After the panel factory put down the body and cooperated with the touch IC factory to develop the On-Cell touch screen, the technical problems of On-Cell commercialization were temporarily alleviated. Because On-Cell has obvious advantages in structure and optics, it has given the panel factory strong confidence in the previous period. Almost all panel manufacturers have accelerated the development and mass production of On-Cell touch screen. pace.
However, the reality is that the On-Cell touch display market has not broken out like the panel maker's will, and there are not many end-users to open programs, and there are not many mass productions. On-Cell touch screen display in the terminal market is sluggish, so that its price is also quickly loosened, but it has become a foil for customers with traditional GFF and OGS touch screens.
Seemingly easy, practically difficult
From the perspective of the GG structure capacitive screen purchased by Apple iPhone, the GG capacitive screen has obvious advantages in material cost. Due to the high processing cost, the price has not dropped much. This is also the F-TPK Haohong 2014 first quarter report period. It is still possible to achieve operating income of NT$26.618 billion (about RMB5.51 billion).
On the one hand, On-Cell's sensor sensing line processing flow is similar to the Apple iPhone's GG structure capacitive screen sensor sensing line processing process, which is to be double-sided processing. The On-Cell substrate is a much more expensive display than the G sensor substrate compared to the GG-structured capacitive screen with low processing yield.
On the other hand, in order to avoid the patent of Apple GG double-sided ITO capacitive screen, most On-Cell lines do not use the sensor circuit on both sides of the CF substrate of the display screen, but use the outer surface of the finished display box to make the hair. The sensor circuit of the insect process, but most manufacturers have looked down on the yellow light difficulty of the caterpillar process.
According to industry sources, many panel factories do not use too much investment cost, and do not have the yellow light equipment as good as the panel factory to make On-Cell sensing lines, plus the equipment selection and production control, and lack of The processing experience of other processes of the capacitive screen, in the actual production and processing, the yield of the caterpillar yellow light sensor is not necessarily higher than the yield of the production of double-sided ITO G sensor.
Can't enter the high-end brand certification system
It is understood that even the GG or OGS structure capacitive screen using the caterpillar process has not yet entered the high-end brand certification system because of the problem of reporting accuracy and reaction speed.
The On-Cell product, which also uses the caterpillar process, is more difficult to handle noise than GG or OGS because it is closer to the LCD TFT driver layer, and it is also difficult to enter the high-end brand certification.
The price is very good
Since there is no influence of high-end brands to drive the entire market, the On-Cell of the caterpillar process has not yet formed a batch, and in the low-end market, it has fallen into a low-price competition vortex with GF and caterpillar GG structure.
It is understood that the current caterpillar On-Cell touch screen display also needs to be fully fitted to reflect some optical and thickness advantages, but in the operational experience level can not match the GFF, caterpillar process GG or OGS structure capacitive screen.
Therefore, there is no need for a fully-fitting product, and the On-Cell touch screen display will not be considered, but a caterpillar process GG or OGS structure capacitive screen will be selected; a fully-fit product, a caterpillar process On-Cell touch screen display The operating experience, without the ultra-thin GFF structure of the capacitive screen is good, the price is only higher than the ultra-thin GFF structure of the capacitive screen, no one is willing to adopt the caterpillar process On-Cell touch screen.
That is to say, from the perspective of the customer's use value, the On-Cell product of the caterpillar process is not as good as the ordinary process of the capacitive screen product; from the perspective of the purchase cost of the customer, the cost of the On-Cell process of the caterpillar process is much higher than The cost of common process capacitive screen products.
Bridge process On-Cell cost or higher
The On-Cell touch screen display of the caterpillar process is unfavorable, and many panel factories are attributed to the fact that the operating experience is worse than GGF, thus accelerating the development of the On-Cell touch display product of the bypass process.
However, similar to the On-Cell touch screen display technology of the caterpillar process, the processing difficulty of the bridge process itself is not low, and the yield is not higher than that of the ordinary GG and GFF touch screen products, and the processing cost is still difficult to come down; In the early stage, the high-yield cost of the sensing sensor circuit on the display screen was created, and the processing cost of the whole product would remain high. If the cost of after-sales is recalculated, it will be harder to say clearly what the end-user's overall project advantage is.
Yield becomes the obstacle of On-Cell
Unless the panel factory finds a lower cost, higher yield production and processing method, even the On-Cell touch screen with the bridge technology, the operating experience of the product reaches the level of GG and GFF touch screen, much higher than GG and The processing cost of GFF touch screen products will still be the biggest obstacle to the promotion of On-Cell touch screen.
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