Liquid crystal display module

Abstract

The invention discloses a liquid crystal display module which comprises a plate shell which comprises two plate shell bodies and a hinge mechanism. The lining plate is provided with a non-folding part and a folding part; the non-folding part is fixedly attached to the two plate shell bodies; the folding part corresponds to the hinge mechanism; the flexible display panel is integrally adhered to the lining plate, the flexible display panel is provided with a non-folding area corresponding to the non-folding part of the lining plate and a folding area corresponding to the folding part of the lining plate, and linearly arranged separation seams are arranged on the outer plate surface of the folding part of the lining plate; the outer plate surface of the lining plate is divided into strips which are arranged in a linear manner and are connected with one another by the separation seams; the folding part of the lining plate is provided with a pre-tightening component, after the flexible display panel is unfolded, the pre-tightening component enables the folding part of the lining plate to generate a bending trend opposite to the folding direction, and the bending trend enables the folding part to resist the folding area of the flexible display panel so as to force the folding area to be flattened.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment, and in particular to a liquid crystal display module of an electronic equipment. Background Art

[0002] Flexible displays have been widely used in computers, mobile terminals and other electronic devices. Figure 1 As shown, the flexible display screen in the prior art generally includes: a flexible display panel 100 located on the inner side, a plate shell 300 located on the outer side, and a backing plate 200 between the flexible display panel 100 and the plate shell 300; for the purpose of folding, the plate shell 300 includes two plate shell bodies, and the two plate shell bodies are connected 400 by a hinge mechanism in the folding area, and the flexible display surface 100 is integrally bonded to the backing plate 200, and the backing plate 200 is configured to be able to bend in the folding area, so that after the electronic device is folded, that is, after the two plate shell bodies are folded, the flexible display panel 100 bends in the folding area along with the backing plate 200.

[0003] The flexible display screen of the above structure in the prior art has the following defects:

[0004] After the lining plate is bent, compressive stress and corresponding compressive strain are generated in the inner area of ​​the lining plate, and tensile stress and corresponding tensile strain are generated in the outer area of ​​the lining plate. The compressive strain in the inner area of ​​the lining plate will cause a dimensional change compared to the unfolded state, and because the thickness of the lining plate is large and the dimensional change is large, the flexible display panel surface and the inner panel surface of the lining plate are separated (debonded). If the flexible display panel surface is debonded from the folding area of ​​the lining plate, this will easily cause the flexible display panel surface and the lining plate to bend in opposite directions, which will lead to: after the flexible display screen is unfolded, the flexible display panel surface will produce a raised crease with a large curvature in the folding area, thereby affecting the appearance and service life.

[0005] In order to prevent the flexible display panel from separating from the backing plate in the folding area, the prior art, such as Figure 1 As shown, a linearly arranged separation seam 201 with a certain depth is configured on the outer panel surface of the lining plate 200 corresponding to the folding area. The configuration of the separation seam 201 is equivalent to reducing the thickness of the lining plate 200 in the folding area, thereby reducing the compressive strain of the inner area of ​​the lining plate 200, thereby reducing the probability of separation between the flexible display panel and the lining plate.

[0006] However, the liner of the above structure may cause the following problems:

[0007] The separation seam 201 causes the liner 200 to have poor reset ability, which makes it difficult for the liner 200 to drive the flexible display panel 100 to flatten in the folding area, especially after the liner 200 is aged and / or folded frequently for a long time, which causes the flexible display panel 100 to have the following problems in the folding area after unfolding: Figure 1 The sunken groove 101 shown affects the display effect and appearance. Summary of the invention

[0008] In view of the above technical problems existing in the prior art, the present invention provides a liquid crystal display module.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0010] A liquid crystal display module, comprising:

[0011] A board shell, comprising two board shell bodies and a hinge mechanism connected between the two board shell bodies;

[0012] A lining plate, which has a non-folding portion respectively attached and fixed to the two plate shell bodies and a folding portion corresponding to the hinge mechanism;

[0013] A flexible display panel is integrally bonded to the backing plate, wherein the flexible display panel surface has a non-folding area corresponding to the non-folding part of the backing plate and a folding area corresponding to the folding part of the backing plate, and a linearly arranged separation seam is arranged on the outer panel surface of the folding part of the backing plate, and the separation seam separates the outer panel surface of the backing plate into linearly arranged and mutually connected strips; wherein:

[0014] The folding part of the backing plate is provided with a pre-tensioning component. After the flexible display panel is unfolded, the pre-tensioning component causes the folding part of the backing plate to generate a bending tendency opposite to the folding direction. The bending tendency causes the folding part to resist the folding area of ​​the flexible display panel and force the folding area to flatten.

[0015] Preferably, the pre-tightening component includes a pre-tightening unit respectively arranged in each of the separation gaps, and after the flexible display panel is unfolded, each of the pre-tightening units is used to apply force to the slats on both sides of the separation gap so that the slats on both sides tend to approach each other.

[0016] Preferably, the pre-tensioning unit comprises elastic arms which are opposite to and connected to each other.

[0017] Preferably, an integrally connected arc-shaped connecting portion is arranged between the two elastic arms of each pre-tensioning unit, and the two elastic arms and the arc-shaped connecting portion form a teardrop-shaped appearance; the outer end of the elastic arm is bent in the opposite direction and buried in the folded part of the lining plate.

[0018] Preferably, each of the pre-tightening units comprises two magnetic sheets; the two magnetic sheets are respectively attached to two side walls of the separation gap, and magnetic attraction is formed between the two magnetic sheets.

[0019] Preferably, the pre-tightening component comprises at least one elastic thread, and the elastic thread comprises spiral segments and straight segments arranged alternately; the elastic thread is buried in the folded portion of the lining plate, and at least one spiral segment is arranged between every two of the slats.

[0020] Preferably, there are two spiral sections between each two adjacent slats; wherein:

[0021] Each of the two adjacent slats is provided with a receiving hole, and the two spiral segments are respectively located in the two receiving holes.

[0022] Preferably, the elastic thread comprises a plurality of elastic threads, and the plurality of elastic threads are arranged at intervals along the width direction of the folded portion of the lining plate.

[0023] Preferably, the elastic modulus of the folded portion of the lining plate is smaller than the elastic modulus of the unfolded portion of the lining plate.

[0024] Preferably, the hinge mechanism comprises a plurality of linearly arranged wedge-shaped bars, and every two adjacent wedge-shaped bars are hingedly connected to each other.

[0025] The beneficial effects of the liquid crystal display module provided by the present invention are:

[0026] The liquid crystal display module provided by the present invention can significantly suppress the generation of sinking grooves in the folding area of ​​the flexible display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the embodiments of the invention. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

[0028] Figure 1 The figure is a schematic diagram of the structure of a flexible display screen in the prior art.

[0029] Figure 2 A main cross-sectional view of a folded portion of a liner plate of a specific structure provided by the present invention.

[0030] Figure 3 This is a main cross-sectional view of a liquid crystal display module with a specific structure provided by the present invention.

[0031] Figure 4A main cross-sectional view of a folded portion of a liner plate of another specific structure provided by the present invention.

[0032] Figure 5 This is a main cross-sectional view of a liquid crystal display module of another specific structure provided by the present invention.

[0033] Figure 6 A main cross-sectional view of a folded portion of a liner plate of another specific structure provided by the present invention.

[0034] Figure 7 A top view of a folded portion of a liner plate of another specific structure provided by the present invention.

[0035] Figure 8 The present invention provides a schematic structural diagram of a hinge mechanism of a specific structure.

[0036] Reference numerals:

[0037] 10-flexible display panel; 11-non-folding area; 12-folding area; 20-lining plate; 21-non-folding part; 22-folding part; 221-dividing seam; 2211-passivation part; 222-slat; 2221-accommodating hole; 30-board shell; 31-board shell body; 41-pretensioning unit; 411-elastic arm; 412-arc-shaped connecting part; 413-magnetic sheet; 42-elastic thread; 421-spiral segment; 422-straight segment; 50-hinge mechanism; 51-wedge strip. DETAILED DESCRIPTION

[0038] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] In order to keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and well-known components are omitted.

[0040] like Figures 2 to 7As shown, an embodiment of the present invention discloses a liquid crystal display module, which can be applied to electronic devices such as flexible displays and foldable mobile phones. The liquid crystal display module includes: a plate shell 30, a liner 20 and a flexible display panel 10. The materials selected for the plate shell 30, the liner 20 and the flexible display panel 10 are materials known in the prior art and will not be described in detail.

[0041] like Figure 2 As shown, the board shell 30 includes two board shell bodies 31, and the two board shell bodies 31 are connected by a hinge mechanism 50, so that the two board shell bodies 31 can be folded by the hinge mechanism. Figure 8 As shown, the hinge mechanism 50 includes a plurality of linearly arranged wedge-shaped bars 51 , and each two adjacent wedge-shaped bars 51 are hingedly connected to each other.

[0042] The lining plate 20 includes two non-folding parts 2221 and a folding part 22 between the two non-folding parts 2221; the two non-folding parts 2221 are respectively fixed on the inner sides of the two plate shell bodies 31, and the folding part 22 basically corresponds to the area where the hinge mechanism 50 is located, and the folding part 22 is configured as an elastic structure capable of elastic reset. Preferably, the non-folding part 2221 is also configured as an elastic structure. Preferably, the elastic modulus of the non-folding part 2221 is greater than the elastic modulus of the folding part 22, that is, the rigidity of the non-folding part 2221 is greater than the rigidity of the folding part 22.

[0043] In some preferred structures, two types of plates with different elastic moduli are used to respectively form the non-folding portion 2221 and the folding portion 22 of the lining plate 20, so that the two different plates are composited to form the lining plate 20.

[0044] In some preferred structures, when the two plate shell bodies 31 are in the unfolded state, a certain gap in the thickness direction is provided between the lining plate 20 and the hinge mechanism 50, so as to prevent the folding area 12 of the lining plate 20 from being severely squeezed with the hinge mechanism 50 due to bending deformation after the two plate shell bodies 31 are folded.

[0045] The flexible display panel 10 includes two non-folding areas 1211 and a folding area 12 between the two non-folding areas 1211. The two non-folding areas 1211 of the flexible display panel 10 correspond to and are attached to the two folding parts 22 of the backing plate 20, respectively. The folding area 12 of the flexible display panel corresponds to and is attached to the folding part 22 of the backing plate 20. Figure 5 As shown, after the two plate shell bodies 31 are folded, the folding area 12 of the flexible display panel 10 is bent and deformed along with the folding part 22 of the backing plate 20 to achieve folding, and after the two plate shell bodies 31 are unfolded, the folding area 12 of the flexible display panel surface is unfolded along with the folding part 22 of the backing plate 20.

[0046] like Figure 2 As shown, a plurality of linearly arranged separation slits 221 are arranged outside the folding portion 22 of the backing plate 20, and the depth of the separation slits 221 is less than the thickness of the backing plate 20, so that the separation slits 221 divide the folding portion 22 of the backing plate 20 into a plurality of linearly arranged and mutually connected slats 222. In this way, during the folding process of the two plate shell bodies 31, the compressive strain generated on the inner side surface of the backing plate 20 is small, so that the folding area 12 of the flexible display panel 10 can be effectively prevented from being separated from the folding portion 22 of the backing plate 20, thereby preventing the flexible display panel 10 from bulging in the folding area 12 after the two plate shell bodies 31 are unfolded.

[0047] However, if the folding area 12 of the backing plate 20 is only provided with the separation seam 221 without taking other measures, after the flexible display panel 10 is unfolded with the two plate shell bodies 31, the backing plate 20 is difficult to return to a flat state due to the separation seam 221, resulting in the folding area 12 of the flexible display panel 10 being deformed as shown in FIG. Figure 1 The "sinking groove" shown.

[0048] In order to prevent the folding area 12 from generating a "sinking groove" after the flexible display panel is unfolded, in the present invention, a pre-tightening component is provided on the folding portion 22 of the lining plate 20. After the flexible display panel 10 is unfolded, the pre-tightening component causes the folding portion 22 of the lining plate 20 to generate a bending tendency opposite to the folding direction.

[0049] The bending tendency opposite to the folding direction should be understood as: Figure 2 As shown, when the folded portion 22 of the backing plate 20 is in a free state, for example, when the two plate shell bodies 31 are in an unfolded state, assuming that the folded area 12 of the flexible display panel 10 is not in contact with the folded portion 22, the pre-tightening component will make the folded portion 22 appear as shown in FIG. Figure 2 The reverse curved arc segment shown only exerts an outward force in the thickness direction on the folded portion 22 (according to Figure 2 As shown, the folded portion 22 will be flattened only after a downward force is applied. Figure 3 As shown, when the folded portion 22 is in a flattened state, the pre-tensioning component causes the strips 222 to have a tendency to approach each other, thereby causing the folded portion 22 to have a bending tendency opposite to the folding direction.

[0050] Based on the above, we can know that:

[0051] After the flexible display panel 10 is unfolded with the two plate shell bodies 31, the folding area 12 of the flexible display panel 10 applies an outward force in the thickness direction to the folding portion 22 of the liner 20, thereby forcing the folding portion 22 to flatten. The folding portion 22 tends to flatten and generates a reverse bending trend. The reverse bending trend can prevent the folding area 12 of the flexible display panel 10 from forming a "sinking groove", such as Figure 3 As shown, the folding area 12 and the folding portion 22 are basically in a flattened state.

[0052] The present invention provides a pre-tightening component formed by two structures.

[0053] The first structural form of the preloaded component.

[0054] The pre-tensioning component includes a pre-tensioning unit 41 respectively arranged in each partition gap 221. After the flexible display panel 10 is unfolded, each pre-tensioning unit 41 is used to apply force to the slats 222 on both sides of the partition gap 221 so that the slats 222 on both sides tend to approach each other, thereby causing the folded portion 22 of the lining plate 20 to produce a reverse bending tendency.

[0055] In this structural form, the present invention provides two specific structures of the pre-tensioning unit 41 .

[0056] A pre-tensioning unit 41 of the first structure.

[0057] like Figure 2 and Figure 3 As shown, each pre-tensioning unit 41 includes two elastic arms 411, and the two elastic arms 411 are integrally connected. After the flexible display panel 10 is flattened, the two elastic arms 411 have a tendency to approach each other due to a slight increase in the opening angle compared to the free state, so that each adjacent two slats 222 have a tendency to approach each other. Preferably, an integrally connected arc-shaped connecting portion 412 is arranged between the two elastic arms 411 of each pre-tensioning unit 41, and the two elastic arms 411 and the arc-shaped connecting portion 412 form a teardrop shape; the outer end of the elastic arm 411 is reversely bent and buried in the folding portion 22 of the lining plate 20, so that the elastic deformation of the two elastic arms 411 with an increased opening angle occurs at the arc-shaped connecting portion 412, avoiding elastic deformation at the elastic arm 411, and preventing stress concentration at the top of the separation seam 221.

[0058] A pre-tensioning unit 41 of a second structure.

[0059] like Figure 4 and Figure 5As shown, the pre-tensioning unit 41 includes two magnetic sheets 413; the two magnetic sheets 413 are respectively attached to the two side walls of the partition slit 221, and a magnetic attraction is formed between the two magnetic sheets 413. The magnetic attraction between the two magnetic sheets 413 is used to make the two adjacent slats 222 tend to approach each other. The advantage of configuring the pre-tensioning unit 41 as two magnetic sheets 413 is that compared with the above-mentioned mechanical elastic arm 411, the tendency of the two slats 222 to approach each other will not disappear due to mechanical fatigue, and the magnetic sheets 413 are easier to manufacture and easier to install on the side walls of the partition slit 221. Preferably, a passivation portion 2211 is processed at the bottom of the partition slit 221, and the passivation portion 2211 can prevent stress concentration.

[0060] The second structural form of the preload component.

[0061] like Figure 6 and Figure 7 As shown, the pre-tightening component includes a plurality of elastic threads 42 arranged at intervals along the width direction of the flexible display panel 10, and the elastic threads 42 include spiral segments 421 and straight segments 422 arranged alternately; the elastic threads 42 are buried in the folding portion 22 of the liner 20, and at least one spiral segment 421 is arranged between every two slats 222. Preferably, there are two spiral segments 421 between every two adjacent slats 222; each adjacent two slats 222 are arranged with a receiving hole 2221, and the two spiral segments 421 are respectively located in the two receiving holes 2221. In this way, the tendency of each two slats 222 to approach each other is provided by the elastic deformation of the spiral segment 421 of the elastic thread 42. The advantage of the pre-tightening component of this structure is that when the folding portion 22 of the liner 20 is manufactured by injection molding, the elastic thread 42 is simultaneously buried in the folding portion 22, that is, the folding portion 22 and the elastic thread 42 are integrally formed. In addition, the forces applied by the numerous elastic threads 42 to the slats 222 in the width direction are more uniform and the manufacturing cost of the elastic threads 42 is lower.

[0062] In addition, although exemplary embodiments have been described in the present invention, the scope includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., various embodiments intersecting schemes), adaptations or changes. The elements in the claims will be interpreted broadly based on the language adopted in the claims, and are not limited to the examples described in this specification or during the implementation of this application, and their examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered as examples only, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.

[0063] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. For example, a person of ordinary skill in the art can use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features can be grouped together to simplify the present invention. This should not be interpreted as an intention that a disclosed feature that is not required to be protected is necessary for any claim. On the contrary, the subject matter of the present invention may be less than all the features of a specific disclosed embodiment. Thus, the following claims are incorporated into the specific embodiments as examples or embodiments, wherein each claim is independently used as a separate embodiment, and it is considered that these embodiments can be combined with each other in various combinations or arrangements. The scope of the present invention should be determined with reference to the attached claims and the full scope of equivalent forms granted by these claims.

[0064] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A liquid crystal display module, characterized in that: include: A board shell, comprising two board shell bodies and a hinge mechanism connected between the two board shell bodies; A lining plate, which has a non-folding portion respectively attached and fixed to the two plate shell bodies and a folding portion corresponding to the hinge mechanism; A flexible display panel is integrally bonded to the backing plate, wherein the flexible display panel surface has a non-folding area corresponding to the non-folding part of the backing plate and a folding area corresponding to the folding part of the backing plate, and a linearly arranged separation seam is arranged on the outer panel surface of the folding part of the backing plate, and the separation seam separates the outer panel surface of the backing plate into linearly arranged and mutually connected strips; wherein: The folding part of the backing plate is provided with a pre-tensioning component. After the flexible display panel is unfolded, the pre-tensioning component causes the folding part of the backing plate to generate a bending tendency opposite to the folding direction. The bending tendency causes the folding part to resist the folding area of ​​the flexible display panel and force the folding area to flatten.

2. The liquid crystal display module according to claim 1, characterized in that: The pre-tightening component includes a pre-tightening unit respectively arranged in each of the separation gaps. After the flexible display panel is unfolded, each of the pre-tightening units is used to apply force to the slats on both sides of the separation gap so that the slats on both sides tend to approach each other.

3. The liquid crystal display module according to claim 2, characterized in that: The pre-tensioning unit includes elastic arms that are opposite to and connected to each other.

4. The liquid crystal display module according to claim 3, characterized in that: An integrally connected arc-shaped connecting portion is arranged between the two elastic arms of each pre-tightening unit, and the two elastic arms and the arc-shaped connecting portion form a teardrop-shaped appearance; the outer end of the elastic arm is bent in the opposite direction and buried in the folded part of the lining plate.

5. The liquid crystal display module according to claim 2, characterized in that: Each of the pre-tightening units includes two magnetic sheets; the two magnetic sheets are respectively attached to two side walls of the separation gap, and magnetic attraction is formed between the two magnetic sheets.

6. The liquid crystal display module according to claim 1, characterized in that: The pre-tightening component includes at least one elastic thread, and the elastic thread includes spiral segments and straight segments arranged alternately; the elastic thread is buried in the folded part of the lining plate, and at least one spiral segment is arranged between every two of the slats.

7. The liquid crystal display module according to claim 6, characterized in that: There are two spiral sections between each two adjacent slats; wherein: Each of the two adjacent slats is provided with a receiving hole, and the two spiral segments are respectively located in the two receiving holes.

8. The liquid crystal display module according to claim 7, characterized in that: The elastic threads include a plurality of elastic threads, and the plurality of elastic threads are arranged at intervals along the width direction of the folded portion of the lining plate.

9. The liquid crystal display module according to claim 1, characterized in that: The elastic modulus of the folded portion of the liner is smaller than the elastic modulus of the unfolded portion of the liner.

10. The liquid crystal display module according to claim 1, characterized in that: The hinge mechanism comprises a plurality of linearly arranged wedge-shaped bars, and each two adjacent wedge-shaped bars are hinged to each other.

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