月度存档: 二月 2012

表面光波多点触控

表面光波多点触控技术主流技术对比技术特点技术概述
技术概述
表面光波技术(Surface Light Wave)是天时通独有的一种全新的多点触控技术,它主要是利用某一波段的光波传播特性,结合光波发射电路,使光波在触摸屏表面形成一个错综复杂的密致表面光波网络,当有触点进入这个表面光波网络,光波网络受到破坏,犹如一个很密的渔网被戳破几个黑洞,我们称之为“破网”现象,信号接收电路会接收到整个光波网络的破坏信号,通过分析光波“破网”程度,从而实现多触点识别。表面光波技术(Surface Light Wave)是真正意义上的多点触控的技术,可以实现2点,10点,16点,32点以上的触控,无需更改液晶工艺即可将任意液晶显示器变成多点触控显示器。

技术特点
真多点触控

表面光波多点触控技术是真正支持10点以上的触控技术,并可根据需要扩大触控点数量(16、32点)。国内很多支持多点的触控屏其实只支持2点,且容易产生伪点,并非真正的多点触控。表面光触控是国内首个支持32点的多点触控技术。

支持触控物体形状识别,可以扩展更多应用

普通红外触摸屏采用的定位方式是x、y方向扫描方式,这种方式只能得到遮挡物的中心坐标,不能描述出遮挡物的轮廓,而表面光波能够描述出与屏幕接触物体的大致轮廓,这是其他所有触控技术不能比的。而且可以扩展更多应用。比如可以识别手掌跟手指的触控为不同触控。

高响应速度

响应速度小于10ms,比普通的触摸屏的响应速度更快。

适用于19-100寸的液晶使用

电路设计采用模组的方式设计,从19寸至100寸范围内,可以任意拼接,让其提供的解决方案有更多的可能。

无需导电玻璃基板,无需微型光学摄像头
表面光多点触控技术不需要导电玻璃基板,表面无任何介质,透光率可达92%(无玻璃的情况下为100%),对显示效果无任何影响。且不受微型光学摄像头此等精密仪器的限制。

无压力触控,支持手、笔等任何不透光的物体操作
无需触控压力,仅用手、笔或任何不透光的物体轻轻滑动即可操作,更不需要电磁或电容笔。

无需校正,无漂移现象
触控精确,可识别的最小点大小为2mm*2mm *,且无漂移现象。若没有感应器与液晶屏相对位置的变化,则不需要校正。

技术参数
触控技术
表面光波多点触控技术(Surface Light Wave)
触控压力
零压力
透光率
大于92%(如无玻璃透光率为100%)
触控物理分辨率
1414 x 798 *
报告分辨率
32767 x 32767
最小识别点大小
2mm×2mm *
最小触点移动检测
3mm
表面耐久性
7H
抗恶劣环境
冗余度极高,20%传感器损坏下,仍可保持多点触控
触控点识别
触控点2点,6点,10点,16点,32点
工作电压
5.0V(内部电压3.3V)
平均电流
<200mA
功耗
1W
最高电流
<350mA
休眠电流
<10mA
响应速度
≤10ms
接口
USB 2.0 HID模式
扫描速率
100帧/秒
受干扰情况
无静电干扰,漂移现象
寿命
单个传感器连续工作: 5000小时
分时工作。整机连续寿命: 5000小时 x 200
在节能模式下,还可以提高10倍工作寿命(长时间无触控情况下,低速运行)
触控次数:没有机械结构,等同电容屏2亿次
物体形状识别
支持
触控方式
手指,笔 (非电容、电磁笔)
支持平台
Windows 7 ,Windows Vista , Windows XP
软件接口协议
TUIO 协议(UDP模式), TUIO Adobe Flash模式(TCP模式)
Windows 7 Multitouch HID协议
通常适用液晶尺寸
19 - 100寸
湿度范围
工作\存贮湿度:90%RH在40℃无结露
温度范围
工作温度:0℃~50℃
存贮温度:-40℃~85℃
*
根据具体尺寸,参数可能有所不同

主流技术对比
表面光触控与光学触控对比
光学式触控
采用两个CMOS/CCD摄像头,接收红外反射条数据,通过计算触控点在反光条上的数据,从而得到触控坐标。

表面光波相较于光学式触控技术的优势
1、光学式触控由于原理缺陷,只能做到2点触控,并会产生误判, 有10%以上的区域只能当单点使用。虽然可通过增加摄像头的方式扩展至3至4个点,但其误判问题仍然时常存在。
表面光波技术可以轻松实现2点,10点,16点,32点以上的触控。

2、光学式触控由于使用了摄像头,所以致使其边框会很高。
表面光波技术的模组,厚度只有5mm,最薄款甚至可以达到3mm。

3、光学式触控由于使用了反光条,很容易受污垢灰尘等遮挡,使用一段时间后就容易出现触控失灵,对反光条的不当擦拭也容易照成触控失灵,尤其在教室等经常使用粉笔的情况环境下更为严重。
表面光波技术无需反光条,在现有几种触控技术中,表面光波技术是对粉尘,划伤等问题解决最好的触控方案,用名片挡住部分光波,在被挡住的区域仍可正常触控。

4、中小尺寸的光学式触控产品因其产能有限,价格昂贵,除HP,Dell外,大多厂家只是发布了多点触控产品型号,但市场上均无法采购到。
天时通现有国内首条多点触控产品生产线,能大批量生产多点触控产品。

表面光波触控与红外触控对比
红外线触控
红外线触摸屏,一般是在显示器屏幕的前面安装一个外框,外框里有电路板,在X、Y方向有排布均匀的红外发射管和红外接收管,对应形成横竖交的红外线矩阵。当有触摸时,手指或其它物体就会挡住经过该点的横竖红外线,由控制器判断出触摸点在屏幕的位置。

表面光波相较于红外触控技术的优势
1、 红外触控技术不能实现真正意义上的多点,只能通过分时技术实现伪2点触控,使用伪多点技术实现的2点以上的情况使用效果极差,伪点假点多,当多点同时按下时,该技术也无法工作,俗称1.5点触控技术。由于先天技术缺陷,也无可能通过升级实现多点。
表面光波技术可以轻松实现2点,10点,16点,32点以上的触控。

2、 分辨率高。物理分辨率一般只有300*300左右,通过插值法,报告分辨率4096*4096,但划斜线通常有阶梯现象。
表面光波技术物理分辨率可达1414*798,报告分辨率可以达到32535*32535,手指轻微抖动都能分辨的出来。

3、能识别笔尖触控。 红外触控技术一般只能识别6mm以上的较粗不遮盖物体,对较细的物体触控基本上工作不正常的,
表面光波技术独有的笔尖识别技术可以识别最细2mm的物体触控,在我们的21.5寸触控屏上,甚至可以支持普通2B铅笔芯进行触控,该项技术即使在昂贵的电容屏上也无法实现。

4、 支持形状识别。 红外触控技术无法分辨具体的形状。
表面光波技术可以支持形状识别,例如水杯和手机,并支持同时识别多个物体。

5、 冗余度高。 红外触控技术当有一个红外管坏了,就可能造成整个触控屏无法工作。
表面光波技术在20%的传感器损坏情况下仍能实现多点触控。

6、 抗干扰能力强。 红外触控技术,无法适应强光环境。
表面光波技术采用新式的抗干扰设计,可以实时动态适应强光环境。

其他主流技术概述
电阻式
电阻式是最常见的触控技术。电阻式触控屏在显示器表面使用一组控制器和特殊涂层的玻璃,以产生触控连接信号。触控屏幕面板有两层薄薄的导电膜,其间以细缝隔开。当手指等触控物件在面板表面某个点进行触压时,两片导电层将相互连结,导致电流产生变化,进而检测到触控动作。
电阻式覆膜主要可区分为四线式、五线式与八线式。五线式与八线式技术的制造与调校成本较高,但四线式的影像清晰度较低。
一般有两种功能选项:抛光或抗眩光。抛光可提供清晰的影像,但通常会引发眩光。抗眩光可将眩光程度降至最低,但同时因使光线散射而造成清晰度下降。
电阻式触控屏的优点是:它成本相对低廉(对小型屏幕来说),可使用多种类型的输入工具,如手指(戴或不戴指套)、触控笔或硬质物品等工具进行操作。
电阻式触控屏的缺点有:在公共环境下的应用效能不高,原因是影像清晰度不足,需要定期调校以防电阻薄膜层失效,而且容易被刮坏。而在电阻层受到切割或刮损时,将无法正常接收触控动作。至今尚未实现多点。

电容式
电容式触控屏是主流的多点触控技术,采用全玻璃式设计,荧幕上流动着细微电流,荧幕四个角落的电路板会估算触控覆膜所引发的电容量。触碰荧幕时会中断电流,引发电容变化,进而检测到触控动作。电容式触控技术以APPLE的投射电容式最为突出。
投射电容式触控屏的优点是:由于挂载于显示器的玻璃与边框可以密封,因此它具有耐久性且防水防尘。它亦能实现多点触控。
投射电容式触控屏的缺点有:生产工艺要求高,成本高。由于其生产工艺的难度与屏幕的尺寸大小成几何增加,因此它不适合制作大尺寸的触控屏,且可能需要定期调校。电容式触控屏只能通过人类手指的触控来加以启动。 其清晰度较之电阻式触控技术有改善,但仍存在清晰度不高的问题。

表面声波(SAW)
表面声波技术使用超音波穿透触控屏幕面板。触碰面板时,部分声波将被吸收。对超音波造成的变化会换算出触控事件发生的位置,然后该信息会传送至控制器进行处理。
表面声波的优点是:因为其使用纯玻璃结构,与电阻式、电容式技术相比,表面声波技术可提供绝佳的影像清晰度、解析度及较高的透光性。
表面声波的缺点有:这项技术原先是针对较小尺寸荧幕所设计,所以不便应用于超过30寸的荧幕尺寸。由于该技术无法加以封装,容易受到表面脏污及水分的破坏,因此不适用于许多工业及商业应用产品。表面脏污会导致屏幕上产生暗点,需要定期清洁感应器及不定期进行调校。 基于技术本身的运作方式,使其同时也难以避免受到不必要的干扰,如外部声音的干扰。

技术参数对比

表面光波多点(SurfaceLight Wave)
电容屏
电阻屏
红外式
触摸压力
零压力
零压力
100克力
零压力
透光率
大于92%(如无玻璃透光率为100%)
88% 75% 大于92%
触摸物理分辨率
1414 x 798 * 1000 x 1000 4096 x 4096 300 x 200
报告分辨率
32767 x 32767 4096 x 4096 4096 x 4096 4096 x 4096
最小识别点大小
2mm×2mm * 4mm x 4mm 1mm x 1mm 5mm×5mm
最小触点移动检测
3mm 1mm 1mm 5mm
表面耐久性
7H 6.5H 3H 7H
抗恶劣环境
冗余度极高,20%传感器损坏下,仍可保持多点触控 怕指甲或硬物敲击 表面容易划伤 一旦有坏管,触摸立刻失灵
触摸点识别
最大48点 最大支持10点 两点或模糊手势 最多支持2点
工作电压
3.3 -5.0V 1.8 -5.0 V 1.8 -5.0V 5.0V
平均电流
<100mA <50mA <100uA <300mA
休眠时电流
<10mA <1mA 无 无
响应速度
≤10ms 20ms 10ms 16ms
接口
USB 柔性电路板 COM, USB USB,PS2,COM
扫描速率
100帧/秒(游戏专用版甚至可达200fps) 50帧/秒 100帧/秒 50帧/秒
受干扰情况
无静电干扰,漂移现象
受温度、湿度、手指湿润程度等有漂移现象
长时间工作,容易漂移,需要经常校正
室外阳光 >=30度角,无干扰
寿命
整机连续寿命:50000小时 x200。在节能模式下,还可以提高10倍工作寿命。触摸次数:没有机械结构,等同电容屏2亿次
没有机械结构,单点触摸2亿次
最大触摸次数为500万次 最大触摸次数为6000万次
物体形状识别
支持 不支持 不支持 不支持
触摸方式
手指,笔 手指 手指,笔 手指,笔
通常适用液晶尺寸
19 -100寸
< 9.8寸
<19寸
19-100寸

来源:

http://www.timelink.cn/plus/list.php?tid=1

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FreeBSD 9.0-RELEASE Announcement

生产适用版更新为 v9.0; 旧式生产适用版当前为v8.2.

The FreeBSD Release Engineering Team is pleased to announce the availability of FreeBSD 9.0-RELEASE. This is the first release from the stable/9 branch, which improves on stable/8 and adds many new features. Some of the highlights:

A new installer, bsdinstall(8) has been added and is the installer used by the ISO images provided as part of this release

The Fast Filesystem now supports softupdates journaling

ZFS updated to version 28

Updated ATA/SATA drivers support AHCI, moved into updated CAM framework

Highly Available Storage (HAST) framework

Kernel support for Capsicum Capability Mode, an experimental set of features for sandboxing support

User-level DTrace

The TCP/IP stack now supports pluggable congestion control framework and five congestion control algorithm implementations available

NFS subsystem updated, new implementation supports NFSv4 in addition to NFSv3 and NFSv2

High Performance SSH (HPN-SSH)

Flattened device tree (FDT), simplifying FreeBSD configuration for embedded platforms

The powerpc architecture now supports Sony Playstation 3

The LLVM compiler infrastructure and clang have been imported

Gnome version 2.32.1, KDE version 4.7.3

For a complete list of new features and known problems, please see the online release notes and errata list available at:

http://www.FreeBSD.org/releases/9.0R/relnotes.html

http://www.FreeBSD.org/releases/9.0R/errata.html

For more information about FreeBSD release engineering activities please see:

http://www.FreeBSD.org/releng/

Dedication

The FreeBSD Project dedicates the FreeBSD 9.0-RELEASE to the memory of Dennis M. Ritchie, one of the founding fathers of the UNIX[tm] operating system. It is on the foundation laid by the work of visionaries like Dennis that software like the FreeBSD operating system came to be. The fact that his work of so many years ago continues to influence new design decisions to this very day speaks for the brilliant engineer that he was.

May he rest in peace.

Availability

FreeBSD 9.0-RELEASE is now available for the amd64, i386, ia64, powerpc, powerpc64, and sparc64 architectures.

FreeBSD 9.0 can be installed from bootable ISO images or over the network. Some architectures also support installing from a USB memory stick. The required files can be downloaded via FTP or BitTorrent as described in the sections below. While some of the smaller FTP mirrors may not carry all architectures, they will all generally contain the more common ones such as amd64 and i386.

NOTE: A problem was discovered with the DVD images for amd64 and i386 architectures shortly after they were loaded on the FTP distribution server. Those images have since been replaced and we have allowed enough time that the newer images should have distributed to all the FTP servers that carry the release. If you downloaded the amd64 or i386 DVD images prior to this announcement it would be a good idea to verify the checksums of the image you downloaded with the checksums provided as part of this Release Announcement. The only thing wrong with the images that were replaced is that sysinstall(8) can not be used to install the pre-built packages on the DVD. Other than that there is nothing different on the updated images. The bad DVD images were never available on BitTorrent.

MD5 and SHA256 hashes for the release ISO images are included at the bottom of this message.

The purpose of the images provided as part of the release are as follows:

dvd1
This contains everything necessary to install the base FreeBSD operating system, a collection of pre-built packages aimed at getting a graphical workstation up and running. It also supports booting into a “livefs” based rescue mode. This should be all you need if you can burn and use DVD-sized media.

disc1
This contains the base FreeBSD operating system. It also supports booting into a “livefs” based rescue mode. There are no pre-built packages.

bootonly
This supports booting a machine using the CDROM drive but does not contain the support for installing FreeBSD from the CD itself. You would need to perform a network based install (e.g. from an FTP server) after booting from the CD.

memstick
This can be written to an USB memory stick (flash drive) and used to do an install on machines capable of booting off USB drives. It also supports booting into a “livefs” based rescue mode. There are no pre-built packages.

As one example of how to use the memstick image, assuming the USB drive appears as /dev/da0 on your machine something like this should work:

# dd if=FreeBSD-9.0-RELEASE-amd64-memstick.img of=/dev/da0 bs=10240 conv=sync
Be careful to make sure you get the target (of=) correct.

FreeBSD 9.0-RELEASE can also be purchased on CD-ROM or DVD from several vendors. One of the vendors that will be offering FreeBSD 9.0-based products is:

FreeBSD Mall, Inc. http://www.freebsdmall.com/

BitTorrent

9.0-RELEASE ISOs are available via BitTorrent. A collection of torrent files to download the images is available at:

http://torrents.FreeBSD.org:8080/

FTP

At the time of this announcement the following FTP sites have FreeBSD 9.0-RELEASE available.

ftp://ftp.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/9.0/
ftp://ftp5.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/9.0/
ftp://ftp7.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/9.0/
ftp://ftp8.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/9.0/
ftp://ftp.au.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/9.0/
ftp://ftp.cn.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/9.0/
ftp://ftp.cz.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/9.0/
ftp://ftp.dk.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/9.0/
ftp://ftp.fr.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/9.0/
ftp://ftp.jp.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/9.0/
ftp://ftp.ru.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/9.0/
ftp://ftp.tw.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/9.0/
ftp://ftp.uk.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/9.0/
ftp://ftp2.us.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/9.0/
ftp://ftp10.us.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/9.0/
ftp://ftp.za.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/9.0/
However before trying these sites please check your regional mirror(s) first by going to:

ftp://ftp..FreeBSD.org/pub/FreeBSD

Any additional mirror sites will be labeled ftp2, ftp3 and so on.

More information about FreeBSD mirror sites can be found at:

http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/mirrors-ftp.html

For instructions on installing FreeBSD or updating an existing machine to 9.0-RELEASE please see:

http://www.FreeBSD.org/releases/9.0R/installation.html

Support

The FreeBSD Security Team currently plans to support FreeBSD 9.0 until January 31st, 2013. For more information on the Security Team and their support of the various FreeBSD branches see:

http://www.FreeBSD.org/security/

Other Projects Based on FreeBSD

There are many “third party” Projects based on FreeBSD. The Projects range from re-packaging FreeBSD into a more “novice friendly” distribution to making FreeBSD available on Amazon’s EC2 infrastructure. For more information about these Third Party Projects see:

http://wiki.freebsd.org/3rdPartyProjects

Acknowledgments

Many companies donated equipment, network access, or man-hours to support the release engineering activities for FreeBSD 9.0 including The FreeBSD Foundation, Yahoo!, NetApp, Internet Systems Consortium, Sentex Communications, New York Internet, Juniper Networks, and iXsystems.

The release engineering team for 9.0-RELEASE includes:

Ken Smith Release Engineering, amd64, i386, sparc64 Release Building, Mirror Site Coordination
Robert Watson Release Engineering, Security
Konstantin Belousov Release Engineering
Marc Fonvieille Release Engineering, Documentation
Josh Paetzel Release Engineering
Hiroki Sato
Release Engineering, Documentation
Bjoern Zeeb Release Engineering
Marcel Moolenaar ia64, powerpc Release Building
Nathan Whitehorn powerpc64 Release Building
Joe Marcus Clarke Package Building
Erwin Lansing Package Building
Mark Linimon Package Building
Pav Lucistnik Package Building
Ion-Mihai Tetcu Package Building
Martin Wilke Package Building, Ports Security
Colin Percival Security Officer
Trademark

FreeBSD is a registered trademark of The FreeBSD Foundation.

ISO Image Checksums

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http://www.freebsd.org/releases/9.0R/announce.html