Display device

Abstract

To achieve a display device which enhances radiation performance and enhances vibration resistance.SOLUTION: A display device 1 comprises a light source, a tabular display 132, a heat radiation part 134, a backlight housing 131 which stores the display 132 and the heat radiation part 134, a resin spring 136 which is provided in the backlight housing 131 and fixes the display 132 and the heat radiation part 134 by sandwiching from a surface extension direction intersecting to a plate thickness direction, a backlight cover 137 and a buffer member 138 which restrict the display 132 and the heat radiation part 134 from displacing by pressurizing the display 132 and the heat radiation part 134 in the plate thickness direction all together.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a display device. [Background technology]

[0002] Conventionally, there has been known a display device that projects display light emitted from a light source onto a transparent member such as a vehicle windshield (see, for example, Patent Document 1). The display device described in Patent Document 1 includes a backlight unit consisting of a light source and a plurality of lenses, and a plate-shaped liquid crystal display element (display section) having a display area where the light emitted from the light source is condensed. The liquid crystal display element is protected by a frame-shaped cover with its display area exposed, and is fixed to a box-shaped housing section by hooks formed on the cover. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-189626 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned display devices, the temperature of the liquid crystal display element can rise due to the effects of conductive heat generated by the application of voltage at startup and the heat generated by the display light (and also the heat generated by the collected light, in the case of a head-up display (HUD) mounted on a vehicle, etc.). This can lead to the risk of the liquid crystal display element expanding or breaking. To address this issue, a possible solution is to sandwich a glass plate or the like between the liquid crystal display element and the housing, allowing the glass plate to dissipate the conductive heat. However, when the display device is used in a vehicle, etc., the housing for the liquid crystal display element vibrates, causing the glass plate and the liquid crystal display element to vibrate in the direction of their surface extension and thickness, resulting in the generation of abnormal noise. Furthermore, the vibrations make it difficult for the glass plate and the liquid crystal display element to be in constant contact with each other, potentially reducing the heat dissipation efficiency of the glass plate.

[0005] An object of the present invention is to provide a display device with improved heat dissipation performance and improved vibration resistance. [Means for solving the problem]

[0006] In order to solve the problems and achieve the objects, the display device includes a light source, a plate-shaped display unit having a display area where light emitted from the light source is collected, a plate-shaped heat dissipation unit arranged on one or the other side of the display unit in a plate thickness direction, a housing that accommodates the display unit and the heat dissipation unit, a first fixing unit that is provided on the housing and that sandwiches and fixes the display unit and the heat dissipation unit in a surface extending direction that intersects with the plate thickness direction, and a second fixing unit that presses the display unit and the heat dissipation unit together in the plate thickness direction, thereby restricting displacement of the display unit and the heat dissipation unit. The second fixing portion includes a cushioning member extending along the periphery of the display area, the second fixing portion holds the cushioning member, and includes a cover member that covers the periphery of the display portion and the heat dissipation portion and fits into the housing, the housing has an opening that opens toward one side in the optical axis direction of the light emitted from the light source, the display portion and the heat dissipation portion are arranged near the opening, the first fixing portion is arranged on the periphery of the display portion, and when the cover member is fitted into the housing, the cushioning member abuts against either the display portion or the heat dissipation portion. It is characterized by: [Effects of the Invention]

[0007] According to the present invention, it is possible to obtain a display device having improved heat dissipation performance and improved vibration resistance. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic diagram illustrating an overall state in which a display device according to an embodiment of the present invention is disposed inside a vehicle. [Figure 2] 1 is an overall schematic diagram showing the configuration of a display device. [Figure 3] FIG. 1 is a perspective view of a backlight device that constitutes a part of a display device. [Figure 4] A cross-sectional view taken along line A-A in Figure 3. [Figure 5] FIG. 2 is a perspective view of the backlight device with the backlight cover removed. [Figure 6] FIG. 10(A) is a diagram showing the arrangement of the buffer members, and FIG. 10(B) is a diagram showing the arrangement of the buffer members in a modified example. [Figure 7] FIG. 10 is an exploded perspective view of a backlight device according to a modified example. [Figure 8]1A is a side view of the display unit, the diffusion plate, and the heat dissipation unit, FIG. 1B is a perspective view of the diffusion plate, and FIG. 1C is a diagram showing the halftone dots on the diffusion plate. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the present invention will be described below with reference to Fig. 1 to Fig. 6(A). The display device 1 is a HUD unit (head-up display unit) mounted on a vehicle or the like. As shown in Fig. 1, the display device 1 is disposed inside an instrument panel P at the front of the vehicle.

[0010] The display device 1 irradiates the windshield Wa with display light L through an outlet P1 opened in the instrument panel P, and generates a predetermined display image by a distant display using a virtual image L1. The display image using the virtual image L1 indicates various information such as speed and distance traveled, and the occupant while driving visually confirms this information by looking forward from eye point Ep, which indicates the position of the eyes. In other words, the occupant simultaneously views the display image generated by the display device 1 and the scenery ahead of the vehicle as seen through the windshield Wa, superimposed on each other.

[0011] In the drawings, arrows X, Y, and Z are directions perpendicular to one another. In this embodiment, the front-to-rear direction of the vehicle is indicated by arrow X and is referred to as the "front-to-rear direction X." The front side of the front-to-rear direction X is referred to as the "front side X1," and the rear side is referred to as the "rear side X2." The width direction of the vehicle is indicated by arrow Y and is referred to as the "width direction Y." The height direction of the vehicle is indicated by arrow Z and is referred to as the "vertical direction Z." The upper side of the vertical direction Z is referred to as the "upper side Z1," and the lower side is referred to as the "lower side Z2." The thickness direction of the display unit 132, which will be described later, may be referred to as the thickness direction or the buffer member pressing direction c. The direction intersecting the thickness direction may be referred to as the surface extension direction or the display unit angle direction d. This is merely for convenience of explanation and does not limit the directions at the time of manufacturing the display device 1 or the directions in the actual use state of the display device 1.

[0012] As shown in FIG. 2, the display device 1 includes a housing 11, a mirror component 12, a backlight device 13, and a control board .

[0013] The housing 11 is disposed inside the instrument panel P and houses various components of the display device 1. An opening 11a communicating with the injection port P1 of the instrument panel P is formed in the upper part of the housing 11.

[0014] The mirror component 12 includes a flat mirror 121 disposed on the upper side Z1 of the backlight device 13, and a concave mirror 122 disposed on the front side X1 of the backlight device 13 facing the flat mirror 121. The flat mirror 121 is a reflective member that first reflects the display light L emitted from the backlight device 13, and reflects the display light L diagonally downward. The concave mirror 122 is a reflective member that reflects the display light L reflected from the flat mirror 121, and reflects the display light L toward the upper side Z1 (windshield Wa side).

[0015] As shown in Figures 3 and 4, the backlight device 13 includes a backlight housing 131 (housing), a light source (not shown), a display unit 132, an optical lens 133, a heat dissipation unit 134, a resin spring 136 (first fixing unit), a backlight cover 137 (cover member), and a buffer member 138.

[0016] The backlight housing 131 is a housing member that houses the display unit 132, the heat dissipation unit 134, etc., and is formed in a box shape as shown in Fig. 3. The backlight housing 131 is made of a resin member that has heat dissipation properties.

[0017] 5, a plate-shaped mounting base 131a is formed inside the end of the upper side Z1 of the backlight housing 131. The mounting base 131a is a portion on which the display unit 132 and the heat dissipation unit 134 are mounted within the backlight housing 131. A first opening 131b (opening) and a second opening 131c are formed to penetrate the mounting base 131a in the plate thickness direction.

[0018] The first opening 131b is formed in the center of the mounting base 131a. The shape and size of the first opening 131b are substantially the same as the shape and size of a display area 132a of the display unit 132, which will be described later. In this manner, the backlight housing 131 is formed with the first opening 131b that opens toward the upper side Z1. The upper side Z1 is one side in the optical axis direction of the light emitted by the light source. In other words, the backlight housing 131 opens toward one side in the optical axis direction of the light emitted by the light source.

[0019] The second openings 131c are openings for arranging the resin springs 136, and are provided on the front side X1 and rear side X2 of the first opening 131b, respectively, and extend in the width direction Y, as shown in FIG.

[0020] The light source is, for example, an LED (Light Emitting Diode). The light source is mounted on a printed circuit board (not shown) attached to the bottom surface of the backlight housing 131, faces the upper side Z1, and emits light in the same direction.

[0021] As shown in FIG. 4, the display unit 132 is a rectangular liquid crystal panel disposed near the first opening 131b at the top of the backlight housing 131. In this embodiment, the display unit 132 is formed as a rectangular plate having a larger area than the first opening 131b and disposed above the first opening 131b (Z1). The display unit 132 is fixed to the backlight housing 131 while being sandwiched in the front-rear direction X by resin springs 136 serving as first fixing members. As shown in FIG. 4, the display unit 132 is inclined in the display unit angle direction d so as to be positioned slightly lower Z2 as it approaches the front side X1. A display area 132a that collects light emitted from a light source is provided in the center of the display unit 132. The display area 132a converts the light from the light source that passes through it into display light L that represents a display image, and is formed to have substantially the same shape and size as the first opening 131b.

[0022] The optical lens 133 is a component that focuses light emitted from the light source toward the display area 132a. Two optical lenses 133 are provided between the light source and the display unit 132, and are arranged overlapping in the vertical direction Z as shown in FIG.

[0023] The heat dissipation unit 134 is a portion that dissipates heat generated within the backlight housing 131. The heat dissipation unit 134 is made of a rectangular plate of glass having an area larger than the area of ​​the first opening 131b, and is disposed on the lower side Z2 of the display unit 132, as shown in FIG. 4 . Specifically, the heat dissipation unit 134 is placed on the mounting base 131a of the backlight housing 131 on the lower side Z2 of the display unit 132. In this manner, the heat dissipation unit 134 is disposed near the first opening 131b of the backlight housing 131. Here, the display unit 132 in particular may generate heat due to conduction heat caused by application of voltage at the start of the display device 1, concentrated heat when light from the light source is concentrated on the display unit 132, or concentrated heat of external light that enters the backlight housing 131 through the outlet P1, and the like, which may cause a rise in temperature. However, the heat dissipation by the heat dissipation unit 134 suppresses a rise in temperature of the display unit 132.

[0024] In this embodiment, the heat dissipation unit 134 is disposed on the lower side Z2 of the display unit 132, but the heat dissipation unit 134 may also be disposed on the upper side Z1 of the display unit 132. That is, the heat dissipation unit 134 can be disposed on one side or the other side in the plate thickness direction of the display unit 132. Furthermore, the heat dissipation unit 134 does not necessarily have to be plate glass, and can be formed using various materials as long as it is a transparent material or a transparent material with heat dissipation properties.

[0025] The resin springs 136 are fixing members that fix the display unit 132 to the backlight housing 131. As shown in FIG. 5, the resin springs 136 are arranged in the second openings 131c of the backlight housing 131. Specifically, a pair of resin springs 136 are provided in the second openings 131c on the front side X1 and the second openings 131c on the rear side X2, and the two pairs are lined up in the width direction Y of the backlight housing 131. As shown in FIG. 5, the resin springs 136 include a spring portion 1361 that curves inward of the backlight housing 131 and a resin pressing portion 1362 provided at the tip of the spring portion 1361.

[0026] The spring portion 1361 is a leaf spring that is elastically deformable in the front-rear direction X, and is provided so as to abut against the peripheral edges of the display unit 132 and the heat dissipation unit 134. Specifically, the spring portion 1361 on the front side X1 curves inward from the inner wall of the front side X1 of the backlight housing 131 and abuts against the edges of the front side X1 of the display unit 132 and the heat dissipation unit 134. The spring portion 1361 on the rear side X2 curves inward from the inner wall of the rear side X2 of the backlight housing 131 and abuts against the edges of the rear side X2 of the display unit 132 and the heat dissipation unit 134.

[0027] The resin pressing portion 1362 is a portion that presses the display unit 132, which is sandwiched in the front-to-rear direction X, toward the inside of the backlight housing 131, and as shown in FIGS. 4 and 5, is provided at the tip of the spring portion 1361 and is formed in a claw shape so as to catch on the edge of the display unit 132. In other words, the resin pressing portion 1362 is disposed on the periphery of the display unit 132. The display unit 132 and the heat dissipation portion 134 are sandwiched and fixed in place by the resin spring 136 configured in this manner from the display unit angle direction d (i.e., the surface extension direction of the display unit 132).

[0028] The backlight cover 137 is a metal cover member that covers the periphery of the display unit 132 and the heat dissipation unit 134 and fits into the backlight housing 131, and together with the buffer member 138, constitutes a second fixing portion. As shown in FIGS. 3 and 4 , the backlight cover 137 fits into the backlight housing 131 so as to cover the open end of the upper side Z1 of the backlight housing 131. A first opening 137a that opens in the plate thickness direction is formed in the center of the backlight cover 137. The position where the first opening 137a is formed corresponds to the position of the display area 132a of the display unit 132 and the position of the resin spring 136 on the front side X1. As a result, when the backlight cover 137 is fitted into the backlight housing 131, the upper side Z1 surface of the display area 132a and the resin spring 136 on the front side X1 are exposed to the space within the housing 11.

[0029] Second openings 137b that open in the plate thickness direction are formed around the first opening 137a. The positions at which the second openings 137b are formed correspond to the positions of the resin springs 136 on the rear side X2. That is, the second openings 137b are formed in two locations in accordance with the resin springs 136 on the rear side X2. As a result, when the backlight cover 137 is fitted into the backlight housing 131, the resin springs 136 on the rear side X2 are exposed to the space within the housing 11.

[0030] 6(A), a cushioning member 138 is attached to the surface of the lower side Z2 of the backlight cover 137. That is, the backlight cover 137 holds the cushioning member 138.

[0031] The cushioning member 138 is a member that presses the display unit 132 and the heat dissipation unit 134 together in the cushioning member pressing direction c. The cushioning member 138, together with the backlight cover 137, constitutes a second fixing portion. The cushioning member 138 can be made of, for example, elastic packing. The cushioning member 138 may also be made of a thermal sheet or the like that has excellent heat dissipation properties, thereby adding a heat dissipation function to the cushioning member 138 for dissipating heat generated in the display unit 132. As shown in FIG. 6(A), the cushioning member 138 extends in the width direction Y of the backlight housing 131 along the edge of the front side X1 of the display area 132a of the display unit 132. The cushioning member 138 also extends in the width direction Y of the backlight housing 131 along the edge of the rear side X2 of the display area 132a. In other words, the cushioning member 138 extends along the periphery of the display area 132a of the display unit 132.

[0032] 4, when the backlight cover 137 is fitted into the backlight housing 131, the buffer member 138 abuts against the plate surface of the upper side Z1 of the display unit 132 and presses the display unit 132 and the heat dissipation unit 134 together in the buffer member pressing direction c (plate thickness direction). As a result, the display unit 132 and the heat dissipation unit 134 are pressed against the mounting base 131a and fixed. That is, the backlight cover 137 and the buffer member 138 serving as the second fixing member press the display unit 132 and the heat dissipation unit 134 together in the buffer member pressing direction c, thereby restricting displacement of the display unit 132 and the heat dissipation unit 134. At this time, if the buffer member 138 has a heat dissipation function, the buffer member 138 dissipates heat generated in the display unit 132 to the outside of the backlight housing 131 via the display unit 132 with which it abuts.

[0033] The control board 14 is a board that controls the display device 1, and is disposed inside the display device 1 (for example, in the present embodiment, inside the housing 11 as shown in FIG. 2). The control board 14 controls the lighting pattern of the light source, the operation of the display area 132a described above, and the like.

[0034] In this embodiment, the heat dissipation unit 134 is disposed on the lower side Z2 of the display unit 132, and therefore the cushioning member 138 comes into contact with the display unit 132. However, as described above, the heat dissipation unit 134 may be disposed on the upper side Z1 of the display unit 132. In this case, when the backlight cover 137 is fitted into the backlight housing 131, the cushioning member 138 comes into contact with the plate surface on the upper side Z1 of the heat dissipation unit 134 and presses the heat dissipation unit 134 and the display unit 132 together in the cushioning member pressing direction c (plate thickness direction). If the cushioning member 138 has a heat dissipation function, heat generated in the display unit 132 is dissipated to the outside of the backlight housing 131 via the heat dissipation unit 134 with which it is in contact.

[0035] According to this embodiment, the display unit 132 and the heat dissipation unit 134 can be sandwiched and fixed in the display unit angle direction d (plane extension direction) by the resin spring 136 (first fixing portion). In addition, the backlight cover 137 and the buffer member 138 (second fixing portion) press the display unit 132 and the heat dissipation unit 134 in the buffer member pressing direction c (plate thickness direction), thereby restricting displacement of the display unit 132 and the heat dissipation unit 134. That is, the display unit 132 and the heat dissipation unit 134 can be fixed from at least two directions by fixing members with different fixing structures. Therefore, the structure around the display unit 132 is less likely to be displaced. Even if the backlight housing 131 vibrates, vibration of the display unit 132 and the heat dissipation unit 134 can be suppressed, preventing the generation of abnormal noise. Furthermore, since it is possible to prevent the display unit 132 and the heat dissipation unit 134 from constantly coming into contact with each other due to vibration, the heat dissipation efficiency of the heat dissipation unit 134 can be stably maintained. Furthermore, this configuration makes it easy to ensure the thickness of the heat dissipation section 134, thereby improving the heat dissipation performance of the heat dissipation section 134. Therefore, it is possible to obtain a display device with improved heat dissipation performance and improved earthquake resistance.

[0036] Furthermore, according to the above-described embodiment, the buffer member 138 constituting the second fixing portion can also be configured to have a heat dissipation function. As a result, in addition to the heat dissipation portion 134 (heat dissipation portion) arranged on one or the other side in the plate thickness direction of the display unit 132, the backlight cover 137 and the buffer member 138 (second fixing portion) can also dissipate heat generated in the display unit 132. As a result, a rise in temperature of the display unit 132 can be suppressed, and expansion or damage to the display unit 132 can be avoided.

[0037] Furthermore, because the backlight cover 137 and the buffer member 138 can also dissipate heat from within the backlight housing 131, there is no need to increase the thickness of the heat dissipation section 134 for heat dissipation, compared to a configuration without the backlight cover 137 and the buffer member 138 or a configuration in which the buffer member 138 does not have a heat dissipation function. This makes it possible to prevent the display device 1 from becoming larger in size and to prevent the manufacturing costs of the display device 1 from increasing.

[0038] Furthermore, the heat dissipation section 134 is made of a transparent material or a transparent material with heat dissipation properties (plate glass in this embodiment). This allows the heat dissipation section 134 to be arranged in a stacked manner over the entire display section 132, as it does not block the light emitted from the light source. This further improves the heat dissipation properties of the display device 1.

[0039] Furthermore, in this embodiment, the first fixing portion can be configured with a simple structure in which a pair of resin springs 136, i.e., a pair of leaf springs, is arranged in the backlight housing 131, which makes it easier to manufacture the display device 1.

[0040] In this embodiment, the backlight cover 137 (cover member) holds the buffer member 138. Therefore, by fitting the backlight cover 137 into the backlight housing 131, the buffer member 138 can be brought into contact with either the display unit 132 or the heat dissipation unit 134, and heat can be dissipated from this contact portion.

[0041] While one embodiment of the present invention has been described above in detail with reference to the drawings, the specific structure is not limited to these embodiments, and design changes and the like that do not depart from the gist of the present invention are also included in the present invention. Fig. 6(B) is a diagram showing the arrangement of the buffer members 138 in a modified example. In this modified example, the buffer members 138 are arranged along the edges of the display area 132a on one side in the width direction Y as well as the edges of the display area 132a on the other side in the width direction Y in addition to the edges of the front side X1 and the rear side X2 of the display area 132a of the display unit 132.

[0042] According to this configuration, the entire periphery of the display area 132a can be surrounded by the buffer member 138, so that the heat dissipation performance and vibration resistance of the display device 1 can be further improved.

[0043] Furthermore, according to the above-described embodiment, the resin spring 136 (first fixing portion), the backlight cover 137, and the buffer member 138 (second fixing portion) restrict displacement of the display unit 132 and the heat dissipation unit 134. However, the fixing structure of the display unit 132 and the heat dissipation unit 134 is not limited to this. For example, as shown in FIG. 7, at least one pair (two pairs in FIG. 7) of fixing ribs 131d (third fixing portion) protruding inward in the width direction Y may be provided on the inner circumferential surface of the backlight housing 131, and the display unit 132 and the heat dissipation unit 134 may be press-fitted between this pair of fixing ribs 131d. That is, the inner circumferential surface of the backlight housing 131 may be provided with fixing ribs 131d protruding inward in a direction different from the direction in which the resin spring 136 sandwiches the display unit 132 and the heat dissipation unit 134 in the surface extension direction, and this may serve as the third fixing portion.

[0044] With this configuration, in addition to the fixation by the resin spring 136 (first fixing portion), the backlight cover 137, and the buffer member 138 (second fixing portion), press-fit fixation to the fixing rib 131d (third fixing portion) can be used as a fixing means for the display unit 132 and the heat dissipation unit 134. This further reduces vibrations of the display unit 132 and the heat dissipation unit 134 in the surface extension direction and plate thickness direction, and prevents the generation of abnormal noise and the like.

[0045] In the above-described embodiment, the display unit 132 and the heat dissipation unit 134 are disposed so as to directly overlap each other in the vertical direction Z. However, the display unit 132 and the heat dissipation unit 134 do not necessarily need to directly overlap each other. FIG. 7 is an exploded perspective view of a backlight device 13 according to a modified example. In this modified example, a diffusion plate 139 is disposed between the display unit 132 and the heat dissipation unit 134. As shown in FIG. 8(B), the diffusion plate 139 is formed in the shape of a thin plate sheet, and its plate surface has recesses and protrusions. With this configuration, a thin air layer is formed between the display unit 132 and the heat dissipation unit 134 due to air accumulating between the recesses and protrusions of the diffusion plate 139 and in the recesses.

[0046] Generally, the contact surfaces of the display unit 132 and the heat dissipation unit 134 are smooth, which can cause adhesion between the contacting surfaces and generate interference fringes. Depending on the degree of interference fringes, this can lead to poor display of the HUD unit. However, according to this modification, the uneven diffuser plate 139 can form an air layer between the display unit 132 and the heat dissipation unit 134. This air layer can suppress contact between the display unit 132 and the heat dissipation unit 134 and prevent the occurrence of interference fringes. Even with the diffuser plate 139 positioned in this manner, the air layer created by the unevenness of the diffuser plate 139 is thin. Therefore, the resin spring 136, backlight cover 137, buffer member 138, and fixing rib 131d described above can stably maintain the fixed state of the display unit 132 and the heat dissipation unit 134. This allows for the display device 1 to be obtained, avoiding interference fringes and improving heat dissipation performance and vibration resistance. 8(C), the unevenness may be provided on the diffusion plate 139 by forming minute dots 139a on the diffusion plate 139. With this configuration, a thin air layer can be formed between the display unit 132 and the heat dissipation unit 134 by the air that accumulates between the dots 139a. [Explanation of symbols]

[0047] c. Pushing direction of buffer material (thickness direction) d Display angle direction (surface extension direction) 131 Backlight housing (housing) 132 Display section 132a Display area 134 Heat radiation part 136 Resin spring (first fixed part) 137 Backlight cover (cover material) 138 Cushioning member (second fixed part)

Claims

1. A light source and a plate-shaped display unit having a display area where light emitted from the light source is collected; a plate-shaped heat dissipation part disposed on one side or the other side of the display part in a plate thickness direction; a housing that accommodates the display unit and the heat dissipation unit; a first fixing portion provided in the housing, the first fixing portion sandwiching and fixing the display portion and the heat dissipation portion in a surface extending direction intersecting the plate thickness direction; a second fixing portion that restricts displacement of the display portion and the heat dissipation portion by pressing the display portion and the heat dissipation portion together in the plate thickness direction, the second fixing portion includes a buffer member extending along a periphery of the display area, the second fixing portion includes a cover member that holds the buffer member, covers peripheries of the display portion and the heat dissipation portion, and is fitted into the housing; the housing has an opening that opens toward one side in the optical axis direction of the light emitted by the light source, the display unit and the heat dissipation unit are disposed near the opening, the first fixing portion is disposed on a periphery of the display portion, The display device, characterized in that, when the cover member is fitted to the housing, the buffer member abuts against either the display unit or the heat dissipation unit.

2. a third fixing portion is provided on the housing at a position where the third fixing portion sandwiches the display unit and the heat dissipation unit in a direction different from a direction where the first fixing portion sandwiches the display unit and the heat dissipation unit in the surface extending direction; 2. The display device according to claim 1, wherein the display unit and the heat dissipation unit are fixed to the third fixing portion by press-fitting.

3. 2. The display device according to claim 1, wherein an uneven diffusion plate is disposed between the display section and the heat dissipation section, thereby forming an air layer.

4. 2. The display device according to claim 1, wherein the heat dissipation portion is a transparent member or a transparent member having heat dissipation properties.

5. The display device according to claim 1 , wherein the first fixing portion is a pair of leaf springs arranged on the periphery of the display portion and facing each other.

Images