CN109119031B - method, device and electronic equipment for controlling output brightness of display screen - Google Patents
method, device and electronic equipment for controlling output brightness of display screen Download PDFInfo
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Abstract
The embodiment of the invention relates to methods and devices for controlling output brightness of a display screen, and electronic equipment, wherein the method comprises the steps of obtaining a red light characteristic value of a red light spectrum, a green light characteristic value of a green light spectrum, and a blue light characteristic value of a blue light spectrum, calculating an output brightness value of the display screen according to the obtained red light characteristic value, green light characteristic value, and blue light characteristic value, adjusting the backlight brightness of the display when the calculated output brightness value of the display screen does not accord with a preset output brightness value of the display screen, and then returning to the obtaining step to continue execution until the calculated output brightness value of the display screen accords with the preset output brightness value of the display screen.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to methods and devices for controlling output brightness of a display screen and electronic equipment.
Background
At present, most of professional displays need to keep constant output of brightness in the life cycle, however, it is found by actual measurement that the spectrum output by the display backlight changes with the continuous accumulation of the display backlight use time, and the backlight detection module generally has higher detection sensitivity to a certain waveband and decays detection sensitivity of other wavebands, therefore, some changes of the display backlight output spectrum may not be detected by the backlight detection module, and thus, the long-term high-precision and high-stability brightness output of the display screen cannot be realized by the mode of controlling the output brightness of the display screen by the backlight detection module.
Due to the temperature effect of the liquid crystal molecules, when the temperature of the use environment changes, the output brightness of the display screen changes accordingly, and the change cannot be detected by the backlight detection module, so that the influence of the temperature effect of the liquid crystal molecules cannot be overcome by the backlight detection module, and the currently used backlight detection control mode cannot keep the high-precision and high-stability brightness output of the display screen for a long time.
Disclosure of Invention
In order to solve the technical problem that the long-term high-precision high-stability brightness output of a display screen cannot be realized in the prior art, the embodiment of the invention provides methods and devices for controlling the output brightness of the display screen and electronic equipment.
A method for controlling the output brightness of a display screen, comprising:
acquiring a red light characteristic value of a red light spectrum, a green light characteristic value of a green light spectrum and a blue light characteristic value of a blue light spectrum;
calculating the output brightness value of the screen of the display according to the acquired red light characteristic value, green light characteristic value and blue characteristic value;
and when the calculated display screen output brightness value is not accordant with the preset display screen output brightness value, adjusting the backlight brightness of the display, and then returning to the acquiring step to continue executing until the calculated display screen output brightness value is accordant with the preset display screen output brightness value.
, the method calculates the output brightness value of the display screen according to the acquired red light characteristic value, green light characteristic value and blue light characteristic value based on the functional relationship between the red light characteristic value, green light characteristic value and blue light characteristic value and the output brightness value of the display screen.
, the method for training the functional relationship between the red, green and blue light characteristic values and the output brightness value of the display screen comprises:
acquiring a plurality of groups of actual output brightness values of a display screen in a certain area under different backlight brightness and different environmental temperatures and corresponding red light characteristic values, green light characteristic values and blue light characteristic values;
and training the functional relation between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen according to the obtained actual output brightness value and the corresponding red light characteristic value, green light characteristic value and blue light characteristic value.
And , expressing the functional relation as SLv ═ a X + b Y + c Z, wherein SLv represents the output brightness of the display screen, X represents the characteristic value of red light, Y represents the characteristic value of green light, Z represents the characteristic value of blue light, and a, b and c are fitting parameters.
, the obtaining the red light characteristic value of the red light spectrum, the green light characteristic value of the green light spectrum and the blue light characteristic value of the blue light spectrum includes obtaining the red light characteristic value, the green light characteristic value and the blue light characteristic value on the back of the display screen and/or obtaining the red light characteristic value, the green light characteristic value and the blue light characteristic value on the front of the display screen.
an apparatus for controlling the output brightness of a display screen, comprising:
the acquisition module is used for acquiring a red light characteristic value of a red light spectrum, a green light characteristic value of a green light spectrum and a blue light characteristic value of a blue light spectrum;
the calculation module is used for calculating the output brightness value of the screen of the display according to the red light characteristic value, the green light characteristic value and the blue characteristic value acquired by the acquisition module;
and the adjusting module is used for adjusting the backlight brightness of the display when the display screen output brightness value calculated by the calculating module does not accord with the preset display screen output brightness value, and informing the obtaining module to obtain the red light characteristic value, the green light characteristic value and the blue light characteristic value again until the display screen output brightness value calculated by the calculating module accords with the preset display screen output brightness value.
, the calculation module calculates the output brightness value of the display screen according to the red light characteristic value, the green light characteristic value and the blue light characteristic value obtained by the obtaining module based on the functional relationship between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen.
Further , the training the red, green, and blue light eigenvalues as a function of display screen output luminance value includes:
acquiring a plurality of groups of actual output brightness values of a display screen in a certain area under different backlight brightness and different environmental temperatures and corresponding red light characteristic values, green light characteristic values and blue light characteristic values;
and training the functional relation between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen according to the obtained actual output brightness value and the corresponding red light characteristic value, green light characteristic value and blue light characteristic value.
And , expressing the functional relation as SLv ═ a X + b Y + c Z, wherein SLv represents the output brightness of the display screen, X represents the characteristic value of red light, Y represents the characteristic value of green light, Z represents the characteristic value of blue light, and a, b and c are fitting parameters.
, the obtaining the red light characteristic value of the red light spectrum, the green light characteristic value of the green light spectrum and the blue light characteristic value of the blue light spectrum includes obtaining the red light characteristic value, the green light characteristic value and the blue light characteristic value on the back of the display screen and/or obtaining the red light characteristic value, the green light characteristic value and the blue light characteristic value on the front of the display screen.
an electronic device for controlling the output brightness of a display screen, comprising:
the detection module is used for detecting a red light characteristic value of a red light spectrum, a green light characteristic value of a green light spectrum and a blue light characteristic value of a blue light spectrum;
and the control module is connected with the detection module, can acquire the red light characteristic value, the green light characteristic value and the blue light characteristic value detected by the detection module, and can adjust the backlight brightness of the display and inform the detection module of the detection module to detect again when judging that the output brightness value of the display screen corresponding to the red light characteristic value, the green light characteristic value and the blue light characteristic value is not consistent with the preset output brightness value of the display screen.
, the control module calculates the output brightness value of the display screen based on the functional relationship between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen, and determines whether the calculated output brightness value of the display screen matches the preset output brightness value of the display screen.
Further , the training the red, green, and blue light eigenvalues as a function of display screen output luminance value includes:
acquiring a plurality of groups of actual output brightness values of a display screen in a certain area under different backlight brightness and different environmental temperatures and corresponding red light characteristic values, green light characteristic values and blue light characteristic values;
and training the functional relation between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen according to the obtained actual output brightness value and the corresponding red light characteristic value, green light characteristic value and blue light characteristic value.
And , expressing the functional relation as SLv ═ a X + b Y + c Z, wherein SLv represents the output brightness of the display screen, X represents the characteristic value of red light, Y represents the characteristic value of green light, Z represents the characteristic value of blue light, and a, b and c are fitting parameters.
Further , the detection module is located on the back side of the display screen and/or on the front side of the display screen.
According to the method, the device and the electronic equipment for controlling the output brightness of the display screen, the red light spectrum, the green light spectrum and the blue light spectrum are independently detected, and the output brightness of the display screen is represented by adopting the characteristic values of the red light spectrum, the green light spectrum and the blue light spectrum, so that the adverse effect on the output brightness of the display screen caused by the fact that the backlight detection module does not detect the backlight output spectrum change caused by the accumulation of the use time of the screen is effectively reduced, and the high-precision and high-stability brightness output of the display screen can be realized.
The method, the device and the electronic equipment for controlling the output brightness of the display screen provided by the embodiment of the invention utilize the actual output brightness value of the display screen measured outside the display and the detected red light characteristic value, green light characteristic value and blue light characteristic value, train the functional relation between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen by means of a large amount of real sample data, not only consider the influence of backlight, but also consider the influence of environment temperature on the display screen, namely the influence of liquid crystal molecule temperature effect, thereby effectively reducing the influence of the temperature effect of liquid crystal molecules on the output brightness of the display screen, improving the precision and the stability of the output brightness of the display screen of the liquid crystal display, in addition, also consider the difference of different display screens, and being beneficial to improving the precision and the stability of the output brightness of the display screen by steps.
Drawings
FIG. 1 is a flowchart illustrating a method for controlling an output brightness of a display screen according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an apparatus for controlling an output brightness of a display screen according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a display area of a display screen and a sensor collecting area in a scheme for controlling the output brightness of the display screen according to an embodiment of the present invention.
Detailed Description
For purposes of making the objects, aspects and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following detailed description and drawings.
Example 1:
methods for controlling output brightness of a display screen according to embodiment 1 of the present invention, as shown in fig. 1, include:
step S11: acquiring a red light characteristic value of a red light spectrum, a green light characteristic value of a green light spectrum and a blue light characteristic value of a blue light spectrum;
the characteristic value in this embodiment is a physical characteristic of a spectrum represented in a numerical form. For example, when representing the brightness, the characteristic value may be an electrical signal obtained by converting the optical signal of the spectrum through the photoelectric conversion module.
Step S12: calculating the output brightness value of the display screen according to the acquired red light characteristic value, green light characteristic value and blue characteristic value based on the functional relation between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen;
step S13: judging whether the calculated output brightness value of the display screen is consistent with a preset output brightness value of the display screen or not;
step S14: if the calculated output brightness value of the display screen does not accord with the preset output brightness value of the display screen, adjusting the backlight brightness of the display, and repeatedly executing the acquiring step, the calculating step, the judging step and the adjusting step until the calculated output brightness value of the display screen accords with the preset output brightness value of the display screen, and ending the operation of controlling the output brightness of the display screen at this time.
Those skilled in the art will appreciate that when the display backlight brightness value changes, the display screen output brightness value will typically also change.
The method for controlling the output brightness of the display screen provided by the embodiment of the invention can be performed times when the display is started, can be performed in real time in the working process of the display screen or periodically according to a preset time interval, and can be performed when an external instruction is received.
The preset display screen output brightness value in the embodiment of the invention can be a value set in factory or a value set by a user, and the preset value can be modified as required in the using process of the display.
In some embodiments, when the display is turned on, the backlight brightness of the display is provided based on the preset screen output brightness value of the display, so that the adjustment times are effectively reduced, and the control efficiency is improved.
According to the method for controlling the output brightness of the display screen, the red light characteristic value, the green light characteristic value and the blue light characteristic value are obtained by independently detecting the red light spectrum, the green light spectrum and the blue light spectrum, and the output brightness of the display screen is represented by adopting the red light characteristic value, the green light characteristic value and the blue light characteristic value, so that the adverse effect on the output brightness of the display screen caused by the fact that the backlight detection module does not detect the backlight output spectrum change caused by the accumulation of the use time of the screen in the prior art is effectively reduced. The method for controlling the output brightness of the display screen provided by the embodiment of the invention can realize the high-precision high-stability brightness output of the display screen.
Embodiment 1 of the present invention further provides apparatuses for controlling the output brightness of a display screen, as shown in fig. 2, including:
the acquisition module is used for acquiring a red light characteristic value of a red light spectrum, a green light characteristic value of a green light spectrum and a blue light characteristic value of a blue light spectrum;
the calculation module is used for calculating the output brightness value of the display screen according to the red light characteristic value, the green light characteristic value and the blue characteristic value acquired by the acquisition module based on the functional relationship between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen;
the judging module is used for judging whether the display screen output brightness value calculated by the calculating module is consistent with a preset display screen output brightness value or not;
and the adjusting module is used for adjusting the backlight brightness of the display when the output brightness value of the display screen calculated by the calculating module does not accord with the preset output brightness value of the display screen, and informing the obtaining module to obtain the red light characteristic value of the red light spectrum, the green light characteristic value of the green light spectrum and the blue light characteristic value of the blue light spectrum again until the output brightness value of the display screen calculated by the calculating module accords with the preset output brightness value of the display screen, so that the operation of controlling the output brightness of the display screen is finished.
Those skilled in the art will appreciate that when the display backlight brightness changes, the display screen output brightness will also change in general.
The device for controlling the output brightness of the display screen provided by the embodiment of the invention can be performed times when the display is started, can be performed in real time in the working process of the display screen or periodically according to a preset time interval, and can be performed when an external instruction is received.
The preset display screen output brightness value in the embodiment of the invention can be a value set in factory or a value set by a user, and the preset value can be modified as required in the using process of the display.
In some embodiments, when the display is turned on, the backlight brightness of the display is provided based on the preset screen output brightness value of the display, so that the adjustment times are effectively reduced, and the control efficiency is improved.
The device for controlling the output brightness of the display screen provided by the embodiment of the invention obtains the red light characteristic value, the green light characteristic value and the blue light characteristic value by independently detecting the red light spectrum, the green light spectrum and the blue light spectrum, and represents the output brightness of the display screen by adopting the red light characteristic value, the green light characteristic value and the blue light characteristic value, so that the adverse effect on the output brightness of the display screen caused by the fact that the backlight output spectrum change caused by the accumulation of the use time of the screen is not detected by the backlight detection module is effectively reduced. The device for controlling the output brightness of the display screen provided by the embodiment of the invention can realize the high-precision and high-stability brightness output of the display screen.
The embodiment proposes electronic devices for controlling the output brightness of a display screen, comprising:
the detection module is used for detecting a red light characteristic value of a red light spectrum, a green light characteristic value of a green light spectrum and a blue light characteristic value of a blue light spectrum;
and the control module is connected with the detection module, can acquire the red light characteristic value, the green light characteristic value and the blue light characteristic value detected by the detection module from the detection module, and can inform the detection module of detecting the red light characteristic value, the green light characteristic value and the blue light characteristic value.
When the output brightness of the display screen is controlled, the control module calculates the output brightness value of the display screen according to the red light characteristic value, the green light characteristic value and the blue light characteristic value detected by the detection module based on the functional relation between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen; and judging whether the calculated output brightness value of the display screen is consistent with a preset output brightness value of the display screen, if the calculated output brightness value of the display screen is not consistent with the preset output brightness value of the display screen, adjusting the backlight brightness of the display, informing a detection module to detect the red light characteristic value of the red light spectrum, the green light characteristic value of the green light spectrum and the blue light characteristic value of the blue light spectrum again, repeating the calculation operation, the judgment operation and the adjustment operation until the calculated output brightness value of the display screen is judged to be consistent with the preset output brightness value of the display screen, and ending the operation of controlling the output brightness of the display screen.
Those skilled in the art will appreciate that when the display backlight brightness changes, the display screen output brightness will also change in general.
When the electronic device for controlling the output brightness of the display screen provided by the embodiment of the invention is used for controlling the output brightness of the display screen, times of control operation can be performed when the display is started, the control operation can be performed in real time or periodically according to a preset time interval in the working process of the display screen, and the control operation can be performed when an external instruction is received.
The preset display screen output brightness value in the embodiment of the invention can be a value set in factory or a value set by a user, and the preset value can be modified as required in the using process of the display.
In some embodiments, when the display is turned on, the control module of the electronic device provides the backlight brightness of the display based on the preset screen output brightness value of the display, thereby effectively reducing the adjustment times and improving the control efficiency.
According to the electronic device for controlling the output brightness of the display screen, the red light characteristic value, the green light characteristic value and the blue light characteristic value are obtained by independently detecting the red light spectrum, the green light spectrum and the blue light spectrum, and the output brightness of the display screen is represented by adopting the red light characteristic value, the green light characteristic value and the blue light characteristic value, so that the adverse effect on the output brightness of the display screen caused by the fact that the backlight output spectrum change caused by accumulation of the use time of the screen is not detected by the backlight detection module is effectively reduced. The electronic equipment for controlling the output brightness of the display screen provided by the embodiment of the invention can realize the high-precision and high-stability brightness output of the display screen.
Example 2:
this embodiment exemplifies the functional relationship between the red, green and blue light characteristic values and the output luminance value of the display screen in embodiment 1.
In this embodiment, the functional relationship between the red light characteristic value, the green light characteristic value, and the blue light characteristic value and the output brightness value of the display screen is a characterization model trained by using a large amount of real sample data. The method comprises the steps of obtaining a plurality of sets of display screens, training a characterization model, and obtaining a plurality of sets of real sample data, wherein the large amount of real sample data considers different backlight brightness of the display, different environment temperatures of the display screens and a plurality of sets of display screens, so that the trained characterization model can be closer to the real functional relation between three characteristic values and the output brightness of the display screens.
The method for training the functional relation between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen comprises the following steps:
the method comprises the steps of firstly, acquiring actual output brightness values of a plurality of groups of display screens in a certain area under different backlight brightness and different environmental temperatures and corresponding red light characteristic values, green light characteristic values and blue light characteristic values, wherein the actual output brightness values of the display screens can be obtained by measuring with a standard instrument, and the red light characteristic values, the green light characteristic values and the blue light characteristic values can be obtained by detecting with a detection module;
and then, training the functional relation between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen according to the obtained actual output brightness value of the display screen in the area under the different groups of different backlight brightness and different environmental temperatures and the corresponding red light characteristic value, green light characteristic value and blue light characteristic value.
The region may be any region in the display area of the display screen. Preferably, the area is a central area of the display screen.
In the embodiment, sensor modules with higher sensitivity to red, green, and blue light are selected as the detection modules for detecting the red, green, and blue eigenvalues based on the spectral characteristics of the display screen.
The method for controlling the output brightness of the display screen provided by the embodiment utilizes the actual output brightness value of the display screen measured outside the display and the detected red light characteristic value, green light characteristic value and blue light characteristic value, trains the functional relationship between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen by means of a large amount of real sample data, not only considers the influence of backlight, but also considers the influence of environment temperature on the display screen, namely the influence of liquid crystal molecule temperature effect, so that the influence of the liquid crystal molecule temperature effect on the output brightness of the display screen can be effectively reduced, and the precision and the stability of the output brightness of the liquid crystal display screen are improved, in addition, the difference of different display screens is also considered, and the improvement of the precision and the stability of the output brightness of the liquid crystal display screen is facilitated by .
By adopting the technical scheme of the embodiment, the brightness output by the screen of the display is continuously measured at room temperature for a long time, and the fluctuation range of the brightness output by the screen of the display is found to be-2% through the analysis of actually measured data, and can be improved by 60% compared with the fluctuation range of-5% in the prior art.
Example 3:
the present embodiment adopts a ternary order equation to characterize the functional relationship between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen in embodiments 1 and 2, and takes the central area of the display screen as the area for acquiring the output brightness value of the display screen, and trains the functional relationship by acquiring a large amount of real sample data.
The inventor finds that the red light characteristic value, the green light characteristic value and the blue light characteristic value are approximately in expression relation of a ternary -degree equation with the output brightness of the display screen in the research process, so that the functional relation between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen can be truly represented by adopting the expression of the ternary -degree equation.
The expression of the ternary equation is SLv ═ a × X + b × Y + c × Z, where SLv denotes the display screen output brightness, X denotes the red light characteristic value, Y denotes the green light characteristic value, Z denotes the blue light characteristic value, and a, b and c are fitting parameters.
In this embodiment, with the backlight luminance L, the usage environment temperature T, and the display screen S as variables, the actual luminance values of the display screen center regions corresponding to the different variables are measured by a standard instrument, the measured actual luminance values of the display screen center regions are represented by PLv, the actual luminance values of the display screen center regions measured at the ith backlight luminance Li, the jth usage environment temperature Tj, and the kth display screen Sk are represented by PLv (Li, Tj, Sk), and i, j, and k take natural numbers; independently collecting characteristic values of three colors of red light, green light and blue light by a detection module, wherein X (Li, Tj, Sk) represents the characteristic value of the red light collected when Li, Tj and Sk are variable, Y (Li, Tj, Sk) represents the characteristic value of the green light collected when Li, Tj and Sk are variable, and Z (Li, Tj, Sk) represents the characteristic value of the blue light collected when Li, Tj and Sk are variable;
based on the above expression, fitting parameters a, b, and c are derived from the collected characteristic values X (Li, Tj, Sk), Y (Li, Tj, Sk), and Z (Li, Tj, Sk) and the measured actual luminance value PLv (Li, Tj, Sk), so that the SLv calculated according to the expression is infinitely close to the measured actual luminance value PLv.
In the embodiment, fitting parameters a, b, and c are derived using the least squares method, such that (SLv-PLv)2And minimum.
Example 4:
the present embodiment performs kinds of exemplary descriptions on the location of the detection module based on the foregoing embodiments 1, 2, and 3.
In this embodiment, the detection module is located on the back surface of the display screen, and detects light that is emitted from the backlight module of the display but is not yet applied to the display screen, and at this time, the red light feature value, the green light feature value, and the blue light feature value that are used to train the functional relationship in embodiments 2 and 3 are the red light feature value, the green light feature value, and the blue light feature value of the spectrum acquired from the back surface of the display screen.
Preferably, an th sensor collecting area is divided on the back of the display screen for placing the sensor module of the detection module, and the sensor module collects the red light characteristic value, the green light characteristic value and the blue light characteristic value of the spectrum in the th sensor collecting area.
The detection module of this embodiment may be configured with or more sensor modules at the same position of , or with or more sensors at different positions, and the average of all detected red light characteristic values is used as the corresponding red light characteristic value, the average of all detected green light characteristic values is used as the corresponding green light characteristic value, and the average of all detected blue light characteristic values is used as the corresponding blue light characteristic value.
Example 5:
the present embodiment performs a second exemplary description on the position of the detection module based on the foregoing embodiments 1, 2, and 3.
In this embodiment, the detection module is located on the front surface of the display screen to detect the light emitted from the front surface of the display screen, and at this time, the red light characteristic value, the green light characteristic value, and the blue light characteristic value used to train the functional relationship in embodiments 2 and 3 are the red light characteristic value, the green light characteristic value, and the blue light characteristic value of the spectrum acquired from the front surface of the display screen.
Preferably, a screen display area and a second sensor acquisition area are divided on the display screen, the second sensor acquisition area is used for placing a sensor module of the detection module, and the sensor module acquires a red light characteristic value, a green light characteristic value and a blue light characteristic value of a light spectrum in the second sensor acquisition area. The sensor acquisition area is positioned at the edge of the front surface of the display screen in order to not affect the normal display and viewing of the screen display area. Fig. 3 shows an example of a sensor acquisition area located at the lower right edge of the front of the display screen.
The detection module of this embodiment may be configured with or more sensor modules at the same position of , or with or more sensors at different positions, and the average of all detected red light characteristic values is used as the corresponding red light characteristic value, the average of all detected green light characteristic values is used as the corresponding green light characteristic value, and the average of all detected blue light characteristic values is used as the corresponding blue light characteristic value.
Example 6:
the present embodiment performs a third exemplary explanation on the position of the detection module on the basis of the foregoing embodiments 1, 2, and 3.
In this embodiment, the detection modules are located on the back side of the display screen (corresponding to embodiment 4) and the front side of the display screen (corresponding to embodiment 5), and for the sake of convenience of distinction, the detection module located on the back side of the display screen is referred to as th detection module, and the detection module located on the front side of the display screen is referred to as second detection module.
The th detection module detects light emitted from the backlight module of the display but not applied to the screen of the display, and the th functional relationship between the red, green and blue characteristic values and the output brightness value of the display screen is trained according to the red, green and blue characteristic values of the spectrum detected by the th detection module in the embodiment 2 and the embodiment 3.
The second detection module detects light emitted from the front side of the display screen, and in embodiments 2 and 3, a second functional relationship between the red light characteristic value, the green light characteristic value, and the blue light characteristic value and the output brightness value of the display screen is trained according to the red light characteristic value, the green light characteristic value, and the blue light characteristic value of the spectrum detected by the second detection module at the back side of the display screen.
Based on th functional relationship, calculating the output brightness value of the display screen according to the obtained red light characteristic value, green light characteristic value and blue characteristic value of the back of the display, wherein the output brightness value of the display screen is called th output brightness value for the convenience of distinguishing;
acquiring a red light characteristic value of a red light spectrum, a green light characteristic value of a green light spectrum and a blue light characteristic value of a blue light spectrum on the front face of the display; based on a second functional relation, calculating a screen output brightness value of the display according to the obtained red light characteristic value, the obtained green light characteristic value and the obtained blue characteristic value of the back of the display, wherein the screen output brightness value of the display is called as a second output brightness value for the convenience of distinguishing;
and when the th output brightness value and the second output brightness value do not accord with the respective preset display screen output brightness value at any time , adjusting the display backlight brightness, re-acquiring the red light characteristic value of the red light spectrum, the green light characteristic value of the green light spectrum and the blue light characteristic value of the blue light spectrum on the back surface of the display, and re-acquiring the red light characteristic value of the red light spectrum, the green light characteristic value of the green light spectrum and the blue light characteristic value of the blue light spectrum on the front surface of the display until the th output brightness value and the second output brightness value accord with the respective preset display screen output brightness values.
In the embodiment, the detection modules are arranged on the back surface and the front surface of the display screen, so that the control accuracy can be improved, the detection modules and the display screen are mutually backup, when a fault occurs on the side, the detection modules can be independently controlled by the other side, and the control safety and reliability can be improved.
The embodiment of the invention also provides computer readable storage media, which store computer programs for executing the methods.
An embodiment of the present invention further provides computer apparatuses, including a processor and the computer-readable storage medium operatively connected to the processor, where the processor executes a computer program in the computer-readable storage medium.
Those of skill in the art will understand that the logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be viewed as implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include an electrical connection (an electronic device) having or more wires, a portable computer diskette cartridge (a magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM).
For example, if implemented in hardware, and as in another embodiment, any of or combinations thereof may be implemented in discrete logic circuitry having logic circuitry for implementing logic functions on data signals, an application specific integrated circuit having appropriate combinational logic circuitry, a programmable array (PGA), a field programmable array (FPGA), etc., as is known in the art.
In the description herein, reference to the terms " embodiments," " embodiments," "examples," "specific examples," or " examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least embodiments or examples of the invention.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (15)
1, A method for controlling the output brightness of a display screen, comprising:
acquiring a red light characteristic value of a red light spectrum, a green light characteristic value of a green light spectrum and a blue light characteristic value of a blue light spectrum;
calculating the output brightness value of the display screen according to the acquired red light characteristic value, green light characteristic value and blue characteristic value based on the functional relation between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen; the expression of the functional relationship is: SLv ═ a × X + b × Y + c × Z; wherein SLv represents the output brightness of a display screen, X represents a red light characteristic value, Y represents a green light characteristic value, Z represents a blue light characteristic value, and a, b and c are fitting parameters;
when the calculated display screen output brightness value is not consistent with the preset display screen output brightness value, adjusting the display backlight brightness, and then returning to the acquiring step to continue executing until the calculated display screen output brightness value is consistent with the preset display screen output brightness value;
the method for training the functional relation between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen comprises the following steps:
acquiring a plurality of groups of actual output brightness values of a display screen in a certain area under different backlight brightness and different environmental temperatures and corresponding red light characteristic values, green light characteristic values and blue light characteristic values;
and training the functional relation between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen according to the obtained actual output brightness value and the corresponding red light characteristic value, green light characteristic value and blue light characteristic value.
2. The method of claim 1, wherein the display backlight brightness at the time of the display power-on is provided based on the preset display screen output brightness value.
3. The method of claim 1, wherein the region is a center region of a display screen.
4. The method of claim 1, wherein the fitting parameters a, b and c are derived using a least squares method such that (SLv-PLv)2Minimum, where PLv is the actual brightness value measured.
5. The method of , wherein the obtaining the red, green and blue light characteristics of the red, green and blue light spectra comprises obtaining the red, green and blue light characteristics on a back side of a display screen and/or obtaining the red, green and blue light characteristics on a front side of the display screen.
An apparatus for controlling the output brightness of a display screen, comprising:
the acquisition module is used for acquiring a red light characteristic value of a red light spectrum, a green light characteristic value of a green light spectrum and a blue light characteristic value of a blue light spectrum;
the calculation module is used for calculating the output brightness value of the display screen according to the red light characteristic value, the green light characteristic value and the blue characteristic value acquired by the acquisition module based on the functional relationship between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen; the expression of the functional relationship is: SLv ═ a × X + b × Y + c × Z; wherein SLv represents the output brightness of a display screen, X represents a red light characteristic value, Y represents a green light characteristic value, Z represents a blue light characteristic value, and a, b and c are fitting parameters;
the adjusting module is used for adjusting the backlight brightness of the display when the display screen output brightness value calculated by the calculating module is inconsistent with the preset display screen output brightness value, and informing the obtaining module to obtain the red light characteristic value, the green light characteristic value and the blue light characteristic value again until the display screen output brightness value calculated by the calculating module is consistent with the preset display screen output brightness value;
the method for training the functional relation between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen comprises the following steps:
acquiring a plurality of groups of actual output brightness values of a display screen in a certain area under different backlight brightness and different environmental temperatures and corresponding red light characteristic values, green light characteristic values and blue light characteristic values;
and training the functional relation between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen according to the obtained actual output brightness value and the corresponding red light characteristic value, green light characteristic value and blue light characteristic value.
7. The apparatus of claim 6, wherein the display backlight brightness at the time of the display power-on is provided based on the preset display screen output brightness value.
8. The apparatus of claim 6, wherein the region is a center region of a display screen.
9. The apparatus of claim 6, wherein the fitting parameters a, b and c are derived using a least squares method such that (SLv-PLv)2Minimum, where PLv is the actual brightness value measured.
10. The apparatus of wherein the obtaining of the red, green and blue light characteristics of the red, green and blue light spectra comprises obtaining the red, green and blue light characteristics on the back and/or the red, green and blue light characteristics on the front of the display screen.
11, an electronic device for controlling the output brightness of a display screen, comprising:
the detection module is used for detecting a red light characteristic value of a red light spectrum, a green light characteristic value of a green light spectrum and a blue light characteristic value of a blue light spectrum;
the control module is connected with the detection module, can acquire the red light characteristic value, the green light characteristic value and the blue light characteristic value detected by the detection module from the detection module, can calculate the output brightness value of the display screen according to the red light characteristic value, the green light characteristic value and the blue light characteristic value detected by the detection module based on the functional relation between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen, judges whether the calculated output brightness value of the display screen is consistent with the preset output brightness value of the display screen, adjusts the backlight brightness of the display when judging that the output brightness value of the display screen corresponding to the red light characteristic value, the green light characteristic value and the blue light characteristic value is not consistent with the preset output brightness value of the display screen, and informs the detection module of carrying out the detection again; the expression of the functional relationship is: SLv ═ a × X + b × Y + c × Z; wherein SLv represents the output brightness of a display screen, X represents a red light characteristic value, Y represents a green light characteristic value, Z represents a blue light characteristic value, and a, b and c are fitting parameters;
the method for training the functional relation between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen comprises the following steps:
acquiring a plurality of groups of actual output brightness values of a display screen in a certain area under different backlight brightness and different environmental temperatures and corresponding red light characteristic values, green light characteristic values and blue light characteristic values;
and training the functional relation between the red light characteristic value, the green light characteristic value and the blue light characteristic value and the output brightness value of the display screen according to the obtained actual output brightness value and the corresponding red light characteristic value, green light characteristic value and blue light characteristic value.
12. The electronic device of claim 11, wherein the display backlight brightness at display power-on is provided based on the preset display screen output brightness value.
13. The electronic device of claim 11, wherein the region is a center region of a display screen.
14. Electronic device according to claim 11, characterized in that the fitting parameters a, b and c are derived using the least squares method such that (SLv-PLv)2Minimum, where PLv is the actual brightness value measured.
15. The electronic device of , wherein the detection module is located on the back side of the display screen and/or on the front side of the display screen.
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| CN110087068B (en) * | 2019-06-05 | 2021-06-08 | 歌尔光学科技有限公司 | Image brightness measuring method, device, equipment and computer readable storage medium |
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| CN101697273B (en) * | 2009-10-29 | 2012-09-19 | 彩虹集团公司 | LCD luminance uniformity automatic correcting system and method for LED backlight |
| CN204155591U (en) * | 2014-08-21 | 2015-02-11 | 深圳市奥拓电子股份有限公司 | LED display Automatic white balance brightness regulating structure |
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