Display device

Abstract

The present invention discloses a display device, comprising a frame, a light guide plate, a reflective sheet, a first colloid and a second colloid. The light guide plate is located on the frame. The reflective sheet is located between the light guide plate and the frame. The first colloid is located on a first surface of the reflective sheet adjacent to the light guide plate. The first colloid comprises a plurality of first colloid units. The plurality of first colloid units are arranged along a first direction and are separated from each other. Two ends of the first colloid have a first distance. The second colloid is located on a second surface of the reflective sheet adjacent to the frame and does not overlap the first colloid. The second colloid extends along the first direction. Two ends of the second colloid have a second distance, and the first distance is greater than the second distance.

Description

Technical Field

[0001] The present disclosure relates to a display device. Background Art

[0002] In order to enhance the viewing experience of display devices in different environments and extend their service life, the industry has made structural adaptations to display devices in various usage scenarios. For example, when a display device is used in a mobile vehicle, the display device must overcome the vibrations and heat generated by the vehicle's operation. However, when multiple components with different thermal expansion coefficients are fixed to each other, each component will be subjected to uneven expansion stress as the temperature changes, causing the components to pull against each other, shortening the service life of the display device.

[0003] Therefore, how to provide a display device that can solve the above problems is one of the problems that the industry is eager to invest research and development resources to solve. Summary of the invention

[0004] In view of this, one aspect of the present disclosure is to provide a display device that can effectively solve the above problems.

[0005] Some embodiments of the present disclosure are related to a display device including a frame, a light guide plate, a reflective sheet, a first colloid and a second colloid. The light guide plate is located on the frame. The reflective sheet is located between the light guide plate and the frame. The first colloid is located on a first surface of the reflective sheet adjacent to the light guide plate. The first colloid includes a plurality of first colloid units. The plurality of first colloid units are arranged along a first direction and separated from each other. Two ends of the first colloid have a first distance. The second colloid is located on a second surface of the reflective sheet adjacent to the frame and does not overlap the first colloid. The second colloid extends along the first direction. Two ends of the second colloid have a second distance, and the first distance is greater than the second distance.

[0006] In some embodiments, the second colloid is a continuous colloid extending along the first direction.

[0007] In some embodiments, the display device further comprises a plurality of light emitting elements. The plurality of light emitting elements are located on the side wall of the frame. The plurality of light emitting elements are arranged separately from each other along a first direction and face the light incident surface of the light guide plate.

[0008] In some embodiments, the first colloid is closer to the plurality of light-emitting elements than the second colloid.

[0009] In some embodiments, a plurality of gaps are spaced between the plurality of first colloid units, and a plurality of light emitting elements respectively face the plurality of gaps between the plurality of first colloid units.

[0010] In some embodiments, a gap width between two adjacent ones of the plurality of first colloid units is greater than an element width of the plurality of light-emitting elements.

[0011] In some embodiments, the plurality of light emitting elements face the plurality of first colloid units respectively.

[0012] In some embodiments, in the first direction, a distance between a center position of the first colloid and a center position of the second colloid is no greater than about 1 mm.

[0013] In some embodiments, the second colloid comprises a plurality of second colloid units. The plurality of second colloid units are arranged along a first direction and separated from each other. In a unit distance extending along the first direction, the number of gaps between the first colloid units is greater than the number of gaps between the second colloid units.

[0014] In some embodiments, the first colloid has a first coverage area, and the second colloid has a second coverage area, and a ratio of the first coverage area to the second coverage area ranges from about 0.85 to about 1.15.

[0015] In summary, in the display device of some embodiments of the present disclosure, the light guide plate, the reflective sheet and the frame are fixed to each other in the Z direction by the first colloid and the second colloid. The first colloid and the second colloid do not overlap in the Z direction and the first colloid has a plurality of first colloid units arranged separately from each other in the X direction, which can evenly distribute the stress on the first surface and the second surface of the reflective sheet to prevent the reflective sheet from being distorted when the display device is heated and maintain the visual taste of the display device. On the other hand, the first colloid is closer to the plurality of light-emitting elements than the second colloid, which helps to maintain the uniformity of the display device. In addition, the plurality of light-emitting elements face the gaps between the plurality of first colloid units, which can maintain the luminous efficiency of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The aspects of the present disclosure are best understood from the following detailed description when read in conjunction with the accompanying drawings. It should be noted that, in accordance with standard practice in the industry, various features are not drawn to scale. In fact, the dimensions of various features may be arbitrarily increased or reduced for clarity of discussion.

[0017] Figure 1A FIG. 4 is a top view of a display device according to some embodiments of the present disclosure.

[0018] Figure 1B Based on Figure 1A The cross-sectional side view of the display device is shown along the cross-sectional indicator line 1B- 1B′.

[0019] Figure 1C Based on Figure 1B The indicator line 1C-1C' in FIG. 1 is a top view of the cross-sectional view of the display device.

[0020] Figure 1D Based on Figure 1CFrame 1D shows a partially enlarged view of one embodiment of a display device.

[0021] Figure 2 Based on Figure 1C Frame 1D shows a partially enlarged view of another embodiment of a display device.

[0022] Figure 3 Based on Figure 1C Frame 1D shows a partially enlarged view of another embodiment of a display device.

[0023] Wherein, the reference numerals are:

[0024] 100: Display device

[0025] 110:Frame

[0026] 112: Side wall

[0027] 120: Light guide plate

[0028] 122: Light-entering surface

[0029] 130:Reflective sheet

[0030] 132: First surface

[0031] 134: Second surface

[0032] 140: First colloid

[0033] 142: First colloid unit

[0034] 144: Gap

[0035] 150,150': Second colloid

[0036] 152: Second colloid unit

[0037] 154: Gap

[0038] 160: Light emitting element

[0039] 170: Optical film

[0040] AR1: First coverage area

[0041] AR2: Second coverage area

[0042] L1: First distance

[0043] L2: Second distance

[0044] L3: Unit distance

[0045] T1,T2: Length

[0046] W1,W2: Width

[0047] X,Y,Z: Direction

[0048] 1B-1B',1C-1C':Line

[0049] 1D: Box

[0050] θ: Lighting angle DETAILED DESCRIPTION

[0051] The following disclosure provides many different embodiments or examples for implementing the different features of the provided subject matter. The following describes specific examples of components and arrangements to simplify the disclosure. Of course, these are only examples and are not intended to be restrictive. For example, in the following description, a first feature is formed on or on a second feature, which may include an embodiment in which the first feature and the second feature are formed as direct contact, and may also include an embodiment in which an additional feature may be formed between the first feature and the second feature so that the first feature and the second feature may not be in direct contact. In addition, the disclosure may repeat element symbols and / or letters in various examples. This repetition is for simplification and clarity purposes, and does not itself represent the relationship between the various embodiments and / or configurations discussed.

[0052] Additionally, for simplicity of description, spatially relative terms such as "below," "beneath," "lower," "above," "upper," and the like may be used herein to describe the relationship of one element or feature to another (additional) element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the elements in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein should likewise be interpreted accordingly.

[0053] As used herein, "approximately", "about", "approximately" or "substantially" generally means falling within 20%, or within 10%, or within 5% of a given value or range. The numerical values ​​given herein are approximate values, indicating that the use of terms such as "approximately", "about", "approximately" or "substantially" can be inferred when not explicitly stated.

[0054] Figure 1A FIG. 1 is a top view of a display device 100 according to some embodiments of the present disclosure. Figure 1B Based on Figure 1A The cross-sectional side view of the display device 100 is shown along the cross-sectional indicator line 1B-1B'. Figure 1BSome embodiments of the present disclosure are related to a display device 100. The display device 100 includes a frame 110, a second colloid 150, a reflective sheet 130, a first colloid 140, and a light guide plate 120 stacked in sequence in the Z direction. The Z direction is substantially perpendicular to the surface of the light guide plate 120 and parallel to the direction in which the user views the display device 100. In some embodiments, in the Z direction, the thickness of the light guide plate 120 is in the range of about 2 mm to about 2.5 mm. In some embodiments, in the Z direction, the thickness of the first colloid 140 is in the range of about 0.05 mm to about 0.1 mm. In some embodiments, in the Z direction, the thickness of the reflective sheet 130 is in the range of about 0.188 mm to about 0.256 mm. In some embodiments, in the Z direction, the thickness of the second colloid 150 is in the range of about 0.05 mm to about 0.1 mm. In some embodiments, in the Z direction, the thickness of the first colloid 140 and the second colloid 150 are respectively about equal to about 1 / 3 times the thickness of the reflective sheet 130. In some embodiments, the display device 100 further includes an optical film layer 170 having a plurality of sub-film layers. The optical film layer 170 is disposed above the light guide plate 120 in the Z direction. In some embodiments, in the Z direction, the thickness of the optical film layer 170 is in a range of about 0.12 mm to about 0.38 mm. The first colloid 140 is located on the first surface 132 of the reflective sheet 130 adjacent to the light guide plate 120, and is used to fix the light guide plate 120 and the reflective sheet 130. The second colloid 150 is located on the second surface 134 of the reflective sheet 130 adjacent to the frame 110 and does not overlap with the first colloid 140 in the Z direction, and is used to fix the reflective sheet 130 and the frame 110. In this way, the relative positions among the light guide plate 120, the reflective sheet 130 and the frame 110 can be maintained by the first colloid 140 and the second colloid 150.

[0055] Please continue to refer to Figure 1B . The first colloid 140 and the second colloid 150 do not overlap in the Z direction, and can disperse the stress applied to the first surface 132 and the second surface 134 of the reflector 130. Specifically, due to the difference in material properties, the light guide plate 120 and the frame 110 have different thermal expansion coefficients. Therefore, when the display device 100 is heated, the light guide plate 120 and the frame 110 expand due to the heat, and the first surface 132 and the second surface 134 of the reflector 130 will be subjected to stresses of different magnitudes. If the first colloid 140 and the second colloid 150 overlap in the Z direction, the reflector 130 will be distorted due to the difference in stresses on the first surface 132 and the second surface 134, and the visual taste of the display device 100 will be affected. In some embodiments, in the Y direction substantially perpendicular to the Z direction, the first colloid 140 has a length T1, and the second colloid 150 has a length T2. In some embodiments, the first length T1 is not greater than the second length T2 to best maintain the flatness of the reflector 130.

[0056] Please refer to Figure 1C . Figure 1C Based on Figure 1B The top view of the display device 100 is shown by the indicator line 1C-1C' in FIG. It should be noted that the second colloid 150 is located below the reflector 130 and is therefore shown in dashed lines. The first colloid 140 includes a plurality of first colloid units 142. The plurality of first colloid units 142 are arranged along the X direction and separated from each other, and the X direction is substantially perpendicular to the Y direction and the Z direction. The plurality of first colloid units 142 separated from each other can disperse the stress applied to the first surface 132 and the second surface 134 of the reflector 130. Please refer to Figure 1B Since the thermal expansion coefficients of the light guide plate 120 and the frame 110 are different, the plurality of first colloid units 142 are arranged separately from each other in the X direction, which can evenly disperse the stress applied to the first surface 132 of the reflector 130 by the light guide plate 120 after being heated, and reduce the stress difference between the first surface 132 and the second surface 134 of the reflector 130. In this way, the flatness of the reflector 130 can be maintained, and the visual taste of the display device 100 can be maintained.

[0057] Please continue to refer to Figure 1C . The first colloid 140 and the second colloid 150 both extend along the X direction. In some embodiments, the second colloid 150 is a continuous colloid extending along the X direction, which has the advantage of being easier to rework. The two ends of the first colloid 140 have a first distance L1, and the two ends of the second colloid 150 have a second distance L2, and the first distance L1 is greater than the second distance L2. When the first distance L1 is greater than the second distance L2, the display device 100 can be provided with better uniform light. If the first distance L1 is less than the second distance L2, although the raw material cost of the production can be reduced and it is easier to rework, it will affect the uniform light of the display device 100.

[0058] Please continue to refer to Figure 1C . In some embodiments, in the X direction, the distance between the center position of the first colloid 140 and the center position of the second colloid 150 is not greater than about 1 mm. It should be noted that the center position of the first colloid 140 is defined as a position that is half the length of the first distance L1 from both ends of the first colloid 140 in the X direction. The center position of the second colloid 150 is defined as a position that is half the length of the second distance L2 from both ends of the second colloid 150 in the X direction. In some embodiments, when the center position of the first colloid 140 in the X direction is aligned with the center position of the second colloid 150 in the X direction in the Y direction, the display device 100 can have the best visual taste.

[0059] Please continue to refer to Figure 1CIn some embodiments, the first colloid 140 has a first coverage area AR1, and the second colloid 150 has a second coverage area AR2. The ratio of the first coverage area AR1 to the second coverage area AR2 is in the range of about 0.85 to about 1.15. It should be noted that the first coverage area AR1 is defined as the sum of the areas of the reflective sheet 130 covered by the plurality of first colloid units 142 of the first colloid 140, and the second coverage area AR2 is defined as the area of ​​the reflective sheet 130 covered by the second colloid 150. Please refer to Figure 1B When the ratio of the first coverage area AR1 to the second coverage area AR2 falls within a range of about 0.85 to about 1.15, the stress of the first surface 132 and the second surface 134 of the reflector 130 can be better dispersed, and the flatness of the reflector 130 can be maintained. In some embodiments, when the ratio of the first coverage area AR1 to the second coverage area AR2 is about 1, the display device 100 can have the best visual taste.

[0060] Please continue to refer to Figure 1D . Figure 1D Based on Figure 1C 1D is a partial enlarged view of one embodiment of the display device 100. In some embodiments, the display device 100 further includes a plurality of light emitting elements 160 and the plurality of light emitting elements 160 are arranged separately from each other along the X direction. Figure 1B The plurality of light emitting elements 160 are located on the side wall 112 of the frame 110 and face the light incident surface 122 of the light guide plate 120 in the Y direction. In some embodiments, in the Z direction, the projection range of the light guide plate 120 overlaps with the projection range of the plurality of light emitting elements 160. In some embodiments, the center positions of the plurality of light emitting elements 160 in the Z direction are substantially aligned with the center position of the light guide plate 120 in the Z direction.

[0061] Please continue to refer to Figure 1B. In some embodiments, in the Y direction, the first colloid 140 is closer to the plurality of light-emitting elements 160 than the second colloid 150. For example, the edge of the first colloid 140 is substantially aligned with the light incident surface 122 of the light guide plate 120 in the Z direction, and the second colloid 150 does not overlap with the first colloid 140 in the Z direction, and therefore will be farther away from the plurality of light-emitting elements 160 to maintain the flatness of the surface of the reflective sheet 130 and the uniform light of the display device 100. Since the first colloid 140 is in contact with the light guide plate 120, the optical effect of the light guide plate 120 will be affected. If the first colloid 140 having a plurality of first colloid units 142 is too far away from the plurality of light-emitting elements 160 in the Y direction, the display device 100 will have uneven brightness due to being too close to the display area of ​​the display device 100 and the difference in light transmittance caused by the first colloid units 142. On the other hand, the second colloid 150 being disposed farther away from the plurality of light emitting elements 160 will not affect the optical effect of the light guide plate 120 because the second colloid 150 is located on the second surface 134 of the reflective sheet 130 and is shielded by the reflective sheet 130 .

[0062] Please refer to Figure 1D In some embodiments, a plurality of gaps 144 are spaced between the plurality of first colloid units 142. The plurality of light emitting elements 160 face the plurality of gaps 144 between the plurality of first colloid units 142, respectively. Light energy of the light emitting elements 160 directly enters the light guide plate 120 through the gaps 144 between the first colloid units 142 without passing through the first colloid units 142, and the light emitting efficiency of the display device 100 can be maintained.

[0063] Please continue to refer to Figure 1D In some embodiments, the gap width W1 of the gap 144 between two adjacent first colloid units 142 is greater than the element width W2 of the plurality of light emitting elements 160. Since the light emitting element 160 has a light emitting angle θ, when the element width W2 is less than the gap width W1, most of the light energy within the light emitting angle θ of the light emitting element 160 directly enters the light guide plate 120 through the gap 144 between the first colloid units 142 without passing through the first colloid units 142, which can improve the light emitting efficiency of the display device 100. In some embodiments, when the plurality of light emitting elements 160 respectively face the plurality of gaps 144 between the plurality of first colloid units 142, and the gap width W1 of the gap 144 is greater than the element width W2 of the plurality of light emitting elements 160, the display device 100 can maintain a light emitting efficiency of about 100%. In some embodiments, the light emitting angle θ of the light emitting element 160 is about 120 degrees.

[0064] Please refer to Figure 2 . Figure 2 Based on Figure 1C1D is a partially enlarged top-down perspective view of another embodiment of the display device 100. In this embodiment, the plurality of light-emitting elements 160 of the display device 100 face the plurality of first colloid units 142 respectively. The plurality of first colloid units 142 will overlap with the light-emitting angle θ of the light-emitting element 160 in the Y direction, so that the light of the light-emitting element 160 needs to pass through the first colloid unit 142 to enter the light guide plate 120. The first colloid unit 142 will reduce the transmittance of light, thereby reducing the light-emitting efficiency of the display device 100. In some embodiments, when the plurality of light-emitting elements 160 face the plurality of first colloid units 142 respectively, the light-emitting efficiency of the display device 100 may be reduced to about 95% to about 97%.

[0065] Please refer to Figure 3 . Figure 3 Based on Figure 1C 1D is a partially enlarged top-down perspective view of another embodiment of the display device 100. The display device 100 includes a second colloid 150', and the second colloid 150' includes a plurality of second colloid units 152. The plurality of second colloid units 152 are arranged along the X direction and separated from each other, and a gap 154 ​​is provided between two adjacent second colloid units 152. In a unit distance L3 extending along the X direction, the number of gaps of the first colloid unit 142 is greater than the number of gaps of the second colloid unit 152. Since the thermal expansion coefficient of the light guide plate 120 is greater than the thermal expansion coefficient of the frame 110, the first surface 132 of the reflective sheet 130 adjacent to the light guide plate 120 needs to reserve more space to buffer the stress generated by the light guide plate 120, so the number of gaps of the first colloid unit 142 is greater than the number of gaps of the second colloid unit 152. If the number of gaps of the first colloid unit 142 is less than or equal to the number of gaps of the second colloid unit 152, the reflective sheet 130 will be distorted.

[0066] From the above detailed description of the specific implementation methods of the present disclosure, it can be clearly seen that in the display device of some embodiments of the present disclosure, the light guide plate, the reflective sheet and the frame are fixed to each other in the Z direction by the first colloid and the second colloid. The first colloid and the second colloid do not overlap in the Z direction and the first colloid has a plurality of first colloid units arranged separately from each other in the X direction, which can evenly distribute the stress on the first surface and the second surface of the reflective sheet to prevent the reflective sheet from being distorted when the display device is heated and maintain the visual taste of the display device. On the other hand, the first colloid will be closer to the plurality of light-emitting elements than the second colloid, which helps to maintain the uniformity of the display device. In addition, the plurality of light-emitting elements face the gaps between the plurality of first colloid units, which can maintain the luminous efficiency of the display device.

[0067] The foregoing summarizes the features of several embodiments so that those skilled in the art can better understand the aspects of the present disclosure. Those skilled in the art should understand that they can easily use the present disclosure as a basis for designing or modifying other processes and structures for achieving the same purpose and / or achieving the same advantages of the embodiments described herein. Those skilled in the art should also recognize that these equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they can make various changes, substitutions and replacements herein without departing from the spirit and scope of the present disclosure.

Claims

1. A display device, characterized in that: Include: a frame; A light guide plate, located on the frame; A reflective sheet, located between the light guide plate and the frame; A first colloid is located on a first surface of the reflective sheet adjacent to the light guide plate, and the first colloid comprises: A plurality of first colloid units are arranged along a first direction, the first colloid units are separated from each other, and two ends of the first colloid have a first distance; and A second colloid is located on a second surface of the reflector adjacent to the frame and does not overlap the first colloid. The second colloid extends along the first direction. Two ends of the second colloid have a second distance, and the first distance is greater than the second distance.

2. The display device according to claim 1, wherein: The second colloid is a continuous colloid extending along the first direction.

3. The display device according to claim 1, wherein: Also includes: A plurality of light emitting elements are located on a side wall of the frame body. The light emitting elements are arranged separately from each other along the first direction and face a light incident surface of the light guide plate.

4. The display device according to claim 3, characterized in that The first colloid is closer to the light-emitting elements than the second colloid.

5. The display device according to claim 3, characterized in that A plurality of gaps are spaced between the first colloid units, and the light-emitting elements respectively face the gaps between the first colloid units.

6. The display device according to claim 5, characterized in that A gap width of one of the gaps between two adjacent ones of the first colloid units is greater than an element width of the light emitting elements.

7. The display device according to claim 3, characterized in that: The light emitting elements face the first colloid units respectively.

8. The display device according to claim 1, wherein: In the first direction, a distance between a center position of the first colloid and a center position of the second colloid is no greater than 1 mm.

9. The display device according to claim 1, wherein: The second colloid comprises: A plurality of second colloid units are arranged along the first direction, the second colloid units are separated from each other, and in a unit distance extending along the first direction, the number of gaps between the first colloid units is greater than the number of gaps between the second colloid units.

10. The display device according to claim 1, wherein: The first colloid has a first coverage area, the second colloid has a second coverage area, and a ratio of the first coverage area to the second coverage area is in a range of 0.85 to 1.15.

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