System and method for improving impact safety

• US 9,411,452 B2
• Filed: 07/23/2013
• Issued: 08/09/2016
• Est. Priority Date: 08/08/2012
• Status: Active Grant

• Current Assignee: Panasonic Avionics Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Avionics Corporation (Panasonic Holdings Corporation)
• Inventors: Shah, Shrenik, Pitzer, Charles
• Primary Examiner(s): Nguyen, Hoa C
• Assistant Examiner(s): Shrestha, Sagar
• Application Number:
  US13/949,118
• Publication Number:
  US 20150261363A1
• Time in Patent Office: 1,113 Days
• Field of Search: 361/679.01, 36167921-6793, 349 56- 60, 206775-783, 428/15
• US Class Current: 1/1
• CPC Class Codes: B32B 17/06 comprising glass as the main or only constituent of a layer, next to another layer of a specific material
• CPC Class Codes: B32B 17/10009 characterized by the number, the constitution or treatment of glass sheets
• CPC Class Codes: B32B 17/10018 comprising only one glass sheet
• CPC Class Codes: B32B 17/10146 Face treatment, e.g. etching, grinding or sand blasting
• CPC Class Codes: B32B 2457/208 Touch screens
• CPC Class Codes: B32B 27/365 comprising polycarbonates
• CPC Class Codes: B32B 3/02 characterised by features of form at particular places, e.g. in edge regions non-uniform thickness B32B3/263
• CPC Class Codes: B32B 3/263 characterised by a layer having non-uniform thickness
• CPC Class Codes: B60R 11/0235 of flat type, e.g. LCD
• CPC Class Codes: B60R 2011/0012 Seats or parts thereof
• CPC Class Codes: B60R 21/055 Padded or energy-absorbing fittings , e.g. seat belt anchors sun visors B60J3/00; head rests B60N2/80
• CPC Class Codes: C03C 21/002 to perform ion-exchange between alkali ions C03C21/005 takes precedence
• CPC Class Codes: G06F 2203/04102 Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: Y10T 29/49826 Assembling or joining
• CPC Class Codes: Y10T 428/24488 Differential nonuniformity at margin
• CPC Class Codes: Y10T 428/24612 Composite web or sheet
• CPC Class Codes: Y10T 428/31507 Of polycarbonate

Abstract

A system for improving the impact safety and methods for manufacturing and using same. The system includes a panel that comprises a panel surface having a frangible region. The panel can be formed from a translucent material, such as glass. The frangible region is indistinguishable from the remainder of the panel during normal conditions but enables the panel to break in a safe, predictable manner when a predetermined amount of force is applied to the frangible region. Thereby, the panel does not shatter or form sharp shards. Instead, the frangible region breaks away from the panel as an intact unit without internal fracturing. Risk of personal injury thereby can be minimized. The lack of sharp shards likewise facilitates clean up and replacement of the broken panel. The panel advantageously can be applied in video monitors and emergency equipment such as fire extinguisher cabinets disposed aboard passenger vehicles and in stationary environments such as the home or office.

Claims

1. A monitor cover for attachment to a housing in which a monitor having a display is disposed, the monitor cover comprising:

a translucent panel attachable to the housing at two or more points in which the display is visible through the panel;

a frangible region provided in said panel, in which said panel includes an exterior panel surface facing away from the display when the panel is attached to the housing; and

a film disposed over the exterior panel surface,

wherein said frangible region is defined by a notch formed in said panel.

2. The monitor cover of claim 1, wherein the panel includes a perimeter region and the notch is contiguous and disposed proximate the perimeter region.

3. The monitor cover of claim 1, wherein said frangible region is defined by a plurality of notches each formed in said panel.

4. The monitor cover of claim 1, wherein the notch has a cross-sectional shape selected from the group consisting of a triangle, a rectangle, and a semi-circle.

5. The monitor cover of claim 1, wherein the notch varies in at least one of depth and width.

6. The monitor cover of claim 1, wherein said panel is formed from a material selected from the group consisting of toughened glass and polycarbonate.

19. The monitor cover of claim 1, wherein the notch has a cross-sectional shape selected from a group consisting of a triangle, a rectangle, and a semi-circle.

20. The monitor cover of claim 1, wherein a depth of the notch, a width of the notch or both is not uniform.

7. A method for fabricating a monitor cover for attachment to a housing in which a monitor having a display is disposed, the method comprising:

forming a translucent panel attachable to the housing at two or more points in which the display is visible through the panel;

forming a frangible region in the panel in which the panel includes an exterior panel surface facing away from the display when the panel is attached to the housing, the frangible region being defined by a notch formed in the panel; and

disposing a film over the exterior panel surface.

8. The method of claim 7, further comprising toughening the translucent panel.

9. The method of claim 7, wherein said forming the translucent panel comprises using a glass material to form the translucent panel.

10. The method of claim 7, wherein said forming the frangible region comprises notching the panel proximate to a perimeter of the panel.

11. The method of claim 10, wherein said notching comprises forming the notch in the panel having a cross-sectional shape selected from the group consisting of a triangle, a rectangle, and a semi-circle.

12. The method of claim 10, wherein said notching comprises forming the notch varying in at least one of depth and width.

13. The method of claim 7, wherein said forming the frangible region comprises forming a locally limited stress gradient in the panel.

14. The method of claim 7, wherein said forming the frangible region comprises notching the panel proximate a perimeter of the panel in which the notching is contiguous.

15. A frangible panel assembly for covering a video display, the frangible panel assembly comprising:

a housing;

a translucent panel attached to the housing at two or more locations and including an exterior panel surface facing away from the display when said panel is attached to said housing, the display being visible through the panel;

a film disposed over the exterior panel surface;

a frangible region provided in said panel and being defined by a notch formed in said panel; and

a touch sensor disposed on the panel.

16. The frangible panel assembly of claim 15, wherein the touch sensor is translucent.

17. The frangible panel assembly of claim 15, further comprising a film disposed on the panel.

18. The frangible panel assembly of claim 17, wherein the panel is disposed between the film and the touch sensor.