Embedded touch panel with efficiency / cost advantages
Author:Speechless Time:2021-06-09 08:04 Browse(438)
K4415
The embedded touch panel will be popular.
compared with the external film touch panel.

Embedded touch panel with efficiency / cost advantages

the embedded touch panel such as in cell and on cell not only has better performance, but also can meet the design requirements of lightweight and low-cost products. It has been rapidly adopted by the manufacturers of smart phones, tablets and laptops. When the supply volume increases and the price drops, the penetration rate will be even larger.
the embedded touch panel will be widely used by the manufacturers of smart phones, tablets and laptops; u- ^$ A7 ~/ b) e8 A) _ 9 U: h+ i) X3 AEmbedded touch panel has attracted much attention due to its advantages of light weight, good transparency and simplified supply chain.
the development of embedded touch panel has been followed by Apple iPhone's in cell touch panel and Samsung Galaxy's In recent years, Taiwan's panel manufacturers have made significant progress in LCD on cell touch panel, and their products have been introduced into smart phone applications and mass production in succession.
in recent years, Taiwan's panel manufacturers have also made significant progress in LCD on cell touch panel8 S) ~% Y. \.
S1 ]' S: B "j + K + L * s - {. '" process integration is difficult, panel yield needs to be broken through. U. i9 B- m0 a8 Y8 j  T! D4 R7 P1 f # n - F4 F%]. V, P3 h) ~ embedded touch screen is made by making touch sensor inside the panel,The embedded touch panel has three advantages: firstly, the thickness of the embedded touch panel can be reduced because there is no need to configure glass or film substrate outside the panel; secondly, the ambient light reflection can be reduced because there is no glass or film substrate outside the panel, and if the existing indium tin oxide (ITO) layer inside the panel is used as the touch sensor, Third, if the system manufacturer adopts the embedded touch panel, there is no need to purchase additional touch sensors, which can simplify the procurement or supply chain management.
the system can improve the display performance: C5 ]6 {' Z$ ]9 h. J. W* ?2 M3 `2 }$ u8 @  VMoreover.
although it is quite difficult to integrate the touch sensor into the existing panel process, the yield of the embedded touch panel is low and the cost is high at the initial stage of development, but if we can break through the bottleneck of the process and effectively improve the yield, the embedded touch panel can save the materials of the external touch sensor, In this context,
panel manufacturers have invested in the development of embedded touch panel.
4 M0 ^ / Z + M '_ 1 f' ^: N1 G- `6 |# A! z' Y9 h+ v! T3 d+ q# o) \+ V( USeizing the high-level market, in cell supply stability becomes the key; q0 d( g! H8 n! f+V (Q9 G! K * e; O.
m $Q0 ` embedded touch panel can be divided into two types: in cell and on cell. In cell uses touch sensors as TFT array,On cell is a hybrid architecture that uses touch sensors on color filter glass (CF glass) and TFT array and CF glass respectively. In this paper, it is classified as in cell0 ]( u4 a* D- H- M6 h0 j6 l- ~) P5 F  e5 W4 L- KDue to the high difficulty of in cell touch technology,
there are challenges in production yield and touch IC design, so the imported brands and terminal models are still few, and only apple, Sony, HTC and Google adopt them.
specifically speaking,
at present, the mass production of in cell touch panel is mainly based on the technology developed by Apple or Sony, Apple's iPhone 5 was produced by LG, Japan display and sharp, while Sony's technology was produced by JDI after its panel division was merged with Toshiba and Hitachi's panel division into Japan display2 H2 ?7 b- n# P; M3 z* _ ' l+ v, d! h& V! [It is noteworthy that JDI announced in April 2014 that its In-Cell touch panel (HD resolution) has been included in the reference design of the mobile phone solutions of the MediaTek, showing its intention to import the product into Chinese mainland brand.
.For Chinese mainland brands that have already planned "ultra-thin fuselage" products, the.
In-Cell touch panel is quite attractive, but the price of the products and the availability of goods are stable, and the key points for subsequent observation are.
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\% I+ l) p* `) y: u" N4 T% U0 '([6 o # Y! T (y. J)] price competitive LCD on cell introduced into medium and low level mobile phone 6? 7 y $C / [V9 D & [8 T (o+|# R + s. d3o7 g3a5 t on cell touch technology is not only used in LCD panel, but also in AMOLED panel.
Samsung display uses the encapsulation glass of AMOLED panel.
the touch sensor (single-sided and double-layer) is made on its surface, Compared with LCD panel, it is easier to make on cell touch panel.
since 2012,
the AMOLED on cell touch panel has been imported into the Galaxy series of Samsung high-end smart phones for mass production, becoming the main shipping force of on cell touch panel at present.
'f + Q -} - \ \ x # G7_ / M5 b5 D5 A6 N( U9 h  `4 G+ l) v; S0 wIn the aspect of LCD on cell touch panel,
is a field that Taiwan panel manufacturers are actively developing.
for smart phone applications.
Taiwan panel manufacturers consider that the manufacturing process (bridge insulation) of "single-sided and double-layer" touch sensors is relatively complex,In order to seize the business opportunities, we cooperated with touch IC manufacturers to develop a low-level and medium-level solution that can support two to five finger multi-point touch with "single-sided single-layer" touch sensor and touch IC.
9 n "W) ~" I "T4 V /] # Z%X9 t '@! A * Z.
J. because the price of on cell touch panel solutions of Taiwan panel manufacturers is quite competitive with that of film touch panel, it is an incentive to purchase low and medium price smart phone products with high cost sensitivity of components, Since the fourth quarter of 2013,
the on cell touch panels of Taiwan panel manufacturers have been in mass production with their customers' products.
* G6 | "G6 a w x0 V6 y $Z * a $@. B! V0 @.
l7 ]9 h& O# v1 r6 CHowever, the number of on cell touch panel solution suppliers (including panel and touch IC) of Taiwan panel manufacturers is still small, and some products are only supplied by a single manufacturer. Considering the supply stability, system manufacturers are conservative about importing on cell touch panel into their products.
on the other hand.
thin film touch panel manufacturers stick to the market share, It also reduces the price to compete with the manufacturers of on cell touch panel, which makes the popularization of on cell touch solution still quite challenging in the short term.
% G: ^ 0 y; N3 V1 g. R+Y3 C3 V # Q # R * w # Y8 P is beyond the application of smart phones.
this paper introduces the application of Y3 C3 V # Q # R * w # Y8 P in smart phonesTaiwan panel manufacturers have also invested in the development of on cell touch panels for tablet and notebook applications.
in tablet applications.
panel sizes are 7 inches and 8 inches, and touch sensors with single-layer and double-layer structures are adopted by manufacturers. According to the current schedule, it is expected to be mass-produced with customers' products in 2014.
6_ 0 q4 i- {3 s2 Z6 z& X( D8 l# O* }1 n6 o/ D8 k9 |In the aspect of pen and TV.
due to the strict touch performance requirements of Microsoft specifications, the touch sensor must adopt a single-sided and double-layer architecture which is more difficult to make, and the panel size is expanded to 14 inches and 15.6 inches, which makes its production more challenging, and the actual development situation remains to be observed.
in this paper, the design of the touch sensor is introduced9 k- J' h4 Y& x.
w, n# I! Z" E# F' X1 ~7 {# h( x, WRio Tinto LCD on cell market IC / panel factory working together' r2 g  n6 Z+ {" A  V4 ~ * Z: U8 n / @ 3 l9k in the aspect of on cell touch (since AMOLED on cell is unique to Samsung, the following analysis takes LCD on cell as the category), it is obvious that the partners of touch IC manufacturers have changed from touch sensor manufacturers and touch module manufacturers to panel manufacturers.
7 H1 K -} 8 o'w% k3k2 {"O; W3 H + s: Q. f; G & R" touch IC manufacturers develop products according to the structure, pattern and other specifications of on cell touch sensorsAfter the IC is completed and matched with the on cell panel, the solution will be promoted to the system customers, including the on cell touch panel and the touch IC.
) @) l & Z # M & W #_   k. I4 R$ B.
[$ p" q  ~* tAlthough touch IC and driver IC manufacturers of on cell touch panel cooperate with panel manufacturers, the difference is that system manufacturers usually do not lead the purchasing decision of driver IC, but leave it to panel manufacturers; touch IC is a key component of human-computer interface related to user experience, In other words,
in the field of on cell touch, although touch IC manufacturers cooperate closely with panel manufacturers, their customers are still system manufacturers (just like plug-in touch), so it is very important to obtain the recognition of system manufacturers4 R2 M! n6 Z% s' F9 r5 L. ~' V+ G% X1 @9 pAs on cell touch products have not been put into the market for a long time.
system manufacturers have little application experience. If they want to import on cell touch panel, they should give priority to the touch IC recommended by panel manufacturers, which makes panel manufacturers have a certain influence on the sales of touch IC.
however.
as more panel manufacturers and touch IC manufacturers invest in on cell touch, they will increase the supply of related products, At the same time, system manufacturers continue to accumulate application experience, and it is expected that in the future, on cell touch will evolve into a situation where touch panels and touch ICs can be freely matched, just like plug-in touch.
9 N2 j4g% z3o6 ~8 U7 B' W0 B.
[+ J0 r in cell market touch / drive IC compete for 5 A / x $g - ^ + ':?7] * L4 G: I: \% w & L in terms of in cell (including in cell hybrid) touch, its supply chain relationship is significantly different from plug-in touch and on cell touch.
because in cell touch panel is to bring touch IC and drive IC into one system consideration.
each panel factory has its own design technology, so in cell touch panel can only be matched with specific touch IC, System manufacturers can not choose touch panel and touch IC individually, but can only consider and check the solutions proposed by suppliers as a whole.
this also makes in cell touch IC like drive IC.
panel manufacturers are not only partners of IC manufacturers, but also more direct customer relationships.
3 U1 B / p'q-y + O # [9 ` 0 | $u's% V0 e: t # L for IC manufacturers.
in the field of on cell touch, touch IC and drive IC are independent of each other, and the motivation to provide the above IC products at the same time is mainly to increase the revenue and bargaining power of a single customer.
but in the field of in cell touch.
because touch IC and drive IC are interrelated, and even specifications are mutually selective, it can be said that they are "both cooperative and antagonistic", Therefore, both touch IC manufacturers and driver IC manufacturers have stronger intention to master both at the same time.
3 R * n% A1 | 3 h / z7 x P: W V8 W8 I3 m2 R% T1 u6 `.
In this way, we can transform the complicated tripartite relationship among the panel factory, touch IC factory and drive IC factory into a simple two party relationship between the panel factory and the IC factory; at the same time, we can also slightly adjust the specifications of the two kinds of IC to increase the flexibility of the design under the overall requirements of display and touch.
2P / C * N2 P7 @) f6o5k5 N 'G1 T) H # g (w * ~ LCD on cell development depends on supplier input/ R  [.
J4 D4 j' F1 V8 T+ V7 Y1 g / Q; V -}, O1 l0 I R5 Z} Taiwan panel manufacturers have developed low, medium and high-level (LCD) on cell touch panel solutions for smart phone applications, covering one to five touch points, in the hope that they can meet the demands of thinner thickness, comparable touch performance and competitive price, Grab the mainstream market of external touch panel.
. The above plan has won the introduction of Chinese mainland brand and white label manufacturers into.
. Since the fourth quarter of 2013, it has been listed.
8 v%]: N1 R2 a (O).6 U3 B8 c; h% D2 X! S! _At present, there are still few suppliers of on cell touch panel and touch IC.
some solutions are even supplied by a single manufacturer. However, there are many suppliers related to thin-film touch panel. Touch panel and touch IC can be purchased freely, and at the same time, the price can be adjusted to meet the competition of on cell. Therefore, many system manufacturers prefer to adopt on cell touch solution, They are still conservative.
thereforeIn the short term, it will not be easy for on cell touch panel to achieve a significant market share in the field of smart phone applications.
in the near future, on cell touch panel will not be able to achieve a significant market share in the field of smart phone applications' h0 {" u) H* C/ t* p5 d" j% J6 f: _ 4 F4 n% J - {'E-Q' in cell supply chain closed# e$ {# x; t8 F+ ~& {9 b% a0 A: Q7 w- [& z" G: `- j. I* t  x& LCompared with the supply chain relationship of on cell touch panel, the supply chain relationship of in cell touch panel is significantly different from that of plug-in touch panel and on cell touch panel, It includes touch IC manufacturers taking panel manufacturers as customers, touch IC can only match the panels of specific customers, and touch IC and driver IC are interrelated! _ 2 F  D0 k+ \% @; D.
|" V6 m: j; `) u  C. `: t/ qAmong them, in cell touch IC can only match the panels of specific customers, and the required technology and manufacturing capacity will be more difficult than on cell touch IC, which will make in cell touch panel and touch IC suppliers quite limited, and in cell touch solutions are not easy to develop as on cell is diversified, but form a relatively closed industrial chain.
in addition, in cell touch IC can only match the panels of specific customers5 s- C! t5 `% g  m  s" w$ g" M" @+ a; r# ]4 g9 |% k8 ~It's also because of the high difficulty of in cell touch technology and manufacturing.
in cell touch technology and manufacturing are very difficultCompared with plug-in and on cell touch, it costs more in the early stage and takes longer time to improve yield. If it can't accumulate more sales, it will be difficult to make profits.
therefore, for panel manufacturers and IC manufacturers investing in in the field of in cell touch, how to obtain a strong access to the sea is a more important topic besides the technical layout.
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