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Display panel and display device

A display panel and flexible display technology, applied in the direction of identification devices, instruments, etc., can solve the problems of damage to the device layer of the display module, difficulty in restoring a flat state, and large bending stress, and achieve good bending display, reduced strain, and improved performance. The effect of bending properties

Active Publication Date: 2017-10-17
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the overall thickness of the flexible display module is relatively thick, and because the elastic modulus of the HC protective layer is relatively large, when the flexible display module is bent, it is easy to make the neutral layer (that is, the film layer whose stress is 0 during the bending process) ) is far away from the device layer of the display module, which in turn leads to a large bending stress on the device layer (such as the light-emitting device layer) of the entire display module. The device layer of the display module is damaged

Method used

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  • Display panel and display device
  • Display panel and display device
  • Display panel and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a display panel, such as figure 1 with figure 2 As shown, it includes: a flexible display substrate 1 and a protective cover 2, the protective cover 2 is covered on the flexible display substrate 1, the protective cover 2 includes a flexible area 21, and the flexible area 21 is corresponding to the folding area of ​​the flexible display substrate 1, The flexible region 21 is made of a material with an elastic modulus less than 100 MPa and a tensile strength greater than 50 MPa.

[0028] By making the flexible region 21 of the protective cover plate 2 adopt a material with an elastic modulus of less than 100 MPa and a tensile strength greater than 50 MPa, the neutral layer (that is, the film whose stress is 0 during the bending process) can be bent when the display panel is bent. layer) to the device layer in the flexible display substrate 1 (that is, the light-emitting device layer), so that the neutral layer is closer to the device layer in t...

Embodiment 2

[0038] This embodiment provides a display panel, which is different from that in Embodiment 1, such as image 3 As shown, the butt surface of the flexible region 21 and the non-flexible region 22 is formed by splicing more than two planes, and the angle between any two adjacent planes is greater than 0°C and less than 180°C.

[0039]The joint surface formed by splicing two or more planes at a certain angle can disperse the stress of the flexible area 21 and the non-flexible area 22 in the joint area, so that the flexible area 21 and the non-flexible area 22 on the protective cover 2 The stress distribution in the butt joint area tends to be uniform, so that when the display panel is bent, the butt joint area will not cause damage to other film layers in the display panel.

[0040] Preferably, as image 3 As shown, the abutting surface of the flexible region 21 and the non-flexible region 22 is formed by splicing two planes, and the angle α between the two planes is greater th...

Embodiment 3

[0045] This embodiment provides a display device, including the display panel in Embodiment 1 or 2.

[0046] By using the display panel in Embodiment 1 or 2, the bending performance of the display device is improved, so that the display device can achieve better curved display.

[0047] The display device provided by the present invention can be any product or component with OLED display function, such as OLED panel, OLED TV, monitor, mobile phone, navigator, and the like.

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Abstract

The invention provides a display panel and a display device. The display panel comprises a flexible display substrate and a protective cover plate. The display substrate is covered with the protective cover plate, the protective cover plate comprises a flexible area, and the flexible area corresponds to a folding area located on the flexible display substrate, and is made from a material with the elasticity modulus smaller than 100 MPa and the tensile strength larger than 50 MPa. When the display panel is bent, a neutral layer (namely, a film layer with the stress of 0 in the bending process) can move towards a device layer (namely, a luminescent device layer) in the flexible display substrate, and is closer to the device layer in the flexible display substrate accordingly, the stress of the device layer in the flexible display substrate is reduced, the strain after the device layer in the flexible display substrate suffers from the stress effect is further reduced, the display panel is bent and then can further recover the smooth stage in the short time, and finally, damage to all the film layers in the display-panel bending process is reduced or avoided.

Description

technical field [0001] The present invention relates to the field of display technology, in particular, to a display panel and a display device. Background technique [0002] With the development of flexible display screens, people's expectations for foldable display products are getting higher and higher. [0003] At present, flexible display modules usually include HC (hard coating) protective layer, touch screen, polarizer, display screen and other film structures. The HC protective layer generally uses materials with a large elastic modulus to protect the foldable display screen. . At present, the overall thickness of the flexible display module is relatively thick, and because the elastic modulus of the HC protective layer is relatively large, when the flexible display module is bent, it is easy to make the neutral layer (that is, the film layer whose stress is 0 during the bending process) ) is far away from the device layer of the display module, which in turn leads...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09F9/00G09F9/30
CPCG09F9/00G09F9/301
Inventor 李钊史世明
Owner BOE TECH GRP CO LTD
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