CN102237068A - Display device - Google Patents
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- CN102237068A CN102237068A CN2010101669310A CN201010166931A CN102237068A CN 102237068 A CN102237068 A CN 102237068A CN 2010101669310 A CN2010101669310 A CN 2010101669310A CN 201010166931 A CN201010166931 A CN 201010166931A CN 102237068 A CN102237068 A CN 102237068A
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Abstract
The invention relates to a display device. The display device comprises an image statistical module, a parameter calculation module and an image adjusting module, wherein the image statistical module is used for receiving a plurality of image data and calculating the pixel number corresponding to different kinds of luminance in the image data so as to acquire luminance distribution parameters; the parameter calculation module is used for searching set luminance of which the emergence probability is in a first specific proportion according to the luminance distribution parameters, searching first and second adjusted luminance of which the emergence probabilities are is in a second specific proportion and a third specific proportion according to the luminance distribution parameters and calculating a piece-wise linear luminance corresponding relation according to the set luminance, the first adjusted luminance and the second adjusted luminance; when input image data are equal to the set luminance, output image data are equal to input image data; and the image adjusting module is used for adjusting the image data according to the luminance corresponding relation so as to generate a plurality of display image data. The display device can simply and effectively achieve an effect of dynamically adjusting display image contrasts.
Description
Technical field
The present invention relates to a kind of display device, and be particularly related to a kind of device of adjusting at the display image contrast of display device.
Background technology
In electronics technology today of universalness day by day, electronic product has become indispensable instrument in people's life.And for the user is provided better using character, dynamical display device be now electronic product indispensable necessity equipment.
For promoting the demonstration usefulness of display device, the contrast adjustment of image is a very important function.And in the technique known field, under the situation of ignoring the image displaying contents, the image of orthoscopic that only proposes the brightness corresponding relation of single input image data and output image data is adjusted curve, with the foundation of adjusting as image comparison.It is quite easy certainly on the implementation that the image of this orthoscopic is adjusted curve, but because the brightness of image is dynamically to change.This known orthoscopic image is adjusted the adjustment technology of curve, and is not suitable for the display image of all brightness.Also therefore, on lifting demonstration usefulness, have a greatly reduced quality.
Corresponding to this, known technology (for example United States Patent (USP) case number 6,870,955) proposes nonlinear image that a kind of utilization goes out as shown in Figure 1 in addition and adjusts curve 110 and carry out the contrast adjustment of image.This image is adjusted curve 110 owing to be a quafric curve, and is therefore comparatively complicated on calculating on the implementation.Though the image adjustment curve than orthoscopic has preferable usefulness, and is higher on the hardware cost of implementing, and can't take into account the dual consideration of cost and usefulness.
Summary of the invention
The invention provides a kind of display device, can dynamically adjust image comparison according to view data.
The present invention proposes a kind of display device, comprises image statistics module, parameter calculating module and image adjustment module.The image statistics module receives a plurality of view data, and the pairing pixel quantity of different brightness in the computed image data, so as to obtaining the Luminance Distribution parameter.Parameter calculating module couples the image statistics module, the setting brightness that probability is first special ratios occurs in order to receive this Luminance Distribution parameter and to search, and search according to the Luminance Distribution parameter that probability to occur be that first of second special ratios and the 3rd special ratios adjusted brightness and second and adjusted brightness according to the Luminance Distribution parameter.Parameter calculating module goes out the input image data of fragment linearity (piece-wise linear) and the brightness corresponding relation of output image data according to setting brightness, first and second adjustment brightness calculation.Wherein, when input image data equaled to set brightness, output image data equaled input image data.Image adjustment module couples parameter calculating module, receives brightness corresponding relation and view data.Image adjustment module is adjusted view data to produce a plurality of display image datas according to the brightness corresponding relation.
In one embodiment of this invention, the first above-mentioned special ratios is greater than second special ratios, and the 3rd special ratios is greater than first special ratios.
In one embodiment of this invention, the first above-mentioned special ratios is greater than the 3rd special ratios, and second special ratios is greater than first special ratios.
In one embodiment of this invention, when the brightness of above-mentioned input image data equals the first adjustment brightness, output image data is less than input image data, and the brightness of input image data equals second when adjusting brightness, and output image data is greater than input image data.
In one embodiment of this invention, when the brightness of above-mentioned input image data equals the first adjustment brightness, output image data is greater than input image data, and the brightness of input image data equals second when adjusting brightness, and output image data is less than input image data.
In one embodiment of this invention, above-mentioned parameter calculating module more comprise according to Luminance Distribution parameter and at least one the 4th special ratios search occur probability be the 4th special ratios at least one the 3rd adjust brightness.
In one embodiment of this invention, when the brightness of above-mentioned input image data equaled the 3rd adjustment brightness, output image data was greater than or less than this input image data.
In one embodiment of this invention, above-mentioned image adjustment module utilizes an interpolative operation method to adjust view data to produce display image data according to the brightness corresponding relation.
In one embodiment of this invention, above-mentioned brightness corresponding relation is look-up table (look-up table).
Based on above-mentioned, the present invention utilizes a plurality of view data of dynamic reception to obtain the Luminance Distribution parameter, and according in the Luminance Distribution parameter, brightness probability occurs and adjusts the brightness corresponding relation that brightness produces the fragment linearity of input image data and output image data for the setting brightness of first and second and three special ratios and first and second.Adjust the view data of instant reception again by the brightness corresponding relation, the display image data that is used for showing with generation.Thus, can be simply and effectively realize dynamically adjusting the effect of display image contrast.And the adjustment of display image contrast is to carry out according to the image brightness distribution that shows at present, makes the adjustment of contrast have more effect.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and conjunction with figs. is described in detail below.
Description of drawings
Fig. 1 illustrates nonlinear image and adjusts curve 110.
Fig. 2 illustrates the synoptic diagram of the display device 200 of one embodiment of the invention.
The bar chart of the Luminance Distribution parameter 250 shown in Fig. 2 A.
Fig. 2 B illustrates the brightness corresponding relation 280 that the Luminance Distribution parameter according to Fig. 2 A is obtained.
Fig. 2 C illustrates another brightness corresponding relation 290 that the Luminance Distribution parameter according to Fig. 2 B is obtained.
The display device that Fig. 3 illustrates the embodiment of the invention compares the action flow chart of adjustment.
Description of reference numerals in the above-mentioned accompanying drawing is as follows:
110. image is adjusted curve
200: display device
210: the image statistics module
220: parameter calculating module
230: image adjustment module
250: the Luminance Distribution parameter
280,290: the brightness corresponding relation
281: diagonal line
P1～P5: set point
A～E: brightness
HIS: Luminance Distribution parameter
DIN: view data
DOUT: display image data
S310～S340: contrast set-up procedure
Embodiment
Please refer to Fig. 2, Fig. 2 illustrates the synoptic diagram of the display device 200 of one embodiment of the invention.Display device 200 comprises image statistics module 210, parameter calculating module 220 and image adjustment module 230.Wherein, image statistics module 210 receives a plurality of view data DIN, and the pairing pixel quantity of different brightness among the computed image data DIN, so as to obtaining Luminance Distribution Parameter H IS.A bit concrete, image statistics module 210 is by calculating the corresponding sum of all pixels that shows each different brightness among a plurality of view data DIN.Please refer to the bar chart (histogram) of the Luminance Distribution parameter 250 shown in Fig. 2 A.Wherein, the transverse axis of Luminance Distribution parameter 250 bar charts is brightness, and the longitudinal axis then is the sum of all pixels of each brightness correspondence.With brightness A1 and A2 is example, and in view data DIN, display brightness is that the pixel of A1 has 7.And in view data DIN, display brightness is that the pixel of A2 then has 10.
Note that view data DIN is data that dynamically change along with display variation, that is to say that Luminance Distribution parameter 250 also is dynamic change.And the view data DIN that is used for setting up Luminance Distribution parameter 250 can be the data of a frame or a plurality of frames, in view data quantitatively, does not have certain restriction.
Please again with reference to Fig. 2, parameter calculating module 220 couples image statistics module 210 again.Parameter calculating module 220 receives the Luminance Distribution Parameter H IS that image statistics modules 210 are produced, and searches according to Luminance Distribution Parameter H IS and first of setting brightness that probability is first special ratios, second special ratios to occur and adjust second of brightness and the 3rd special ratios and adjust brightness.At this.So-called first special ratios, second special ratios and the 3rd special ratios do not limit its ratio value, and the deviser can set up on their own on demand.Relation between first and second and three special ratios then be first special ratios between between second and three special ratios, second special ratios then can also can be less than the 3rd special ratios greater than (being not equal to) the 3rd special ratios.Give an example, be used for searching first special ratios of setting brightness and can be set to 50%, the second and three special ratios and then can be set to 25% and 75% respectively.
Again please again with reference to Fig. 2 A, according in the above-mentioned example, first and second and three special ratios are set to respectively under 50%, 25% and 75% the situation, parameter calculating module 220 can find out according to the bar chart of Luminance Distribution parameter 250 that to set brightness be brightness C, and first adjusts brightness and second adjusts brightness and then be respectively brightness A and brightness B.
After finding out setting brightness, the first adjustment brightness and the second adjustment brightness, parameter calculating module 220 obtains the input image data of fragment linearity and the brightness corresponding relation of output image data according to setting brightness, first and second adjustment brightness.Please refer to Fig. 2 B at this, Fig. 2 B illustrates the brightness corresponding relation 280 that the Luminance Distribution parameter according to Fig. 2 A is obtained.Wherein, in brightness corresponding relation 280, when input image data equaled to set brightness (brightness C), the brightness of output image data and input image data was equal to brightness C.That is to say that the set point P1 that orients according to setting brightness C drops on 281 of diagonal line.In addition, in brightness corresponding relation 280, when input image data equaled the first adjustment brightness (brightness A), the brightness of corresponding output image data then was set to less than brightness A, that is to say that the set point P2 that the foundation first adjustment brightness A orients drops on the below of diagonal line 281.And when input image data equaled the second adjustment brightness (brightness B), the brightness of corresponding output image data then was set to greater than brightness B, that is to say, the set point P3 that the foundation first adjustment brightness B orients drops on the top of diagonal line 281.
In view of the above, 220 needs of parameter calculating module connect the terminal point T of initial point O, set point P2, set point P1, set point P3 and diagonal line 281 in regular turn, promptly can obtain brightness corresponding relation 280.
This note that according to first adjust set point P2 that brightness A oriented also can be positioned in diagonal line 281 above, and adjust the below that set point P3 that brightness B oriented also can be positioned in diagonal line 281 according to second.Set point P2, P3 wherein do not limit the position of its setting, can change according to user or deviser's demand.
In addition, owing to be dynamically to change as the Luminance Distribution parameter of the foundation foundation of brightness corresponding relation 280, so brightness corresponding relation 280 also is dynamically to change.
It should be noted that under the mode of digital Design the brightness corresponding relation can utilize the mode of look-up table to implement.In simple terms, be example with the brightness of 8 bit resolutions, the data of the brightness of the output image that calculates in regular turn by brightness corresponding relation 280 according to the brightness 0～255 of input picture are recorded in the look-up table exactly.
In addition, please refer to Fig. 2 C, Fig. 2 C illustrates another brightness corresponding relation 290 that the Luminance Distribution parameter according to Fig. 2 B is obtained.Wherein, in the brightness corresponding relation 290,, in the Luminance Distribution parameter, find out different adjustment brightness D and E more according to different special ratios.And make brightness corresponding relation 290 increase a plurality of set point P4, P5.Thus, the turning point of brightness corresponding relation 290 will can provide trickleer image comparison adjustment more more than brightness corresponding relation 280.
That is to say that the set point on the brightness corresponding relation 290 in the embodiment of the invention does not limit its quantity, wherein the set point quantity as turning point can increase and decrease according to deviser or user's demand and adjust.
Please again with reference to Fig. 2, image adjustment module 230 couples parameter calculating module 220, in order to receive brightness corresponding relation and view data DIN.Image adjustment module 230 is adjusted view data DIN to produce a plurality of display image data DOUT that are used for showing according to the brightness corresponding relation.Furthermore bright, when the brightness corresponding relation is when implementing with look-up table, it is that the input picture brightness of finding out corresponding output image of tabling look-up can obtain display image data DOUT that image adjustment module 230 only needs according to the view data DIN that is received.In addition, when the brightness corresponding relation is not to be when implementing with look-up table, because the brightness corresponding relation is the curve of a fragment linearity, therefore, image adjustment module 230 can receive the information (input of set point and the brightness of output image) of all set points on the brightness corresponding relation, and carry out interpolative operation according to the information of two adjacent set points of each view data DIN, just can obtain each display image data DOUT of each view data DIN correspondence.
Above-mentioned interpolative operation method of carrying out interpolative operation is a technology well known to those of ordinary skill in the art, seldom explains for this reason at this.
Below please refer to Fig. 3, the display device that Fig. 3 illustrates the embodiment of the invention compares the action flow chart of adjustment.At first, receive view data (S310), then, the pairing pixel quantity of different brightness in the computed image data is so as to obtaining Luminance Distribution parameter (S320).After obtaining the Luminance Distribution parameter, search according to the Luminance Distribution parameter and the setting brightness that probability is first special ratios to occur, and search according to the Luminance Distribution parameter that probability to occur be that first of second special ratios and the 3rd special ratios adjusted brightness and second and adjusted brightness, calculate the input image data of fragment linearity and the brightness corresponding relation (S330) of output image data again.At last, adjust view data to produce a plurality of display image datas (S340) according to the brightness corresponding relation.
In sum, the present invention utilizes according to a plurality of view data of dynamic statistics, with the Luminance Distribution parameter that obtains.And search by the Luminance Distribution parameter different proportion the appearance probability setting brightness with adjust brightness, and set brightness and adjust brightness calculation and go out the input image data of fragment linearity and the brightness corresponding relation of output image data according to these.Thus, the image data illumination of input just can be adjusted and be obtained the actual display image data that is used for showing according to the brightness corresponding relation of dynamic adjustment.In the display frame of different brightness, can reach the effect that good contrast is adjusted.And because the fragment linear characteristic of brightness corresponding relation, also the hardware complexity of effective simplification display device effectively reduces circuit cost.
Though the present invention discloses as above with embodiment; yet it is not in order to limit the present invention; technical field those of ordinary skill under any; without departing from the spirit and scope of the present invention; when doing a little change and retouching, so protection scope of the present invention is as the criterion when looking appended the scope that claim defined.
Claims (10)
1. display device comprises:
One image statistics module receives a plurality of view data, and calculates the pairing pixel quantity of different brightness in described a plurality of view data, so as to obtaining a Luminance Distribution parameter;
One parameter calculating module, couple this image statistics module, receive this Luminance Distribution parameter, search according to this Luminance Distribution parameter that probability to occur be that one of one first special ratios is set brightness, and search according to this Luminance Distribution parameter that probability to occur be that one first of one second special ratios and one the 3rd special ratios adjusted brightness and one second and adjusted brightness, and according to this setting brightness, this first and second adjustment brightness calculation goes out an input image data of fragment linearity and a brightness corresponding relation of an output image data, wherein, when this input image data equaled this setting brightness, this output image data equaled this input image data; And
One image adjustment module couples this parameter calculating module, receives this brightness corresponding relation and described a plurality of view data, adjusts described a plurality of view data to produce a plurality of display image datas according to this brightness corresponding relation.
2. display device as claimed in claim 1, wherein this first special ratios is greater than this second special ratios, and the 3rd special ratios is greater than this first special ratios.
3. display device as claimed in claim 1, wherein this first special ratios is greater than the 3rd special ratios, and this second special ratios is greater than this first special ratios.
4. display device as claimed in claim 1, when wherein the brightness of this input image data equals this first adjustment brightness, this output image data is less than this input image data, and when the brightness of this input image data equaled this second adjustment brightness, this output image data was greater than this input image data.
5. display device as claimed in claim 1, when wherein the brightness of this input image data equals this first adjustment brightness, this output image data is greater than this input image data, and when the brightness of this input image data equaled this second adjustment brightness, this output image data was less than this input image data.
6. display device as claimed in claim 1, wherein this parameter calculating module more comprises searching according to this Luminance Distribution parameter and at least one the 4th special ratios and probability occurs and adjust brightness at least one the 3rd of this at least one the 4th special ratios.
7. display device as claimed in claim 6, wherein this parameter calculating module more according to should be at least one the 3rd adjustment brightness to adjust this brightness corresponding relation.
8. display device as claimed in claim 6, wherein the brightness of this input image data equals this at least one the 3rd when adjusting brightness, and this output image data is greater than or less than this input image data.
9. display device as claimed in claim 1, wherein this image adjustment module utilizes an interpolative operation method to adjust described a plurality of view data to produce described a plurality of display image data according to this brightness corresponding relation.
10. display device as claimed in claim 1, wherein this brightness corresponding relation is a look-up table.
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| CN2010101669310A CN102237068A (en) | 2010-04-23 | 2010-04-23 | Display device |
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| CN2010101669310A CN102237068A (en) | 2010-04-23 | 2010-04-23 | Display device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1649420A (en) * | 2004-01-28 | 2005-08-03 | 日本胜利株式会社 | Video signal processor and method of processing video signal |
| CN1744687A (en) * | 2005-09-14 | 2006-03-08 | 上海广电（集团）有限公司中央研究院 | Method for dynamically increasing video image effect of vision |
| CN101098394A (en) * | 2006-06-28 | 2008-01-02 | 奇美电子股份有限公司 | Image adjusting method and apparatus |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1649420A (en) * | 2004-01-28 | 2005-08-03 | 日本胜利株式会社 | Video signal processor and method of processing video signal |
| CN1744687A (en) * | 2005-09-14 | 2006-03-08 | 上海广电（集团）有限公司中央研究院 | Method for dynamically increasing video image effect of vision |
| CN101098394A (en) * | 2006-06-28 | 2008-01-02 | 奇美电子股份有限公司 | Image adjusting method and apparatus |
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Application publication date: 20111109 |