Patent Number: 6,396,471

Title: Color liquid crystal display device and image display method thereof

Abstract: There is disclosed a color liquid crystal display (LCD) device capable of displaying color images in response to direct entry of input data and/or instructions through operation of an associated coordinate pointing tool. Typically, this tool is a pen-like input device known as the "input pen" for use in determining the individual position for color display on the screen of a built-in LCD panel. A coordinate detector operates to recognize the position as designated by the input pen, generating and issuing an output signal indicative of the corresponding coordinate data. A color designator circuit designates a color as presently selected for color display. A memory device stores therein color data representative of the color designated. A memory controller is responsive to receipt of an address issued from the selected coordinate data for controlling the color data to be written into and read out of the memory. An output controller allows the color data read from the memory to be supplied to the LCD display screen as video data.

Inventors: Hirakata; Yoshiharu (Kanagawa, JP)

Assignee: Semiconductor Energy Laboratory Co., Ltd.

International Classification: G06F 3/033 (20060101); G09G 3/36 (20060101); G09G 003/36 ()

Expiration Date: 05/28/2019