. 5 is a diagram showing an arrangement state of main components when the image display apparatus according to the first embodiment, which is the same as FIG. FIG. 6 is a diagram showing the inside from the back side of the image display apparatus according to the first embodiment with the back panel and duct removed.

  These image display devices 10B shown in FIGS. 4 to 6 are similar to the image display device 10A of the comparative example shown in FIGS. 1 to 3 in a casing 11B in which a viewing window 111B for receiving the displayed images is formed. Have The image display device 10B has a display screen 12B located on the outermost surface of the viewing window 111B. That is, the display screen 12B forms the outer shape of the image display device 10B together with the housing 11B. The image display device 10B is supported by the support member 15B in a state where the display screen 12B is erected and the entire housing 11B is slightly lifted. Further, the image display device 10B includes cameras 15B at the left and right corners of the upper side of the display screen 12B. These cameras 15B are for using the display screen 12B as a touch panel. That is, the camera 15B is used as a camera for analyzing a photographed image and detecting a touch location when the display screen 12B is touched with a finger or the like.

  In the present embodiment, these cameras 15B are also used as sensors for detecting the amount of dust attached to the outer surface of the display screen 12B.

  Similar to the image display device 10A of the comparative example shown in FIGS. 1 to 3, this image display device 10B has various electronic components mounted on the back side of the display screen 12B, and has a function as a computer.

  Here, the description of the structure of the image display device 10B according to the first embodiment shown in FIGS. 4 to 6 is temporarily suspended, and the hardware configuration of the image display device 10B according to the first embodiment as a computer will be described. .

  FIG. 7 is a diagram illustrating an outline of a hardware configuration as a computer of the image display apparatus according to the first embodiment.

  Here, a CPU (Central Processing Unit) 911, a memory 912, an HDD (Hard Disc Drive) 913, and a display 914 are shown. Further, FIG. 7 further shows a position detection & dust detection circuit 915, a TV image reception circuit 916, a speaker 917, a device interface 918, and a communication interface 919 to which the camera 15B is connected. These elements 911 to 919 are connected to each other via a bus 910.

  The CPU 911 is a central processing unit that executes a program.

  The memory 912 is a memory in which a program is expanded for execution by the CPU 911. The memory 912 is also used as a work area for programs executed by the CPU 911.

  The HDD 913 is a nonvolatile mass storage device that stores various programs and data.

  The display 914 is a device that has a display screen 12B shown in FIGS. 4 and 5 in structure and displays an image according to an instruction from the CPU 911 on the display screen 12B.

  The position detection & dust detection circuit 915 is a circuit responsible for detecting the touch position on the display screen 12B and detecting the amount of dust adhering to the display screen 12B based on the image taken by the camera 15B.

  The TV receiver circuit 916 is a circuit that generates a TV image for display on the display 914 and a TV sound signal output from the speaker 917 based on a signal obtained by receiving radio waves with an antenna (not shown).

  The device interface 918 communicates with devices such as a keyboard and a mouse (not shown) and plays a role of transmitting received signals from these devices to the CPU 911.

  The communication interface 919 is connected to a communication network such as the Internet, and is responsible for transmission / reception of signals via the connected communication network.

  The description of the structure of the image display device 10B according to the first embodiment will be continued with reference to FIGS. 4 to 6 again.

  This image display device 10B is equipped with various electronic components for realizing the function as a computer shown in FIG. 7. Among these electronic components, a heat generating electronic component that generates heat during operation, such as a CPU 911, etc. 16B (see FIG. 5) exists. For this reason, the fan 13B for air-cooling the heat generating electronic component 16B is also mounted on the image display device 10B of the first embodiment. Further, as shown in FIG. 5, an intake port 112B is provided at the upper back of the housing 11B. As shown in FIG. 5, a heat radiating member 17B is applied to the heat generating electronic component 16B, and the heat transmitted from the heat generating electronic component 16B to the heat radiating member 17B is transferred to the air blown by the fan 13B.

  The heat generating electronic component 16B has a variable operation speed, and the amount of heat generated varies depending on the operation speed. Corresponding to this, the fan 13B can freely change the air flow rate. This fan can further increase the air flow rate to an air flow rate that exceeds the air flow rate necessary for cooling the heat generating electronic component 16B. The fan 13B blows air that exceeds the amount of air necessary for cooling the heat generating electronic component 16B, and is used to remove dust on the front surface of the display screen 12B, as will be described later.

  When the fan 13B is operated, air outside the image display device 10B is sucked from the air inlet 112B and flows in the direction of the arrow X1 shown in FIG. 5, and is blown in the direction of the arrow X2 by the fan 13B. Heat is transferred to the air blown through the member 17B.

  The air that has received the heat of the heat-generating electronic component 16B in this way is guided to the front surface of the display screen 12B by a duct 18B described below, and along the front surface of the display screen 12B from below the display screen 12B, FIG. , Converted into an air flow rising in the direction of arrow X3 shown in FIG. Dust that is likely to adhere to the front surface of the display screen 12B and once attached dust are removed by this air flow.

  FIG. 8 is a schematic diagram of a duct employed in the image display device according to the first embodiment shown in FIGS. 4 to 7.

  The duct 18B gradually increases in width from the air inlet 181B toward the air outlet 182B, and at the air outlet 182B, the duct 18B extends to the same width as the entire left and right width of the display screen 12B.

  A plurality of guide plates 183B are erected on the side of the air inlet 181B of the duct 18B in order to spread the incoming air to the left and right and to reinforce the duct 18B. The air flows out from side to side and flows out from the air outlet 182B with a uniform outflow amount across the entire left and right. The air outlet 182B is also provided with a plurality of reinforcing ribs 184B.

  As shown in FIG. 5, in this duct 18B, air sent from a fan 13B mounted on the back side of the display screen 12B in the housing 11B flows into the duct 18B from the air inlet 181B. The inflowing air is arranged so as to bypass the lower edge 121B of the display screen 12B and flow out along the front surface of the display screen 12B.

  FIG. 9 is a flowchart showing dust removal processing on the front surface of the display screen, which is performed in the image display apparatus according to the first embodiment shown in FIGS. This flowchart corresponds to an example of processing as the first fan control unit in this case.

  When the image display device 10B shown in FIGS. 4 to 8 is powered on, a preparation process for operating each part of the image display device 10B is performed and the process shown in FIG. 8 is started.

  Here, first, a sensor value representing the amount of dust attached to the front surface of the display screen 12B when the camera 15B (see FIG. 4) is used as a sensor for detecting the amount of dust attached is acquired (step S11). When the dust adhesion amount indicated by the sensor value exceeds the threshold value (step S12), the air blowing amount of the fan 13B is increased to the air blowing amount exceeding the maximum air blowing amount necessary for cooling the heat generating electronic component 16B (step S13). Thereby, dust adhering to the front surface of the display screen 12B is removed. When the dust adhesion amount indicated by the sensor value acquired in step S11 is equal to or less than the threshold value (step S12), the process proceeds to step S14, and the blowing amount of the fan 13B does not exceed the maximum blowing amount necessary for cooling the heat generating electronic component 16B. To be limited. In this case, the fan 13 </ b> B rotates at a speed that secures an air blowing amount according to the heat generation amount of the heat generating electronic component 16 </ b> B, with the limited air blowing amount as an upper limit. Even when the air flow rate is limited in this way, the fan 13B continues to rotate, and thus the adhesion of dust to the display screen 12B can be suppressed.

  In the image display device 10B according to the first embodiment shown in FIGS. 4 to 8, the sensor values shown in FIG. 8 are acquired (step S11) periodically (for example, every minute), and the process shown in FIG. 9 is executed. Is done.

  FIG. 10 is a front view of the image display apparatus according to the second embodiment. FIG. 11 is a diagram showing an arrangement state of main components when the image display device according to the second embodiment, which is the same as FIG. Further, FIG. 12 is a view showing the inside from the back side of the image display apparatus according to the second embodiment shown in FIGS. 10 and 11, with the back panel and duct removed.

  Here, the components corresponding to the respective components of the image display device 10B of the first embodiment shown in FIGS. 4 to 8 are replaced with “C” instead of “B” of the reference numerals attached in FIGS. The same reference numerals are used except for the reference numerals, and only the differences will be described. The hardware configuration as a computer of the image display apparatus 10C of the second embodiment is the same as that shown in FIG. 7, and illustration and description thereof are omitted.

  The housing 11C of the image display device 10C according to the second embodiment is provided with an intake port 112C at the lower back and an exhaust port 113C at the upper rear.

  The fan 13C is mounted in a posture to send air upward, and when the fan 13C is operated, air outside the image display device 10C is sucked from the intake port 112C and rises in the direction of the arrow Y1 shown in FIG. It is sent further upward (in the direction of arrow Y2) by the fan 13C and warmed by the heat of the heat generating electronic component 16C. The warmed air passes through the duct 18C disposed at the upper part, bypasses the upper edge 122C of the display screen 12C, and extends along the front surface of the display screen 12C from above the display screen 12C (shown in FIGS. 10 and 11). Flows in the direction of arrow Y3). The duct 18C is disposed upside down from the duct 18B of the image display device 10B (FIGS. 4 to 7) of the first embodiment, but the structure itself is the duct of the image display device 10B of the first embodiment. It is the same as 18B. As shown in the image display device 10 </ b> C of the second embodiment shown in FIGS. 10 to 12, the air flow may be blown down along the front surface of the display screen 12 </ b> C.

  As shown in FIG. 12, the image display apparatus 10C of the second embodiment is also provided with another fan 14C. The fan 14C serves to cool a heat generating electronic component (not shown) in the vicinity of the fan 14C by exhausting air sucked from the lower intake port 112C shown in FIG. 11 from the upper exhaust port 113C. I'm in charge.

  FIG. 13 is a flowchart showing dust removal processing on the front surface of the display screen, which is performed in the image display apparatus according to the second embodiment shown in FIGS. 10 to 12. This flowchart corresponds to another example of the process as the first fan control unit in the present case.

  When the image display apparatus 10C shown in FIGS. 10 to 12 is powered on, a preparation process for operating each part of the image display apparatus 10C is performed and the process shown in FIG. 13 is started.

  Prior to the start of the process shown in FIG. 13, the fan 13C is limited so that the amount of air blown becomes the upper limit of the maximum amount of air necessary for cooling the heat generating electronic component 16C, and the heat generation of the heat generating electronic component 16C. It is assumed that the fan is rotating at a speed that secures an air blowing amount according to the amount.

  Here, as in the case of FIG. 9, first, a sensor value representing the amount of dust adhesion on the front surface of the display screen 12C when the camera 15C (see FIG. 10) is used as a dust adhesion amount detection sensor is acquired ( Step S21). If the dust adhesion amount indicated by the sensor value does not exceed the threshold value, the process returns to step S21, and the sensor value is periodically acquired (for example, every minute).

  If it is determined in step S22 that the dust adhesion amount exceeds the threshold value, the process proceeds to step S23, and the air flow rate of the fan 13C is increased to the air flow rate exceeding the maximum air flow rate necessary for cooling the heat generating electronic component 16C. (Step S23). Thereby, the dust adhering to the front surface of the display screen 12C is removed.

  When the sending amount of the fan 13C is increased in step S23, the timer starts counting (step S24). When a certain time (for example, 3 minutes) elapses (step S25), the blowing amount of the fan 13C is changed to that of the heat generating electronic component 16C. The air flow is limited so as not to exceed the maximum air flow necessary for cooling (step S26).

  Dust strongly adhering to the display screen 12C may not be removed even if the blowing is continued for a long time. Therefore, as shown in FIG. 13, the time until the blowing amount is limited by counting with a timer after the blowing amount is increased. You may decide.

  FIG. 14 is a front view of the image display apparatus according to the third embodiment. FIG. 15 is a diagram showing an arrangement state of main components when the image display apparatus according to the third embodiment, which is the same as FIG. 14, is seen through from above. Further, FIG. 16 is a view showing the inside from the back side of the image display apparatus according to the third embodiment shown in FIGS. 14 and 15, with the back panel and duct removed.

  Here, the component corresponding to each component of the image display device 10B of the first embodiment shown in FIGS. 4 to 8 is replaced with “D” instead of “B” of the reference numerals attached in FIGS. Only the differences will be described. The hardware configuration of the image display device 10D of the third embodiment as a computer is the same as that shown in FIG. 7 except that the camera 15B and the position detection & dust detection unit 915 are deleted. The description is omitted.

  The housing 11D of the image display device 10D of the third embodiment is provided with an air inlet 112D on the back surface.

  The fan 13D is mounted in a posture to send out air toward the side, and the air drawn in from the intake port 112D and proceeding in the direction of the arrow Z1 shown in FIG. 15 is sent out to the side by the fan 13D and is generated by the heat generating electronic component 16D. It is warmed by heat and further proceeds in the direction of the arrow Z2, passes through the duct 18D arranged on the side, bypasses the side edge 123D of the display screen 12D, and extends from the side of the display screen 12D along the front of the display screen 12D along the arrow Z3. It flows out in the direction (see FIGS. 14 and 15). The basic structure of the duct 18D is the same as that of the ducts 18B and 18C of the image display devices 10B and 10C (FIGS. 4 to 8 and FIGS. 10 to 12) of the first and second embodiments. The dimensions correspond to the length of the side edge 123D of the screen 12D. As shown in the image display device 10D of the third embodiment shown in FIGS. 14 to 16, a horizontal airflow may be formed along the front surface of the display screen 12D.

  The image display device 10D of the third embodiment shown in FIGS. 14 to 16 is different from the image display devices 10B and 10C of the first embodiment and the second embodiment in the direction of the air flow on the front surface of the display screen 12D. In addition, a camera corresponding to the camera 15B shown in FIG. 4 or the camera 15C shown in FIG. 10 is not provided.

  Therefore, in the image display device 10 of the third embodiment, dust on the front surface of the display screen 12D is removed by the following processing.

  FIG. 17 is a flowchart showing dust removal processing on the front surface of the display screen, which is performed in the image display device according to the third embodiment shown in FIGS. 14 to 16. The first timer in the process shown in FIG. 17 corresponds to an example of a timer referred to in this case, and the process shown in FIG. 16 corresponds to an example of a process in the second fan control unit referred to in this case.

  When the image display device 10D shown in FIGS. 14 to 16 is turned on, preparation processing for operating each part of the image display device 10D is performed and the processing shown in FIG. 17 is started.

  Prior to the start of the processing shown in FIG. 17, the fan 13D is restricted so that its air flow rate does not exceed the maximum air flow rate necessary for cooling the heat generating electronic component 16D, and the heat generation amount of the heat generating electronic component 16D. It is assumed that the fan is rotating at a speed at which a blown air amount corresponding to is secured.

  Here, first, counting by a first timer (for example, a timer that counts 57 minutes) is started (step S31), and when the first timer expires (step S32), the amount of air blown by the fan 13D is changed to that of the heat generating electronic component 16D. The air flow is increased to an air flow exceeding the maximum air flow required for cooling (step S33). Next, timing by a second timer (for example, a timer that counts for 3 minutes) is started (step S34), and when the second timer expires (step S33), the air flow rate of the fan 13D is used to cool the heat generating electronic component 16D. The fan 13D is limited so as to be equal to or less than the required maximum air blowing amount (step S36), and the rotation speed of the fan 13D is controlled so that the air blowing amount corresponds to the heat generation amount of the heat generating electronic component 16D.

  When the air flow rate of the fan 13D is limited in step S36, the process returns to step S31, and time measurement by the first timer is started again.

  According to the processing shown in FIG. 16, the air flow rate of the fan 13D every fixed time (for example, every hour) for a fixed time (for example, 3 minutes) regardless of whether dust adheres to the front surface of the display screen 12D. Rises and is removed when dust adheres to the surface of the display screen 12D.

  In addition, even if the apparatus includes the cameras 15B and 15C, such as the image display apparatuses 10B and 10C of the second embodiment, the cameras 15B and 15C are not used as dust detection sensors. As shown, the air flow rate of the fan may be raised or lowered by a timer.

  In addition, in any of the first to third embodiments described above, the fan for cooling the heat generating electronic components is also used for removing dust on the front surface of the display screen. May be provided. When the dedicated fan is provided, the air flow rate of the fan may be increased or decreased as in FIGS. 9, 13, and 17, or the operation of the fan may be turned on / off.

10A, 10B, 10C, 10D Image display device 11A, 11B, 11C, 11D Housing 12A, 12B, 12C, 12D Display screen 13A, 13B, 13C, 13D, 14A, 14C Fan 15A, 15B, 15C, 15D Support member 15B , 15C Camera 16B, 16C, 16D Heat-generating electronic components 17B, 17C, 17D Heat radiation member 18B, 18C, 18D Duct 111A, 111B, 111C, 111D Viewing window 112A, 112B, 112C, 112D Air intake port 113A, 113C Air exhaust port 181B Air flow Inlet 182B Air outlet 183B Guide plate 184B Rib

Claims (5)

In an image display device that displays an image,
A housing in which a viewing window for receiving the displayed image is formed;
A window member that is located on the outermost surface of the viewing window and forms the outer shape of the image display device together with the housing;
With fans,
An image display device comprising: a duct for converting the air blown from the fan into an air flow flowing along the outer surface of the window member.   2. The image display device according to claim 1, wherein the image display device includes a heat generating electronic component, and the fan is a fan for cooling the heat generating electronic component. The fan is mounted on the back side of the window member in the housing,
The image display device according to claim 1, wherein the duct is configured to allow the air blown from the fan to flow along an outer surface of the window member by bypassing an edge of the window member. The fan is a fan whose operation can be turned on and off or the amount of air flow can be freely changed.
A sensor for detecting dust in front of the window member;
4. The apparatus according to claim 1, further comprising: a first fan control unit that activates the fan or increases an air flow rate of the fan in response to detection of dust exceeding a threshold value by the sensor. The image display apparatus of any one of them. The fan is a fan whose operation can be turned on and off or the amount of air flow can be freely changed.
A timer that measures time repeatedly,
4. The apparatus according to claim 1, further comprising a second fan control unit that activates the fan or increases the air flow rate of the fan in response to the timer being timed up. 2. An image display device according to item 1.

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