News Release: The former Hitachi Displays

September, 24 2010

Development of IPS LCD with Integrated Projection-type Electrostatic Capacitance Touch-panel
- Thinner LCD with Excellent Detection Performance -

Hitachi Displays, Ltd. (President: Yoshiyuki Imoto, hereafter referred to as Hitachi Displays) has developed an IPS LCD with an integrated touch panel formed as a projection-type electrostatic capacitance touch-panel layer located on the color filter substrate of the IPS LCD. The development of this IPS LCD with an integrated touch-panel eliminates the need for a glass substrate specialized for touch panel usage, and accordingly has made it possible to make the LCD thinner, resulting in much thinner mobile phones and smart phones that are equipped with touch-panels that support multi-touch operation. Improvements to the drive system and the inclusion of independent software provide excellent detection performance.

Amid the addition of advanced functions for portable devices, such as tablet PCs and smart phones, the adoption of touch-panels capable of intuitive operation has increased and it is thought that portable units equipped with touch panels will only continue to have a high level of growth. Expansion is especially expected for the equipping of projection-type electrostatic capacitance touch-panels as these are noted for their capability of multi-touch functions such as ease-of-use operation by merely touching lightly, and expanding images or moving onscreen items using multiple fingers. Additionally, due to the demand for multi-functionality and design considerations, all LCD manufacturers have advanced in the development of LCDs with integrated touch-panels that allow for the production of thinner LCDs. However, in conventional LCDs with integrated touch-panels, there is only a small distance separating the detection electrode components on the color filter glass substrate and the LCD pixels area, and this results in being affected by noise, and consequently causes the problem of reduced detection performance during reception.

Accordingly, the Hitachi Displays has developed an IPS LCD with an integrated touch-panel that provides the same detection performance (detection error of ±1.0 mm or less) of conventional projection-type electrostatic capacitance touch-panels with separated touch-panels and LCDs. This detection performance is due to an improved LCD drive system as well as the inclusion of an independently developed algorithm (calculation method) for the touch-panel control software, and the improved performance has reduced the affects of noise on the touch panel to half or less that of conventional units.

Hitachi Displays has also successfully developed an electrostatic capacitance touch-panel* that can be operated with a plastic stylus, gloved hand, or other non-conductive object. We will continue to expand our touch-panel product lineup as we also strive to improve development and sales of such small- and medium-size LCDs with a high level added value. Hitachi Displays shall also continue to advance in terms of customer support including touch-panel control systems as a means to contribute to the development of products for our customers.

This newly developed IPS LCD with integrated touch-panel will be on display at CEATEC 2010 held at the Makuhari Messe International Convention Complex from Oct. 5 to 9.

※ Aug. 27, 2010 Press Release: Development of Electrostatic Capacitance Touch-panel that can be Operated with a Plastic Stylus, Gloved Hand, or other Non-Conductive Object