| 摘要 |
A display apparatus includes a plurality of scanning lines and data lines and, at each intersection of said data lines and scanning lines, an electrochromic pixel element and a sensor element connected to the pixel element. The sensor element is sensitive to a user's graphical input, which changes a charge state of the respective pixel element. The display apparatus also includes a control means, which is configured to allow the pixel element to be selectively set to a first charge state corresponding to a first display state, or to a second charge state corresponding to a second display state. The second display state reflects the user's graphical input. The second charge state of the pixels may be brought about by exposing the sensor elements to light from a light pen or to a magnetic field from a magnetic pen, the pen being drawn across the display screen of the apparatus. Due to the direct action of the sensor elements in modulating the charge on the pixel elements, it is possible to display an image drawn on the screen instantly, without the need to scan the display to determine which pixels have changed their initial charge. This reduces the power consumption of the apparatus.
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