CN102903337B - 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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- CN102903337B CN102903337B CN201210356935.4A CN201210356935A CN102903337B CN 102903337 B CN102903337 B CN 102903337B CN 201210356935 A CN201210356935 A CN 201210356935A CN 102903337 B CN102903337 B CN 102903337B
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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 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, for the demand of saving the energy, also increasingly come into one's own.The liquid crystal display of commonly using in daily life is passive luminescent device, by display module, is that LCDs and backlight module form, 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, picture in liquid crystal display stops after 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 conventionally, will be not as expected 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 to guarantee that under the prerequisite of liquid crystal display display effect, the power consumption that as far as possible reduces 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 present invention provides a kind of control method, device and liquid crystal display of liquid crystal display, in order to realize, is guaranteeing, under the prerequisite of liquid crystal display display effect, to reduce the power consumption of backlight module as far as possible.
The control method of a kind of liquid crystal display that the embodiment of the present invention provides, comprising:
The working current of display module in detection LCD monitor;
According to the working current of the display module detecting and the working current of display module of setting up in advance and the corresponding relation between the drive current of backlight module, regulate the drive current of backlight module in described liquid crystal display.
The control device of a kind of liquid crystal display that the embodiment of the present invention provides, comprising:
Detection module, for detection of the working current of display module in liquid crystal display;
Adjustment module, for according to the working current of the display module detecting and the working current of display module of setting up in advance and the corresponding relation between the drive current of backlight module, regulates the drive current of backlight module in described liquid crystal display.
A kind of liquid crystal display that the embodiment of the present invention provides, comprises the control device of the above-mentioned liquid crystal display that the embodiment of the present invention provides.
The beneficial effect of the embodiment of the present invention comprises:
The control method of a kind of liquid crystal display that the embodiment of the present invention provides, device and liquid crystal display, because the display module in liquid crystal display is when showing the picture of low-light level, reduce the backlight illumination that backlight module sends, and 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 the picture brightness showing according to the working current of detection display module like this.Therefore, in the control method of the liquid crystal display providing in the embodiment of the present invention, according to above-mentioned principle, set up in advance the corresponding relation between the working current of display module and the drive current of backlight module, afterwards, according to the working current of the display module detecting, regulate the drive current of backlight module, during with picture showing compared with low-light level, reduce backlight module and send backlight illumination, reach and guaranteeing under the prerequisite of display effect, the power consumption that reduces backlight module carrys out the effect of energy saving.
Accompanying drawing explanation
The schematic flow sheet of the control method of the liquid crystal display that Fig. 1 provides for the embodiment of the present invention;
The principle schematic of the liquid crystal display that Fig. 2 a and Fig. 2 b provide for the embodiment of the present invention;
The structural representation of the control device of the liquid crystal display that Fig. 3 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the control method of the liquid crystal display that the embodiment of the present invention is provided, device and liquid crystal display is described in detail.
Present inventor finds, when liquid crystal display display frame, if being low-light level, most of region of picture shows, 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, display effect by the different backlight illuminations that relatively backlight module sends is 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, inventor expects can be when display module shows the lower picture of this mean flow rate, reduce its brightness backlight, to reduce the power consumption of backlight module, and can not affect display effect.
And, known according to the principle of work of liquid crystal display, 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 the display module of normal black pattern from the picture of low-light level to the process of the picture of high brightness, its power consumption progressively increases, the working current of display module progressively increases.At this, only take normal white mode display module is example, test data as shown in table 1, and when LCD MODULE shows that the picture of maximum brightness is white picture, power consumption is minimum, and when the picture that shows minimum brightness is black picture, power consumption is maximum.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 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 present invention provides, as shown in Figure 1, specifically comprises the following steps:
The working current of display module in S101, detection LCD monitor;
The working current of the display module that S102, basis detect and the working current of display module of setting up in advance and the corresponding relation between the drive current of backlight module, the drive current of backlight module in adjustable liquid crystal display display.
Wherein, set up in advance the corresponding relation between the working current of display module and the drive current of backlight module, specifically comprise following step:
First, measure respectively the working current of display module when showing the picture of different brightness, set up the corresponding relation between picture brightness and the working current of display module; In the specific implementation, if this liquid crystal display applications is when the little displayed scene of the image information amounts such as medical treatment or Industry Control, can measure the working current of display module when display white picture, black picture and some exemplary picture.
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 picture brightness and the drive current of backlight module; In the specific implementation, the drive current of general backlight module is all fixed value, 200mA for example, can on the basis of 200mA, reduce 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, finally forms the corresponding relation of the required minimum drive current of different pictures brightness and backlight module.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, can be also the driving current value slightly larger than this minimum drive current, at this, does not limit.
Finally, according to the corresponding relation between picture brightness and the working current of display module, and the corresponding relation between picture brightness and the drive current of backlight module, obtain the corresponding relation between the working current of display module and the drive current of 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
In the specific implementation, generally the corresponding relation between the working current of the display module obtaining according to said process and the drive current of backlight module can be stored in the microprocessor (MCU) of liquid crystal display, so that subsequent operation is searched, call.
Particularly, generally by hardware detection, arrive after the working current of display module, need to be by it after the conversion of A/D converter, as shown in Figure 2 a and 2 b, by searching the corresponding relation between the working current of display module and the drive current of backlight module, determine the drive current that backlight module is required, and by adjusting driver, be input to pulse-length modulation (PWM) signal of backlight module, regulate the drive current of backlight module.Wherein, as shown in Figure 2 a, A/D converter can be arranged on MCU outside, also can be arranged on as shown in Figure 2 b MCU inside, at this, does not limit.
Further, for fear of the drive current that regulates too frequently backlight module, the above-mentioned control method that the embodiment of the present invention provides, in step S101 detection LCD monitor after the working current of display module, in step S102 adjustable liquid crystal display display, before the drive current of backlight module, can also comprise:
Whether the working current of determining the display module detecting is greater than predetermined current value, and if so, the drive current of backlight module in 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 display white picture, and is less than the working current while showing black picture, in the specific implementation, can be set to the mean value of both working currents, at this, is not specifically limited.
Based on same inventive concept, the embodiment of the present invention also provides a kind of control device Apparatus and system of liquid crystal display, because the principle that this device is dealt with problems 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 present invention provides, as shown in Figure 3, comprising:
Detection module 01, for detection of the working current of display module in liquid crystal display;
Adjustment module 02, for according to the working current of the display module detecting and the working current of display module of setting up in advance and the corresponding relation between the drive current of backlight module, regulates the drive current of backlight module in described liquid crystal display.
Further, the above-mentioned liquid crystal display that the embodiment of the present invention provides, as shown in Figure 3, also comprises:
Determination module 03, for determining whether the working current of the display module that detection module 01 detects is greater than predetermined current value, and if so, the drive current of backlight module in adjustment module 02 adjustable liquid crystal display display, if not, keeps the drive current of former backlight module.
Further, the above-mentioned liquid crystal display that the embodiment of the present invention provides, as shown in Figure 3, also comprise: memory module 04, for storing the corresponding relation of setting up in advance between the working current of display module and the drive current of 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 picture brightness and the working current of 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 picture brightness and the drive current of backlight module; According to the corresponding relation between picture brightness and the working current of display module, and the corresponding relation between picture brightness and the drive current of backlight module, the corresponding relation between the working current of display module and the drive current of backlight module obtained.
Further, above-mentioned adjustment module 02, specifically for be input to the pulse width modulation (PWM) signal of backlight module by adjusting driver, regulates the drive current of backlight module.
The embodiment of the present 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 present invention provides.
Through the above description of the embodiments, those skilled in the art can be well understood to the embodiment of the present invention and can realize by hardware, and the mode that also can add necessary general hardware platform by software realizes.Understanding based on such, the technical scheme of the embodiment of the present 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, or the network equipment etc.) carry out the method described in each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in 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 in embodiment can be distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from the 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, just to describing, does not represent the quality of embodiment.
The control method of a kind of liquid crystal display that the embodiment of the present invention provides, device and liquid crystal display, because the display module in liquid crystal display is when showing the picture of low-light level, reduce the backlight illumination that backlight module sends, and 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 the picture brightness showing according to the working current of detection display module like this.Therefore, in the control method of the liquid crystal display providing in the embodiment of the present invention, according to above-mentioned principle, set up in advance the corresponding relation between the working current of display module and the drive current of backlight module, afterwards, according to the working current of the display module detecting, regulate the drive current of backlight module, during with picture showing compared with low-light level, reduce backlight module and send backlight illumination, reach and guaranteeing under the prerequisite of display effect, the power consumption that reduces backlight module carrys out the effect of energy saving.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (7)
1. a control method for liquid crystal display, is characterized in that, comprising:
The working current of display module in detection LCD monitor;
According to the working current of the display module detecting and the working current of display module of setting up in advance and the corresponding relation between the drive current of backlight module, regulate the drive current of backlight module in described liquid crystal display;
The described corresponding relation of setting up in advance between the working current of described display module and the drive current of 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 picture brightness and the working current of 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 picture brightness and the drive current of backlight module;
According to the corresponding relation between picture brightness and the working current of display module, and the corresponding relation between picture brightness and the drive current of backlight module, the corresponding relation between the working current of display module and the drive current of backlight module obtained.
2. control method as claimed in claim 1, is characterized in that, in detection LCD monitor, after the working current of display module, before regulating the drive current of backlight module in described liquid crystal display, also comprises:
Whether the working current of determining the display module detecting is greater than predetermined current value, if so, regulates the drive current of backlight module in described liquid crystal display, if not, keeps the drive current of former backlight module.
3. control method as claimed in claim 1 or 2, is characterized in that, regulates the drive current of backlight module in described liquid crystal display, specifically comprises:
By adjusting driver, be input to the pulse width modulation (PWM) signal of backlight module, regulate the drive current of backlight module.
4. a control device for liquid crystal display, is characterized in that, comprising:
Detection module, for detection of the working current of display module in liquid crystal display;
Adjustment module, for according to the working current of the display module detecting and the working current of display module of setting up in advance and the corresponding relation between the drive current of backlight module, regulates the drive current of backlight module in described liquid crystal display;
Memory module, for storing the corresponding relation of setting up in advance between the working current of described display module and the drive current of backlight module;
Described 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 picture brightness and the working current of 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 picture brightness and the drive current of backlight module;
According to the corresponding relation between picture brightness and the working current of display module, and the corresponding relation between picture brightness and the drive current of backlight module, the corresponding relation between the working current of display module and the drive current of backlight module obtained.
5. control device as claimed in claim 4, is characterized in that, also comprises:
Determination module, for determining whether the working current of the display module that described detection module detects is greater than predetermined current value, and if so, described adjustment module regulates the drive current of backlight module in described liquid crystal display, if not, the drive current that keeps former backlight module.
6. the control device as described in claim 4 or 5, is characterized in that, described adjustment module, specifically for be input to the pulse width modulation (PWM) signal of backlight module by adjusting driver, regulates the drive current of backlight module.
7. a liquid crystal display, is characterized in that, comprises the control device of the liquid crystal display as described in claim 4-6 any one.
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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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| CN105096788B (en) * | 2015-09-24 | 2017-11-10 | 维沃移动通信有限公司 | The power consumption detection method and device of 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 |
| CN106658691B (en) | 2017-03-10 | 2020-01-14 | Oppo广东移动通信有限公司 | Display control method and device and mobile terminal |
| CN107342058B (en) * | 2017-08-30 | 2020-04-14 | 创维液晶器件(深圳)有限公司 | Method, test board, system and equipment for adjusting brightness of liquid crystal display module |
| 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 |
| TWI699606B (en) * | 2019-01-17 | 2020-07-21 | 友達光電股份有限公司 | Signal processing method and display device |
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| CN1987964A (en) * | 2005-12-25 | 2007-06-27 | 群康科技(深圳)有限公司 | Display device and its control method |
| CN201382850Y (en) * | 2009-03-24 | 2010-01-13 | Tcl集团股份有限公司 | Test device for liquid crystal display module |
| CN101770089A (en) * | 2008-12-26 | 2010-07-07 | 京东方科技集团股份有限公司 | Liquid crystal display module tester |
| CN202171929U (en) * | 2011-05-31 | 2012-03-21 | 贺术春 | LCM module group test system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101279892B1 (en) * | 2008-06-10 | 2013-06-28 | 엘지디스플레이 주식회사 | Testing apparatus of liquid crystal display module |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1987964A (en) * | 2005-12-25 | 2007-06-27 | 群康科技(深圳)有限公司 | Display device and its control method |
| CN101770089A (en) * | 2008-12-26 | 2010-07-07 | 京东方科技集团股份有限公司 | Liquid crystal display module tester |
| CN201382850Y (en) * | 2009-03-24 | 2010-01-13 | Tcl集团股份有限公司 | Test device for liquid crystal display module |
| CN202171929U (en) * | 2011-05-31 | 2012-03-21 | 贺术春 | LCM module group test system |
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