CN101650931B - Display device and method for controlling display brightness thereof - Google Patents
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Abstract
The invention discloses a display device and a method for controlling display brightness thereof. The device is characterized in that the display device is provided with a comparative table which is used for recording the brightness parameters respectively corresponding to a plurality of signal sources and a plurality of display time intervals; the processing module of the display device controls the brightness of the display device according to the comparative table; besides, when a user manually adjusts the brightness of the display device, the processing module also can modify the brightness parameters of total time intervals in the comparative table according to the adjusting results and algorithm. Therefore, the disadvantage that a user has to adjust the brightness of the display device one by one can be avoided.
Description
Technical field
The present invention relates to a kind of display device and method for controlling display brightness thereof, relate in particular to a kind of technical field that can come to revise automatically the brightness of all periods of display device according to user's back coupling adjustment.
Background technology
The user is when watching display, and it watches impression and environmental light brightness that very big relation is arranged, if surround lighting is strong excessively, then the user is not easy to see clearly the image that display shows.Therefore, most of display has lets the function of user's manual adjustment brightness, to adjust to preferable brightness, to let the user that the better impression of watching can be arranged.Yet environmental light brightness can change in time, the compelled constantly brightness of manual adjustment display of user.For addressing the above problem, existing display is set up the optical inductor brightness of adjustment display automatically.
Fig. 1 is the calcspar that can adjust the display device of brightness automatically of prior art.Among the figure, display device 1 comprises signal receiving module 11, display module 12, processing module 13 and optical inductor 14.The signal of video signal 112 that signal receiving module 11 receives from signal source 111, and processing module 13 is handled signal of video signal 112 with generation image data 131, and control display module 12 image data displayings 131.Optical inductor 14 is in order to the intensity of ambient light 15, and transmits light intensity value 141 to the processing module 13 that is detected.Processing module 13 judges whether light intensity value 141 is higher than default value, if then processing module 13 is heightened the brightness of display module 12.Thus, if watch at brighter environment, then display device 1 can be heightened brightness automatically, lets the beholder have and watches impression preferably.But set up the cost that optical inductor 14 can increase display device, and if the dissatisfied self-adjusting effect of beholder, the still constantly brightness of manual adjustment display device.
Therefore, how letting the user need not adjust display device brightness one by one and all can have preferable watching to experience in whole periods is a problem demanding prompt solution.
Summary of the invention
The present invention proposes in order to address the above problem, and its purpose is to provide a kind of display device and method for controlling display brightness thereof, to revise the display brightness of all the period of time effectively automatically according to user's back coupling adjustment.
In addition, another object of the present invention is to provide a kind of display device and method for controlling display brightness thereof, to revise the display brightness of all the period of time effectively automatically according to the unlike signal source.
According to the purpose of the invention described above, a kind of display device is provided, it comprises signal receiving module, timing module, storage module, display module, operational module and processing module.Display module is used for show image.Signal receiving module is used to receive the signal of video signal from a plurality of signal sources.Timing module is used to provide the current time.Storage module is used to store first algorithm and the table of comparisons, and the said table of comparisons is used to write down a plurality of signal sources and a plurality of display time interval is distinguished corresponding luminance parameter.Operational module is used to supply the user to switch these signal sources, with the signal source of definite current demonstration, and supplies the user to adjust the brightness of said display module.
Processing module is handled signal of video signal to produce image data; And the control display module shows said image data; And from the table of comparisons, find the luminance parameter of the signal source of corresponding current time and current demonstration, and control the brightness of display module according to the luminance parameter of finding.After the user adjusted the brightness of display module, processing module was according at least one corresponding luminance parameter of signal source of adjustment result and first algorithm modification each display time interval that the table of comparisons write down and said current demonstration.
Wherein, Storage module also stores second algorithm; And when in Preset Time, adjusting the brightness of display module behind user's switching signal source, processing module is revised each display time interval and at least one corresponding luminance parameter of the signal source after the said switching that the table of comparisons writes down according to the luminance parameter of the preceding signal source of adjustment result, second algorithm and switching.
Wherein, Storage module also stores algorithm; And when the brightness of user's adjustment display module in display time interval changes the back Preset Time, processing module is revised each display time interval that the said table of comparisons writes down and at least one corresponding luminance parameter of signal source of said current demonstration according to adjustment result and algorithm.
In addition, the present invention also provides a kind of method for controlling display brightness, and this method is used for receiving the display device of a plurality of signal sources, and this method for controlling display brightness comprises the following step.At first; Obtain the current time and judge the signal source of current demonstration; Then distinguish the table of comparisons of corresponding luminance parameter from writing down a plurality of signal sources and a plurality of display time interval; Find the luminance parameter of the signal source of corresponding current time and current demonstration, control the brightness of display device again according to the said luminance parameter of finding.When the user adjusts the brightness of display device, according at least one corresponding luminance parameter of signal source of adjustment result and first algorithm modification each display time interval that the table of comparisons write down and said current demonstration.
Wherein, Said method also comprises when in Preset Time, adjusting the brightness of display device behind user's switching signal source, revises each display time interval and at least one corresponding luminance parameter of the signal source after the said switching that the table of comparisons write down according to the adjustment result and second algorithm.
Wherein, Said method also comprises when the brightness of user's adjustment display device in display time interval changes the back Preset Time, according at least one corresponding luminance parameter of signal source of adjustment result and algorithm modification each display time interval that the table of comparisons write down and said current demonstration.
Description of drawings
Fig. 1 is the calcspar that can adjust the display device of brightness automatically of prior art;
Fig. 2 is the calcspar of the embodiment of display device provided by the present invention;
Fig. 3 is the flow chart of steps of first embodiment of method for controlling display brightness provided by the present invention;
Fig. 4 is the flow chart of steps of second embodiment of method for controlling display brightness provided by the present invention.
Main symbol description: 1,2 is display device, and 11,21 is signal receiving module, and 111 is signal source, and 112 is signal of video signal, and 12,24 is display module; 13,26 is processing module, and 131 is image data, and 14 is optical inductor, and 141 is light intensity value, and 15 is surround lighting; 211 is TV signal source, and 212 is the video-audio signal source, and 213 is computer signalling source, and 22 is timing module, and 221 is the current time; 23 is storage module, and 231 is first algorithm, and 232 is second algorithm, and 233 is algorithm; 234 is the table of comparisons, and 235 is luminance parameter, and 241 is display drive apparatus, and 242 is light-emitting device; 243 is display panel, and 244 is display buffer memory, and 25 is operational module, and 31～34,41～48 is steps flow chart.
Embodiment
Fig. 2 is the block diagram of the embodiment of display device provided by the present invention.Among the figure, display device 2 comprises signal receiving module 21, timing module 22, storage module 23, display module 24, operational module 25 and processing module 26.Display module 24 is used for show image, and it comprises display drive apparatus 241, light-emitting device 242, display panel 243 and display buffer memory 244.Signal receiving module 21 is used to receive the signal of video signal from TV signal source 211, video-audio signal source 212 and computer signalling source 213.Timing module 22 is used to provide the current time 221.Wherein, display module 24 is preferably LCD MODULE, and light-emitting device 242 is preferably back lighting device, and display panel 243 is preferably liquid crystal panel.
Storage module 23 is used to store first algorithm 231, second algorithm 232, algorithm 233 and the table of comparisons 234, and the said table of comparisons 234 a plurality of signal sources of record and a plurality of display time interval are distinguished the luminance parameter 235 of correspondence, shown in table one.In table one, the whole day demonstration time is divided into 8 periods, and there is different brightness parameter 235 in the corresponding unlike signal of each display time interval source.A display time interval for example in 12 point～15, the luminance parameter of TV signal source 211 is 0.8, and the luminance parameter in video-audio signal source 212 is 0.7, and the luminance parameter of computer signalling source 213 is 0.9.At this; Consider the environment for use of user to the unlike signal source; When if the user shows the signal of video signal of computer signalling source 213 with display device 2; Display device 2 is placed on the desk mostly and the user can use desk lamp to throw light on, and its surround lighting is stronger, so the luminance parameter of computer signalling source 213 is set than video-audio signal source 212 and TV signal source 211 height.And the user is to watch motion picture film mostly when showing the signal of video signal in video-audio signal sources 212 with display device 2, thus can close light, so that the luminance parameter in video-audio signal source 212 is set is lower than other two kinds of signal sources.In like manner, daytime display time interval luminance parameter setting than evening display time interval luminance parameter high.
Table one
The table of comparisons 234 is preferably manufacturer and when display device 2 is dispatched from the factory, is stored in the storage module 23.
Operational module 25 supplies the user to switch above-mentioned signal source 211～213, and for example telepilot or key groups with the signal source of definite current demonstration, and supply the user to adjust the brightness of said display module 24.Processing module 26 is handled signal of video signal with generation image data 261, and image data 261 is stored in display buffer memory 244, and control display drive apparatus 241, drives display panel 243 image data displayings 261 by it.
Processing module 26 is found the luminance parameter 235 of the signal source of corresponding current time 221 and current demonstration from the table of comparisons 234, and controls the brightness of display module 24 according to the luminance parameter of finding 235.For example, the driving voltage 262 of light-emitting device 242 can heightened or turn down to processing module 26 according to the luminance parameter of finding 235, changes the brightness of display module 24 thus.
If the user thinks that the brightness of display device does not suit and the manual brightness of adjusting display module 24 through operational module 25; The luminance parameter of other display time interval of also being write down according to the adjustment results modification table of comparisons 234 of processing module 26 then; Let the user need not thus in each display time interval manual adjustment all, and more effectively provide the user preferable watch impression.Preferred alter mode can comprise following several kinds of modes:
(1) switch and do not have under the situation that display time interval switches in the no signal source, if the brightness of user's manual adjustment display device, then the luminance parameter M of the signal source of corresponding current time and current demonstration can use algorithm one to revise in the table of comparisons 234:
M '=(1-α) * M+ α * M
Set... algorithm one
M
SetBe luminance parameter corresponding after the brightness of user's manual adjustment display device, α is the adjustment coefficient, and M ' is revised luminance parameter.With table one is example; If α is set at 0.7; When the user in the afternoon 4 thirty manual adjustment display device 2 TV signal source 211 brightness to 0.7 time, then in the table one, TV signal source luminance parameter after the correction of 15 o'clock to 18 o'clock display time interval is following result of calculation:
(1-0.7)×0.6+0.7×0.7＝0.18+0.49＝0.67
Shown in table two.
Table two
(2) switch and do not have under the situation that display time interval switches in the no signal source, if the brightness of user's manual adjustment display device, and same signal source can use algorithm two to revise at the luminance parameter M of other display time interval:
M '
I, c=(1-α) * M
I, c+ α * M
Set* w ... algorithm two
M
I, cBe the original luminance parameter of signal source i at display time interval c, M '
I, cFor signal source i at the revised luminance parameter of display time interval c, w is a weight coefficient.Continue above-mentioned example; The user is manual adjustment display device 2 brightness to 0.7 4 thirty in the afternoon; And α is set at 0.7; Weight coefficient w then is set at the original brightness parameter of other display time interval and the ratio (w=M/m) of the original brightness parameter of 15 o'clock to 18 o'clock period, and other display time interval also calculates revises back luminance parameter, M '
0,2=0.3 * 0.8+0.7 * 0.7 * (0.8/0.6)=0.89, M '
0,6=0.3 * 0.4+0.7 * 0.7 * (0.4/0.6)=0.44, shown in table three:
Table three
Wherein, the w definition is not limited to above-mentioned definition of giving an example.
(3) if behind user's switching signal source; For example switch to signal source j from signal source i, and in Preset Time during the brightness of user's manual adjustment display device 2, outside the original luminance parameter of expression signal source j is not good; The also possible eyes of user have been accustomed to the brightness of signal source i; So therefore the brightness settings of uncomfortable signal source j, can adjust the luminance parameter of signal source j according to algorithm three for the moment
M
J, c'=(1-α) * M
J, c+ α * M
I, c* w ... algorithm three
M is original luminance parameter, and M ' is revised luminance parameter, and c is a display time interval, and w is a weight coefficient, and α is the adjustment coefficient.W and α can be set by system designer.
For example the user in the afternoon 2 switch to from the video-audio signal source that to revise backlight illumination in 2 minutes behind the TV signal source be 0.9, and α is defined as 0.7, w is defined as M
Set/ M
I, c=0.9/0.7=1.29, then M '
0,2=0.3 * 0.8+0.7 * 0.7 * 1.29=0.87, and M '
0,0=0.3 * 0.6+0.7 * 0.5 * 1.29=0.63, and M
0,6=0.3 * 0.4+0.7 * 0.3 * 1.29=0.39, amended data are shown in table four
Table four
Wherein, the w definition is not limited to above-mentioned definition of giving an example.
(4) if the brightness of user's adjustment display device in display time interval changes the back Preset Time; The light source of then representing user's environment of living in changes different with the preset variation of the table of comparisons; With table one is example; The preset situation of table one be at 3 in afternoon later surround lighting can die down, so display time interval 3 luminance parameters to 6 pm in afternoon are set at 0.6, are lower than at 12 in display time interval afternoon to 3 luminance parameter in afternoon.Therefore,
Brightness to 0.7 of the TV signal source of manual adjustment display device 2 after for example it's at 3 in afternoon has past the user, and α is set at 0.7, then M '
0,3=0.3 * 0.6+0.7 * 0.7 * 1=0.67
Table five
(5) as if user's brightness of a signal source adjustment display device therein, and can use above-mentioned algorithm one to calculate source current signal i luminance parameter after the modification of present display time interval, and use algorithm five to revise the luminance parameter of other signal source j,
M
J, c'=(1-α) * M
J, c+ α * M
J, c* (M
Set/ M
I, c) ... algorithm five
M
J, cFor signal source j at the original luminance parameter of display time interval c, M '
J, cBe the luminance parameter that signal source j revises at display time interval c, M
I, cFor signal source i at the original luminance parameter of display time interval c, M
SetFor the user at the luminance parameter of signal source i after display time interval c manual adjustment.For example the user in the afternoon 2 backlight illuminations of revising TV signal sources be 0.9, M ' then
0,2=0.8 * 0.3+0.9 * 0.7=0.87, and M '
1,2=0.7 * 0.3+0.7 * 0.7 * (0.9/0.8)=0.76, M '
2,2=0.9 * 0.3+0.9 * 0.7 * (0.9/0.8)=0.97.
Table six
More than for example and algorithm be merely for example, but not as limit, everyly can revise the table of comparisons, and further revise the luminance parameter of other period in the table of comparisons or other signal source, all in protection scope of the present invention according to the luminance parameter of user's manual adjustment.In addition, above-mentioned five kinds of modes optionally also can merge use except independent use.
Fig. 3 is the flow chart of steps of first embodiment of method for controlling display brightness provided by the present invention.Among the figure, this method is used for receiving the display device of a plurality of signal sources, comprises the following step.Obtain the current time and judge the signal source of current demonstration in step 31.Distinguish the table of comparisons of corresponding luminance parameter from writing down a plurality of signal sources and a plurality of display time interval in step 32, find the luminance parameter of the signal source of corresponding current time and current demonstration.Control the brightness of display device according to the luminance parameter of finding in step 33.Step 34 when the user adjusts the brightness of display device, is revised the luminance parameter of the signal source of corresponding current time of institute and current demonstration in the table of comparisons according to adjustment result and algorithm, and is of the content of above-mentioned mode (1), with the manual luminance parameter M of setting of user
SetAnd algorithm one: M '=(1-α) * M+ α * M
SetCalculate the luminance parameter M ' of modification on their own, and α can be set up by the user, its result is shown in table two.
In addition, said first embodiment optionally also can comprise the luminance parameter of revising corresponding current time of institute and other signal source in this table of comparisons according to adjustment result and another algorithm, and is of the content of above-mentioned mode (5), with the manual luminance parameter M of setting of user
Set, signal source i and the original luminance parameter M of signal source j
I, cAnd M
J, c, and algorithm five: M
J, c'=(1-α) * M
J, c+ α * M
J, c* (M
Set/ M
I, c) calculate, and α can be set up on their own by the user, its result is shown in table six.
In addition; Said first embodiment optionally also can comprise according to adjustment result and another algorithm revise in this table of comparisons signal source and the luminance parameter of other time of corresponding current demonstration; Content like above-mentioned mode (2) is said, with the manual luminance parameter M that sets of user
Set, the original luminance parameter M of signal source i
I, c, and algorithm two: M '
I, c=(1-α) * M
I, c+ α * M
Set* w calculates, and α and w can be set up on their own by the user, and its result is shown in table three.
Fig. 4 is the flow chart of steps of second embodiment of method for controlling display brightness provided by the present invention.Among the figure, this method is used for receiving the display device of a plurality of signal sources, comprises the following step.Obtain the current time and judge the signal source of current demonstration in step 41.Distinguish the table of comparisons of corresponding luminance parameter from writing down a plurality of signal sources and a plurality of display time interval in step 42, find the luminance parameter of the signal source of corresponding current time and current demonstration.Control the brightness of display device according to the luminance parameter of finding in step 43.Step 44; When the user adjusts the brightness of display device; Judge whether that the user has switching signal source before Preset Time, if then revise the luminance parameter of the signal source of at least one display time interval and current demonstration in the table of comparisons according to adjustment result, the original luminance parameter of algorithm and unlike signal source in step 45; Of above-mentioned mode (3), with the manual luminance parameter M that sets of user
Set, signal source i and signal source j original luminance parameter M
I, cAnd M
J, c, algorithm three M
J, c'=(1-α) * M
J, c+ α * M
I, c* M
Set/ M
I, cCalculate, and α can be set up on their own by the user, its result is shown in table four.
If the user does not have switching signal source before Preset Time; Then judge the display time interval that whether the conversion table of comparisons is write down before Preset Time in step 46; If; Then revise in the table of comparisons luminance parameter of the signal source of corresponding current time of institute and current demonstration according to the original luminance parameter of adjustment result, another algorithm and former and later two display time intervals in step 47, of above-mentioned mode (4), with the manual luminance parameter M of setting of user
Set, signal source i original luminance parameter M
I, c, the last period original luminance parameter M
I, c-1And algorithm four
Calculate, and α can be set up on their own by the user, its result is shown in table five.
If before Preset Time, there is not the display time interval that the conversion table of comparisons is write down; Then revise the luminance parameter of the signal source of institute's correspondence current time and current demonstration in the table of comparisons according to adjustment result and another algorithm in step 48; Of above-mentioned mode (1), with the manual luminance parameter M that sets of user
SetAnd algorithm one: M '=(1-α) * M+ α * M
SetCalculate the luminance parameter M ' of modification on their own, and α can be set up by the user, its result is shown in table two.
More than reaching algorithm for example is merely for example; But not as limit; Everyly can revise the table of comparisons, and further revise the method for the luminance parameter of other period in the table of comparisons or other signal source, all belong in protection scope of the present invention according to the luminance parameter of user's manual adjustment.In addition, above-mentioned five kinds of modes optionally also can merge use except independent use.
The above is merely illustrative, and non-limiting.Any spirit of the present invention and category of not breaking away to its equivalent modifications of carrying out or change, all should be included in the claims.
Claims (14)
1. display device, it comprises: signal receiving module, to be used to receive signal of video signal from a plurality of signal sources; Timing module is to be used to provide the current time; Storage module, to be used to store first algorithm and the table of comparisons, this table of comparisons is that a plurality of signal sources of record and a plurality of display time interval are distinguished corresponding luminance parameter; Display module is to be used for show image; Operational module to be used to supply user's switching signal source, with the signal source of definite current demonstration, and supplies the user to adjust the brightness of said display module; And processing module; To be used to handling signal of video signal to produce image data; And control said display module and show said image data; And from the said table of comparisons, find the luminance parameter of the signal source of corresponding said current time and said current demonstration, and control the brightness of said display module according to the said luminance parameter of finding;
Wherein, after the user adjusted the brightness of said display module, said processing module was revised each display time interval that the said table of comparisons writes down and at least one corresponding luminance parameter of signal source of said current demonstration according to adjustment result and said first algorithm.
2. display device according to claim 1; It is characterized in that said storage module also stores second algorithm; And when after the user is switched said signal source, in Preset Time, adjusting the brightness of said display module, said processing module is revised each display time interval and at least one corresponding luminance parameter of the signal source after the said switching that the said table of comparisons writes down according to the luminance parameter of the preceding signal source of said adjustment result, said second algorithm and switching.
3. display device according to claim 2 is characterized in that the luminance parameter of the signal source before said processing module is according to adjustment result, said second algorithm and switching is revised the signal source after the switching described in the said table of comparisons at whole pairing luminance parameters of period.
4. display device according to claim 1; It is characterized in that said storage module also stores algorithm; And when the brightness of user's said display module of adjustment in said display time interval changes the back Preset Time, said processing module is revised each display time interval that the said table of comparisons writes down and at least one corresponding luminance parameter of signal source of said current demonstration according to adjustment result and said algorithm.
5. display device according to claim 1 is characterized in that said processing module revises each display time interval of the signal source that the said table of comparisons writes down and at least one corresponding luminance parameter of signal source of said current demonstration according to adjustment result and the 4th algorithm.
6. display device according to claim 1 is characterized in that said display module comprises light-emitting device, and said processing module is controlled the driving voltage of said light-emitting device to change the brightness of said display module.
7. display device according to claim 1 is characterized in that said signal source comprises TV signal source, video-audio signal source or computer signalling source.
8. method for controlling display brightness is used for receiving the display device of a plurality of signal sources, and this method for controlling display brightness comprises the following step:
Obtain the current time and judge the signal source of current demonstration;
Distinguish the table of comparisons of corresponding luminance parameter from writing down a plurality of signal sources and a plurality of display time interval, find the luminance parameter of the signal source of corresponding current time and current demonstration;
Control the brightness of said display device according to the said luminance parameter of finding; And
When the user adjusts the brightness of said display device, revise each display time interval that the said table of comparisons writes down and at least one corresponding luminance parameter of signal source of said current demonstration according to adjustment result and first algorithm.
9. method for controlling display brightness according to claim 8 is characterized in that also comprising:
When after the user is switched said signal source, in Preset Time, adjusting the brightness of said display device, revise each display time interval and at least one corresponding luminance parameter of the signal source after the said switching that the said table of comparisons writes down according to the adjustment result and second algorithm.
10. method for controlling display brightness according to claim 9 is characterized in that also comprising:
The signal source of revising current demonstration described in the said table of comparisons according to said adjustment result and said second algorithm is at whole pairing luminance parameters of period.
11. method for controlling display brightness according to claim 8 is characterized in that also comprising:
When the brightness of user's said display device of adjustment in said display time interval changes the back Preset Time, revise each display time interval that the said table of comparisons writes down and at least one corresponding luminance parameter of signal source of said current demonstration according to adjustment result and algorithm.
12. method for controlling display brightness according to claim 8 is characterized in that also comprising:
When the user adjusts the brightness of said display device, revise each display time interval of the said signal source that the said table of comparisons writes down and at least one corresponding luminance parameter of signal source of said current demonstration according to adjustment result and the 4th algorithm.
13. method for controlling display brightness according to claim 8 is characterized in that said display device also comprises light-emitting device, and the step of controlling the brightness of said display device is to realize with the driving voltage of controlling said light-emitting device.
14. method for controlling display brightness according to claim 8 is characterized in that said signal source comprises TV signal source, video-audio signal source or computer signalling source.
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| EP1686777A1 (en) * | 2005-01-31 | 2006-08-02 | Research In Motion Limited | Method for and mobile device having a geographical postion and ambient dependent backlight of a display |
| CN1855206A (en) * | 2005-04-26 | 2006-11-01 | 佛山市顺德区顺达电脑厂有限公司 | Method for adjusting display device brightness automatically |
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| CN101650931A (en) | 2010-02-17 |
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