CN110277071A - Electrowetting low power image display methods based on human-eye visual characteristic - Google Patents
Electrowetting low power image display methods based on human-eye visual characteristic Download PDFInfo
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- CN110277071A CN110277071A CN201910707371.6A CN201910707371A CN110277071A CN 110277071 A CN110277071 A CN 110277071A CN 201910707371 A CN201910707371 A CN 201910707371A CN 110277071 A CN110277071 A CN 110277071A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/348—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on the deformation of a fluid drop, e.g. electrowetting
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
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Abstract
The electrowetting low power image display methods based on human-eye visual characteristic that the present invention relates to a kind of, comprising the following steps: step S1: acquisition original image grey level histogram；Step S2: grey scale curve is differentiated according to human eye, constructs high gray scale grade interval A and low ash degree grade interval B；Step S3: according to original image grey level histogram, introduce adjustable factors K, so that the pixel quantity of high gray scale grade interval A is original K times after amendment, and the pixel quantity of high gray scale grade interval A reduction is increased in the section B, obtains revised image grey level histogram；Step S4: revised image grey level histogram and original image grey level histogram are matched, the grey level histogram after being matched；Step S5: according to the grey level histogram after matching, image is shown in electrowetting electronic paper display.The present invention is based on human-eye visual characteristic, the display effect that image is kept while limiting power consumption can be realized.
Description
Technical field
The present invention relates to display technology fields, and in particular to a kind of electrowetting low-power consumption figure based on human-eye visual characteristic
As display methods.
Background technique
In recent years, electrowetting electric paper display is concerned due to its wide viewing angle, high reflectance, high contrast etc..
Compared to electrophoretic electronic paper display, electrowetting electric paper display possesses the faster speed of response and richer color,
The features such as full color video plays can be achieved, become the focus on research direction of electric paper display of new generation.
Electrowetting display panel is composed of electrowetting pixel unit one by one, and each pixel unit includes upper and lower base
Plate (ito glass), pixel wall, water, ink, drain insulating layer and transparent electrode etc. change when applying voltage on the electrode
Interfacial tension between ink and insulating layer makes ink that expansion occur or shrink, and then changes display effect.Aperture opening ratio is table
The index for telling this feature refers to that the area of white substrate under exposing when pixel is in " opening " state accounts for entirely
The percentage of elemental area.By changing the voltage applied, the variation of pixel aperture ratio can be controlled, is showed to change
The visual effect come is based on this characteristic, to obtain high gray scale pixels, needs to apply bigger voltage, to expend more
Energy.
Before this, people mainly change the technological means such as refresh rate, Dependent Compiler Optimization Technology, image procossing by dynamic to limit
Power consumption.Dynamic changes refresh rate by improving refreshing frame per second in high frame per second picture to keep display effect, drops in low frame per second picture
Low refresh rate limits power consumption, however when reducing refresh rate, due to effects such as the ink reflux of electrowetting, charge-trappings, by
Elongated in the refresh cycle, the reflux of ink can seriously affect last display quality, and the effect is unsatisfactory.Image procossing is main
It is the method based on histogram modification, the intermediate grey scales conduct subtracted each other using highest tonal gradation and minimum tonal gradation
Threshold value divides the threshold value of height tonal gradation and does not meet the visual perception of human eye, the image often shown compared to
Original image is obviously dimmed, and visual effect is undesirable.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of, the electrowetting low power image based on human-eye visual characteristic is aobvious
Show method, can be realized the display effect for keeping image while limiting power consumption.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of electrowetting low power image display methods based on human-eye visual characteristic, comprising the following steps:
Step S1: acquisition original image grey level histogram；
Step S2: grey scale curve is differentiated according to human eye, constructs high gray scale grade interval A and low ash degree grade interval B；
Step S3: according to original image grey level histogram, introducing adjustable factors K, so that high gray scale grade interval A after amendment
Pixel quantity is original K times, and the pixel quantity of high gray scale grade interval A reduction is increased in the section B, after obtaining amendment
Image grey level histogram；
Step S4: revised image grey level histogram and original image grey level histogram are matched, after being matched
Grey level histogram；
Step S5: according to the grey level histogram after matching, image is shown in electrowetting electronic paper display.
Further, the electrowetting electronic paper display pixel unit includes the base up and down set gradually under upper
Plate, as water, ink, drain insulating layer, transparent electrode and substrate；The ink both ends are provided with pixel wall.
Further, the step S2 specifically:
Step S21: human eye resolution grey scale curve is divided into four parts, is fitted to four sections of straight lines, respectively
Wherein, Y is human eye to gray scale resolution capability value, and i is gray scale value；
Step S22: according to default human eye to gray scale resolution capability value, being calculated by above formula when each gray scale value, will
Section greater than maximum gray scale value is set as high gray scale grade interval A, will be greater than minimal gray value and siding-to-siding block length and the section A
The identical section of length is set as low ash degree grade interval B；
Further, the step S4 specifically: according to original image grey level histogram, adjustable factors K is introduced, so that amendment
The pixel quantity of high gray scale grade interval A is original K times afterwards, and the pixel quantity of high gray scale grade interval A reduction is increased
In the section B, revised image grey level histogram is obtained；
If Y=2, histogram modification formula such as (1) is shown,
Wherein, i is tonal gradation variable, and Histi represents former histogram, and Hist ' i is revised histogram.
Further, the step S4 specifically:
Step S41: according to formula (2) and (3), count respectively amendment front and back histogram it is cumulative and
Wherein Hist1, sr, r respectively indicate the histogram, cumulative and area and maximum tonal gradation of original image, Hist2, G
(z), z add up after histogram, amendment after respectively indicating amendment and area and amendment after maximum tonal gradation；
Step S42: the inverse function of (3) formula is found out, according to zr=G-1(sr) the updated value zr of gray scale is obtained, it can be obtained
Grey level histogram after matching.
Compared with the prior art, the invention has the following beneficial effects:
The present invention is based on human-eye visual characteristic, the display effect that image is kept while limiting power consumption can be realized.
Detailed description of the invention
Fig. 1 is electrowetting electronic paper display pixel cellular construction figure of the present invention；
Fig. 2 is voltage in one embodiment of the invention-aperture opening ratio curve；
Fig. 3 be in one embodiment of the invention human eye to gray scale resolution capability；
Fig. 4 is original image and original image histogram in one embodiment of the invention；
Fig. 5 is traditional low-power consumption algorithm pattern and its histogram in one embodiment of the invention；
Fig. 6 is the low-power consumption algorithm pattern and its histogram in one embodiment of the invention based on human-eye visual characteristic.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and embodiments.
Fig. 1 is please referred to, the present invention provides a kind of electrowetting low power image display methods based on human-eye visual characteristic, packet
Include following steps:
Step S1: acquisition original image grey level histogram；
Step S2: grey scale curve is differentiated according to human eye, constructs high gray scale grade interval A and low ash degree grade interval B；
Step S3: according to original image grey level histogram, introducing adjustable factors K, so that high gray scale grade interval A after amendment
Pixel quantity is original K times, and the pixel quantity of high gray scale grade interval A reduction is increased in the section B, after obtaining amendment
Image grey level histogram；
Step S4: revised image grey level histogram and original image grey level histogram are matched, after being matched
Grey level histogram；
Step S5: according to the grey level histogram after matching, image is shown in electrowetting electronic paper display.
In the present embodiment, the electrowetting electronic paper display pixel unit include set gradually under upper up and down
Substrate, as water, ink, drain insulating layer, transparent electrode and substrate；The ink both ends are provided with pixel wall.
In the present embodiment, be trend of the human eye to gray scale resolution capability as shown in Figure 3, image grayscale grade it is very low or
In the very high situation of person, the ability that human eye differentiates gray scale is weaker, such as human eye can only perceive 0 grade of ash near 0 grade of gray scale
Degree and the differences of 8 grades of gray scales, and all cannot be distinguished in 0 grade of gray scale to all tonal gradations between 7 grades.And in middle gray etc.
Grade, the ability that human eye differentiates gray scale are just stronger.As seen from the figure, human eye is nonlinear to gray scale resolution capability, so for side
Just it calculates, curve is divided into four parts, be fitted to four sections of straight lines.The step S2 specifically:
Step S21: human eye resolution grey scale curve is divided into four parts, is fitted to four sections of straight lines, respectively
Wherein, Y is human eye to gray scale resolution capability value, and i is gray scale value；
Step S22: according to default human eye to gray scale resolution capability value, being calculated by above formula when each gray scale value, will
Section greater than maximum gray scale value is set as high gray scale grade interval A, will be greater than minimal gray value and siding-to-siding block length and the section A
The identical section of length is set as low ash degree grade interval B；
In the present embodiment, the step S4 specifically: according to original image grey level histogram, adjustable factors K is introduced, so that
The pixel quantity of high gray scale grade interval A is original K times after amendment, and by the pixel quantity of high gray scale grade interval A reduction
Increase in the section B, obtains revised image grey level histogram；
The present embodiment, by taking Y=2 as an example, histogram modification formula such as (1) is shown,
Wherein, i is tonal gradation variable, and Histi represents former histogram, and Hist ' i is revised histogram.
In the present embodiment, the step S4 specifically:
Step S41: according to formula (2) and (3), count respectively amendment front and back histogram it is cumulative and
Wherein Hist1, sr, r respectively indicate the histogram, cumulative and area and maximum tonal gradation of original image, Hist2, G
(z), z add up after histogram, amendment after respectively indicating amendment and area and amendment after maximum tonal gradation；
Step S42: the inverse function of (3) formula is found out, according to zr=G-1(sr) the updated value zr of gray scale is obtained, it can be obtained
Grey level histogram after matching.Obtained gray scale updated value mapped drive waveforms are identical as the drive waveforms mapped originally, example
Pixel as being originally gray scale 16, is updated to gray scale 8 after handling through the invention, then 8 mapped of updated gray scale is driven
8 mapped drive waveforms of gray scale are the same before dynamic waveform and update.
The present invention increases by reducing the high high gray scale pixels A that consumes energy, and by high gray scale pixels equal number
Into the lower low gray scale pixels B of consuming energy, keep display panel total number-of-pixels constant, reach not only guarantee to show quality but also
Reduce the purpose of display power consumption.Assuming that the section A number of pixels is m, power consumption required for each pixel of the section A pixel, the section B picture
Prime number mesh is n, power consumption P required for each pixel in the section BB, transfer number of pixels is k.The power consumption of reduction are as follows:
PIt reduces=m*PA+n*PB-[(m-k)*PA+(n+k)*PB]。
As can be seen that traditional algorithm is whole partially dark from Fig. 4, Fig. 5, Fig. 6, it is also lost the detailed information of part low ash degree
As shown in red circle, and after using this paper modified hydrothermal process, reducing part high luminance pixels quantity such as the background in yellow circle
The cap in part high luminance pixels such as green circle is remained simultaneously, and the visual effect of image is substantially maintained.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, is all covered by the present invention.
Claims (5)
1. a kind of electrowetting low power image display methods based on human-eye visual characteristic, which comprises the following steps:
Step S1: acquisition original image grey level histogram；
Step S2: grey scale curve is differentiated according to human eye, constructs high gray scale grade interval A and low ash degree grade interval B；
Step S3: according to original image grey level histogram, introducing adjustable factors K so that after amendment high gray scale grade interval A pixel
Quantity is original K times, and the pixel quantity of high gray scale grade interval A reduction is increased in the section B, obtains revised figure
As grey level histogram；
Step S4: revised image grey level histogram and original image grey level histogram are matched, the gray scale after being matched
Histogram；
Step S5: according to the grey level histogram after matching, image is shown in electrowetting electronic paper display.
2. the electrowetting low power image display methods according to claim 1 based on human-eye visual characteristic, feature exist
In: the electrowetting electronic paper display pixel unit include the upper and lower base plate set gradually under upper, as water, ink, dredge
Water insulating layer, transparent electrode and substrate；The ink both ends are provided with pixel wall.
3. the electrowetting low power image display methods according to claim 1 based on human-eye visual characteristic, feature exist
In: the step S2 specifically:
Step S21: human eye resolution grey scale curve is divided into four parts, is fitted to four sections of straight lines, respectively
Wherein, Y is human eye to gray scale resolution capability value, and i is gray scale value；
Step S22: it according to default human eye to gray scale resolution capability value, is calculated by above formula when each gray scale value, be will be greater than
The section of maximum gray scale value is set as high gray scale grade interval A, will be greater than minimal gray value and siding-to-siding block length and A siding-to-siding block length
Identical section is set as low ash degree grade interval B.
4. the electrowetting low power image display methods according to claim 1 based on human-eye visual characteristic, feature exist
In: the step S4 specifically: according to original image grey level histogram, adjustable factors K is introduced, so that amendment Hou Gao tonal gradation area
Between A pixel quantity be original K times, and by the pixel quantity of high gray scale grade interval A reduction increase in the section B, obtain
Revised image grey level histogram；
If Y=2, histogram modification formula such as (1) is shown,
Wherein, i is tonal gradation variable, and Histi represents former histogram, and Hist ' i is revised histogram.
5. the electrowetting low power image display methods according to claim 1 based on human-eye visual characteristic, feature exist
In the step S4 specifically:
Step S41: according to formula (2) and (3), count respectively amendment front and back histogram it is cumulative and
Wherein Hist1, sr, r respectively indicate the histogram, cumulative and area and maximum tonal gradation of original image, Hist2, G (z),
Z add up after histogram, amendment after respectively indicating amendment and area and amendment after maximum tonal gradation；
Step S42: the inverse function of (3) formula is found out, according to zr=G-1(sr) the updated value zr of gray scale is obtained, after matching can be obtained
Grey level histogram.
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Application publication date: 20190924 |