CN113963625A - Foldable display device - Google Patents
Foldable display device Download PDFInfo
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- CN113963625A CN113963625A CN202111248375.6A CN202111248375A CN113963625A CN 113963625 A CN113963625 A CN 113963625A CN 202111248375 A CN202111248375 A CN 202111248375A CN 113963625 A CN113963625 A CN 113963625A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F19/00—Advertising or display means not otherwise provided for
- G09F19/12—Advertising or display means not otherwise provided for using special optical effects
- G09F19/18—Advertising or display means not otherwise provided for using special optical effects involving the use of optical projection means, e.g. projection of images on clouds
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
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Abstract
The embodiment of the invention discloses a foldable display device, which comprises: the projection system comprises at least two display screens and at least one projection module; two adjacent display screens are connected through a projection module, and each display screen is movably connected with the projection module; the projection module comprises a projection screen and a projection lens, and the projection screen comprises a first groove positioned on one side departing from the light-emitting surface; the projection lens is positioned at the first groove; the display picture presented by each display screen and the projection picture emitted by the projection screen are spliced into a complete picture. The embodiment of the invention can ensure that the foldable display device can smoothly and completely display pictures and improve the display effect of the foldable display device on the premise of ensuring longer service life and higher durability of the foldable display device.
Description
Technical Field
The invention relates to the technical field of display, in particular to a foldable display device.
Background
At present, the research on the folding screen mostly depends on an Organic Light-Emitting Diode (OLED) display screen, but repeated bending of the OLED display screen can cause the risk of disconnection and the like in a bending area, so that the problems of short service life and low durability are solved; for a Liquid Crystal Display (LCD), because it is composed of a backlight module and a Liquid Crystal Display panel, it is difficult to realize large-angle bending, and thus it cannot be widely applied to a foldable screen. Therefore, a foldable display device having a long service life and high durability is demanded.
Disclosure of Invention
In view of this, embodiments of the present invention provide a foldable display device, so as to ensure the integrity of a displayed image on the premise of having advantages of long service life and high durability.
An embodiment of the present invention provides a foldable display device, including: the projection system comprises at least two display screens and at least one projection module;
the two adjacent display screens are connected through the projection module, and each display screen is movably connected with the projection module;
the projection module comprises a projection screen and a projection lens, and the projection screen comprises a first groove positioned on one side away from the light emergent surface; the projection lens is positioned at the first groove;
and the display picture presented by each display screen and the projection picture emitted by the projection screen are spliced into a complete picture.
According to the embodiment of the invention, the at least two display screens are movably connected with the at least one projection module, so that the display screens can move by taking the projection module as an axis, the foldable display device can be folded or unfolded, and the circuit and film layer structure in the display screens cannot be influenced, so that the service life of the foldable display device can be prolonged; simultaneously, because two at least display screens are through at least one projection module swing joint, and the projection module comprises the projection screen and the projection lens that sets up in the first recess in the projection screen, this projection lens can be with projection picture to make the projection picture show on the projection screen, the projection picture that the projection screen presented this moment can be a complete picture with the display screen concatenation that the display screen presented, thereby can ensure the integrality that collapsible display screen picture shows, and then be favorable to improving the display effect of collapsible display screen.
Drawings
Fig. 1 is a schematic structural view of a foldable display device of the related art;
fig. 2 is a schematic top view of a foldable display device according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view illustrating a foldable display device according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view illustrating another foldable display device according to an embodiment of the present invention;
fig. 5 is a schematic cross-sectional view illustrating a foldable display device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a partial enlarged structure corresponding to FIG. 5 according to an embodiment of the present invention;
fig. 7 is a schematic cross-sectional view illustrating a foldable display device according to an embodiment of the present invention;
fig. 8 is a schematic top view of another foldable display device according to an embodiment of the present invention;
fig. 9 is a schematic top view of a foldable display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural view of a foldable display device of the related art, and as shown in fig. 1, the foldable display device of the related art includes a bending structure 11 and a display screen 12 located at both sides of the bending structure 11, and the foldable display device is made to implement a foldable function by bending or unfolding the bending structure 11. When the foldable display device displays, the display screens 12 on both sides of the bending structure 11 respectively display corresponding pictures, but the bending structure 11 between the two display screens 12 has no display function, so that the position of the bending structure 11 between the two display screens 12 is a display dark area, thereby destroying the integrity of the pictures displayed by the foldable display device. In the prior art, the supplemental light source 111 is arranged at the position of the bending structure 11 to increase the display brightness at the position of the bending structure 11, but the integrity and the fluency of the whole screen display cannot be ensured.
In view of the above problems, an embodiment of the present invention provides a foldable display device, including: the projection system comprises at least two display screens and at least one projection module; two adjacent display screens are connected through the projection module, and each display screen is movably connected with the projection module; the projection module comprises a projection screen and a projection lens, and the projection screen comprises a first groove positioned on one side departing from the light-emitting surface; the projection lens is positioned at the first groove; the display picture presented by each display screen and the projection picture emitted by the projection screen are spliced into a complete picture.
By adopting the technical scheme, the at least two display screens are movably connected with the at least one projection module, so that the display screens can move by taking the projection module as an axis, the foldable display device can be folded or unfolded, and the circuit and film layer structure in the display screens cannot be influenced, thereby prolonging the service life of the foldable display device; simultaneously, because two at least display screens are through at least one projection module swing joint, and the projection module comprises the projection screen and the projection lens that sets up in the first recess in the projection screen, this projection lens can be with projection picture to make the projection picture show on the projection screen, the projection picture that the projection screen presented this moment can be a complete picture with the display screen concatenation that the display screen presented, thereby can ensure the integrality that collapsible display screen picture shows, and then be favorable to improving the display effect of collapsible display screen.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
It should be noted that, in the embodiment of the present invention, there may be a plurality of display screens in the foldable display device, and there may also be a plurality of projection modules connected to each display screen, so that a complete display picture can be displayed by splicing a plurality of display screens and a plurality of photographing modules together. In order to facilitate description of a specific structure of the foldable display device, without special description, the embodiment of the present invention takes the foldable display device including two display screens and a projection module as an example, and exemplarily describes the technical solution of the embodiment of the present invention.
Fig. 2 is a schematic top view structure diagram of a foldable display device according to an embodiment of the present invention, and fig. 3 is a schematic cross-sectional structure diagram of the foldable display device according to the embodiment of the present invention, and referring to fig. 2 and fig. 3, the foldable display device at least includes two display screens 10 and a camera module 20, and two adjacent display screens 10 are movably connected through the projection module 20; the projection module 20 includes a projection screen 201 and a projection lens 202, the projection screen 201 includes a first groove 2012 located on a side away from the light exit surface 2011; the projection lens 202 is located at the first groove 2012; the display image presented by each display screen 10 and the projection image emitted from the projection screen 201 are spliced into a complete image.
The light emitting surface 2011 of the projection screen 201 is a surface of the projection screen 201 which presents a projection picture and can be observed by human eyes; on the contrary, the side departing from the light exit surface 2011 is the side not displaying the projection picture. Correspondingly, two display screens 10 and camera module 20 swing joint specifically can be two display screens 10 and projection module 20 and rotate and be connected, and two display screens can encircle projection module 20 and rotate this moment, and projection module 20 can be the pivot as display screen 10 this moment. To ensure that the two display screens 10 can rotate around the projection module 20, the projection module can be a cylindrical structure or a structure similar to a cylindrical structure, so as to ensure that the process of rotating the display screens 10 around the camera module 20 is smooth and flexible.
Specifically, referring to fig. 3, the two display panels 10 can be respectively rotated around the projection module 20, so that the foldable display device can assume different states. When the foldable display device is in the unfolded state, that is, when the two display screens 10 are in the state shown by the solid line in fig. 3, the picture displayed by the foldable display device can be divided into three regions, for example, the three regions are respectively a first region, a second region and a third region from left to right, the display picture presented by the leftmost display screen 10 is the picture of the first region, the projection picture emitted by the projection module 20 is the picture of the second region, and the display picture presented by the rightmost display screen 10 is the picture of the third region, so that the display pictures presented by the two display screens 10 and the projection picture emitted by the projection module 20 can be spliced into a complete picture. When the foldable display device is in a folded state, that is, when the two display screens 10 are in a state shown by a dotted line in fig. 3, each display screen 10 in the foldable display device can independently display different pictures, and at this time, the projection picture emitted by the projection module 20 and the display picture displayed by one display screen 10 can form a complete picture to increase the display area of the picture, or the projection module 20 can also be used only as a supplementary light source; or, the picture displayed by the foldable display device can be divided into three regions, which is the same as the display situation when the foldable display device is in the unfolded state, and the description thereof is omitted here. When the foldable display device is in a state between the unfolded state and the folded state, the image presented by each display screen 10 and the projection module 20 can be determined by the included angle between the display surfaces 1011 of the two display screens, for example, when the foldable display device is switched from the unfolded state to the folded state, the included angle between the display surfaces 1011 of the two display screens 10 becomes smaller and smaller, and at this time, along with the change of the included angle between the display surfaces 1011 of the two display screens 10, the display image presented by the two display screens 10 can be gradually changed into two independent display images by one integral image. The display surface 1011 of the display screen 10 is a surface that can be viewed by human eyes and presents a display image, and the orientation of the display surface is the same as that of the light-emitting surface 2011 of the projection module 20.
It can be understood that a corresponding state sensing sensor may be disposed in the foldable display device to obtain the state of each display screen 10, or a linkage structure linked with each display screen 10 is disposed to feed back the state of each display screen 10, so as to adjust the content of the picture presented by each display screen 10 and the projection module 20 according to the state of each display screen 10. At this time, each display screen 10 and the projection module 20 may share one driving chip, and the driving chip distributes data signals to each pixel in each display screen 10 and distributes projection signals to the projection lens 202 in the projection module 20; or, independent driving chips are respectively disposed in each display screen 10 and the projection module 20, at this time, a system motherboard of the foldable display device can respectively distribute data signals to the driving chips of each display screen 10 and the projection module, so that the respective driving chips in the display screens 10 drive the corresponding display screens 10 to display corresponding pictures, and the driving chips in the projection module 20 drive the projection lens 202 to emit corresponding projection pictures, so that each display screen 10 and the projection module 20 can be controlled to display according to the state of the foldable display device.
According to the embodiment of the invention, the at least two display screens are movably connected with the at least one projection module, so that the display screens can move by taking the projection module as an axis, the foldable display device can be folded or unfolded, and the circuit and film layer structure in the display screens cannot be influenced, so that the service life of the foldable display device can be prolonged; simultaneously, because two at least display screens are through at least one projection module swing joint, and the projection module comprises the projection screen and the projection lens that sets up in the first recess in the projection screen, this projection lens can be with projection picture to make the projection picture show on the projection screen, the projection picture that the projection screen presented this moment can be a complete picture with the display screen concatenation that the display screen presented, thereby can ensure the integrality that collapsible display screen picture shows, and then be favorable to improving the display effect of collapsible display screen.
It should be noted that, in the embodiment of the present invention, the material of the projection screen 201 may be a transparent hard screen or a soft screen, and the embodiment of the present invention is not particularly limited, and the number of the projection lenses 202 may be one or more, and on the premise that it can be ensured that, in any form of the foldable display device, the display picture presented by each display screen 10 and the projection picture emitted by the projection film group 20 are spliced into a complete picture, the embodiment of the present invention is also not particularly limited to the number of the projection crystals 202.
Alternatively, as shown with continued reference to fig. 3, when the foldable display device is switched from the unfolded state to the folded state, the projection lens 202 moves to a side away from the projection screen 201 at the first groove 2012; alternatively, when the foldable display device is switched from the folded state to the unfolded state, the projection lens 202 moves to a side close to the projection screen 201 at the first groove 2012.
Specifically, since the light-emitting angle of the projection lens 202 is fixed, the light-emitting angle is the maximum range of the light emitted from the projection lens 202 to the projection screen 201, for example, the light-emitting angle is 120 degrees. Therefore, when the foldable display device is switched from the unfolded state to the folded state, the area of the light exit surface 2011 of the projection screen 201 connecting the two display screens 10 is gradually increased, and in order to ensure that the exit picture of the projection module 20 can still be spliced with the display pictures of the display screens 10 to form a complete picture, the projection lens 202 located at the first groove 2012 can be controlled to gradually move towards the side away from the light exit surface 2011, so that the coverage range is gradually increased after the light rays exiting from the projection lens 202 reach the light exit surface 2011. On the contrary, when the foldable display device is switched from the folded state to the unfolded state, the projection lens 202 can be controlled to gradually move to a side close to the light exit surface 2011, so that the coverage area of the light emitted by the projection lens 202 is gradually reduced after the light reaches the light exit surface 2011. Thus, by controlling the projection lens 202 to move in the first groove 2012, when the foldable display device is in different states, the ranges of the light emitting surfaces 2011 covered by the light emitted by the projection lens 202 are controlled to be different, so as to ensure the integrity and the fluency of the displayed image of the foldable display device.
Optionally, as shown in fig. 3, when the foldable display device is in the unfolded state, two adjacent display screens 10 are in contact with each other, and the display surfaces of the display screens 10 in contact with each other are flush with each other, so that it is ensured that the display surfaces of all the display screens 10 are spliced into a complete display surface when the display device is in the unfolded state, the smoothness of the whole display device is ensured, and it is ensured that the displayed image can have integrity and fluency, thereby improving the display effect.
Optionally, fig. 4 is a schematic cross-sectional structure view of another foldable display device provided in an embodiment of the present invention, and as shown in fig. 4, each display screen 10 includes a backlight module 101, a liquid crystal display panel 102, and a cover plate 103, which are sequentially stacked; a gap is formed between the liquid crystal display panels 102 of two adjacent display screens 10; the cover plate 103 is movably connected with the projection module 20.
The backlight module 101 is used to provide a backlight source for the liquid crystal display panel 102, and may be, for example, a direct-type backlight module or a side-type backlight module; the liquid crystal display panel 102 is used as a display, and at least includes a Thin Film Transistor (TFT) array substrate, a liquid crystal layer, and a Color Filter (CF) substrate, where the liquid crystal layer is usually located between the TFT array substrate and the CF substrate, and applies corresponding driving voltages to liquid crystal molecules at different positions in the liquid crystal layer through TFTs in the TFT array substrate to control the rotation of the liquid crystal molecules in the liquid crystal layer, so that a backlight source provided by the backlight module 101 can pass through the TFT array substrate of the liquid crystal display panel, be refracted out of the liquid crystal layer of the liquid crystal display panel, and generate a Color picture through the CF substrate; the cover plate 103 is used to protect the liquid crystal display panel 102, and may be a rigid Glass plate or a flexible plate made of a flexible material, that is, the cover plate 103 may be, for example, a Glass substrate, a flexible substrate made of transparent Polyimide film (CPI), Ultra-Thin Glass (UTG), or a composite substrate of CPI and UTG, which is not particularly limited in this embodiment of the present invention.
Specifically, a gap is formed between the liquid crystal display panels 102 of two adjacent display screens 10, and is used for accommodating the projection module 20 connecting the two display screens 10; at this moment, can be by apron 103 and the projection module 20 swing joint through in the display screen 10, can guarantee that the display screen folds with under the pivoted prerequisite, need not additionally to increase other connection structure to connect display screen 10 and projection module 20, thereby can simplify collapsible display device's structure, be favorable to reducing collapsible display device's cost and assembly degree of difficulty.
Because the cover plates 103 of the display screens 10 are movably connected with the projection screen 201, when the foldable display device is in the unfolded state, if two adjacent display screens 10 are in contact and the display surfaces of the contacted display screens 10 are flush, the cover plates 103 of the two adjacent display screens 103 are considered to be in contact and the display surfaces of the contacted cover plates 103 are flush; in this case, the cover plate 103 should have a certain thickness to ensure that the side edges of the cover plates 103 of two adjacent display screens 10 can be attached together.
In addition, each display screen 10 can further include an outer frame 104, the backlight module 101 and the liquid crystal display panel 102 are accommodated in the outer frame 104, so that the outer frame 104 can play a certain protection role for the backlight module 101 and the liquid crystal display panel 102, and meanwhile, the outer frame 104 can also be used for supporting the cover plate 102, so that a certain supporting force is provided for the cover plate 103, and the cover plate 103 is prevented from being deformed due to the influence of self gravity.
Optionally, as shown in fig. 4, the light emitting surface 2011 side of the projection screen 201 in each projection module 20 at least includes two arc-shaped side surfaces 20111 which are oppositely arranged; the side edge of the cover plate 103 includes an arc-shaped recess 1031; the arc-shaped side surface 20111 is partially embedded in the arc-shaped groove 1031.
Specifically, two opposite arc-shaped side surfaces 2011 are arranged on the light emitting surface 2011 side of the projection screen 201, and arc-shaped grooves 1031 are arranged on the side edges of the cover plate 103, so that the two arc-shaped side surfaces 201111 on the light emitting surface 2011 side of the projection screen 201 are respectively embedded with the arc-shaped grooves 1031 of the cover plates 10 of the two display screens 10, and the cover plate 103 can rotate along the arc-shaped side surfaces 20111. Therefore, the movable part arranged between the camera module 20 and the display screen 10 can be reduced without additionally arranging a rotating connecting shaft, so that the structure of the small foldable display device is simplified, and the foldable display device has the advantage of miniaturization.
The curvature radius of the arc-shaped recess 1031 may be the same as the curvature radius of the arc-shaped side surface 20111, and the projection screen 201 and the cover plate 103 may be kept in a seamless fit state, so that the integrity of a picture displayed by the foldable display device can be ensured on the premise that the cover plate 103 can rotate more stably and smoothly.
Optionally, fig. 5 is a schematic cross-sectional structure view of another foldable display device provided in the embodiment of the present invention, and as shown in fig. 5, each arc-shaped side surface 20111 extends from the light-emitting surface 2011 to a side away from the light-emitting surface 2011; the arc-shaped side surface 20111 comprises a first arc surface 20111' and a second arc surface 20111 "; when the foldable display device is in the unfolded state, at least part of the first arc surface 20111' is embedded in the arc-shaped groove 1031; when the foldable display device is in the folded state, at least a portion of the second curved surface 20111 ″ is embedded in the curved recess 1031.
So, when the foldable display device is in the unfolding state, at least part of the first cambered surface 20111' is embedded in the arc-shaped groove 1031 of the cover plate 103, and when the foldable display screen 10 is in the folding state, at least part of the second cambered surface 20111 ″ is embedded in the arc-shaped groove 1031, so that no matter the foldable display device is in the unfolding state or the folding state, the cover plate 103 and the projection screen 201 can be tightly attached together, so that a smaller gap is formed between the projection screen 201 and the cover plate 103, miniaturization of the foldable display device is facilitated, and meanwhile, the integrity of a displayed picture can be ensured.
Optionally, the radius of curvature of the first curved surface 20111' is the same as the radius of curvature of the second curved surface 20111 ". In this way, when the foldable display device is switched from the unfolded state to the folded state, the arc-shaped groove 1031 of the cover plate 103 can be smoothly transited from being at least partially embedded into the first arc-shaped surface 20111' to being at least partially embedded into the second arc-shaped surface 20111 ″; alternatively, when the foldable display device is switched from the folded state to the unfolded state, the arc-shaped recess 1031 of the cover plate 103 can be smoothly transited from being at least partially embedded in the second arc-shaped surface 20111 ″ to being at least partially embedded in the first arc-shaped surface 20111'.
Optionally, as shown in fig. 2 and fig. 5, the first arc surface 20111' and the second arc surface 20111 ″ form a first step structure 20112; the perpendicular distance x1 from each point on the first curved surface 20111' to the axis 30 of the projection screen 201 is greater than the perpendicular distance x2 from each point on the second curved surface 20111 "to the axis 30 of the projection screen 201; the axis 30 of the projection screen 201 is parallel to the display surface of the display screen 10 connected to the projection screen 201.
Specifically, a vertical distance x1 from each point on the first arc 20111 ' to the axis 30 of the projection screen 201 is greater than a vertical distance x2 from each point on the second arc 20111 ″ to the axis 30 of the projection screen 201, that is, compared with the first arc 20111 ', the second arc 20111 ″ is recessed toward the side close to the axis 30 of the projection screen 201, so that a first step structure 20112 is formed between the second arc 20111 ″ and the first arc 20111 '; while the foldable display device is in the folded state, the first step structure 20112 can accommodate the cover plate 103 to reduce the overall thickness of the foldable display device in the folded state; meanwhile, when the cover plate 103 is accommodated in the first step 20112, the display surface of the cover plate 103 and the light-emitting surface of the projection screen 201 are kept in a relatively flat state.
Optionally, fig. 6 is a schematic view of a partially enlarged structure corresponding to fig. 5 according to an embodiment of the present invention, and as shown in fig. 5 and fig. 6, the arc-shaped side surface 20111 further includes a connection surface 20111'; the connection surface 20111' ″ includes first and second opposing sides a, b; the first edge a is connected with the first cambered surface 20111 ', and the second edge b is connected with the second cambered surface 20111'; when the foldable display device is in the folded state, the side edge of the cover 103 is in contact with the connection surface 20111' ″, and the display surface of the cover 103 is flush with the first edge a.
Specifically, when the foldable display device is switched from the unfolded state to the folded state, the liquid crystal display panel 102 and the backlight module 101 in each display screen 10 are driven by the cover plate 103 to rotate along the first arc 20111 'until each display screen 10 rotates to the connection surface 20111' ″, the cover plate 103 can move to the side close to the axis along the connection surface 20111 '″ by external force until the arc-shaped groove 1031 of the cover plate 103 is opposite to the second arc 20111 ″, and when at least part of the second arc 20111 ″ is embedded in the arc-shaped groove 1031, the display surface of the cover plate 103 is flush with the first edge a of the connection surface 20111' ″, so that the foldable display device is switched from the unfolded state to the folded state. Similarly, when the foldable display device is switched from the folded state to the unfolded state, the display screens 10 are moved along the connection surface 20111 '″ to the side away from the axis by external force, and then the display screens 10 are rotated along the first arc surface 20111' until the adjacent display screens 10 are contacted, so that the foldable display device is switched from the folded state to the unfolded state.
Thus, when the foldable display device is in the folded state, the cover plate 103 can be completely accommodated in the first step 20112, and the display screen of the cover plate 103 and the light emitting surface of the projection screen 201 can form a smooth surface, so as to prevent the cover plate 103 from protruding compared with the projection screen 201, or the cover plate 103 from being recessed compared with the projection screen 201, which affects the aesthetic property of the foldable display device, and the smoothness and integrity of the displayed image.
Optionally, fig. 7 is a schematic cross-sectional structure view of another foldable display device according to an embodiment of the present invention, and as shown in fig. 7, the light exit surface 2011 side of the projection screen 201 further includes a straight surface 20113 for connecting two arc-shaped side surfaces 20111 that are oppositely disposed. At this time, when the foldable display device is in the unfolded state, it is not necessary to consider whether the adjacent display screens 10 are in contact with each other, and as long as the display surface of the display screen 10 and the flat surface 20113 of the projection screen 201 movably connected with the display screen are kept in a flush state, the foldable display device is ensured to have a flat surface; meanwhile, when the foldable display device is in an unfolded state, two adjacent display screens 10 do not need to be contacted, that is, the cover plates 103 of the two adjacent display screens 10 do not need to be contacted, so that the side thickness of the cover plates 103 does not need to be considered, the cover plates 103 do not need to have larger thickness, the thickness of a single display screen 10 is reduced, and the light and thin foldable display device is further facilitated.
Optionally, as shown with continued reference to fig. 7, each display screen 10 further includes a bezel 104; the outer frame 104 is used for supporting the cover plate 103 and accommodating the liquid crystal display panel 102 and the backlight module 101; a step structure is arranged on one side of the outer frame 104 close to the projection module 20; when the foldable display device is in a folded state, the step structures of two adjacent display screens 10 form a third groove 1041, and the third groove 1041 is opposite to the first groove 2012; the projection lens 202 moves along the first direction Y; when the foldable display device is in the unfolded state, the projection lens 202 is located in the first groove 2012; when the foldable display device is in a folded state, the projection lens 202 is located in the third groove 1041; wherein the first direction Y is a direction intersecting the display surface 1011 of the display screen 10 when the foldable display device is in the unfolded state.
The outer frame 104 can be used for supporting the cover plate 103 and protecting the liquid crystal display panel 102 and the backlight module 101, and the outer frame 104 can be made of metal or glass and has good hardness and wear resistance.
Specifically, to ensure that the foldable display device can display a complete picture in any state, when the foldable display device is in the unfolded state, the area of the light emitting surface 2011 is small, and the light emitted by the projection lens 202 reaches the light emitting surface 2011 and then has a small coverage, at this time, the projection lens 202 can have a small distance from the light emitting surface 2011, so that the projection lens 202 can be located in the first groove 2012; on the contrary, when the foldable display device is in a folded state, the area of the light-emitting surface 2011 is large, the light emitted by the projection lens 202 reaches the light-emitting surface 2011 and then has a large coverage, and at this time, the projection lens 202 has a large distance from the light-emitting surface 2011, so that the projection lens 202 is located in the third groove 1041 formed by the outer frame 104 of the adjacent display screen 10; thus, when the foldable display device is in a folded state, the step structure of the outer frame 104 of the adjacent display screen 10 forms the third groove 1041 to accommodate the projection lens 202, so that a sufficient distance is provided between the projection lens 202 and the light-emitting surface 2011, and it is ensured that the light emitted by the projection lens 202 reaches the light-emitting surface 2011 and then has a large coverage, thereby ensuring the integrity and the fluency of the picture displayed by the foldable display device; meanwhile, when the step structure of the outer frame 104 of the adjacent display screens 10 forms the third groove 1041, the adjacent display screens 10 are arranged back to back, so that the adjacent display screens 10 can lean against each other and support each other, and have higher strength without arranging an additional support structure, which is beneficial to simplifying the structure of the foldable display device and is beneficial to the light and thin design of the foldable display device.
On the basis of the above embodiment, optionally, the length of the projection module in the arrangement direction of the two display screens connected with the projection module is a first length L; the first length L is greater than or equal to the total thickness of two adjacent display screens.
Illustratively, as shown in fig. 7, the first length L is set to be greater than or equal to the total thickness of two adjacent display screens 10, and when the foldable display device is in the folded state, the two adjacent display screens 10 can be oppositely disposed back to back, so that the foldable display device can be in a better folded state, which is beneficial to the folding and unfolding of the foldable display device. Wherein, can set up the gross thickness that first length L is close to two adjacent display screens 10 according to actual conditions, guarantee under fold condition two adjacent display screens 10 can form and support each other to avoid display screen 10 to take place deformation under receiving the exogenic action.
Optionally, fig. 8 is a schematic top view of another foldable display device according to an embodiment of the present invention, and as shown in fig. 8, the camera module 20 at least includes a sensor 203, and the sensor 203 is disposed in the projection screen 201.
Thus, the sensor 203 is arranged in the projection screen 201, so that the arrangement quantity of components in the display screen 10 can be reduced, and the screen occupation ratio of the display screen 10 is improved; meanwhile, since the light emitted by the projection lens 202 has a certain range, when the projection lens 202 is disposed in the projection screen 201 and includes a plurality of projection lenses 202, or when the projection lens 202 includes the projection display element 2021, the projection lenses 202 or the projection display element 2021 are not densely arranged but are dispersedly disposed, and at this time, the sensor 203 can be disposed in an area of the projection screen 201 where the projection lens 202 is not disposed, so that the entire foldable display device has a higher screen occupation ratio.
Illustratively, the sensors 203 may include a camera sensor 2031 and a fingerprint sensor 2032. At this time, if the projection lens 202 includes a plurality of projection display elements 2021 arranged in sequence along the second direction Z, the camera sensor 2031 and the fingerprint recognition sensor 2032 may be respectively located at the head and the tail of the arrangement of the plurality of projection display elements 2021. The second direction Z is a direction intersecting the arrangement direction X of the two display screens 10 connected to the projection module 20 to which the projection lens 202 belongs.
It can be understood that the plurality of projection display elements 2021 are sequentially arranged on the projection module 20 along the second direction Z, so that the light emitted from the projection display elements 2021 can cover all light emitting surfaces of the projection screen 201, thereby avoiding the occurrence of black spots and other phenomena, ensuring the integrity of the projection picture in any state of the foldable display screen, and improving the quality of the projection picture emitted from the projection module 20. Accordingly, the camera sensor 2031 may be used to capture images and be displayed by the foldable display device; the fingerprint recognition sensor 2032 may recognize fingerprint information of a user to perform operations such as screen unlocking, payment, etc. according to the fingerprint information; so, through setting up camera sensor 2031 and fingerprint identification sensor 2032, can enrich collapsible display device's function, promote the user and use experience.
It should be noted that the camera sensor 2031 and the fingerprint recognition sensor 2032 are respectively located at the head and the tail of the arrangement of the plurality of projection display elements 2021, so that the plurality of projection display elements 2021 arranged in sequence may be arranged at equal intervals, or the distance between two adjacent projection display elements 2021 along the second direction Z from the center gradually increases. On the premise of ensuring the integrity of the displayed picture, the embodiment of the present invention does not specifically limit the arrangement manner of each projection display element.
Optionally, fig. 9 is a schematic top view of a foldable display device according to an embodiment of the present invention, and as shown in fig. 9, the sensor 203 includes a plurality of touch sensors 2033; the touch sensor 2033 is used to acquire position information of a touching object on the light exit surface 2011 side of the projection screen 201.
Specifically, the number and the positions of the touch sensors 2033 are not particularly limited in the embodiments of the present invention, and preferably, the touch sensors 2033 and the projection display element 2021 are arranged at intervals to ensure that the touch position can be identified when a touch object (e.g., a stylus, a finger, etc.) touches any position of the light exit surface of the projection screen 201. In this case, each display screen 10 of the foldable display device may be provided with a corresponding touch electrode, etc., when a touch object touches the display surface of the display screen 10, the touch electrode in the display screen 10 may identify the position of the touch object, and when a touch object touches the light exit surface of the projection screen 201, the touch sensor 2033 may identify the position of the touch object. Therefore, all display areas of the foldable display device can be subjected to touch operation, the practicability of the foldable display device is further improved, and the user experience can be improved. The touch sensor 2033 may include an ultrasonic touch chip or an optical touch chip, which is not specifically limited in this embodiment of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (18)
1. A foldable display device, comprising: the projection system comprises at least two display screens and at least one projection module;
the two adjacent display screens are connected through the projection module, and each display screen is movably connected with the projection module;
the projection module comprises a projection screen and a projection lens, and the projection screen comprises a first groove positioned on one side away from the light emergent surface; the projection lens is positioned at the first groove;
and the display picture presented by each display screen and the projection picture emitted by the projection screen are spliced into a complete picture.
2. The foldable display device of claim 1, wherein the projection lens moves at the first recess to a side away from the projection screen when the foldable display device is switched from an unfolded state to a folded state; or, when the foldable display device is switched from the folded state to the unfolded state, the projection lens moves to a side close to the projection screen at the first groove.
3. The foldable display device of claim 1, further comprising: each display screen comprises a backlight module, a liquid crystal display panel and a cover plate which are sequentially stacked;
a gap is formed between the liquid crystal display panels of two adjacent display screens; the cover plate is movably connected with the projection module.
4. The foldable display device of claim 1, wherein when the foldable display device is in an unfolded state, two adjacent display screens are in contact, and the display surfaces of the contacted display screens are flush.
5. The foldable display device of claim 3, wherein the light exit surface side of the projection screen of each projection module comprises at least two arc-shaped side surfaces arranged oppositely; the side edge of the cover plate comprises an arc-shaped groove; the part of the arc-shaped side surface is embedded in the arc-shaped groove.
6. The foldable display device of claim 5, wherein the radius of curvature of the arc-shaped groove is the same as the radius of curvature of the arc-shaped side.
7. The foldable display device of claim 5, wherein each of the curved side surfaces extends from the light exit surface to a side facing away from the light exit surface;
the arc-shaped side surface comprises a first arc surface and a second arc surface; when the foldable display device is in an unfolded state, at least part of the first cambered surface is embedded in the arc-shaped groove; when the foldable display device is in a folded state, at least part of the second cambered surface is embedded in the arc-shaped groove.
8. The foldable display device of claim 7, wherein a radius of curvature of the first arc is the same as a radius of curvature of the second arc.
9. The foldable display device of claim 7, wherein the first arc and the second arc form a first step structure; the vertical distance from each point on the first cambered surface to the axis of the projection screen is greater than the vertical distance from each point on the second cambered surface to the axis of the projection screen; the axis of the projection screen is parallel to the display surface of the display screen connected with the projection screen.
10. The foldable display device of claim 9, wherein said curved side further comprises an attachment surface; the connecting surface comprises a first edge and a second edge which are opposite; the first edge is connected with the first cambered surface, and the second edge is connected with the second cambered surface;
when the foldable display device is in a folded state, the side edge of the cover plate is in contact with the connecting surface, and the display surface of the cover plate is flush with the first edge.
11. The foldable display device of claim 5, wherein the light exit surface side of the projection screen further comprises a flat surface for connecting the two oppositely disposed curved side surfaces.
12. The foldable display device of claim 11, wherein the display surface of the cover panel is flush with a flat surface of the projection screen when the foldable display device is in an unfolded state.
13. The foldable display device of claim 11, wherein each of said display screens further comprises an outer frame;
the outer frame is used for supporting the cover plate and accommodating the liquid crystal display panel and the backlight module; a step structure is arranged on one side of the outer frame, which is close to the projection module;
when the foldable display device is in a folded state, the step structures of two adjacent display screens form a third groove, and the third groove is opposite to the first groove;
the projection lens moves along a first direction; when the foldable display device is in an unfolded state, the projection lens is positioned in the first groove; when the foldable display device is in a folded state, the projection lens is positioned in the third groove; wherein the first direction is a direction intersecting a display surface of the display screen when the foldable display device is in the unfolded state.
14. The foldable display device of claim 1, wherein the length of the projection module in the arrangement direction of the two display screens connected with the projection module is a first length;
the first length is greater than or equal to the total thickness of two adjacent display screens.
15. The foldable display device of claim 1, further comprising: at least one sensor; the sensor is disposed within the projection screen.
16. The foldable display device of claim 15, wherein the sensor comprises a camera sensor and a fingerprint recognition sensor.
17. The foldable display device of claim 16, wherein the projection lens comprises a plurality of projection display elements arranged in sequence along the second direction; the second direction is a direction intersecting with the arrangement direction of the two display screens connected with the projection module to which the projection lens belongs;
the camera sensor and the fingerprint identification sensor are respectively positioned at the head and the tail of the arrangement of the plurality of projection display elements.
18. The foldable display device of claim 15, wherein the sensor further comprises a plurality of touch sensors;
the touch sensor is used for acquiring the position information of a touch object on the light emitting surface side of the projection screen.
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| CN113963625B (en) | 2023-07-07 |
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