Method and apparatus for improving gray-scale linearity of plasma display
A method and an apparatus for improving the gray-scale linearity of a plasma display. At least two types of gray-scale allocations are mixed for forming the original gray scale, or different gray scales are mixed to derive the original gray scale, so as to obtain the required brightness. Therefore, by using multiple combinations to adjust the original gray scale, the required brightness is obtained, and the gray scale linearity for all the gray scales is improved.
1. A method for improving gray-scale linearity of a plasma display, comprising:
receiving a plurality of gray scale input values in a field period; and
allocating each of the gray scale input values according to a first gray scale allocation and a second gray-scale allocation to obtain a first gray-scale allocation value and a second gray-scale allocation value;
storing the first gray-scale allocation values and the second gray-scale allocation values;
selecting one of the first gray-scale allocation value and the second gray-scale allocation value of the gray scale input value as an allocation value for a corresponding one of a plurality of sub-fields within the field period according to a required brightness; and
driving the plasma display by using the allocation values corresponding to the sub-fields within the field period.
2. The method according to claim 1 wherein a portion of the allocation values are formed from the gray scale input values allocated according to the first gray-scale allocation and the others of the allocation values are formed from the gray scale input values allocated according to the second gray-scale allocation.
3. The method according to claim 1 , wherein selecting the allocation values for the sub-fields is according to a vertical synchronous signal.
4. The method according to claim 1 , wherein selecting the allocation value for the corresponding sub-field is respectively performed on each of a plurality of pixels in the plasma display.
5. A method for improving gray-scale linearity of a plasma display, comprising:
receiving a plurality of gray scale input values in a field period; and
allocating each of the gray scale input values according to a first gray-scale allocation and a second gray-scale allocation to obtain a first gray-scale allocation value and a second gray-scale allocation value;
storing the first gray-scale allocation values and the second gray-scale allocation values;
obtaining an average allocation value of the first gray-scale allocation value and the second gray-scale allocation value of the gray scale input value for a corresponding one of a plurality of sub-fields within the field period; and
driving the plasma display by using the average allocation values corresponding to the sub-fields within the field period.
6. The method according to claim 5 , wherein selecting the allocation values for the sub-fields is according to a vertical synchronous signal.
7. The method according to claim 5 , wherein selecting the allocation value for the corresponding sub-field is respectively performed on each of a plurality of pixels in the plasma display.
8. An apparatus for improving gray-scale linearity of a plasma display, comprising:
a first gray-scale allocation apparatus and a second ray-scale allocation apparatus, for receiving a plurality of gray scale input values in a field period, allocating each of the gray scale input values according to a first gray-scale allocation in the first gray-scale allocation apparatus and a second gray-scale allocation in the second ray-scale allocation apparatus to respectively obtain a first gray-scale allocation value and a second gray-scale allocation value;
a control apparatus, to receive a vertical synchronous signal and a sequence pulse signal, and to output a control signal according to the vertical synchronous signal and the sequence signal; and
a multiplexer, under control of the control signal to receive and select one of the first gray-scale allocation value and the second gray-scale allocation value of the gray scale input value as an allocation value for a corresponding one of a plurality of sub-fields within the field period according to a required brightness, wherein the allocation values are used for driving the plasma display.
9. The apparatus according to claim 8 , wherein a portion of the allocation values are formed from the gray scale input values allocated according to the first gray-scale allocation and the others of the allocation values are formed from the gray scale input values allocated according to the second gray-scale allocation.
10. The apparatus according to claim 8 , further comprising a field memory for storing the allocation values the plurality of sub-fields within the field period; and a driving circuit, for driving the plasma display by using the allocation values.
11. The apparatus according to claim 8 , wherein the plasma display comprises a plurality of pixels, the allocation values of the pixels are arbitrarily changed.
12. An apparatus for improving gray-scale linearity of a plasma display, comprising:
a plurality of gray-scale allocation apparatuses, for receiving a plurality of gray scale input values in a field period, allocating each of the gray scale input values according to a plurality of gray-scale allocations in the gray-scale allocation apparatuses to respectively obtain a plurality of gray-scale allocation values;
a control apparatus, to receive a vertical synchronous signal and a sequence pulse signal, and to output a control signal according to the vertical synchronous signal and the sequence signal; and
a multiplexer, under control of the control signal to receive and select one of the gray-scale allocation values of the gray scale input values as allocation values for a plurality of sub-fields within the field period according to a required brightness, wherein the allocation values are used for driving the plasma display.
13. The apparatus according to claim 12 , further comprising a field memory for storing the allocation values the plurality of sub-fields within the field period; and a driving circuit, for driving the plasma display by using the allocation values.
14. The apparatus according to claim 12 , wherein the plasma display comprises a plurality of pixels, the allocation values of the pixels are arbitrarily changed.