CN101937634B - Picture regulating method and device of liquid crystal panel - Google Patents
Picture regulating method and device of liquid crystal panel Download PDFInfo
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Abstract
The embodiment of the invention discloses picture regulating method and device of a liquid crystal panel, relating to the technical field of liquid crystal display and aims to increase picture display effect of the liquid crystal panel. The picture regulating method comprises the following steps of: selecting a test picture; regulating a blink value of the test picture to obtain a critical public reference voltage; obtaining a gray-scale picture; and regulating a gamma curve of the gray-scale picture to obtain a critical source electrode driver voltage. The invention can increase the picture display effect of the liquid crystal panel.
Description
Technical field
The present invention relates to technical field of liquid crystal display, relate in particular to a kind of picture adjusting method and device of liquid crystal panel.
Background technology
The increasing favor that receives numerous consumers of the dull and stereotyped LCD TV of large scale, and the consumer is also increasingly high to the requirement of display image and image quality.
Because the inherent characteristic of liquid crystal molecule; LCD needs the continuous conversion of positive-negative polarity in display frame; Therefore this just causes the positive and negative gray scale voltage absolute value difference under the different pictures bigger easily, thereby the float degree that makes human eye under different pictures, feel is also different.In addition, because there is certain distortion in the LCD self characteristics between input voltage and output image.In view of above 2 points, the adjusting of LCD being carried out float and degree of distortion is necessary.
But the inventor finds in realizing process of the present invention, and it is not fine utilizing the picture display effect of the liquid crystal panel that film flicker of the prior art or gamma curve method of adjustment obtain.
Summary of the invention
The embodiment of the invention provides a kind of picture adjusting method and device of liquid crystal panel, to improve the picture display effect of liquid crystal panel.
The embodiment of the invention adopts following technical scheme:
A kind of picture adjusting method of liquid crystal panel comprises:
Select test pictures;
Obtain and adjust the flicker value of said test pictures, make that the flicker value satisfied first of said test pictures is pre-conditioned, and obtain the corresponding critical common reference voltage of adjusted flicker value;
Obtain the GTG picture;
Gamma curve to said GTG picture is adjusted, and makes that the gamma curve satisfied second of said GTG picture is pre-conditioned, and obtains the corresponding critical source electrode driver voltage of adjusted gamma curve.
A kind of picture regulator of liquid crystal panel comprises:
The picture and selecting unit is used to select test pictures;
The flicker value adjustment unit is used to obtain and adjust the flicker value of said test pictures, and it is first pre-conditioned to make that the flicker value of said test pictures satisfies, and obtains the corresponding critical common reference voltage of adjusted flicker value;
The picture selected cell is used to obtain the GTG picture;
Gamma curve adjustment unit is used for the gamma curve of said GTG picture is adjusted, and makes that the gamma curve satisfied second of said GTG picture is pre-conditioned, and obtains the corresponding critical source electrode driver voltage of adjusted gamma curve.
The picture adjusting method of the liquid crystal panel that the embodiment of the invention provides and device combine adjustment of the flicker value of liquid crystal panel and the adjustment of gamma curve, therefore, can improve the picture display effect of liquid crystal panel.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention; The accompanying drawing of required use is done an introduction simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the process flow diagram of the picture adjusting method of the embodiment of the invention one liquid crystal panel;
Fig. 2 is the process flow diagram of the picture adjusting method of the embodiment of the invention two liquid crystal panels;
Fig. 3 is the synoptic diagram of the applied system of method of the embodiment of the invention three;
Fig. 4 is that film flicker is regulated the picture synoptic diagram in the method for the embodiment of the invention three;
Fig. 5 is the synoptic diagram of the picture regulator of embodiment of the invention liquid crystal panel;
Fig. 6 is the structural drawing of the picture regulator of embodiment of the invention liquid crystal panel.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Because the driving under long-time direct current mode, so liquid crystal panel can produce the liquid crystal molecule catabiosis, thereby had a strong impact on the life-span of liquid crystal panel.So liquid crystal panel generally adopts the AC driving mode to drive.Moreover liquid crystal layer is equal to an electric capacity on circuit equivalent, even under same GTG, its signal also can be because of the influence of positive and negative half period voltage difference, thereby the brightness of picture is inconsistent before and after causing.In addition, human eye is very sensitive to brightness, when film flicker frequency during greater than the frequency of human eye identification, will feel film flicker.
For improving picture display effect, as shown in Figure 1, the picture adjusting method of the embodiment of the invention one liquid crystal panel comprises the steps:
In embodiments of the present invention, can be according to the resolution and the reversal of poles mode of said liquid crystal panel, selecting flicker level is the test pictures of setting value.
For example can select the most serious picture of the flicker value of picture as test pictures.So, after the most serious test pictures of this flicker value was adjusted flicker value, the picture that other flicker value is littler just more can satisfy the requirement of user to display quality.That is to say that select the most serious picture of flicker value as test pictures, the picture display effect of the liquid crystal panel that obtains is better.Should " flicker level is a setting value " can freely define according to the fine or not of display quality that expectation obtains by the user.
Wherein reversal of poles mode comprises: row counter-rotating, row counter-rotating, some counter-rotating or the like.In embodiments of the present invention, test pictures and liquid crystal panel are sub-pixel point corresponding sub-pixel points, and when pixel voltage reversed, the brightness changing value was maximum, and the film flicker degree is maximum.
Step 121, constantly adjust the common reference voltage of said liquid crystal panel, and obtain the flicker value of different common reference voltage.
Step 122, said flicker value is quantized.
Step 123, will compare with preset critical flicker value through the flicker value that quantizes.
Because human eye has certain limit for the perception of film flicker,,, can be this value defined the critical flicker value even the film flicker human eye also can't perception when the flicker level of picture during less than certain value.Certainly, other numerical value littler than this critical flicker value all can be used as the critical flicker value, and the display quality of the display frame that obtains like this can be higher.
Step 124, when said difference through the flicker value that quantizes and said preset critical flicker value satisfied first when pre-conditioned; The common reference voltage of repeating step 121 and 122 the said liquid crystal panel of adjustment; Make said pre-conditioned with the difference satisfied first of said preset critical flicker value through the flicker value that quantizes; And when said difference satisfied first through the flicker value that quantizes and said preset critical flicker value is pre-conditioned; Obtain the said corresponding common reference voltage of flicker value through quantizing, and with said common reference voltage as critical common reference voltage.
In this step, the quality of the said first pre-conditioned display effect that can be sought out according to him by the user is confirmed, for example can be a value, also can be a scope.Preferably; In embodiments of the present invention; Can during less than said preset critical flicker value, promptly obtain the said corresponding common reference voltage of flicker value through the flicker value that quantizes said through quantizing, and with said common reference voltage as critical common reference voltage VCOM.
What the Gamma curve reflected is the panel penetrance size under the different GTGs, and the panel penetrance is directly related with brightness, and penetrance is relevant with the voltage that is applied on the liquid crystal molecule.But, because this corresponding relation is non-linear, tend in photoelectric conversion process, lose, therefore will be to this non-linear compensating, with the perceptibility of reduction human eye to difference in brightness.In addition, the voltage under the different GTGs that the Gamma curve is corresponding is to be realized by different resistance string dividing potential drops.
In embodiments of the present invention, the quantity of GTG of test as required can obtain the GTG picture of different GTGs through software unit, 64 GTG pictures for example, 128 GTG pictures, 256 GTG pictures etc.
In the process of gamma curve adjustment; Because the reflection of Gamma curve is the panel penetrance size under the different GTGs; The panel penetrance is directly related with brightness; And penetrance is relevant with the voltage that is applied on the liquid crystal molecule, so the real embodiment of constantly adjusting the source electrode driver voltage of liquid crystal panel and obtaining the process of different brightness value is exactly the variation of the gamma curve of this liquid crystal panel.Thus, it is second pre-conditioned whether the gamma curve of GTG picture satisfies, and is that the difference between the penetrance (brightness value) of penetrance (brightness value) and desirable gamma curve through certain point on this curve embodies.
Carrying out gamma curve when adjustment, can be according to the grey exponent number of selected GTG picture, confirm the pairing voltage of the brightest GTG and dull gray rank.So, can in the scope of the pairing voltage of this brightest GTG and dull gray rank, regulate.In the process of adjustment, can comprise:
The source electrode driver voltage of step 141, the said liquid crystal panel of adjustment, and the brightness value of acquisition said each GTG of GTG picture under different source electrode driver voltage.Simultaneously, the corresponding relation of said brightness value and said GTG picture being done normalization handles.
Step 142, said brightness value and preset value are compared.
Step 143, do not satisfy second when pre-conditioned when the difference of said brightness value and preset value; Repeat to adjust the source electrode driver voltage of said liquid crystal panel; Make that the difference satisfied second of said brightness value and preset value is pre-conditioned; And satisfy second when pre-conditioned in the difference of said brightness value and preset value, obtain the corresponding source electrode driver voltage of said brightness value, and with said source electrode driver voltage as said critical source electrode driver voltage.
In this step, the quality of the said second pre-conditioned display effect that can be sought out according to him by the user is confirmed, for example can be a value, also can be a scope.
It should be noted that in the process of gamma curve adjustment, the critical VCOM that is obtained according to step 11 and 12 remains unchanged.After the critical source electrode driver voltage that obtains acts on the liquid crystal panel, can change the anglec of rotation of liquid crystal molecule, thereby change the penetrance of panel, and change the brightness under each GTG simultaneously.The picture adjusting method of the liquid crystal panel that the embodiment of the invention provides; The flicker value adjustment and the adjustment of gamma curve of liquid crystal panel are combined; Also promptly on the basis of the adjustment of carrying out the test pictures flicker value; Carry out the adjustment of gamma curve once more, obtain critical common reference voltage and critical source electrode driver voltage and act on liquid crystal panel.Because this critical common reference voltage and critical source electrode driver voltage are to make the shake and the image distortion of picture therefore, can improve the picture display effect of liquid crystal panel.
After finishing the adjustment of gamma curve, also can carry out the flicker value adjustment once more, thereby further improve the picture display effect of liquid crystal panel.
In addition, in order to improve adjustment efficient, conveniently adjust the picture display effect of panel, as shown in Figure 2, on basis shown in Figure 1, the picture adjusting method of the liquid crystal panel of the embodiment of the invention two also can comprise:
Below, describing in detail in conjunction with embodiment three is how to realize film flicker and the adjustment of gamma curve.
Need supposing a resolution of adjustment is M*N, and reversed polarity is the some counter-rotating, and source electrode driver is the liquid crystal panel of 8bit, can use test macro as shown in Figure 3.Detailed process is following:
Connect under the normal situation in whole test system; Be the test pictures of M*N through the 312 selected resolution of the software unit in the dynamic adjustment unit 31 at first, simultaneously according to reversed polarity, test pictures satisfies the requirement that point is lighted at interval; Promptly the odd point of this test pictures shows, even number point does not show.Because human eye is the most responsive to green, will be green so the point that shows shows, test pictures as shown in Figure 4 (among the figure with the shown in green point of grey colour specification).According to the test pictures that aforesaid way is selected, its flicker level is maximum.The HDMI/VGA/DVI of signal generating unit 311 is converted to LVDS/mini-LVDS by signal controlling and converting unit 34.
Then start optic test unit 32, obtain the flicker value of test pictures, and this numerical value is fed back to dynamic adjustment unit 31; Dynamically adjustment unit 31 converts this numerical value to corresponding VCOM voltage; So that adjustment VCOM voltage, adjusted critical VCOM magnitude of voltage stores in the storage unit 33, and writes in the driver in the liquid crystal panel 35 through signal controlling and converting unit 34; Thereby affact on the liquid crystal pixel, reach the purpose of the flicker value of adjustment test pictures.The wherein dynamically course of work of adjustment unit such as the description in the step 12.
After VCOM voltage is adjusted, will carry out the adjustment of gamma curve.Need to prove that in the process of adjustment gamma curve, critical VCOM voltage will remain unchanged.Gamma curve adjustment process is following:
At first in software unit 312, need confirming the grey exponent number of debugging, can select the different gray levels number according to the debugging degree of accuracy, is example with 256 GTGs for example.Then, confirm the pairing magnitude of voltage of the brightest GTG and dull gray rank again.According to gamma curve normalization principle, the penetrance on the brightest GTG and dull gray rank is respectively 100% and 0%, so the voltage on the brightest GTG and dull gray rank can be confirmed accordingly.Thus, can confirm the debugging scope determined scope of voltage of the voltage of the brightest GTG and dull gray rank (promptly by) of a source electrode driver voltage, so that fast and effeciently regulate.
Then, as required, set the standard deviation of actual gamma curve and desirable gamma curve.Because therefore the nonlinear relationship of gamma curve can set different standard deviations, thereby make that the adjustment of gamma curve is easy, quick, efficient.For example, than dull gray rank places (like GTG 0-GTG 50) but the established standards difference is 0.1%, at middle GTG place (like GTG 51-GTG 150) but the established standards difference is 0.15%, at brighter GTG place (like GTG 151-GTG 255) but the established standards difference is 0.2%.After the pairing voltage of ash exponent number, the brightest GTG and dull gray rank, standard deviation configure, start optic test unit 32, the brightness of each GTG is tested.Dynamically adjustment unit 31 compares the brightness value and the preset value of each GTG; When the difference of said brightness value and preset value is in preset range; Obtain the corresponding source electrode driver voltage of said brightness value, and with said source electrode driver voltage as said critical source electrode driver voltage.Through signal controlling and converting unit 34 this critical source electrode driver voltage is written in the source electrode driver in the liquid crystal panel then; Reach the purpose of adjustment liquid crystal pixel voltage; Thereby change the anglec of rotation of liquid crystal molecule, change the penetrance of panel, the brightness of GTG simultaneously also changes thereupon.So just, can reach actual gamma curve infinitely near the purpose of ideal curve, realize the optimization of picture display quality.
In this embodiment, obtain test pictures and GTG picture, in prior art, utilize special equipment to obtain test pictures and GTG picture, can reduce cost through the software unit 312 in the dynamic adjustment unit 31.
Can find out by the foregoing description, combine, can improve the picture display effect of liquid crystal panel through flicker value adjustment and the adjustment of gamma curve with liquid crystal panel.
In addition, as shown in Figure 5, the embodiment of the invention also provides a kind of picture regulator of liquid crystal panel, comprising:
Picture and selecting unit 51 is used to select test pictures; Flicker value adjustment unit 52 is used to obtain and adjust the flicker value of said test pictures, and it is first pre-conditioned to make that the flicker value of said test pictures satisfies, and obtains the corresponding critical common reference voltage of adjusted flicker value; Picture selected cell 53 is used to obtain the GTG picture; Gamma curve adjustment unit 54 is used for the gamma curve of said GTG picture is adjusted, and makes that the gamma curve satisfied second of said GTG picture is pre-conditioned, and obtains the corresponding critical source electrode driver voltage of adjusted gamma curve.
Wherein, as previously mentioned, in embodiments of the present invention, can be according to the resolution and the reversal of poles mode of said liquid crystal panel, selecting flicker level is the test pictures of setting value.For example can select the most serious picture of the flicker value of picture as test pictures.So, after the most serious test pictures of this flicker value was adjusted flicker value, the picture that other flicker value is littler just more can meet the demands.That is to say that select the most serious picture of flicker value as test pictures, the picture display effect of the liquid crystal panel that obtains is better.Therefore, said picture and selecting unit 51 specifically is used for according to the resolution of said liquid crystal panel and reversal of poles mode, and selecting flicker level is the test pictures of setting value.Wherein, the implication of " flicker level is a setting value " is with aforesaid identical.
Further, said flicker value adjustment unit 52 comprises: voltage regulator module is used to adjust the common reference voltage of said liquid crystal panel, and obtains corresponding flicker value; Quantization modules is used for said flicker value is quantized; Comparison module is used for comparing with preset critical flicker value through the flicker value that quantizes; Processing module; Be used for when said difference through the flicker value that quantizes and said preset critical flicker value satisfied first when pre-conditioned; Repeat to adjust the common reference voltage of said liquid crystal panel; Make said pre-conditioned with the difference satisfied first of said preset critical flicker value through the flicker value that quantizes; And satisfying first when pre-conditioned in said difference through the flicker value that quantizes and said preset critical flicker value, obtains the common reference voltage of said flicker value correspondence through quantification, and with said common reference voltage as critical common reference voltage.
Further; Said gamma curve adjustment unit 54 comprises: voltage regulator module; Be used to adjust the source electrode driver voltage of said liquid crystal panel; The brightness value of acquisition said each GTG of GTG picture under different source electrode driver voltage, and said brightness value and said GTG picture corresponding relation are done normalization handle; Comparison module is used for said brightness value and preset value are compared; Processing module; Be used for not satisfying second when pre-conditioned when the difference of said brightness value and preset value; Repeat to adjust the source electrode driver voltage of said liquid crystal panel, it is second pre-conditioned to make that the difference of said brightness value and preset value satisfies, and when the difference of said brightness value and preset value satisfied second is pre-conditioned; Obtain the corresponding source electrode driver voltage of said brightness value, and with said source electrode driver voltage as said critical source electrode driver voltage.
That wherein describes among first pre-conditioned and the second pre-conditioned meaning and the method embodiment is identical.
In addition, as shown in Figure 6, said device also can further comprise: storage unit 55 is used to store said critical common reference voltage and said critical source electrode driver voltage.
The principle of work of wherein said device can be with reference to the description among the preceding method embodiment.
The picture regulator of the liquid crystal panel that the embodiment of the invention provides combines adjustment of the flicker value of liquid crystal panel and the adjustment of gamma curve, therefore, can improve the picture display effect of liquid crystal panel.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method; Be to instruct relevant hardware to accomplish through computer program; Described program can be stored in the computer read/write memory medium; This program can comprise the flow process like the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
The above; Be merely embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; Can expect easily changing or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of said claim.
Claims (10)
1. the picture adjusting method of a liquid crystal panel is characterized in that, comprising:
Select test pictures;
Obtain and adjust the flicker value of said test pictures, make that the flicker value satisfied first of said test pictures is pre-conditioned, and obtain the corresponding critical common reference voltage of adjusted flicker value;
Obtain the GTG picture;
Gamma curve to said GTG picture is adjusted, and makes that the gamma curve satisfied second of said GTG picture is pre-conditioned, and obtains the corresponding critical source electrode driver voltage of adjusted gamma curve.
2. method according to claim 1 is characterized in that, said selection test pictures is specially:
According to the resolution and the reversal of poles mode of said liquid crystal panel, selecting flicker level is the test pictures of setting value.
3. method according to claim 1; It is characterized in that; Said acquisition is also adjusted the flicker value of said test pictures, and it is first pre-conditioned to make that the flicker value of said test pictures satisfies, and obtains the corresponding critical common reference voltage of adjusted flicker value and comprise:
Adjust the common reference voltage of said liquid crystal panel, and obtain corresponding flicker value;
Said flicker value is quantized;
To compare with preset critical flicker value through the flicker value that quantizes;
When said difference through the flicker value that quantizes and said preset critical flicker value satisfied first when pre-conditioned; Repeat to adjust the common reference voltage of said liquid crystal panel; Until said pre-conditioned with the difference satisfied first of said preset critical flicker value through the flicker value that quantizes; And when said difference satisfied first through the flicker value that quantizes and said preset critical flicker value is pre-conditioned; Obtain the said corresponding common reference voltage of flicker value through quantizing, and with said common reference voltage as critical common reference voltage.
4. method according to claim 1; It is characterized in that; Said gamma curve to said GTG picture is adjusted, and it is second pre-conditioned to make that the gamma curve of said GTG picture satisfies, and obtains the corresponding critical source electrode driver voltage of adjusted gamma curve and comprise:
Adjust the source electrode driver voltage of said liquid crystal panel, obtain the brightness value of said each GTG of GTG picture under different source electrode driver voltage, and the corresponding relation of said brightness value and said GTG picture is done normalization handle;
Said brightness value and preset value are compared;
When the difference of said brightness value and preset value does not satisfy second when pre-conditioned; Repeat to adjust the source electrode driver voltage of said liquid crystal panel; Difference satisfied second until said brightness value and preset value is pre-conditioned; And satisfy second when pre-conditioned in the difference of said brightness value and preset value, obtain the corresponding source electrode driver voltage of said brightness value, and with said source electrode driver voltage as said critical source electrode driver voltage.
5. according to the arbitrary described method of claim 1-4, it is characterized in that said method also comprises:
Store said critical common reference voltage and said critical source electrode driver voltage.
6. the picture regulator of a liquid crystal panel is characterized in that, comprising:
The picture and selecting unit is used to select test pictures;
The flicker value adjustment unit is used to obtain and adjust the flicker value of said test pictures, and it is first pre-conditioned to make that the flicker value of said test pictures satisfies, and obtains the corresponding critical common reference voltage of adjusted flicker value;
The picture selected cell is used to obtain the GTG picture;
The gamma curve adjustment unit is used for the gamma curve of said GTG picture is adjusted, and makes that the gamma curve satisfied second of said GTG picture is pre-conditioned, and obtains the corresponding critical source electrode driver voltage of adjusted gamma curve.
7. device according to claim 6 is characterized in that, said picture and selecting unit specifically is used for according to the resolution of said liquid crystal panel and reversal of poles mode, and selecting flicker level is the test pictures of setting value.
8. device according to claim 6 is characterized in that, said flicker value adjustment unit comprises:
Voltage regulator module is used to adjust the common reference voltage of said liquid crystal panel, and obtains corresponding flicker value;
Quantization modules is used for said flicker value is quantized;
Comparison module is used for comparing with preset critical flicker value through the flicker value that quantizes;
Processing module; Be used for when said difference through the flicker value that quantizes and said preset critical flicker value satisfied first when pre-conditioned; Repeat to adjust the common reference voltage of said liquid crystal panel; Make said pre-conditioned with the difference satisfied first of said preset critical flicker value through the flicker value that quantizes; And satisfying first when pre-conditioned in said difference through the flicker value that quantizes and said preset critical flicker value, obtains the common reference voltage of said flicker value correspondence through quantification, and with said common reference voltage as critical common reference voltage.
9. device according to claim 6 is characterized in that, said gamma curve adjustment unit comprises:
Voltage regulator module is used to adjust the source electrode driver voltage of said liquid crystal panel, obtains the brightness value of said each GTG of GTG picture under different source electrode driver voltage, and said brightness value and said GTG picture corresponding relation are done the normalization processing;
Comparison module is used for said brightness value and preset value are compared;
Processing module; Be used for not satisfying second when pre-conditioned when the difference of said brightness value and preset value; Repeat to adjust the source electrode driver voltage of said liquid crystal panel, it is second pre-conditioned to make that the difference of said brightness value and preset value satisfies, and when the difference of said brightness value and preset value satisfied second is pre-conditioned; Obtain the corresponding source electrode driver voltage of said brightness value, and with said source electrode driver voltage as said critical source electrode driver voltage.
10. according to the arbitrary described device of claim 6-9, it is characterized in that said device also comprises:
Storage unit is used to store said critical common reference voltage and said critical source electrode driver voltage.
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| CN103761956B (en) * | 2013-12-20 | 2016-03-02 | 武汉精立电子技术有限公司 | The comprehensive adjusting process of Gamma-Flicker of liquid crystal display |
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| CN101295472A (en) * | 2007-04-24 | 2008-10-29 | 北京京东方光电科技有限公司 | LCD device high dynamic contrast processing equipment and method |
| CN101388183A (en) * | 2007-09-10 | 2009-03-18 | 北京京东方光电科技有限公司 | LCD device high dynamic contrast processing equipment and method |
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Address after: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee after: Hisense Visual Technology Co., Ltd. Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee before: QINGDAO HISENSE ELECTRONICS Co.,Ltd. |