CN101021999A - Zone division type display device and displaying method thereof - Google Patents

Zone division type display device and displaying method thereof Download PDF

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Publication number
CN101021999A
CN101021999A CN 200610008801 CN200610008801A CN101021999A CN 101021999 A CN101021999 A CN 101021999A CN 200610008801 CN200610008801 CN 200610008801 CN 200610008801 A CN200610008801 A CN 200610008801A CN 101021999 A CN101021999 A CN 101021999A
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display
picture
brightness value
backlight
signal
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CN 200610008801
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CN101021999B (en
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石明家
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Chi Mei Optoelectronics Corp
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Chi Mei Optoelectronics Corp
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Abstract

This invention discloses a region segmentation display and its display method including at least a backlight module, a segmenting unit, a signal process unit and a variable unit, in which, the backlight module has several backlight regions and each backlight region includes a brightness unit with a primary standard brightness value, the segmentation unit segments the input picture signals into several output picture signals, the variable unit changes the primary standard brightness value to the output brightness value based on the regional signals matched to the corresponding primary standard value to present a brightness and a color, and the output brightness value matched with the corresponding output picture signal maintains the brightness and color approaching to the original one.

Description

Zone division type display device and display packing thereof
Technical field
The present invention relates to concern a kind of display and display packing thereof, particularly relevant a kind of Zone division type display device and the display packing thereof of lying in.
Background technology
The module backlight of traditional monitor has a fixing briliancy, and therefore when showing the picture of different brightness, the briliancy of module backlight can't change, and the little picture of brightness still uses same briliancy to show, causes waste of electric energy.In the prior art, it is pattern (In Plane Switching Mode) LCD that Philip (Philips) company uses adaptation dynamic image control (Adaptive Dynamic Image Control) to cooperate XY switch, adjust the briliancy of module integral body backlight according to the color range distribution dynamic of picture, that is picture brightness is when high, module backlight is tuned as bigger brightness value, when picture brightness hanged down, module backlight was tuned as less brightness value.Yet generally speaking, the wide range that the color range in the same picture distributes, even if therefore used the control of adaptation dynamic image, the part that color range is different in the picture still can't be with the module displays backlight of different briliancy.Traditional module backlight is not had a regionality, can't really reach the purpose of the briliancy of using module backlight efficiently.
Summary of the invention
Purpose of the present invention is providing a kind of Zone division type display device and display packing thereof exactly, but region-type is cut apart module backlight and input picture signal, so as to using the briliancy of module backlight efficiently, makes it to reach the effect of more power saving.
According to purpose of the present invention, a kind of Zone division type display device is proposed, show a picture in order to region-type.Zone division type display device comprises a module backlight, a cutting unit, a signal processing unit and a modulation unit at least.Module backlight has several backlight area.But each backlight area comprises the briliancy unit of a modulation.The briliancy unit has a benchmark brightness value respectively.Cutting unit is divided into several picture area signals in order to import the picture signal with one, and the picture area signal corresponds respectively to backlight area.Signal processing unit is in order to receiving the picture area signal, and the picture area signal is converted to several output picture signals.The modulation unit is the output brightness value according to picture area signal changing benchmark brightness value.Each benchmark brightness value cooperates with corresponding picture area signal and presents brightness and a colourity, and each output brightness value is kept to present with corresponding output picture signal cooperation and approached original brightness and colourity.
According to purpose of the present invention, other proposes a kind of display packing of region-type Splittable display, in order to region-type display frame.At first, provide the module backlight that is arranged at display.Module backlight has several backlight area, but each backlight area comprises the briliancy unit of a modulation, and each briliancy unit has a benchmark brightness value.Then, will import the picture signal and be divided into several picture area signals.The picture area signal corresponds respectively to backlight area.And each benchmark brightness value cooperates with corresponding picture area signal and presents brightness and a colourity.Moreover, the picture area signal is converted to several output picture signals.Afterwards, according to picture area signal changing briliancy unit, make the benchmark brightness value be tuned as the output brightness value.Each output brightness value is kept to present with corresponding output picture signal cooperation and is approached original brightness and colourity.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below especially exemplified by a preferred embodiment, and cooperate appended graphicly, elaborate.Wherein:
Figure 1A, Figure 1B and Fig. 1 C are the synoptic diagram according to Region Segmentation of the present invention.
Fig. 2 is the calcspar according to the Zone division type display device of a preferred embodiment of the present invention.
Fig. 3 is the process flow diagram according to the display packing of the Zone division type display device of a preferred embodiment of the present invention.
Embodiment
The present invention utilizes the mode of Region Segmentation to cut apart module backlight, makes display be able to the briliancy of region-type modulation module backlight, cooperates conversion picture signal to keep near original brightness of picture and colourity again.The purpose of Region Segmentation is to distinguish the prospect and the background of picture, that is distinguishes the different zone of brightness.The area in each piece zone does not need identical or symmetrical.Number of regions is many more, and it is good more that then region-type is controlled the effect of briliancy of module backlight, and more can power saving, but cost also improves relatively.
Please refer to Figure 1A, Figure 1B and Fig. 1 C, this is the synoptic diagram according to Region Segmentation of the present invention.Please refer to Figure 1A, module backlight is divided into four backlight area fifty-fifty.Among Figure 1B, module backlight is divided into the backlight area and four backlight area around being positioned at that are positioned at central authorities.The partitioning scheme of module backlight also can be divided into first backlight area, 131 to the 9th backlight area 139 that nine areas equate according to Fig. 1 C.
See also Fig. 2, this is the calcspar that the region-type of a preferred embodiment of the present invention is cut apart display.Zone division type display device 200 of the present invention is in order to region-type display frame.The Zone division type display device 200 of present embodiment comprises a module 202 backlight, a cutting unit 203, a signal processing unit 204 and a modulation unit 205 at least.The Zone division type display device 200 of present embodiment more can preferably comprise a driver element 207, a display panel 208 and a low-pass filter 209.
Display 200 for example has a character used in proper names and in rendering some foreign names agate curve values γ (Gamma Curve Value) and a character used in proper names and in rendering some foreign names Maqu line (Gamma Curve), in order to the B=Gamma that concerns of the color range value G of expression briliancy B of display and display γ(G), and character used in proper names and in rendering some foreign names agate value γ preferably be 2.2.Perhaps also can use comparison list to represent the relation of briliancy B and color range value G, i.e. B=LUT (G).
Module 202 backlight can be a cold cloudy fluorescent tube (Cold Cathode Fluorescent Lamp, CCFL) module backlight, a light-emittingdiode (Light Emitting Diode, LED) module backlight of module backlight or other kinds.Present embodiment is that example is done explanation with the cold cloudy fluorescent tube module backlight of white light source.Right the present invention so long as the module backlight of light source can be provided, all belongs to the scope of institute of the present invention desire protection not as limit.
Module 202 backlight has first backlight area 131, second backlight area to the N backlight area, N positive integer.Each backlight area has a briliancy unit, for example is that first backlight area 131 has briliancy unit 241.Each briliancy unit has a benchmark brightness value B respectively 1
Cutting unit 203 will be in order to will import picture signal G 0Be divided into several picture area signals G 1 Signal processing unit 204 is connected with cutting unit 203, in order to receive picture area signal G 1, and with picture area signal G 1Be converted to several output picture signals G 2Modulation unit 205 is connected with signal processing unit 204, in order to according to picture area signal G 1Modulation benchmark brightness value B 1Be output brightness value B 2Driver element 207 is connected with signal processing unit 204, in order to receive the output picture signal G that signal processing unit 204 transmits 2, and drive display panel 208 according to this.
Low-pass filter 209 is connected with modulation unit 205, adjusts brightness value B in order to output 3, make the briliancy unit be tuned as respectively and adjust brightness value B 3But low-pass filter 209 appropriate reactions go out each interregional back light resulting true briliancy in back that interacts, and zone and interregional luminance variations gap backlight are dwindled, and lower the discontinuous problem of picture.Right low-pass filter 209 is a kind of selectivity (optional) technological means under the spirit of the present invention.Zone division type display device 200 of the present invention also can not comprise low-pass filter 209, and directly adjusts briliancy unit 241 with modulation unit 205.
Please be simultaneously with reference to Fig. 2 Fig. 3, Fig. 3 is a process flow diagram of cutting apart the display packing of display according to the region-type of a preferred embodiment of the present invention.
At first, shown in step 302, provide module 202 backlight.Module 202 backlight has several backlight area, is arranged in the display 200.But each backlight area comprises the briliancy unit of a modulation.The briliancy unit has a benchmark brightness value B respectively 1
Then, shown in step 304, cutting unit 203 will be imported picture signal G 0Be divided into several picture area signals G 1, picture area signal G 1Several backlight area of the corresponding module 202 backlight of difference.Each picture area signal G 1With corresponding benchmark brightness value B 1Cooperate and present brightness and a colourity.
Then, in the step 306, signal processing unit 204 is with picture area signal G 1Be converted to several output picture signals G 2For example be to find out each picture area signal G earlier 1Maximum color range value M, maximum color range value M is for example between 0 and 255.Again according to each picture area signal G 1Maximum color range value M, with each picture area signal G 1Mode with linear amplification is converted to output picture signal G 2, for example be output picture signal G 2 = G 1 × 255 M .
Moreover in step 308, modulation unit 205 is according to picture area signal G 1 Modulation briliancy unit 241 makes the benchmark brightness value B of briliancy unit 241 1Be tuned as output brightness value B 2Each output brightness value B 2With corresponding output picture signal G 2Cooperate to keep and present brightness and the colourity that approaches.For example be according to each picture area signal G 1Maximum color range value M modulation briliancy unit, make benchmark brightness value B 1Be tuned as output brightness value B 2For example be output brightness value B 2=100% * Gamma γ(M).
Modulating method in the above-mentioned step 308 more can comprise: install a low-pass filter 209 in display 200.Then, accept output brightness value B with low-pass filter 209 2And linear superposition output brightness value B 2To obtain adjusting brightness value B 3Moreover, briliancy unit 241 is tuned as adjustment brightness value B 3
In order to describe the function mode of low-pass filter 209 in detail, be example with the partitioning scheme of 1C figure, that is module backlight 202 is divided into first backlight area, 131 to the 9th backlight area 139.
Low-pass filter 209 is accepted the output brightness value B of backlight area 202 2, comprise the output brightness value of first backlight area, 131 to the 9th backlight area 139, with B 21To B 29Expression.With the 5th backlight area 135 is example, and low-pass filter 209 nine output brightness values therewith revolves long-pending (convolution) to obtain the adjustment brightness value B of the 5th backlight area 135 35The non-certain value of each parameter of low-pass filter 209, the adjustment brightness value B of the 5th backlight area 135 35Can preferably be:
B 35 = B 21 B 22 B 23 B 24 B 25 B 26 B 27 B 28 B 29 * F 1 F 2 F 3 F 4 E 5 F 6 F 7 F 8 F 9
＝B 21×F 1+B 22×F 2+B 23×F 3+B 24×F 4+B 25×F 5+B 26×F 6+B 27×F 7+B 28×F 8+B 29×F 9
Each parameter of low-pass filter 209 can be done suitable allotment according to each zone and the degree of influencing each other of interregional back light.For example, please refer to 1C figure, second backlight area 132, the 4th backlight area 134, the 6th backlight area 136 and the 8th backlight area 138 are adjacent with the 5th backlight area 135, so influencing each other of a little zones is more serious.The parameter that preferable example can be set low-pass filter is F 1=0, F 2=0.125, F 3=0, F 4=0.125, F 5=0.5, F 6=0.125, F 7=0, F 8=0.125, F 9=0, that is B 35=0.125B 22+ 0.125B 24+ 0.5B 25+ 0.125B 26+ 0.125B 28
In addition, Zone division type display device 200 of the present invention more can comprise several isolation structures, is installed between each backlight area, interacts in order to a light of avoiding each backlight area.
Though above-mentioned is that example is done explanation with cold cloudy fluorescent tube module backlight, right Zone division type display device of the present invention also can be used the light-emittingdiode backlight module of mass-tone for red (R), green (G) and blue (B).That is each backlight area has several briliancy unit corresponding to different mass-tones, and as conversion picture area signal G 1And benchmark brightness value B 1The time, three mass-tones are separately adjusted, to obtain the output picture signal G of different mass-tones 2With output brightness value B 2In addition, it is mass-tone that the present invention does not also limit with red, green, blueness, also can have more mass-tone according to the characteristic of display panel.
The disclosed Zone division type display device linear amplification of the above embodiment of the present invention the color range signal of picture area, therefore when picture brightness hour, original maximum color range value is less than 255, display can be accepted the bigger color range signal of the picture degree of depth, and maximum color range value correspondence is amplified to 255, make display can show more rich color.Because module backlight dimmed briliancy accordingly, can reach less electricity consumption and reduce the temperature of module backlight, and reduce the situation of the dark attitude light leak of liquid crystal.In addition,, the contrast of picture be can improve, and better visual angle aberration and visual angle contrast obtained because of reducing the dark attitude light leak of liquid crystal.In addition when display need show a certain pure color, the briliancy of other colors of module backlight can be as small as and concerns the state of falling fully, therefore the interference that can lower other pure color colors, what make shows preferable pure color, make the displayable colour gamut of display increase, improved the color saturation (ColorGamut) of display.Moreover, on dynamic menu, owing to adjust the reacting dose that the briliancy of module backlight can reduce liquid crystal, that is utilize adjustment backlight faster, shared the luminance variations of part, and then improved because the phenomenon of the liquid crystal reaction slow animation that causes (Motion Picture) image quality difference.
In sum; though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention should be as the criterion with the scope that claims were defined of the application's patent.

Claims (14)

1. a Zone division type display device shows a picture in order to region-type, it is characterized in that, this Zone division type display device comprises at least:
One module backlight have most backlight area, but each backlight area comprises the briliancy unit of a modulation, and each briliancy unit has a benchmark brightness value B respectively 1
One cutting unit is in order to import picture signal G with one 0Be divided into most picture area signal G 1, each picture area signal G 1Correspond respectively to a backlight area;
One signal processing unit is in order to receive each picture area signal G 1, and with each picture area signal G 1Be converted to most output picture signal G 2And
One modulation unit is according to each picture area signal G 1Each benchmark brightness value B of modulation 1Be most output brightness value B 2
Wherein, each benchmark brightness value B 1With corresponding this picture area signal G 1Cooperate to present brightness and a colourity, and each output brightness value B 2With corresponding this output picture signal G 2Cooperate to keep to present and approach corresponding this brightness and this colourity.
2. display as claimed in claim 1 is characterized in that, this display has a character used in proper names and in rendering some foreign names agate curve values γ and a character used in proper names and in rendering some foreign names Maqu line, in order to the briliancy B that represents this display and the relational expression B=Gamma of color stage value G γ(G).
3. display as claimed in claim 2 is characterized in that, this signal processing unit is according to each those picture area signals G 1A maximum color range value M, in the mode of linear amplification, with each picture area signal G 1Be converted to respectively and respectively export picture signal G 2, and should maximum color range value M between 0 and 255.
4. display as claimed in claim 3 is characterized in that, this modulation unit is according to each picture area signal G 1This maximum color range value M, with this benchmark brightness value B of correspondence 1Be tuned as corresponding this output brightness value B 2
5. display as claimed in claim 4 is characterized in that each exports brightness value B 2=100% * Gamma γ(M), and respectively export the picture signal G 2 = G 1 × 255 M .
6. display as claimed in claim 2 is characterized in that this display more comprises a low-pass filter, adjusts brightness value B in order to export most 3, make each briliancy unit be tuned as one respectively and adjust brightness value B 3
7. display as claimed in claim 6 is characterized in that, each adjusts brightness value B 3Linear superposition one output brightness value B 2
8. display as claimed in claim 1 is characterized in that, this display more comprises most isolation structures, is installed between each backlight area, interacts in order to a light of avoiding each backlight area.
9. display as claimed in claim 1 is characterized in that, this module one cold cloudy fluorescent tube module backlight backlight or light-emittingdiode module backlight.
10. display as claimed in claim 2 is characterized in that, this character used in proper names and in rendering some foreign names agate value γ is 2.2.
11, a kind of display packing of region-type Splittable display is in order to region-type display frame; It is characterized in that, may further comprise the steps:
A, provide the module backlight that is arranged at display;
B, will import the picture signal and be divided into several picture area signals;
C, the picture area signal is converted to several output picture signals;
D, according to picture area signal changing briliancy unit, make the benchmark brightness value be tuned as the output brightness value.
12, the display packing of a kind of region-type Splittable display according to claim 11, it is characterized in that, module backlight described in a step has several backlight area, but each backlight area comprises the briliancy unit of a modulation, and each briliancy unit has a benchmark brightness value.
13, the display packing of a kind of region-type Splittable display according to claim 11 is characterized in that, the picture area signal described in the b step corresponds respectively to backlight area.And each benchmark brightness value cooperates with corresponding picture area signal and presents brightness and a colourity.
14, the display packing of a kind of region-type Splittable display according to claim 11 is characterized in that, each output brightness value is kept to present with corresponding output picture signal cooperation and approached original brightness and colourity in the d step.
CN2006100088018A 2006-02-15 2006-02-15 Zone division type display device and displaying method thereof Expired - Fee Related CN101021999B (en)

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CN103778899A (en) * 2014-02-28 2014-05-07 帝豪电子（扬州）有限公司 Dynamic dimming method of liquid crystal display LED backlight
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