KR102292051B1 - Display device - Google Patents

Abstract

In the present specification, disclosed are a display device and a method for detecting replacement timing of a filter mounted on the display device. According to the present specification, a display device including a display module comprises: a timer for counting the local time of an area where the display device is installed; a housing including the display module therein and including an opening for inflow and outflow of air; a filter mounted on the opening; a fan that circulates the outside air and the inside air of the housing through the filter; a first sensor for sensing the internal temperature of the housing; a second sensor for sensing the external temperature of the housing; a control unit that generates a notification message for inspecting or replacing the filter on the basis of the local time and the temperature transmitted from the first sensor and the second sensor; and an alarm unit that receives the notification message from the control unit and outputs a warning.

Description

display device {DISPLAY DEVICE}

This specification relates to a display device.

As the information society develops, the demand for display devices is also increasing in various forms. Display) and various display devices have been researched and used.

Among them, the liquid crystal panel of the LCD includes a liquid crystal layer, a TFT substrate and a color filter substrate facing each other with the liquid crystal layer interposed therebetween, and can display an image using light provided from a backlight unit.

Recently, demand for a display device for displaying outdoor advertisements using a liquid crystal panel of an LCD using a backlight unit as described above is increasing. However, when installed outdoors, general display devices are provided with a filter to prevent dust from entering the interior, and when the life of the provided filter is over, it is difficult to detect it.

In particular, micropore filters such as HEPA filters continue to grow even though the micro-organisms are removed from the filter surface and are not discharged together with the purified air, causing odors when used for a long time. There was a problem that worked.

In general, in the case of filters, a replacement cycle is set for the filters collectively, and the filter is replaced when the replacement period has elapsed. However, in the case of a display device installed outdoors, it may be clogged sooner than a predetermined replacement time or may not need to be replaced even when a predetermined replacement time is reached, depending on the surrounding environment or standby state.

In particular, in the case of an outdoor display device, a person must visit and inspect whether the filter of the product is clogged, and this inspection may waste time and money. Therefore, in the case of an outdoor display device, a means capable of sensing remotely is required.

An object of the present specification is to determine the replacement timing of a filter installed in a display device using a temperature sensor or the like.

An object of the present specification is to determine the external environment of a display device using a temperature sensor or the like.

In addition, an object of the present specification is to detect a filter replacement time by sensing a current attached to a fan in addition to a temperature sensor, and to understand an external environment of a display device.

As such, an object of the present specification is to provide a display device and a detection method that can determine when to replace a filter only with a simple and inexpensive sensor such as a temperature sensor and a current sensor.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are clear to those of ordinary skill in the art to which the present invention belongs from the detailed description of the invention below. will be able to be understood

In order to solve the above problems, in the present specification, in a display device including a display module, a timer for counting the local time of a region where the display device is installed, the display module is included therein, and an opening for air inflow and outflow A housing comprising: a filter mounted to the opening; Based on the two sensors, the temperature and the local time transmitted from the first sensor and the second sensor, the control unit may include a control unit for generating a notification message for the inspection or replacement of the filter.

In addition, according to the local time, when the internal temperature is greater than the reference temperature, the controller acquires a difference value between the current rotation speed of the fan and the rotation speed input to the fan, and based on the difference value, the fan state can be detected.

In addition, the display device may further include a third sensor configured to sense an internal temperature of the housing, wherein the controller includes the first sensor and the third sensor when the internal temperature is greater than a reference temperature according to the local time. may obtain a difference value between the sensed values of , and detect the state of the first sensor based on the difference value.

In addition, when the state of the fan and the first sensor is detected as a normal state, the controller may acquire a difference value between the internal temperature and the external temperature.

Also, when the difference value is greater than the target temperature, the controller may generate a notification message for checking or replacing the filter.

In addition, the target temperature means a difference value between the maximum internal temperature of the product and the maximum external temperature of the product, and the maximum internal temperature of the product is the lowest temperature among guaranteed temperatures at which each of the internal components of the display device can operate. means, and the maximum external temperature of the product may mean a maximum temperature of an external environment in which the display device may operate.

In addition, the reference temperature may mean a threshold temperature at which the display device can operate when sunlight is directly incident on the screen of the display device.

In addition, the fan may include a motor for generating power for circulating the bet and the outside air, and a current sensor for detecting a current flowing through the motor.

In addition, the controller may receive a sensed value for detecting the amount of current flowing through the motor from the current sensor, and detect the state of the fan based on the sensed value.

Also, the local time may be a time from sunrise to before sunset.

Also, the fan may include a first fan positioned above the display device and a second fan positioned below the display device.

In addition, the housing includes a front surface and a rear surface, and the housing is located on the rear surface, a first opening located around the first fan, and a second opening located at the rear surface, but located around the second fan may include.

In addition, the filter may include a first filter mounted on the first opening and a second filter mounted on the second opening.

Also, the first filter may be a mesh filter, and the second filter may be a HEPA filter.

In addition, the control unit may further include an alarm unit for outputting a warning by receiving the notification message from the control unit.

In order to solve the above problems, the present specification provides a method for detecting replacement timing of a filter mounted on a display device, the method comprising: detecting an internal temperature and an external temperature of the display device; Counting time, acquiring the replacement time of the filter based on the internal temperature, the external temperature and the local time, generating a notification message based on the replacement time of the filter, and the notification message Accordingly, the method may include outputting a warning message for checking or replacing the filter.

In addition, the step of obtaining the replacement time of the filter includes the steps of detecting whether the local time is daytime, obtaining a difference value between the internal temperature and the external temperature, and the difference value is higher than the target temperature If it is large, it may include the step of detecting the filter as a clogged state.

In addition, the step of obtaining the replacement time of the filter may include detecting whether the local time is night time, and when the external temperature is higher than a preset temperature, for checking the external environment of the display device It may include generating a notification message, obtaining a difference value between the internal temperature and the external temperature, and detecting the filter as a clogged state when the difference value is greater than a target temperature.

In addition, the target temperature means a difference value between the maximum internal temperature of the product and the maximum external temperature of the product, and the maximum internal temperature of the product is the lowest temperature among guaranteed temperatures at which each of the internal components of the display device can operate. means, and the maximum external temperature of the product may mean a maximum temperature of an external environment in which the display device may operate.

In addition, according to the local time, when the internal temperature is greater than the reference temperature, a difference value between the current rotation speed of the fan and the rotation speed input to the fan is obtained, and the state of the fan based on the difference value Further comprising the step of detecting, the step of obtaining the replacement timing of the filter, when the fan is detected in a normal state, based on the internal temperature, the external temperature and the local time, the replacement timing of the filter can be obtained.

In the present specification, there is an effect of determining the replacement time of the filter installed in the display device using a temperature sensor or the like.

The present specification has an effect of grasping the external environment of the display device using a temperature sensor or the like.

In addition, the present specification has the effect of detecting the replacement time of the filter by sensing the current attached to the fan in addition to the temperature sensor, and understanding the external environment of the display device.

As such, the present specification has an effect of providing a display device and a detection method capable of identifying the replacement time of a filter only with a simple and inexpensive sensor such as a temperature sensor and a current sensor.

The effects obtainable in the present specification are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which this specification belongs from the description below. .

1 to 9 are diagrams illustrating a configuration of a display device according to the present specification.
10 to 12 are diagrams illustrating a display device including a plurality of sensors according to the first embodiment of the present specification.
13 is a diagram illustrating a display device further including a communication device or a learning device according to the first embodiment of the present specification.
14 to 16 are views illustrating cross-sections of a display device in which a plurality of fans are positioned around both ends of the display device according to the first embodiment of the present specification.
17 is a diagram specifically illustrating a second fan according to the first embodiment of the present specification.
18 to 21 are diagrams illustrating a method of detecting a replacement time of a filter mounted on a display apparatus using a plurality of sensors according to a second embodiment of the present specification.
BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included as a part of the detailed description to help the understanding of the present specification, provide embodiments of the present specification, and together with the detailed description, explain the technical features of the present specification.

Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numerals regardless of reference numerals, and overlapping descriptions thereof will be omitted.

The suffixes "module" and "part" for the components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have a meaning or role distinct from each other by themselves. In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical idea disclosed herein is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

Hereinafter, the display panel will be described with a liquid crystal display device (LCD) as an example, but the display panel applicable to the present invention is not limited to the liquid crystal panel, and plasma display panel (Plasma Display Panel, PDP), Field Emission Display (FED), and Organic Light Emitting Diode (OLED) are also possible.

Referring to FIG. 1 , a display device 10 (hereinafter used interchangeably with “display device”) has a first long side (LS1) and a second long side opposite to the first long side (LS1). Side, LS2), a first short side (SS1) adjacent to the first long side (LS1) and the second long side (LS2), and a second short side (SS2) opposite to the first short side (SS1) ) may be included.

Here, the first short side area SS1 is referred to as a first side area, the second short side area SS2 is referred to as a second side area opposite to the first side area, and the second short side area is referred to as a second side area. The first long side area LS1 is referred to as a third side area adjacent to the first side area and the second side area and located between the first side area and the second side area, and the second long side area ( It is possible to call LS2 a fourth side area adjacent to the first side area and the second side area, located between the first side area and the second side area, and opposite to the third side area. .

In addition, for convenience of explanation, the lengths of the first and second long sides LS1 and LS2 are illustrated and described as being longer than the lengths of the first and second short sides SS1 and SS2, but the first and second long sides LS1 and LS2 A case in which the length of LS2 is approximately equal to the length of the first and second short sides SS1 and SS2 may also be possible.

In addition, in the following, the first direction (First Direction, DR1) is a direction parallel to the long side (Long Side, LS1, LS2) of the display device 10, and the second direction (Second Direction, DR2) of the display device 10 It may be a direction parallel to the short side (Short Side, SS1, SS2).

The third direction DR3 may be a direction perpendicular to the first direction DR1 and/or the second direction DR2 .

The first direction DR1 and the second direction DR2 may be collectively referred to as a horizontal direction. In addition, the third direction DR3 may be referred to as a vertical direction.

From another point of view, the side on which the display device 10 displays an image may be referred to as a front side or a front side. When the display device 10 displays an image, the side from which the image cannot be observed may be referred to as a rear or rear surface. When the display device 10 is viewed from the front or the front, the side of the first long side LS1 may be referred to as a right side or a right side. Similarly, the side of the second long side LS2 may be referred to as a left side or a seating surface. Similarly, the side of the first short side SS1 may be referred to as an upper side or an upper surface, and the side of the second short side SS2 may be referred to as a lower side or a lower surface.

In addition, the first long side LS1 , the second long side LS2 , the first short side SS1 , and the second short side SS2 may be referred to as edges of the display device 10 . Also, a point where the first long side LS1 , the second long side LS2 , the first short side SS1 , and the second short side SS2 meet each other may be referred to as a corner. For example, the point where the first long side LS1 and the first short side SS1 meet is the first corner C1, and the point where the first long side LS1 and the second short side SS2 meet is the second corner C2 ), the point where the second short side SS2 and the second long side LS2 meet is the third corner C3, and the point where the second long side LS2 and the first short side SS1 meet is the fourth corner C4 can be

Here, a direction from the first short side SS1 to the second short side SS1 or a direction from the second short side SS2 to the first short side SS1 may be referred to as a vertical direction UD. A direction from the first long side LS1 to the second long side LS2 or a direction from the second long side LS2 to the first long side LS1 may be referred to as a left-right direction LR.

The display device 10 may be installed indoors or outdoors. The display device 10 may be heated from an external heat source such as sunlight. When the temperature of the display device 10 rises above a certain temperature, the performance of the display module 100 may be deteriorated. Accordingly, an appropriate heat dissipation structure is required to maintain the performance of the display device 10 .

Referring to FIG. 2 , the display device 10 may include a housing 113 and a lower support 111 . An opening 113B into which the filter 108B can be inserted may be included in the rear surface of the housing 113 . The display device 10 may include a filter 108B inserted into the opening 113B and a cover portion 107B that covers the opening 113B. In addition, the housing 113 may include a through-hole 113H through which air can flow in and out. In addition, the cover portion 107B may include a through portion (107BH) for air inlet and outlet.

Also, referring to FIG. 2 , a filter 108B capable of filtering dust in the air may be mounted or inserted into the opening 113B. The filter 108B may have a size and shape that meets the standard of the opening 113B. In this case, the filter 108B may be a HEPA (High Efficiency Particulate Air) filter.

HEPA filters are widely used in systems for purifying air as well as air purifiers, and are used for the purpose of removing microorganisms including fine dust suspended in the air. The HEPA filter consists of three stages, and structurally, most fine dust, bacteria, and mold are filtered out by the HEPA filter. As such, when the filter 108B is positioned under the display device 10 , the display device 10 may allow external air to be introduced into the inside through the filter 108B positioned under the display device 10 . have.

Referring to FIG. 3 , the display device 10 includes a housing 113 and a lower support 111 , and openings 113A and 113B through which filters 108A and 108B can be inserted into the rear surface of the housing 113 . A plurality of may be included. The first opening 113A may be positioned at the upper portion of the rear surface of the housing 113 , and the second opening 113B may be positioned at the lower portion of the rear surface of the housing 113 .

Referring to FIG. 3 , the display device 10 includes a first cover part 107A that covers the first opening 113A, and includes a second cover part 107B that covers the second opening 113B. can do. In addition, the first cover portion 107A may include a first through-portion 107AH for air inflow and out, and the second cover portion 107B may include a second through-portion 107BH for air inflow and out.

Referring to FIG. 3 , the first filter 108A may be mounted or inserted into the first opening 113A, and the second filter 108B may be mounted or inserted into the second opening 113B. In this case, the first filter 108A and/or the second filter 108B may be a HEPA filter. In addition, the display device 10 may allow external air to be introduced into the interior through either the first filter 108A or the second filter 108B. In this case, the filter of the opening through which the external air of the display device 10 flows may be a HEPA filter, and the filter of the opening through which the air inside the display device 10 flows out may use a mesh filter instead of the HEPA filter. can The mesh filter may be formed of a metal material and may filter relatively large dust or the like.

The housing 113 described in FIGS. 2 and 3 may include a front cover 105 and a module cover 130 to be described later, and may mean a configuration that protects the components of the display device 10 from the outside.

4 and 5 , the display module 100 may include a front cover 105 , a display panel 110 , a backlight unit 120 , and a module cover 130 .

The front cover 105 may cover at least some of the front and side surfaces of the display panel 110 . The front cover 105 may have a rectangular frame shape with an empty center. Since the center of the front cover 105 is empty, the image of the display panel 110 can be displayed to the outside.

The front cover 105 may be divided into a front cover and a side cover. That is, it means that it can be divided into a front cover located on the front side of the display panel 110 and a side cover located on the side side of the display panel 110 . The front cover and the side cover may be configured separately. Either one of the front cover and the side cover may be omitted. For example, for the purpose of a beautiful design, etc., it means that it may be possible that the front cover does not exist and only the side cover exists.

The display module 100 may include a display panel 110 . The display panel 110 is provided on the front of the display module 100 and an image can be displayed. The display panel 110 may divide the image into a plurality of pixels and output the image by matching color, brightness, and saturation for each pixel. The display panel 110 may be divided into an active area in which an image is displayed and an inactive area in which an image is not displayed. The display panel 110 may include a front substrate and a rear substrate facing each other with a liquid crystal layer interposed therebetween.

The front substrate may include a plurality of pixels including red (R), green (G), and blue (B) sub-pixels. The front substrate may generate an image corresponding to a color of red, green, or blue according to a control signal.

The rear substrate may include switching elements. The rear substrate may switch the pixel electrode. For example, the pixel electrode may change the molecular arrangement of the liquid crystal layer according to an externally applied control signal. The liquid crystal layer may include a plurality of liquid crystal molecules. The liquid crystal molecules may change their arrangement according to a voltage difference generated between the pixel electrode and the common electrode. The liquid crystal layer may transmit light provided from the backlight unit 120 to the front substrate.

The backlight unit 120 may be located on the rear side of the display panel 110 . The backlight unit 120 may include a plurality of light sources. The light source of the backlight unit 120 may be directly disposed.

The backlight unit 120 may be coupled to the front side of the frame. For example, it means that a plurality of light sources may be disposed on the front side of the frame, and in this case, it may be collectively referred to as a direct type backlight unit.

The backlight unit 120 may be driven by a full driving method or a partial driving method such as local dimming or impulsive driving. The backlight unit 120 may include an optical sheet 125 and an optical layer 123 .

The optical sheet 125 may allow the light of the light source to be uniformly transmitted to the display panel 110 . The optical sheet 125 may be composed of a plurality of layers. For example, it may include at least one prism sheet and/or at least one diffusion sheet.

At least one coupling portion 125d may be present in the optical sheet 125 . The coupling part 125d may be coupled to the front cover and/or the module cover. That is, it means that it can be directly coupled to the front cover and/or the module cover. Alternatively, the coupling part 125d may be coupled to a structure coupled to the front cover and/or the module cover. That is, it means that it can be indirectly coupled to the front cover and/or the module cover.

The optical layer 123 may include a light source or the like. A specific configuration of the optical layer 123 will be described in the corresponding part.

The module cover 130 may serve to support the components of the display device 10 . For example, a configuration such as the backlight unit 120 may be coupled to the frame. The frame may be made of a metal material such as an aluminum alloy.

Alternatively, the module cover 130 may be located on the rear surface of the display device 10 . The module cover 130 may protect the internal configuration from the outside. At least a portion of the module cover 130 may be coupled to the front cover 105 . The module cover 130 may be an injection molding made of a resin material.

As shown in FIG. 5 , the optical sheet 125 and/or the diffusion plate 129 may be positioned on the frame. The optical sheet 125 and/or the diffuser plate 129 may engage the frame at the edge of the frame. The optical sheet 125 and/or the diffuser plate 129 may be directly seated on the edge of the frame. That is, it means that the outer periphery of the optical sheet 125 and/or the diffusion plate 129 may be supported by the frame.

The display panel 110 may be positioned on the front side of the optical sheet 125 . An edge area of the front surface of the display panel 110 may be covered by the front cover.

The backlight unit 120 includes an optical layer 123 including a substrate 122 , at least one light assembly 124 , a reflective sheet 126 , and a diffusion plate 129 , and a front side of the optical layer 123 . It may include an optical sheet 125 positioned.

The substrate 122 may be configured in the form of a plurality of straps extending in a first direction and spaced apart from each other by a predetermined distance in a second direction orthogonal to the first direction.

At least one optical assembly 124 may be mounted on the substrate 122 . An electrode pattern for connecting the adapter and the optical assembly 124 may be formed on the substrate 122 . For example, a carbon nanotube electrode pattern for connecting the optical assembly 124 and the adapter may be formed on the substrate 122 .

The substrate 122 may be formed of at least one of polyethylene terephthalate (PET), glass, polycarbonate (PC), and silicon. The substrate 122 may be a printed circuit board (PCB) on which at least one optical assembly 124 is mounted.

The optical assembly 124 may be disposed on the substrate 122 at a predetermined interval in the first direction. A diameter of the optical assembly 124 may be greater than a width of the substrate 122 . That is, it may be greater than the length of the substrate 122 in the second direction.

The light assembly 124 may be a light emitting diode (LED) chip or a light emitting diode package including at least one light emitting diode chip.

The light assembly 124 may include a colored LED or a white LED that emits at least one color among colors such as red, blue, and green. The colored LED may include at least one of a red LED, a blue LED, and a green LED.

A light source included in the light assembly 124 may be a chip on board (COB) type. The COB type may be a form in which an LED chip, which is a light source, is directly coupled to a substrate 122 . Therefore, the process can be simplified. In addition, it is possible to lower the resistance, thereby reducing the energy lost as heat. That is, it means that the power efficiency of the optical assembly 124 can be increased. The COB type can provide brighter lighting. The COB type may be implemented thinner and lighter than the conventional one.

A reflective sheet 126 may be positioned on the front side of the substrate 122 . The reflective sheet 126 may be positioned on an area of the substrate 122 excluding the area where the light assembly 124 is formed. That is, it means that a plurality of through holes 132 may be formed in the reflective sheet 126 .

The reflective sheet 126 may reflect the light emitted from the light assembly 124 toward the front side. In addition, the reflective sheet 126 may reflect the light reflected from the diffusion plate 129 again.

The reflective sheet 126 may include at least one of metal and metal oxide, which are reflective materials. For example, the reflective sheet 126 includes a metal having a high reflectance such as at least one of aluminum (Al), silver (Ag), gold (Au), and titanium dioxide (TiO 2 ) and/or a metal oxide. can do.

The reflective sheet 126 may be formed by depositing and/or coating a metal or a metal oxide on the substrate 122 . The reflective sheet 126 may be printed with ink including a metal material. The reflective sheet 126 may be formed with a deposition layer using a vacuum deposition method such as a thermal evaporation method, an evaporation method, or a sputtering method. A coating layer and/or a printing layer using a printing method, a gravure coating method, or a silk screen method may be formed on the reflective sheet 126 .

An air gap may be positioned between the reflective sheet 126 and the diffusion plate 129 . The air gap may serve as a buffer through which light emitted from the light assembly 124 may be widely spread. In order to maintain the air gap, a supporter 131 may be positioned between the reflective sheet 126 and the diffusion plate 129 .

A resin may be deposited on the light assembly 124 and/or the reflective sheet 126 . The resin may serve to diffuse light emitted from the light assembly 124 . The diffusion plate 129 may diffuse light emitted from the light assembly 124 upward.

The optical sheet 125 may be positioned on the front side of the diffusion plate 129 . The rear surface of the optical sheet 125 may be in close contact with the diffusion plate 129 , and the front surface of the optical sheet 125 may be in close contact with the rear surface of the display panel 110 .

The optical sheet 125 may include at least one sheet. Specifically, the optical sheet 125 may include one or more prism sheets and/or one or more diffusion sheets. The plurality of sheets included in the optical sheet 125 may be in a state of being adhered and/or in close contact with each other.

The optical sheet 125 may be composed of a plurality of sheets having different functions. For example, the optical sheet 125 may include first to third optical sheets 125a to 125c. The first optical sheet 125a may function as a diffusion sheet, and the second and third optical sheets 125b and 125c may function as a prism sheet. The number and/or position of the diffusion sheet and the prism sheet may be changed. For example, it means that it may include a first optical sheet 125a as a diffusion sheet and a second optical sheet 125b as a prism sheet.

The diffusion sheet may prevent light emitted from the diffusion plate 129 from being partially concentrated, thereby making light distribution more uniform. The prism sheet may collect light emitted from the diffusion sheet so that the light is vertically incident on the display panel 110 .

The coupling portion 125d may be formed on at least one of the corners of the optical sheet 125 . The coupling part 125d may be formed on at least one of the first to third optical sheets 125a to 125c.

The coupling portion 125d may be formed at a corner of the long side of the optical sheet 125 . The coupling portion 125d formed on the first long side and the coupling portion 125d formed on the second long side may be asymmetric. For example, it means that the position and/or the number of the coupling part 125d on the first long side and the coupling part 125d on the second long side may be different from each other.

Referring to FIG. 6 , the light source of the backlight unit 120 ′ may be arranged in an edge shape. The backlight unit 120' includes an optical layer 123' including a substrate 122', at least one light assembly 124', a reflective sheet 126', and a light guide plate 128', and an optical layer 123. ') may include an optical sheet 125' located on the front side.

The substrate 122 ′ may be positioned on at least one side of another configuration of the optical layer 123 ′. The substrate 122 ′ may extend in the width direction of other components of the optical layer 123 ′.

The light assembly 124 ′ may be disposed on the substrate 122 ′ with a predetermined interval therebetween. A longitudinal width of the light assembly 124 ′ may be smaller than a thickness direction width of the light guide plate 128 ′. Accordingly, most of the light emitted from the light assembly 124 ′ may be transmitted into the light guide plate 128 ′.

The light guide plate 128 ′ may be positioned in front of the light assembly 124 ′. The light guide plate 128 ′ may serve to widely spread the light incident from the light assembly 124 ′. Although not shown, the light guide plate 128 ′ may have a stepped shape on a surface adjacent to the light assembly 124 ′. The lower surface of the light guide plate 128 ′ is inclined upward to reflect light incident from the light assembly 124 ′ forward.

The reflective sheet 126 ′ may be positioned behind the light guide plate 128 ′. The reflective sheet 126 ′ may reflect light emitted from the light assembly 124 ′ forward. The reflective sheet 126 ′ may reflect the light reflected from the light guide plate 128 ′ back to the front.

A diffusion plate (not shown) may be further included on the entire surface of the light guide plate 128 ′. A diffusion plate (not shown) may diffuse light emitted from the light guide plate 128 ′ forward.

An air gap may be positioned between the light guide plate 128 ′ and the optical sheet 125 ′. The air gap may serve as a buffer through which light emitted from the light assembly 124 ′ may be widely spread. Meanwhile, a resin may be deposited on the light assembly 124 ′ and/or the reflective sheet 126 ′. The resin may serve to diffuse light emitted from the light assembly 124 ′.

The optical sheet 125 ′ may be positioned in front of the light guide plate 128 ′. The rear surface of the optical sheet 125 ′ may be in close contact with the light guide plate 128 ′, and the front surface of the optical sheet 125 ′ may be in close contact with the rear surface of the display panel 110 of FIG. 5 .

The diffusion sheet may prevent the light emitted from the light guide plate 128 ′ from being partially concentrated, thereby making the luminance of the light more uniform. The prism sheet may condense light emitted from the diffusion sheet so that the light is vertically incident on the display panel 110 of FIG. 5 .

The coupling part 125d' may be formed on at least one of the corners of the optical sheet 125'. The coupling part 125d' may be formed on at least one of the first to third optical sheets 125a' to 125c'.

The coupling portion 125d' may be formed at a corner of the long side of the optical sheet 125'. The coupling part 125d' formed on the first long side and the coupling part 125d' formed on the second long side may be asymmetric. For example, it means that the positions and/or the number of the coupling parts 125d' on the first long side and the coupling parts 125d' on the second long side may be different from each other.

7 and 8 , the sealing frame 140 may be coupled to the rear surface of the display module 100 .

The display module 100 may be a heat source that generates heat. For example, since the display module 100 includes a light source therein, it may be a heat source.

Alternatively, the display module 100 may absorb heat provided from the outside of the display device 10 . For example, the display module 100 may be a heat absorber that absorbs solar heat from the sun.

When the temperature of the display module 100 increases to a temperature above a certain level, the display function of the display module 100 may be deteriorated. Accordingly, it is necessary to properly dissipate heat of the display module 100 in order to maintain the performance of the display device 10 .

The display device 10 may introduce external air into the interior of the display device 10 . The outside air introduced into the display device 10 may exchange heat with a heat source inside the display device 10 . The outside air may exchange heat with the rear surface of the display module 100 . The outdoor air introduced into the display device 10 may be discharged to the outside of the display device 10 after heat exchange.

The sealing frame 140 may have a rectangular shape. The sealing frame 140 may be formed of a plurality of frames. For example, the rectangular sealing frame 140 may be formed of four frames constituting each side.

The sealing frame 140 may include a fastening surface that is fastened to the rear surface of the display module 100 and a side surface bent backward of the display module 100 from the fastening surface. The side surface may extend along the fastening surface and may form a quadrangle. The fastening surface and the rear surface of the display module 100 may be fastened with a fastening member, and the fastening member may be located outside the rectangle formed by the side surface.

The sealing frame 140 may divide the rear surface of the display module 100 into an area S1 inside the sealing frame 140 and an area S2 outside the sealing frame 140 . The area S1 inside the sealing frame 140 may be an area surrounded by the sealing frame 140 among the rear surfaces of the display module 100 . The area S2 outside the sealing frame 140 may be an area of the rear surface of the display module 100 excluding the area inside the sealing frame 140 . The area S1 inside the sealing frame 140 may be a partial area of the rear surface of the display module 100 .

The outside air introduced into the display device 10 may exchange heat with the area S1 inside the sealing frame 140 among the rear surfaces of the display module 100 . That is, the area S1 inside the sealing frame 140 among the rear surfaces of the display module 100 may be in contact with the outside air. On the other hand, the area S2 outside the sealing frame 140 among the rear surfaces of the display module 100 may be blocked from contact with the outside air. The sealing frame 140 may prevent outside air from flowing to the area S2 outside the sealing frame 140 among the rear surfaces of the display module 100 . The area S2 outside the sealing frame 140 among the rear surfaces of the display module 100 may be referred to as a heat exchange area.

A plurality of fastening members may be disposed on the rear surface of the display module 100 . The fastening member may be formed of a bolt and a nut. In this case, a portion of the nut and bolt may be exposed to the rear of the display module 100 .

When a part of the nut and bolt is exposed to the outside of the display module 100 , a gap may occur between the nut and the bolt. In addition, the inside and the outside of the display module 100 may pass through the gap between the nut and the bolt.

Also, when the nut and bolt are exposed to the outside of the display module 100 , a gap may be generated between the nut and the rear surface of the display module 100 . In addition, the inside and the outside of the display module 100 may pass through the gap between the nut and the display module 100 .

The outdoor air introduced into the display device 10 may include foreign substances such as moisture and dust. When the nut and bolt are exposed to the rear of the display module 100 , foreign substances may penetrate into the display module 100 through a gap between the nut and the bolt or a gap between the nut and the rear surface of the display module 100 .

In order to prevent foreign substances from penetrating into the display module 100 , a pam nut 133 may be applied instead of a general nut. The pam nut 133 may have a closed end. When the pam nut 133 is fastened to the bolt, it may cover one end of the bolt. Accordingly, the gap between the nut and the bolt may not be exposed to the outside.

Also, the display module 100 may include a sealing member 134 . The sealing member 134 may be disposed between the nut and the rear surface of the display module 100 . The sealing member 134 may be disposed along the circumference of the nut. The sealing member 134 may prevent foreign substances from penetrating into the display module 100 through the gap between the nut and the display module 100 .

The gasket 150 may be disposed on the rear surface of the display module 100 . And the gasket 150 may be coupled to the sealing frame 140 . The gasket 150 may have a rectangular shape. The gasket 150 may be made of a material having elasticity.

The gasket 150 may divide the rear surface of the display module 100 together with the sealing frame 140 into an area S1 inside the sealing frame 140 and an area S2 outside the sealing frame 140 . The gasket 150 may prevent external air flowing into the display device 10 from flowing into the area S2 outside the frame among the rear surfaces of the display module 100 . The gasket 150 and the sealing frame 140 may form a double waterproof and dustproof structure.

Referring to FIG. 9 , the display module 100 may be coupled to the bracket 160 . The bracket 160 may be formed as a pair. The pair of brackets 160 may be respectively coupled to one side and the other side in the longitudinal direction of the display module 100 .

The display module 100 may be combined with peripheral components such as the sealing frame 140 , the gasket 150 , or the bracket 160 . When the display module 100 is combined with a peripheral configuration, it may be referred to as a module assembly. Alternatively, the display module 100 may be referred to as a module assembly.

display device

Hereinafter, the display device according to the first preferred embodiment of the present specification will be described in detail based on the above contents.

The display apparatus according to the first exemplary embodiment of the present specification may include a timer for counting the local time. In the present specification, local time may mean a time at a location where the display device is installed. In addition, local time in the present specification may include not only time of hours, minutes, and seconds, but also concepts of year, month, and day. A timer in the present specification may be a concept including a device for counting local time or a device including software for counting local time.

In addition, the display device according to the first preferred embodiment of the present specification may include the features of FIGS. 1 to 9 described above. However, for convenience of description, overlapping content may be compressed or omitted.

In addition, the second preferred embodiment of the present specification, which will be described later, is not distinguished from the first embodiment of the present specification, and will be described separately for convenience. The display device according to the first embodiment of the present specification may implement a method of detecting the replacement timing of the filter mounted in the display device according to the second embodiment to be described later.

10 to 12 are diagrams illustrating a display device including a plurality of sensors according to the first embodiment of the present specification.

According to FIG. 10 , the display device 10 according to the first embodiment of the present specification includes a display module 100 , a controller 102 , a power supply 103 , a transparent substrate 104 , a first sensor 101A, It may include a second sensor 101B and an alarm unit 114 .

Referring to FIG. 10 , the display device 10 of the present specification includes a display module 100 that displays a screen on one surface, a transparent substrate 104 that covers one surface on which a screen is displayed, a transparent substrate 104 and a display module 100 . ) may include a first sensor 101A positioned between. The first sensor 101A may be protected from external impact by the transparent substrate 104 . The display device 10 may further include a second sensor 101B positioned outside the transparent substrate 104 .

The first sensor 101A and the second sensor 101B may be temperature sensors. The first sensor 101A may measure an internal temperature of the display device 10 , and the second sensor 101B may measure an external temperature of the display device 10 . For more accurate temperature measurement, the first sensor 101A may be located at or around the top inside the display device 10 , and the second sensor 101B is located at the bottom outside the display device 10 . It can be located or located around the bottom.

The position of the first sensor 101A is to more accurately and quickly measure the increase in the temperature inside the display device 10, and the position of the second sensor 101B is to consider geothermal heat as much as possible. have.

In addition, in order to prevent the screen displayed on one surface of the display device 10 from being blocked due to the first sensor 101A, the inner surface of the transparent substrate 104 or the edge of any one of the one surface of the display module 100 . can be located in

The control unit 102 may generate a notification message for checking or replacing the filter based on the local time and the temperature transmitted from the first sensor 101A and the second sensor 101B. The notification message may mean a message notifying that the filter life has expired or the filter is clogged. In addition, the meaning that the filter is clogged may mean a state in which the efficiency of the filter for filtering dust or the like has fallen to 60% or less. In addition, the meaning that the filter is clogged may mean that the life of the filter is over.

Local time can be divided into day time and night time. Daytime may mean a time from sunrise to before sunset. Night time may mean a time other than day time.

The controller 102 may include a processor (not shown) for generating a notification message. The processor is a component capable of performing calculations and controlling other devices. Mainly, it may mean a central processing unit (CPU), an application processor (AP), a graphics processing unit (GPU), or the like. In addition, the CPU, AP, or GPU may include one or more cores therein, and the CPU, AP, or GPU may operate using an operating voltage and a clock signal. However, a CPU or AP may consist of a few cores optimized for serial processing, whereas a GPU may consist of thousands of smaller and more efficient cores designed for parallel processing.

In addition, the controller 102 may further include a memory (not shown) for storing the sensed values transmitted from the first sensor 101A and the second sensor 101B. The memory (not shown) may include, but is not limited to, a hard disk drive (HDD), a solid state disk (SSD), a silicon disk drive (SDD), a ROM, a RAM, and the like.

When the internal temperature is greater than the reference temperature according to the local time, the controller 102 may obtain a difference value between the current rotation speed of the fan and the rotation speed input to the fan. The controller 102 may detect the state of the fan based on the obtained difference value. At this time, the state of the fan can be divided into a normal state and a failure state. The reference temperature may mean a threshold temperature at which the display apparatus 10 can operate when sunlight is directly incident on the screen of the display apparatus 10 .

In this case, the reference temperature may mean a threshold temperature at which the display apparatus 10 can operate when sunlight is directly incident on the screen of the display apparatus 10 .

In addition, the reference temperature may have different cooling performance depending on the design of the display device 10 . Therefore, a simulation of applying external heat and internal heat to the display device 10 is performed, and the reference temperature is determined based on the simulation result data. can be set.

In addition, when the reference temperature is set, the maximum value of the internal temperature in the two worst environments for the display device 10 may be the reference. For example, in the simulation, sunlight is incident on the display device 10 , and in this case, the highest temperature that guarantees the operation of the display device 10 may be measured. In this case, the highest measured temperature may be set as the reference temperature.

The controller 102 may detect the fan as a normal state when the obtained difference value is within a preset range (eg: within 20% of the input rotation speed). Also, when the obtained difference value is outside a preset range (eg: more than 20% of the input rotation speed), the controller 102 may detect the fan as a failure state.

Referring to FIG. 10 , the display device 10 may further include a third sensor 101C for sensing the internal temperature of the display device 10 or the housing. The controller 102 may acquire a difference value between the sensing values of the first sensor 101A and the third sensor 101C. The controller 102 may detect the state of the first sensor 101A based on the obtained difference value. At this time, the state of the first sensor 101A may be divided into a normal state and a failure state.

The controller 102 may detect the first sensor 101A as a normal state when the obtained difference value is within a preset range (eg, within 20% of the sensed value of the third sensor 101C). In addition, the controller 102 may detect the first sensor 101A as a failure state when the obtained difference value is outside a preset range (eg: more than 20% of the sensed value of the third sensor 101C).

Also, in order to obtain an accurate difference value between the first sensor 101A and the third sensor 101C, the first sensor 101A and the third sensor 101C may be located adjacent to each other.

When the control unit 102 detects the state of the fan and/or the first sensor 101A as a normal state, the controller 102 determines the internal temperature of the display device 10 detected from the first sensor 101A and the second sensor 101B. A difference value between the detected external temperature of the display device 10 may be acquired. When the obtained difference value is greater than the target temperature, the controller 102 may generate a notification message for checking or replacing the filter. In this case, the target temperature may mean a difference value between the maximum internal temperature of the product and the maximum external temperature of the product.

The maximum internal temperature of the product may mean the lowest temperature among guaranteed temperatures at which each of the internal components of the display device 10 may operate. In addition, the maximum external temperature of the product may mean the maximum temperature of the external environment in which the display device 10 can operate. In this case, the guaranteed temperature may mean a temperature or a temperature range guaranteed by the manufacturer that the corresponding part can smoothly perform a desired operation. In this case, the external environment may mean an external environment in which the display device 10 is installed. It is assumed that the display device 10 is heated by receiving sunlight in an external environment in which the display device 10 is installed.

The alarm unit 114 may receive a notification message from the control unit 102 and output a warning. The alarm unit 114 may include a lamp and output a warning through the lamp. Alternatively, the alarm unit 114 may include a speaker and output a warning through the speaker. Alternatively, the alarm unit 114 may include a display and output a visual message through the display. Alternatively, the alarm unit 114 may transmit a warning to an external server through wireless communication and/or wired communication.

Referring to FIG. 10 , the display apparatus 10 of the present specification may drive the fans FAN, 106A, and 106B according to a control signal to circulate the betting and outdoor air of the display apparatus 10 . The control unit 102 may generate a control signal. In this case, the bet may mean the air that stayed inside the display device 10 , and the outside air may mean the air outside the display device 10 . Also, the fan may refer to any device capable of circulating air.

Also, although not shown in FIG. 10 , the sensing value sensed by the first sensor 101A and/or the second sensor 101B may be transmitted to the controller 102 . This can be clearly derived from FIG. 10 by a person skilled in the art.

Referring to FIG. 10 , the display device 10 of the present specification may include a power supply 103 . The power supply 103 may supply power to the control unit 102 and the display module 100 . In addition, the power supply 103 may supply power to all components requiring power in the display device 10 . In this case, the power supply 103 may supply power by itself, including a battery, and may convert power supplied from the outside into a voltage required for the display device 10 and transmit it to the display device 10 . Also, the power supply 103 may convert AC to DC or DC to AC in some cases.

According to FIG. 11 , the display device 10 of the present specification includes a first filter 108A mounted at a position corresponding to the first fan 106A, and a first cover part 107A that covers the first filter 108A. may further include. In addition, the display device 10 of the present specification further includes a second filter 108B mounted at a position corresponding to the second fan 106B, and a second cover part 107B that covers the second filter 108B. can do.

According to FIG. 11 , the first filter 108A and the first cover part 107A are positioned on the rear surface of the housing, and the second filter 108B and the second cover part 107B are positioned on the lower part of the rear surface of the housing. can do. Since these features are the same as those described above with reference to FIGS. 2 and 3 , they are omitted.

According to FIG. 11 , the first fan 106A may include two fans FAN, and the second fan 106B may include one fan FAN. The number of such fans is only an example and does not limit the scope of the present specification.

The first fan 106A and the second fan 106B may simultaneously send out the bet of the display device 10 to the outside, or bring in the outside air of the display device 10 to the inside. Also, the first fan 106A and the second fan 106B may circulate air in opposite directions.

According to FIG. 11 , the first fan 106A may send the bet of the display device 10 to the outside. This is because the hot air inside the display device 10 rises, so that it is effectively expelled to the outside. The first fan 106A may rotate in a direction to send out the bet to the outside. Also, the second fan 106B may introduce outside air of the display device 10 to the inside. The second fan 106B may rotate in a direction to introduce outside air into the inside.

The second filter 108B may filter dust and the like from outside air introduced into the display device 10 due to the driving of the second fan 106B. The first filter 108A may filter dust or the like flowing into the display device 10 from the outside. Accordingly, the second filter 108B may be a HEPA filter, and the first filter 108A may be a mesh filter.

12 , the display device 10 according to the present specification may further include a plurality of temperature sensors. The display device 10 according to the present specification includes a temperature sensor 102A for measuring a temperature generated when the controller 102 operates, and a temperature for measuring a temperature generated when the power supply 103 operates. The sensor 103A or a third sensor 101C for measuring a temperature inside the housing of the display device 10 may be further included.

13 is a diagram illustrating a display device further including a communication device or a learning device according to the first embodiment of the present specification.

Referring to FIG. 13 , the display device 10 of the present specification may further include a communication device 109 and/or a learning device 110 connected to the controller 102 .

The communication apparatus 109 according to the present specification may wirelessly exchange signals with an external device. The communication apparatus 109 may exchange a signal with an external device through a network or may directly exchange a signal with an external device. The external device may include at least one of a server, a mobile terminal, and another vehicle.

The communication device 109 may include at least one of an antenna, a radio frequency (RF) circuit capable of implementing at least one communication protocol, and an RF element to perform communication. According to an embodiment, the communication device 109 may use a plurality of communication protocols. The communication device 109 may switch the communication protocol according to the distance from the mobile terminal.

The communication device 109 may include a modulator, a demodulator, a signal processor, and the like. Communication device 109 is CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), SC-FDMA (single carrier frequency division multiple access) It may be used in various wireless communication systems, such as, and the like, and the communication device 109 may also be used in 3rd generation partnership project (3GPP) long term evolution (LTE) and the like. However, in the present specification, a pre-installed communication network may be utilized without being limited by such a wireless communication method.

The display device 10 according to the present specification may receive air quality information including the local time as well as the concentration of fine dust in the area where the display device 10 is installed through the communication device 109 from an external server in real time. have.

The controller 102 of the present specification may control the fan in consideration of air quality information including the received fine dust concentration and the like.

For example, the display device 10 may receive information on the concentration of fine dust from an external server through the communication device 109 . When the fine dust concentration is greater than a preset value, the controller 102 may lower the fan revolution per minute (RPM) to reduce the inflow of outside air.

The learning apparatus 110 may learn values sensed by sensors included in the display apparatus 10 . That is, the learning device 110 may be configured to utilize artificial intelligence or machine learning.

The learning apparatus 110 may store the sensed values sensed for each local time and utilize the stored values. For example, the learning device 110 may sense the external temperature for a specific period and average it. The controller 102 may change the second temperature, which is a standard for external environment inspection of the display apparatus 10 , based on the average external temperature.

For example, when the average external temperature rises, the second temperature, which is a standard for external environmental inspection, may also be adjusted upward accordingly. Conversely, if the average external temperature decreases, the second temperature may also be adjusted downward accordingly.

According to FIG. 13 , the fan includes a motor 106M that generates power for circulating air inside the display device 10 and air outside the display device 10 and a current sensor for sensing a current flowing in the motor 106M ( 106S) may be further included.

The control unit 102 may sense the state of the fan based on the current value transmitted from the current sensor 106S. That is, when a current value greater than a current value required to implement the RPM input to the fan is sensed, the controller 102 may obtain a difference value between the two current values. The controller 102 may detect the state of the fan based on the obtained difference value. At this time, the state of the fan can be divided into a normal state and a failure state.

The motor 106M and the current sensor 106S may also be included in the display device 10 of FIGS. 10 to 12 . The control unit 102 of FIGS. 10 to 12 may also detect the state of the fan in the same way.

14 to 16 are views illustrating cross-sections of a display device in which a plurality of fans are positioned around both ends of the display device according to the first embodiment of the present specification. Also, FIG. 17 is a diagram specifically illustrating a second fan 106B according to the first embodiment of the present specification.

14 , the display device 10 may include a first fan 106A and a second fan 106B. In this case, the first fan 106A and the second fan 106B may be symmetrical to each other or may be asymmetrical. That is, the portion A may be equally provided at the upper end and lower end of the display device 10 . In addition, the B portion may be equally provided at the upper end and the lower end of the display device 10 . In addition, part A may be positioned at the upper end of the display device 10 , and part B may be positioned at the lower end of the display device 10 .

14 , the display device 10 may include a body 115 therein. A circuit board such as a control unit may be installed or attached to the body 115 . Also, internal components of the display device 10 may be arranged around the body 115 .

The body 115 may have a plate shape corresponding to the display module. In addition, there is a hole in the body 115, and air may flow in and out through the hole. A fan may be inserted into the hole to allow air to flow in and out through the hole.

The body 115 includes an inner wall through which internal air can be directed to the first opening 113A. That is, the inner wall can divert the air direction so that the inner air can flow in a desired direction.

According to FIG. 15 , a portion A of the display device 10 may include a first fan 106A. The first fan 106A may include a first support member 106AS capable of fixing the fan and transmitting electric power to the fan. The first support member 106AS may be connected to one end of the display module 100 . The first support member 106AS may receive power from the display module 100 and use the received power to rotate the first fan 106A. Also, the first support member 106AS may receive power from the power supply 103 and use the received power to rotate the first fan 106A. The first support member 106AS may include a rotation motor (not shown) that rotates by receiving electric power, and a rotation shaft (not shown) that transmits power from the rotation motor.

15 , the first fan 106A may include a first housing 106AF connected to a support member. A plurality of fans may be included in the first housing 106AF. Referring to other drawings, two fans may be included in the first housing 106AF.

15 , the first fan 106A may be disposed to face downward. Also, the first opening 113A may be spaced apart from the first fan 106A. The first opening 113A may be located under the first fan 106A. A first flow path 105A may be formed between the first opening 113A and the first fan 106A. The first flow path 105A may be positioned between the first opening 113A and the first fan 106A.

Referring to FIG. 15 , the first opening 113A may be located at a location spaced apart from the lower portion of the first fan 106A by a predetermined distance. This is to prevent the first fan 106A and the first opening 113A from being overlapped or installed to overlap. A thinner display device 10 may be implemented through the positioning of each configuration. In addition, the first fan 106A may direct the hot air inside the display device 10 downward in order to realize more efficient air exhaust through the positioning of each of these components.

15 , hot air inside the display device 10 may move through the first flow path 105A. The hot air inside the display device 10 obtains power to move by the first fan 106A. The hot air inside the display device 10 may be discharged to the outside through the first opening 113A and the first filter 108A.

The first filter 108A may have the same shape as the cross-sectional shape of the first opening 113A. This is for the first filter 108A to be installed in the first opening 113A without a gap. The first filter 108A may be a mesh filter. The first filter 108A may be a filter for preventing dust from the outside of the display device 10 from entering the inside of the display device 10 .

15 , the hot air inside the display device 10 moves along the first flow path 105A and is directed toward the first opening 113A by a wall provided at one end of the first flow path 105A. can

According to FIG. 16 , part B of the display device 10 may include a second fan 106B. The second fan 106B may include a first body 106BH1 and a second body 106BH2. The first body 106BH1 may be connected to the second body 106BH2. One surface of the first body 106BH1 may be closed, and may have a tapered shape toward the closed surface. The other surface of the first body 106BH1 is open, and air may move through the other open surface. Due to the closed one surface of the first body 106BH1, air may more easily move through the other surface.

16 , the other open surface of the first body 106BH1 may be disposed toward the display module 100 . The other open surface of the first body 106BH1 may be disposed toward an upper portion of the display device 10 . Both sides of the second body 106BH2 may be open. An open surface of the second body 106BH2 may face the second opening 113B. The other open surface of the second body 106BH2 may be connected to the first body 106BH1 .

15 and 16 , external air of the display device 10 may be introduced into the display device 10 by rotation of the second fan 106B. External air may be introduced through the second opening 113B. External air may be introduced through the second filter 108B and filtered by the second filter 108B. Microorganisms, dust, etc. included in the external air may be filtered by the second filter 108B.

Referring to FIG. 17 , the other open surface of the second body 106BH2 may be connected to the first body 106BH1 . The first body 106BH1 may include a through hole that may be connected to the other open surface of the second body 106BH2. External air of the display device 10 may pass through both open surfaces of the second body 106BH2 through the second opening 113B. External air passing through the second body 106BH2 may be directed to the other open surface of the first body 106BH1 through the through hole of the first body 106BH1 .

Referring to FIG. 17 , the second body 106BH2 may include a fan blade 106BB therein. The second body 106BH2 may include a plurality of fan blades 106BB therein. In addition, the second body 106BH2 may further include a rotating motor (not shown) rotating by receiving power from the power supply 103 and a rotating shaft (not shown) transmitting power through rotation.

The flow of air may be changed in a right angle direction by the second fan 106B of FIG. 17 .

How to detect when to replace the filter mounted on the display device

Hereinafter, a method for detecting a replacement time of a filter mounted on a display device according to a second preferred embodiment of the present specification will be described in detail based on the above contents.

Hereinafter, in the description of the method of detecting the replacement timing of the filter mounted on the display device according to the second preferred embodiment of the present specification, the same or overlapping content as that of the first embodiment will be omitted, and only differences will be described.

Hereinafter, the subject of the method for detecting the replacement timing of the filter mounted on the display device according to the second exemplary embodiment of the present specification may be the display device, the sensor, or the control unit according to the first exemplary embodiment. This is apparent to those skilled in the art.

In addition, hereinafter, the expression “sensing” used in the method of detecting the replacement timing of the filter mounted on the display device according to the second preferred embodiment of the present specification means that the controller of the first embodiment described above uses the sensors to control the temperature. It may mean measuring the back.

18 is a diagram illustrating a method of detecting a replacement time of a filter mounted on a display apparatus using a plurality of sensors according to a second embodiment of the present specification.

Referring to FIG. 18 , the method of detecting the replacement timing of the filter mounted on the display device 10 includes the steps of detecting an internal temperature and an external temperature of the display device 10 ( S1100 ), and a region in which the display device 10 is installed. Counting the local time of (S1200), obtaining the replacement time of the filter based on the internal temperature, the external temperature and the local time (S1300), and generating a notification message based on the replacement time of the filter (S1400) , and outputting a warning message for the inspection or replacement of the filter according to the notification message (S1500).

19 is a diagram illustrating a method of obtaining a replacement time of a filter based on a target temperature according to a second embodiment of the present specification.

Referring to FIG. 19 , the method of detecting the replacement timing of the filter mounted on the display device 10 includes detecting an internal temperature and an external temperature of the display device 10 ( S2100 ), and a region where the display device 10 is installed. Counting the local time of (S2200), detecting whether the counted local time is daytime (S2300), if it is daytime, obtaining a difference value between the internal temperature and the external temperature (S2400) and the acquired It may include the step of detecting whether the difference value is greater than the target temperature (S2500).

In addition, according to FIG. 19 , the method of detecting the replacement time of the filter mounted on the display device 10 includes the step of detecting that the replacement time of the filter has arrived when the obtained difference value is greater than the target temperature (S2600) , generating a notification message based on the replacement time of the filter (S2700), and outputting a warning message for checking or replacing the filter according to the notification message (S2800) may be further included.

Also, according to FIG. 19 , when the obtained difference value is less than or equal to the target temperature, the process may return to the first step S2100 again.

In this case, the target temperature may mean a difference value between the maximum internal temperature of the product and the maximum external temperature of the product. Also, the maximum internal temperature of the product may mean the lowest temperature among guaranteed temperatures at which each of the internal components of the display device 10 may operate. In addition, the maximum external temperature of the product may mean the maximum temperature of the external environment in which the display device 10 can operate.

20 is a diagram illustrating a method of detecting a failure of a fan and/or a temperature sensor and obtaining a replacement time of a filter according to a second embodiment of the present specification.

Referring to FIG. 20 , the method of detecting the replacement timing of the filter mounted on the display device 10 includes the steps of detecting an internal temperature and an external temperature of the display device 10 ( S3100 ), and a region where the display device 10 is installed. It may include a step of counting the local time of (S3200), and a step of detecting the state of the fan and/or the temperature sensor 101A (S3300).

In addition, according to FIG. 20 , the method of detecting the replacement timing of the filter mounted on the display device 10 includes an internal temperature, an external temperature, and a local temperature when the state of the fan and/or the temperature sensor 101A is determined to be a normal state. Based on the time, obtaining the replacement time of the filter (S3400), based on the replacement time of the filter, generating a notification message (S3500), and according to the notification message, a warning message for the inspection or replacement of the filter The step of outputting (S3600) may be further included.

In addition, according to FIG. 20 , the method of detecting the replacement timing of the filter mounted on the display device 10 includes the steps of generating a notification message for the failure state when the state of the fan is determined to be a failure state ( S3311 ) and a notification According to the message, the method may further include outputting a warning message for fan inspection or replacement (S3312). After outputting the warning message, the process may proceed to step S3400.

In addition, according to FIG. 20 , the method of detecting the replacement timing of the filter mounted on the display device 10 includes the steps of generating a notification message for the failure state when the state of the temperature sensor 101A is determined to be a failure state ( S3311) and according to the notification message, the step of outputting a warning message for the inspection or replacement of the temperature sensor 101A (S3312) may be further included. After outputting a warning message, you can exit without performing any further steps.

21 is a diagram illustrating a method of detecting a replacement time of a filter mounted on a display apparatus using a plurality of sensors according to a second embodiment of the present specification.

According to FIG. 21 , the method of detecting the replacement timing of the filter mounted on the display device 10 includes detecting an internal temperature and an external temperature of the display device 10 ( S4100 ), and the detected internal temperature is the first temperature (ex: 30 ℃) step of detecting whether it is higher than (S4200), when the sensed internal temperature is higher than the first temperature, starting the fan (S4300), the local time of the area where the display device 10 is installed It may include a counting step (S4400).

In addition, according to FIG. 21 , the method of detecting the replacement timing of the filter mounted on the display device 10 includes determining whether the local time is daytime or nighttime ( S4500 ). In the case of daytime, the internal temperature is the standard The method may further include determining whether the temperature is higher than the temperature (S4600), and when the internal temperature is higher than the reference temperature, detecting the state of the fan and/or the temperature sensor 101A (S4700).

In addition, according to FIG. 21 , the method of detecting the replacement timing of the filter mounted on the display device 10 includes determining whether the local time is daytime or nighttime ( S4500 ), and when it is nighttime, the external temperature is first 2 The step of determining whether it is higher than the temperature (ex: 35° C.) (S4510), when the external temperature is higher than the second temperature, the step of generating a notification message for checking the external environment of the display device 10 (S4520) may include In addition, the method of detecting the replacement timing of the filter mounted on the display apparatus 10 may perform step S4700 after generating a notification message.

Also, according to FIG. 21 , the method of detecting the replacement timing of the filter mounted on the display device 10 includes determining whether the external temperature is higher than the second temperature (ex: 35° C.) in the case of night time (S4510) Thereafter, when the external temperature is lower than or equal to the second temperature, step S4100 may be performed again.

Also, according to FIG. 21 , the method of detecting the replacement timing of the filter mounted on the display device 10 includes detecting the state of the fan and/or the temperature sensor 101A ( S4700 ), the fan and the temperature sensor 101A ) is in a normal state, based on the temperature, external temperature and local time, obtaining a replacement time of the filter (S4800), based on the replacement time of the filter, generating a notification message (S4900) and a notification message Accordingly, the method may further include outputting a warning message for checking or replacing the filter ( S5000 ).

In addition, the method for detecting the replacement timing of the filter mounted on the display device 10 includes the steps of detecting whether the local time is daytime, obtaining a difference value between the internal temperature and the external temperature, the difference value is It may include detecting the filter as a clogged state when it is greater than the target temperature.

In addition, the method of detecting the replacement timing of the filter mounted on the display device 10 includes the steps of detecting whether the local time is night time, and when the external temperature is higher than a preset temperature, the display device 10 ), generating a notification message for checking the external environment, obtaining a difference value between the internal temperature and the external temperature, and detecting the filter as a clogged state when the difference value is greater than the target temperature. .

In addition, the method of detecting the replacement timing of the filter mounted on the display device 10 is a difference value between the current rotation speed of the fan and the rotation speed input to the fan when the internal temperature is greater than the reference temperature according to local time. The method may further include obtaining , and detecting the state of the fan based on the difference value. In addition, in the method of detecting the replacement time of the filter mounted on the display device 10 , the step of obtaining the replacement time of the filter is based on the internal temperature, the external temperature, and the local time, when the fan is detected in a normal state, the filter replacement time can be obtained.

In addition, the step of detecting the state of the fan and/or the temperature sensor 101A ( S4700 ) may include steps S3300 , S3311 , and S3312 in FIG. 20 . In addition, the step of detecting the state of the fan and/or the temperature sensor 101A ( S4700 ) may include steps S3300 , S3321 , and S3322 in FIG. 20 .

Any or other embodiments of the present invention described above are not mutually exclusive or distinct. Certain embodiments or other embodiments of the present invention described above may be combined or combined with respective configurations or functions.

The above detailed description should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

10: display device
100: display module
101A: first sensor
101B: second sensor
101C: third sensor
102: control unit
103: power supply
104: transparent substrate
106A: first fan
106B: second fan
114: alarm unit

Claims (20)

A display device including a display module, comprising:
a timer for counting the local time of a region in which the display device is installed;
a housing including the display module therein and including an opening for inflow and outflow of air;
a filter mounted on the opening;
a fan for circulating the outside air and the inside air of the housing through the filter;
a first sensor for sensing an internal temperature of the housing;
a second sensor for sensing an external temperature of the housing; and
A control unit for generating a notification message for checking or replacing the filter based on the local time and the temperature transmitted from the first sensor and the second sensor;
The control unit is
According to the local time, when the internal temperature is greater than the reference temperature, a difference value between the current rotation speed of the fan and the rotation speed input to the fan is obtained, and based on the difference value, whether the fan is operating normally to detect,
A third sensor for sensing the internal temperature of the housing; further comprising,
The control unit is
When the internal temperature is greater than the reference temperature determined based on the local time, a difference value between the sensing values of the first sensor and the third sensor is obtained, and whether the first sensor is normally operated based on the difference value to detect,
The control unit is
Detect whether it is daytime or night time based on the local time,
When the local time is night time and the external temperature is higher than a preset temperature, a notification message for checking the external environment of the display device is generated,
When the local time is daytime, a difference value between the internal temperature and the external temperature is obtained, and when the difference value is greater than a target temperature, the display device detects that the filter is in a clogged state. delete delete According to claim 1,
The control unit is
When the state of the fan and the first sensor is detected as a normal state, a difference value between the internal temperature and the external temperature is acquired. 5. The method of claim 4,
The control unit is
When the difference value is greater than the target temperature, the display device to generate a notification message for checking or replacing the filter. 6. The method of claim 5,
The target temperature means the difference between the maximum internal temperature of the product and the maximum external temperature of the product,
The maximum internal temperature of the product is
It means the lowest temperature among the guaranteed temperatures at which each of the internal components of the display device can operate,
The maximum external temperature of the product is,
The display device, which means the maximum temperature of the external environment in which the display device can operate. According to claim 1,
The reference temperature is
When sunlight is directly incident on the screen of the display device, it means a threshold temperature at which the display device can operate, the display device. According to claim 1,
the fan,
a motor for generating power for circulating the bet and the outside air; and
A display device comprising a; a current sensor for sensing a current flowing through the motor. 9. The method of claim 8,
The control unit is
A display device that receives a sensed value sensing the amount of current flowing through the motor from the current sensor, and senses the state of the fan based on the sensed value. According to claim 1,
The local time will be the time from sunrise to before sunset, the display device. According to claim 1,
the fan,
a first fan located above the display device; and
and a second fan located under the display device. 12. The method of claim 11,
The housing includes a front surface and a rear surface,
The housing is
a first opening located on the rear surface, the first opening being located around the first fan; and
and a second opening located on the rear surface of the second fan and positioned around the second fan. 13. The method of claim 12,
The filter is
a first filter mounted on the first opening; and
A display device comprising a; a second filter mounted on the second opening. 14. The method of claim 13,
The first filter is a mesh filter, and the second filter is a HEPA filter. According to claim 1,
The display device further comprising a; alarm unit for outputting a warning by receiving the notification message from the control unit. A method for detecting replacement time of a filter mounted on a display device, the method comprising:
detecting an internal temperature and an external temperature of the display device;
counting the local time of a region where the display device is installed;
obtaining a replacement time of the filter based on the internal temperature, the external temperature, and the local time;
generating a notification message based on the replacement time of the filter; and
In accordance with the notification message, outputting a warning message for the inspection or replacement of the filter;
The step of obtaining the replacement time of the filter comprises:
detecting whether the local time is Daytime;
obtaining a difference value between the internal temperature and the external temperature; and
When the difference value is greater than the target temperature, detecting the filter as a clogged state; including,
In addition, the step of obtaining the replacement time of the filter,
detecting whether the local time is night time;
generating a notification message for checking an external environment of the display device when the external temperature is higher than a preset temperature;
obtaining a difference value between the internal temperature and the external temperature; and
When the difference value is greater than the target temperature, detecting the filter as a clogged state; including,
According to the local time, when the internal temperature is greater than the reference temperature, a difference value between the current rotation speed of the fan and the rotation speed input to the fan is obtained, and based on the difference value, it is determined whether the fan is operating normally. detecting; further comprising,
The step of obtaining the replacement time of the filter comprises:
When it is detected that the fan is in a normal state, the replacement timing of the filter mounted on the display device is to be acquired based on the internal temperature, the external temperature, and the local time. delete delete 17. The method of claim 16,
The target temperature means the difference between the maximum internal temperature of the product and the maximum external temperature of the product,
The maximum internal temperature of the product is
It means the lowest temperature among the guaranteed temperatures at which each of the internal components of the display device can operate,
The maximum external temperature of the product is,
A method of detecting the replacement timing of a filter mounted on the display device, which means the maximum temperature of an external environment in which the display device can operate. delete

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