CN100397054C - System and method for automatically measuring light reaction time - Google Patents
System and method for automatically measuring light reaction time Download PDFInfo
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- CN100397054C CN100397054C CNB2003101230267A CN200310123026A CN100397054C CN 100397054 C CN100397054 C CN 100397054C CN B2003101230267 A CNB2003101230267 A CN B2003101230267A CN 200310123026 A CN200310123026 A CN 200310123026A CN 100397054 C CN100397054 C CN 100397054C
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Abstract
The present invention relates to a system and a method for automatically measuring light reaction time. The system for automatically measuring the light reaction time comprises a detection module and a control module which are connected with a display to be measured so as to form a measurement loop. The system utilizes the detection module to measure the voltage difference of two light intensities before and after the change of a grey scale image; the voltage difference of the two light intensities is used as a comparison standard after voltage division by resistors and is compared with a voltage of a light intensity measured by the change of the grey scale image so as to rapidly obtain and store the light reaction time and achieve an automatic measuring function. The system can be used for measuring the light reaction time of the display at low cost and a high speed.
Description
Technical field
The present invention relates to a kind of system and method thereof that measures optical response time, particularly relate to a kind of system and method thereof of the auto-measuring optical response time about display.
Background technology
Progress along with science and technology, more and more Duo electronic product all trends towards gently, thin route develops, general existing traditional CRT monitor is because the outward appearance volume is comparatively huge, weight is also heavier, so come over the last two years, the LCD Panel less, that weight is lighter (LCD) that need take up room of quilt slowly replaces, and under the situation that the LCD price reduces gradually, LCD will become the display of main flow gradually in several years of future, therefore, to how to test, the quality of a LCD of criticism, also become a crucial technology certainly.
In general, display is to be used for one of pointer estimating a display quality with the time that electric signal is converted into light, and method for measurement comparatively commonly used usually, be to do analysis again after converting the aanalogvoltage signal to digital signal, utilize single photoinduction unit sampling, calculate switching time to obtain the optical response time of display, and owing to do not know that in advance display image to be measured changes the signal of front and back, so essential complete whole transfer process of record during test, then do numerical analysis again, the point that photoinduction signal from 10% to 90% is changed calculates, to calculate the optical response time of this display; If utilize general instrument to use above-mentioned mode to measure the optical response time of display, produced the data information amount will be very huge, analyzing also can be very time-consuming, and the numerical value that is produced when noise is arranged can be very complicated and be difficult for analyzing.
This shows that the system of above-mentioned existing auto-measuring optical response time and method thereof still have many defectives, and demand urgently further being improved.For the system that solves existing auto-measuring optical response time and the defective of method thereof, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but does not see always that for a long time suitable design finished by development, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because the system and the existing defective of method thereof of above-mentioned existing auto-measuring optical response time, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge thereof, actively studied innovation, in the hope of founding a kind of system and method thereof of new auto-measuring optical response time, can improve the system and the method thereof of general existing auto-measuring optical response time, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the defective of system's existence of existing auto-measuring optical response time, and provide a kind of system of new auto-measuring optical response time, technical matters to be solved is to make it use two simple circuit modules and display to be measured to form one to measure the loop, and can reach the function of auto-measuring, thereby be suitable for practicality more, and have the value on the industry.
Another object of the present invention is to, overcome the defective of the method existence of existing auto-measuring optical response time, and provide a kind of method of new auto-measuring optical response time, technical matters to be solved is to make it use three light sensing component simultaneously, detect the photoinduction signal of three zoness of different on the display pannel to be measured respectively, and then three photoinduction signals are compared computing, calculating optical response time, and can reach the function that shortens the measurement time.
The object of the invention to solve the technical problems realizes by the following technical solutions.The system of a kind of auto-measuring optical response time that proposes according to the present invention is applicable to measure a display that this system comprises: a detecting module, in order to an optical response time of the grey-tone image that measures this display; An and control module, in order to receive and to store this optical response time that this detecting module measures, this control module changes this grey-tone image of this display, and this detecting module then continues to measure this optical response time of this grey-tone image of this display after the change.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The system of aforesaid auto-measuring optical response time, wherein said detecting module comprises: a grey-tone image initial value measures the unit, in order to measure one first partly one first smooth GTG value of this display, to export a grey-tone image initial value; One grey-tone image end value measures the unit, in order to measure one second partly one second smooth GTG value of this display, to export a grey-tone image end value; One grey-tone image changing value measures the unit, in order to measure one the 3rd partly one the 3rd smooth GTG value of this display, to export a grey-tone image changing value; One ratio circuit, couple an output terminal of this grey-tone image initial value measurement unit and this grey-tone image end value measurement unit, in order to receive this grey-tone image initial value and this grey-tone image end value, to export a counting starting value and a counting end value, this counting starting value and this counting end value are the predetermined ratios in this grey-tone image initial value and this grey-tone image end value; And a comparator circuit, in order to utilize this counting starting value, this counting end value and this grey-tone image changing value, compare computing, to export one first signal and one second signal relatively relatively.
The system of aforesaid auto-measuring optical response time, the grey-tone image initial value of wherein said detecting module measures the unit and comprises: a light sensing component, be to be an optical diode, in order to measuring this first partly this first smooth GTG value of this display, and this measured first smooth GTG value is converted to an initial value electric current; One electric current changes potential circuit, in order to receiving this initial value electric current, and is voltage with this initial value current conversion, and output one is threshold voltage just; And a voltage amplifier circuit, in order to receive and to amplify threshold voltage just, to export this grey-tone image initial value.
The system of aforesaid auto-measuring optical response time, the grey-tone image initial value of wherein said detecting module measures this first part of this display that the unit measures, is 1/3rd scopes for the leftmost side of this display pannel.
The system of aforesaid auto-measuring optical response time, the grey-tone image end value of wherein said detecting module measures the unit and comprises: a light sensing component, be to be an optical diode, in order to measuring this second partly this second smooth GTG value of this display, and this measured second smooth GTG value is converted to a final value electric current; One electric current changes potential circuit, in order to receiving this final value electric current, and is voltage with this final value current conversion, exports a final value voltage; And a voltage amplifier circuit, in order to receive and to amplify this final value voltage, to export this grey-tone image end value.
The system of aforesaid auto-measuring optical response time, the grey-tone image end value of wherein said detecting module measure this second part of this display that the unit measures, are the middle(-)third scopes for this display pannel.
The system of aforesaid auto-measuring optical response time, the grey-tone image changing value of wherein said detecting module measures the unit and comprises: a light sensing component, be to be an optical diode, in order to measuring the 3rd partly the 3rd smooth GTG value of this display, and the 3rd measured smooth GTG value is converted to a variable-current; One electric current changes potential circuit, in order to receiving this variable-current, and this variable-current is converted to voltage, and output one changes voltage; And a voltage amplifier circuit, in order to receive and to amplify this variation voltage, to export this grey-tone image changing value.
The system of aforesaid auto-measuring optical response time, the grey-tone image changing value of wherein said detecting module measures the 3rd part of this display that the unit measures, and is 1/3rd scopes for the rightmost side of this display pannel.
The system of aforesaid auto-measuring optical response time, the ratio circuit of wherein said detecting module, be to be a series connection resistance circuit, comprising: one first resistance, one first end of this first resistance couples this output terminal that this grey-tone image initial value measures the unit, one second end output, the one counting end value of this first resistance; One second resistance, one first end of this second resistance couples this second end of this first resistance, one second end output, the one counting starting value of this second resistance; And one the 3rd resistance, one first end of the 3rd resistance couples this second end of this second resistance, and one second end of the 3rd resistance couples this output terminal that this grey-tone image end value measures the unit.
The system of aforesaid auto-measuring optical response time, in the ratio circuit of wherein said detecting module, the resistance ratio of this first resistance of this resistance in series circuit, this second resistance and the 3rd resistance is 1: 8: 1.
The system of aforesaid auto-measuring optical response time, this counting starting value of wherein said ratio circuit output for after this grey-tone image initial value deducts this grey-tone image end value, multiply by 10, adds this grey-tone image initial value.
The system of aforesaid auto-measuring optical response time, this counting end value of wherein said ratio circuit output for after this grey-tone image initial value deducts this grey-tone image end value, multiply by 90 percent, adds this grey-tone image initial value.
The system of aforesaid auto-measuring optical response time, the comparator circuit of wherein said detecting module comprises: one first comparer, in order to receive this grey-tone image changing value and this counting end value, when this grey-tone image changing value was counted end value greater than this, an output signal of this first comparer can carry out the signal transition; And one second comparer, in order to receiving this grey-tone image changing value and this counting starting value, when this grey-tone image changing value during greater than this counting starting value, an output signal of this second comparer can carry out the signal transition.
The system of aforesaid auto-measuring optical response time, this first comparer of the comparator circuit of wherein said detecting module, be to be an operational amplifier, have a positive input terminal, a negative input end and an output terminal, this positive input terminal is in order to receive this grey-tone image changing value, this negative input end is in order to receive this counting end value, and this output terminal is in order to export this first comparison signal.
The system of aforesaid auto-measuring optical response time, this second comparer of the comparator circuit of wherein said detecting module, be to be an operational amplifier, have a positive input terminal, a negative input end and an output terminal, this negative input end is in order to receive this grey-tone image transformed value, this positive input terminal is in order to receive this counting starting value, and this output terminal is in order to export this second comparison signal.
The system of aforesaid auto-measuring optical response time, this first signal and this second signal relatively relatively that wherein said control module receives that this comparator circuit of this detecting module exports, wherein this control module comprises: a reaction time counting unit, in order to receive and to calculate this first comparison signal and this second mistiming of comparing signal, to export this optical response time; One coefficient access unit is in order to receive and to store this optical response time; One image generation unit is in order to change a test grey-tone image; And a status unit, couple this image generation unit and this coefficient access unit, in order to control the operation workflow of this system, to form an auto-measuring loop.
The system of aforesaid auto-measuring optical response time, this reaction time counting unit of wherein said control module comprises: a logic lock, in order to utilize relatively this first signal and this second signal relatively relatively, output one counting is judged signal; And an optical response time counter, judge the mistiming of signal transition in order to utilize this counting, calculate this optical response time of this display.
The system of aforesaid auto-measuring optical response time, this coefficient access unit of wherein said control module is to store this optical response time with an EEROM.
The system of aforesaid auto-measuring optical response time, this image generation unit of wherein said control module, be to produce this test grey-tone image to this display, so that this of this display first partly shows the most initial image of this test grey-tone image, the final image that this second part shows this test grey-tone image, and the 3rd part shows the change procedure of this test grey-tone image.
The object of the invention to solve the technical problems also adopts following technical scheme to realize.The method for measurement of a kind of auto-measuring optical response time that proposes according to the present invention, be applicable to the optical response time that measures and store a display, and form an auto-measuring loop, this method for measurement may further comprise the steps: transmit a grey-tone image to this display, make one first of this display partly show the initial grey-tone image of this grey-tone image, one second of this display partly shows the final grey-tone image of this grey-tone image, and one the 3rd of this display partly shows the conversion process of this grey-tone image; Utilize three light sensing component this first part, this second part and the 3rd photoinduction signal partly of this display of sensing respectively simultaneously; Three photoinduction signals are converted to voltage signal respectively, compare computing, to calculate an optical response time; Store this optical response time; And this grey-tone image that changes this display, with this optical response time of this grey-tone image of this display after continue to measure changing.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, in order to reach aforementioned goal of the invention, major technique of the present invention thes contents are as follows:
The present invention proposes a kind of system of auto-measuring optical response time, this system is made up of detecting module and control module, the detecting module of this system is in order to the optical response time of the grey-tone image that measures this display, control module is then in order to receive and to store the optical response time that this detecting module measures, then control module changes display grey-tone image originally, detecting module then continues to measure the optical response time of the grey-tone image of the display after the change then, so forms an auto-measuring loop.
Wherein, the detecting module of this system comprises that the grey-tone image initial value measures the unit, the grey-tone image end value measures unit, grey-tone image changing value measuring value unit, ratio circuit, and comparator circuit.This grey-tone image initial value measures unit, in order to measure first partly the light GTG value of this display, with output grey-tone image initial value.This grey-tone image end value measures unit, in order to measure second partly the light GTG value of this display, with output grey-tone image end value.This grey-tone image changing value measures unit, in order to measure the 3rd partly light GTG value of this display, with output grey-tone image changing value.This ratio circuit couples the output terminal that this grey-tone image initial value measures unit and this grey-tone image end value measurement unit, in order to receive this grey-tone image initial value and this grey-tone image end value, with output counting starting value and counting end value.This comparator circuit in order to utilize counting starting value, counting end value and grey-tone image changing value, compares computing, compares relatively signal of signal and second to export first.
Wherein, the control module of this system comprises reaction time counting unit, coefficient access unit, image generation unit, and status unit.This reaction time counting unit compares the signal and second mistiming of comparing signal in order to receive and to calculate first, with the output optical response time.This coefficient access unit is in order to receive and to store this optical response time.This image generation unit is in order to change the grey-tone image of test.This status unit couples image generation unit and coefficient access unit, in order to control the operation workflow of this system, to form an auto-measuring loop.
In the preferred embodiment of the present invention, the grey-tone image initial value of this detecting module measures the unit, comprises that light sensing component, electric current change potential circuit and voltage amplifier circuit.This light sensing component is to be an optical diode, in order to measuring first partly the light GTG value of this display, and measured light GTG value is converted to the initial value electric current.This electric current changes potential circuit in order to receiving the initial value electric current, and is voltage with the initial value current conversion, to export threshold voltage just.This voltage amplifier circuit is in order to receive and to amplify threshold voltage just, with output grey-tone image initial value.
In one embodiment, the grey-tone image end value of this detecting module measures the unit, comprises that light sensing component, electric current change potential circuit and voltage amplifier circuit.This light sensing component is to be an optical diode, in order to measuring second partly the light GTG value of this display, and measured light GTG value is converted to the final value electric current.This electric current changes potential circuit in order to receiving the final value electric current, and is voltage with the final value current conversion, with output final value voltage.This voltage amplifier circuit is in order to receive and to amplify final value voltage, with output grey-tone image end value.
In one embodiment, the grey-tone image changing value of this detecting module measures the unit, comprises that light sensing component, electric current change potential circuit and voltage amplifier circuit.This light sensing component is to be an optical diode, in order to measuring the 3rd partly light GTG value of this display, and measured light GTG value is converted to variable-current.This electric current changes potential circuit in order to receiving variable-current, and is voltage with the conversion current conversion, changes voltage with output.This voltage amplifier circuit is in order to receive and to amplify this variation voltage, with output grey-tone image changing value.
In one embodiment, the ratio circuit of this detecting module is for a series connection resistance circuit, comprises first resistance, second resistance, and the 3rd resistance.First end of this first resistance couples the output terminal that the grey-tone image initial value measures the unit, second end output counting end value.First end of this second resistance couples second end of first resistance, second end output counting starting value.The 3rd resistance first end couples second end of this second resistance, and second end of the 3rd resistance couples the output terminal that the grey-tone image end value measures the unit.Wherein, the resistance ratio of first resistance of this resistance in series circuit, second resistance and the 3rd resistance is 1: 8: 1.
In one embodiment, the comparator circuit of detecting module comprises that first comparer and second is than device in the native system.This first comparer is to be operational amplifier, and in order to receiving this grey-tone image changing value and this counting end value, when grey-tone image changing value during greater than the counting end value, the output signal of first comparer can carry out the signal transition.This second comparer is to be operational amplifier, and in order to receiving grey-tone image changing value and counting starting value, when grey-tone image changing value during greater than the counting starting value, an output signal of second comparer can carry out the signal transition.
In one embodiment, the reaction time counting unit of this control module comprises logic lock and optical response time counter.This logic lock utilization is compared first and is compared relatively signal of signal and second, and with output counting judgement signal, the mistiming of judging the signal transition is counted in the utilization of optical response time counter, calculates the optical response time of this display.
In one embodiment, the image generation unit of control module is to produce the test grey-tone image to display in the native system, so that showing the most initial image, second of this test grey-tone image, first part of this display partly shows the final image of this test grey-tone image, the 3rd change procedure that then shows this test grey-tone image.
For reaching above-mentioned purpose of the present invention, the present invention also proposes a kind of method for measurement of auto-measuring optical response time, be applicable to the optical response time that measures and store a display, and form an auto-measuring loop, the step of this method for measurement comprises that transmission one grey-tone image is to display, make first of this display partly show the initial grey-tone image of grey-tone image, second of this display partly shows the final grey-tone image of grey-tone image, and the 3rd of this display partly shows the conversion process of grey-tone image; Utilize three light sensing component to distinguish first part of this display of sensing, second part and the 3rd photoinduction signal partly simultaneously then, again three photoinduction signals are converted to voltage signal respectively, compare computing, to calculate optical response time, store optical response time then; At last, change the grey-tone image of this display, measure the optical response time of the grey-tone image of the display after changing with continuation.
Via as can be known above-mentioned, the system of auto-measuring optical response time of the present invention comprises detecting module and control module, is connected to form one with display to be measured and measures the loop.Native system is to utilize detecting module to measure two light intensity weakly heterogeneous voltages that grey-tone image changes front and back, through electric resistance partial pressure as standard of comparison, changing the light intensity light current pressure that is measured with grey-tone image compares, also stored to obtain optical response time fast, and can be reached the function of auto-measuring.Use this system, can reach the optical response time of realizing measuring display with lower cost and fast speeds.
By technique scheme, the system of the auto-measuring optical response time that proposes according to the present invention, form one with two simple circuit modules and a display to be measured and measure the loop, utilize two light intensity weakly heterogeneous voltages of video conversion front and back, through electric resistance partial pressure as standard of comparison, changing the light intensity light current pressure that is measured with grey-tone image compares, to obtain optical response time fast, and can reach the function of auto-measuring, use so mode, can realize the measurement of the optical response time of display with lower cost and fast speeds.The method for measurement of the auto-measuring optical response time that proposes according to the present invention, be with the initial grey-tone image of one group of grey-tone image, final grey-tone image and grey-tone image conversion process, be sent to three different zones on the display to be measured, use three light sensing component then respectively, detect the photoinduction signal of these three zoness of different on the display pannel to be measured, and then three photoinduction signals are converted to voltage signal, compare computing, to calculate optical response time, so to reach the function that shortens the measurement time.
In sum, the system of auto-measuring optical response time of the present invention uses two simple circuit modules and display to be measured to form one and measures the loop, and can reach the function of auto-measuring; The method of auto-measuring optical response time of the present invention, use three light sensing component simultaneously, detect the photoinduction signal of three zoness of different on the display pannel to be measured respectively, and then three photoinduction signals are compared computing, calculating optical response time, and can reach the function that shortens the measurement time.It has above-mentioned many advantages and practical value, and in homogeneous system and method, do not see have similar structural design and method to publish or use and really genus innovation, no matter it all has bigger improvement on system architecture, method or function, have large improvement technically, and produced handy and practical effect, and the system of more existing auto-measuring optical response time and method thereof have the multinomial effect of enhancement, thereby be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.
Description of drawings
Fig. 1 is the calcspar according to the system of the auto-measuring optical response time of the preferred embodiment of the present invention's proposition.
Fig. 2 is according to the detecting module of the system of the auto-measuring optical response time of the preferred embodiment of the present invention's proposition and the circuit diagram of reaction time counting unit.
Fig. 3 is the ornaments location drawing according to the light sensing component of the system of the auto-measuring optical response time of the preferred embodiment of the present invention's proposition.
Fig. 4 is the process flow diagram according to the method for measurement of the auto-measuring optical response time of the present invention's proposition.
10: detecting module 12: control module
14: display 16 to be measured: the grey-tone image changing value measures the unit
18: the grey-tone image end value measures unit 20: the grey-tone image initial value measures the unit
22: ratio circuit 24: comparator circuit
26: image generation unit 28: status unit
30: coefficient access unit 32: reaction time counting unit
34:EEROM 36: optical diode
38: electric current changes potential circuit 40: voltage amplifier circuit
42: optical diode 44: electric current changes potential circuit
46: voltage amplifier circuit 48: optical diode
50: electric current changes potential circuit 52: voltage amplifier circuit
56: the second comparers of 54: the first comparers
58: logic lock 60: the optical response time counter
R1: 2: the second resistance of first resistance R
R3: the 3rd resistance
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, system and its concrete structure of method, method, step, feature and the effect thereof of the auto-measuring optical response time that foundation the present invention is proposed, describe in detail as after.
Seeing also shown in Figure 1ly, is the calcspar according to the system of the auto-measuring optical response time of a preferred embodiment of the present invention.Native system is made up of detecting module 10 and control module 12, and is connected to form a measurement loop with display 14 to be measured.
Wherein, the detecting module of this system comprises that the grey-tone image initial value measures unit 20, the grey-tone image end value measures unit 18, grey-tone image changing value measuring value unit 16, ratio circuit 22, and comparator circuit 24.The grey-tone image initial value measures the unit in order to measure first partly the GTG value of this display, with output grey-tone image initial value.The grey-tone image end value measures the unit in order to measure second partly the light GTG value of this display, with output grey-tone image end value.The grey-tone image changing value measures the unit in order to measure the 3rd partly light GTG value of this display, with output grey-tone image changing value.Ratio circuit couples the output terminal that this grey-tone image initial value measures unit and this grey-tone image end value measurement unit, in order to receive this grey-tone image initial value and grey-tone image end value, with output counting starting value and counting end value, counting starting value and counting end value are the predetermined ratios in this grey-tone image initial value and this grey-tone image end value.Comparator circuit compares computing in order to utilize counting starting value, counting end value and grey-tone image changing value, compares relatively signal of signal and second to export first.
The reaction time counting unit 32 of the control module of this system, compare the signal and second mistiming of comparing signal in order to receive and to calculate first, with the output optical response time, coefficient access unit 30 is in order to receive and to store this optical response time, in the present embodiment, the coefficient access unit of native system is to store this optical response time with EEROM 34.Image generation unit 26 is tested grey-tone image in order to change one, and status unit 28 couples image generation unit and coefficient access unit, in order to control the operation workflow of this system, to form an auto-measuring loop.
Seeing also shown in Figure 2ly, is according to the detecting module of the system of the auto-measuring optical response time of preferred embodiment proposed by the invention and the circuit diagram of reaction time counting unit.The grey-tone image initial value of detecting module measurement unit comprises light sensing component 36 in the native system, be to be optical diode, in order to measure first partly the light GTG value of this display, and the first measured smooth GTG value is converted to the initial value electric current is sent to electric current and changes potential circuit 38, after electric current changes potential circuit reception initial value electric current, can be voltage with the initial value current conversion, and the first threshold voltage of output, voltage amplifier circuit 40 receives and amplifies threshold voltage just then, with output grey-tone image initial value.
The grey-tone image end value of detecting module measurement unit comprises light sensing component 42 in the native system, be to be optical diode, in order to measure second partly the light GTG value of this display, and measured light GTG value is converted to the final value electric current is sent to electric current and changes potential circuit 44, after electric current changes potential circuit reception final value electric current, can be voltage with the final value current conversion, and output final value voltage, voltage amplifier circuit 46 receives and amplifies this final value voltage then, to export this grey-tone image end value.
The grey-tone image changing value of detecting module measurement unit comprises light sensing component 48 in the native system, be to be optical diode, in order to measure the 3rd partly light GTG value of this display, and measured light GTG value is converted to variable-current is sent to electric current and changes potential circuit 50, after electric current changes potential circuit reception variable-current, variable-current can be converted to voltage, and output changes voltage, voltage amplifier circuit 52 receives and amplifies this variation voltage then, to export this grey-tone image changing value.
The ratio circuit of detecting module is to be a series connection resistance circuit in the native system, comprise first resistance R 1, second resistance R 2, and one first end of the 3rd resistance R 3, the first resistance couples the output terminal that the grey-tone image initial value measures the unit, second end output, one counting end value.First end of second resistance couples second end of first resistance, second end output counting starting value.The 3rd resistance first end couples second end of second resistance, and second end of the 3rd resistance couples the output terminal that the grey-tone image end value measures the unit.Wherein, the resistance ratio of first resistance of this resistance in series circuit, second resistance and the 3rd resistance is 1: 8: 1, the counting starting value of this ratio circuit output that so can make is for after the grey-tone image initial value deducts the grey-tone image end value, multiply by 10, add the grey-tone image initial value, and the counting end value multiply by 90 percent for after the grey-tone image initial value deducts the grey-tone image end value, adds the grey-tone image initial value.
The comparator circuit of detecting module in the native system, comprise that first comparer 54 and second is than device 56, first comparer is to be operational amplifier, have a positive input terminal, a negative input end and an output terminal, positive input terminal is in order to receive the grey-tone image changing value, and negative input end is in order to receive this counting end value, and output terminal compares signal in order to export first, when the grey-tone image changing value greater than counting during end value, the output signal of first comparer can carry out the signal transition.Second comparer is to be an operational amplifier, have a positive input terminal, a negative input end and an output terminal, negative input end is in order to receive the grey-tone image transformed value, positive input terminal is in order to the count pick up starting value, output terminal compares signal in order to export second, when the grey-tone image changing value greater than counting during starting value, the output signal of this second comparer can carry out the signal transition.
The reaction time counting unit of control module comprises logic lock 58 and optical response time counter 60 in the native system.This logic lock utilization is compared first and is compared relatively signal of signal and second, and with output counting judgement signal, the mistiming of judging the signal transition is counted in the utilization of optical response time counter, with the optical response time of calculation display.
Seeing also shown in Figure 3ly, is the ornaments location drawing according to the light sensing component of the system of the auto-measuring optical response time of preferred embodiment proposed by the invention.This grey-tone image initial value measures first part of the display that optical diode measured of unit, be 1/3rd scopes for the leftmost side of this display pannel, and the grey-tone image end value measures second part of the display that optical diode measured of unit, be 1/3rd the most central scopes for this display pannel, the grey-tone image changing value measures the 3rd part of the display that optical diode measured of unit, is 1/3rd scopes for the rightmost side of this display pannel.
In the present embodiment, the image generation unit of control module is to produce the test grey-tone image to display in the native system, so that this display first partly show the most initial image of this test grey-tone image, the final image that second part shows this test grey-tone image, the 3rd change procedure that then shows this test grey-tone image.
Seeing also shown in Figure 4ly, is the process flow diagram of the method for measurement of a kind of auto-measuring optical response time of proposing according to the present invention.In step S100, transmit one group of grey-tone image earlier to display, make first of this display partly show the most initial image of this test grey-tone image, second partly shows the final image of this test grey-tone image, the 3rd change procedure that then shows this test grey-tone image, then at step S110, S120, among the S130, detect the photoinduction signal of three parts of this display respectively, and simultaneously at step S140, S150, among the S160, this photoinduction signal of three groups is converted to voltage signal, and amplified, then in step S170, these three groups of voltages are compared calculating, to obtain the light reaction signal of this display to this grey-tone image, and in step S180, this optical response time is noted, then in step S190, send one group of new grey-tone image to display, and state step again this new grey-tone image is carried out the measurement of optical response time, measure the loop to form one.
In sum, system according to auto-measuring optical response time proposed by the invention, form one with two simple circuit modules and a display to be measured and measure the loop, utilize two light intensity weakly heterogeneous voltages of video conversion front and back, through electric resistance partial pressure as standard of comparison, changing the light intensity light current pressure that is measured with grey-tone image compares, to obtain optical response time fast, and can reach the function of auto-measuring, use so mode, can realize the measurement of the optical response time of display with lower cost and fast speeds.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the method that can utilize above-mentioned announcement and technology contents are made a little change or be modified to the equivalent embodiment of equivalent variations, but every content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (20)
1. the system of an auto-measuring optical response time is applicable to measure a display, it is characterized in that this system comprises:
One detecting module is in order to an optical response time of the grey-tone image that measures this display; And
One control module, in order to receive and to store this optical response time that this detecting module measures, this control module changes this grey-tone image of this display, and then produces one second grey-tone image, and this detecting module then continues to measure an optical response time of this second grey-tone image of this display.
2. the system of auto-measuring optical response time according to claim 1 is characterized in that wherein said detecting module comprises:
One grey-tone image initial value measures the unit, in order to measure one first partly one first smooth GTG value of this display, to export a grey-tone image initial value;
One grey-tone image end value measures the unit, in order to measure one second partly one second smooth GTG value of this display, to export a grey-tone image end value;
One grey-tone image changing value measures the unit, in order to measure one the 3rd partly one the 3rd smooth GTG value of this display, to export a grey-tone image changing value;
One ratio circuit, couple this grey-tone image initial value and measure the output terminal of unit and the output terminal that this grey-tone image end value measures the unit, in order to receive this grey-tone image initial value and this grey-tone image end value, to export a counting starting value and a counting end value, this counting starting value and this counting end value are the predetermined ratios in this grey-tone image initial value and this grey-tone image end value; And
One comparator circuit in order to utilize this counting starting value, this counting end value and this grey-tone image changing value, compares computing, compares relatively signal of signal and one second to export one first.
3. the system of auto-measuring optical response time according to claim 2 is characterized in that the grey-tone image initial value measurement unit of wherein said detecting module comprises:
One light sensing component is to be an optical diode, in order to measuring this first partly this first smooth GTG value of this display, and this measured first smooth GTG value is converted to an initial value electric current;
One electric current changes potential circuit, in order to receiving this initial value electric current, and is voltage with this initial value current conversion, and output one is threshold voltage just; And
One voltage amplifier circuit is in order to receive and to amplify threshold voltage just, to export this grey-tone image initial value.
4. the system of auto-measuring optical response time according to claim 2, it is characterized in that the grey-tone image initial value of wherein said detecting module measures this first part of this display that the unit measures, is 1/3rd scopes for the leftmost side of this display pannel.
5. the system of auto-measuring optical response time according to claim 2 is characterized in that the grey-tone image end value measurement unit of wherein said detecting module comprises:
One light sensing component is to be an optical diode, in order to measuring this second partly this second smooth GTG value of this display, and this measured second smooth GTG value is converted to a final value electric current;
One electric current changes potential circuit, in order to receiving this final value electric current, and is voltage with this final value current conversion, exports a final value voltage; And
One voltage amplifier circuit is in order to receive and to amplify this final value voltage, to export this grey-tone image end value.
6. the system of auto-measuring optical response time according to claim 2, it is characterized in that the grey-tone image end value of wherein said detecting module measures this second part of this display that the unit measures, is the middle(-)third scope for this display pannel.
7. the system of auto-measuring optical response time according to claim 2 is characterized in that the grey-tone image changing value measurement unit of wherein said detecting module comprises:
One light sensing component is to be an optical diode, in order to measuring the 3rd partly the 3rd smooth GTG value of this display, and the 3rd measured smooth GTG value is converted to a variable-current;
One electric current changes potential circuit, in order to receiving this variable-current, and this variable-current is converted to voltage, and output one changes voltage; And
One voltage amplifier circuit is in order to receive and to amplify this variation voltage, to export this grey-tone image changing value.
8. the system of auto-measuring optical response time according to claim 2, it is characterized in that the grey-tone image changing value of wherein said detecting module measures the 3rd part of this display that the unit measures, is 1/3rd scopes for the rightmost side of this display pannel.
9. the system of auto-measuring optical response time according to claim 2 is characterized in that the ratio circuit of wherein said detecting module, is to be a series connection resistance circuit, comprising:
One first resistance, one first end of this first resistance couple the output terminal that this grey-tone image initial value measures the unit, one second end output, the one counting end value of this first resistance;
One second resistance, one first end of this second resistance couples this second end of this first resistance, one second end output, the one counting starting value of this second resistance; And
One the 3rd resistance, one first end of the 3rd resistance couples this second end of this second resistance, and one second end of the 3rd resistance couples the output terminal that this grey-tone image end value measures the unit.
10. the system of auto-measuring optical response time according to claim 9, it is characterized in that in the ratio circuit of wherein said detecting module that the resistance ratio of this first resistance of this resistance in series circuit, this second resistance and the 3rd resistance is 1: 8: 1.
11. the system of auto-measuring optical response time according to claim 2, this counting starting value that it is characterized in that wherein said ratio circuit output, for after this grey-tone image initial value deducts this grey-tone image end value, multiply by 10, add this grey-tone image initial value.
12. the system of auto-measuring optical response time according to claim 2, this counting end value that it is characterized in that wherein said ratio circuit output, for after this grey-tone image initial value deducts this grey-tone image end value, multiply by 90 percent, add this grey-tone image initial value.
13. the system of auto-measuring optical response time according to claim 2 is characterized in that the comparator circuit of wherein said detecting module comprises:
One first comparer, in order to receive this grey-tone image changing value and this counting end value, when this grey-tone image changing value was counted end value greater than this, an output signal of this first comparer can carry out the signal transition; And
One second comparer, in order to receive this grey-tone image changing value and this counting starting value, when this grey-tone image changing value was counted starting value greater than this, an output signal of this second comparer can carry out the signal transition.
14. the system of auto-measuring optical response time according to claim 13, this first comparer that it is characterized in that the comparator circuit of wherein said detecting module, be to be an operational amplifier, have a positive input terminal, a negative input end and an output terminal, this positive input terminal is in order to receive this grey-tone image changing value, this negative input end is in order to receive this counting end value, and this output terminal is in order to export this first comparison signal.
15. the system of auto-measuring optical response time according to claim 13, this second comparer that it is characterized in that the comparator circuit of wherein said detecting module, be to be an operational amplifier, have a positive input terminal, a negative input end and an output terminal, this negative input end is in order to receive this grey-tone image transformed value, this positive input terminal is in order to receive this counting starting value, and this output terminal is in order to export this second comparison signal.
16. the system of auto-measuring optical response time according to claim 2, this first signal and this second signal relatively relatively that it is characterized in that wherein said control module receives that this comparator circuit of this detecting module exports, wherein this control module comprises:
One reaction time counting unit is in order to receive and to calculate this first comparison signal and this second mistiming of comparing signal, to export this optical response time;
One coefficient access unit is in order to receive and to store this optical response time;
One image generation unit is in order to change a test grey-tone image; And
One status unit couples this image generation unit and this coefficient access unit, in order to control the operation workflow of this system, to form an auto-measuring loop.
17. the system of auto-measuring optical response time according to claim 16 is characterized in that this reaction time counting unit of wherein said control module comprises:
One logic lock, in order to utilize relatively this first signal and this second signal relatively relatively, output one counting is judged signal; And
One optical response time counter is judged the mistiming of signal transition in order to utilize this counting, calculates this optical response time of this display.
18. the system of auto-measuring optical response time according to claim 16 is characterized in that this coefficient access unit of wherein said control module, is to store this optical response time with an EEROM.
19. the system of auto-measuring optical response time according to claim 16, this image generation unit that it is characterized in that wherein said control module, be to produce this test grey-tone image to this display, so that this of this display first partly shows the most initial image of this test grey-tone image, the final image that this second part shows this test grey-tone image, and the 3rd part shows the change procedure of this test grey-tone image.
20. the method for measurement of an auto-measuring optical response time is applicable to the optical response time that measures and store a display, and forms an auto-measuring loop, it is characterized in that this method for measurement may further comprise the steps:
Transmit a grey-tone image to this display, make one first of this display partly show the initial grey-tone image of this grey-tone image, one second of this display partly shows the final grey-tone image of this grey-tone image, and one the 3rd of this display partly shows the conversion process of this grey-tone image;
Utilize three light sensing component this first part, this second part and the 3rd photoinduction signal partly of this display of sensing respectively simultaneously;
Three photoinduction signals are converted to voltage signal respectively, compare computing, to calculate an optical response time;
Store this optical response time; And
Change the grey-tone image of this display, measure the optical response time of the grey-tone image of this display after changing with continuation.
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| CNB2003101230267A CN100397054C (en) | 2003-12-23 | 2003-12-23 | System and method for automatically measuring light reaction time |
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| CNB2003101230267A CN100397054C (en) | 2003-12-23 | 2003-12-23 | System and method for automatically measuring light reaction time |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6377237B1 (en) * | 2000-01-07 | 2002-04-23 | Agilent Technologies, Inc. | Method and system for illuminating a layer of electro-optical material with pulses of light |
| US6460009B1 (en) * | 2000-02-28 | 2002-10-01 | John C Rowland | Time delay measurement for response system |
| US20030117131A1 (en) * | 2001-12-13 | 2003-06-26 | Lg. Philips Lcd Co., Ltd. | Method and apparatus for measuring response time of liquid crystal display device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6377237B1 (en) * | 2000-01-07 | 2002-04-23 | Agilent Technologies, Inc. | Method and system for illuminating a layer of electro-optical material with pulses of light |
| US6460009B1 (en) * | 2000-02-28 | 2002-10-01 | John C Rowland | Time delay measurement for response system |
| US20030117131A1 (en) * | 2001-12-13 | 2003-06-26 | Lg. Philips Lcd Co., Ltd. | Method and apparatus for measuring response time of liquid crystal display device |
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