CN110687717A - Heat exchange device and display device - Google Patents
Heat exchange device and display device Download PDFInfo
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- CN110687717A CN110687717A CN201810724400.5A CN201810724400A CN110687717A CN 110687717 A CN110687717 A CN 110687717A CN 201810724400 A CN201810724400 A CN 201810724400A CN 110687717 A CN110687717 A CN 110687717A
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- heat exchange
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
- F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133628—Illuminating devices with cooling means
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention discloses a heat exchange device, which is used for an electronic device with a light source module and comprises an internal heat exchange part and an external heat exchange part. The internal heat exchange part is used for being adjacently attached to the light source module, and is provided with at least one internal heat dissipation ventilating duct which is communicated with the electronic device space. The external heat exchange portion is in heat-conducting contact with the internal heat exchange portion, and has an external heat dissipation structure that is not communicated with the at least one internal heat dissipation air duct. The invention also discloses a display device.
Description
Technical Field
The present invention relates to a heat exchange device and a display device, and more particularly, to a heat exchange device with good heat dissipation and a display device using the same.
Background
With the development of technology, the demand for display devices for displaying images is gradually increasing, and in recent years, different types of display devices, such as Liquid Crystal Displays (LCDs), Plasma Display Panels (PDPs), Organic Light Emitting Displays (OLEDs), and the like, have been used. The light source module located inside the display device mainly functions to provide a light source for the display device.
Taking a liquid crystal display as an example, the liquid crystal display generally includes a liquid crystal unit, a backlight module and a frame. The light source of the backlight module can be a linear light source or a point light source, and the light is converted into a surface light source with high brightness and good uniformity through the light guide plate. The heat generated by the light source of the backlight module is collected to the frame of the liquid crystal display, and generates heat in the inner space of the frame.
The heat in the internal space of the display device may affect the normal functions of the electronic components, for example, the electronic power supply system may become unstable or even have a reduced lifetime due to the temperature rise in the internal space of the display device, and the optical components may be deformed. In addition, if the temperature of the display device is too high (for example, the display device is placed outdoors at a high ambient temperature), the liquid crystal inside the display device may be liquefied or yellowed.
Disclosure of Invention
In view of the above problems, the present invention discloses a heat exchanging device and a display device using the same, which is helpful for solving the problem that the normal functions of internal electronic components are affected due to poor heat dissipation of the display device.
The invention provides a heat exchange device, which is used for an electronic device with a light source module and comprises an internal heat exchange part and an external heat exchange part. The internal heat exchange part is used for being adjacently attached to the light source module and provided with at least one internal heat dissipation ventilating duct, the internal heat dissipation ventilating duct is communicated with the electronic device space of the electronic device, and the at least one internal heat dissipation ventilating duct is used for providing high-temperature airflow generated by the light source module to flow between the electronic device space and the at least one internal heat dissipation ventilating duct. The external heat exchange part is in heat conduction contact with the internal heat exchange part, the external heat exchange part is provided with an external heat dissipation structure which is not communicated with the at least one internal heat dissipation ventilating duct, and the external heat dissipation structure is used for providing circulation of ambient air flow in the external heat dissipation structure.
In one embodiment, the external heat dissipation structure has at least one external heat dissipation air channel, and the at least one external heat dissipation air channel is used for providing the circulation of the ambient air flow in the at least one external heat dissipation air channel.
In one embodiment, the external heat dissipation structure is a plurality of heat dissipation fins, and the heat dissipation fins are used for providing the ambient air flow to circulate among the heat dissipation fins.
In an embodiment, the internal heat exchange portion further has an inner side facing the light source module, the external heat exchange portion further has an outer side opposite to the inner side, and the at least one internal heat dissipation air channel and the at least one external heat dissipation air channel are between the inner side and the outer side.
In one embodiment, the number of the at least one internal heat dissipation air channel and the number of the at least one external heat dissipation air channel are arranged in a plurality of rows.
In one embodiment, the total area of the ventilation cross sections of the internal heat dissipation air channel and the external heat dissipation air channel accounts for 35% to 70% of the cross sectional area of the internal heat exchange portion and the external heat exchange portion.
In one embodiment, the heat exchange device further includes a plurality of heat dissipation fins respectively disposed in at least one of the at least one internal heat dissipation air channel and the at least one external heat dissipation air channel.
The invention provides a display device, which comprises a display assembly and a heat exchange device. The internal heat exchange part of the heat exchange device is used for being adjacently attached to the display assembly, and the at least one internal heat dissipation air duct is used for providing high-temperature airflow generated by the display assembly to flow between the space of the display assembly and the at least one internal heat dissipation air duct.
In an embodiment, the display device further includes a frame and a first airflow generator disposed in the frame, wherein the frame includes a display side frame portion and a back frame portion opposite to each other, the display assembly further includes a display unit and a backlight module, the display unit is exposed from the display side frame portion, the heat exchange device is disposed in the back frame portion, the backlight module is adjacently attached to an internal heat exchange portion of the heat exchange device and is in heat conduction contact with the internal heat exchange portion, and the first airflow generator corresponds to the at least one internal heat dissipation ventilation duct.
In one embodiment, the display device further includes a display unit, a backlight module and a cavity, wherein the cavity is located between the display unit and the backlight module, and the cavity has a display device space.
In an embodiment, the display device further includes a cover disposed on the frame and a second airflow generator disposed on the cover, and the second airflow generator corresponds to the external heat dissipation structure.
In addition, the internal heat dissipation air channel and the external heat dissipation air channel are not communicated with each other, so that moisture and dust of the external environment can be prevented from entering the interior of the display device through the air channels, and the display device is more suitable for being placed outdoors.
The above description of the present invention and the following description of the embodiments are provided to illustrate and explain the spirit and principles of the present invention and to provide further explanation of the invention as claimed in the appended claims.
Drawings
Fig. 1A to 1D are schematic views illustrating a heat exchange device for an electronic device having a light source module according to a first embodiment of the invention.
Fig. 2 is a perspective view of a display device according to a first embodiment of the invention.
Fig. 3 is an exploded view of the display device of fig. 2.
Fig. 4 is a perspective view of a heat exchange device of the display device of fig. 3.
Fig. 5 is a cross-sectional view of the heat exchange device of fig. 4 along cross-sectional line a-a.
Fig. 6 is a cross-sectional view of the display device of fig. 2.
Fig. 7 is a sectional view schematically showing a display device according to a second embodiment of the present invention.
Fig. 8 is a sectional view schematically showing a heat exchange apparatus of a display apparatus according to a third embodiment of the present invention.
Fig. 9 is a schematic sectional view of a heat exchange device of a display device according to a fourth embodiment of the present invention.
Fig. 10 is an exploded view of a display device according to a fifth embodiment of the present invention.
Fig. 11 is a cross-sectional view of the display device of fig. 10.
Wherein, the reference numbers:
1. 2, 3 display device
10 frame body
110 display side frame part
111 display aperture
120 back frame part
121 assembly opening
130 accommodation space
20 display assembly
210 display unit
211 liquid crystal layer
212 protective glass
220 backlight module
221 optical film
222. 222a light source
230 cavity
231 display component space
310 wind flow generator
310a first wind flow generator
310b second wind flow generator
320. 320a, 320b heat exchange device
321 internal heat exchange part
3211. 3211a internal heat dissipating air duct
3212 medial side
322 external heat exchange site
3221. 3221a external heat-dissipating air duct
3222 lateral surface
323 assembly structure
40 cover body
A0 Cross section
A1, A2 ventilation cross section
AF ambient air flow
ED electronic device
ES electronic device space
F1, F2 radiator fin
HF high temperature gas flow
Length of L
LM light source module
OS external heat dissipation structure
Width W
Detailed Description
The detailed features and advantages of the present invention are described in detail in the embodiments below, which are sufficient for anyone skilled in the art to understand the technical contents of the present invention and to implement the present invention, and the related objects and advantages of the present invention can be easily understood by anyone skilled in the art according to the disclosure of the present specification, the protection scope of the claims and the attached drawings. The following examples further illustrate aspects of the present invention in detail, but are not intended to limit the scope of the invention in any way.
Please refer to fig. 1A to fig. 1D. Fig. 1A to 1D are schematic views illustrating a heat exchange device for an electronic device having a light source module according to a first embodiment of the invention. The heat exchanging device 320 may be disposed adjacent to the light source module LM of the electronic device ED to assist the electronic device ED in dissipating heat, and the electronic device ED may be a display device or a lighting device. When the electronic device ED is a display device, the light source module LM can be a backlight module; when the electronic device ED is a lighting device, the light source module LM can be a lighting source.
Further, the heat exchange device 320 includes an inner heat exchange portion 321 and an outer heat exchange portion 322.
The internal heat exchange portion 321 is disposed adjacent to a back surface (i.e., a surface away from the light emitting surface) of the light source module LM, and the internal heat exchange portion 321 has at least one internal heat dissipation duct 3211, and the at least one internal heat dissipation duct 3211 is communicated with an electronic device space ES of the electronic device ED, that is, a high-temperature air flow HF generated by the electronic device ED can flow between the electronic device space and the at least one internal heat dissipation duct 3211.
The external heat exchange portion 322 is in thermal contact with the internal heat exchange portion 321, and the external heat exchange portion 322 has an external heat dissipation structure OS not communicated with the at least one internal heat dissipation air duct 3211, that is, an air flow (e.g., high temperature air flow HF) flowing in the at least one internal heat dissipation air duct 3211 does not flow to the external heat dissipation structure OS, and an air flow (e.g., external ambient air flow AF) flowing in the external heat dissipation structure OS does not flow to the at least one internal heat dissipation air duct 3211. In one embodiment, the external heat dissipation structure OS has at least one external heat dissipation air duct 3221. In another embodiment, the external heat dissipation structure OS is at least one external heat dissipation air duct 3221 having a plurality of heat dissipation fins F1 therein. In yet another embodiment, the external heat dissipation structure OS is a plurality of heat dissipation fins F2.
Various embodiments of the heat exchange device 320 will be described below.
As shown in fig. 1A, at least one internal heat dissipation air channel 3211 is multiple (five for example); and the external heat dissipation structure OS has at least one external heat dissipation air duct 3221, and the number of the at least one external heat dissipation air duct 3221 is exemplified by five. The internal heat exchange portion 321 also has an inner side surface 3212 facing the light source module LM. The external heat exchange portion 322 further has an outer side 3222 opposite to the inner side 3212, and at least one internal heat dissipation duct 3211 and at least one external heat dissipation duct 3221 are between the inner side 3212 and the outer side 3222.
As shown in fig. 1B, the number of the at least one inner heat dissipation air channel 3211 is five as an example, and the outer heat dissipation structure OS is a plurality of heat dissipation fins F2.
As shown in fig. 1C, the number of the at least one internal heat dissipation duct 3211 is one as an example, and a plurality of heat dissipation fins F1 are disposed inside the internal heat dissipation duct 3211; and the external heat dissipation structure OS is a plurality of heat dissipation fins F1.
As shown in fig. 1D, the number of the at least one internal heat dissipation duct 3211 is one as an example, and a plurality of heat dissipation fins F1 are disposed inside the internal heat dissipation duct 3211; and the external heat dissipation structure OS has at least one external heat dissipation air duct 3221, and the number of the at least one external heat dissipation air duct 3221 is exemplified by one, and a plurality of heat dissipation fins F1 are disposed inside the external heat dissipation air duct 3221.
It should be noted that the structure of the heat exchanging device 320 shown in fig. 1A to 1D is only an example and not limited thereto.
To specifically describe the heat dissipation mechanism of the heat exchange device 320, the heat exchange device 320 is applied to the display device 1 as an example, the number of the at least one inner heat dissipation air channel 3211 of the inner heat exchange portion 321 is illustrated as a plurality, and the outer heat dissipation structure OS of the outer heat exchange portion 322 is illustrated as a plurality of outer heat dissipation air channels 3221.
Please refer to fig. 2 and fig. 3. Fig. 2 is a perspective view of a display device according to a first embodiment of the invention. Fig. 3 is an exploded view of the display device of fig. 2. In the present embodiment, the display device 1 includes a frame 10, a display module 20 and a heat exchange device 320. The display device 1 of the present embodiment is a Direct-lit (Direct-LED) liquid crystal display.
The frame 10 includes a display side frame portion 110 and a back frame portion 120 opposite to each other. The display side frame portion 110 has a display opening 111, and the back frame portion 120 has an assembly opening 121. The frame 10 has an accommodating space 130 communicating with the display opening 111 and the assembly opening 121.
The display assembly 20 is disposed in the accommodating space 130 of the frame 10. The display assembly 20 includes a display unit 210 and a backlight module 220. The display unit 210 includes a liquid crystal layer 211 and a protective glass 212. The protective glass 212 is disposed in the display opening 111 of the display side frame portion 110 of the frame body 10, and the liquid crystal layer 211 is exposed from the display opening 111. The backlight module 220 includes an optical film 221 and a light source 222, wherein the optical film 221 may include a diffusion sheet or a brightness enhancement sheet. In addition, the display device 20 further includes a cavity 230 between the display unit 210 and the backlight module 220, and the cavity 230 has a display device space 231. The display module space 231 communicates with the accommodating space 130 of the frame 10.
The heat exchanging device 320 is provided in the frame 10. Referring to fig. 4 to 6, fig. 5 is a cross-sectional view of the heat exchange device of fig. 4 along a cross-sectional line a-a, and fig. 6 is a cross-sectional view of the display device of fig. 2.
The display device 1 further includes a plurality of wind current generators 310. The wind flow generator 310 is disposed in the accommodating space 130 of the frame 10 and is used for generating an air flow in the accommodating space 130. The number of the wind flow generators 310 is not limited to the number of the guiding fans.
The heat exchanging device 320 is, for example but not limited to, a metal plate made of aluminum, and includes an internal heat exchanging portion 321 and an external heat exchanging portion 322 connected and in heat-conducting contact with each other, wherein the internal heat exchanging portion 321 has a plurality of internal heat dissipating air channels 3211, and the external heat exchanging portion 322 has a plurality of external heat dissipating air channels 3221. The internal heat-radiating air duct 3211 of the internal heat-exchanging portion 321 and the external heat-radiating air duct 3221 of the external heat-exchanging portion 322 do not communicate with each other. In detail, in a cross section a0 (a cross section taken along a cutting line a-a in fig. 4) of the heat exchange device 320, the inner heat dissipation duct 3211 and the outer heat dissipation duct 3221 are separated from each other, so that air in the inner heat dissipation duct 3211 and air in the outer heat dissipation duct 3221 cannot contact each other. The internal heat exchange portion 321 further has an inner side surface 3212 facing the display assembly 20, and the external heat exchange portion 322 further has an outer side surface 3222 opposite to the inner side surface 3212. The inner heat dissipation air duct 3211 and the outer heat dissipation air duct 3221 are both located between the inner side 3212 and the outer side 3222. The number of the inner heat dissipation air channel 3211 and the outer heat dissipation air channel 3221 is not intended to limit the present invention.
The heat exchanging device 320 is provided in the assembly opening 121 of the back frame portion 120 of the frame body 10. In detail, the heat exchange device 320 further includes an assembly structure 323 between the inner heat exchange portion 321 and the outer heat exchange portion 322. As shown in fig. 5, the inner heat dissipation air duct 3211 and the outer heat dissipation air duct 3221 are disposed on the left and right sides of a virtual reference line, and the virtual reference line passes through the assembly structure 323. In the present embodiment, the assembly structure 323 is a groove, which can receive a sealing ring (not shown), and the heat exchanging device 320 is installed in the assembly opening 121 through the tight interference between the sealing ring and the edge of the assembly opening 121. In another embodiment, the assembly structure can be filled with an adhesive to adhere to the edges of the assembly opening. In yet another embodiment, the assembling structure is a hook, which can be matched with a slot disposed at the edge of the assembling opening.
The internal heat exchanging portion 321 is located in the accommodating space 130, and the light source 222 of the backlight module 220 of the display assembly 20 is adjacently attached to the inner side surface 3212 of the internal heat exchanging portion 321 to be in heat conduction contact with the internal heat exchanging portion 321. In other words, the backlight module 220 is disposed between the display unit 210 and the heat exchanging device 320. The internal heat dissipation duct 3211 is communicated with the accommodating space 130, so that the airflow generated by the airflow generator 310 disposed in the frame 10 can pass through the internal heat dissipation duct 3211. The external heat exchange portion 322 protrudes from the assembly opening 121 to the back frame portion 120 of the frame body 10, and the external heat dissipation air duct 3221 communicates with the outside. In this embodiment, since the frame 10 separates the internal heat dissipation duct 3211 from the outside, and the internal heat dissipation duct 3211 and the external heat dissipation duct 3221 are designed to be not communicated with each other, external ambient air cannot flow into the internal heat dissipation duct 3211, and air in the frame 10 cannot flow into the external heat dissipation duct 3221.
The heat exchanging device 320 in this embodiment can help the display device 20 dissipate heat to lower the temperature of the display device 20, wherein the heat accumulated in the display device 20 is mainly generated by two places, namely, the solar light irradiated on the display device 20 and the light source 222 of the backlight module 220. As shown in fig. 6, the wind flow generator 310 generates an air flow in the accommodating space 130 of the frame 10 to pass the heat generated by the display assembly 20 through the cavity 230 and away from the backlight module 220, wherein the cavity 230 is located between the display unit 210 and the backlight module 220, and particularly between the liquid crystal layer 211 of the display unit 210 and the optical film 221 of the backlight module 220. Further, the heat energy generated by the sunlight directly irradiating the display unit 210 is transmitted to the cavity 230, and the heat energy is transmitted from the high temperature to the low temperature during the heat energy exchange process, or the wind flow generator 310 drives the internal high temperature air flow HF to pass through the cavity 230 and the accommodating space 130 and be brought to the internal heat dissipation air duct 3211 of the internal heat exchange portion 321 for circulation flow, so that the internal heat dissipation air duct 3211 is communicated with the inside of the display module 20, thereby providing the heat generated by the sunlight and the high temperature air flow HF inside the display module 20 to flow between the cavity 230 and the internal heat dissipation air duct 3211 inside the display module 20.
An ambient air flow AF (e.g., cool air) circulates within the external heat dissipation air duct 3221 of the external heat exchange portion 322. The high temperature air flow HF flows through the inside heat dissipation duct 3211 to make the temperature of the inside heat exchange portion 321 high, and the ambient air flow AF in the outside heat dissipation duct 3221 makes the temperature of the outside heat exchange portion 322 low. Thus, through the heat conduction contact between the internal heat exchange portion 321 and the external heat exchange portion 322, the heat generated by the display unit 210 and the backlight module 220 of the display device 20 is transferred to the external environment through the heat exchange device 320, which is helpful to reduce the temperature of the display device 20.
It should be noted that heat generated by the display module 20 through sunlight irradiation and heat generated by the light source 222 of the backlight module 220 can accumulate heat in the elements inside the display module 20, wherein the elements inside the display module 20 may include a polarizer (not shown), a color filter (not shown), an alignment film (not shown), the liquid crystal layer 211, an optical film (not shown), and the like, and therefore the heat exchanging device 320 is mainly used for dissipating heat to the elements inside the display module 20 to take away the heat accumulated.
The heat exchanging device 320 in this embodiment is used with the airflow generator 310 to dissipate heat of the display module 20 to effectively reduce the temperature of the display module 20, but the heat dissipating object of the heat exchanging device 320 is not intended to limit the present invention.
Table 1 below describes a comparison of heat dissipation results of the conventional display device and the display device of the first embodiment. As can be seen from table 1, under the condition that the light source power and the frame material of the backlight module are the same, the liquid crystal temperature of the conventional display device during operation is significantly higher than that of the display device of the first embodiment, which means that the heat exchange device disclosed in the present invention helps to dissipate heat of the internal components of the display device.
As shown in fig. 2 and 3, in the present embodiment, the size of the internal heat exchange portion 321 of the heat exchange device 320 matches the size of the assembly opening 121, and thus no gap is generated between the heat exchange device 320 and the edge of the assembly opening 121. The heat exchanging device 320 is disposed in the assembling opening 121 by, for example, but not limited to, fitting or gluing. Therefore, the design that the internal heat dissipation air duct 3211 and the external heat dissipation air duct 3221 are not communicated with each other helps to prevent moisture and dust in the external environment from entering the inside of the frame 10, so that the display device 1 is suitable for being placed outdoors. In other embodiments, it may be that the dimensions of the inner heat exchange site 321 and the outer heat exchange site 322 of the heat exchange device 320 match the dimensions of the assembly opening 121 at the same time.
In addition, in the present embodiment, the ventilation section a1 of each inner heat-radiating air duct 3211 of the inner heat-exchanging portion 321 and the ventilation section a2 of each outer heat-radiating air duct 3221 of the outer heat-exchanging portion 322 are rectangular. As shown in fig. 5, in a cross section a0 of the heat exchanging device 320, a section of each of the inner heat dissipating air channel 3211 and the outer heat dissipating air channel 3221 is the aforementioned ventilation section. The aspect ratio of the ventilation section a1, a2 of each of the inner heat dissipation air tunnels 3211 and the outer heat dissipation air tunnels 3221 is 1: 1 to 3: 1. in the present embodiment, the ventilation sections a1 and a2 are both rectangular sections having a length L of 18.5 millimeters (mm) and a width W of 15 mm. This helps prevent the display device 1 provided with the heat exchanging device 320 from being thinned due to an excessively large thickness of the heat exchanging device 320. It should be noted that the shapes of the ventilation section a1 of the inner heat dissipation duct 3211 and the ventilation section a2 of the outer heat dissipation duct 3221 are not intended to limit the present invention.
Furthermore, in the present embodiment, the heat exchanging device 320 is integrally formed. Thus, the heat exchanging device 320 is easy to manufacture and low in cost, and good heat conduction and contact between the inner heat exchanging portion 321 and the outer heat exchanging portion 322 can be ensured. It should be noted that the integrally formed heat exchange device 320 is not intended to limit the present invention. In other embodiments, the internal heat exchange portion and the external heat exchange portion are independent units, and the internal heat exchange portion and the external heat exchange portion are assembled to form the heat exchange device.
In addition, as shown in fig. 5, the sum of the areas of the ventilation sections a1 of all the inner heat radiating ventilation ducts 3211 and the areas of the ventilation sections a2 of all the outer heat radiating ventilation ducts 3221 (i.e., the total area of the ventilation sections a1, a 2) accounts for 35% to 70% of the area of the cross section a0 of the heat exchange device 320. Preferably, the total area of all the ventilation sections a1 and a2 accounts for 37% to 62% of the area of the cross section a0 of the inner heat exchange portion 321 and the outer heat exchange portion 322 of the heat exchange device 320. Thereby, it is helpful to make the inner heat dissipation air duct 3211 and the outer heat dissipation air duct 3221 have proper sizes for air flow to pass through, and simultaneously, the inner walls of the inner heat dissipation air duct 3211 and the outer heat dissipation air duct 3221 have enough heat dissipation surface areas to ensure good heat conduction contact between the air flow and the heat exchange device 320. In this embodiment, the total area of all ventilation sections a1 and all ventilation sections a2 (total area a1 × 8+ a2 × 8) accounts for 62% of the area of the cross section a0 of the inner heat exchange portion 321 and the outer heat exchange portion 322 of the heat exchange device 320.
Fig. 7 is a sectional view schematically showing a display device according to a second embodiment of the present invention. Since the second embodiment is similar to the first embodiment, only the differences will be described below.
In the present embodiment, the display device 2 further includes a cover 40 disposed on the frame 10, and a plurality of first wind flow generators 310a (i.e. the wind flow generators 310 in the first embodiment) and a plurality of second wind flow generators 310 b. The first wind flow generator 310a is disposed in the frame 10. The second wind flow generators 310b are disposed in the cover 40, and the second wind flow generators 310b correspond to the external heat radiating air duct 3221 of the external heat exchanging portion 322. The first airflow generator 310a is configured to bring the high-temperature airflow HF inside the frame 10 into the internal heat dissipation duct 3211 of the internal heat exchange portion 321. The second wind flow generator 310b serves to bring the external ambient air flow AF into the external heat dissipation air duct 3221 of the external heat exchange portion 322.
The second wind flow generator 310b forcibly generates the ambient air flow AF from the outside, thereby contributing to the improvement of the heat exchange efficiency between the internal heat exchange portion 321 and the external heat exchange portion 322. In addition, since the cover 40 covers the external heat exchange portion 322 of the protrusion frame 10, it is helpful to improve the appearance of the display device 2.
Fig. 8 is a sectional view schematically showing a heat exchange apparatus of a display apparatus according to a third embodiment of the present invention. Since the third embodiment is similar to the first embodiment, only the differences will be described below.
In the present embodiment, each of the inner heat dissipation air channel 3211a and the outer heat dissipation air channel 3221a of the heat exchange device 320a has a rectangular cross section with a length L of 35 millimeters (mm) and a width W of 7.5 mm. The total area of all ventilation sections a1 and a2 accounts for 58% of the area of the cross section a0 of the inner and outer heat exchange portions 321, 322 of the heat exchange device 320.
Table 2 below sets forth the heat dissipation results of the display device of the first embodiment compared with the display device including the heat exchange device of the third embodiment. As can be seen from table 2, the liquid crystal temperature and the light source temperature of the display device including the heat exchanging device of the third embodiment are higher than those of the display device of the first embodiment, respectively, in operation.
Fig. 9 is a schematic sectional view of a heat exchange device of a display device according to a fourth embodiment of the present invention. Since the fourth embodiment is similar to the first embodiment, only the differences will be described below.
In the present embodiment, the heat exchanging device 320b further includes a plurality of heat dissipating fins F1. The heat dissipating fins F1 are disposed in a portion of the internal heat dissipating air channel 3211 of the internal heat exchanging portion 321 and a portion of the external heat dissipating air channel 3221 of the external heat exchanging portion 322, respectively. Thereby, it is helpful to increase the heat dissipation surface area of the inner heat dissipation air duct 3211 and the outer heat dissipation air duct 3221.
Further, in the present embodiment, the total area of all the ventilation sections a1 and all the ventilation sections a2 accounts for 37% of the area of the cross section a0 of the inner heat exchange portion 321 and the outer heat exchange portion 322 of the heat exchange device 320 b.
Table 3 below sets forth the heat dissipation results of the display device of the first embodiment compared with the display device including the heat exchange device of the fourth embodiment. As can be seen from table 3, the liquid crystal temperature and the light source temperature of the display device including the heat exchanging device of the fourth embodiment are higher than those of the display device of the first embodiment, respectively, in operation.
Fig. 10 is an exploded view of a display device according to a fifth embodiment of the present invention. Fig. 11 is a cross-sectional view of the display device of fig. 10. Since the fifth embodiment is similar to the first embodiment, only the differences will be described below.
In the present embodiment, the display device 3 is a side-illuminated (Edge-LED) liquid crystal display. In detail, the display assembly 20 of the display device 3 includes a light source 222a for side illumination. The light source 222a is disposed adjacent to the internal heat exchange portion 321 of the heat exchange device 320.
In summary, in the display device and the heat exchange device disclosed in the present invention, the heat exchange device includes an internal heat exchange portion and an external heat exchange portion. The wind flow generator drives the high-temperature air flow in the frame body to the internal heat dissipation air duct at the internal heat exchange part. The external ambient air flow is located in the external heat dissipation air channel at the external heat exchange portion. Through the heat exchange between the internal heat dissipation air duct and the external heat dissipation air duct, the heat energy generated by the backlight module is transferred to the external environment through the heat exchange device, thereby being beneficial to reducing the temperature of the display device.
In addition, because the internal heat dissipation air duct is not communicated with the external heat dissipation air duct, the display device is favorable for preventing moisture and dust of the external environment from entering the display device through the air duct, and the display device is suitable for being placed outdoors.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (17)
1. A heat exchange device for an electronic device having a light source module, comprising:
an internal heat exchange portion for being adjacently attached to the light source module, the internal heat exchange portion having at least one internal heat dissipation air duct, the at least one internal heat dissipation air duct being communicated with an electronic device space of the electronic device, and the at least one internal heat dissipation air duct being configured to provide a high temperature air flow generated by the light source module to flow between the electronic device space and the at least one internal heat dissipation air duct; and
an external heat exchange part in heat conduction contact with the internal heat exchange part, the external heat exchange part having an external heat dissipation structure not communicated with the at least one internal heat dissipation air channel, and the external heat dissipation structure being used for providing an ambient air flow to circulate in the external heat dissipation structure.
2. The heat exchange device of claim 1, wherein the external heat dissipation structure has at least one external heat dissipation air channel, and the at least one external heat dissipation air channel is configured to provide the ambient air flow to circulate in the at least one external heat dissipation air channel.
3. The heat exchange device of claim 1, wherein the external heat sink structure is a plurality of fins, and the fins are configured to provide the flow of ambient air between the fins.
4. The heat exchange device of claim 2, wherein the internal heat exchange portion further has an inner side facing the light source module, the external heat exchange portion further has an outer side opposite to the inner side, and the at least one internal heat dissipation channel and the at least one external heat dissipation channel are disposed between the inner side and the outer side.
5. The heat exchange device according to claim 2, wherein the at least one inner heat dissipation air channel and the at least one outer heat dissipation air channel are arranged in a plurality of numbers.
6. The heat exchange device of claim 5, wherein the total ventilation cross-sectional area of the inner heat dissipating air channels and the outer heat dissipating air channels is 35% to 70% of the cross-sectional area of the inner heat exchange portion and the outer heat exchange portion.
7. The heat exchange device of claim 2, further comprising a plurality of heat fins disposed in at least one of the at least one inner heat dissipation air channel and the at least one outer heat dissipation air channel, respectively.
8. A display device, comprising:
a display assembly; and
a heat exchange device, comprising:
an internal heat exchange portion for being adjacently attached to the display assembly, the internal heat exchange portion having at least one internal heat dissipation air duct, the at least one internal heat dissipation air duct being communicated with a display assembly space of the display assembly, and the at least one internal heat dissipation air duct being configured to provide a high temperature air flow generated by the display assembly to flow between the display assembly space and the at least one internal heat dissipation air duct; and
an external heat exchange part in heat conduction contact with the internal heat exchange part, the external heat exchange part having an external heat dissipation structure not communicated with the at least one internal heat dissipation air channel, and the external heat dissipation structure being used for providing an ambient air flow to circulate in the external heat dissipation structure.
9. The display device according to claim 8, wherein the external heat dissipation structure has at least one external heat dissipation air channel for providing the ambient air flow to circulate in the at least one external heat dissipation air channel.
10. The display device according to claim 8, wherein the external heat sink structure is a plurality of fins for providing the ambient air flow to circulate between the fins.
11. The display device according to claim 9, wherein the internal heat exchange portion further has an inner side facing the display module, the external heat exchange portion further has an outer side opposite to the inner side, and the at least one internal heat dissipation channel and the at least one external heat dissipation channel are between the inner side and the outer side.
12. The display device according to claim 9, wherein the at least one inner heat dissipation air channel and the at least one outer heat dissipation air channel are arranged in a plurality of rows.
13. The display device according to claim 12, wherein a total ventilation cross-sectional area of the inner heat dissipating air channels and the outer heat dissipating air channels occupies 35% to 70% of a cross-sectional area of the inner heat exchanging portion and the outer heat exchanging portion.
14. The display device according to claim 9, further comprising a plurality of heat dissipation fins respectively disposed in at least one of the at least one internal heat dissipation air channel and the at least one external heat dissipation air channel.
15. The display device of claim 8, further comprising a frame and a first airflow generator disposed in the frame, wherein the frame comprises a display side frame portion and a back frame portion opposite to each other, the display assembly comprises a display unit and a backlight module, the display unit is exposed from the display side frame portion, the heat exchange device is disposed in the back frame portion, the backlight module is adjacently attached to the internal heat exchange portion of the heat exchange device and in thermal contact with the internal heat exchange portion, and the first airflow generator corresponds to the at least one internal heat dissipation ventilation duct.
16. The display device of claim 8, wherein the display assembly comprises a display unit, a backlight module and a cavity between the display unit and the backlight module, the cavity having the display assembly space.
17. The display device according to claim 15, further comprising a cover disposed on the frame and a second airflow generator disposed on the cover, wherein the second airflow generator corresponds to the external heat sink.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810724400.5A CN110687717B (en) | 2018-07-04 | 2018-07-04 | Heat exchange device and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810724400.5A CN110687717B (en) | 2018-07-04 | 2018-07-04 | Heat exchange device and display device |
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| CN110687717A true CN110687717A (en) | 2020-01-14 |
| CN110687717B CN110687717B (en) | 2022-05-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022193581A1 (en) * | 2021-03-18 | 2022-09-22 | Dynascan Technology Corp. | Display having an evaporator |
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| JP2000019529A (en) * | 1998-06-30 | 2000-01-21 | Optrex Corp | Liquid crystal display device |
| CN1808231A (en) * | 2005-01-19 | 2006-07-26 | 财团法人工业技术研究院 | Heat radiation design of backlight module |
| CN201166759Y (en) * | 2008-01-23 | 2008-12-17 | 奇信电子股份有限公司 | Flat display device with radiating module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000019529A (en) * | 1998-06-30 | 2000-01-21 | Optrex Corp | Liquid crystal display device |
| CN1808231A (en) * | 2005-01-19 | 2006-07-26 | 财团法人工业技术研究院 | Heat radiation design of backlight module |
| CN201166759Y (en) * | 2008-01-23 | 2008-12-17 | 奇信电子股份有限公司 | Flat display device with radiating module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022193581A1 (en) * | 2021-03-18 | 2022-09-22 | Dynascan Technology Corp. | Display having an evaporator |
| US11622480B2 (en) | 2021-03-18 | 2023-04-04 | Dynascan Technology Corp. | Display having an evaporator |
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| Publication number | Publication date |
|---|---|
| CN110687717B (en) | 2022-05-10 |
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