CN105895055B - A kind of screen luminance adjustment method and regulating system, display device - Google Patents
A kind of screen luminance adjustment method and regulating system, display device Download PDFInfo
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Abstract
The invention discloses a kind of screen luminance adjustment method and regulating system, display device.The screen luminance adjustment method and regulating system, display device are preset with the comfortable ratio region of ambient intensity/backlight light intensity, only when the ratio of extraneous light intensity/backlight light intensity is beyond default comfortable ratio region, backlight illumination can be just modified, can reduce does not have the frequent amendment problem of practical function largely to visual effect, the power consumption of screen is reduced, increases the durability and usage time of battery.
Description
Technical Field
The invention relates to the technical field of screen display, in particular to a screen brightness adjusting method, an adjusting system and a display device.
Background
The screen display effect of mobile terminals such as mobile phones and tablets is closely related to the external light intensity and the backlight light intensity, the content on the display screen of the mobile terminal is difficult to see due to a bright external environment, and a user usually adopts a mode of pressing the mobile terminal close to eyes to solve the problem of unclear seeing; the dark external environment can make the content on the display screen of the mobile terminal quite dazzling, and the situation is often ignored by the user, which causes serious damage to the vision of the user.
The conventional screen brightness adjusting method detects the intensity of external light, calculates the optimal backlight brightness corresponding to the current intensity of the external light, and adjusts the backlight voltage to achieve the purpose of adjusting the backlight brightness. However, when a user uses the mobile terminal, the user often walks to the other side of the room during walking, the light of the user also slightly changes, the actual visual effect of the screen is not affected by the slight light change, but the screen also frequently corrects the slight light change in a backlight mode, so that the defects that the power consumption of the screen is too high and the battery is not durable are caused.
Disclosure of Invention
In order to solve the above-mentioned deficiencies of the prior art, the present invention provides a screen brightness adjusting method, an adjusting system and a display device. The screen brightness adjusting method, the screen brightness adjusting system and the display device can correct the backlight brightness only when the current ratio of the external light intensity/the backlight light intensity exceeds the comfortable ratio area, so that the frequent correction problem without practical effect on the visual effect can be reduced, the power consumption of the screen is reduced, and the durability and the service time of a battery are increased.
The technical problem to be solved by the invention is realized by the following technical scheme:
a screen brightness adjusting method comprises the following steps:
s1: presetting an optimal ratio of external light intensity/backlight light intensity, a down-regulation ratio and an up-regulation ratio thereof;
s2: calculating a comfortable ratio area of the external light intensity/the backlight light intensity;
s3: detecting and obtaining the external light intensity and the backlight light intensity of the screen in the current environment;
s4: calculating to obtain a current ratio of the external light intensity/backlight light intensity of the screen in the current environment;
s5: comparing the current ratio with the comfort ratio region: if the current ratio is in the comfortable ratio area, the brightness of the backlight does not need to be changed; and if the current ratio is not in the comfortable ratio area, adjusting the brightness of the backlight to return the current ratio to the comfortable ratio area.
Further, in the step S5, if the current ratio is not within the comfort ratio region, the current ratio is equal to the preset optimal ratio by adjusting the brightness of the backlight.
Further, in the step S5, the method for adjusting the brightness of the backlight is to adjust the brightness of the backlight by adjusting the current of the backlight.
Further, if the current ratio is greater than the comfort ratio region, the backlight comfort current or the optimal current corresponding to the backlight comfort brightness or the optimal brightness required by returning the current ratio to the comfort ratio region or the optimal ratio is calculated, and the backlight current is increased to the comfort current or the optimal current.
Further, if the current ratio is smaller than the comfort ratio region, the backlight comfort current or the optimal current corresponding to the backlight comfort brightness or the optimal brightness required by returning the current ratio to the comfort ratio region or the optimal ratio is calculated, and the backlight current is reduced to the comfort current or the optimal current.
Further, in the step S1, an adjustment region of the backlight brightness is preset, and in the step S5, if the backlight comfort brightness or the optimal brightness required for returning the current ratio to the comfort ratio region or the optimal ratio exceeds the preset adjustment region of the backlight brightness, a warning signal is sent.
A screen brightness adjustment system comprising:
a first luminance detection unit: the device is used for detecting and obtaining an outside light intensity value;
a second luminance detection unit: the backlight module is used for detecting and obtaining a backlight light intensity value;
a control module: the input end of the backlight module is respectively connected with the output ends of the first brightness detection unit and the second brightness detection unit, and the backlight module is used for calculating and comparing the outside light intensity value and the backlight light intensity value obtained by the detection of the first brightness detection unit and the second brightness detection unit, and outputting adjusting current to backlight.
Further, the control module includes: the device comprises a comparison unit, a calculation unit, a storage unit, a preset unit and a current control unit, wherein the comparison unit is respectively connected with the first brightness detection unit, the second brightness detection unit, the calculation unit, the storage unit, the preset unit and the current control unit; wherein,
a presetting unit: the method is used for presetting an optimal ratio of the external light intensity/the backlight light intensity, a down-regulation ratio and an up-regulation ratio thereof;
a storage unit: the device is used for storing the preset optimal ratio of the external light intensity/the backlight light intensity, the down-regulation ratio and the up-regulation ratio thereof and calculating the calculation result of the unit;
a calculation unit: a comfort ratio region for calculating the external light intensity/backlight light intensity; calculating the current ratio of the external light intensity/the backlight light intensity according to the detection results of the first brightness detection unit and the second brightness detection unit; calculating a backlight comfort current or an optimal current required for adjusting the current ratio to a comfort ratio region or an optimal ratio;
a comparison unit: comparing the current ratio calculated by the calculating unit with a comfort ratio area preset in the storage unit;
a current control unit: and outputting a comfort current or an optimum current to the backlight according to the comparison result of the comparison unit.
Furthermore, the control module further comprises a warning unit, the storage unit is also preset with a regulation area of the backlight current, and if the comfortable current or the optimal current output by the current control unit is not in the regulation area, the warning unit sends a warning signal.
A display device comprises the screen brightness adjusting system.
The invention has the following beneficial effects:
(1) the screen brightness adjusting method and the screen brightness adjusting system and the display device can enable the brightness adjusting range of the backlight to be suitable for people with different light sensitivities and reading habits by presetting the optimal ratio of the external light intensity/the backlight light intensity, the down-regulation proportion and the up-regulation proportion;
(2) the comfort ratio area concept of the external light intensity/the backlight light intensity is introduced, so that a large number of frequent correction problems without actual effect on the visual effect can be reduced, the power consumption of a screen is reduced, and the durability and the service time of a battery are increased;
(3) if the comfortable current or the optimal current required by the backlight exceeds the preset adjusting area of the backlight current, a warning signal is sent to a user, so that the user can be reminded of paying attention to the user, and the bad phenomenon that the backlight is damaged or the current is too low to influence the display effect due to overlarge current after the backlight current is adjusted can be prevented;
(4) the backlight brightness is adjusted by actually measuring the actual brightness of the backlight and only adjusting the backlight current by adopting constant voltage input, and compared with the prior art of calculating the backlight brightness by detecting the backlight voltage and then adjusting the backlight voltage, the backlight brightness adjusting method can prevent the deviation between the detected backlight voltage and the actual brightness caused by backlight aging.
Drawings
FIG. 1 is a flow chart of a method for adjusting screen brightness according to the present invention;
FIG. 2 is a block diagram of a conditioning system provided by the present invention;
FIG. 3 is a graph of backlight current versus backlight intensity for a 17.8V constant voltage backlight.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Example one
As shown in fig. 1, a method for adjusting screen brightness includes the following steps:
s1: presetting an optimal ratio Q of the external light intensity/the backlight light intensity, a down-regulation ratio P1 and an up-regulation ratio P2;
the specific values of the optimal ratio Q, the up-regulation ratio P1 and the down-regulation ratio P2 in this embodiment are set by the user according to the sensitivity of the user to light and the reading habit, and the specific method is as follows: under the environment of any light intensity, a user enables the screen brightness to reach the best eye use habit by adjusting the backlight brightness, and sets the ratio of the external light intensity/the backlight light intensity at the moment as the best ratio Q; the P1 and the P2 can be set according to the habits of the user, the small P1 and the small P2 indicate that the reading quality requirement of the user is high, the backlight brightness needs to be adjusted in real time according to the ambient brightness, and if the large P1 and the large P2 indicate that the reading quality requirement of the user is low, the frequent change of the backlight brightness can be reduced.
S2: calculating a comfortable ratio region [ Q1, Q2] of the external light intensity/the backlight light intensity, wherein Q1= Q (1-P1), Q2= Q (1 + P2);
for example, if the preset optimal ratio Q =5, the down-regulation ratio P1=10%, and the up-regulation ratio P2=20%, the comfort ratio range is [ Q1=5 (1-10%), Q2=5 (1 + 20%) ], and P1 and P2 may be equal.
S3: detecting and obtaining the external light intensity A and the backlight light intensity B of the screen in the current environment;
in this embodiment, the ambient light intensity and the backlight light intensity of the current environment may be detected by the light intensity sensor, or may be detected by any other known method.
Preferably, the backlight light intensity can also be calculated by detecting a backlight current, and the backlight light intensity increases with the increase of the backlight current within a certain range; fig. 3 shows the relationship between the backlight current and the backlight intensity of a 17.8V constant-voltage backlight, wherein the backlight current is shown on the X-axis in mA, and the backlight intensity is shown on the Y-axis in cd/square meter.
S4: calculating to obtain a current ratio M = A/B of the external light intensity/the backlight light intensity of the screen in the current environment;
s5: compare the current ratio M to the comfort ratio region [ Q1, Q2 ]: if the current ratio M is within the comfort ratio region [ Q1, Q2], the brightness of the backlight does not need to be changed; if the current ratio M is not in the comfort ratio region [ Q1, Q2], the current ratio is returned to the comfort ratio region [ Q1, Q2] by adjusting the brightness of the backlight.
The screen brightness adjusting method of the embodiment introduces the concept of the comfortable ratio area of the external light intensity/the backlight light intensity, and only when the current ratio of the external light intensity/the backlight light intensity exceeds the comfortable ratio area, the backlight brightness is adjusted, so that the problem of frequent correction of the backlight brightness caused by walking of a user, small changes of indoor and outdoor light and other reasons in the prior art is solved, the backlight power consumption is reduced, and the cruising ability of the battery is increased on the premise of not influencing the visual effect.
Preferably, in step S5, if the current ratio M is not within the comfort ratio region [ Q1, Q2], the current ratio M is made equal to the preset optimal ratio Q by adjusting the brightness of the backlight.
In step S5, the adjusting the backlight brightness is to adjust the backlight brightness by adjusting the backlight current, and the adjusting process specifically includes:
(1) if the current ratio Q1 is more than or equal to M and less than or equal to Q2, the backlight current does not need to be adjusted;
(2) if the current ratio M is larger than Q2, calculating the comfortable current or the optimal current corresponding to the backlight comfortable brightness or the optimal brightness required by returning the current ratio M to the comfortable ratio region [ Q1, Q2] or the optimal ratio Q, and increasing the backlight current to the comfortable current or the optimal current;
(3) if the current ratio M < Q1, calculating the comfortable current or the optimal current corresponding to the backlight comfortable brightness or the optimal brightness required for returning the current ratio M to the comfortable ratio region [ Q1, Q2] or the optimal ratio Q, and reducing the backlight current to the comfortable current or the optimal current.
Preferably, the current ratio M and the comfort ratio Q1, Q2 after the backlight brightness adjustment is calculated are detected again, and the deviation of the output current from the brightness is prevented and corrected.
The present embodiment preferably but not limited to the backlight adopts a constant voltage input, and adjusts the backlight current by connecting the photoresistor or the adjustable resistor in parallel; the backlight brightness is adjusted by actually measuring the actual brightness of the backlight and only adjusting the backlight current by adopting constant voltage input, and compared with the prior art of calculating the backlight brightness by detecting the backlight voltage and then adjusting the backlight voltage, the backlight brightness adjusting method can prevent the deviation between the detected backlight voltage and the actual brightness caused by backlight aging.
As a further optimization of the present embodiment, in step S1, an adjustment region of the backlight brightness is also preset, and in step S5, if the calculated comfortable brightness or the optimum brightness of the backlight exceeds the preset adjustment region of the backlight brightness, a warning signal is sent.
The specific implementation mode is as follows: presetting an adjustment region of the backlight current in step S1, comparing a comfort current or an optimum current required for adjusting the backlight with the preset adjustment region of the backlight current before adjusting the backlight current in step S5, and adjusting the backlight current to the comfort current or the optimum current if the comfort current or the optimum current required for the backlight is within the preset adjustment region of the backlight current; and if the comfortable current or the optimal current required by the backlight is not in the preset regulation area of the backlight current, sending out a warning signal.
The specific numerical values of the upper limit and the lower limit of the preset backlight current adjusting area are different according to different backlight source models, the upper limit of the preset backlight current adjusting area is not larger than the maximum current which can be borne by the backlight source, and the lower limit of the preset backlight current adjusting area is not smaller than the current which corresponds to the screen when the surface brightness of the screen in a dark room is 50 cd/square meter (cd/square meter: light intensity unit).
The warning signal can be a character signal, a sound signal, a light signal and other common signal modes.
Since the adjustment of the backlight current is limited, and the damage of the backlight is accelerated by the too high or too low current, a limitation needs to be made on the adjustment of the backlight current; when the external light of the environment is too strong or too dark, the comfortable current or the optimal current required by the backlight to be adjusted to the comfortable brightness or the optimal brightness is higher or lower than the adjustment area of the backlight current, a warning signal is sent to a user, so that the user can be reminded to pay attention to the eyes, and the backlight can be prevented from being damaged.
Example two
As shown in fig. 2, a screen brightness adjusting system includes:
a first luminance detection unit: the device is used for detecting and obtaining an external light intensity value A;
a second luminance detection unit: the backlight module is used for detecting and obtaining a backlight light intensity value B;
a control module: the input end of the backlight module is respectively connected with the output ends of the first brightness detection unit and the second brightness detection unit, and the backlight module is used for calculating and comparing an external light intensity value A and a backlight light intensity value B obtained by the detection of the first brightness detection unit and the second brightness detection unit and outputting an adjusting current to backlight.
In this embodiment, the first brightness detection module and the second brightness detection module are preferably but not limited to light intensity sensors, and any other known method may be used to detect the outside light intensity value and the backlight light intensity value.
Preferably, the second brightness detection unit may also be a current sensor connected in series in the backlight circuit or in parallel with the backlight power supply, and the backlight light intensity increases with the increase of the backlight current within a certain range; fig. 3 shows the relationship between the backlight current and the backlight intensity of a 17.8V constant-voltage backlight, wherein the backlight current is shown on the X-axis in mA, and the backlight intensity is shown on the Y-axis in cd/square meter.
The control module includes: the device comprises a comparison unit, a calculation unit, a storage unit, a preset unit and a current control unit, wherein the comparison unit is respectively connected with the first brightness detection unit, the second brightness detection unit, the calculation unit, the storage unit, the preset unit and the current control unit; wherein,
a presetting unit: the optimal ratio Q for presetting the external light intensity/the backlight light intensity, the down-regulation ratio P1 and the up-regulation ratio P2 thereof;
a storage unit: the device is used for storing a preset optimal ratio Q of the external light intensity/the backlight light intensity, a down-regulation ratio P1 and an up-regulation ratio P2 of the optimal ratio Q, and calculating a calculation result of a unit;
for example, if the preset optimal ratio Q =5, the down-regulation ratio P1=10%, and the up-regulation ratio P2=20%, the comfort ratio range is [ Q1=5 (1-10%), Q2=5 (1 + 20%) ], and P1 and P2 may be equal.
A calculation unit: a comfort ratio region [ Q1, Q2] for calculating the outside light intensity/backlight light intensity; calculating the current ratio M = A/B of the external light intensity/the backlight light intensity according to the detection results of the first brightness detection unit and the second brightness detection unit; calculating a backlight comfort current or an optimal current required to adjust the current ratio M to [ Q1, Q2] or an optimal ratio Q;
a comparison unit: comparing the current ratio M calculated by the calculating unit with a preset comfort ratio region [ Q1, Q2] in the storage unit;
a current control unit: and outputting a comfort current or an optimum current to the backlight according to the comparison result of the comparison unit.
The specific values of the optimal ratio Q, the up-regulation ratio P1 and the down-regulation ratio P2 in this embodiment are set by the user according to the sensitivity of the user to light and the reading habit, and the specific setting mode is as follows: under the environment of any light intensity, a user enables the screen brightness to reach the best eye use habit by adjusting the backlight brightness, and sets the ratio of the external light intensity/the backlight light intensity at the moment as the best ratio Q; the P1 and the P2 can be set according to the habits of the user, the small P1 and the small P2 indicate that the reading quality requirement of the user is high, the backlight brightness needs to be adjusted in real time according to the ambient brightness, and if the large P1 and the large P2 indicate that the reading quality requirement of the user is low, the frequent change of the backlight brightness can be reduced.
The control module calculates the current ratio M = A/B by using a calculation unit through the external light intensity A and the backlight light intensity B detected by the first light intensity detection unit and the second light intensity detection unit; the current ratio M is compared with the comfort ratio region Q1, Q2, and the backlight brightness is adjusted so that the current ratio M returns to the comfort ratio region Q1, Q2.
Preferably, the control module compares the current ratio M with a comfort ratio region [ Q1, Q2] and adjusts the backlight brightness so that the current ratio M is equal to a preset optimal ratio Q.
The control module adjusts the backlight brightness by adjusting the backlight current, and specifically comprises:
(1) if the current ratio Q1 is more than or equal to M and less than or equal to Q2, the backlight current does not need to be adjusted;
(2) if the current ratio M is larger than Q2, calculating the comfortable current or the optimal current corresponding to the backlight comfortable brightness or the optimal brightness required by returning the current ratio M to the comfortable ratio region [ Q1, Q2] or the optimal ratio Q, and increasing the backlight current to the comfortable current or the optimal current;
(3) if the current ratio M < Q1, calculating the comfortable current or the optimal current corresponding to the backlight comfortable brightness or the optimal brightness required for returning the current ratio M to the comfortable ratio region [ Q1, Q2] or the optimal ratio Q, and reducing the backlight current to the comfortable current or the optimal current.
Preferably, the current ratio M and the comfort ratio Q1, Q2 after the backlight brightness adjustment is calculated are detected again, and the deviation of the output current from the backlight brightness is prevented and corrected.
The present embodiment preferably but not limited to the backlight adopts a constant voltage input, and adjusts the backlight current by connecting the photoresistor or the adjustable resistor in parallel; the backlight brightness is adjusted in a mode of adjusting the backlight current by actually measuring the actual brightness of the backlight and adopting backlight constant voltage input, and compared with the prior art of calculating the backlight brightness by detecting the backlight voltage and adjusting the backlight voltage, the backlight current adjusting method can prevent the deviation between the detected backlight voltage and the actual brightness caused by backlight aging.
The display device of this embodiment introduces the regional notion of the comfortable ratio of external light intensity/light intensity of being shaded, just carries out luminance control to being shaded when the current ratio surpasss comfortable ratio region, has avoided among the prior art because the frequent correction problem of the luminance of being shaded that causes such as the small change of user's walking, indoor outer light reduces the consumption of being shaded, under the prerequisite that does not influence visual effect, has increaseed the duration of battery.
As a further optimization of this embodiment, the control module further includes a warning unit, the storage unit is further preset with an adjustment region of the backlight current, and if the current ratio returns to the comfort ratio region or the optimal ratio, the required backlight comfort current or the optimal current exceeds the preset adjustment region of the backlight brightness, a warning signal is sent.
The specific implementation mode is as follows: if the comfortable current or the optimal current required by the backlight is in the preset adjusting area of the backlight current, adjusting the backlight current to the comfortable current or the optimal current; and if the comfortable current or the optimal current required by the backlight is not in the preset regulation area of the backlight current, sending out a warning signal.
The specific numerical values of the upper limit and the lower limit of the preset backlight current adjusting area are different according to different backlight source models, the upper limit of the preset backlight current adjusting area is not larger than the maximum current which can be borne by the backlight source, and the lower limit of the preset backlight current adjusting area is not smaller than the current which corresponds to the screen when the surface brightness of the screen in a dark room is 50 cd/square meter (cd/square meter: light intensity unit).
The warning signal can be a character signal, a sound signal, a light signal and other common signal modes.
Since the adjustment of the backlight current is limited, and the damage of the backlight is accelerated by the too high or too low current, a limitation needs to be made on the adjustment of the backlight current; when the external light intensity of the environment is too strong or too dark, and the comfortable current or the optimal current required by the backlight to be adjusted to the comfortable brightness or the optimal brightness is higher or lower than the adjustment area of the backlight current, a warning signal is sent to a user, so that the user can be reminded to pay attention to the eyes, and the backlight can be prevented from being damaged.
EXAMPLE III
A display device comprises the screen brightness adjusting system.
The display device further comprises a backlight module and a display module arranged on the backlight module, and the first brightness detection unit is preferably but not limited to a light intensity sensor arranged in a non-display area on the upper surface of the display module; the second brightness detection unit is preferably, but not limited to, a light intensity sensor disposed in a BM shielding region of a TFT substrate of the display module.
Preferably, the second brightness detection unit may also be a current sensor connected in series in the backlight circuit or in parallel with the backlight power supply, and the backlight light intensity increases with the increase of the backlight current within a certain range; fig. 3 shows the relationship between the backlight current and the backlight intensity of a 17.8V constant-voltage backlight, wherein the backlight current is shown on the X-axis in mA, and the backlight intensity is shown on the Y-axis in cd/square meter.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not understood as the limitation of the patent area of the present invention, but all the technical solutions obtained by using the equivalent substitution or the equivalent transformation should fall within the protection area of the present invention.
Claims (9)
1. A screen brightness adjusting method is characterized by comprising the following steps:
s1: presetting an optimal ratio of external light intensity/backlight light intensity, a down-regulation ratio and an up-regulation ratio thereof;
s2: calculating a comfortable ratio area of the external light intensity/the backlight light intensity;
s3: detecting and obtaining the external light intensity and the backlight light intensity of the screen in the current environment;
s4: calculating to obtain a current ratio of the external light intensity/backlight light intensity of the screen in the current environment;
s5: comparing the current ratio with the comfort ratio region: if the current ratio is in the comfortable ratio area, the brightness of the backlight does not need to be changed; and if the current ratio is not in the comfortable ratio area, adjusting the brightness of the backlight to return the current ratio to the comfortable ratio area.
2. The method for adjusting screen brightness according to claim 1, wherein in step S5, if the current ratio is not in the comfort ratio region, the current ratio is made equal to the preset optimal ratio by adjusting the brightness of the backlight.
3. The screen brightness adjusting method according to claim 1 or 2, wherein in the step S5, the method for adjusting the backlight brightness is to adjust the backlight brightness by adjusting the backlight current.
4. The method of claim 3, wherein if the current ratio is greater than the comfort ratio region, calculating a backlight comfort current or an optimal current corresponding to the backlight comfort brightness or the optimal brightness required by the current ratio back to the comfort ratio region or the optimal ratio, and increasing the backlight current to the comfort current or the optimal current.
5. The method of claim 3, wherein if the current ratio is smaller than the comfort ratio region, calculating a backlight comfort current or an optimal current corresponding to the backlight comfort brightness or the optimal brightness required by the current ratio back to the comfort ratio region or the optimal ratio, and reducing the backlight current to the comfort current or the optimal current.
6. The screen brightness adjusting method of claim 1 or 2, wherein in the step S1, an adjusting region of backlight brightness is preset, and in the step S5, if the backlight comfort brightness or the optimal brightness required by the current ratio returning to the comfort ratio region or the optimal ratio exceeds the adjusting region of preset backlight brightness, a warning signal is sent.
7. A screen brightness adjustment system, comprising:
a first luminance detection unit: the device is used for detecting and obtaining an outside light intensity value;
a second luminance detection unit: the backlight module is used for detecting and obtaining a backlight light intensity value;
a control module: the input end of the backlight module is respectively connected with the output ends of the first brightness detection unit and the second brightness detection unit, and the backlight module is used for calculating and comparing an external light intensity value and a backlight light intensity value which are obtained by the detection of the first brightness detection unit and the second brightness detection unit and outputting an adjusting current to backlight; wherein,
the control module includes: the device comprises a comparison unit, a calculation unit, a storage unit, a preset unit and a current control unit, wherein the comparison unit is respectively connected with the first brightness detection unit, the second brightness detection unit, the calculation unit, the storage unit, the preset unit and the current control unit; wherein,
a presetting unit: the method is used for presetting an optimal ratio of the external light intensity/the backlight light intensity, a down-regulation ratio and an up-regulation ratio thereof;
a storage unit: the device is used for storing the preset optimal ratio of the external light intensity/the backlight light intensity, the down-regulation ratio and the up-regulation ratio thereof and calculating the calculation result of the unit;
a calculation unit: a comfort ratio region for calculating the external light intensity/backlight light intensity; calculating the current ratio of the external light intensity/the backlight light intensity according to the detection results of the first brightness detection unit and the second brightness detection unit; calculating a backlight comfort current or an optimal current required for adjusting the current ratio to a comfort ratio region or an optimal ratio;
a comparison unit: comparing the current ratio calculated by the calculating unit with the comfortable ratio area in the storage unit;
a current control unit: and outputting a comfort current or an optimum current to the backlight according to the comparison result of the comparison unit.
8. The system of claim 7, wherein the control module further comprises an alarm unit, the memory unit is further preset with a regulation area of the backlight current, and the alarm unit sends an alarm signal if the comfort current or the optimal current output by the current control unit is not in the regulation area.
9. A display device comprising the screen brightness adjustment system of claim 7 or 8.
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| CN105895055A (en) | 2016-08-24 |
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