Tag: Display Technology Touch Technology
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Display technology is a face project, which restricts the development of mobile devices, computers and other terminal devices in terms of appearance, function and price. The iPhone was able to swept the world with just one touch, and the power of display technology is evident. At the 2009 Mobile Handheld Display Technology Conference held at the Creative Times Exhibition, the author got a lot of useful information about display technology, and I will share it with you.
Touch technology leads the trend, piezoelectric multi-touch technology debut
When it comes to touch technology, I still have to mention Apple. Although more than 10 touch display technologies such as resistive, capacitive, surface acoustic wave, infrared, and optical have been used in the industry for many years, their market is always in a kind of market. In a harmonious state, terminal manufacturers take their own needs according to their respective applications. No one is the most prominent, and no one has the most promising future. Until the emergence of the iPhone, completely broke the "harmonious" market structure.
The smart Apple optimizes the voltage touch technology, and converts the capacitive signal into a current signal to achieve multi-touch on the capacitive touch technology, coupled with the iPhone's dazzling UI, which greatly promotes the touch technology in the mobile phone. The popularity of consumer electronics terminals. Capacitive touch technology has also been greatly optimistic.
At this mobile handheld display technology conference, Sitronix "piezoelectric multi-touch technology" caused a lot of attention.
On the piezo multi-touch platform, you can track the touch trajectory of multiple fingers, and you can write different texts according to the force of your fingers. In addition, the company's touch-type electronic mixers, touch-type electronic pianos and other applications are also very impressive.
Qian Jinwei, deputy general manager of Yuchuang Electronics Co., Ltd., analyzed the following advantages of piezoelectric multi-touch technology:
Compared with traditional resistive touch technology:
1. The upper and lower plates of the piezoelectric multi-touch technology do not need to use the loop mode to keep the current on. When there is no touch action, the touch screen does not consume power. Therefore, the power consumption is much lower than the conventional resistor. Touch technology.
2. When implementing multi-touch under the traditional resistive touch technology, if the two points touched are too close, the resistance sensor has no way to distinguish whether it is a point or two points. Piezoelectric multi-touch technology can accurately track every touch track.
Compared with capacitive touch technology:
1. Capacitive touch screens need to be operated with fingers, while piezoelectric multi-touch technology supports any kind of material such as fingers, pens, cards, etc., and can also be operated with gloves.
2. Under capacitive multi-touch technology, the panel must be kept clean, any dirt, even the static electricity carried by the mist may cause misoperation, and the piezoelectric multi-touch technology relies on pressure for contact recognition. Stains do not affect.
3. Capacitive multi-touch is often used in so-called "ghost points", while piezoelectric multi-touch technology does not, greatly improving the accuracy.
So, what is the mystery of piezoelectric multi-touch technology with so many advantages? Qian Jinwei said that the innovation of LCD driver technology has applied LCD driver technology innovation to touch technology. Multi-touch technology is to obtain contact signals by means similar to LCD scanning. Since the scanning frequency is up to 200 Hz, the contact information can be quickly obtained in real time, and the coordinates can be accurately calculated by the dedicated MCU and DSP to give a signal.
At present, the pie-chip multi-touch solution of the single chip supports a 2-inch to 10.1-inch LCD screen, while the chipset solution supports a 15.4-inch LCD screen. "Screen size is not a problem." Qian Jinwei said confidently, "Our slogan is: 2 inches to 100 inches are supported! This is one of our subsequent development goals."
What is the market prospect of this new multi-touch technology? Qian Jinwei has revealed that there are already manufacturers in Europe using their piezoelectric multi-touch technology. Their solutions have been delivered to some vendors for development and testing through FPGAs. Next month, engineering samples of related programs will be released soon. It is expected that mass production will be produced in the fourth quarter of 2009 or the first quarter of 2010.
At present, in addition to promoting the technology among mobile phone manufacturers, Yuchuang is also in contact with game makers such as Nintendo and Sony. For the upcoming Windows 7 operating system optimized for multi-touch functions, the company is also actively preparing for the relevant certification work. I believe that with Windows 7, multi-touch technology will be another application climax. At that time, is the market still only tilting toward capacitive multi-touch, or is it only costing 80% of the new multi-touch multi-touch popularity of capacitive multi-touch solutions? Let us wait and see.
Emerging display technology has a long way to go
As the market for smartphones, netbooks, MIDs, and notebooks continues to heat up, the shipments of small and medium-sized displays will continue to grow.
Zill Li, a mobile display specialist at Chemlmage Corporation, points out that the appearance and performance of the display have the most direct impact on the application. According to market demand, the following emerging display technologies are expected to achieve great development:
1. A virtual display technology that can be worn on the head. Using this technology, people can browse images by wearing glasses. This display technology allows users to get a large screen visual experience, high resolution, and low power consumption through a small screen. The UI is currently the biggest technical challenge encountered by the technology, such as how to control the input and output signals, volume, viewing time and adjust the visual comfort.
2. Foldable display technology. By folding, you can make the 5.5-inch screen only look like a 3.5-inch screen. This display technology allows the user to select a large screen or a small screen at will. The biggest challenges currently encountered by this technology are the processing at the screen and screen seams, FOS parameter adjustments, and the trade-offs between screen size and application.
3. Curlable display technology. By curling the screen, our small-sized terminal devices can also have large displays, and the design of the terminals will be more flexible. The biggest challenge currently encountered by this technology is the immature floor and color performance.
4. Enter the projection display technology. Using this display technology, the keyboard or the like of the terminal can be projected onto the tablet, and the user performs input processing on the projection. At present, this technology is still only an idea, how to achieve it, and there is still a long way to go.
5. Output projection display technology. The components and industry chain of this technology are mature, but the power consumption, cost, and security integrated into devices such as mobile phones are all issues to consider.
6. Bistable display technology. Cholesteric displays and electrophoretic displays have been used to varying degrees. The low power consumption of this technology is commendable, but for portable multimedia devices, its driver and color display are the current bottlenecks.
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