背面触控已被sony在做psv的时候申请移动设备专利了，其他厂商要用需要专利费或者打官司。

引用:

原帖由 未定名 于 2015-12-26 08:55 发表
posted by wap, platform: One Plus One
瞎扯，MOTO就做过不少背面触控的手机

没瞎扯，但是查了一下这个背板触控操作的专利还真是被Moto也瓜分过。。。Sony09年提交10年11月获得，Moto 11年6月提交14年获得

Sony的美国专利中
http://www.google.com/patents/US20100299595
权利要求

[0036]
By way of example, and not by way of limitation, content, such as a web page, rendered on a hand held device is decomposed into a number of regions. Each region may be associated with a different active element that is displayed. An entire area of a touch pad on the back of the device may be divided into touch sensitive regions. Each touch sensitive region may correspond to a different active element. The displayed web page can be broken into the active regions for the back touch by performing a Voronoi decomposition on the browser-rendered html canvas. A user can then “select” one of the active elements shown on the front screen by touching the corresponding region on the back touch. Since each area on the back touch is much larger than the displayed active element, the active elements are easier to select using the back touch than with the front touch screen.
[0037]
By way of a more detailed example, content in the form of an html document, such as a web page, may be decomposed into the active regions for the back touch by performing a mathematical decomposition referred to generally as a tessellation on the browser-rendered html canvas. The html canvas determines how the html document is displayed on a screen. The tessellation divides the portion of the document that is to be displayed into a finite number of regions that divide up the area of the screen. Each region corresponds to an active element in the portion of the document that is to be displayed on the screen. According to one embodiment, these regions may be mapped to corresponding touch-sensitive regions of a touch pad. A user can then “select” an active element shown on the front screen by touching the corresponding touch-sensitive region on the touch pad. As a result of the tessellation, each touch-sensitive region may be significantly larger than the corresponding active element displayed on the screen. Consequently, where the screen is a touch screen, the active elements may be easier to select using the touch pad than with the touch screen.

Sony的中国专利中(10年中提交，12年正式获得)
http://www.google.com/patents/CN102439537A
10.权利要求7的设备，其中，所述视觉显示器和触摸板被设置在外壳的不同侧。 10. The apparatus of claim 7, wherein the visual display and the touchpad are arranged on different sides of the housing.
11.权利要求10的设备，其中，所述视觉显示器被设置在外壳的正面上，并且所述触摸板被设置在外壳的背面上。 11. The apparatus of claim 10, wherein the visual display is disposed on the front side of the housing, and the touch panel is disposed on the rear face of the housing.


而Moto的专利http://www.google.com/patents/US8775966
是11年6月提交，14年获批，这期间出的利用该技术的设备都属于Patent pending的状态，但最终也通过了，所以它生产估计也不用付Sony钱。。。。