CN109003569B - Method, device and equipment for determining tail time of display equipment and storage medium - Google Patents

Method, device and equipment for determining tail time of display equipment and storage medium Download PDF

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CN109003569B
CN109003569B CN201810779664.0A CN201810779664A CN109003569B CN 109003569 B CN109003569 B CN 109003569B CN 201810779664 A CN201810779664 A CN 201810779664A CN 109003569 B CN109003569 B CN 109003569B
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brightness
display
display area
measurement
state
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CN109003569A (en
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陶炳俊
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Guangzhou Shiyuan Electronics Thecnology Co Ltd
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Guangzhou Shiyuan Electronics Thecnology Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0257—Reduction of after-image effects

Abstract

The embodiment of the invention discloses a method, a device, equipment and a storage medium for determining the trailing time of display equipment, wherein the method comprises the following steps: setting a background color of a current display page and a foreground color of a first display area, wherein patterns formed by the foreground color of the first display area are switched between a display state and a disappearance state at a first set frequency; and acquiring a first brightness value of the first display area, and determining the tail time according to the first brightness value, wherein the measurement frequency of the first brightness value is a second set frequency. And the tailing time is measured from the quantization angle, so that the consistency and the reproducibility are high, and the stability is good.

Description

Method, device and equipment for determining tail time of display equipment and storage medium
Technical Field
The present invention relates to data processing technology in a display device, and in particular, to a method, an apparatus, a device, and a storage medium for determining a tail time of a display device.
Background
When a display device displays a moving image, a smear phenomenon generally occurs. The tailing phenomenon of a moving image generally refers to a phenomenon in which a moving image leaves an afterimage behind a relatively stationary background, and the boundary is blurred. The degree of ghosting is the most direct measure of the degree of smearing, and is proportional to the speed of movement of the object, with a scaling factor related to the characteristics of the display device itself, and having a dimension of time, which is referred to as the smear time.
In the prior art, the trailing time can be determined through single subjective judgment or comparison subjective judgment, and the highlight trailing time and the dim trailing time can be respectively determined by introducing a trailing time test card and broadcasting equipment thereof. In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: subjective judgment easily causes that the judgment result is different from person to person; the method for introducing the trailing time test card and the broadcasting equipment thereof also needs special design of the test card, and the method has no universality and is complex to operate.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a storage medium for determining the trailing time of display equipment, which are used for measuring the trailing time from the quantization angle, and have the advantages of high consistency and reproducibility and good stability.
In a first aspect, an embodiment of the present invention provides a method for determining a trailing time of a display device, where the method includes:
setting a background color of a current display page and a foreground color of a first display area, wherein patterns formed by the foreground color of the first display area are switched between a display state and a disappearance state at a first set frequency;
and acquiring a first brightness value of the first display area, and determining the tail time according to the first brightness value, wherein the measurement frequency of the first brightness value is a second set frequency.
In a second aspect, an embodiment of the present invention further provides an apparatus for determining a trailing time of a display device, where the apparatus includes:
the device comprises a setting module, a display module and a display module, wherein the setting module is used for setting a background color of a current display page and a foreground color of a first display area, and patterns formed by the foreground color of the first display area are switched between a display state and a disappearance state at a first set frequency;
and the trailing time calculation module is used for acquiring a first brightness value of the first display area and determining the trailing time according to the first brightness value, wherein the measurement frequency of the first brightness value is a second set frequency.
In a third aspect, an embodiment of the present invention further provides a display device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the program to implement the method for determining a hangover time of a display device according to any one of the embodiments of the present invention.
In a fourth aspect, the embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method for determining a trailing time of a display device according to any one of the embodiments of the present invention.
In the embodiment of the invention, firstly, a background color of a current display page and a foreground color of a first display area are set, then a first brightness value of the first display area is obtained, and a trailing time is determined according to the first brightness value; the pattern formed by the foreground color of the first display area is switched between a display state and a disappearance state at a first set frequency, and the measurement frequency of the first brightness value is a second set frequency. And the tailing time is measured from the quantization angle, so that the consistency and the reproducibility are high, and the stability is good.
Drawings
Fig. 1a is a flowchart of a method for determining a trailing time of a display device according to a first embodiment of the present invention;
FIG. 1b is a schematic diagram illustrating a positional relationship between a display device and a luminance tester according to an embodiment of the present invention;
FIG. 1c is a state diagram of a dynamic black pattern display process according to an embodiment of the present invention;
FIG. 2a is a flowchart of a method for determining a trailing time of a display device according to a second embodiment of the present invention;
FIG. 2b is a diagram illustrating another black pattern applied in the second embodiment of the present invention during a dynamic display process;
FIG. 2c is a graph of luminance and a luminance change rate at the time of measuring a tail time according to the second embodiment of the present invention;
fig. 3 is a flowchart of a method for determining a trailing time of a display device according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of an apparatus for determining a trailing time of a display device according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of a display device in a fifth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
When displaying a moving image, different display devices have different effects, and on some display devices, moving objects or patterns may leave afterimages on a static background, so that the boundary becomes blurred, which is a trailing of the moving image. In general, the length of the afterimage is the most direct measure of the degree of smearing, and is proportional to the speed of movement of the object, with a scaling factor related to the nature of the display device and having a dimension of time, which is referred to as the smear time.
Example one
Fig. 1a is a flowchart of a method for determining a trailing time of a display device according to an embodiment of the present invention, where this embodiment is applicable to a situation of measuring the trailing time of the display device, and the method can be executed by the apparatus for determining the trailing time of the display device according to the embodiment of the present invention, and the apparatus can be implemented in a software and/or hardware manner. Referring to fig. 1a, the method may specifically include the steps of:
s110, setting a background color of a current display page and a foreground color of a first display area, wherein patterns formed by the foreground color of the first display area are switched between a display state and a disappearance state at a first set frequency.
Specifically, in the process of measuring the trailing time, the target pattern is dynamically displayed by using the display device, and specific display content and color of the target pattern are not specifically limited. Alternatively, the background color is set to any solid color P1, the foreground color is set to another solid color P2 different from the background color, and the trailing condition of the pattern composed of the solid color P2 moving under the solid color P1 is measured. In a specific example, to measure the tailing effect of a black pattern moving on a white background, the background color of the currently displayed page is set to be white, the foreground color of the first display area is set to be black, that is, the target pattern is a black pattern, P1 is white, and P2 is black. The black foreground color of the first display area forms a black pattern, and the black pattern switches between a display state and a disappearance state at a first set frequency.
For example, the first setting frequency may be 5/16Hz, that is, the display state and the disappearance state may be switched every 3200 ms. For example, in a 60Hz display screen, if the display frequency of the screen is defined as 200 frames of screen, the switching time is 200 × 16ms, the background color remains unchanged, and the foreground color switches between the display state and the disappearance state every 3200ms, that is, the black pattern switches between the display state and the disappearance state every 3200 ms. Specifically, the display time and the disappearance time may be defined as 3200 ms.
S120, acquiring a first brightness value of the first display area, and determining the trailing time according to the first brightness value, wherein the measurement frequency of the first brightness value is a second set frequency.
Specifically, the first brightness value of the first display area is obtained in real time in the process of switching the display state and the disappearance state of the pattern formed by the foreground color of the first display area at a first set frequency. In one specific example, the brightness of the first display area is captured and recorded in real time by the brightness tester at a second set frequency. Wherein the second set frequency is 200Hz, i.e. the brightness of the first display area is measured every 5 ms. Optionally, all place display device and luminance tester in under the standard darkroom environment, wherein, darkroom ambient requirement darkroom illuminance under the different external environment of darkroom internal environment is stable, and internal light source need be closed or keep apart, and wall and ground reflectance refer to the nissan darkroom standard: the wall surface reflection rate is 60 percent, and the ground reflection rate is 20 percent.
Optionally, a non-contact type luminance tester with high precision and high resolution, for example, a CCD (Charge-coupled Device) grayscale and chrominance analyzer, is placed at a certain distance from the display screen of the display Device, and the specific installation position is not specifically limited as long as the luminance of the first display region can be measured. Illustratively, the luminance tester may be placed 100cm in front of the center of the display screen of the display device. During the actual measurement, the luminance tester and the display device were fixed. And determining the tailing time according to the change of the first brightness value measured in the process of switching the display state and the disappearance state of the pattern formed by the foreground color of the first display area at a first set frequency.
Fig. 1b is a schematic diagram showing a display device and a luminance tester, wherein 130 represents the display device and 140 represents the luminance tester. Fig. 1c is a state diagram showing a dynamic display process of a black pattern, wherein 150 represents a current display page of the display device, 160 represents a background color of the current display page, 170 represents a foreground color of the first display region, and 180 represents a test mark of the luminance tester in the first display region, through which it can be determined whether the installation position of the luminance tester can accurately measure the luminance of the first display region.
In the embodiment of the invention, firstly, a background color of a current display page and a foreground color of a first display area are set, then a first brightness value of the first display area is obtained, and a trailing time is determined according to the first brightness value; the pattern formed by the foreground color of the first display area is switched between a display state and a disappearance state at a first set frequency, and the measurement frequency of the first brightness value is a second set frequency. And the tailing time is measured from the quantization angle, so that the consistency and the reproducibility are high, and the stability is good.
Example two
Fig. 2a is a flowchart of a method for determining a trailing time of a display device according to a second embodiment of the present invention, where this embodiment is implemented on the basis of the foregoing embodiment, and referring to fig. 2a, the method may specifically include the following steps:
s210, setting a background color of a current display page and a foreground color of a first display area, wherein patterns formed by the foreground color of the first display area are switched between a display state and a disappearance state at a first set frequency.
S220, acquiring a first brightness value of the first display area, and acquiring a second brightness value of the second display area.
Specifically, a first brightness value of a first display area is obtained, and a second brightness value of a second display area is obtained at the same time, where the second display area is an area other than the first display area in the current display page, and a color of the second display area is a background color. The measuring frequency of the first brightness value is a second set frequency, and the measuring frequency of the second brightness value is the second set frequency.
In a specific example, fig. 2b shows a state diagram of another black pattern in a dynamic display process, where 150 represents a current display page of the display device, 160 represents a background color of the current display page, 170 represents a foreground color of the first display region, 180 represents a test mark of the luminance tester in the first display region, and 240 represents a background color of the second display region.
And S230, if the difference value between the first brightness value and the second brightness value meets a set tailing condition, determining tailing time according to each measurement time of the first display area and each measurement time of the second display area.
Specifically, the first luminance value is denoted as Y1, the second luminance value is denoted as Y0, and Y0 may have a value of 350cd/m2The difference between the first luminance value and the second luminance value is denoted as Δ Y, which is Y1-Y0. In a specific example, the set smear condition may be that the difference is less than a set luminance threshold, e.g., 7cd/m2. When the difference value between the first brightness value and the second brightness value is smaller than the set brightness threshold, recording each measurement time of the first brightness value in the first display area and each measurement time of the second brightness value in the second display area, and determining the tail time according to the relationship between the measurement times, wherein the interval between adjacent measurement times is a measurement period corresponding to the second set frequency, and in a specific example, the measurement period may be 5 ms.
In the embodiment of the present invention, by acquiring a first luminance value of the first display area and a second luminance value of the second display area, when a difference between the first luminance value and the second luminance value satisfies a set tailing condition, a tailing time is determined according to each measurement time of the first display area and each measurement time of the second display area. The measurement of the second brightness value of the second display area is synchronously supplemented, namely the measurement of the brightness value of the background color is combined, and the tailing time is determined by combining the first brightness value of the first display area, so that the accuracy of measuring the tailing time is improved.
On the basis of the above technical solution, "if the difference between the first luminance value and the second luminance value satisfies the set tailing condition, determining the tailing time according to each measurement time of the first display area and each measurement time of the second display area" may specifically be implemented as follows:
the first brightness value and the second brightness value acquired at the same moment are subjected to difference, the difference value and the second brightness value are subjected to quotient, and the brightness change rate corresponding to the current moment is obtained; and if the pattern formed by the foreground color is switched from the display state to the disappearance state or from the disappearance state to the display state, counting the measurement times of which the brightness change rate is greater than a tailing threshold and less than 1, and determining tailing time according to the measurement times and the measurement period.
Specifically, a first brightness value and a second brightness value acquired at the same time are respectively recorded as Y1 and Y0, a difference between the first brightness value and the second brightness value is recorded as Δ Y, Δ Y is Y1-Y0, a brightness change rate at the current time is recorded as K, K is | Δ Y/Y0|, and a K value between 0 and 1 represents a dynamic response process in a display screen of the display device, which can be used to measure a tail time, and for example, a tail time greater than 0.02 and less than 1 can be perceived.
Optionally, the tailing threshold is 0.02, when the pattern formed by the foreground is switched from the display state to the disappearance state or from the disappearance state to the display state, counting the number of times of measurement of the first luminance value of the first display area when K is greater than 0.02< K <1 as a number of times of measurement C, and determining the tailing time according to C and the measurement period. When the brightness change rate K is close to 0, the color of the first display area is a background color, and when the brightness change rate K is close to 1, the color of the first display area is a foreground color.
In a specific example, fig. 2c shows a graph of luminance and a rate of change in luminance at the time of measurement of a tail time, in which the abscissa indicates the number of times of measurement of the first luminance value of the first display region, for example, 23 indicates the 23 rd measurement, the time between adjacent times of measurement is a measurement period, and the left ordinate indicates the first luminance value in the unit of 350cd/m in fig. 2c2The ordinate on the right side of fig. 2c represents the rate of change of brightness, dimensionless; a luminance change curve of the first display region is denoted by 250, a luminance change rate curve is denoted by 260, and a luminance collection point satisfying a tail condition is denoted by 270. In FIG. 2c shouldThe scene may be a change process in which the background color of the first display region is switched to the foreground color and then to the background color, that is, a process in which the pattern formed by the foreground color is switched from the disappearance state to the display state and then to the disappearance state. In fig. 2C, the measurement time C is 6, i.e. 39 th to 44 th, wherein the luminance change rate at the 44 th measurement is 0.0228, and the luminance change rate at the 45 th measurement is 0.0057, and the tail time is the product of the measurement time C and the measurement period, and in this specific example, the tail time is 5ms 6 to 30 ms. The tailing time is determined by combining the measurement times of the brightness change rate meeting the conditions and the corresponding measurement period, and the tailing time is measured by quantizing the angle, so that the tailing time is more accurate, more stable and high in reproducibility compared with subjective artificial judgment of the tailing time.
EXAMPLE III
Fig. 3 is a flowchart of a method for determining a tailing time of a display device according to a third embodiment of the present invention, where "acquiring a first brightness value of the first display area and determining a tailing time according to the first brightness value" is optimized based on the above embodiments. Referring to fig. 3, the method may specifically include the following steps:
s310, setting a background color of a current display page and a foreground color of a first display area, wherein patterns formed by the foreground color of the first display area are switched between a display state and a disappearance state at a first set frequency.
S321, if the pattern formed by the foreground color is switched from a display state to a disappearance state, recording the brightness values of the pattern at different measurement moments, and determining the trailing time according to the state switching moment and the moment when the first brightness threshold appears.
Specifically, when the pattern formed by the foreground is switched from the display state to the disappearance state, the brightness values of the pattern at different measurement moments are recorded, and the tailing time is determined by combining the state switching moment and the moment when the first brightness threshold value appears. The first brightness threshold is a critical brightness when the foreground color in the first display area is switched to the background color, and the measurement frequency of the first brightness value is a second set frequency. In a specific example, the critical brightness when the foreground color is switched to the background color is Q1, the state switching time is T1, the time when Q1 appears is T2, and T2-T1 are corresponding trailing times.
And S322, if the pattern formed by the foreground color is switched from a disappearance state to a display state, recording the brightness values of the pattern at different measurement moments, and determining the tailing time according to the state switching moment and the moment when the second brightness threshold value appears.
Specifically, when the pattern formed by the foreground is switched from the disappearance state to the display state, the brightness values of the pattern at different measurement times are recorded, and the tailing time is determined by combining the state switching time and the time when the second brightness threshold value appears. The second brightness threshold is the critical brightness when the background color in the first display area is switched to the foreground color. In a specific example, when the background color is switched to the foreground color, the critical brightness is Q2, the state switching time is T3, the time when Q2 appears is T4, and T4-T3 are corresponding trailing time.
In the embodiment of the invention, when the pattern formed by the foreground color is determined to be switched from the display state to the disappearance state or the pattern formed by the foreground color is determined to be switched from the disappearance state to the display state, the brightness values of the pattern at different measurement moments are recorded, and the tailing time is determined according to the state switching moment and the moment when the first brightness threshold value appears or the state switching moment and the moment when the second brightness threshold value appears. The first brightness threshold value and the second brightness threshold value can be set according to different requirements of a user, so that the tailing time is determined, the operation is simple, and the calculation is convenient
Example four
Fig. 4 is a schematic structural diagram of an apparatus for determining a trailing time of a display device according to a fourth embodiment of the present invention, where the apparatus is adapted to execute a method for determining a trailing time of a display device according to the fourth embodiment of the present invention. As shown in fig. 4, the apparatus may specifically include:
a setting module 410, configured to set a background color of a currently displayed page and a foreground color of a first display area, where a pattern formed by the foreground color of the first display area switches between a display state and a disappearance state at a first set frequency;
a trailing time calculating module 420, configured to obtain a first brightness value of the first display area, and determine a trailing time according to the first brightness value, where a measurement frequency of the first brightness value is a second set frequency.
Further, the method also comprises the following steps:
a brightness value obtaining module, configured to obtain a second brightness value of a second display area, where a color of the second display area is a background color, and a measurement frequency of the second brightness value is the second set frequency;
correspondingly, the trailing time calculating module 420 is specifically configured to:
and when the difference value between the first brightness value and the second brightness value is determined to meet a set tailing condition, determining tailing time according to each measurement time of the first display area and each measurement time of the second display area, wherein the interval between adjacent measurement times is a measurement period corresponding to the second set frequency.
Further, the trailing time calculating module 420 is specifically configured to:
the first brightness value and the second brightness value acquired at the same moment are subjected to difference, the difference value and the second brightness value are subjected to quotient, and the brightness change rate corresponding to the current moment is obtained;
and if the pattern formed by the foreground color is switched from the display state to the disappearance state or from the disappearance state to the display state, counting the measurement times of which the brightness change rate is greater than a tailing threshold and less than 1, and determining tailing time according to the measurement times and the measurement period.
Further, the hangover time calculation module 420 is further configured to:
if the pattern formed by the foreground color is switched from a display state to a disappearance state, recording the brightness values of the pattern at different measurement moments, and determining the tailing time according to the state switching moment and the moment when a first brightness threshold value appears, wherein the first brightness threshold value is the critical brightness when the foreground color is switched to the background color in the first display area;
if the pattern formed by the foreground color is switched to a display state from a disappearance state, recording the brightness values of the pattern at different measurement moments, and determining the tailing time according to the state switching moment and the moment when a second brightness threshold value appears, wherein the second brightness threshold value is the critical brightness when the background color in the first display area is switched to the foreground color.
The device for determining the trailing time of the display device, provided by the embodiment of the invention, can execute the method for determining the trailing time of the display device, provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
EXAMPLE five
Fig. 5 is a schematic structural diagram of a display device according to a fifth embodiment of the present invention. FIG. 5 illustrates a block diagram of an exemplary display device 12 suitable for use in implementing embodiments of the present invention. The display device 12 shown in fig. 5 is only an example, and should not bring any limitation to the function and the range of use of the embodiment of the present invention.
As shown in fig. 5, display device 12 is in the form of a general purpose computing device. The components of display device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that couples various system components including the system memory 28 and the processing unit 16.
Bus 18 represents one or more of any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, and a processor or local bus using any of a variety of bus architectures. By way of example, such architectures include, but are not limited to, Industry Standard Architecture (ISA) bus, micro-channel architecture (MAC) bus, enhanced ISA bus, Video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.
Display device 12 typically includes a variety of computer system readable media. Such media may be any available media that is accessible by display device 12 and includes both volatile and nonvolatile media, removable and non-removable media.
The system memory 28 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM)30 and/or cache memory 32. Display device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 5, and commonly referred to as a "hard drive"). Although not shown in FIG. 5, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 by one or more data media interfaces. System memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.
A program/utility 40 having a set (at least one) of program modules 42 may be stored, for example, in system memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. Program modules 42 generally carry out the functions and/or methodologies of the described embodiments of the invention.
Display device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), with one or more devices that enable a user to interact with the display device 12, and/or with any devices (e.g., network card, modem, etc.) that enable the display device 12 to communicate with one or more other computing devices. Such communication may be through an input/output (I/O) interface 22. Also, the display device 12 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the Internet) via the network adapter 20. As shown, the network adapter 20 communicates with the other modules of the display device 12 over the bus 18. It should be appreciated that although not shown in FIG. 5, other hardware and/or software modules may be used in conjunction with display device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
The processing unit 16 executes various functional applications and data processing by executing programs stored in the system memory 28, for example, to implement the method for determining the trailing time of the display device provided by the embodiment of the present invention:
that is, the processing unit implements, when executing the program: setting a background color of a current display page and a foreground color of a first display area, wherein patterns formed by the foreground color of the first display area are switched between a display state and a disappearance state at a first set frequency; and acquiring a first brightness value of the first display area, and determining the tail time according to the first brightness value, wherein the measurement frequency of the first brightness value is a second set frequency.
EXAMPLE six
An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements a method for determining a trailing time of a display device, as provided in all inventive embodiments of the present application:
that is, the program when executed by the processor implements: setting a background color of a current display page and a foreground color of a first display area, wherein patterns formed by the foreground color of the first display area are switched between a display state and a disappearance state at a first set frequency; and acquiring a first brightness value of the first display area, and determining the tail time according to the first brightness value, wherein the measurement frequency of the first brightness value is a second set frequency.
Any combination of one or more computer-readable media may be employed. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (6)

1. A method for determining a trailing time of a display device, comprising:
setting a background color of a current display page and a foreground color of a first display area, wherein patterns formed by the foreground color of the first display area are switched between a display state and a disappearance state at a first set frequency;
acquiring a first brightness value of the first display area, and determining the tail time according to the first brightness value, wherein the measurement frequency of the first brightness value is a second set frequency;
acquiring a second brightness value of a second display area, wherein the color of the second display area is a background color, and the measurement frequency of the second brightness value is the second set frequency;
wherein said determining a trailing time from said first luminance value comprises:
if the difference value between the first brightness value and the second brightness value meets a set tailing condition, determining tailing time according to each measurement time of the first display area and each measurement time of the second display area, wherein the interval between adjacent measurement times is a measurement period corresponding to the second set frequency;
wherein, if the difference between the first brightness value and the second brightness value satisfies a set tailing condition, determining a tailing time according to each measurement time of the first display area and each measurement time of the second display area, including:
the first brightness value and the second brightness value acquired at the same moment are subjected to difference, the difference value and the second brightness value are subjected to quotient, and the brightness change rate corresponding to the current moment is obtained;
and if the pattern formed by the foreground color is switched from the display state to the disappearance state or from the disappearance state to the display state, counting the measurement times of which the brightness change rate is greater than a tailing threshold and less than 1, and determining tailing time according to the measurement times and the measurement period.
2. The method according to claim 1, wherein obtaining a first luminance value of the first display area, determining a tail time according to the first luminance value, and wherein the first luminance value is measured at a second set frequency, further comprising:
if the pattern formed by the foreground color is switched from a display state to a disappearance state, recording the brightness values of the pattern at different measurement moments, and determining the tailing time according to the state switching moment and the moment when a first brightness threshold value appears, wherein the first brightness threshold value is the critical brightness when the foreground color is switched to the background color in the first display area;
if the pattern formed by the foreground color is switched to a display state from a disappearance state, recording the brightness values of the pattern at different measurement moments, and determining the tailing time according to the state switching moment and the moment when a second brightness threshold value appears, wherein the second brightness threshold value is the critical brightness when the background color in the first display area is switched to the foreground color.
3. An apparatus for determining a trailing time of a display device, comprising:
the device comprises a setting module, a display module and a display module, wherein the setting module is used for setting a background color of a current display page and a foreground color of a first display area, and patterns formed by the foreground color of the first display area are switched between a display state and a disappearance state at a first set frequency;
a trailing time calculation module, configured to obtain a first brightness value of the first display area, and determine a trailing time according to the first brightness value, where a measurement frequency of the first brightness value is a second set frequency;
a brightness value obtaining module, configured to obtain a second brightness value of a second display area, where a color of the second display area is a background color, and a measurement frequency of the second brightness value is the second set frequency;
correspondingly, the trailing time calculation module is specifically configured to:
when the difference value between the first brightness value and the second brightness value is determined to meet a set tailing condition, determining tailing time according to each measurement time of the first display area and each measurement time of the second display area, wherein the interval between adjacent measurement times is a measurement period corresponding to the second set frequency;
wherein the trailing time calculation module is specifically configured to:
the first brightness value and the second brightness value acquired at the same moment are subjected to difference, the difference value and the second brightness value are subjected to quotient, and the brightness change rate corresponding to the current moment is obtained;
and if the pattern formed by the foreground color is switched from the display state to the disappearance state or from the disappearance state to the display state, counting the measurement times of which the brightness change rate is greater than a tailing threshold and less than 1, and determining tailing time according to the measurement times and the measurement period.
4. The apparatus of claim 3, wherein the hangover time calculation module is further configured to:
if the pattern formed by the foreground color is switched from a display state to a disappearance state, recording the brightness values of the pattern at different measurement moments, and determining the tailing time according to the state switching moment and the moment when a first brightness threshold value appears, wherein the first brightness threshold value is the critical brightness when the foreground color is switched to the background color in the first display area;
if the pattern formed by the foreground color is switched to a display state from a disappearance state, recording the brightness values of the pattern at different measurement moments, and determining the tailing time according to the state switching moment and the moment when a second brightness threshold value appears, wherein the second brightness threshold value is the critical brightness when the background color in the first display area is switched to the foreground color.
5. A display device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1-2 when executing the program.
6. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1-2.
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