Image quality improving method for color plasma display screen

A plasma display screen and image quality technology, applied in static indicators, instruments, identification devices, etc., can solve the problems of fixed number of subfields, appearance of false contours, increased cost, etc., and achieve the effect of weakening false contours

Inactive Publication Date: 2008-01-16
四川世纪双虹显示器件份有限公司
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Problems solved by technology

However, the above method has the following defects: the adaptive brightness control method mainly calculates the average brightness of several fields to adjust the number of subfields, and the number of subfields is still fixed for each field
The method of adjusting the display order of the subfields is to disrupt the order of the subfields. This method can only reduce the phenomenon of false contours that are prone to appear in some occasions, but it will cause false contours to appear in other occasions.
The compensating pulse method is to reduce the false contour phenomenon by increasing the number of sustain pulses in some subfields, but the local image will be distorted
The error diffusion method is a method that is widely used at present. This method mainly has a relatively large amount of calculation, requires a very large storage space, and needs to expand the external memory, which increases the cost.

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  • Image quality improving method for color plasma display screen
  • Image quality improving method for color plasma display screen
  • Image quality improving method for color plasma display screen

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Embodiment Construction

[0012] The content of the present invention will be specifically described below in conjunction with the accompanying drawings and embodiments.

[0013] Referring to Fig. 1, the method of the present invention is, for each coding p of each gray level ij , first follow d mpd =|P i -P j |×SP T -|i-j| calculates this encoding with all other encodings p k MPD value, where: d mpd is the MPD value, P i ,P j is the code of gray level i, j, SP T is the transpose of the weight vector, i, j are gray levels. Second, judge all d mpd Whether the value is greater than the given threshold D, if d mpd is greater than the threshold D, select the adjacent gray code, if d mpd If it is less than the threshold D, select d mpd The minimum value of d min(mpd) Corresponding code, finally output the selected code.

[0014] Figure 1, p ij It is the jth code with the gray level i output by the previous display unit, p k For all codes whose gray level is k input after error diffusion proc...

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Abstract

The invention discloses a method for improving image quality of colorful plasma display screen which comprises: searching codes of similar luminous mode in different gradations of grey to make the MPD value minimum in adjacent display units of moving image, and making forms with error diffusion method to make the luminous modes of adjacent display units as same as possible to diminish false profile and improve image quality.

Description

technical field [0001] The invention relates to a method for improving image quality, in particular to a method for improving image quality of a color plasma display screen. Background technique [0002] The color plasma display screen is to apply voltage on the sustain electrodes X, Y and address electrode A, and use the surface discharge of the electrodes to excite the phosphor to emit light to realize image display. Its grayscale display adopts addressable display separation subfield technology (ADS technology), that is, one field is divided into eight subfields, and each subfield is divided into a reset period, an address period and a sustain period. [0003] Pseudo-contour phenomenon is a kind of visual image distortion due to the integration effect of human eyes and the combination of ADS technology. At present, various methods have been proposed to reduce the influence of dynamic false contours on image display, such as adaptive brightness control method, dividing la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/28G09G3/20H01J17/49G09F9/313G09G3/288
Inventor 郭应锋刘洋王付生徐曼
Owner 四川世纪双虹显示器件份有限公司
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