CN101009075A - Display device with compensable environmental brightness - Google Patents
Display device with compensable environmental brightness Download PDFInfo
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- CN101009075A CN101009075A CN 200610004540 CN200610004540A CN101009075A CN 101009075 A CN101009075 A CN 101009075A CN 200610004540 CN200610004540 CN 200610004540 CN 200610004540 A CN200610004540 A CN 200610004540A CN 101009075 A CN101009075 A CN 101009075A
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Abstract
This invention relates to one display device to compensate environment brightness, which comprises the following parts: one sensor to send outer brightness to generate one sense signals; one controller connected to the sensor to process one original image signals and to generate one image signals; one image output device to output one image picture; the controller comprises one image signal adjuster to adjust original signals to compensate outer environment brightness and to generate one image signals; one gains controller connected to the image signal adjuster to process the image signals.
Description
Technical field
The present invention relates to a kind of display device, particularly relate to a kind of display device that can compensate external environment brightness.
Background technology
Display device has become one of the indispensable electronic product of people, and nearly all electronic installation all must be passed on away information by display device.For instance, computer system must pass to the user with the practice condition of application program by display device, and mobile phone also must show communicating data by display device.In addition, along with the prosperity of consumption electronic products, display device miscellaneous, such as common on the market LCD, plasma display, inner projection TV or the like more becomes the essential product in the consumer family; And the evolution history of display device also becomes recently LCD or plasma display panel gradually by early stage cathode ray tube (CRT) display.
See also Fig. 1 at this, Fig. 1 is the characteristic synoptic diagram of family curve and video recording equipment γ=1/2.2 of CRT monitor γ=2.2.Known as industry, for CRT monitor, because its electron gun reaction time or the like characteristic, for user's visual effect, the relation of the RGB yield value of its input and output brightness (luminance) roughly meets the family curve of γ shown in Figure 1=2.2; In addition, because early stage display device all is to adopt CRT monitor, therefore the characteristic of corresponding video recording equipment also must correspondingly have the inverse curve of γ shown in Figure 1=1/2.2, thus, for the user, but whole visual effect is the linearity curve of γ=1 of convergence (dotted line as shown in Figure 1) just, and thus, the picture that shows just can meet the visual effect of real world.
Yet, though present other display of a large amount of employing LCD or plasma display or the like on the market, but because the characteristic of most video recording equipments still meets the inverse curve of γ=1/2.2, therefore all displays still must meet the restriction of family curve γ=2.2, and the image that could make the user see meets the situation of real world.
In general, the most likely additional environment brightness impression of at present common on the market LCD is surveyed device (ambient sensor), with the control brightness of backlight module, with the brightness of the corresponding environment of its display brightness; Easy speech, when the brightness of background environment was too dark or too bright, the picture of display screen can footpath row adjustment, so the user can't be because of the change of ambient brightness, and thought that the picture of display screen is too dazzling or too dark.
But such way has its shortcoming.See also Fig. 2 at this, Fig. 2 is the synoptic diagram that the family curve of LCD changes.Because directly adjust brightness of backlight module, way is not distributed the yield value of RGB with the ratio of original family curve γ=2.2; In other words, when brightness of backlight module changed, for the image signal of RGB, because its RGB yield value changes, the RGB blend of colors of handling image signal later changed than regular meeting thereupon, so can make the effect distortion of show image.For instance, as shown in Figure 2, if with backlight illumination adjust stronger, just family curve can be by the curve offset of script γ=2.2 family curve to curvature lower (such as γ=1.2) so; On the other hand, if with backlight illumination adjust more weak, just family curve can be by the curve offset of script γ=2.2 family curve to curvature higher (such as γ=3.2) so.Clearly, such result can make display frame depart from the curve of γ=2.2 originally, and then cause the detail section of picture unclear, form whole picture exposure too high (picture color is too white), or too dark (picture color is too black) the ambiguous phenomenon of details.
Summary of the invention
Therefore a purpose of the present invention provides and a kind ofly not only can adjust display brightness according to external environment brightness, but also can take into account the display device of the readability of image output picture simultaneously, to solve the problems of the prior art.
The present invention discloses a kind of display device of compensable environmental brightness, this display device includes: a sensor is used for the brightness of sensing external environment, to produce a sensing signal of corresponding external environment brightness; One controller is electrically connected to this sensor, is used for handling a raw video signal according to this sensing signal and adjusts the back image signal to produce one; One image output device is electrically connected to this controller, is used for exporting an image frame according to this adjustment back image signal.Wherein this controller includes: an image signal adjuster is used for adjusting this raw video signal compensating this external environment brightness according to this sensing signal, and produces a compensation back image signal; And a gain controller, be electrically connected on this image signal adjuster, be used for adjusting a gain setting, and use this gain setting that this compensation back image signal is carried out gain process to produce this adjustments image signal afterwards according to this sensing signal.
The present invention has also disclosed a kind of display device of compensable environmental brightness, and this display device includes: a display light source; One sensor is used for the brightness of sensing external environment, to produce a sensing signal of corresponding external environment brightness; One controller is electrically connected to this sensor and this display light source, is used for handling a raw video signal according to this sensing signal and adjusts the back image signal to produce one; And an image output device, be electrically connected to this controller, be used for exporting an image frame according to this adjustment back image signal.Wherein this controller includes: a light source adjuster is used for adjusting this display light source to compensate this external environment brightness according to this sensing signal; And a gain controller, be used for adjusting a gain setting, and use this gain setting that this raw video signal is carried out gain process to produce this adjustment back image signal according to this sensing signal.
The display frame of display device of the present invention not only can be reacted the brightness of external environment, also can take into account simultaneously the image output effect of γ=2.2; Therefore display device of the present invention can't change because of the brightness of picture, and has influence on the distribution curve of colors of image originally; In other words, darker or brighter even picture becomes, the detail section of display frame still can distortion.
Description of drawings
Fig. 1 is the characteristic synoptic diagram of family curve and video recording equipment γ=1/2.2 of CRT monitor γ=2.2.
Fig. 2 is the synoptic diagram that the family curve of LCD changes.
Fig. 3 is the functional block diagram of an embodiment of liquid crystal indicator of the present invention.
Fig. 4 is the process flow diagram of an operation embodiment of liquid crystal indicator shown in Figure 3.
Fig. 5 has illustrated the determining method of RGB yield value in the table of comparisons shown in Figure 3.
Fig. 6 is the functional block diagram of another embodiment of liquid crystal indicator of the present invention.
Fig. 7 is the process flow diagram of an operation embodiment of liquid crystal indicator shown in Figure 6.
The reference numeral explanation
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300、600 | The |
310、610 |
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320、620 | The table of |
321、621 |
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322、622 | |
330、630 |
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331 | The |
323 |
| Gain controller | 324、624 | The image signal adjuster | 623 |
Embodiment
See also Fig. 3 at this, Fig. 3 is the functional block diagram of an embodiment of liquid crystal indicator 300 of the present invention.As shown in Figure 3, liquid crystal indicator 300 includes ambient brightness sensor (ambientsensor) 310, one controllers (scaler) 320, one LCD Panel 330, and a backlight module 331.Its middle controller 320 includes a backlight module adjuster 323, one gain controllers 324, and a storage device 322, is used for storing comparison list 321.The connected mode of each assembly as shown in Figure 3, controller 320 is coupled to ambient brightness sensor 310, backlight module adjuster 323 is coupled to backlight module 331, gain controller 324 is coupled to the LCD Panel 330 and the table of comparisons 321.Backlight module adjuster 323 is used for adjusting this display light source to compensate this external environment brightness according to this sensing signal, also can be described as the light source adjuster at this, and the operation of liquid crystal indicator 300 and function will describe in following disclosure, so do not give unnecessary details in this in addition.
See also Fig. 4 at this, Fig. 4 is the process flow diagram of an operation embodiment of liquid crystal indicator 300.It includes the following step: at first, ambient brightness sensor 310 can detect the change (step 400) of ambient brightness, and brightness is exported a sensing signal to controller 320 (step 410) according to external environment, therefore, the backlight module adjuster 323 of controller 320 inside is just adjusted the brightness (step 420) of backlight module 331 according to the sensing signal.Note that as previously mentioned that at this blend of colors of RGB changes with the brightness of backlight module 331 than regular meeting, therefore the RGB blend of colors ratio after changing must be adjusted into and originally meet γ=2.2 characteristic RGB blend of colors ratio.
In the present embodiment, the table of comparisons 321 stores a plurality of gain settings and adjusts strategy, and the gain controller 324 of controller 320 inside is chosen a suitable gain setting according to the brightness of adjusting back backlight module 331 (or the sensing signal of ambient brightness sensor 310 outputs or the like) and is adjusted strategy in the table of comparisons 321, comes the ratio of adjustment RGB blend of colors.For instance, the table of comparisons 321 can store many data, and each data for the brightness of adjusting back backlight module 331 with and the corresponding relation of corresponding RGB yield value.Thus, gain controller 324 just can be chosen the RGB yield value (step 430) of a correspondence according to the brightness of adjusting back backlight module 331 in the table of comparisons 321; Then, gain controller 324 carries out gain process according to the RGB yield value of choosing out to the raw video signal, adjusts back image signal (step 440) to produce, and LCD Panel 330 is just according to adjusting back image signal image output picture (step 450).
Note that the RGB yield value of the correspondence that in the table of comparisons 321, obtains and the synthetic effect of the brightness of adjusting back backlight module 3 31 at this, meet the characteristic display effect in γ=2.2; In other words, adjustment back image signal can meet γ=2.2 family curves with the image display effect of the brightness of adjusting back backlight module 331; Therefore, the present invention not only can change the brightness of LCD Panel 330 along with the variation of ambient brightness, also can take into account the effect of image output simultaneously, makes that image can't the distortion because of the brightness change of LCD Panel.
And in the table of comparisons 321 data build the mode of putting, for those skilled in the art should be familiar with; For instance, before liquid crystal indicator 300 dispatches from the factory, can obtain some setting values via experiment repeatedly, and these setting values can be stored in just in the table of comparisons 321, use for controller 320.See also Fig. 5 at this, Fig. 5 has illustrated the determining method of RGB yield value in the table of comparisons 321.As previously mentioned, because the brightness of backlight module 331 changes, the family curve of whole liquid crystal indicator 300 is changed; Brightness at this hypothesis backlight module 331 increases, so family curve just becomes γ=1.2 by γ=2.2 originally, and the raw video signal of corresponding A point originally, its brightness also corresponds to B point among the figure because of characteristic change.Because the B RGB blend of colors ratio of ordering, and do not meet the characteristic of γ=2.2; Therefore the present invention's characteristic of directly utilizing C to order, as shown in Figure 5, the brightness value that C is ordered is on the A point, and owing to the C point is positioned on the family curve of γ=2.2, so if controller 320 utilizes the pairing RGB yield value of C point that original signal is handled, image signal not only can react the brightness of external environment after the adjustment that is drawn, and also can take into account simultaneously the image output effect of γ=2.2.
In addition, in preferred embodiment of the present invention, the deviser can only determine the grade (level) of several backlight module 331 brightness, for example the size with external environment brightness is set at bright, little bright, duskiness, dark four grades, and the brightness adjustment of backlight module 331 also only need have four kinds of different correction grades; Thus, the data volume of the table of comparisons 321 required storages can't be too huge, so the storage device 322 of controller 320 inside also do not need excessive capacity, and this can save the cost of some liquid crystal indicators 300; Certainly, the present invention does not limit the stored data volume of the table of comparisons 321; In other words, if the consideration of cost free, backlight module 331 can have more kinds of correction grades, makes LCD Panel 300 more accurate for the reaction of external environment brightness.
Note that in the foregoing embodiments that at this present invention reacts the change of external environment brightness by the brightness of backlight module adjustment.Yet, the present invention also can directly compensate earlier the raw video signal, to change the overall brightness of LCD Panel 330 image outputs, again by the data in the table of comparisons 321, image signal after the compensation is adjusted again, so just can on LCD Panel 330, be presented the display frame that brightness and display effect have both.
See also Fig. 6 at this, Fig. 6 is the functional block diagram of an embodiment of liquid crystal indicator 600 of the present invention.As shown in Figure 6, liquid crystal indicator 600 includes ambient brightness sensor (ambientsensor) 610, one controllers (scaler) 620, one LCD Panel 630.Its middle controller 620 includes an image signal adjuster 623, one gain controllers 624, and a storage device 622, is used for storing comparison list 621.The connected mode of each assembly as shown in Figure 6, controller 620 is coupled to ambient brightness sensor 610, gain controller 624 is coupled to image signal adjuster 623 and LCD Panel 630.And the operation of liquid crystal indicator 600 and function will describe in following disclosure, so do not give unnecessary details in this in addition.
See also Fig. 7 at this, Fig. 7 is the process flow diagram of an operation embodiment of liquid crystal indicator 600.It includes the following step: at first, ambient brightness sensor 610 detects the variation (step 700) of ambient brightness, and brightness is exported a sensing signal to controller 620 (step 710) according to external environment.In present embodiment, the image signal adjuster 623 of controller 620 inside directly compensates the raw video signal; For instance, if extraneous ambient brightness grow, image signal adjuster 623 can directly increase R, G, the B value (step 720) of a residual quantity Δ to the raw video signal, to draw compensation image signal (R+ Δ, G+ Δ, B+ Δ) afterwards; Clearly, the RGB color assignment ratio of compensation back image signal (R+ Δ, G+ Δ, B+ Δ) is different with the RGB color assignment ratio of raw video signal, therefore the gain controller 624 of controller 620 inside is chosen the RGB yield value (step 730) of a correspondence in the table of comparisons 621, come to carry out gain process to compensating back image signal (R+ Δ, G+ Δ, B+ Δ), adjust back image signal (step 740) to produce, LCD Panel 630 is just according to adjusting back image signal image output picture (step 750).
Note that in present embodiment, adjust the family curve that the back image signal meets γ=2.2, and its corresponding brightness is also come highly than the pairing brightness of raw video signal; Therefore can make the display frame of LCD Panel 630, not only can react the brightness of external environment, also can take into account simultaneously the image output effect of γ=2.2.In addition and since in the present embodiment table of comparisons 621 build the mode of putting and the aforementioned table of comparisons 321 to build the mode of putting identical haply, so do not give unnecessary details in this in addition.
Note that at this present invention does not limit the environment brightness impression and surveys the reality of device 310,610 and make mode, for instance, ambient brightness sensor 310,610 can utilize photosensitive integrated circuit, photodiode, and photoresistance or other light sensing component are implemented; So corresponding variation also belongs to category of the present invention.
In addition, aforesaid liquid crystal indicator only is a preferred embodiment of the present invention, is not restriction of the present invention; In other words, the present invention can be applied in other display device miscellaneous or image output device, such as plasma display, the inner projection display, or projector or the like, so corresponding variation is also without prejudice to spirit of the present invention.
In addition, aforesaid adjustment back image signal, the raw video signal, and image signal is the RGB signal after the compensation, however the RGB signal only is a preferred embodiment of the present invention, is not restriction of the present invention; In other words, spirit of the present invention can be applied in other the image signal, and so corresponding variation is also without prejudice to spirit of the present invention.
Compared to prior art, the display frame of display device of the present invention not only can be reacted the brightness of external environment, also can take into account simultaneously the image output effect of γ=2.2; Therefore display device of the present invention can't change because of the brightness of picture, and has influence on the distribution curve of colors of image originally; In other words, darker or brighter even picture becomes, the detail section of display frame still can distortion.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (10)
1. the display device of a compensable environmental brightness, this display device includes:
One sensor, the brightness of sensing external environment is to produce a sensing signal;
One controller is electrically connected to this sensor, and according to this sensing signal, produces one and adjust the back image signal, and this controller includes:
One image signal adjuster according to this sensing signal, compensates this external environment brightness, and produces a compensation back image signal; And
One gain controller is electrically connected on this image signal adjuster, according to this sensing signal, adjusts a gain setting, and uses this gain setting that this compensation back image signal is carried out gain process to produce this adjustment back image signal; And
One image output device is electrically connected to this controller, exports an image frame according to this adjustment back image signal.
2. the display device of compensable environmental brightness as claimed in claim 1, wherein this gain controller is also adjusted this gain setting according to a particular gamma curve.
3. the display device of compensable environmental brightness as claimed in claim 2, wherein the curvature of this particular gamma curve is 2.2.
4. the display device of compensable environmental brightness as claimed in claim 1 also includes:
One storage device is electrically connected on this controller, is used for storing comparison list, and this table of comparisons is noted down a plurality of gain settings and adjusted strategy;
Wherein this gain controller is chosen a gain setting adjustment strategy according to this sensing signal from this table of comparisons and is adjusted this gain setting.
5. the display device of compensable environmental brightness as claimed in claim 1, wherein this compensation back image signal and this adjustment afterwards image signal formed by the red green blue tricolor signal.
6. the display device of a compensable environmental brightness, this display device includes:
One display light source;
One sensor is used for the brightness of sensing external environment, to produce a sensing signal of corresponding external environment brightness;
One controller is electrically connected to this sensor and this display light source, is used for handling a raw video signal according to this sensing signal and adjusts the back image signal to produce one, and this controller includes:
One light source adjuster is used for adjusting this display light source to compensate this external environment brightness according to this sensing signal; And
One gain controller is used for adjusting a gain setting according to this sensing signal, and uses this gain setting that this raw video signal is carried out gain process to produce this adjustment back image signal; And
One image output device is electrically connected to this controller, is used for exporting an image frame according to this adjustment back image signal.
7. the display device of compensable environmental brightness as claimed in claim 6, wherein this gain controller is also adjusted this gain setting according to a particular gamma curve.
8. the display device of compensable environmental brightness as claimed in claim 7, wherein the curvature of this particular gamma curve is 2.2.
9. the display device of compensable environmental brightness as claimed in claim 6 also includes:
One storage device is electrically connected on this controller, is used for storing comparison list, and this table of comparisons is noted down a plurality of gain settings and adjusted strategy;
Wherein this gain controller is chosen a gain setting adjustment strategy according to this sensing signal from this table of comparisons and is adjusted this gain setting.
10. the display device of compensable environmental brightness as claimed in claim 6, wherein this raw video signal and this adjustment back image signal is made up of the red green blue tricolor signal.
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| CNB2006100045402A CN100468495C (en) | 2006-01-27 | 2006-01-27 | Display device with compensable environmental brightness |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101493202A (en) * | 2009-03-06 | 2009-07-29 | 北京中庆微数字设备开发有限公司 | Brightness adjustable luminous indicator |
| CN102148020A (en) * | 2010-02-10 | 2011-08-10 | 元太科技工业股份有限公司 | Light-to-dark transition display device, display and brightness adjusting method |
| CN101483738B (en) * | 2008-01-10 | 2011-11-23 | 普诚科技股份有限公司 | Image regulation apparatus |
| CN102654992A (en) * | 2011-03-04 | 2012-09-05 | 富士通天株式会社 | Image processing apparatus |
| CN103165099A (en) * | 2011-12-15 | 2013-06-19 | 罗伯特·博世有限公司 | Display device |
| CN104966507A (en) * | 2015-07-02 | 2015-10-07 | 广东小天才科技有限公司 | Method and device for adjusting display effect of display screen |
| CN106448612A (en) * | 2015-08-06 | 2017-02-22 | 联发科技股份有限公司 | Electronic device capable of displaying and performing color compensation and color compensation method |
| CN106595871A (en) * | 2016-12-16 | 2017-04-26 | 中国科学院长春光学精密机械与物理研究所 | Infrared target simulator grayscale adaptive linear correction device and correction method |
| CN107705767A (en) * | 2017-10-27 | 2018-02-16 | 苏州佳世达电通有限公司 | Display device and color correcting method |
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| CN101483738B (en) * | 2008-01-10 | 2011-11-23 | 普诚科技股份有限公司 | Image regulation apparatus |
| CN101493202B (en) * | 2009-03-06 | 2014-05-07 | 北京中庆微数字设备开发有限公司 | Brightness adjustable luminous indicator |
| CN101493202A (en) * | 2009-03-06 | 2009-07-29 | 北京中庆微数字设备开发有限公司 | Brightness adjustable luminous indicator |
| CN102148020A (en) * | 2010-02-10 | 2011-08-10 | 元太科技工业股份有限公司 | Light-to-dark transition display device, display and brightness adjusting method |
| CN102654992B (en) * | 2011-03-04 | 2015-02-11 | 富士通天株式会社 | Image processing apparatus |
| CN102654992A (en) * | 2011-03-04 | 2012-09-05 | 富士通天株式会社 | Image processing apparatus |
| CN103165099A (en) * | 2011-12-15 | 2013-06-19 | 罗伯特·博世有限公司 | Display device |
| CN104966507A (en) * | 2015-07-02 | 2015-10-07 | 广东小天才科技有限公司 | Method and device for adjusting display effect of display screen |
| CN106448612A (en) * | 2015-08-06 | 2017-02-22 | 联发科技股份有限公司 | Electronic device capable of displaying and performing color compensation and color compensation method |
| US10019925B2 (en) | 2015-08-06 | 2018-07-10 | Mediatek Inc. | Electronic device capable of displaying and performing color compensation and color compensation method |
| CN106448612B (en) * | 2015-08-06 | 2019-03-15 | 联发科技股份有限公司 | Electronic device, processor, color compensation method and storage medium |
| CN106595871A (en) * | 2016-12-16 | 2017-04-26 | 中国科学院长春光学精密机械与物理研究所 | Infrared target simulator grayscale adaptive linear correction device and correction method |
| CN107705767A (en) * | 2017-10-27 | 2018-02-16 | 苏州佳世达电通有限公司 | Display device and color correcting method |
| CN115050326A (en) * | 2022-08-15 | 2022-09-13 | 禹创半导体(深圳)有限公司 | Adaptive visible dimming method for OLED (organic light emitting diode) under strong light |
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