Thursday, March 27, 2014
歡迎三星王副總加入SuperC-Touch團隊
與三星王副總認識快兩年了，他豐富的經驗與處世的沉穩，廣闊的人脈都是我輩望塵莫及的，感謝他於三星副總退休後，能接受我的邀請，加入SuperC-Touch的團隊，承接責任重大的副董職務，有王副董的加入，大幅提高了SuperC-Touch的國際視野與能見度，對SuperC-Touch而言真是如虎添翼，未來一番全新的局面是值得期待的。
Tuesday, February 4, 2014
2014年台灣觸控專利排名
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Wednesday, January 1, 2014
迎接2014年的開始，SuperC-Touch 新計畫正式展開
2014年 SuperC-Touch 新計畫
帶著2013年滿滿的收穫，正式跨入2014年，感謝業界的朋友不遺餘力的支持，讓SuperC-Touch可以日益茁壯，漸進地在觸控產業擁有一席之地，發明的新觸控技術 "微擾共振" 也漸獲大家肯定，在去年的期間送出的專利，獲證了30件，其中80%的專利與in cell相關，也相對地增加了SuperC-Touch在內嵌式觸控的影響力，預計2014年在觸控專利部分應可再取得40~50件的專利獲證，去年底更接受深圳全國觸控大展的邀請，發表專題演說並許多與會貴賓一起主持高峰論壇。
檢討SuperC-Touch的優勢與弱點，在加上與許多的業界朋友討論後，SuperC-Touch未來的走向也將趨於明朗，關鍵在於如何互助與合作而已，把 SuperC-Touch 的優勢拿來補足業界朋友的不足，增加其競爭優勢，SuperC-Touch 將扮演一塊拼圖的腳色，協助大家成功立業。
其實SuperC-Touch目前的優勢在於新的觸控偵測技術 與 先進內嵌式觸控螢幕的專利佈局，這兩項優勢正好是目前業界所最欠缺的，也是影響觸控產業革命的關鍵因素，任何觸控IC設計公司於取得SuperC-Touch的 "微擾共振" 的技術移轉後，相信在一年內就可以開發出量產的觸控IC，可輕易地跨入OGS，Metal mesh，奈米銀，On cell與In cell的領域，取得市場的領先地位，任何 LCD面板廠商都可以取得SuperC-Touch的先進內嵌式觸控螢幕的專利授權，大幅降低內嵌式觸控面板的生產難度與成本，獲取更高的利潤空間來增加獲利，所以技術移轉與專利授權將是SuperC-Touch的營運模式，SuperC-Touch不再進行量產觸控IC的計畫，轉換為協助業界好朋友來量產觸控IC，SuperC-Touch將把重心放在技術研發與專利申請兩項目標上，來提供業界朋友更好更佳的產品解決方案與專利保護。
Tuesday, October 15, 2013
Metal mesh touch and Advance in cell touch technology
Metal mesh
touch and Advance in cell touch technology
Study of the issues of metal mesh touch
•
Because metal mesh is opaque, so to achieve 95%~99%
transmittance means to pick off 95%~99% sense area. When touch sensor area
remaining 1-5%, the amount of the touch sensing signal that touch circuit
received will also be reduced by 20 to 100 times, in this condition is there
any touch IC can support this metal mesh touch panel.
•
For avoiding the human eyes to see, the width of a
metal line must be less than 5 microns, Existing touch panel plant’s
lithography equipment is impossible to implement, we must use the LCD panel
plant’s high level photolithography equipment to do the job, if you replace the
photolithography process by the printing method to print less than 5 micron
metal wire, even the most sophisticated letterpress printing techniques, yield
issues remain difficult to overcome. The cost of stencil will be high,
durability of stencil, stencil cleaning cost; all will significantly affect the
cost of the metal mesh touch panel.
•
Using roll-to-roll production equipment in high
speed and high tension conditions, how to keep the wire less than 5 micron
continue line without broken, also a challenge for the equipment manufacturers.
•
In addition to the characteristics of the metal
opacity but also high reflectivity, it is necessary to add opaque material or
anti-reflective material to solve reflection problem, and therefore to impact on
the manufacturing process, increasing the difficulty and cost of production.
•
Using silver, aluminum or copper as a metal mesh
material, must face with oxidation problem, how to add surface treatment
material to prevent oxidation, also increases the difficulty and cost of the
production process.
•
When we successfully overcome the above problems
later, could we remain convinced that the metal mesh has a cost advantage?
Metal mesh touch technology's success key point
is the touch IC
Currently the hottest topic in the touch industry
"metal mesh touch"; new technologies and new materials to replace ITO
materials in order to reduce the cost of touch panel is gaining momentum, and many
friends of the industry have also focused on this. Metal mesh is opaque
material, but has to use at a transparent purposes, this is bound to the
balance between product optical consideration and user acceptance issues. Transmittance,
reflectance, interference caused by the phenomenon of Newton's rings are in a
test of user acceptance. The higher quality requirement needs to use the finer
metal wire, the finer metal wire the smaller sensor area and much more
difficult to produce also increase the production costs, the tiny sensor area
will challenge the detecting ability of the touch controller IC. So that the
existing touch IC industry cannot cross this technical threshold and therefore
metal mesh touch technology's success key point is the touch IC, but not
production technology of the panel firms.
Metal mesh sensor should
not use mutual capacitance technology
•
First, driving electrodes Tx and
the receiving electrode Rx overlap area is a non-effective region, therein the
electric flux lines can take the shortest distance route, so when the finger
touches the region cannot affect changes in the electric flux lines and no
mutual capacitance change induced. Second, the smaller overlapping area the
smaller mutual capacitance, the closer the two layers the larger the mutual
capacitance; these two parameters can be adjusted to get the desired mutual
capacitance value.
The size of the
mutual capacitance is inversely proportional to the value of its capacitive
impedance, of the impedance of the mutual capacitance becomes larger, then the
touch sensing current will become smaller, thus, the design trick is to pick
the best measureable induced current as a necessary condition, and to make
overlapping area the smaller the better.
To achieve greater
finger touching capacitance change, the adjacent but non-overlapping regions
between Tx electrode and Rx electrode are the larger the better, thus there are
more electric flux lines overflow through the substrate to react with the finger.
When a finger approximates or touches, it can block and absorb those overflowed
electric flux lines, so the blocked electric flux lines cannot reach Rx
electrode caused the mutual capacitance reduction. That’s why Apple applies
larger Tx electrode and smaller Rx electrode to her mutual capacitance
double-layer structure.
•
How reasonable arrange both the size of non-touch
mutual capacitance and touch mutual capacitance change, which challenge to the
skill of design of touch panel plant. Since mutual capacitance is reduced when
touch occurs , the lowest limit is that the mutual capacitance change to 0, so
the key point is that, where a fundamental value from which began to change,
this is the non-touching mutual capacitance values we want. Someone would say the
bigger the better, so have enough space to change, it is not true, we have to
take the sensing circuit and amplification method into account, the larger
reserved space in the front the more unfavorable for sensing signal
amplification, the quality of signal amplification directly impact on the touch
sensitivity, so different touch circuit is suitable to different touch panel
specifications. If you choose the correct touch IC, the touch panel design will
be very simple and flexible, contrary to disastrous consequences.
•
When we use metal mesh replace ITO sensing
electrode, what places changes along with? First, because the area of Tx and Rx
becomes smaller, so the overlapping area becomes very small and the capacitive
impedance increases dramatically, thus sensing current becomes very tiny, but
the background noise still remains the same condition, and therefore SNR
deteriorates seriously. Second, because the non-overlapping region becomes
smaller, so only very few electrical flux lines overflow to outside to react
with touch finger, thus touching mutual capacitance change becomes very small,
causes SNR deterioration more serious. Although the metal mesh could reduce the
sensor resistance to benefit sensing sensitivity, but the very limited scope
for improvement is not sufficient to remedy the deterioration of SNR, so the
use of mutual capacitance technology for metal mesh, whether to do it at the
LCD internal or external, the chances of success are not much, only the
self-capacitance technology is feasible.
Metal mesh in
cell touch
Metal mesh concept may
seem simple, but difficult to do well. However there is always an opportunity, open your mind to change the
ideas may make a big difference. Putting the metal mesh in invisible positions of the LCD inside, all optical problems can be solved at once; we call this method "Metal mesh in-cell touch". The
first to propose this view is not the author, but veteran Apple in 2007
proposed an advanced embedded touch patent Apple's US Patent No. 8,243,027; In this patent,
Apple suggested two revolutionary concepts;
First, The common electrode (Vcom) inside the LCD
is patterned as touch sensing electrodes, so you can solve the great
self-capacitance due to the sensing electrodes inside the LCD thus too close to
common electrode. Both Sony's Pixel eyes technology and Synaptics’s TDDI
technology are derived therefrom, but since Apple's US8, 451,244 B2
"Segmented Vcom" Patent certified, panels with Pixel eyes or TDDI's in cell panel structure
would infringement concerns.
Second, take advantage of the internal LCD unseen
locations to build a metal mesh touch sensor, neither observable issues nor
metal wire reflection and glare problems, one solution to solve all optical
problems. Samsung TW 201217863 patent application is to follow this idea. Of
course, LGD, AUO, Innolux, Hannstar, CPT, Wintek, Sharp, JDC, also has similar
patent applications.
A battle of whether to make the metal mesh inside
or outside the LCD, that is pulling touch panel and LCD panel plants plate movements,
it is interesting that the key factor of victory or defeat is not the two major
forces in this war but touch IC technology and touch panel patent portfolio.
Touch measurement
techniques don't measure capacitance, "perturbation resonance" on stage
Currently the touch industry measure capacitance
touch the way, nothing more than to input represents the charges voltage or
current, then accumulate it as a reading value, and use a software algorithms
to process many recorded readings, as a basis to judge the touch signal amount.
These cumulative actions must to measure the approximate steady-state charge
movements, and the results will be accurate, I would classify it the
"steady-state measurements method" or "Static Measurement Method".
In
addition to measuring the charge accumulated, there are also other changes can
be measured, for example, analyzing the voltage or current state of change with
time, behind the nature of the changes, whether there exist a particular
Pattern, I call it "Transient Measurement Method" or "Dynamic
Measurement Method".
When many of the components interact with each
other and produce feedback reaction, it already has the basic elements of
complexity theory, complex state has no periodicity, no regularity,
unpredictable and other features, it is difficult to use analysis and inductive
method to deal with. But when the various environmental factors under certain
conditions then the complex will enter a "chaos" state, at this
moment, it will present a great order of something, similar to the "Things
always reverse themselves after reaching an extreme", and
"perturbation resonance" the touch of new technologies, is the use of
this principle.
Perturbation resonance touch technology doesn’t
measure capacitance, it predominates the environmental conditions to induce
"chaotic state" occurrence, in other words, these chaotic touch
signals (including noise), make it into a real "chaotic state", once
into the chaotic state, the touch signal and noise will blend together to
become the new touch signals which is sufficient for touch judgment, therein
this new touch signal will be endless, endless, and disturbing noise has also
become an important element of the touch signals, like we often hear of the
"butterfly effect" is the same reason. This new touch change signal
in comparison with the prior art measuring the accumulated change of charge,
even hundreds of times to thousands of times bigger, it can be regarded as the
revolutionary new touch technology.
Super C-Touch is
a touch industry pioneer, the world's first applied "chaos theory" in
measuring changes of touch, probably is the world's first successfully achieved
practical application by a chaotic state, so whether in physics or touch the
field of history have left footprints.
For touch design and production, no longer need to measuring
capacitance is really a godsend.
•
No longer worry about optical adhesive to induce
uneven thickness or thickness error problem in lamination process. Slight
difference in thickness is sufficient to cause the capacitance value difference
which is larger than capacitance difference caused by finger touch, so
thickness problem is the number one enemy of lamination process.
•
Never worry about different material of
substrate.
•
Never worry about the touch pattern on the bit
offset issue in alignment process.
•
Never worry about ITO resistance and capacitance
values too large problem.
•
Never worry about touch Sensor area is too small
to induce insensitivity issue.
Basically as long as there is no open or short
problem and no visual defect, then the touch panel is qualify to sell, thus
substantially increase the lamination yield and touch Sensor production yield,
more importantly, remove the obstacles to enter in-cell touch domain, touch
industry becomes very simple since there is no barrier to entry, then touch the
industry will enter a mature stage, since the touch industry enter its final
stage, so most of existing firms will gradually be forced to exit the stage,
and only remains a few firms to dominate the industry.
Slip through
the net: Touch in-cell metal mesh structure of AMOLED
Spent a
lot of time searching for information about the in cell AMOLED touch patent and
only very few can be found. Even Samsung have not patent applied, only found several
patent proposal related in-cell touch are also the same with earlier, using the
substrate deformation caused by a short circuit or change in capacitance caused
by proximity to detect touch. Or else that apply generally embedded LCD touch
when the way to expand the scope of claim to the OLED field, basically all are
not invented for AMOLED.
Inferences
about the following three reasons, (1) most people do not understand the
principle structure of the AMOLED, so could not do. (2) Experts familiar with the
AMOLED found it impossible to cross a major obstacle, so they cannot design a
feasible in-cell touch structure of AMOLED. (3) Just using the touch sensing
glass as a cover glass of AMOLED could achieve on-cell touch, while the
existing Sensor glass is very cheap, if done in cell touch to cause any yield
losses on its costs are higher than the cost of the touch sensor glass, so the
development of in-cell AMOLED touch is pointless.
After
discussing with the friends of Samsung, reached a consensus that the main
reason is the aforementioned third point, when there is not enough attractive
interests, whoever waste of time to do this research and development. But one
incident made me change my opinion, to accept a unit's invitation to
participate in a seminar on mobile devices thinner forum. We discuss what is
the thinnest combination of touch structure with display panel, very naturally
mentioned to in cell, on cell and OGS, etc., their structure is actually little
different. Among these was an ITRI analysts mentioned a quite creative
argument, he said that no matter in cell, on cell and OGS have three glass to
form, two to the LCD with the outside plus a protective glass, but if you are
using a AMOLED when there may range from three glass becomes two glass. Simply
replace on-cell's touch sensor by OGS to achieve it, very reasonable, I pushed
it a step further, if a flexible AMOLED (foldable AMOLED) attached to the OGS
and it is turned into only one glass on completion.
Whether
two or one glass structural needs OGS touch to match, while the cost of OGS is
much higher than touch sensor only, and therefore the in-cell touch can reduce
many of the costs. Also you can make flexible AMOLED touch the best way is
in-cell metal mesh structure of the touch, because the ITO material is brittle
and considerably difficult to be folded, however the metal materials do not
have this problem is folding the best option.
Conclusion
To produce an
In-cell touch screen is very simple, just use the touch sensor glass to make
the LCD color filter glass, then adhere it to an Array glass, pouring the
liquid crystal in and finish. There are over one hundred patents that use of
this concept all over the world, but the drawback is no cost savings and a
large capacitance is formed between the touch sensor and the Vcom, thus all
touch control ICs cannot work normally.
The second method is to pattern the Vcom as
sensors, therefore
to solve the above-mentioned deficiencies, no more difficulties for touch
control IC, and this is the method used in iPhone 5, but Apple’s patent is an
exclusive monopoly, to be heading in this direction will be infringement
concerns.
The last way is to make the metal mesh as sensors
inside the LCD panel,
currently the world about the amount of related patent applications is
still limited, it is more possible development areas; In addition, in AMOLED in-cell
touch territory, in fact, there is still quite a large part of the development
space, Since
in addition to Samsung's AMOLED with the separated RGB, there are LGD as the representative
of the white light AMOLED.
It is the same as LCD panel that the white light AMOLED needs to use
the color filter glass, thus, it cannot use the sensor glass as on-cell touch
and its touch cost is higher, and therefore, there is a greater incentive to
introduce the in-cell touch technology.
Tuesday, September 3, 2013
觸控專利申請統計表
查詢台灣專利申請日期於 2010/1/1 到 2013/8/19 之間的觸控專利，排名依總獲證數量排列
| 排名 | 廠商 | 發明數量 | 發明獲證 | 新型獲證 | 總獲證 |
| 1 | 宸鴻 | 103 | 0 | 129 | 129 |
| 2 | 工研院 | 136 | 42 | 1 | 43 |
| 3 | 華映 | 46 | 0 | 23 | 23 |
| 4 | 洋華 | 2 | 0 | 15 | 15 |
| 5 | 友達 | 179 | 13 | 1 | 14 |
| 6 | 鴻海精密 | 213 | 5 | 8 | 13 |
| 6 | SuperC-Touch | 13 | 2 | 11 | 13 |
| 8 | 勝華 | 113 | 2 | 6 | 8 |
| 9 | Apple | 269 | 0 | 7 | 7 |
| 10 | 介面 | 7 | 0 | 6 | 6 |
| 11 | 彩晶 | 46 | 1 | 4 | 5 |
| 12 | 禾瑞亞 | 17 | 0 | 3 | 3 |
| 13 | 奇美 | 121 | 0 | 2 | 2 |
| 13 | 義隆 | 51 | 2 | 0 | 2 |
| 15 | 敦泰 | 4 | 0 | 1 | 1 |
| 15 | 晨星 | 29 | 1 | 0 | 1 |
| 瑞鼎 | 40 | 0 | 0 | 0 | |
| 三星 | 122 | 0 | 0 | 0 | |
| LGD | 146 | 0 | 0 | 0 | |
| Atmel | 36 | 0 | 0 | 0 | |
| Cypress | 0 | 0 | 0 | 0 | |
| Synaptics | 0 | 0 | 0 | 0 | |
| 1693 | 68 | 217 | 285 |
Sunday, August 25, 2013
混合內嵌式觸控 Apple 補強專利已於今年獲證
混合內嵌式觸控 Apple 補強專利已於今年獲證
由Sony最先生產的混合內嵌式觸控，運用LCD內部的Vcom分條後作為觸控的驅動訊號Tx，然後在LCD的玻璃外再用ITO做成觸控用的接收電極Rx，新思(Synaptics)的TDDI技術用的觸控結構也是如此，當初Apple在2007年提出的專利雖然有提到這個觀念，可是權利項中並沒有關於這種觸控結構的描述，所以筆者在這兩年來的多次演講中，都提到這個技術可能會成為公版，因為缺乏專利的保護，雖然Sony有提出相關的專利申請，可是有Apple作為前案，通過的機會不高，現在Apple已於今年5月取得這方面的專利，讓整個產業的局勢產生變化，據筆者所知已經有許多面板業者投入開發相關的研發與生產，甚至已有產品出貨，現在需要好好考慮專利的因素，會不會造成重大損失。
Segmented Vcom
US 8451244 B2
Date of Patent: *May 28, 2013
FILed ' Apr‘ 11’ 2011
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a
divisional of U.S. patent application Ser. No. 11/760,036, filed Jun. 8, 2007,
which claims priority to Provisional U.S. Patent Application Ser. No.
60/804,361, filed Jun. 9, 2006, Provisional U.S. Patent Application Ser. No.
60/883,979, filed Jan. 8, 2007, which are hereby incorporated by reference in
their entirety.
Abstract
Disclosed
herein are liquid-crystal display (LCD) touch screens that integrate the touch
sensing elements with the display circuitry. The integration may take a variety
of forms. Touch sensing elements can be completely implemented within the LCD
stackup but outside the not between the color filter plate and the array plate.
Alternatively, some touch sensing elements can be between the color filter and
array plates with other touch sensing elements not between the plates. In
another alternative, all touch sensing elements can be between the color filter
and array plates. The latter alternative can include both conventional and
in-plane-switching (IPS) LCDs. In some forms, one or more display structures
can also have a touch sensing function. Techniques for manufacturing and
operating such displays, as well as various devices embodying such displays are
also disclosed.
What is claimed is:
1. A touch screen comprising:
a liquid crystal display having a plurality of pixel electrodes and a
counter electrode;
the counter electrode segmented into a plurality of touch drive electrodes,
the counter electrode operating as a common voltage electrode by providing a
common voltage during a display function and operating as the plurality of
touch drive electrodes during a touch function;
a plurality of touch sense electrodes spaced apart from the plurality of
touch drive electrodes to form capacitive coupling nodes therebetween; and
at least one capacitance touch sensing circuit operatively coupled to the
plurality of touch sense electrodes during the touch function for measuring a
change in capacitance at the capacitive coupling nodes;
wherein during the touch function, the plurality of touch drive electrodes
are operative to transmit at least one stimulation voltage along one or
multiple ones of the plurality of touch drive electrodes to the capacitive
coupling nodes.
2. The touch screen of claim 1, wherein the liquid crystal display has a
color filter plate and wherein the plurality of touch sense electrodes are
disposed on the color filter plate.
3. The touch screen of claim 2, wherein the liquid crystal display
comprises a plurality of rows of display pixels and wherein each of the
plurality of touch drive electrodes overlaps plural rows of display pixels.
4. The touch screen of claim 2, wherein the plurality of touch drive
electrodes are disposed on the color filter plate.
5. The touch screen of claim 2, wherein the plurality of touch drive
electrodes are disposed on the color filter plate on a side opposite the
plurality of touch sense electrodes.
6. The touch screen of claim 2, wherein the liquid crystal display further
comprising:
a first polarizer;
a second polarizer;
an active matrix layer disposed on a first substrate, the first substrate
disposed between the first and second polarizers;
the color filter plate disposed between the first and second polarizers and
spaced apart from the active matrix layer; and
a liquid crystal layer disposed between the first substrate and the color
filter plate.
7. The touch screen of claim 6 wherein the liquid crystal display comprises
a plurality of rows of display pixels and wherein each of the plurality of
touch drive electrodes overlaps plural rows of display pixels.
8. The touch screen of claim 1, wherein the plurality of touch drive
electrodes comprise patterned ITO and the plurality of touch sense electrodes
comprise patterned ITO.
9. The touch screen of claim 1, wherein the liquid crystal display
comprises a plurality of rows of display pixels and wherein each of the
plurality of touch drive electrodes overlaps plural rows of display pixels.
10. The touch screen of claim 9, wherein a touch scanning rate is twice a
display refresh rate.
11. The touch screen of claim 1, wherein a touch scanning rate is twice a
display refresh rate.
12. The touch screen of claim 1, wherein a touch scanning rate is equal to
a display refresh rate.
13. The touch screen of claim 1, wherein:
the liquid crystal display comprises a plurality of rows of display pixels
and wherein each of the plurality of touch drive electrodes overlaps plural
rows of display pixels and
each display pixel includes a storage capacitor and in the display function
the common voltage is applied to each storage capacitor of the plural rows of
display pixels overlapped by each of the touch drive electrodes.
14. The touch screen of claim 13, wherein in the display function, the
common voltage is also applied to the touch drive electrodes.
15. The touch screen of claim 13, wherein in the touch function, the
stimulation voltage is also applied to each storage capacitor of the plural
rows of display pixels overlapped by a given touch drive electrode which
receives the stimulation voltage.
16. The touch screen of claim 13, wherein in the touch function, each
storage capacitor of the plural rows of display pixels overlapped by a given
touch drive segment which receives the stimulation voltage is placed in an open
state.
17. The touch screen of claim 1, wherein the liquid crystal display further
comprises:
a first polarizer;
a second polarizer;
an active matrix layer disposed on a first substrate, the first substrate
disposed between the first and second polarizers;
a color filter plate disposed between the first and second polarizers and
spaced apart from the active matrix layer; and
a liquid crystal layer disposed between the first substrate and the color
filter plate; and
wherein the plurality of touch drive electrodes and the plurality of touch
sense electrodes are disposed on the color filter plate.
18. The touch screen of claim 17, wherein the plurality of touch drive
electrodes and the plurality of touch sense electrodes are disposed on opposite
sides of the color filter plate.
19. The touch screen of claim 18, wherein the plurality of touch drive
electrodes are disposed on a side of the color filter plate facing the liquid
crystal layer, and the plurality of touch sense electrodes are disposed on a
side of the color filter plate facing the second polarizer.
20. The touch screen of claim any of claim 1, wherein the display and touch
functions are performed simultaneously, and an area of the display being
updated in the display function does not overlap an area of the display being
scanned in the touch function.
21. The touch screen of claim 20, wherein the at least one capacitance
touch sensing circuit includes a charge amplifier having an inverting input
coupled to receive an output from the plurality of touch sense electrodes, a
non-inverting input coupled to a reference potential and an output coupled to
the inverting input.
22. The touch screen of any of claim 1, wherein the capacitance touch
sensing circuit includes a charge amplifier having an inverting input coupled
to receive on output from the plurality of touch sense electrodes, a
non-inverting input coupled to a reference potential and an output coupled to
the inverting input.
23. An electronic device incorporating the touch screen as recited in claim
1.
24. A method of integrating the functions of a liquid crystal display and a
touch screen comprising:
providing a counter electrode segmented into a plurality of touch drive
electrodes for operating as a common voltage electrode by providing a common
voltage during a display function and operating as the plurality of touch drive
electrodes during a touch function; and
providing a plurality of touch sense electrodes spaced apart from the
plurality of touch drive electrodes to form capacitive coupling nodes
therebetween, the plurality of touch sense electrodes adapted for coupling to
capacitance touch sensing circuitry;
wherein during the touch function, the plurality of touch drive electrodes
are operative to transmit at least one stimulation voltage along one or
multiple ones of the plurality of touch drive electrodes to the capacitive
coupling nodes.
25. The method of claim 24, further comprising: providing the plurality of
touch sense electrodes on a color filter plate.
26. The method of claim 25, further comprising: providing a plurality of
rows of display pixels; disposing each of the plurality of touch drive
electrodes in overlapping relationship with a contiguous group of the plurality
of rows of the display pixels.
Monday, August 12, 2013
內嵌式金屬網格觸控結構 Metal mesh in cell touch LCD
內嵌式金屬網格觸控結構
metal mesh in cell touch LCD
敦泰科技最近與大陸手機廠合作推出了使用新一代內嵌式觸控結構的手機VSUM i1 精英版，據傳聞使用了兩層的金屬網格在LCD彩色濾光玻璃的BM下層位置，而敦泰發表的說法則是說，將Apple iPhone 5原本做在LCD array玻璃上的觸控Sensor移到彩色濾光片玻璃的BM下層，另外也有一說是使用類似Sony 的mix on cell/in
cell結構(同於新思 的 TDDI技術)，SuperC-Touch 很好奇地去查詢了敦泰科技有關內嵌式觸控的專利申請，找到有三篇關於內嵌式觸控結構的專利，日期分別在2012年的9月，2013年的 1月，2013年的2月，剛申請不久與現在距離蠻近的，仔細看過內容後發現與 SuperC-Touch 獲證的內嵌式觸控結構專利類似，都是主張用Metal mesh當觸控Sensor 並且將其做在LCD內部看不到的區域，如此就可以解決Metal mesh 觸控技術所面臨的最大困擾 “反光” 與 “穿透率不好” 的問題，SuperC-Touch推廣這個技術已超過了一年的時間，很可惜並沒有獲得太多的認同，現在有敦泰科技一起發聲，至少不會孤獨。
Metal
mesh in cell touch 將會徹底改變觸控的產業生態，將板塊由觸控面板廠或模組廠轉移到LCD的面板廠，其最大的好處是生產容易，良率高，成本低，產量大，光學特性最好，最輕最薄，所有的優點都具足了，為什麼沒有LCD面板廠願意投入這個技術來開發產品，關鍵就在於找不到可以使用的觸控IC技術可以支援這個觸控結構，因為觸控IC必須要解決很大的自電容問題(高達幾百pF，比on cell 高出100倍)，LCD 內部雜訊干擾問題(比on cell嚴重100倍)，這兩個問題讓大家難以相信其可行性而裹足不前，SuperC-Touch雖然做了許多實驗來證明其可行性，但是缺乏資金難以完成樣品讓大家信服，讓內嵌式金屬觸控技術原地踏步了一年，現在敦泰科技將此技術用在手機並且量產，開啟了Metal mesh in cell touch 的新紀元，不論其好壞都可證明此技術的可行性，未來的三年的發展將是觸控產業的關鍵，谁是新的觸控產業領導者，就決勝在跟的腳步快慢與專利佈局上的深淺廣度。
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