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CN-117121081-B - Display device

CN117121081BCN 117121081 BCN117121081 BCN 117121081BCN-117121081-B

Abstract

The display device (1) is provided with a frame body (2) and an OLED module (3), wherein the frame body (2) is provided with a connecting part (25) for connecting a bending region (24) and an end region on a connecting surface (S2), and when the display surface (S3) of the OLED module (3) is folded inwards, the connecting part (25) stretches the end region of the frame body (2) towards a second direction for folding outwards the display surface (S3) opposite to the first direction after the display surface (S3) is folded inwards.

Inventors

  • TSUCHIDA KENICHIRO

Assignees

  • 夏普显示科技株式会社

Dates

Publication Date
20260512
Application Date
20210514

Claims (12)

  1. 1. A display device is characterized by comprising: frame body and An OLED module supported by the frame and having a plurality of OLED layers laminated via an adhesive, The frame body has: A display unit; A support unit that supports the display unit; A first connecting portion rotatably connecting the display portion and the supporting portion to form a bending region of the frame; A connecting part; a bending part as an end region of the frame body, and A second connecting portion rotatably connecting the display portion and the bending portion, The connecting portion connects the bending region and the bending portion on a connecting surface opposite to a supporting surface supporting the OLED module, wherein the bending region is folded inwards the display surface of the OLED module, When the display surface is folded in, the connecting portion stretches the bending portion in a second direction opposite to the first direction in which the display surface is folded in.
  2. 2. The display device of claim 1, wherein the display device comprises a display device, When the display surface is folded in, the bending portion is bent in the second direction.
  3. 3. The display device of claim 2, wherein the display device comprises a display device, The OLED module includes a fixing member that fixes the OLED module to the frame, and the fixing member is not provided in the bending region in the support surface.
  4. 4.A display device according to claim 2 or 3, wherein the housing has: When the display section is turned around the first connecting section to fold the display surface inward, the bending section can be turned around the second connecting section in the second direction.
  5. 5. The display device of claim 4, wherein the display device comprises a display panel, The connecting portion is provided below the first connecting portion and the second connecting portion.
  6. 6. The display device of claim 4, wherein the display device comprises a display panel, The second connecting part is arranged on the supporting surface of the bending part, A notch is provided in a region of the connecting surface on the opposite side of the second connecting portion.
  7. 7. The display device of claim 4, wherein the display device comprises a display panel, At least one of the first connecting portion and the second connecting portion is a hinge.
  8. 8. The display device according to any one of claim 1 to 3, wherein, The end region of the connecting portion is in an inclined tapered shape.
  9. 9. The display device according to any one of claim 1 to 3, wherein, The connecting part is an SUS plate or a shaft.
  10. 10. The display device according to any one of claim 1 to 3, wherein, The plurality of layers are laminated via a transparent adhesive.
  11. 11. The display device according to any one of claim 1 to 3, wherein, The height of a part of the area between the bending portion and the bending area is higher than the height of other areas of the frame body.
  12. 12. The display device according to any one of claim 1 to 3, wherein, At least a part of the connecting surface except the bending part is provided with a component, The display device further has an exterior portion that wraps the frame, the OLED module, and the member from outside when the display surface is folded in.

Description

Display device Technical Field The present invention relates to a display device. Background In recent years, unlike flat panel display devices, flexible display devices capable of various changes in shape have been developed. The user can easily carry the flexible display device, and thus, the flexible display device can improve user convenience. Examples of the flexible display device include a bendable (bendable) display device that can be bent, a foldable (foldable) display device that can be folded, and a rollable (rollable) display device that can be rolled. For example, patent document 1 describes a foldable display device in which a plurality of layers constituting an OLED module are bonded to each other to define a storage elastic modulus of an adhesive to be bonded. Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 2017-126061 Disclosure of Invention The invention aims to solve the technical problems Here, in general, the layers of the OLED module of the flexible display device as described above are bonded to each other by an adhesive. In this case, if the display device including the OLED module is folded, the sliding (slip) of each layer of the OLED module and the difference in variation (deviation) between layers due to expansion and contraction are generated due to the layer thickness of the OLED module, and as a result, internal stresses such as tensile stress and compressive stress are generated in each layer. In particular, a peeling stress is generated in the layers of the end regions of the OLED module. When the operation of bending the OLED module is repeated, the adhesive that bonds the layers of the OLED module is plastically deformed, and the adhesive force becomes weak, so that the OLED module gradually slides. During this time, compressive stress or tensile stress is continuously applied to each layer of the OLED module, and the dimensions of each layer change, and if there is a dimensional difference between the bonded layers, peeling stress occurs. If the adhesive for bonding the layers of the OLED module cannot alleviate the peeling stress caused by the difference in expansion and contraction between the layers, cracks, peeling, and the like may occur at the interface between the adhesives. In addition, in the case where the layers are firmly bonded by an adhesive, there is a possibility that the layers of the OLED module are peeled off from each other or cracks are generated in the panel. As a result, the appearance quality of the display device may be impaired. Patent document 1 also mentions the inclination of the cross section of the end region of each layer due to the offset between layers that occurs when the folding display device is opened from the closed state. However, if the display device described in patent document 1 does not correct the displacement of each layer due to the sliding and stretching of each layer, the internal stress generated in each layer is not reduced even when the display device is folded. Accordingly, an object of the present invention is to provide a display device capable of reducing internal stress generated in each layer of an OLED module when the display device is folded. Technical scheme for solving technical problems The display device according to one aspect of the present invention includes a frame body and an OLED module supported by the frame body, wherein a plurality of layers including OLED layers are laminated via an adhesive, the frame body includes one or more connecting portions, and the one or more connecting portions connect one or more bending regions of the frame body and at least one end region of the frame body, respectively, on a connecting surface opposite to a supporting surface for supporting the OLED module, in a surface of the frame body, wherein the one or more bending regions of the frame body inwardly bend a display surface of the OLED module, and when the display surface is inwardly bent, the connecting portions stretch the end region of the frame body in a second direction opposite to a first direction in which the display surface is inwardly bent. Advantageous effects It is possible to provide a display device capable of reducing internal stress generated in each layer of an OLED module in the case of bending the display device. Drawings Fig. l is a side view showing an example of the display device of the first embodiment in an open state. Fig. 2 is a side view showing an example of a closing operation of a housing in the display device according to the first embodiment. Fig. 3 is a side view showing an example of the display device of the first embodiment in the closed state. Fig. 4 is a side view showing an example of an opening operation of a housing in the display device according to the first embodiment. Fig. 5 is a side view showing one example of a related art display device in an open state. Fig. 6 is a side view showing an example of a related art display device i