CN112449027B

CN112449027B - Terminal equipment

Info

Publication number: CN112449027B
Application number: CN201910806951.0A
Authority: CN
Inventors: 李金泽
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2023-07-18
Anticipated expiration: 2039-08-29
Also published as: CN112449027A

Abstract

The application provides a terminal device, which comprises a shell, a backlight module, a display panel and a first supporting element, wherein the display panel comprises a display area and a non-display area. The first supporting element is arranged between the backlight module and the shell, and the shell supports the backlight module through the first supporting element. The projection of the first supporting element on the display panel is at least partially positioned in the non-display area. In this application, through supporting backlight unit, avoid leading to backlight unit's position to change because of environmental change or dimensional tolerance to avoid the light leak phenomenon, improve terminal equipment's display effect.

Description

Terminal equipment

Technical Field

The present application relates to electronic devices, and in particular, to a terminal device.

Background

The full screen age of terminal equipment has come, and the full screen design brings a series of problems when bringing better use experience for users. Taking a mobile phone as an example, the design of a full screen requires that the border area of the mobile phone frame and the display screen be narrowed, and the narrowing of the border area may cause the risk of light leakage. As shown in fig. 1, in the border area of the display screen, the frame 21a of the backlight module is not reliably supported, and the frame 21a is easily deformed due to temperature variation or assembly tolerance, so that the positions of the backlight 22a and the light guide plate 24a supported by the frame 21a are changed, and the light emitting direction is correspondingly changed, thereby generating a light leakage risk and affecting the display effect of the mobile phone.

Disclosure of Invention

The application provides a terminal device for improving display effect.

The application provides a terminal equipment, including casing, backlight unit, display panel and first support element, display panel includes display area and non-display area, first support element set up in backlight unit with between the casing, the casing passes through first support element is right backlight unit supports, first support element is in projection on the display panel is located at least part non-display area.

Further, the first supporting element has elasticity, and the compression ratio of the first supporting element ranges from 40% to 60%.

Further, the backlight module comprises a frame and a backlight source, the first supporting element is located between the frame and the shell, and the orthographic projection of the first supporting element on the display panel is at least partially overlapped with the orthographic projection of the backlight source on the display panel.

Further, the backlight module comprises a circuit board electrically connected with the backlight source, wherein the circuit board comprises a first circuit board part and a second circuit board part, and at least part of the frame is positioned between the first circuit board part and the second circuit board part.

Further, the terminal device includes a protective cover plate and a second supporting element, the protective cover plate covers the display panel, the second supporting element is located between the protective cover plate and the frame, and the protective cover plate supports the frame through the second supporting element.

Further, the front projection of the first support element on the display panel coincides with the front projection of the second support element on the display panel.

Further, the display panel includes a TFT layer including an edge portion located in the non-display region, the second support member connects the edge portion and the protective cover plate, and the protective cover plate supports the frame through the edge portion.

Further, the first support element is made of foam and the second support element is made of silicone adhesive.

Further, the frame includes a first supporting portion, a bending portion and a second supporting portion that are disposed along a circumferential direction of the backlight source, the housing supports the first supporting portion through the first supporting element, and the protective cover supports the second supporting portion through the second supporting element.

Further, the terminal device is characterized by comprising a connecting element, wherein the connecting element comprises a first connecting part and a second connecting part, the first connecting part is used for being connected with the backlight module, and the second connecting part is used for being connected with the display panel.

Further, the first connecting portion and the second connecting portion have viscosity, and the viscosity of the first connecting portion is greater than that of the second connecting portion.

Further, the connecting element includes a buffer portion between the first connecting portion and the second connecting portion, the buffer portion having elasticity.

In this application, through supporting backlight unit effectively, avoid leading to backlight unit's position to change because of environmental change or dimensional tolerance to avoid the light leak phenomenon, and then improve terminal equipment's display effect.

Drawings

Fig. 1 is a schematic cross-sectional view of a prior art terminal device.

Fig. 2 is a schematic cross-sectional view of one embodiment of a terminal device of the present application.

Fig. 3 is a schematic cross-sectional view of a backlight module and a display panel of the terminal device shown in fig. 2.

Fig. 4 is a schematic cross-sectional view of a connection element of the terminal device shown in fig. 2.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus consistent with some aspects of the present application as detailed in the accompanying claims.

The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "plurality" means two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and/or "upper" and the like are merely for convenience of description and are not limited to one location or one spatial orientation. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

Referring to fig. 2 to 3, the present application provides a terminal device, which may be a device with a computing capability, such as a mobile phone, a tablet computer, a notebook computer, a smart watch, or a device mainly used for display, such as a television, a display, etc. The terminal equipment comprises a shell, a backlight module, a display panel and a first supporting element, wherein the display panel comprises a display area and a non-display area, the first supporting element is arranged between the backlight module and the shell, the shell supports the backlight module through the first supporting element, and the projection of the first supporting element on the display panel is at least partially positioned in the non-display area. By supporting the backlight module, the position of the backlight module is prevented from changing due to environmental change or dimensional tolerance, so that the light leakage phenomenon is avoided, and the display effect of the terminal equipment is improved.

Referring to fig. 2 and 3, the terminal device in this embodiment is a mobile phone, and includes a housing 1, a display screen mounted on the housing, a flip chip film 8 electrically connected to the display screen, and a protective cover 4 covering the display screen. The housing 1 may include a front case, a rear case, a middle frame, and the like. The display screen comprises a backlight module 2 and a display panel 3. The light generated by the backlight module 2 is changed in the rear direction of the display panel 3, so as to form different colors, and in this embodiment, the display panel 3 is a liquid crystal display panel. Of course, the mobile phone further includes a battery, a motherboard, and other structures, which are not described in detail in this embodiment.

In this embodiment, the direction of the backlight module 2 pointing to the display panel 3 is taken as the upward direction, and the direction of the display panel 3 pointing to the backlight module 2 is taken as the downward direction.

The backlight module 2 includes a frame 21, a backlight 22 supported by the frame 21, a circuit board 23, and a light guide plate 24 for conducting light, wherein the circuit board 23 is used for electrically connecting the backlight 22 to a main board (not shown) of a terminal device, and the main board controls the working state of the backlight 22 through the circuit board, in this embodiment, the backlight 22 is an LED (light emitting diode), and the circuit board 23 is a flexible circuit board (FPC). The frame 21 includes a first supporting portion 211, a bending portion 212, and a second supporting portion 213 disposed along a circumferential direction of the backlight 21, that is, the first supporting portion 211 is bent to form the bending portion 212 and the second supporting portion 213. Optionally, the circuit board 23 includes a first circuit board portion 231 located below the first supporting portion 211, a second circuit board portion 232 located above the first supporting portion 211, and a curved portion 233 connecting the first circuit board portion 231 and the second circuit board portion 232, and the second circuit board portion 232 is located between the light guide plate 24 and the frame 21, that is, the first supporting portion 211 of the frame 21 is located between the first circuit board portion 231 and the second circuit board portion 232. The circuit board 23 is arranged in this way, so that the occupied area can be reduced, and the boundary area of the display screen can be further reduced, which is beneficial to improving the screen occupation ratio of the terminal equipment.

The display panel 3 includes a TFT layer 31, a liquid crystal layer (not shown), a color filter 32, a polarizer 33, and an optical adhesive 34, and the chip on film 8 (COF) is bent from the front end of the backlight module and is used for electrically connecting the TFT layer to a motherboard, and the motherboard controls an electric field applied to the liquid crystal through the chip on film 8 to control the rotation of the liquid crystal branches. The display panel 3 includes a display area a and a non-display area B (typically, an ink area), and the display area a in fig. 3 only illustrates a part thereof. The TFT layer 31 includes a central portion 311 located in the display area a and an edge portion 312 located in the non-display area B, and the flip-chip film 8 is electrically connected to the edge portion 312.

The terminal device further comprises a first supporting element 5, wherein the first supporting element 5 is arranged between the backlight module 2 and the housing 1 and is used for supporting the backlight module 2. Optionally, the first supporting element 5 is disposed between the frame 21 and the housing 1, and the first supporting element 5 is at least partially located below the non-display area B, in other words, a projection of the first supporting element 5 on the display panel 3 is at least partially located in the non-display area B. In this way, the casing 1 supports the entire backlight module 2 through the first supporting element 5, especially supports a part of the frame located in the non-display area B, and inhibits or avoids the deformation of the part of the frame when the ambient temperature, the humidity change or the internal stress is released, thereby avoiding the light leakage problem caused by the change of the position of the backlight 22 relative to the light guide plate 24.

Optionally, the front projection of the first supporting element 5 on the display panel 3 and the front projection of the backlight 22 on the display panel 3 at least partially overlap, so that the deformation of the frame portion directly connected to the backlight 22 is smaller relative to other portions of the frame 21, and the offset of the backlight 22 and the light guide plate 24 is smaller, thereby further suppressing or avoiding the occurrence of the light leakage problem.

In this embodiment, the first supporting element 5 has elasticity, and may be made of foam material. The thickness (dimension in the up-down direction) of the first supporting member 5 is greater than 0.3mm, and the compression ratio is in the range of 40% to 60%, that is, the first supporting member 5 can be elastically deformed to be compressed to 40% to 60% of the original dimension. Within this compression ratio range, the deformation amount of the frame 21 can be controlled within a proper range, that is, the frame 21 is allowed to deform to release its internal stress, while also effectively avoiding the problem of light leakage. In other embodiments, the first support element 5 may also be made of other elastic materials having similar compression ratios.

With continued reference to fig. 2 and 3, the terminal device further includes a second supporting element 6, and the protective cover 4 covers the display panel 3 to protect the display panel 3. The second support element 6 is located between the protective cover 6 and the frame 21, and the protective cover 4 supports the frame 21 via the second support element 6.

Alternatively, the second support element 6 may be directly connected to the frame 21, or may be indirectly connected to the frame 21 via other elements. In this embodiment, the second supporting element 6 is connected to the edge 311 of the TFT layer 31, and the terminal device further includes a fixing glue 35 and a connecting element 7 disposed above the fixing glue 35, where the fixing glue 35 is adhered to the frame 21, and the connecting element 7 connects the fixing glue 35 and the TFT layer 31. The fixing glue 35 may be a single layer or multiple layers. The TFT layer 31 has a black-and-white glue 36, a prism 37, and a diffusion sheet 38 sequentially disposed below a center layer thereof, the diffusion sheet 38 is connected to the light guide plate 24 below the diffusion sheet 38, and the frame 21 supports the black-and-white glue 36, the prism 37, the diffusion sheet 38, and the display panel 3 above the diffusion sheet 38.

The protective cover 4 supports the frame 21 (in particular the frame part below the non-display area B) by transmitting forces through the edge part 311 of the TFT layer, the fixing glue 35, the connecting element 7. In other words, the frame 21 receives both the upward supporting force of the first supporting member 5 and the downward supporting force of the second supporting member 6, so that the frame 21 cannot be bent upward nor downward. Optionally, the front projection of the first supporting element 5 on the display panel 3 coincides with the front projection of the second supporting element 6 on the display panel 3, so that the force application points of the first supporting element 5 and the second supporting element 6 on the frame 21 are completely consistent, when the frame 21 is stressed, the supporting force of the first supporting element 5 on the frame 21 and the supporting force of the second supporting element 6 on the frame 21 do not generate torque, and the frame 21 can be prevented from being deformed in torsion, thereby avoiding the light leakage phenomenon. In addition, since the frame 21 is strongly supported, the diffusion sheet 38 is not easily floated to be separated from the light guide plate 24, thereby avoiding light leakage in this region. Optionally, the second supporting element 6 also has a certain elasticity, and may be made of silicone adhesive, however, in other embodiments, other materials with elasticity and viscosity may be selected for the second supporting element 6.

Optionally, the housing 1 supports the first supporting portion 211 through the first supporting element 5, the protective cover 4 supports the second supporting portion 212 through the second supporting element 6, and of course, in this embodiment, the second supporting element 6 transmits the supporting force to the second supporting portion 212 through the connecting element 7 and the fixing adhesive 35.

Referring to fig. 4, the connection element 7 includes a first connection portion 71, a second connection portion 72, and a buffer portion 73 located between the first connection portion 71 and the second connection portion 72, where the first connection portion 71 is used for connecting with the frame 21 of the backlight module 2, the second connection portion 72 is used for connecting with the edge portion 311 of the TFT layer 31 of the display screen 3, the first connection portion 71 and the second connection portion 72 have viscosity, the viscosity of the first connection portion 71 is greater than the viscosity of the second connection portion 72, the viscosity of the second connection portion 72 is smaller, while ensuring the absorption dimensional tolerance, allowing the connection element to be disassembled from the TFT layer 31 (or the display panel 3) in the subsequent process; the first connection portion 71 has a high viscosity, so that it is not easily separated from the frame 21, and a light leakage phenomenon caused by the separation of the frame 21 from the first connection portion 71 can be avoided. The buffer 73 has elasticity, for example, is made of foam, and absorbs stress.

Through the combined action of the first supporting element 5, the second supporting element 6 and the connecting element 7, the stress of the frame 21 in the up-down direction is absorbed, the frame 21 is prevented from deforming, the deflection of the backlight source 22, the light guide plate 24 and other elements is restrained or avoided, the light leakage problem is effectively prevented, and the display effect of the terminal equipment is improved.

The foregoing description is only a preferred embodiment of the present application, and is not intended to limit the invention to the particular embodiment disclosed, but is not intended to limit the invention to the particular embodiment disclosed, as the equivalent of some alterations or modifications can be made without departing from the scope of the present application.

Claims

1. The terminal equipment is characterized by comprising a shell, a backlight module, a display panel, a first supporting element, a protective cover plate and a second supporting element, wherein the display panel comprises a display area and a non-display area, the backlight module comprises a frame and a backlight source, the first supporting element is arranged between the frame of the backlight module and the shell, the shell supports the frame of the backlight module through the first supporting element, the projection of the first supporting element on the display panel is at least partially positioned in the non-display area, the protective cover plate is covered on the display panel, the second supporting element is arranged between the frame and the protective cover plate, the protective cover plate supports the frame through the second supporting element, and the orthographic projection of the first supporting element on the display panel coincides with the orthographic projection of the second supporting element on the display panel.

The frame comprises a first supporting part, a bending part and a second supporting part which are arranged along the circumferential direction of the backlight source, wherein the first supporting element is supported on the first supporting part, and the second supporting element is supported on the second supporting part.

2. The terminal device according to claim 1, wherein the first support element has elasticity, and the compression ratio of the first support element ranges from 40% to 60%.

3. The terminal device of claim 1, wherein the front projection of the first support element onto the display panel at least partially coincides with the front projection of the backlight onto the display panel.

4. A terminal device according to claim 3, wherein the backlight module comprises a circuit board electrically connected to the backlight, the circuit board comprising a first circuit board portion and a second circuit board portion, at least a portion of the frame being located between the first circuit board portion and the second circuit board portion.

5. The terminal device according to claim 1, wherein the display panel includes a TFT layer including an edge portion located in a non-display area, the second support member connects the edge portion and the protective cover plate, and the protective cover plate supports the frame through the edge portion.

6. The terminal device of claim 1, wherein the first support element is made of foam and the second support element is made of silicone gel.

7. The terminal device according to claim 1, wherein the frame includes a first support portion, a bent portion, and a second support portion provided along a circumferential direction of the backlight, the housing supports the first support portion by the first support member, and the protective cover supports the second support portion by the second support member.

8. The terminal device according to any of claims 1 to 7, wherein the terminal device comprises a connection element, the connection element comprising a first connection portion for connection with the backlight module and a second connection portion for connection with the display panel.

9. The terminal device of claim 8, wherein the first and second connection portions each have a viscosity, and the viscosity of the first connection portion is greater than the viscosity of the second connection portion.

10. The terminal device according to claim 8, wherein the connection element comprises a buffer portion between the first connection portion and the second connection portion, the buffer portion having elasticity.