Claims
- 1. A multiple-tone display system for providing multiple-tone representations, the display system comprising:a display panel having a plurality of groups of pixels arranged in a dot matrix, each group including a red (R) pixel, a green (G) pixel, and a blue (B) pixel and composing one dot on the display panel; a source of N-bit display data representing 2N multiple tones; a voltage generator which provides 2N voltage levels corresponding with the 2N tones; and a driver which for each pixel receives N-bit digital display data, provides a display voltage value from the 2N voltage levels in accordance with the received N-bit digital display data, and outputs the display voltage value to the display panel to cause the display panel to display at one of the pixels a tone corresponding to the display voltage value; wherein the maximum intensity represented by the N-bit digital display data is equal to the maximum intensity which the display panel is capable of showing, the minimum intensity represented by the N-bit digital display data is equal to the minimum intensity which the display panel is capable of showing, and each of the intensities of remaining tones displayed at a pixel in response to a display voltage level is greater than the corresponding intensity on a straight line linking the maximum intensity and the minimum intensity when the intensities of the 2N multiple tones are plotted on a graph having the multiple tones along its abscissa and the intensities on a logarithmic scale along its ordinate.
- 2. A multiple-tone display system as claimed in claim 1, wherein the display panel is a liquid crystal display panel.
- 3. A multiple-tone display system for providing multiple-tone representations, the display system comprising:a display panel having a plurality of groups of pixels arranged in a dot matrix, each group including a red (R) pixel, a green (G) pixel, and a blue (B) pixel and composing one dot on the display panel; a source of N-bit display data representing 2N multiple tones; a voltage generator which provides 2N voltage levels corresponding with the 2N tones; and a driver which for each pixel receives N-bit digital display data, provides a display voltage value from the 2N voltage levels in accordance with the received N-bit digital display data, and outputs the display voltage value to the display panel to cause the display panel to display at one of the pixels a tone corresponding to the display voltage value; wherein the maximum intensity represented by the N-bit digital display data is equal to the maximum intensity which the display panel is capable of showing, the minimum intensity represented by the N-bit digital display data is equal to the minimum intensity which the display panel is capable of showing, and each of the intensities of remaining tones displayed at a pixel in response to a display voltage level is at least as great as the corresponding intensity on a straight line linking the maximum intensity and the minimum intensity when the intensities of the 2N multiple tones are plotted on a graph having the multiple tones along its abscissa and the intensities on a logarithmic scale along its ordinate.
- 4. A multiple-tone display system as claimed in claim 3, wherein the display panel is a liquid crystal display panel.
Priority Claims (1)
Number |
Date |
Country |
Kind |
4-39203 |
Feb 1992 |
JP |
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Parent Case Info
This application is a continuation of application Ser. No. 09/080,234 filed May 18, 1998, now U.S. Pat. No. 6,100,864, which is a continuation application of Ser. No. 08/813,387 filed Mar. 7, 1997, now U.S. Pat. No. 5,786,798, which is a continuation application of Ser. No. 08/486,291 filed Jun. 7, 1995, now U.S. Pat. No. 5,610,626, which in turn was a division of application Ser. No. 08/018,494 filed Feb. 17, 1993, now U.S. Pat. No. 5,495,287.
US Referenced Citations (8)
Foreign Referenced Citations (2)
Number |
Date |
Country |
53-148918 |
Dec 1978 |
JP |
64-311198 |
Feb 1989 |
JP |
Continuations (3)
|
Number |
Date |
Country |
Parent |
09/080234 |
May 1998 |
US |
Child |
09/459341 |
|
US |
Parent |
08/813387 |
Mar 1997 |
US |
Child |
09/080234 |
|
US |
Parent |
08/486291 |
Jun 1995 |
US |
Child |
08/813387 |
|
US |