CN102169664A - Time delay detecting method and device of display device - Google Patents
Time delay detecting method and device of display device Download PDFInfo
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- CN102169664A CN102169664A CN2011100313252A CN201110031325A CN102169664A CN 102169664 A CN102169664 A CN 102169664A CN 2011100313252 A CN2011100313252 A CN 2011100313252A CN 201110031325 A CN201110031325 A CN 201110031325A CN 102169664 A CN102169664 A CN 102169664A
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Abstract
The invention relates to the field of display devices, in particular relating to a time delay detecting method and device of a display device, wherein the method and device provided by the invention are used for solving the problem that the time delay of the display device is hard to detect except a manufacturer in the prior art. The method comprises the following steps: embedding a feature symbol in an image output by the display device; displaying a prompt message when embedding the feather symbol in the image; recording a time for displaying the prompt message; obtaining a parameter of the feature symbol image displayed by the display device; and computing the time difference between the time of displaying the feature symbol image parameter and the time of displaying the prompt message so as to acquire the time delay of the display device from reception of image data to display of image data on a screen. The time delay of the display device can be accurately measured through a scheme of a high-speed camera unit.
Description
Technical field
The present invention relates to field of display devices, particularly about a kind of display device time delay detecting method and device.
Background technology
When the user uses display device such as display/TV to carry out the work amusement, the time delay of display/TV can exert an influence to people's eyesight, the display device that time delay is little can make picture level and smooth, even if the display device that time delay is big can not feel obviously that the user watches symptoms such as also can producing visual fatigue for a long time.
When using display device to play some racing car shootings etc. to need reaction recreation at a high speed, the time delay of a few tens of milliseconds has tangible influence to many operations, and different display/TVs can cause the time delay error of tens milliseconds even tens of milliseconds.When watching some high definition commercial large stretch of, postponing a meeting or conference when low makes picture smooth more, postpones a meeting or conference when high and causes picture discontinuous, influences the user and watches program.
Lack the scheme of display device being carried out time delay detection in the prior art.
Summary of the invention
The embodiment of the invention provides a kind of display device time delay detecting method and device, is used for solving prior art very difficult problem that the time delay of display device is detected except production firm.
The embodiment of the invention provides a kind of display device time delay detecting method, comprising:
In the image of described display device output, embedding signature;
Display reminding information when in described image, embedding described signature;
Record shows the time of described information;
Obtain the parameter that display device shows described signature image;
Calculate described display device and show the poor of described signature image parameter and the time that shows described information, obtain described display device from receiving view data to the time delay that is shown on the screen.
According to a further aspect of the described a kind of display device time delay detecting method of the embodiment of the invention, described signature is the time data of current time or is the luminescent image of certain luminance.
Another further aspect according to the described a kind of display device time delay detecting method of the embodiment of the invention, embed signature and be included in the described time data of demonstration in the described image, perhaps the specific region in described image shows the luminescent image of certain luminance.
According to another further aspect of the described a kind of display device time delay detecting method of the embodiment of the invention, in the display reminding information, described information is the current time when embedding described signature in described image; Perhaps for sending light signal.
Another further aspect according to the described a kind of display device time delay detecting method of the embodiment of the invention, when in the embedded images be time data the time, in the time of the described information of record demonstration, comprise the time of utilizing frame per second to send light signal for other high-speed camera unit record of Millisecond;
In obtaining the parameter that display device shows described signature image, comprise, utilize described high-speed camera unit to obtain time data in the display device display image simultaneously;
In calculating the difference that described display device shows described signature image parameter and the time that shows described information, comprise, utilize the described time of sending light signal to deduct time data in the display device display image, obtain described display device from receiving view data to the time delay that is shown on the screen.
Another further aspect according to the described a kind of display device time delay detecting method of the embodiment of the invention, when in the embedded images be the luminescent image of certain luminance the time, in the time of the described information of record demonstration, comprise that record embeds the unit embeds the luminescent image of certain luminance in described image time;
In obtaining the parameter that display device shows described signature image, comprise the time when utilizing the light sensation logging modle to obtain the luminescent image that shows this certain luminance in the display device;
In calculating the difference that described display device shows described signature image parameter and the time that shows described information, comprise, time when utilizing display device to show the luminescent image of described certain luminance deducts record and embeds the unit embeds the luminescent image of certain luminance in described image time, obtains described display device from receiving view data to the time delay that is shown on the screen.
Another further aspect according to the described a kind of display device time delay detecting method of the embodiment of the invention, when in the embedded images be time data the time, in obtaining the parameter that display device shows described signature image, comprise shown time data when utilizing frame per second to obtain for other high-speed camera unit of Millisecond that time data changes in the display device display image;
In record shows time of described information, comprise, utilize described high-speed camera unit to write down current time when time data changes in the above-mentioned display device images simultaneously;
In calculating the difference that described display device shows described signature image parameter and the time that shows described information, utilize the current time to deduct previous shown time data when time data changes in the display device display image, obtain described display device from receiving view data to the time delay that is shown on the screen.
The embodiment of the invention also provides a kind of time delay detection device of display device, comprises,
The signature unit embeds the unit, information unit, record cell, computing unit, interface unit;
Described signature unit is used for the generating feature mark;
Described embedding unit is connected with described signature unit, is used for embedding described signature at the image to described display device output;
Described interface unit is connected with described embedding unit, is used for to the display device output image;
Described information unit is connected with described embedding unit, is used for display reminding information when described image embeds described signature;
Described record cell is connected with described information unit, is used to write down the time that shows described information and obtain the parameter that display device shows described signature image;
Described computing unit, be connected with described record cell, be used to calculate described display device and show the poor of described signature image parameter and the time that shows described information, obtain described display device from receiving view data to the time delay that is shown on the screen.
According to a further aspect of the time delay detection device of the described a kind of display device of the embodiment of the invention, described signature unit is used to generate the time data of current time or the luminescent image of certain luminance;
Described information unit shows the current time or sends light signal.
Another further aspect according to the time delay detection device of the described a kind of display device of the embodiment of the invention, described record cell is that frame per second is other high-speed camera unit of Millisecond, the time that the described Tip element of this high-speed camera unit record sends light signal, and obtain time data in the display device display image simultaneously, the time that described computing unit utilizes described Tip element to send light signal deducts the time data in the display device display image, obtains described display device from receiving view data to the time delay that is shown on the screen;
Perhaps, described record cell comprises that frame per second is other high-speed camera unit of Millisecond, described high-speed camera unit also obtains time data shown when time data changes in the display device display image, and write down simultaneously the current time that the information unit shows, described computing unit utilizes the current time to deduct the time data of the previous demonstration when time data changes in the display device display image, obtains described display device from receiving view data to the time delay that is shown on the screen;
Perhaps, described record cell comprises processing module and light sensation logging modle, described processing module is used for writing down the embedding unit embeds the luminescent image of certain luminance at described image time, time when described light sensation logging modle is used for obtaining display device and shows the luminescent image of this certain luminance, time during luminescent image that described computing unit is used to utilize display device to show described certain luminance deducts the time of processing module record, obtains described display device from receiving view data to the time delay that is shown on the screen.
By the embodiment of the invention, accurately (within 1 millisecond) and measure the time delay of display device easily; By the scheme of high-speed camera unit, can carry out the measurement of display device time delay accurately; Can finish the measurement of display device time delay quickly and easily by photodiode.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Figure 1 shows that a kind of display device time delay detecting method of embodiment of the invention process flow diagram;
Figure 2 shows that a kind of display device time delay detection of embodiment of the invention apparatus structure synoptic diagram;
Figure 3 shows that another structural representation of a kind of display device time delay detection of embodiment of the invention device;
Figure 4 shows that a kind of display device time delay detecting method of embodiment of the invention specific embodiment process flow diagram;
Figure 5 shows that another specific embodiment process flow diagram of a kind of display device time delay detecting method of the embodiment of the invention;
Figure 6 shows that another specific embodiment process flow diagram of a kind of display device time delay detecting method of the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Be illustrated in figure 1 as a kind of display device time delay detecting method of embodiment of the invention process flow diagram.
Comprise step 101, in the image of described display device output, embedding signature.
Step 102, display reminding information when in described image, embedding described signature.
Step 103, record shows the time of described information.
Step 104 is obtained the parameter that display device shows described signature image.Wherein parameter comprises that display device shows the time of described signature image, perhaps the content in this display device indicating characteristic marking image, for example time data in the image.
Step 105 is calculated described display device and is shown the poor of described signature image parameter and the time that shows described information, obtains described display device from receiving view data to the time delay that is shown on the screen.
Described signature is the time data of current time or for the luminescent image of certain luminance etc., embeds signature and is included in and shows described time data in the described image, and perhaps the specific region in described image shows the luminescent image of certain luminance.Can use image synthetic technology of the prior art to realize the process of above-mentioned embedding signature, not repeat them here.
When in described image, embedding described signature in the display reminding information, can use display screen to show the current time, here the current time that shows by display screen (for example charactron etc.) is a real-time change, this charactron can be driven by the clock crystal oscillator of chip internal, accuracy of timekeeping can for example reach nanosecond (ns) level, and the above-mentioned time data that is embedded into the current time in the image just can not change later in being embedded into image, but shows different time datas in the As time goes on different image frames; Perhaps described Tip element is a luminescence unit, can use luminescence unit to send light signal, described luminescence unit can for example be a light emitting diode, in twice adjacent light signal, to after showing to have the signature image, display device send light signal for the second time, the corresponding relation of light signal and display device time delay just can be told than the time prolongation of display device in interval between this twice light signal therefore.
Pass through the foregoing description, utilize the time of recording feature mark time and record display device indicating characteristic mark, can obtain this display device and show the time delay of this view data to display device from receiving view data, utilize this time delay production firm can further improve product, shorten the time delay of display device, improve user experience.
Be illustrated in figure 2 as a kind of display device time delay detection of embodiment of the invention apparatus structure synoptic diagram.
Described signature unit 201 is used for the generating feature mark.
Described embedding unit 202 is connected with described signature unit 201, is used for embedding described signature at the image to described display device output.
Described interface unit 206 is connected with described embedding unit 202, is used for to the display device output image.Described interface unit can comprise HDMI (High Definition Multimedia Interface) (HDMI:High Definition Multimedia Interface), digital visual interface (DVI:Digital Visual Interface), composite video broadcast singal interface (CVBS:Composite Video Broadcast Signal), video transmission standard interface (VGA:Video Graphics Array) etc. are so that be applicable to the time delay detection of multiple different display device.
Described information unit 203 is connected with described embedding unit 202, is used for display reminding information when described image embeds described signature.
Described record cell 204 is connected with described information unit 203,, be used to write down the time that shows described information and obtain the parameter that display device shows described signature image.Wherein parameter comprises time data or shows time of described signature image.
Described computing unit 205, be connected with described record cell 204, be used to calculate described display device and show the poor of described signature image parameter and the time that shows described information, obtain described display device from receiving view data to the time delay that is shown on the screen.
The signature that described signature unit 201 is produced comprises, the time data of current time or be luminescent image etc.The described time data that produces can be produced by field programmable gate array (FPGA:Field-Programmable Gate Array) clock internal module, use FPGA but be not restricted to, can also other has the equipment such as chip of processing power for single-chip microcomputer etc.The required clocking capability of this display device time delay detection device can be produced by the crystal oscillator of chip internal, and this accuracy of timekeeping can be the ns rank.
Described information unit 203 comprises display screen or luminescence unit, can use display screen to show described time data, and wherein said display screen can for example be a charactron; Perhaps can use luminescence unit display light signal, described luminescence unit can for example be a light emitting diode.
Described embedding unit 202, for example can using, the logical block of fpga chip inside is implemented in the described time data of embedding in the described image, the perhaps luminescent image of the embedding of the specific region in described image certain luminance.
Described record cell 204, comprise that frame per second is other high-speed camera unit of Millisecond or is the light sensation logging modle, utilize the time of described high-speed camera unit record display reminding information and obtain display device and show time data in the described signature image, perhaps utilize the light sensation logging modle to discern the light signal that described luminescence unit sends, write down the light signal time that described luminescence unit sends, and identify the zone that described display device demonstration has luminescent image, write down described display device and show time with luminescent image zone.Wherein the light sensation logging modle can utilize photodiode for example to discern the luminescent image zone that light signal or display device show.Wherein said high-speed camera unit can be realized the identification of content in the image frame by image recognition technology of the prior art, for example discern the current time in the charactron, the time data that shows in the image in the identification display device, do not repeat them here, perhaps also can be by the content in the naked eyes recognition image.
Above-mentioned signature unit 201 embeds unit 202, and record cell 204 and computing unit 205 for example can use the logical block of fpga chip inside to realize its function.
Pass through the foregoing description, utilize the time of recording feature mark time and record display device indicating characteristic mark, can obtain this display device and show the time delay of this view data to display device from receiving view data, utilize this time delay production firm can further improve product, shorten the time delay of display device, improve user experience.
Be illustrated in figure 3 as another structural representation of a kind of display device time delay detection of embodiment of the invention device.
Described device chip 301, be used to produce luminescent image, at the luminescent image that embeds certain luminance to the specific region of described display device output image, when embedding described luminescent image, export pulses so that described light emitting diode 302 is lighted to described light emitting diode 302, described device chip 301 can obtain to light the time of described light emitting diode and write down this time by clock internal, perhaps can receive the pulse signal that first photodiode 303 sends, this pulse signal is detected by described first photodiode 303 and spreads out of after above-mentioned light emitting diode 302 sends light signal.Perhaps can also show the current time, the time that charactron shows in the time of can showing that light emitting diode 302 is lighted accurately in the image frame that high-speed camera is taken when using high-speed camera to carry out time delay detection by charactron 305.
Described image is sent to display device 306 by interface 304 (can use any one in a plurality of interfaces), described second photodiode 303 ' detects the luminescent image of certain luminance in described display device 306, described image can be black image, described luminescent image can be white image, such second photodiode 303 ' just can be when display device shows this luminescent image output pulse signal.
The image that detects display device output in display device side when second photodiode 303 ' can send pulse signal when having described luminescent image, described device chip 301 is gathered the pulse signal of described second photodiode 303 ', and note time of this pulse signal, the light emitting diode 302 that the computing module of use device chip 301 inside calculates time pulse signal that second photodiode 303 ' sends and record is lighted the difference between the time, and this difference is exactly that display device is from receiving the time delay of view data to display image data.Perhaps calculate the difference between the time pulse signal that first photodiode 303 of time pulse signal that second photodiode 303 ' sends and record sends.
The time that charactron showed when perhaps described high-speed camera identified light emitting diode 302 and lights by image recognition technology (also comprises charactron in the picture of described high-speed camera production, the time that can obtain to show on the charactron) by the mode of image recognition, described device chip 301 obtains the time that described above-mentioned high-speed camera identifies, the light emitting diode 302 that Time Calculation during again according to second photodiode, 303 ' output pulse signal goes out time pulse signal and record is lighted the difference between the time, and this difference is exactly that display device is from receiving the time delay of view data to display image data.
Be illustrated in figure 4 as embodiment of the invention display device time delay detecting method specific embodiment process flow diagram.
Comprise step 401, the time delay detection device is connected with display device.
Step 402 starts described time delay detection device, and the charactron on the time delay detection device shows the current time according to device chip clock internal in the time delay detection device.
As optionally, step 407 repeats above-mentioned steps 401-406, obtains repeatedly time delay result, and the mean value of calculation delay, this mean value are reliable display device time delay.
Be illustrated in figure 5 as another specific embodiment process flow diagram of a kind of display device time delay detecting method of the embodiment of the invention.
Comprise step 501, the time delay detection device is connected with display device.
Step 506 in the picture of high-speed camera unit production, during lumination of light emitting diode on the time delay detection device, has shown a time data at the screen displayed device of described high-speed camera unit setting, obtains the time data of this demonstration.
Time when step 507, time delay detection device are utilized described lumination of light emitting diode (whole second time) deducts the time data that shows in the described display device, is certain time delay of this display device.Perhaps the utilization of time delay detection device deducts the time data that shows in the described display device by the time that the high-speed camera unit photographs first frame that diode lighted frame by frame, is certain time delay of this display device.
Be illustrated in figure 6 as another specific embodiment process flow diagram of a kind of display device time delay detecting method of the embodiment of the invention.
Step 601 is connected the time delay detection device with display device.
Step 606 after described time delay detection device receives above-mentioned pulse signal, utilizes time of described pulse signal to deduct time of the embedding luminescent image of described time delay detection device recording, is certain time delay of this display device.
The present invention is (within 1 millisecond) and measure the time delay of display/TV easily accurately; By the scheme of high-speed camera unit, can carry out the measurement of display/TV time delay accurately; Can finish the measurement of display/TV time delay quickly and easily by photodiode.Different delay characters also has different meanings to the common use of user, and as the stability of picture, to the protection of eyesight, this invention selects to provide favourable foundation for domestic consumer carries out display/TV.
Above-described embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is the specific embodiment of the present invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. display device time delay detecting method is characterized in that comprising:
In the image of described display device output, embedding signature;
Display reminding information when in described image, embedding described signature;
Record shows the time of described information;
Obtain the parameter that display device shows described signature image;
Calculate described display device and show the poor of described signature image parameter and the time that shows described information, obtain described display device from receiving view data to the time delay that is shown on the screen.
2. a kind of display device time delay detecting method according to claim 1 is characterized in that, described signature is the time data of current time or is the luminescent image of certain luminance.
3. a kind of display device time delay detecting method according to claim 2 is characterized in that, embeds signature and is included in the described time data of demonstration in the described image, and perhaps the specific region in described image shows the luminescent image of certain luminance.
4. a kind of display device time delay detecting method according to claim 2 is characterized in that, in the display reminding information, described information is the current time when embedding described signature in described image; Perhaps for sending light signal.
5. a kind of display device time delay detecting method according to claim 4, it is characterized in that, when in the embedded images be time data the time, in record shows time of described information, comprise the time of utilizing frame per second to send light signal for other high-speed camera unit record of Millisecond;
In obtaining the parameter that display device shows described signature image, comprise, utilize described high-speed camera unit to obtain time data in the display device display image simultaneously;
In calculating the difference that described display device shows described signature image parameter and the time that shows described information, comprise, utilize the described time of sending light signal to deduct time data in the display device display image, obtain described display device from receiving view data to the time delay that is shown on the screen.
6. a kind of display device time delay detecting method according to claim 4, it is characterized in that, when in the embedded images be the luminescent image of certain luminance the time, in the time of the described information of record demonstration, comprise that record embeds the unit embeds the luminescent image of certain luminance in described image time;
In obtaining the parameter that display device shows described signature image, comprise the time when utilizing the light sensation logging modle to obtain the luminescent image that shows this certain luminance in the display device;
In calculating the difference that described display device shows described signature image parameter and the time that shows described information, comprise, time when utilizing display device to show the luminescent image of described certain luminance deducts record and embeds the unit embeds the luminescent image of certain luminance in described image time, obtains described display device from receiving view data to the time delay that is shown on the screen.
7. a kind of display device time delay detecting method according to claim 4, it is characterized in that, when in the embedded images be time data the time, in obtaining the parameter that display device shows described signature image, comprise shown time data when utilizing frame per second to obtain for other high-speed camera unit of Millisecond that time data changes in the display device display image;
In record shows time of described information, comprise, utilize described high-speed camera unit to write down current time when time data changes in the above-mentioned display device images simultaneously;
In calculating the difference that described display device shows described signature image parameter and the time that shows described information, utilize the current time to deduct the previous shown time data that time data changes in the display device display image, obtain described display device from receiving view data to the time delay that is shown on the screen.
8. the time delay detection device of a display device is characterized in that comprising,
The signature unit embeds the unit, information unit, record cell, computing unit, interface unit;
Described signature unit is used for the generating feature mark;
Described embedding unit is connected with described signature unit, is used for embedding described signature at the image to described display device output;
Described interface unit is connected with described embedding unit, is used for to the display device output image;
Described information unit is connected with described embedding unit, is used for display reminding information when described image embeds described signature;
Described record cell is connected with described information unit, is used to write down the time that shows described information and obtain the parameter that display device shows described signature image;
Described computing unit, be connected with described record cell, be used to calculate described display device and show the poor of described signature image parameter and the time that shows described information, obtain described display device from receiving view data to the time delay that is shown on the screen.
9. the time delay detection device of a kind of display device according to claim 8 is characterized in that, described signature unit is used to generate the time data of current time or the luminescent image of certain luminance;
Described information unit shows the current time or sends light signal.
10. the time delay detection device of a kind of display device according to claim 9, it is characterized in that, described record cell is that frame per second is other high-speed camera unit of Millisecond, the time that the described Tip element of this high-speed camera unit record sends light signal, and obtain time data in the display device display image simultaneously, the time that described computing unit utilizes described Tip element to send light signal deducts the time data in the display device display image, obtains described display device from receiving view data to the time delay that is shown on the screen;
Perhaps, described record cell comprises that frame per second is other high-speed camera unit of Millisecond, described high-speed camera unit also obtains time data shown when time data changes in the display device display image, and write down simultaneously the current time that the information unit shows, described computing unit utilizes the current time to deduct the time data of the previous demonstration when time data changes in the display device display image, obtains described display device from receiving view data to the time delay that is shown on the screen;
Perhaps, described record cell comprises processing module and light sensation logging modle, described processing module is used for writing down the embedding unit embeds the luminescent image of certain luminance at described image time, time when described light sensation logging modle is used for obtaining display device and shows the luminescent image of this certain luminance, time during luminescent image that described computing unit is used to utilize display device to show described certain luminance deducts the time of processing module record, obtains described display device from receiving view data to the time delay that is shown on the screen.
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