US20190154905A1

US20190154905A1 - Electronic display device

Info

Publication number: US20190154905A1
Application number: US16/255,905
Authority: US
Inventors: Yung-Yu Tsai; Chin-Tu TSAI; Wen-Hung Lee; Ting-Yen Lin; Tzu-Yuan Lin
Original assignee: Innolux Corp
Current assignee: Innolux Corp
Priority date: 2014-09-15
Filing date: 2019-01-24
Publication date: 2019-05-23
Also published as: US20160081203A1; US9733419B2; US20170299803A1; TWM496780U

Abstract

The electronic display device includes a display panel, an optical film unit, a first light source member, and a rear chassis assembly. The optical film unit and the first light source member are disposed corresponding to the display panel. The rear chassis assembly includes a substrate, a first side wall, a second side wall, and a bracket. The substrate has a front surface. The first side wall and the second side wall are respectively disposed on opposite sides of the substrate, and have substantially the same curvature. The bracket is disposed on the front surface of the substrate and has substantially the same curvature as the substrate. The bracket is disposed between the front surface of the substrate and the optical film unit.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of application Ser. No. 15/641,623, filed on Jul. 5, 2017, which is a continuation of application Ser. No. 14/845,040, filed on Sep. 3, 2015, now U.S. Pat. No. 9,733,416, issued on Aug. 15, 2017, which claims the priority of Taiwan Patent Application No. 103216319, filed on Sep. 15, 2014, the disclosure of which is hereby incorporated by reference herein in its entirety.

BACKGROUND

Field of the Invention

The disclosure relates to an electronic display device and element thereof, and in particular it relates to a curved electronic display device and a rear chassis assembly thereof.

Description of the Related Art

An electronic display device is an optoelectronic device able to transfer electric signals into visible images so that human beings can see the information contained in the electronic signals. LCDs (Liquid-Crystal displays), PDP (plasma display panel) displays, EL (electro luminescence) displays, FEDs (field emission displays), and DMD (deformable mirror device) displays have gained great popularity. Because of their slimness, low power consumption and low radiation, these image-display devices have been widely used in portable electronic devices such as desktop computers, notebook computers, personal digital assistants (PDAs), and mobile phones, and are even gradually replacing cathode ray tube (CRT) monitors and conventional TVs.
Recently, market trends have led to the size of the electronic display device increasing over time. As the size of the flat panel liquid-crystal display is increased, a difference in views is experienced between different viewing angles. Normally, for a flat electronic display device, the position head on with the central line of the electronic display device is the best view position. The viewers at other positions may feel different viewing experience compared with the viewer in the position that is head-on with the center. For example, a trapezoidal distortion problem may occur as the viewer watches the electronic display device with a relatively large viewing angle.
One solution is to use an electronic display device with a curved display surface. The curved electronic display device not only provides multiple viewing angles for watching but eliminates the trapezoidal distortion problem. Although the curved electronic display device has already existed in the market for some time, in order to maintain the desired curvature a bulky and large enforcing bracket is usually used for enhancing the structural strength. However this does not fulfill the requirements of being slim and having an attractive appearance of today's electronic display devices.

SUMMARY

In light of the foregoing problem, one objective of the disclosure is to provide an electronic display device with a curved display surface. The electronic display device utilizes a sheet with relatively small size to maintain the desired curvature of the electronic display device. As a result, the thickness of the electronic display device is decreased, and the electronic display device has a beautiful exterior look. In addition, since the desired curvature of the electronic display device is maintained, the other elements (such as wiring lines and exterior housing member) of the electronic display device can be assembled efficiently, and the product yield is also improved.
According to one embodiment, the electronic display device includes an electronic display panel and a rear chassis assembly. The electronic display panel has a display surface. The rear chassis assembly includes a substrate, a first side wall, a second side wall, a first sheet, and a second sheet. The substrate has a curvature. The first side wall and the second side wall are respectively disposed on two opposite sides of the substrate. A space is defined by the first and second side walls and the substrate for the position of the electronic display panel. The first sheet is fixed on the first side wall, and the curvature of the first sheet substantially corresponds to the curvature of the first side wall. The second sheet is fixed on the second side wall, and the curvature of the second sheet substantially corresponds to the curvature of the second side wall.
In some embodiments, each of the first side wall and second side wall has a setting surface. Each of the setting surfaces is substantially perpendicular to the display surface. The first sheet is disposed on the setting surface of the first side wall, and the second sheet is disposed on the setting surface of the second side wall.
In the above-mentioned embodiments, the substrate has a through hole, and the rear chassis assembly further includes a bracket and a third sheet. The bracket includes a main portion arranged on a front surface of the substrate which faces the electronic display panel and includes an extending portion protruding from the main portion in a direction away from the electronic display panel and passing through the through hole. The third sheet is connected to the extending portion, and the curvature of the third sheet substantially corresponds to the curvature of the substrate. In some embodiments, the substrate includes a flange arranged adjacent to the through hole, and the flange is clamped between the extending portion and the third sheet.
In the above-mentioned embodiments, the electronic display device further includes a light source member, wherein the main portion of the bracket extends from the second side wall to the first side wall, and the light source member is arranged adjacent to the second side wall and disposed on the bracket for dissipating heat from the light source member via the bracket. Alternatively, the electronic display device further includes two heat dissipation plates respectively connected to two sides of the bracket and includes two light source members respectively disposed on the two dissipation plates for dissipating heat from the two light source members via the two heat dissipation plates and the bracket.
In some other embodiments, the substrate includes a back surface which is away from the electronic display panel and includes a supporting surface connected to the back surface, wherein the supporting surface protrudes from the back surface in a direction away from the electronic display panel, and the third sheet is disposed on the supporting surface.
In any of the above-mentioned embodiments, each of the first sheet, the second sheet, and the third sheet has a flat configuration.
In any of the above-mentioned embodiments, the display surface is a curved surface.
In any of the above-mentioned embodiments, the ratio of the thickness of each of the first sheet and the second sheet and the thickness of one of the corresponding first and second side walls is in a range from 1 to 3.
According to one embodiment, the display device includes a display panel, an optical film unit, a first light source member, and a rear chassis assembly. The optical film unit and the first light source member are disposed corresponding to the display panel. The rear chassis assembly includes a substrate, a first side wall, a second side wall, and a bracket. The substrate has a front surface. The first side wall and the second side wall are respectively disposed on opposite sides of the substrate, and the second side wall has substantially the same curvature as the first side wall. A space is defined by the first side wall, the second side wall, and the substrate for the position of the display panel, the optical film, and the first light source member. The bracket is disposed on the front surface of the substrate and has substantially the same curvature as the substrate. The bracket is disposed between the front surface of the substrate and the optical film unit, and the bracket includes metal.
According to one embodiment, the display device includes a display panel, an optical film unit, a first light source member, and a rear chassis assembly. The optical film unit and the first light source member are disposed corresponding to the display panel. The rear chassis assembly includes a substrate, a first side wall, a second side wall, and a sheet. The substrate has a back surface. The first side wall and the second side wall are respectively disposed on opposite sides of the substrate, and the second side wall has substantially the same curvature as the first side wall. A space is defined by the first side wall, the second side wall, and the substrate for the position of the display panel, the optical film, and the first light source member. The sheet is disposed on the back surface of the substrate and has substantially the same curvature as the substrate.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:

FIG. 1 shows a cross-sectional view of an electronic display device, in accordance with some embodiments.

FIG. 2 shows an exploded view of a rear chassis assembly, in accordance with some embodiments.

FIG. 3 shows a cross-sectional view taken along line A-A of FIG. 2.

FIG. 4 shows a cross-sectional view taken along line B-B of FIG. 2.

FIG. 5 shows a cross-sectional view taken along line C-C of FIG. 2.

FIG. 6 shows an exploded view of a rear chassis assembly, in accordance with some other embodiments.

FIG. 7 shows a cross-sectional view taken along line D-D of FIG. 6.

FIG. 8 shows a cross-sectional view of a portion of a rear chassis assembly, in accordance with some other embodiments.

FIG. 9 shows a schematic view of partial elements of an electronic display device, in accordance with some embodiments.

FIG. 10 shows a cross-sectional view of partial elements of an electronic display device, in accordance with some embodiments.

DETAILED DESCRIPTION

Several exemplary embodiments of the application are described with reference to FIGS. 1 through 10. It is to be understood that the following disclosure provides various different embodiments as examples for implementing different features of the application. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense.
FIG. 1 shows a transverse cross-sectional view of an electronic display device 1 a, in accordance with some embodiments. In some embodiments, the electronic display device 1 a is a liquid-crystal display device which includes a rear chassis assembly 10 a, a front bezel 20, a backlight module 30, an optical film unit 40, and an electronic display panel 50. The backlight module 30, the optical film unit 40, and the electronic display panel 50 are positioned in a space defined by the rear chassis assembly 10 a and the front bezel 20. The electronic display panel 50 is a liquid-crystal display panel. The backlight module 30 provides backlight to the electronic display panel 50 via the optical film unit 40. However, it should be appreciated that while the electronic display device 1 a is a liquid-crystal display device, the disclosure is not limited thereto. In some other embodiments, the electronic display device 1 a is an OLED (Organic Light-Emitting Diode) display device or a display device of another type.
FIG. 2 shows an exploded view of the rear chassis assembly 10 a, in accordance with some embodiments. In some embodiments, the rear chassis assembly 10 a includes a chassis body 110 a and an auxiliary unit 130.
The chassis body 110 a includes a substrate 115 a and a number of side walls, such as first side wall 111, second side wall 113, third side wall 112, and fourth side wall 114. The substrate 115 a has a configuration with a thin, curved plate which has a curvature on the horizontal plane. In some embodiments, the substrate 115 a includes a first portion 1151, a second portion 1152, and a connecting portion 1153. The first and second portions 1151 and 1152 extend along a vertical direction. The connecting portion 1153 extends along a horizontal direction. The first and second portions 1151 and 1152 are connected to one another via the connecting portion 1153. The first side wall 111, the second side wall 113, the third side wall 112, and the fourth side wall 114 protrude from the upper edge 1154, lower edge 1155, left edge, and right edge along a direction away from the electronic display panel 50 (FIG. 1), so as to define a space 1151 for receiving the electronic display panel 50. In some embodiments, the first and second side walls horizontally extend toward the electronic display panel 50, however the disclosure should not be limited thereto.
The auxiliary unit 130 includes a number of sheets for maintaining the structure of the chassis body 110 a. In some embodiments, the auxiliary unit 130 includes a first sheet 131, a second sheet 132, and third sheet 133. Each of the first sheet 131, the second sheet 132, and the third sheet 133 has a flat configuration and extends in a horizontal direction. In addition, each of the first sheet 131, the second sheet 132, and the third sheet 133 has a curvature which is the same as the curvature of the substrate 115 a. In some other embodiments, the auxiliary unit 130 merely includes the first sheet 131 and the second sheet 132.
FIGS. 3-5 are schematic views showing how the first sheet 131, the second sheet 132, and the third sheet 133 are connected to the substrate 115 a. As shown in FIG. 3, the first sheet 131 is positioned on a setting surface 1110 of the first side wall 111 via one or more fixing elements 70 (such as screws or bolts). Moreover, as shown in FIG. 4, the second sheet 132 is positioned on an setting surface 1130 of the second side wall 113 via one or more fixing elements 70 (such as screws or bolts). The first sheet 131 and the second sheet 132 are configured to support or reinforce the curved structure of the substrate 115 a, but the disclosure should not be limited thereto. In addition, as shown in FIG. 5, the third sheet 133 is positioned on a back surface 1157 of the substrate 115 a via one or more fixing element 70 (such as screws or bolts). The third sheet 133 is arranged between the upper edge 1154 and the lower edge 1155. Specifically, as shown in FIG. 2, a supporting surface 1157 s is defined as a region of the back surface 1157 of the substrate 115 a which corresponds to the connection portion 1153. The supporting surface 1157 s is arranged parallel to the horizontal plane, and the third sheet 133 is positioned on the supporting surface 1157 s. In some embodiments, the extension direction the supporting surface 1157 s is parallel to the extension direction of the first side wall 111 or the second side wall 113.
In some embodiments, the thickness of the first sheet 131 is greater than the thickness of the first side wall 111, and the thickness of the second sheet 132 is greater than the thickness of the second side wall 113. For example, the ratio of the thickness of each of the first sheet and the second sheet and the thickness of one of the corresponding first and second side walls is in a range from 1 to 3 so that the curvature of the chassis body 110 a is maintained.
In some embodiments, the first sheet 131, the second sheet 132, and the third sheet 133 are made of the same or different materials as those of the chassis body 110 a. Each of the first sheet 131, the second sheet 132, and the third sheet 133 has less deformation than the chassis body 110 a as an external thrust is applied. For example, the first sheet 131, the second sheet 132, and the third sheet 133 are made of material selected from iron or stainless steel. The chassis body 110 a is made of aluminium or alloy.
In the above-mentioned embodiments, with the arrangement of the auxiliary unit 130, a change in the curvature of the substrate 115 a of the chassis body 110 a can be prevented. Moreover, since the chassis body 110 a has a fixed curvature, the assembly efficiency and the production yield are improved accordingly. In addition, since the auxiliary unit 130 has a flat configuration, the thickness of the electronic display device 1 a is not increased due to the use of the auxiliary unit 130. As a result, the entire thickness of chassis body 110 a is less than the thickness of a rear chassis assembly in which a “C”-shaped reinforcing bracket is used, and the chassis body 110 a has a beautiful look.
It should be noted that while the auxiliary unit 130 includes three sheets, the disclosure should not be limited thereto. The number of sheets and the positions of the sheets can be varied according to demand.
FIG. 6 shows an exploded view of a rear chassis assembly 10 b, in accordance with some other embodiments. In the embodiments of FIG. 6, elements similar to those of the embodiments of FIG. 2 are provided with the same reference numbers, and the features thereof are not repeated in the interest of brevity. Differences between the rear chassis assembly 10 b and the rear chassis assembly 10 a include the substrate 115 a being replaced by a substrate 115 b of the rear chassis assembly 10 b, wherein a through hole 119 is formed at a position adjacent to the junction of the first portion 1151 and the connecting portion 1153.
Differences between the rear chassis assembly 10 a and the rear chassis assembly 10 further includes the rear chassis assembly 10 b having a bracket 120. The bracket 120 has a curvature that is the same as that of the substrate 115 b and includes a main portion 121 and an extending portion 127. The main portion 121 extends from the lower edge 1155 of the substrate 115 b and toward the upper edge 1154. In addition, the main portion 121 is fixed on the front surface 1156, and the main portion 121 has a shape that is compatible with the shape of the front surface 1156 of substrate 115 b. The extending portion 127 is protruding backwardly from the main portion 121 in a direction away from the electronic display panel 50 and passing through the through hole 119. The third sheet 133 is positioned on a portion of the extending portion 127 that is exposed by the through hole 119 via one or more fixing elements 70 (such as screws or bolts). The bracket 120 is made of the same or different materials as those of the chassis body 110 b. In some embodiments, the material of the bracket 120 is a metal with high heat conductivity (such as aluminium).
In the above-mentioned embodiment, with the arrangements of the bracket 120 and the auxiliary unit 130, a change in the curvature of the substrate 115 b of the chassis body 110 b can be prevented. In addition, the bracket 120 also serves a function of dissipating the heat. The details will be discussed in the descriptions relating to FIG. 9.
FIG. 8 shows a cross-sectional view of a portion of a rear chassis assembly 10 c, in accordance with some other embodiments. In the embodiments of FIG. 8, elements similar to those of the embodiments of FIG. 7 are provided with the same reference numbers, and the features thereof are not repeated in the interest of brevity. Differences between the rear chassis assembly 10 c and the rear chassis assembly 10 b include the substrate 115 b of the rear chassis assembly 10 b being replaced by a substrate 115 c of the rear chassis assembly 10 c, wherein the substrate 115 c further includes a flange 1158 arranged adjacent to the through hole 119 and extends along a particular direction. In some embodiments, the extension direction of the flange 1158 is parallel to the horizontal plane. In some embodiments, the extension direction of the flange 1158 is parallel to the extension direction of the first side wall 111 or the second side wall 113. As shown in FIG. 8, the third sheet 133 is positioned on the flange 1158 via one or more fixing element 70 (such as screws or bolts), wherein the flange 1158 is clamped between the extending portion 127 and the third sheet 133.
In the above-mentioned embodiment, with the arrangements of the bracket 120 and the auxiliary unit 130, a change in the curvature of the substrate 115 c of the chassis body 110 c can be prevented. In addition, since the third sheet 133 is fixed on the bracket 120 and the flange 1158 of the substrate 115 c, the curvature of the bracket 120 and the curvature of the flange 1158 can be regulated by the third sheet 133 so as to facilitate maintaining the curvature of the overall rear chassis assembly 10 c.
The rear chassis assembly of the disclosure can be applied to a number of different electronic display devices. For example, as shown in FIG. 9, a schematic view of partial elements of an electronic display device 1 b, in accordance with some embodiments, is shown. The electronic display device 1 b is a single side light entry liquid-crystal display device and includes the rear chassis assembly 10 b and a light source member. The light source member 60 is arranged adjacent to the second side wall 113 and disposed on the bracket 120. Since the bracket 120 has relatively high heat dissipation characteristics, the bracket 120 is used for dissipating heat from the light source member 60.
Alternatively, as shown in FIG. 10, a schematic view of partial elements of an electronic display device 1 c, in accordance with some embodiments, is shown. The electronic display device 1 c is a double side light entry liquid-crystal display device and includes the rear chassis assembly 10 b, two light source members 60, and two heat dissipation plates 80. The two heat dissipation plates 80 are fixed on the front surface 1156 of the substrate 115 b, wherein the two heat dissipation plates 80 are respectively adjacent to the third side wall 112 and fourth side wall 114 and connected to the two sides of the bracket 120. The two light source members 60 are respectively disposed on the two dissipation plates 80. Since the bracket 120 and the heat dissipation plates 80 have relatively high heat dissipation characteristics, the bracket 120 and the heat dissipation plates 80 are used for dissipating the heat from the light source member 60.
While the invention has been described by way of example and in terms of the described embodiments, it is to be understood that the invention is not limited thereto. On the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.

Claims

What is claimed is:

1. A display device, comprising:

a display panel;

an optical film unit disposed corresponding to the display panel;

a first light source member disposed corresponding to the display panel; and

a rear chassis assembly comprising:

a substrate having a front surface;

a first side wall and a second side wall respectively disposed on two opposite sides of the substrate, and the second side wall having substantially the same curvature as the first side wall, wherein a space is defined by the first side wall, the second side wall, and the substrate for the position of the display panel, the optical film and the first light source member; and

a bracket disposed on the front surface of the substrate and having substantially the same curvature as the substrate, wherein the bracket is disposed between the front surface of the substrate and the optical film unit, and the bracket comprises metal.

2. The display device as claimed in claim 1, wherein the bracket is positioned adjacent to the first side wall or the second side wall.

3. The display device as claimed in claim 1, further comprising a fixing element, wherein the bracket is fastened on the substrate via the fixing element.

4. The display device as claimed in claim 1, wherein a width of the bracket is less than a width of the substrate.

5. The display device as claimed in claim 1, further comprising a first heat dissipation plate positioned adjacent to the first light source member.

6. The display device as claimed in claim 1, wherein a length of the first light source member is less than a length of the bracket.

7. The display device as claimed in claim 1, further comprising a second light source member disposed adjacent to a side of the bracket.

8. The display device as claimed in claim 7, further comprising a second heat dissipation plate positioned adjacent to the second light source member.

9. The display device as claimed in claim 1, wherein the bracket serves a function of dissipating heat.

10. The display device as claimed in claim 1, wherein the bracket maintains the curvature.

11. A display device, comprising:

a display panel;

an optical film unit disposed corresponding to the display panel;

a first light source member disposed corresponding to the display panel; and

a rear chassis assembly comprising:

a substrate having a back surface;

a sheet disposed on the back surface of the substrate and having substantially the same curvature as the substrate.

12. The display device as claimed in claim 11, wherein the sheet is disposed on a middle portion of the substrate, the sheet is adjacent to the first side wall, or the sheet is adjacent to the second side wall.

13. The display device as claimed in claim 11, further comprising a fixing element, wherein the sheet is fastened on the substrate via the fixing element.

14. The display device as claimed in claim 11, further comprising a first heat dissipation plate positioned adjacent to the first light source member.

15. The display device as claimed in claim 11, wherein a length of the first light source member is less than a length of the sheet.

16. The display device as claimed in claim 14, further comprising:

a second heat dissipation plate disposed on the substrate; and

a second light source member positioned adjacent to the second heat dissipation plate.

17. The display device as claimed in claim 11, wherein the sheet maintains the curvature.

18. The display device as claimed in claim 11, wherein the sheet has a flat configuration.

19. The display device as claimed in claim 11, wherein the substrate extends along a vertical direction, and the sheet extends along a horizontal direction.