CN112449027A

CN112449027A - Terminal device

Info

Publication number: CN112449027A
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: 2021-03-05
Anticipated expiration: 2039-08-29
Also published as: CN112449027B

Abstract

The application provides a terminal device, including casing, backlight unit, display panel and first supporting element, display panel includes display area and 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 located 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 device

Technical Field

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

Background

The full screen era of the terminal equipment comes, and the full screen design brings better use experience to users and simultaneously brings a series of problems. Taking a mobile phone as an example, the full screen design requires the border area of the mobile phone frame and the display screen to be narrowed, and the narrowed border area may cause the risk of light leakage. As shown in fig. 1, in the boundary 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 also changed accordingly, 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 supporting element, display panel includes display area and non-display area, first supporting element set up in backlight unit with between the casing, the casing passes through first supporting element is right backlight unit supports, first supporting element is in projection at least part on the display panel is located non-display area.

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

Furthermore, 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.

Furthermore, the backlight module comprises a circuit board electrically connected with the backlight source, 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.

Furthermore, the terminal device comprises 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, an orthographic projection of the first support element on the display panel coincides with an orthographic 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 supporting element 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.

Furthermore, the frame includes a first supporting portion, a bending portion, and a second supporting portion arranged along the circumferential direction of the backlight source, the casing supports the first supporting portion through the first supporting element, and the protective cover plate supports the second supporting portion through the second supporting element.

Further, the terminal device comprises a connecting element, the connecting element comprises a first connecting portion and a second connecting portion, the first connecting portion is used for being connected with the backlight module, and the second connecting portion is used for being connected with the display panel.

Furthermore, the first connecting part and the second connecting part both have viscosity, and the viscosity of the first connecting part is greater than that of the second connecting part.

Further, the connecting element includes a buffer portion between the first connecting portion and the second connecting portion, and the buffer portion has 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 terminal device in the prior art.

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

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

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

Detailed Description

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

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of 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 "a number" means two or more. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted 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 and all possible combinations of one or more of the associated listed items.

Referring to fig. 2 to fig. 3, the present application provides a terminal device, where the terminal device may be a device with computing processing capability, such as a mobile phone, a tablet computer, a notebook computer, and a smart watch, and may also be a device mainly used for displaying, such as a television and a display. 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 at least part of the projection of the first supporting element on the display panel is positioned in the non-display area. 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.

Referring to fig. 2 and fig. 3, the terminal device in this embodiment is a mobile phone, which includes a housing 1, a display screen mounted on the housing, a flip chip 8 electrically connected to the display screen, and a protective cover 4 covering the display screen. The housing 1 may include a front shell, a rear shell, and a middle frame. The display screen comprises a backlight module 2 and a display panel 3. The light generated by the backlight module 2 changes in the rear direction through the display panel 3 to form different colors, and the display panel 3 is a liquid crystal display panel in this embodiment. Certainly, the mobile phone further includes a battery, a main board, 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 an upward direction, and the direction of the display panel 3 pointing to the backlight module 2 is a downward direction.

The backlight module 2 includes a frame 21, a backlight source 22 supported by the frame 21, a circuit board 23, and a light guide plate 24 for conducting light, where the circuit board 23 is used to electrically connect the backlight source 22 to a main board (not shown) of a terminal device, and the main board controls a working state of the backlight source 22 through the circuit board, and in this embodiment, the backlight source 22 is an LED (light emitting diode), and the circuit board 23 is a Flexible Printed Circuit (FPC). The frame 21 includes a first supporting portion 211, a bending portion 212 and a second supporting portion 213 disposed along the 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. Alternatively, the circuit board 23 includes a first circuit board portion 231 located below the first support portion 211, a second circuit board portion 232 located above the first support portion 211, and a bent 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 support 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, the boundary area of the display screen is further reduced, and the screen occupation ratio of the terminal equipment is favorably improved.

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, the chip on film 8(COF) is bent from the front end of the backlight module 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 (usually, an ink area), of which only a portion is illustrated in the display area a of fig. 3. 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 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 shell 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 whole backlight module 2 through the first supporting member 5, and particularly supports a portion of the frame located in the non-display area B, so as to inhibit or prevent the portion of the frame from being deformed when the ambient temperature and humidity change or internal stress is released, thereby preventing the position of the backlight source 22 relative to the light guide plate 24 from being changed to cause a light leakage problem.

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

In this embodiment, the first supporting element 5 has elasticity, and may be made of foam material. The thickness (the size in the vertical direction) of the first support element 5 is more than 0.3mm, and the compression ratio ranges from 40% to 60%, that is, the first support element 5 can be elastically deformed and compressed to 40% to 60% of the original size. Within this compression ratio range, the deformation amount of the frame 21 can be controlled within a suitable range, that is, the frame 21 can be allowed to deform to release the internal stress thereof, while the problem of light leakage can be effectively avoided. In other embodiments, the first support element 5 may also be made of other elastic materials with similar compression ratios.

With reference to fig. 2 and fig. 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 through another element. In this embodiment, the second supporting element 6 is connected to the edge portion 311 of the TFT layer 31, the terminal device further includes a fixing adhesive 35 and a connecting element 7 disposed above the fixing adhesive 35, the fixing adhesive 35 is adhered to the frame 21, and the connecting element 7 connects the fixing adhesive 35 and the TFT layer 31. The fixing glue 35 may be a single layer or a plurality of layers. The black and white glue 36, the prism 37 and the diffusion sheet 38 are sequentially arranged below the central layer of the TFT layer 31, the diffusion sheet 38 is connected with the light guide plate 24 positioned below the diffusion sheet, and the frame 21 supports the black and white glue 36, the prism 37, the diffusion sheet 38 and the display panel 3 positioned above the frame.

The protective cover 4 supports the frame 21 (particularly, the frame portion below the non-display region B) by transmitting a force through the edge portion 311 of the TFT layer, the fixing paste 35, and the connecting member 7. In other words, the frame 21 is simultaneously subjected to 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 can be neither bent upward nor bent downward. Optionally, an orthographic projection of the first supporting element 5 on the display panel 3 coincides with an orthographic projection of the second supporting element 6 on the display panel 3, so that points of application of the first supporting element 5 and the second supporting element 6 to the frame 21 are completely consistent, when the frame 21 is stressed, a supporting force of the first supporting element 5 to the frame 21 and a supporting force of the second supporting element 6 to the frame 21 do not generate torque, and the frame 21 is prevented from being twisted and deformed, so that a light leakage phenomenon is avoided. Further, since the frame 21 is strongly supported, the diffusion sheet 38 is less likely to float and come off the light guide plate 24, and light leakage in this region is avoided. Optionally, the second supporting element 6 also has a certain elasticity, and particularly, may be made of silicone adhesive, and of course, in other embodiments, the second supporting element 6 may also be made of other materials having elasticity and viscosity.

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

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

The first supporting element 5, the second supporting element 6 and the connecting element 7 act together to absorb the stress of the frame 21 in the vertical direction, so as to avoid the frame 21 from deforming, and inhibit or avoid the offset of the backlight source 22, the light guide plate 24 and other elements, thereby effectively preventing the light leakage problem and being beneficial to improving the display effect of the terminal equipment.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.

Claims

1. A terminal device is characterized by comprising 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 at least part of the projection of the first supporting element on the display panel is located in the non-display area.

2. The terminal device according to claim 1, wherein the first support member has elasticity, and a compression ratio of the first support member is in a range of 40% to 60%.

3. A terminal device according to claim 1, wherein the backlight module comprises a frame and a backlight source, the first supporting element is located between the frame and the housing, and an orthographic projection of the first supporting element on the display panel at least partially coincides with an orthographic projection of the backlight source on the display panel.

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

5. The terminal device according to claim 3, wherein the terminal device comprises a protective cover plate covering the display panel and a second supporting element located between the protective cover plate and the frame, and the protective cover plate supports the frame through the second supporting element.

6. A terminal device according to claim 5, characterised in that the orthographic projection of the first support element on the display panel coincides with the orthographic projection of the second support element on the display panel.

7. The terminal device according to claim 5, 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, and the protective cover supports the frame through the edge portion.

8. A terminal device according to claim 5, characterised in that the first support element is made of foam and the second support element is made of silicone glue.

9. The terminal device according to claim 5, wherein the frame includes a first support portion, a bent portion, and a second support portion arranged along a circumferential direction of the backlight, the first support portion is supported by the housing through the first support member, and the second support portion is supported by the protective cover plate through the second support member.

10. The terminal device according to any one of claims 1 to 9, wherein the terminal device comprises a connecting element, the connecting element comprises a first connecting portion and a second connecting portion, the first connecting portion is used for connecting with the backlight module, and the second connecting portion is used for connecting with the display panel.

11. The terminal device according to claim 10, wherein the first and second connection portions each have an adhesive property, and the adhesive property of the first connection portion is greater than that of the second connection portion.

12. The terminal device according to claim 10, wherein the connection member includes a buffer portion between the first connection portion and the second connection portion, the buffer portion having elasticity.