CN102903337A - Liquid crystal display as well as control method and device thereof - Google Patents
Liquid crystal display as well as control method and device thereof Download PDFInfo
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- CN102903337A CN102903337A CN2012103569354A CN201210356935A CN102903337A CN 102903337 A CN102903337 A CN 102903337A CN 2012103569354 A CN2012103569354 A CN 2012103569354A CN 201210356935 A CN201210356935 A CN 201210356935A CN 102903337 A CN102903337 A CN 102903337A
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Abstract
The invention discloses a liquid crystal display as well as a control method and device thereof. When a display module in the liquid crystal display displays a low-brightness picture, a display effect of the picture can not be influenced in case of reducing the backlight brightness emitted by the backlight module; and different working currents can be loaded when the display module displays the pictures with different brightness, so that the displayed picture brightness can be determined by detecting the working current of the display module. Therefore, in the control method of the liquid crystal display provided by the embodiment of the invention, the corresponding relationship between the working current of the display module and a driving current of the backlight module is established in advance according to the principle, then the driving current of the backlight module is adjusted according to the detected working current of the display module so as to reduce the backlight brightness emitted by the backlight module when the picture with low brightness is displayed, thus achieving the effects of reducing power consumption of the backlight module and saving electricity on the basis of ensuring the display effect.
Description
Technical field
The present invention relates to the display technique field, relate in particular to a kind of control method, device and liquid crystal display of liquid crystal display.
Background technology
At present, because environmental consciousness is increasingly important, also increasingly come into one's own for the demand of energy savings.The liquid crystal display of commonly using in the daily life is passive luminescent device, is that LCDs and backlight module form by display module, and wherein, the power consumption of backlight module accounts for most of power consumption of whole liquid crystal display.
And existing liquid crystal display generally has the setting of power supply power saving, after the picture of liquid crystal display stops setting-up time, its backlight module and time schedule controller can be closed, but, for fear of directly close display because the picture of short time stops, long that time of display all sets closed in this control usually, then will be not as expecting for the effect of whole saving power supply, and the operation of directly closing display is not suitable for display just in the situation of display frame yet.
Therefore, how under the prerequisite that guarantees the liquid crystal display display effect, the power consumption of reduce backlight module reaches the effect of energy saving, is the technical matters that those skilled in the art need solution badly.
Summary of the invention
The embodiment of the invention provides a kind of control method, device and liquid crystal display of liquid crystal display, in order to be implemented under the prerequisite that guarantees the liquid crystal display display effect power consumption of reduce backlight module.
The control method of a kind of liquid crystal display that the embodiment of the invention provides comprises:
The working current of display module in the detection LCD monitor;
According to the working current of the display module that detects and the corresponding relation between the drive current of the working current of the display module of setting up in advance and backlight module, regulate the drive current of backlight module in the described liquid crystal display.
The control device of a kind of liquid crystal display that the embodiment of the invention provides comprises:
Detection module is for detection of the working current of display module in the liquid crystal display;
Adjustment module is used for regulating the drive current of backlight module in the described liquid crystal display according to the corresponding relation between the drive current of the working current of the working current of the display module that detects and the display module set up in advance and backlight module.
A kind of liquid crystal display that the embodiment of the invention provides comprises the control device of the above-mentioned liquid crystal display that the embodiment of the invention provides.
The beneficial effect of the embodiment of the invention comprises:
The control method of a kind of liquid crystal display that the embodiment of the invention provides, device and liquid crystal display because the display module in the liquid crystal display when showing the picture of low-light level, reduces the backlight illumination that backlight module sends, can not affect the display effect of picture; And display module can load different working currents when showing the picture of different brightness, can determine according to the working current of detection display module like this picture brightness of demonstration.Therefore, in the control method of the liquid crystal display that the embodiment of the invention provides, set up in advance the corresponding relation between the drive current of the working current of display module and backlight module according to above-mentioned principle, afterwards, regulate the drive current of backlight module according to the working current of the display module that detects, with when the picture that shows than low-light level, reduce backlight module and send backlight illumination, reach under the prerequisite that guarantees display effect, the power consumption that reduces backlight module comes the effect of energy saving.
Description of drawings
The schematic flow sheet of the control method of the liquid crystal display that Fig. 1 provides for the embodiment of the invention;
The principle schematic of the liquid crystal display that Fig. 2 a and Fig. 2 b provide for the embodiment of the invention;
The structural representation of the control device of the liquid crystal display that Fig. 3 provides for the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of control method, device and the liquid crystal display of the liquid crystal display that the embodiment of the invention is provided is described in detail.
The present inventor finds, when liquid crystal display display frame, if most of zone of picture shows for low-light level, for example picture is for showing a handle double-edged sword, its background is black, double-edged sword shared ratio in whole display frame is less, we can think that this picture mean flow rate is lower so, at this moment, the display effect of the different backlight illuminations that send by backlight module relatively as can be known, beholder's eyes are the not larger difference of its picture effect when perception high brightness backlights and low-light level picture backlight, therefore, the inventor expects and can when display module shows the lower picture of this mean flow rate, reduce its brightness backlight, with the power consumption of reduction backlight module, and can not affect display effect.
And, according to the principle of work of liquid crystal display as can be known, the display module of normal white mode from the picture of high brightness to the process of the picture of low-light level, its power consumption progressively increases, the working current that is display module progressively increases, and often the display module of black pattern from the picture of low-light level to the process of the picture of high brightness, its power consumption progressively increases, namely the working current of display module progressively increases.At this only take normal white mode display module as example, test data as shown in table 1, power consumption is minimum when LCD MODULE shows that the picture of maximum brightness is white picture, power consumption is maximum when the picture that shows minimum brightness is the black picture.Like this, we can calculate its power consumption size by the working current size of detection display module, thereby determine the brightness size of the picture that current display module shows.
The power consumption data of LCD MODULE (LCM) in the table 16 cun liquid crystal display
Therefore, according to above-mentioned analysis, the control method of a kind of liquid crystal display that the embodiment of the invention provides as shown in Figure 1, specifically may further comprise the steps:
The working current of display module in S101, the detection LCD monitor;
Corresponding relation between the working current of the working current of the display module that S102, basis detect and the display module of setting up in advance and the drive current of backlight module, the drive current of backlight module in the adjustable liquid crystal display display.
Wherein, set up in advance the corresponding relation between the drive current of the working current of display module and backlight module, specifically comprise following step:
At first, measure respectively the working current of display module when showing the picture of different brightness, set up the corresponding relation between the working current of picture brightness and display module; In the specific implementation, if this liquid crystal display applications can be measured the working current of display module when display white picture, black picture and some exemplary picture when the little displayed scene of the image information amounts such as medical treatment or Industry Control.
Then, for the picture of different brightness, determine the minimum drive current of the backlight module that it is required, set up the corresponding relation between the drive current of picture brightness and backlight module; In the specific implementation, the drive current of general backlight module all is fixed value, 200mA for example, can reduce on the basis of 200mA the drive current of backlight module, be recorded in the situation that does not affect beholder's perception, the maximum that its drive current of the picture of this brightness reduces on the basis of 200mA forms the corresponding relation of the required minimum drive current of different pictures brightness and backlight module at last.Certainly, in order to guarantee better viewing effect, the required drive current of the backlight module corresponding with different pictures brightness can be above-mentioned minimum drive current, also can be the driving current value slightly larger than this minimum drive current, does not do restriction at this.
At last, according to the corresponding relation between the working current of picture brightness and display module, and the corresponding relation between the drive current of picture brightness and backlight module, obtain the corresponding relation between the drive current of the working current of display module and backlight module, for example mapping table as shown in table 2.
Mapping table between the working current of table 2 display module and the drive current of backlight module
| Working current | 14.32mA | 16.10mA | 19.82mA | 23.00mA | 25.82mA |
| Drive current | 200mA | 175mA | 150mA | 125mA | 100mA |
In the specific implementation, generally the corresponding relation between the drive current of the working current of the display module that obtains according to said process and backlight module can be stored in the microprocessor (MCU) of liquid crystal display, call so that subsequent operation is searched.
Particularly, generally after arriving the working current of display module by hardware detection, need to be with it through after the conversion of A/D converter, shown in Fig. 2 a and Fig. 2 b, corresponding relation between working current by searching display module and the drive current of backlight module, determine the drive current that backlight module is required, and be input to pulse-length modulation (PWM) signal of backlight module by adjusting driver, regulate the drive current of backlight module.Wherein, shown in Fig. 2 a, A/D converter can be arranged on the MCU outside, also can be arranged on MCU inside shown in Fig. 2 b, does not do restriction at this.
Further, for fear of the drive current of regulating too frequently backlight module, the above-mentioned control method that the embodiment of the invention provides, in step S101 detection LCD monitor after the working current of display module, before the drive current of backlight module, can also comprise in the step S102 adjustable liquid crystal display display:
Determine that whether the working current of the display module that detects is greater than the predetermined current value, if the drive current of backlight module in the adjustable liquid crystal display display if not, keeps the drive current of former backlight module.
Wherein, this predetermined current value can be greater than the working current of display module when the display white picture, and the working current when showing the black picture, in the specific implementation, can be set to the mean value of both working currents, is not specifically limited at this.
Based on same inventive concept, the embodiment of the invention also provides a kind of control device Apparatus and system of liquid crystal display, because the principle of this device solves problem is similar to the control method of aforementioned a kind of liquid crystal display, therefore the enforcement of this device can referring to the enforcement of method, repeat part and repeat no more.
The control device of a kind of liquid crystal display that the embodiment of the invention provides as shown in Figure 3, comprising:
Further, the above-mentioned liquid crystal display that the embodiment of the invention provides as shown in Figure 3, also comprises:
Further, the above-mentioned liquid crystal display that the embodiment of the invention provides, as shown in Figure 3, also comprise: memory module 04, be used for storage and set up in advance corresponding relation between the drive current of the working current of display module and backlight module, this corresponding relation obtains by following manner: measure respectively the working current of display module when showing the picture of different brightness, set up the corresponding relation between the working current of picture brightness and display module; For the picture of different brightness, determine the minimum drive current of the backlight module that it is required, set up the corresponding relation between the drive current of picture brightness and backlight module; According to the corresponding relation between the working current of picture brightness and display module, and the corresponding relation between the drive current of picture brightness and backlight module, obtain the corresponding relation between the drive current of the working current of display module and backlight module.
Further, above-mentioned adjustment module 02, the concrete pulse width modulation (PWM) signal that is used for being input to by adjusting driver backlight module, the drive current of adjusting backlight module.
The embodiment of the invention also provides a kind of liquid crystal display, comprises the control device of the above-mentioned liquid crystal display that the embodiment of the invention provides.
Through the above description of the embodiments, those skilled in the art can be well understood to the embodiment of the invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, the technical scheme of the embodiment of the invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the synoptic diagram of a preferred embodiment, the module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of above-described embodiment can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number does not represent the quality of embodiment just to description.
The control method of a kind of liquid crystal display that the embodiment of the invention provides, device and liquid crystal display because the display module in the liquid crystal display when showing the picture of low-light level, reduces the backlight illumination that backlight module sends, can not affect the display effect of picture; And display module can load different working currents when showing the picture of different brightness, can determine according to the working current of detection display module like this picture brightness of demonstration.Therefore, in the control method of the liquid crystal display that the embodiment of the invention provides, set up in advance the corresponding relation between the drive current of the working current of display module and backlight module according to above-mentioned principle, afterwards, regulate the drive current of backlight module according to the working current of the display module that detects, with when the picture that shows than low-light level, reduce backlight module and send backlight illumination, reach under the prerequisite that guarantees display effect, the power consumption that reduces backlight module comes the effect of energy saving.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (9)
1. the control method of a liquid crystal display is characterized in that, comprising:
The working current of display module in the detection LCD monitor;
According to the working current of the display module that detects and the corresponding relation between the drive current of the working current of the display module of setting up in advance and backlight module, regulate the drive current of backlight module in the described liquid crystal display.
2. control method as claimed in claim 1 is characterized in that, after the working current of display module, regulates before the drive current of backlight module in the described liquid crystal display in detection LCD monitor, also comprises:
Whether determine the working current of the display module that detects greater than the predetermined current value, if, regulate the drive current of backlight module in the described liquid crystal display, if not, keep the drive current of former backlight module.
3. control method as claimed in claim 1 is characterized in that, sets up in advance the corresponding relation between the drive current of the working current of described display module and backlight module, specifically comprises:
Measure respectively the working current of display module when showing the picture of different brightness, set up the corresponding relation between the working current of picture brightness and display module;
For the picture of different brightness, determine the minimum drive current of the backlight module that it is required, set up the corresponding relation between the drive current of picture brightness and backlight module;
According to the corresponding relation between the working current of picture brightness and display module, and the corresponding relation between the drive current of picture brightness and backlight module, obtain the corresponding relation between the drive current of the working current of display module and backlight module.
4. such as each described control method of claim 1-3, it is characterized in that, regulate the drive current of backlight module in the described liquid crystal display, specifically comprise:
Be input to the pulse width modulation (PWM) signal of backlight module by adjusting driver, regulate the drive current of backlight module.
5. the control device of a liquid crystal display is characterized in that, comprising:
Detection module is for detection of the working current of display module in the liquid crystal display;
Adjustment module is used for regulating the drive current of backlight module in the described liquid crystal display according to the corresponding relation between the drive current of the working current of the working current of the display module that detects and the display module set up in advance and backlight module.
6. control device as claimed in claim 5 is characterized in that, also comprises:
Determination module, be used for to determine that whether the working current of the display module that described detection module detects is greater than the predetermined current value, if described adjustment module is regulated the drive current of backlight module in the described liquid crystal display, if not, the drive current that keeps former backlight module.
7. control device as claimed in claim 5, it is characterized in that, also comprise: memory module, be used for storage and set up in advance corresponding relation between the drive current of the working current of described display module and backlight module, this corresponding relation obtains by following manner: measure respectively the working current of display module when showing the picture of different brightness, set up the corresponding relation between the working current of picture brightness and display module; For the picture of different brightness, determine the minimum drive current of the backlight module that it is required, set up the corresponding relation between the drive current of picture brightness and backlight module; According to the corresponding relation between the working current of picture brightness and display module, and the corresponding relation between the drive current of picture brightness and backlight module, obtain the corresponding relation between the drive current of the working current of display module and backlight module.
8. such as each described control device of claim 5-7, it is characterized in that described adjustment module, the concrete pulse width modulation (PWM) signal that is used for being input to by adjusting driver backlight module, the drive current of adjusting backlight module.
9. a liquid crystal display is characterized in that, comprises the control device such as each described liquid crystal display of claim 5-8.
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| CN201210356935.4A CN102903337B (en) | 2012-09-21 | 2012-09-21 | Liquid crystal display as well as control method and device thereof |
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| CN201210356935.4A CN102903337B (en) | 2012-09-21 | 2012-09-21 | Liquid crystal display as well as control method and device thereof |
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Cited By (6)
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| CN105096788A (en) * | 2015-09-24 | 2015-11-25 | 维沃移动通信有限公司 | Electric power consumption detection method and electric power consumption detection device for OLED display screen |
| CN105427815A (en) * | 2016-01-12 | 2016-03-23 | 浙江德景电子科技有限公司 | Method and apparatus for adjusting backlight brightness |
| CN107342058A (en) * | 2017-08-30 | 2017-11-10 | 创维液晶器件(深圳)有限公司 | Liquid crystal display die set brightness adjusting method, test board, system and equipment |
| WO2018161521A1 (en) * | 2017-03-10 | 2018-09-13 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method for controlling image display and terminal |
| CN109346016A (en) * | 2018-11-29 | 2019-02-15 | 厦门天马微电子有限公司 | Backing structure, the brightness adjusting method of backing structure and display device |
| CN110444169A (en) * | 2019-01-17 | 2019-11-12 | 友达光电股份有限公司 | Signal processing method and display device |
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| CN105096788A (en) * | 2015-09-24 | 2015-11-25 | 维沃移动通信有限公司 | Electric power consumption detection method and electric power consumption detection device for OLED display screen |
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| CN110444169A (en) * | 2019-01-17 | 2019-11-12 | 友达光电股份有限公司 | Signal processing method and display device |
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| CN102903337B (en) | 2014-09-10 |
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