Method for adjusting display parameters and display device using the same
A method for adjusting display parameters in a display device detects a change (second intensity value) in ambient light levels from a first intensity value of ambient light and corresponding first set of display parameters applied to the display device. Second set of display parameters are calculated according to the first intensity value and the second intensity value as well as the first set of display parameters. The display parameters of the display device are adjusted from the first set of display parameters to the second set of display parameters to take account of the change represented by the second intensity value.
1. A method for adjusting display parameters of a display device, comprising:
detecting a second intensity value of ambient light, wherein the second intensity value of the ambient light is an average value of n intensity values of the ambient light within an effective cycle time, wherein n is an integer with a preset range;
acquiring a first intensity value of ambient light retained from an initial or prior reading, wherein the first intensity value of the ambient light is an average value of the n intensity values of the ambient light within a prior effective cycle time from the effective cycle time for detecting the second intensity value;
applying a first set of display parameters to the display device corresponding to the first intensity value of the ambient light;
calculating a second set of display parameters according to the first intensity value of the ambient light, the second intensity value of the ambient light, and the first set of display parameters of the display device; and
adjusting the display parameters of the display device from the first set of display parameters to the second set of display parameters;
wherein the display parameters of the display device include brightness and saturation, the first or second set of display parameters include both a brightness and a saturation values, a ratio of the brightness value to the saturation value is equals a preset constant tan θ, θ is a default angle, and a range of the intensity value of the ambient light is 0 to N−1.
2. The method for adjusting display parameters of claim 1 , wherein the second set of display parameters may be calculated as follows:
L
2
=
b
-
d
N
+
L
1
;
and
S
2
=
(
b
-
d
N
+
L
1
)
*
tan
θ
,
wherein, the L 1 stands for a brightness value of the first set of display parameters, the L 2 stands for a brightness value of the second set of display parameters, the b stands for the second intensity value of the ambient light, the d stands for the first intensity value of the ambient light, and the S 2 stands for a saturation value of the second set of display parameters.
3. The method for adjusting display parameters of claim 1 , wherein the detecting step of the second intensity value further comprises:
periodically collecting at most n intensity values of ambient light within a cycle time;
determining the cycle time is an effective cycle time when number of collected intensity values equals n; and
when the cycle time is an ineffective cycle time, terminating the collecting operation within the cycle time, and continuously re-starting the collecting operation for a next cycle time until an effective cycle time is determined, wherein the average value of n intensity values of the ambient light within the effective cycle time serves as the second intensity value of the ambient light.
4. The method for adjusting display parameters of claim 3 , wherein the determining the cycle time is an effective cycle time step further comprises:
among the n intensity values of the ambient light, comparing a currently detected intensity value of the ambient light from the n intensity values of the ambient light with a prior intensity value of the ambient light; and
after comparisons for the overall n intensity values of the ambient light, difference between one of the n intensity values of the ambient light and its prior intensity value of the ambient light is greater than a preset value, determining the cycle time as an effective cycle time.
5. A display device, comprising:
at least one processor;
a non-transitory storage system coupled to the at least one processor and configured to store one or more programs configured to be executed by the at least one processor, the one or more programs comprising instructions for:
detecting a second intensity value of ambient light, wherein the second intensity value of the ambient light is an average value of n intensity values of the ambient light within an effective cycle time, wherein n is an integer with a preset range;
acquiring a first intensity value of ambient light retained from an initial or prior reading, wherein the first intensity value of the ambient light is an average value of the n intensity values of the ambient light within a prior effective cycle time from the effective cycle time for detecting the second intensity value;
applying a first set of display parameters to the display device corresponding to the first intensity value of the ambient light;
calculating a second set of display parameters according to the first intensity value of the ambient light, the second intensity value of the ambient light, and the first set of display parameters of the display device; and
adjusting the display parameters of the display device from the first set of display parameters to the second set of display parameters;
wherein the display parameters of the display device include brightness and saturation, the first or second set of display parameters include both a brightness and a saturation values, a ratio of the brightness value to the saturation value is equals a preset constant tan θ, θ is a default angle, and a range of the intensity value of the ambient light is 0 to N−1.
6. The display device of claim 5 , wherein the second set of display parameters may be calculated as follows:
L
2
=
b
-
d
N
+
L
1
;
and
S
2
=
(
b
-
d
N
+
L
1
)
*
tan
θ
,
wherein, the L 1 stands for a brightness value of the first set of display parameters, the L 2 stands for a brightness value of the second set of display parameters, the b stands for the second intensity value of the ambient light, the d stands for the first intensity value of the ambient light, and the S 2 stands for the saturation value of the second set of display parameters.
7. The display device of claim 5 , wherein the display device further comprises:
periodically collecting at most n intensity values of ambient light within a cycle time;
determining the cycle time is an effective cycle time when number of collected intensity values equals n; and
when the cycle time is an ineffective cycle time, terminating the collecting operation within the cycle time, and continuously re-starting the collecting operation for a next cycle time until an effective cycle time is determined, wherein the average value of n intensity values of the ambient light within the effective cycle time serves as the second intensity value of the ambient light.
8. The display device of claim 7 , wherein the display device further comprises:
among the n intensity values of the ambient light, comparing a currently detected intensity value of the ambient light from the n intensity values of the ambient light with a prior intensity value of the ambient light; and
after comparisons for the overall n intensity values of the ambient light, difference between one of the n intensity values of the ambient light and its prior intensity value of the ambient light is greater than a preset value, determining the cycle time as an effective cycle time.