WO2019001157A1 - 显示屏调光方法、装置、存储介质及电子设备 - Google Patents
显示屏调光方法、装置、存储介质及电子设备 Download PDFInfo
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- WO2019001157A1 WO2019001157A1 PCT/CN2018/086764 CN2018086764W WO2019001157A1 WO 2019001157 A1 WO2019001157 A1 WO 2019001157A1 CN 2018086764 W CN2018086764 W CN 2018086764W WO 2019001157 A1 WO2019001157 A1 WO 2019001157A1
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- dimming
- display screen
- parameter value
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- dimming mode
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Definitions
- the present invention relates to the field of display technologies, and in particular, to a display screen dimming method, apparatus, storage medium, and electronic device.
- the display needs to have good dimming characteristics so that it can be viewed comfortably during day and night conditions.
- the conventional dimming technology may degrade the display quality during the dimming process, so how to reduce the influence on the display quality while dimming is an urgent problem to be solved.
- a display dimming method includes:
- the display screen drives a pixel using a thin film transistor
- comparing the parameter value with the set threshold, and selecting the corresponding dimming mode according to the comparison result to dim the display screen includes:
- the first type of dimming mode is used to dim the display screen; the first type of dimming mode does not change the display screen during the dimming process.
- the voltage of the data signal received by the pixel drive circuit is used to dim the display screen; the first type of dimming mode does not change the display screen during the dimming process.
- comparing the parameter value with the set threshold and selecting the corresponding dimming mode to dim the display according to the comparison result further includes:
- the second dimming mode When it is determined that the parameter value is not lower than the set threshold, the second dimming mode is adopted; the second dimming mode performs dimming by adjusting the voltage of the data signal.
- the second dimming method is a source dimming method.
- the first dimming mode dims by adjusting the illumination time of each frame in the display.
- the first dimming mode is an EM dimming mode.
- the parameter value is a brightness value.
- the set threshold is between 70 nits and 90 nits.
- a display dimming device comprising:
- a parameter value obtaining module configured to acquire a parameter value of the display screen to be adjusted; wherein the parameter value has a corresponding relationship with the brightness of the display screen;
- the dimming selection module is configured to compare the parameter value with a set threshold, and select a corresponding dimming mode according to the comparison result to dim the display screen.
- the display screen drives a pixel using a thin film transistor
- the dimming selection module includes:
- a first dimming selection unit configured to determine, when the brightness corresponding to the parameter value is lower than a set threshold, dimming the display screen by using a first dimming mode; The voltage of the data signal received by the pixel driving circuit in the display screen is not changed during the light process.
- a storage medium storing a program that, when executed by a processor, implements the following steps:
- An electronic device comprising a peripheral driving chip and a display screen; the peripheral driving chip comprising a memory and a processor, wherein the memory stores a program, when the program is executed by the processor, causing the processor to execute the following step:
- the parameter value is compared with the set threshold value, and the corresponding dimming mode is selected according to the comparison result.
- the screen is dimmed. Since various dimming methods have different effects under different brightnesses, if only one dimming mode is selected for dimming, the display quality is degraded when the brightness is not good in the dimming mode.
- the above-mentioned display screen dimming method selects the corresponding dimming mode according to the comparison result, and can improve the above-mentioned defects in which only one dimming mode is selected, thereby reducing the influence on the display quality while dimming.
- FIG. 1 is a flow chart of a display screen dimming method provided by an embodiment
- FIG. 2 is a specific flowchart of one embodiment of a display screen dimming method of the embodiment shown in FIG. 1;
- FIG. 3 is a circuit diagram of one embodiment of a pixel driving circuit according to the embodiment shown in FIG. 1;
- FIG. 4 is a flow chart of another embodiment of a display screen dimming method of the embodiment shown in FIG. 1;
- FIG. 5 is a block diagram of a display screen dimming device provided by another embodiment.
- the display screen can drive pixels using thin film transistors.
- the display screen includes, for example, a pixel matrix, a row driving circuit, and a column driving circuit.
- the pixel matrix includes a plurality of pixels and a plurality of pixel driving circuits, each of which is controlled by a pixel driving circuit.
- the row driver circuit transmits a scan signal to each pixel drive circuit through a row (scan) address bus.
- the column driver circuit transmits a data signal to each pixel driving circuit through a column (data) address bus.
- the peripheral driving chips are electrically connected to the row driving circuit and the column driving circuit, respectively, and are responsible for functions such as data processing, transmission, and control signal transmission of the entire display screen.
- the peripheral driving chip is composed of, for example, a single chip microcomputer (or FPGA) and peripheral circuits.
- the display screen dimming method provided by the embodiment includes the following content.
- step S100 a parameter value of the display screen to be adjusted is obtained.
- the parameter value has a corresponding relationship with the brightness of the display screen.
- the parameter value of the display screen to be adjusted refers to the adjustment of the parameter of the display screen to the parameter value.
- the parameter value has a corresponding relationship with the brightness of the display screen, which means that if the brightness changes, the parameter value also changes.
- the parameter values are, for example, a luminance value, a voltage value, a current value, and a gray scale.
- the parameter value can be set by the user through the interactive interface of the device where the display screen is located, and after the user setting is completed, the CPU value of the user sends the parameter value set by the user to the peripheral driving chip.
- the parameter value to be adjusted can also be automatically generated by the CPU or the peripheral driver chip (ie, has the function of automatic dimming), for example, if the parameter value is a brightness value, a light sensor for detecting the external light intensity can be set.
- the CPU or the peripheral driving chip correspondingly generates a brightness value suitable for the user to view according to the light intensity value detected by the light sensor, and uses the brightness value as the brightness value to be adjusted.
- step S200 the parameter value is compared with the set threshold, and the corresponding dimming mode is selected according to the comparison result to dim the display screen.
- different dimming modes can be selected.
- the dimming mode with better dimming effect is selected for dimming.
- the first dimming mode has an effect on the display quality when the parameter value is in the first range, and the effect on the display quality when the parameter value is in the second range, and the second dimming mode is in the parameter value.
- the second range is in the above range, the influence on the display quality is lower than the influence on the display quality when the parameter value is in the first range.
- the first dimming method is used. Dimming, if it is judged that the parameter value is in the second range, dimming is performed by the second dimming method described above, so that the display quality can be improved while dimming.
- the above-mentioned display screen dimming method selects the corresponding dimming mode according to the comparison result, and can improve the above-mentioned defects in which only one dimming mode is selected, thereby reducing the influence on the display quality while dimming.
- the display screen drives a pixel using a thin film transistor (TFT).
- TFT thin film transistor
- Step S210 When it is determined that the brightness corresponding to the parameter value is lower than the set threshold, the first type of dimming mode is adopted to dim the display screen.
- the first dimming mode does not change the voltage of the data signal received by the pixel driving circuit in the display during the dimming process.
- the set threshold is, for example, between 70 nits to 90 nits.
- the threshold is set to 80 nits.
- the pixel driving circuit includes a TFT tube T1, a TFT tube T2, a TFT tube T3, a capacitor C1, and a pixel D1.
- the gate and the drain of the TFT tube T1 are respectively connected to the row address bus and the column address bus.
- the signal received by the gate and the drain of the TFT tube T1 corresponds to a scan signal (Vscan) and a data signal (Vdata). Therefore, in the embodiment shown in FIG. 3, the first dimming mode does not change the voltage of the data signal received by the drain of the TFT tube T1 during the dimming process, but by changing other devices in the pixel driving circuit.
- the input signal is used for dimming.
- the dimming process if the dimming is performed by changing the voltage of the data signal, the lower the luminance value to be adjusted, the larger the voltage of the data signal needs to be, which causes the difference in characteristics of the TFT tube to be increased, thereby causing the screen body to appear.
- the phenomenon that the brightness in the row direction is uneven. Therefore, in this embodiment, when the brightness corresponding to the parameter value to be adjusted is lower than the set threshold, the first mode of dimming adopted does not perform dimming by changing the voltage of the data signal, but adopts other methods.
- the dimming can avoid the phenomenon that the brightness of the screen in the row direction is uneven due to the difference in the characteristics of the TFT tube, and the effect on the display quality can be further reduced while dimming.
- the step S200 further includes: when determining that the brightness corresponding to the parameter value is not lower than the set threshold, adopting a second dimming mode.
- the above step S200 specifically includes the following content, please refer to FIG. 4.
- step S211 it is determined whether the brightness corresponding to the parameter value is lower than the set threshold. If yes, step S212 is performed; otherwise, step S213 is performed.
- step S212 the first dimming mode is adopted.
- step S213 a second dimming mode is adopted.
- the second dimming mode performs dimming by adjusting the voltage of the data signal.
- the second dimming method is, for example, a source dimming method.
- the expression of the current of pixel D1 is:
- I oled k(VDD-Vdata) 2 (1)
- I oled is the current of the pixel D1
- k is a coefficient.
- the second dimming mode is switched to the first dimming mode, thereby avoiding the brightness of the screen line direction. Uneven phenomenon.
- the first dimming mode performs dimming by adjusting the pixel's illumination time at each frame.
- the first mode of dimming is EM dimming.
- reducing the illumination time of each frame can reduce the brightness of the pixel.
- the illumination time of each frame can be reduced by reducing the duty ratio of the active level (eg, low level) in the PWM signal, thereby reducing the brightness of the pixel.
- the pixel emits light only at an active level.
- the working principle of the above first dimming mode will be described by taking FIG. 3 as an example. If the first dimming mode is to be adopted, it is not necessary to change the data signal (Vdata), but only the duty ratio of the Vpwm signal applied to the gate of the TFT tube T3 is adjusted to change the lighting time of the pixel D1 in each frame. , you can adjust the brightness of the pixel D1.
- the dimming frequency is fixed, and at this time, the phenomenon of photographing scrolling may occur under high brightness conditions. Therefore, in this embodiment, if the parameter value to be adjusted is higher than the set threshold, the second dimming mode is adopted, thereby avoiding the defect of the above-mentioned photographing scrolling, and further improving the display quality.
- FIG. 1 , FIG. 2 and FIG. 4 are schematic flowcharts of a method according to an embodiment of the present invention. It should be understood that although the steps in the flowcharts of FIGS. 1, 2, and 4 are sequentially displayed in accordance with the indication of the arrows, these steps are not necessarily performed in the order indicated by the arrows. Except as explicitly stated herein, the execution of these steps is not strictly limited, and may be performed in other sequences. Moreover, at least some of the steps in FIGS. 1, 2, and 4 may include a plurality of sub-steps or stages, which are not necessarily performed at the same time, but may be executed at different times. The order of execution is not necessarily performed sequentially, but may be performed alternately or alternately with at least a portion of other steps or sub-steps or stages of other steps.
- Another embodiment provides a display dimming device, including the following, please refer to FIG. 4.
- the parameter value obtaining module 110 is configured to obtain a parameter value of the display screen to be adjusted.
- the parameter value has a corresponding relationship with the brightness of the display screen.
- the dimming selection module 120 is configured to compare the parameter value with a set threshold, and select a corresponding dimming mode according to the comparison result to dim the display screen.
- the display screen utilizes thin film transistors to drive pixels.
- the dimming selection module 120 includes:
- the first dimming selection unit is configured to perform dimming on the display screen by adopting a first dimming mode when determining that the brightness corresponding to the parameter value is lower than a set threshold.
- the first dimming mode does not change the voltage of the data signal received by the pixel driving circuit in the display screen during the dimming process.
- the dimming selection module 120 further includes:
- the second dimming selection unit is configured to adopt a second dimming mode when the parameter value is not lower than the set threshold.
- the second dimming mode performs dimming by adjusting the voltage of the data signal.
- the first dimming mode dims by adjusting the illumination time of each frame in the display.
- the parameter value is a brightness value.
- the set threshold is between 70 nits and 90 nits.
- the display screen dimming device provided by the present embodiment corresponds to the display screen dimming method of the above embodiment, and details are not described herein again.
- the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or the like.
- the storage medium stores a program that, when executed by the processor, implements the following steps:
- the electronic device such as a cell phone, a computer, or the like.
- the electronic device includes a peripheral drive chip and a display screen.
- the peripheral driving chip includes a memory and a processor, wherein the memory stores a program, and when the program is executed by the processor, the processor performs the following steps:
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Abstract
Description
Claims (12)
- 一种显示屏调光方法,包括:获取待调节的所述显示屏的参数值,其中,所述参数值与所述显示屏的亮度具有对应关系;及将所述参数值与设定阈值进行比较,并根据比较结果选择相应的调光方式对所述显示屏进行调光。
- 根据权利要求1所述的方法,其中,所述显示屏利用薄膜晶体管驱动像素;并且,所述将所述参数值与设定阈值进行比较,并根据比较结果选择相应的调光方式对所述显示屏进行调光,包括:判断所述参数值对应的亮度低于设定阈值时,采取第一种调光方式对所述显示屏进行调光;所述第一种调光方式在调光过程中不改变所述显示屏中像素驱动电路接收的数据信号的电压。
- 根据权利要求2所述的方法,其中,所述将所述参数值与设定阈值进行比较,并根据比较结果选择相应的调光方式对所述显示屏进行调光,包括:判断所述参数值对应的亮度不低于设定阈值时,采取第二种调光方式;所述第二种调光方式通过调节所述数据信号的电压进行调光。
- 根据权利要求3所述的方法,其中,所述第二种调光方式为源极调光方法。
- 根据权利要求1至4中任一项权利要求所述的方法,其中,所述第一种调光方式通过调节所述显示屏中的像素在每一帧的发光时间进行调光。
- 根据权利要求5权利要求所述的方法,其中,所述第一种调光方式为EM调光方式。
- 根据权利要求1至4中任一项权利要求所述的方法,其中,所述参数值包括亮度值。
- 根据权利要求7所述的方法,其中,所述设定阈值介于70尼特至90尼特之间。
- 一种显示屏调光装置,包括:参数值获取模块,用于获取待调节的所述显示屏的参数值;其中,所述参数值与所述显示屏的亮度具有对应关系;及调光选择模块,用于将所述参数值与设定阈值进行比较,并根据比较结果选择相应的调光方式对所述显示屏进行调光。
- 根据权利要求9所述的显示屏调光装置,其中,所述显示屏利用薄膜晶体管驱动像 素;并且,所述调光选择模块包括:第一调光选择单元,用于判断所述参数值对应的亮度低于设定阈值时,采取第一种调光方式对所述显示屏进行调光;所述第一种调光方式在调光过程中不改变所述显示屏中像素驱动电路接收的数据信号的电压。
- 一种电子设备,包括外围驱动芯片和显示屏;所述外围驱动芯片包括存储器和处理器,所述存储器中储存有程序,所述程序被所述处理器执行时,使得所述处理器执行如权1~8任一项所述的方法。
- 一种存储介质,其存储有程序,其中,该程序被处理器执行时实现以下步骤:获取待调节的所述显示屏的参数值;其中,所述参数值与所述显示屏的亮度具有对应关系;及将所述参数值与设定阈值进行比较,并根据比较结果选择相应的调光方式对所述显示屏进行调光。
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KR1020197022802A KR102203904B1 (ko) | 2017-06-30 | 2018-05-14 | 디스플레이 스크린의 디밍을 위한 방법, 장치, 저장 매체 및 전자 장치 |
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JP2019540582A JP7097899B2 (ja) | 2017-06-30 | 2018-05-14 | ディスプレイ調光方法、装置、記憶媒体及びデバイス |
US16/876,125 US11037529B2 (en) | 2017-06-30 | 2020-05-18 | Methods and storage media for dimming a display screen |
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US11037529B2 (en) | 2021-06-15 |
JP2021103330A (ja) | 2021-07-15 |
TWI664613B (zh) | 2019-07-01 |
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CN109215549B (zh) | 2021-01-22 |
KR20190098257A (ko) | 2019-08-21 |
US10699675B2 (en) | 2020-06-30 |
US20200111448A1 (en) | 2020-04-09 |
US20200279540A1 (en) | 2020-09-03 |
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