Development of IPS LCD with Integrated Touch-Panel by Hitachi Displays
Hitachi Displays has made an announcement on development of IPS LCD display with integrated touch panel. IPS (In-Plane Switching Display) is a LCD technology that aligns the liquid crystal cells in a horizontal direction. In IPS LCD display two transistors are required in order to apply electrical field to each and of the crystal instead of one single transistor needed for a standard TFT display. This will provide a more viewing angle as suppose to older LCD screens on mobile phones that had a 35 degree of viewing angle. The new display by Hitachi Displays is equipped with projection-type electrostatic capacitance touch panels, adding a capability of multi-touch functions by merely touching lightly the screen as well as expanding images or moving onscreen items using multiple fingers. Hitachi Display’s integrated touch-panel eliminates the need for a glass substrate, resulting in a thinner LCD and much lighter and thinner mobile phones, supporting multi-touch operations. Read more
Development of Projection-Type Electrostatic Capacitance Touch Panel by Hitachi Display
Widely use of touch panels both in smart phone and digital cameras will continue to play an important role in maintaining the high growth rate of this technology. Recently, the projection type electrostatic capacitance touch panels are gaining in popularity for allowing only a very light touch, not mentioning their multi-touch operations capability. Up to now, the projection-type electrostatic capacitance touch-panels produced a mild electric current on the surface of the LCD, where it detects changes in the electric current to determine where the user’s fingers is touching the display. However, in such scenario, non-conductive objects such a plastic stylus or a gloved hand could not be used since they have no effect on electric current. To overcome this, Hitachi Display has developed a projective-type electrostatic capacitance touch-panel capable of converting input from a non-conductive object into electrostatic capacitance, allowing use of plastic stylus and gloved hands or other similar objects on this type of display. The new technology is capable of detecting both conductive as well as non-conductive objects, all without compromising responsiveness to light touch or design considerations. Read more
