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Rollable display device with strain reduction

A display device, curling technology, applied to devices with multiple man-machine interfaces, branch office equipment, telephone communication, etc.

Active Publication Date: 2007-05-30
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Repeated cycling of the rollable display 30 to radii smaller than the minimum design radius can result in failure of the rollable display 30

Method used

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  • Rollable display device with strain reduction
  • Rollable display device with strain reduction
  • Rollable display device with strain reduction

Examples

Experimental program
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Embodiment Construction

[0020] 4-6 are cross-sectional views of curved portions of strain-reduced rollable displays fabricated in accordance with the present invention, wherein like elements are designated by like reference numerals. Figure 4 provides an example of strain reduction by increasing the radius of the bend. Figures 5 and 6 provide examples of strain reduction by locating the neutral at selected layers of the bend.

[0021] Referring to FIG. 4 , the curved portion 31 of the rollable display includes a first layer 32 , a second layer 34 , and a third layer 36 , which are typically a substrate layer, an electronic device layer, and an electronic ink layer, respectively. In one embodiment, the electronic device layer is the selected fragile layer most in need of strain reduction protection. In alternative embodiments, other layers may also be selected layers. The definition of layers is not limited to discrete layers, but also includes transition layers. For example, the illustrated second...

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Abstract

A rollable display device including an inner housing (102) having an inner slot (108), a rollable display (106) having a bend portion (118), which is disposed through the inner slot (108), and a strain reducer (100) operably connected to the rollable display (106) to reduce strain at the bend portion (118). The strain reducer (100) acts by increasing radius of the bend portion (31), locating a neutral line of the rollable display (106) at a selected layer of the bend portion (31), and / or reducing cycling of the bend portion (31).

Description

technical field [0001] The present invention relates generally to rollable display devices, and more particularly to rollable display devices with reduced strain. Background technique [0002] Recently, improvements in miniaturization and processing power have made electronic devices much more portable. Complex devices have been reduced to pocket size. Consumers are able to carry and use devices such as mobile phones, music players, game consoles, still and motion digital cameras, and GPS locators anywhere they want. However, the size and form factor of these devices are often limited by the optical displays, as most devices currently use non-stretchable glass optical displays. These displays are bulky, fragile and difficult to replace when damaged. [0003] To achieve better portability and avoid the disadvantages of glass optical displays, rollable displays have been developed. 1 is a front view of an exemplary application of a rollable display disclosed in Internation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13G02F1/1333G02F1/167H04M1/02
CPCG09F9/301G06F1/1652H04M1/0268H04M2250/16G02F1/133305G02F1/167
Inventor R·W·L·拉法雷B·J·E·伦斯
Owner SAMSUNG ELECTRONICS CO LTD
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