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US 8,154,562 B2Granted
Method and arrangement for improving the grayscale resolution of a monochrome monitor
AssigneeEIZO Corporation
InventorAndreas Kaercher
Life of this patent
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Abstract
A method and an arrangement for improving the digital-signal-generated grayscale resolution of a monochrome visual display unit (3) to which the digital signals from an image source (1) can be supplied over n-bit wide RGB channels (2). Measures are proposed that make it possible to display distinguishable grayscale gradations on the visual display unit (3) regardless of whether a grayscale signal (6; 10) or RGB color signals (12, 13, 14) are transmitted to the visual display unit (3).
Claims9
A method for improving digital-signal-generated grayscale resolution of a monochrome visual display unit, to which digital signals from an image source are supplied over n-bit-wide RGB channels, comprising:
- generating with an encoding device of the image source n-bit-wide RGB color signals for transmission of an input m-bit-wide grayscale signal over the RGB channels, m being larger than n, the encoding device being configured to form each of the RGB color signals from the bit values of n−1 bit locations (D9, D8, . . . , D3) of the input m-bit-wide grayscale signal, such that the bit values of the n−1 bit locations of each of the R color signal, the G color signal and the B color signal match to the bit values of n−1 bit locations (D9, D8, . . . , D3) of the input m-bit-wide grayscale signal, and that the bit value of the only remaining one bit location of each of the R color signal, the G color signal, and the B color signal match to the bit value of only one of the remaining bit values of m−(n−1) bit locations (D2, D1, D0) of the input m-bit-wide grayscale signal, wherein all of the remaining bit values m−(n−1) bit locations (D2, D1, D0) of the input m-bit-wide grayscale signal are used among each of the R color signal, the G color signal, and the B color signal;
- generating with a decoding device of the monochrome visual display unit an output m-bit-wide grayscale signal from the received n-bit-wide RGB color signals, the decoding device being configured to form bit values for n−1 bit locations of the output m-bit-wide grayscale signal from the bit values of n−1 bit locations of the n-bit-wide RGB color signals according to a processing rule, and to supplement these n−1 bit locations by the respective bit value of the remaining bit locations of the respective n-bit-wide RGB color signal;
- and
- displaying with the monochrome visual display unit the output m-bit-wide grayscale signal.
1 more element
An arrangement improving digital-signal-generated grayscale resolution, comprising:
- a monochrome visual display unit;
- an image source, which supplies digital signals to the monochrome visual display unit over n-bit-wide RGB channels;
- an encoding device of the image source generating n-bit-wide RGB color signals for transmission of an input m-bit-wide grayscale signal over the RGB channels, m being larger than n, the encoding device being configured to form each of the RGB color signals from the bit values of n−1 bit locations (D9, D8, . . . , D3) of the input m-bit-wide grayscale signal, such that the bit values of the n−1 bit locations of each of the R color signal, the G color signal and the B color signal match to the bit values of n−1 bit locations (D9, D8, . . . , D3) of the input m-bit-wide grayscale signal, and that the bit value of the only remaining one bit location of each of the R color signal, the G color signal, and the B color signal match to the bit value of only one of the remaining bit values of m−(n−1) bit locations (D2, D1, D0) of the input m-bit-wide grayscale signal, wherein all of the remaining bit values m−(n−1) bit locations (D2, D1, D0) of the input m-bit-wide grayscale signal are used among each of the R color signal, the G color signal, and the B color signal;
- and
- a decoding device of the monochrome visual display unit for generating an output m-bit-wide grayscale signal from the received n-bit-wide RGB color signals, the decoding device being configured to form bit values for n−1 bit locations of the output m-bit-wide grayscale signal from the bit values of n−1 bit locations of the n-bit-wide RGB color signals according to a processing rule, and to supplement these n−1 bit locations by the respective bit value of the remaining bit locations of the respective n-bit-wide RGB color signal, wherein the monochrome visual display unit displays the output m-bit-wide grayscale signal.
2 more elements
An arrangement for transmitting a grayscale signal and a color signal comprising:
- an image source;
- a monochrome visual display unit;
- and
- RGB channels;
- wherein the image source comprises an application program for generating a grayscale signal, an application program for generating a color signal, and an encoding device that generates n-bit wide RGB color signals for transmission of an input m-bit-wide grayscale signal over the RGB channels, m being larger than n, the encoding device being configured to form each of the RGB color signals from the bit values of n−1 bit locations (D9, D8, . . . , D3) of the input m-bit-wide grayscale signal such that the bit values of the n−1 bit locations of each of the R color signal the G color signal and the B color signal match to the bit values of n−1 bit locations (D9, D8, . . . , D3) of the input m-bit-wide grayscale signal and that the bit value of the only remaining one bit location of each of the R color signal the G color signal and the B color signal match to the bit value of only one of the remaining bit values of m−(n−1) bit locations (D2, D1, D0) of the input m-bit-wide grayscale signal wherein all of the remaining bit values m−(n−1) bit locations (D2, D1, DO) of the input m-bit-wide grayscale signal are used among each of the R color signal the G color signal and the B color signal;
- wherein the monochrome visual display unit comprises a decoding device that generates an output m-bit-wide grayscale signal from the received n-bit wide RGB color signals, the decoding device being configured to form bit values for n−1 bit locations of the output m-bit-wide grayscale signal from the bit values of n−1 bit locations of the n-bit-wide RGB color signals according to a processing rule, and to supplement these n−1 bit locations by the respective bit value of the remaining bit locations of the respective n-bit-wide RGB color signal;
- wherein the input m-bit-wide grayscale signal is encoded and transmitted from the image source to the monochrome visual display unit via the RGB channels with the bit width of the color signal, and
- wherein the output m-bit-wide grayscale signal is decoded after a transmission via the RGB channels by the decoding device and converted to a decoded signal having the bit width of the output m-bit-wide grayscale signal, and wherein the monochrome visual display unit displays the decoded grayscale signal.
5 more elements
Dependencies are inferred from the claim text.