CN107665694B - Brightness adjusting method and system of display device - Google Patents
Brightness adjusting method and system of display device Download PDFInfo
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Abstract
The disclosure relates to a brightness adjusting method and system of a display device, and belongs to the technical field of electronic displays. The method comprises the following steps: receiving a first parameter corresponding to the sliding bar for adjusting the overall brightness of the display screen; when the gray scale value of the first parameter is in a preset first interval range, calling a first brightness adjusting mode to adjust the brightness of the display screen; and when the gray scale value of the first parameter is in a preset second interval range, calling a second brightness adjusting mode to adjust the brightness of the display screen. The invention can realize smooth adjustment of the screen brightness of the self-luminous device.
Description
Technical Field
The present disclosure relates to electronic display technologies, and in particular, to a method and a system for adjusting brightness of a display device.
Background
When the traditional mobile phone system is used for adjusting the overall brightness, the level parameters are transmitted to a bottom layer control program through dimming bar, and the brightness is adjusted by changing the backlight voltage. The dimming bar is a sliding bar for adjusting the overall brightness of the mobile phone in the mobile phone ' setting ' -brightness ', and the level parameter is a parameter corresponding to the sliding bar.
The current software setting of the mobile phone system is for the LCD, because the OLED and AMOLED display screens (panels) belong to self-luminous devices, there is no backlight, and there is a certain difference in the adjustment mode, and there is no specific brightness adjustment function (function) developed specially for the characteristics of the OLED and AMOLED in the prior art, therefore when the black insertion function is added, some jitter and jitter phenomena are caused when displaying images due to the difference of analog and digital bits.
Therefore, a new method and system for adjusting the brightness of the display device are needed.
The above information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not constitute prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
The present disclosure provides a brightness adjustment method and system for a display device, which can make a brightness adjustment curve of a self-luminous device smoother.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows, or in part will be obvious from the description, or may be learned by practice of the disclosure.
According to an aspect of the present disclosure, there is provided a brightness adjustment method of a display device including a display screen, including: receiving a first parameter corresponding to the sliding bar for adjusting the overall brightness of the display screen; when the gray scale value of the first parameter is in a preset first interval range, calling a first brightness adjusting mode to adjust the brightness of the display screen; and when the gray scale value of the first parameter is in a preset second interval range, calling a second brightness adjusting mode to adjust the brightness of the display screen.
According to an embodiment of the present disclosure, the first brightness adjustment mode calculates a corresponding value of a register according to the gray-scale value of the first parameter to adjust the brightness of the display screen.
According to an embodiment of the present disclosure, the second brightness adjustment mode is to keep the gray scale value of the first parameter, obtain the corresponding brightness parameter according to the first parameter, and enter a black insertion mode through a control signal of the display device to achieve the brightness parameter.
According to an embodiment of the present disclosure, the step of entering the black insertion mode by the control signal of the display device to achieve the brightness parameter includes: setting the black insertion quantity of each frame of the control signal in a driving initialization program of the display screen; setting the duty ratio of the control signal to the brightness parameter in a backlight adjustment function of the display screen.
According to an embodiment of the present disclosure, the method further includes: and when the gray scale value of the first parameter is in a preset third interval range, calling a third brightness adjusting mode to adjust the brightness of the display screen.
According to an embodiment of the present disclosure, the method further includes: and when the gray scale value of the first parameter is in a preset fourth interval range, calling a fourth brightness adjusting mode to adjust the brightness of the display screen.
According to an embodiment of the present disclosure, the number of gray levels of the first parameter is 256 gray levels from 0 to 255, and the first interval is (10, 64%).
According to an embodiment of the present disclosure, the second interval ranges are (64,128] and (192,255).
According to an embodiment of the present disclosure, the number of gray levels of the first parameter is 256 gray levels from 0 to 255, and the third interval is (128,192).
According to an embodiment of the present disclosure, the number of gray scales of the first parameter is 256 gray scales from 0 to 255, and the fourth interval range is greater than 255 or less than 10.
According to an embodiment of the present disclosure, the receiving the first parameter corresponding to a slider for adjusting the overall brightness of the display screen includes: transmitting the first parameter to a bottom layer control program of the display device through a sliding bar for sliding and adjusting the overall brightness of the display screen; the bottom layer control program transmits the first parameter to a driving chip of the display device; and the driving chip controls the register through the time schedule controller to realize the brightness adjustment of the display screen.
According to an embodiment of the present disclosure, the display device is a self-light emitting device, and the control signal is an STE signal for controlling the brightness of the display screen.
According to another aspect of the embodiments of the present disclosure, there is provided a brightness adjustment system of a display device including a display screen, including: the receiving module is used for receiving a first parameter corresponding to the sliding bar for adjusting the integral brightness of the display screen; the first brightness adjusting module is used for calling a first brightness adjusting mode to adjust the brightness of the display screen when the gray scale value of the first parameter is in a preset first interval range; and the second brightness adjusting module is used for calling a second brightness adjusting mode to adjust the brightness of the display screen when the gray scale value of the first parameter is in a preset second interval range.
According to an embodiment of the present disclosure, the second brightness adjustment mode is to keep the gray scale value of the first parameter, obtain the corresponding brightness parameter according to the first parameter, and enter a black insertion mode through a control signal of the display device to achieve the brightness parameter, and the second brightness adjustment module includes: the black insertion quantity setting unit is used for setting the black insertion quantity of each frame of the control signal in a driving initialization program of the display screen; and the duty ratio adjusting unit is used for setting the duty ratio of the control signal in a backlight adjusting function of the display screen to reach the brightness parameter.
According to an embodiment of the present disclosure, the method further includes: and the third brightness adjusting module is used for calling a third brightness adjusting mode to adjust the brightness of the display screen when the gray scale value of the first parameter is in a preset third interval range.
According to an embodiment of the present disclosure, the method further includes: and the fourth brightness adjusting module is used for calling a fourth brightness adjusting mode to adjust the brightness of the display screen when the gray scale value of the first parameter is in a preset fourth interval range.
According to the brightness adjustment method and system of the display device, smooth transition of brightness adjustment of the self-luminous device is realized in a mode of combining general brightness adjustment and black insertion setting of the brightness adjustment control signal.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 schematically illustrates a flowchart of a brightness adjustment method of a display device according to an example embodiment of the present disclosure;
fig. 2 schematically illustrates a flowchart of a brightness adjustment method of a display device according to an example embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a brightness adjustment curve without black insertion;
FIG. 4A is a timing diagram of brightness adjustment without black frame insertion;
FIG. 4B is a timing diagram of brightness adjustment during black frame insertion;
FIG. 5 is a graph illustrating a brightness adjustment curve after black insertion without using the brightness adjustment method of the display device of the present disclosure;
fig. 6 is a diagram schematically illustrating a luminance adjustment curve based on the luminance adjustment method of the display apparatus of fig. 2;
fig. 7 schematically illustrates a block diagram of a brightness adjustment system of a display device according to an example embodiment of the present disclosure;
fig. 8 schematically illustrates a block diagram of a brightness adjustment system of a display device according to an example embodiment of the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Fig. 1 schematically illustrates a flowchart of a brightness adjustment method of a display device according to an example embodiment of the present disclosure.
As shown in fig. 1, in step S110, a first parameter corresponding to a slider for adjusting the overall brightness of the display screen is received.
In an exemplary embodiment, the receiving a first parameter corresponding to a slider for adjusting the overall brightness of the display screen includes: transmitting the first parameter to a bottom layer control program of the display device through a sliding bar for sliding and adjusting the overall brightness of the display screen; the bottom layer control program transmits the first parameter to a driving chip of the display device; the driving chip controls the register through the time schedule controller to realize the brightness adjustment of the display screen.
For example, the user opens "setting" - > "brightness" in the mobile phone, slides the sliding bar dimming bar in the mobile phone for adjusting the overall brightness of the mobile phone, and the level parameter corresponding to the sliding bar is the first parameter.
In step S120, when the gray-scale value of the first parameter is within a preset first interval range, a first brightness adjustment mode is invoked to adjust the brightness of the display screen.
In an exemplary embodiment, the first brightness adjustment mode calculates a corresponding value of a register to adjust the brightness of the display screen according to the gray scale value of the first parameter.
In an exemplary embodiment, wherein the number of gradations of the first parameter is 256 gradations from 0 to 255, the first interval is (10,64 ].
The colors displayed by the display are combined by different gray levels of the three primary RGB sub-pixels, and the variation of the gray level of each sub-pixel is known as "gray level". For a 16.7M-bit color 8-bit panel, the sub-pixels can exhibit a gradation level of 256 (i.e., 8 powers of 2), i.e., 256 gray levels. The three primary color sub-pixels with different gray levels form 16.7M color pixels, and the color pixels form the color picture of the screen.
In step S130, when the gray-scale value of the first parameter is within a preset second interval range, a second brightness adjustment mode is invoked to adjust the brightness of the display screen.
The reciprocal of the Frame rate is the Frame period Tf, for example, the Frame rate is 60Hz and the Frame period is 1/60sec, ideally, the whole Frame period Tf can be used to light the display panel, but considering the synchronization or under the scanning application or the circuit limitation, there will be some time that is not available to emit light in the whole Frame period Tf actually, the non-emitting time is defined as Toff, and the emitting time in the Frame period Tf is defined as T, the fixed current I is used in the emitting time T and the percentage of the emitting time to the emitting time is adjusted, the intensity of the emitting light (gray scale) can be adjusted, the general display defines n-bit gray scale, that is, the emitting time T is divided into n-th power gray scale equal parts of 2 or (2^ n-1) gray scales, the time length of each gray scale equal part is T1, T1 is T/(2^ n) or T/(2^ n-1), and determines the intensity of light emission by determining several gray scale equal parts to be emitted according to the value of n-bit gray scale signal (or called brightness data) D [ n-1:0 ].
In the embodiment of the present invention, the intensity of light emission is determined by determining the number of gray scale equal parts to be emitted only by the value of the 8-bit gray scale signal D [7:0], but the present invention is not limited thereto, and the corresponding number of bits can be specifically selected according to the requirements of the system.
For example: the ideal 4-bit gray scale, i.e. n is 4, and T is Tf, the light-emitting time T is divided into 2^4 ^ 16 gray scale equal parts, each gray scale equal part time T1 is 1/16T, the brightness setting value is represented by D [4-1:0] ═ D [3:0], and when D [3:0] ═ 0001, the light is emitted for a time T1, so as to obtain the brightness of 1/16 with the maximum brightness. Similarly, when D [3:0] ═ 0010, light is emitted for two times T1, to obtain 2/16 of maximum brightness, and so on to 15/16 of maximum brightness. Similarly, if the light-emitting time T is divided into 2^4-1 ^ 15 gray-scale equal parts, each gray-scale equal part time T1 ^ 1/15 ^ T, the brightness setting value is represented by D [3:0], when D [3:0] - > 0001, the light is emitted for a time T1 to obtain the brightness of 1/15 of the maximum brightness, and so on to 15/15 of the maximum brightness.
The driving circuit of the display device is used for generating driving current within the luminous time according to the gray scale signal so as to drive the display panel to emit light. Wherein the gray scale signal has n bits, n is a positive integer greater than 1, and the light-emitting time is divided into 2^ n or (2^ n-1) gray scale equally-divided times.
The driving circuit is used for generating a driving current within the luminous time according to the gray scale signal representing the brightness data so as to drive the display panel to emit light. For the application of n-bit gray scale, the gray scale signal is represented by n bits of binary signal, n is a positive integer greater than 1, and the gray scale signal (or called as brightness setting value) is defined as D [ n-1:0] to represent the gray scale (or brightness) of the display panel. The light-emission time T within the frame period Tf is divided into 2^ n gray scale equal parts or (2^ n-1) gray scale equal parts, each of which is T1 ^ T/(2^ n) or T/(2^ n-1). For the case where the light-emission time T is divided into (2^ n-1) gray-scale equal parts and each gray-scale equal part time T1 ^ T/(2^ n-1), the principle is similar, and the difference is only that the light-emission time T is divided into the equal parts less than one (i.e. the difference between 2^ n and (2^ n-1) is only one divided equal part), and the principle of signal setting is approximately the same as the principle.
In an exemplary embodiment, wherein the second range of intervals is (64,128] and (192,255 ].
In an exemplary embodiment, the second brightness adjustment mode is to keep the gray scale value of the first parameter, obtain the corresponding brightness parameter according to the first parameter, and enter the black insertion mode through a control signal of the display device to achieve the brightness parameter. The black insertion refers to that several groups of black pictures are fixedly transmitted in a frame of pictures to improve the low gray level mura phenomenon. mura is a class of bright and dark spots.
In an exemplary embodiment, the reaching of the brightness parameter by a control signal of the display device entering a black insertion mode includes: setting the black insertion quantity of each frame of the control signal in a driving initialization program of the display screen; setting the duty ratio of the control signal to the brightness parameter in a backlight adjustment function of the display screen.
The black insertion technique mainly utilizes the presentation of black pictures to eliminate the integration effect of human eyes.
In the driving initialization program, the sliding dimming bar modifies the level parameter, and the STE is more finely changed in the black insertion adjustment process through an algorithm, so that an adjustment parameter is added, the brightness adjustment and the black insertion of a normal AMOLED (organic light Emitting Diode) or OLED (organic light Emitting Diode) simultaneously affect the brightness of a screen, and a brightness adjustment curve becomes smoother.
For example, through the adjustment of the mobile phone system software, the connection of the brightness adjustment curve with the black insertion function is smoother, and the low-gray-scale jitter disappears. The underlying implementation of both brightness adjustment and black insertion can be implemented in the LCM initial part, where black insertion sets the number of black insertions per frame, and the STE on duty cycle is inserted in the backlight setting function. In order to solve the problems of brightness jitter and non-uniformity, an algorithm is added into the backlight setting function, so that the change curve of the STE is smoother. Where LCM initial is the drive initialization program for the screen. The backlight setting function is a backlight adjusting function, and since android currently has no special program, the screen brightness adjustment of the OLED is directly realized in the original functional part. Because of the association to the upper application layer, direct modification of the bottom layer can be achieved. The specific value of the stem duty cycle is a range, and different driver chips have different requirements. For example, an a-chip may require a 50% duty cycle to achieve a 50nits luminance, but a B-chip may require a 60% duty cycle.
The lcd screen configuration is called LCM at Mtk. LCM _ initial, like its name, is primarily the initialization operation for the screen.
In a hardware driving part of a screen, an algorithm is needed to calculate the optimal matching proportion of the two modes, a large amount of tests are needed, and the debugging can be normally conducted if the debugging is successful.
In an exemplary embodiment, further comprising: and when the gray scale value of the first parameter is in a preset third interval range, calling a third brightness adjusting mode to adjust the brightness of the display screen.
In an exemplary embodiment, wherein the number of gray levels of the first parameter is 256 gray levels from 0 to 255, the third interval ranges from (128,192).
In an exemplary embodiment, further comprising: and when the gray scale value of the first parameter is in a preset fourth interval range, calling a fourth brightness adjusting mode to adjust the brightness of the display screen.
In an exemplary embodiment, wherein the number of gray levels of the first parameter is 256 gray levels from 0 to 255, the fourth interval ranges from more than 255 to less than 10.
In an exemplary embodiment, wherein the display device is a self-light emitting device, the control signal is an STE signal in the driving chip that controls brightness of the display screen.
The embodiment of the invention can be applied to all self-luminous devices such as AMOLED and OLED.
OLED display technology differs from conventional LCD display in that it does not require a backlight, and uses a very thin coating of organic material and a glass substrate, which emit light when current flows through them. Moreover, the OLED display screen can be made lighter and thinner, the visual angle is larger, and the electric energy can be obviously saved. OLED displays cannot be changed in brightness by adding or subtracting backlights as conventional LCD liquid crystal displays do. Since each pixel in the OLED screen emits light independently. The advantage of an OLED screen is that it may not be suitable for backlighting the screen, which may significantly improve image quality and increase battery life, but it becomes very difficult to change the screen brightness.
The OLED display screen comprises a main control module, a pixel array and a driving chip used for driving the pixel points to emit light, wherein the driving chip is respectively connected with the pixel array and the driving circuit, the main control module comprises a scanning module and a time adjusting module, the scanning module scans each pixel point to obtain the current and the voltage of each pixel point, the power of each pixel point in the pixel array is calculated according to the scanning result, the time adjusting module controls the driving module to adjust the light emitting time of each pixel point according to the power of each pixel point, and the adjusted light emitting time is in inverse proportion to the power.
The main control module can be realized by a single chip microcomputer, the driving module comprises a row driver and a column driver, the single chip microcomputer is connected with the row driver and the column driver, and the row driver and the column driver are connected with the OLED pixel array. The singlechip sends out a command, and the working voltage of the OLED enters the singlechip for A/D conversion after being selected by an A/D channel. The single chip microcomputer obtains the working voltage of the corresponding OLED pixel point. And finally, the singlechip calculates according to the acquired voltage or current, and adjusts the light-emitting time of each pixel point according to the calculation result.
Fig. 2 schematically illustrates a flowchart of a brightness adjustment method of a display device according to an example embodiment of the present disclosure.
As shown in fig. 2, in step S210, a level parameter corresponding to a slider for adjusting the overall brightness of the display screen is received.
The level parameters are divided into different intervals, for example, the division intervals are 192-. When the level parameter varies in different interval ranges, the following processing is performed.
In step S220, it is determined whether the level parameter is greater than 255 or less than 10. If yes, entering the next step; otherwise, the process goes to step S230.
In step S230, the fourth brightness adjustment mode is invoked to adjust the brightness of the display screen.
In an exemplary embodiment, the fourth brightness adjustment mode includes:
when level <10, i.e. the user slides the slider to turn the screen brightness down to below 10, the system keeps the screen brightness fixed and at the lowest setting of level-10. Because it is generally not recommended to set the brightness value too low, the user will not be able to easily see the screen to operate the mobile phone;
when the level is 255, because the level is 255, the maximum value of the mobile phone brightness gray scale, if the level is larger than the value due to abnormality, the system keeps the maximum brightness of 255.
In step S240, whether the level parameter is within the range of the (10, 64) interval is judged, if yes, the next step is carried out, otherwise, the step S260 is skipped.
In step S250, the first brightness adjustment mode is invoked to adjust the brightness of the display screen.
In an exemplary embodiment, the first brightness adjustment mode includes:
when the level is lower than 64, the corresponding brightness is already low to a range where the human eye is sensitive, and at this time, if the screen brightness is adjusted by black insertion, the human eye will feel a shaking sensation, so that the brightness adjustment needs to be performed by returning to the normal mode (i.e. the mode that the screen brightness is changed by sliding the sliding bar, which is usually used).
In step S260, whether the level parameter is within the range of (64, 128) or (192,255) is judged, if yes, the next step is carried out, otherwise, the step S280 is skipped.
In step S270, the second brightness adjustment mode is invoked to adjust the brightness of the display screen.
In an exemplary embodiment, the second brightness adjustment mode includes:
when 192< level < ═ 255, the range is the brightest part of the screen, and black insertion is selected to realize brightness adjustment in the part in consideration of the visual difference between black insertion and normal mode brightness adjustment, the method specifically comprises the following steps:
keeping other parameters influencing the brightness unchanged, in particular to a 51 register when the brightness is adjusted in a normal mode; calculating a setting value corresponding to a sliding bar of the current client to obtain a corresponding brightness parameter; entering a black insertion mode, and measuring the pulse width of the STE control signal for black insertion by an instrument to reach the target brightness; the current state is kept unchanged.
The brightness change value caused by black insertion is step-like, and jitter appears in a region sensitive to low gray scales, but cannot be sensed by human eyes at high gray scales. In the normal brightness adjustment mode, the brightness change is linear, and the method is more suitable for low gray scale adjustment.
Similarly, when 64< level < ═ 128, the luminance continues to be adjusted in a black-inserted manner in this luminance range:
keeping other parameters influencing the brightness unchanged, in particular to a 51 register when the brightness is adjusted in a normal mode; calculating the setting value of the current client to obtain a corresponding brightness parameter; entering a black insertion mode, and measuring the STE pulse width of black insertion by an instrument to reach the target brightness; the current state is kept unchanged.
In step S280, whether the level parameter is within the range of (128,192) is judged, if yes, the next step is carried out, otherwise, the step S2100 is skipped.
In step S290, the third brightness adjustment mode is invoked to adjust the brightness of the display screen.
In an exemplary embodiment, the third brightness adjustment mode includes:
when 128< level < ═ 192, to ensure the smoothness of the luminance change curve, the STE pulse width adjustment is not performed in this range: keeping the STE pulse width unchanged in order for STE not to affect the next operation; obtaining a level value, calculating 51 a corresponding value of a register (the same as an LCD mode and a common mode), and adjusting the screen brightness; 51 the register parameter values are unchanged.
In step S2100, the process ends.
Fig. 3 is a schematic diagram of a brightness adjustment curve without black insertion.
In the example of 256 gray scales with the luminance of 0-255, the abscissa of fig. 3 is the number of gray scales, and the ordinate is the luminance variation parameter. The relationship between the gray scale number and the brightness change parameter is that the smoother the curve is, the more uniform the brightness change is, and both of them will affect the curve.
Under the condition of no black insertion, the brightness adjustment curve is smooth as shown by Fun-1, and the brightness change is smooth without shaking or jumping feeling when the dimming bar is slid. But this approach cannot avoid some mura phenomenon of AMOLEDs and OLEDs at low gray scales. The mura phenomenon is complicated and is generally seen easily at low gray levels due to process problems. In the embodiment of the present invention, the gray levels are relatively high and low.
Fig. 4A is a timing chart of luminance adjustment when no black frame is inserted.
The display device mainly comprises a display panel, a source electrode driver, a grid electrode driver and a time schedule controller. The timing control signal output by the timing controller mainly comprises STV/STE signals and the like. STV and STE are control signals for AMOLED and OLED. The STV signal is a field sync signal, i.e. a start signal of each frame of image, and each frame of image has a corresponding pulse in the signal. STE is one of control signals for controlling screen brightness inside the driver chip, and can be changed by a register.
Fig. 4B is a timing chart of luminance adjustment during black frame insertion.
To optimize this problem, the STE black frame insertion method is combined with the brightness adjustment of the level parameter, as shown in FIG. 4B. The traditional voltage adjusting mode is an analog mode, is uniformly changed and can realize smooth transition of voltage, but black insertion is actually adjusted in a digital mode and is relatively jumped to change, and brightness is actually changed in a step mode, so when the brightness adjustment is integrated into the black insertion mode, brightness changes at a joint position and a low gray level position are large, the brightness is not uniformly transited but jumped by shaking, and a user can feel that a screen is flickering instead of uniform natural transition. The brightness adjustment curve at this time is Fun-4.
Fig. 5 is a schematic diagram of a brightness adjustment curve after black insertion without using the brightness adjustment method of the display device of the present disclosure. Fig. 6 schematically shows a luminance adjustment curve diagram based on the luminance adjustment method of the display device of fig. 2. The adjusted result is Fun-5, for example, and the comparison with Fun-4 shows that the brightness adjustment curve is much smoother.
Fig. 7 schematically illustrates a block diagram of a brightness adjustment system of a display device according to an example embodiment of the present disclosure.
As shown in fig. 7, the system includes: the receiving module 710 is configured to receive a first parameter corresponding to a slider for adjusting the overall brightness of the display screen; a first brightness adjusting module 720, configured to adjust the brightness of the display screen by using a first brightness adjusting mode when the gray scale value of the first parameter is within a preset first interval range; the second brightness adjusting module 730 is configured to invoke a second brightness adjusting mode to adjust the brightness of the display screen when the gray scale value of the first parameter is within a preset second interval range.
In an exemplary embodiment, the second brightness adjustment mode is to maintain a gray scale value of the first parameter, obtain a corresponding brightness parameter according to the first parameter, and enter a black insertion mode through a control signal of the display device to achieve the brightness parameter, and the second brightness adjustment module includes: the black insertion quantity setting unit is used for setting the black insertion quantity of each frame of the control signal in a driving initialization program of the display screen; and the duty ratio adjusting unit is used for setting the duty ratio of the control signal in a backlight adjusting function of the display screen to reach the brightness parameter.
In an exemplary embodiment, further comprising: and the third brightness adjusting module is used for calling a third brightness adjusting mode to adjust the brightness of the display screen when the gray scale value of the first parameter is in a preset third interval range.
In an exemplary embodiment, further comprising: and the fourth brightness adjusting module is used for calling a fourth brightness adjusting mode to adjust the brightness of the display screen when the gray scale value of the first parameter is in a preset fourth interval range.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
The brightness adjusting system of the display device provided by the embodiment of the disclosure has a flexible solution, can continuously perfect the correction effect by improving software, and can adjust the algorithm and parameters by refreshing the software even after the display screen leaves a factory, so that the display screen works in a state close to an ideal state. The display unit can be not changed, and the manufacturing process and cost of the display screen can not be improved.
Fig. 8 schematically illustrates a block diagram of a brightness adjustment system of a display device according to an example embodiment of the present disclosure.
As shown in fig. 8, the apparatus 800 includes: a processor 802; a memory 804 for storing instructions executable by the processor 802.
The processor 802 may be configured to: receiving a first parameter corresponding to the sliding bar for adjusting the overall brightness of the display screen; when the gray scale value of the first parameter is in a preset first interval range, calling a first brightness adjusting mode to adjust the brightness of the display screen; and when the gray scale value of the first parameter is in a preset second interval range, calling a second brightness adjusting mode to adjust the brightness of the display screen.
For example, the apparatus 800 may be a smartphone, computer, digital broadcast terminal, messaging device, game console, tablet device, medical device, fitness device, personal digital assistant, and the like.
Referring to fig. 8, the apparatus 800 may include one or more of the following components: processing components 801, memory 804, power components 805, multimedia components 806, audio components 807, input/output (I/O) interfaces 803, sensor components 809, and communication components 808.
The processing component 801 generally controls overall operation of the device 800, such as operations associated with display, data communication, camera operations, and recording operations. The processing components 801 may include one or more processors 802 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 801 may include one or more modules that facilitate interaction between the processing component 801 and other components. For example, the processing component 801 may include a multimedia module to facilitate interaction between the multimedia component 806 and the processing component 801.
The memory 804 is configured to store various types of data to support operation at the device 800. Examples of such data include instructions, messages, pictures, videos, etc. for any application or method operating on device 800. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The power supply component 805 provides power to the various components of the device 800. The power components 805 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 800.
The multimedia component 806 includes a screen that provides an output interface between the device 800 and a user. In some embodiments, the screen may include AMOLEDs and OLEDs. If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 806 includes a front facing camera and/or a rear facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the device 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 807 is configured to output and/or input audio signals. For example, audio component 807 includes a Microphone (MIC) configured to receive external audio signals when apparatus 800 is in operating modes, such as call mode, record mode, and speech recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 808. In some embodiments, audio component 807 also includes a speaker for outputting audio signals.
The I/O interface 803 provides an interface between the processing component 801 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The communication component 808 is configured to facilitate communications between the apparatus 800 and other devices in a wired or wireless manner. The device 800 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 808 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 808 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.
In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 804 comprising instructions, executable by the processor 802 of the apparatus 800 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
A non-transitory computer-readable storage medium in which instructions, when executed by a processor of a mobile terminal, enable the mobile terminal to perform a method of brightness adjustment of a display device, the method comprising:
receiving a first parameter corresponding to the sliding bar for adjusting the overall brightness of the display screen; when the gray scale value of the first parameter is in a preset first interval range, calling a first brightness adjusting mode to adjust the brightness of the display screen; and when the gray scale value of the first parameter is in a preset second interval range, calling a second brightness adjusting mode to adjust the brightness of the display screen.
For other contents in the embodiments of the present invention, reference is made to the contents in the above embodiments of the present invention, and further description is omitted here.
Fig. 1 and 2 illustrate a flowchart of a brightness adjustment method of a display device according to an example embodiment of the present disclosure. The method may be implemented, for example, using a brightness adjustment system of a display device as shown in fig. 7 or 8, but the present disclosure is not limited thereto. It should be noted that fig. 1 and 2 are merely schematic illustrations of processes included in methods according to example embodiments of the present disclosure, and are not intended to be limiting. It will be readily appreciated that the processes shown in fig. 1 and 2 are not intended to indicate or limit the temporal order of these processes. In addition, it will also be readily appreciated that such processing may be performed, for example, synchronously or asynchronously across multiple modules/processes/threads.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which may be a personal computer, a server, a mobile terminal, or a network device, etc.) to execute the method according to the embodiments of the present disclosure.
According to the brightness adjusting method and system of the display device, aiming at the characteristics of the self-luminous device such as an AMOLED or an OLED, the brightness adjusting curve with the black insertion function is connected more smoothly through system software adjustment, and low gray level jitter disappears.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (13)
1. A method for adjusting brightness of a display device, the display device including a display screen, comprising:
receiving a first parameter corresponding to the sliding bar for adjusting the overall brightness of the display screen;
when the gray scale value of the first parameter is in a preset first interval range, calling a first brightness adjusting mode to adjust the brightness of the display screen; and
when the gray scale value of the first parameter is in a preset second interval range, calling a second brightness adjusting mode to adjust the brightness of the display screen;
the second brightness adjusting mode is to keep the gray scale value of the first parameter, obtain the corresponding brightness parameter according to the first parameter, and enter a black insertion mode through a control signal of the display device to achieve the brightness parameter;
the step of entering the black insertion mode by the control signal of the display device to reach the brightness parameter comprises:
setting the black insertion quantity of each frame of the control signal in a driving initialization program of the display screen;
setting the duty ratio of the control signal to the brightness parameter in a backlight adjustment function of the display screen.
2. The method as claimed in claim 1, wherein the first brightness adjustment mode is to calculate a corresponding value of a register according to the gray-scale value of the first parameter to adjust the brightness of the display screen.
3. The method of claim 1, further comprising: when the gray scale value of the first parameter is in a preset third interval range, calling a third brightness adjusting mode to adjust the brightness of the display screen;
the third brightness adjustment mode includes:
keeping the STE pulse width unchanged, and calculating a corresponding value of a register according to the gray scale value of the first parameter so as to adjust the brightness of the display screen.
4. The method of claim 1, further comprising: when the gray scale value of the first parameter is in a preset fourth interval range, calling a fourth brightness adjusting mode to adjust the brightness of the display screen;
the fourth brightness adjustment mode includes:
when the gray scale value of the first parameter is less than 10, keeping the brightness of a display screen constant, and keeping the gray scale value of the first parameter equal to the lowest setting value of 10;
when the gray scale value of the first parameter is larger than 255, the maximum brightness of the display screen is kept to be 255.
5. The method of claim 1, wherein the first parameter has a gray scale number of 256 gray scales from 0 to 255, and the first interval is (10, 64%).
6. The method of claim 5, wherein the second range of intervals is (64,128] and (192,255 ].
7. The method of claim 3, wherein the first parameter has a gray scale number of 256 gray scales from 0-255, and the third interval is (128,192).
8. The method of claim 4, wherein the number of gray levels of the first parameter is 256 gray levels from 0 to 255, and the fourth interval is greater than 255 or less than 10.
9. The method of claim 1, wherein the step of receiving the first parameter corresponding to a slider for adjusting the overall brightness of the display screen comprises:
transmitting the first parameter to a bottom layer control program of the display device through a sliding bar for sliding and adjusting the overall brightness of the display screen;
the bottom layer control program transmits the first parameter to a driving chip of the display device; and
the driving chip controls the register through the time schedule controller to realize the brightness adjustment of the display screen.
10. The method of claim 1, wherein the display device is a self-light emitting device, and the control signal is an STE signal for controlling the brightness of the display screen.
11. A brightness adjustment system for a display device, the display device including a display screen, comprising:
the receiving module is used for receiving a first parameter corresponding to the sliding bar for adjusting the integral brightness of the display screen;
the first brightness adjusting module is used for calling a first brightness adjusting mode to adjust the brightness of the display screen when the gray scale value of the first parameter is in a preset first interval range; and
the second brightness adjusting module is used for calling a second brightness adjusting mode to adjust the brightness of the display screen when the gray scale value of the first parameter is in a preset second interval range;
the second brightness adjusting mode is to keep the gray scale value of the first parameter, obtain the corresponding brightness parameter according to the first parameter, and enter a black insertion mode through a control signal of the display device to achieve the brightness parameter;
the second brightness adjustment module includes:
the black insertion quantity setting unit is used for setting the black insertion quantity of each frame of the control signal in a driving initialization program of the display screen;
and the duty ratio adjusting unit is used for setting the duty ratio of the control signal in a backlight adjusting function of the display screen to reach the brightness parameter.
12. The system of claim 11, further comprising: the third brightness adjusting module is used for calling a third brightness adjusting mode to adjust the brightness of the display screen when the gray scale value of the first parameter is in a preset third interval range;
the third brightness adjustment mode includes:
keeping the STE pulse width unchanged, and calculating a corresponding value of a register according to the gray scale value of the first parameter so as to adjust the brightness of the display screen.
13. The system of claim 11, further comprising: the fourth brightness adjusting module is used for calling a fourth brightness adjusting mode to adjust the brightness of the display screen when the gray scale value of the first parameter is in a preset fourth interval range;
the fourth brightness adjustment mode includes:
when the gray scale value of the first parameter is less than 10, keeping the brightness of a display screen constant, and keeping the gray scale value of the first parameter equal to the lowest setting value of 10;
when the gray scale value of the first parameter is larger than 255, the maximum brightness of the display screen is kept to be 255.
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| CN110554734A (en) * | 2018-05-31 | 2019-12-10 | 中兴通讯股份有限公司 | Display screen adjusting method and device and computer readable storage medium |
| CN111897569B (en) * | 2020-07-13 | 2024-04-16 | 深圳市亿道数码技术有限公司 | Processing method and system for mobile terminal configuration device based on MTK platform |
| CN113299247B (en) * | 2021-06-08 | 2022-01-07 | 广州文石信息科技有限公司 | Method and related device for optimizing display effect of color electronic ink screen |
| CN117153075A (en) * | 2022-05-30 | 2023-12-01 | 荣耀终端有限公司 | Screen brightness adjusting method, electronic device and computer readable storage medium |
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| CN100526943C (en) * | 2006-12-31 | 2009-08-12 | 晶宏半导体股份有限公司 | Display device |
| CN101281741B (en) * | 2007-04-03 | 2010-06-16 | 中华映管股份有限公司 | Apparatus and method for displaying dynamic menu |
| JP5037221B2 (en) * | 2007-05-18 | 2012-09-26 | 株式会社半導体エネルギー研究所 | Liquid crystal display device and electronic device |
| US9064451B2 (en) * | 2012-02-01 | 2015-06-23 | Apple Inc. | Organic light emitting diode display having photodiodes |
| CN103077696B (en) * | 2013-01-15 | 2015-08-12 | Opera软件股份公司 | For regulating method and apparatus and the display system of brightness of display screen |
| KR20150049045A (en) * | 2013-10-29 | 2015-05-08 | 삼성전자주식회사 | Method and apparautus for controlling the brightness of the screen in portable device |
| CN104217704A (en) * | 2014-08-26 | 2014-12-17 | 小米科技有限责任公司 | Backlight brightness control method and device |
| US9478157B2 (en) * | 2014-11-17 | 2016-10-25 | Apple Inc. | Ambient light adaptive displays |
| CN104935725B (en) * | 2015-04-23 | 2016-07-27 | 努比亚技术有限公司 | Mobile terminal and utilize the method that virtual frame region realizes function point analysis |
| CN104916270B (en) * | 2015-05-29 | 2019-04-05 | 努比亚技术有限公司 | A kind of method and apparatus adjusting screen intensity |
| CN105355188B (en) * | 2015-11-23 | 2018-09-11 | 广东欧珀移动通信有限公司 | Screen brightness regulation method, system and the mobile terminal of mobile terminal |
| CN105528999B (en) * | 2016-01-15 | 2018-05-08 | 合一智能科技（深圳）有限公司 | The display control method and device of liquid crystal display |
| CN105551442B (en) * | 2016-02-02 | 2018-12-11 | 广东欧珀移动通信有限公司 | The adjusting method and device of backlight illumination |
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