Search

CN-115210680-B - Touch screen panel with surface friction modification

CN115210680BCN 115210680 BCN115210680 BCN 115210680BCN-115210680-B

Abstract

Embodiments allow for forming a friction modified touch sensitive surface on a touch screen panel. In particular, the touch sensitive surface is enhanced with two friction modifying materials that are interspersed with each other as a monolayer according to a predetermined pattern on the surface of the touch screen panel. In one embodiment, the refractive indices of the materials differ from each other by more than 0.10. In another embodiment, the materials have a dynamic coefficient of friction in one or the other of between 0.01 and 0.05 or between 0.06 and 0.1, respectively, as measured with respect to a printing paper having a dynamic coefficient of friction of 0.17 itself. In another embodiment, the materials have a water contact angle greater than 90 degrees and an oil contact angle greater than 30 degrees, the oil contact angle being measured with n-hexadecane.

Inventors

  • T.A. Rudge
  • S.Ma
  • EMERTON NEIL

Assignees

  • 微软技术许可有限责任公司

Dates

Publication Date
20260505
Application Date
20210126
Priority Date
20200316

Claims (19)

  1. 1. A touch screen panel comprising a friction modified touch sensitive surface, the friction modified touch sensitive surface comprising: an outer surface of the touch screen panel, the outer surface comprising a touch sensitive area; A first friction modifying material, and A second friction modifying material, wherein the first friction modifying material and the second friction modifying material are interspersed with each other according to a predetermined pattern as a monolayer on the outer surface, and wherein the first friction modifying material is relatively more amorphous than the second friction modifying material.
  2. 2. The touch screen panel of claim 1, wherein a difference in refractive index of the first friction modifying material and the second friction modifying material is greater than 0.10.
  3. 3. The touch screen panel of claim 2, wherein the first friction modifying material has a coefficient of dynamic friction between 0.01 and 0.05 and the second friction modifying material has a coefficient of dynamic friction between 0.06 and 0.10, wherein the coefficients of dynamic friction of the first friction modifying material and the second friction modifying material are measured relative to a printed paper having a coefficient of dynamic friction of 0.17 itself.
  4. 4. The touch screen panel of claim 1, wherein the first friction modifying material and the second friction modifying material have a water contact angle greater than 90 degrees.
  5. 5. The touch screen panel of claim 1, wherein the first friction modifying material and the second friction modifying material have an oil contact angle greater than 30 degrees, the oil contact angle measured with n-hexadecane.
  6. 6. The touch screen panel of claim 1, wherein the predetermined pattern comprises a Penrose tiling pattern; White noise patterns; A blue noise pattern, or a plurality of sub-patterns, each sub-pattern being adjacent to at least one other sub-pattern, wherein transitions between adjacent sub-patterns are substantially undetectable.
  7. 7. The touch screen panel of claim 6, wherein the predetermined pattern has a feature size greater than 200 microns.
  8. 8. A method of forming a friction modified touch sensitive surface on an outer surface of a touch screen panel, comprising: Depositing a first friction modifying material layer on the outer surface; Depositing a mask layer on the first friction modifying material layer according to a predetermined pattern; removing the first friction modifying material from an unmasked area of the outer surface; Depositing a second friction modifying material layer on the outer surface, wherein the first friction modifying material is relatively more amorphous than the second friction modifying material, and Removing the mask layer; wherein the first friction modifying material and the second friction modifying material are selected to have a coefficient of dynamic friction in one or the other of between 0.01 and 0.05 or between 0.06 and 0.1, respectively, as measured with respect to a printed paper having a coefficient of dynamic friction of 0.17 itself.
  9. 9. The method of claim 8, wherein a difference in refractive index between the first friction modifying material and the second friction modifying material is greater than 0.1.
  10. 10. The method of claim 8, wherein the first friction modifying material and the second friction modifying material have a water contact angle greater than 90 degrees.
  11. 11. The method of claim 8, wherein the first friction modifying material and the second friction modifying material have an oil contact angle greater than 30 degrees, the oil contact angle measured with n-hexadecane.
  12. 12. The method of claim 8, wherein the predetermined pattern comprises a Penrose tiling pattern; White noise patterns; A blue noise pattern, or a plurality of sub-patterns, each sub-pattern being adjacent to at least one other sub-pattern, wherein transitions between adjacent sub-patterns are substantially undetectable.
  13. 13. The method of claim 8, wherein the layers of the first friction modifying material and the second friction modifying material are deposited as a monolayer.
  14. 14. A touch screen computing device, comprising: A processor; A touch screen panel coupled to the processor and comprising a friction enhanced touch sensitive surface, the friction enhanced touch sensitive surface comprising: an outer surface of the touch screen panel, the outer surface comprising a touch sensitive area; A first friction modifying material, and A second friction modifying material, wherein the first friction modifying material and the second friction modifying material are interspersed with each other according to a predetermined pattern as a monolayer on the outer surface, and wherein the first friction modifying material is relatively more amorphous than the second friction modifying material.
  15. 15. The touch screen computing device of claim 14, wherein a difference in refractive index of the first friction modifying material and the second friction modifying material is greater than 0.1.
  16. 16. The touch screen computing device of claim 15, wherein the first friction modifying material has a coefficient of dynamic friction between 0.01 and 0.05 and the second friction modifying material has a coefficient of dynamic friction between 0.06 and 0.1, wherein the coefficients of dynamic friction of the first friction modifying material and the second friction modifying material are measured relative to a printed paper that itself has a coefficient of dynamic friction of 0.17.
  17. 17. The touch screen computing device of claim 14, wherein the first friction modifying material and the second friction modifying material have a water contact angle greater than 90 degrees.
  18. 18. The touch screen computing device of claim 14, wherein the first friction modifying material and the second friction modifying material have an oil contact angle greater than 30 degrees, the oil contact angle measured with n-hexadecane.
  19. 19. The touch screen computing device of claim 14, wherein the predetermined pattern comprises: Penrose tiling pattern; White noise patterns; blue noise pattern, or A plurality of sub-patterns, each sub-pattern being adjacent to at least one other sub-pattern, wherein transitions between adjacent sub-patterns are substantially undetectable.

Description

Touch screen panel with surface friction modification Background Until relatively recently, keyboard and mouse input devices have been the most common input devices used with computing devices such as PCs. Even touch screen smartphones typically accept text input through a virtual keyboard presented on the touch screen. Recently, however, pen-based input of touch screen devices has become more popular. The high resolution, wide color gamut displays common to some touch screen devices (e.g., microsoft Surface tablet computers) enable complex digital drawing applications that provide accurate emulation of artistic drawings and paintings (i.e., emulation of strokes of pens, pencils, brushes, etc.), particularly when used with a stylus or digital pen. Disclosure of Invention The disclosure is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This disclosure is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter. Touch screen panels, touch screen computing devices, and methods of forming a friction modified touch sensitive surface on a touch screen are described herein. In an example aspect, the external touch-sensitive surface of the touch screen panel is reinforced with a friction modifying material. In an embodiment, the first and second friction modifying materials are interspersed with each other as a monolayer on the surface of the touch screen panel according to a predetermined pattern. In another aspect, the first and second friction modifying materials are selected such that one of the friction modifying materials is relatively more amorphous than the other. In one embodiment, the first and second friction modifying materials are selected to have substantially different refractive indices, wherein the difference in refractive indices is greater than 0.10. In another embodiment, the first and second friction modifying materials are selected to have a dynamic coefficient of friction in one or the other of between 0.01 and 0.05 or between 0.06 and 0.1, respectively, as measured relative to a printing paper that itself has a dynamic coefficient of friction of 0.17. In another embodiment, the first and second friction modifying materials have a water contact angle greater than 90 degrees and an oil contact angle greater than 30 degrees, the oil contact angle being measured with n-hexadecane. In yet another aspect, the first and second friction modifying materials are interspersed with each other according to a predetermined pattern, the predetermined pattern comprising a Penrose tiling pattern, a white noise pattern, a blue noise pattern, or a plurality of sub-patterns, each sub-pattern being adjacent to at least one other sub-pattern, wherein transitions between adjacent sub-patterns are substantially undetectable. Further features and advantages of the examples, as well as the structure and operation, are described in detail below with reference to the accompanying drawings. Note that ideas and techniques are not limited to the specific embodiments described herein. These examples are presented herein for illustrative purposes only. Additional examples will be apparent to those skilled in the relevant art based on the teachings contained herein. Drawings The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments of the present application and, together with the description, further serve to explain the principles of the embodiments and to enable a person skilled in the pertinent art to make and use the embodiments. FIG. 1 depicts a touch screen computing device including a touch screen panel and a stylus suitable for use with the computing device, according to an embodiment. FIG. 2 depicts a schematic elevation view of a display layer and a touch sensor layer of a touch screen panel according to an embodiment. FIG. 3 depicts an example graph of the dynamic coefficient of friction of the change between the stylus and the paper as the stylus moves over the paper, according to an embodiment. Fig. 4a depicts Penrose tile "dart" and "kite" primitives according to an embodiment. Fig. 4b depicts a Penrose pattern generated from the kite and dart of fig. 4a, according to an embodiment. Fig. 4c depicts an enlarged view of the Penrose pattern of fig. 4b, according to an embodiment. Fig. 5a and 5b depict graphs of a white noise pattern and a typical white noise radial power spectrum, respectively, according to an embodiment. Fig. 6a depicts a blue noise tiling pattern according to an embodiment. Fig. 6b depicts a blue noise pattern generated as a 3x3 matrix of the blue noise tiling pattern of fig. 6a, according to an embodiment. FIG. 6c depicts a graph of a typical radial power spectrum of a blue noise pattern according to an embodiment. FIG. 7 depicts a flowchart o