CN101806656B - Luminosity response characteristics measuring instrument of notebook computer liquid crystal display screen - Google Patents

Luminosity response characteristics measuring instrument of notebook computer liquid crystal display screen Download PDF

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Publication number
CN101806656B
CN101806656B CN2010101199796A CN201010119979A CN101806656B CN 101806656 B CN101806656 B CN 101806656B CN 2010101199796 A CN2010101199796 A CN 2010101199796A CN 201010119979 A CN201010119979 A CN 201010119979A CN 101806656 B CN101806656 B CN 101806656B
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module
notebook computer
liquid crystal
usb
crystal display
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CN101806656A (en
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杨晓伟
李晓华
张宇宁
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Southeast University
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Southeast University
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Abstract

The invention discloses a luminosity response characteristics measuring instrument of a notebook computer liquid crystal display screen, which is a special device for measuring luminosity transient response characteristics of the note book computer liquid crystal display screen. A notebook computer (1) comprises an image measuring module and a data calculating module; the image measuring module in the notebook computer (1) transmits image data to a liquid crystal display screen and transmits a measurement command to a USB (universal serial bus) module (5) through a USB interface, a programmable photoelectric amplifier module (2) acquires a luminosity signal of the notebook computer liquid crystal display screen and converts the luminosity signal into a voltage signal, an A/D (analog/digital) conversion module (3) converts and simulates the voltage into a digital voltage signal, an FPGA (field programmable gate array) module (4) acquires and caches the digital voltage signal, controls the correction of scale span of the controllable programmable photoelectric amplifier module (2) and triggers the timing conversion of the A/D conversion module (3), the USB module (5) transmits the digital voltage signal to the notebook computer (1) through the USB interface, and the data calculation module in the notebook computer calculates liquid crystal response rising/descending time and blur edge rising/descending time.

Description

Luminosity response characteristics measuring instrument of notebook computer liquid crystal display screen
Technical field
The present invention is a kind of measuring instrument that is used to measure the notebook computer liquid crystal display screen luminosity response characteristics, belongs to showing technical field of measurement and test.
Background technology
One of method of assessment LCD correction of motion artefacts is to measure luminosity response characteristics.Because notebook computer liquid crystal display screen does not dispose digital visual interface (DVI) or Video Graphics Array interface (VGA), therefore measuring the required resolution chart of its luminosity response characteristics can only be produced by laptop computer applications software, and can not receive the resolution chart signal that the outer video signal generator provides.
The data acquisition of measuring the brightness of display screen response characteristic should be controlled by the synchronous triggering signal that flying-spot video generator provides, otherwise the measuring method that can't realize the multiple averaging image data is to eliminate noise signal.The resolution chart that laptop computer applications software produces can not provide the data acquisition of synchronous triggering signal control luminosity response characteristics, thereby can not use the measuring method of multiple averaging image data.
Summary of the invention
Technical matters: the measuring instrument that the purpose of this invention is to provide a kind of notebook computer liquid crystal display screen luminosity response characteristics.It is made up of notebook computer, programmable optical electric amplifier module, A/D modular converter, on-site programmable gate array FPGA module, USB module, and notebook computer contains resolution chart module and data computation module.Measuring process realizes image generation, opto-electronic conversion, analog to digital conversion, acquisition controlling, data transmission, calculation of parameter.
Technical scheme: luminosity response characteristics measuring instrument of notebook computer liquid crystal display screen of the present invention is in series ringwise and is connected to form by notebook computer, programmable optical electric amplifier module, A/D modular converter, on-site programmable gate array FPGA module, USB module, contains resolution chart module and data computation module in the notebook computer.Resolution chart module in the notebook computer is to liquid crystal display transmitted image data, transmit measuring command through USB interface to the USB module, programmable optical electric amplifier module is gathered the notebook computer liquid crystal display screen luminance signal and is changed voltage signal into, through A/D modular converter switch analog voltages signal is digital voltage signal, the FPGA module collection poke word voltage signal that eases up, the full scale of control programmable optical electric amplifier module is proofreaied and correct, trigger the timing conversion of A/D modular converter, the USB module transmits digital voltage signal to notebook computer through USB interface, and the data computation module in the notebook computer is calculated liquid crystal response rising/fall time and fuzzy edge rising/fall time.
In notebook computer, the image display module of resolution chart module application DirectX SDK SDK (Software Development Kit) design is based on the programming mode of microsoft foundation class storehouse MFC document-view: 1) control interface input resolution format of display, display graphics size, red/green/indigo plant and gray scale selection, display refresh rates selection, Gray Level Jump grade, Gray Level Jump time etc., the control interface enters consistency operation when 2) measuring beginning, the resolution chart that shows the transient state saltus step on the screen, 3) notebook computer passes measuring command to the FPGA module under USB interface; Data computation module is carried out after the timing acquiring of finishing the luminosity response characteristics data: 1) transient state saltus step resolution chart program is out of service, 2) the control interface enters foregrounding and waits for upload command, 3) according to upload command, notebook computer is through the luminosity response characteristics data of USB interface reception from the USB module, 4) calculate liquid crystal response rise time/fall time LCRT-rising time/LCRT-falling time and fuzzy edge rise time/fall time BET-risingtime/BET-falling time, and in control interface output result of calculation.
In programmable optical electric amplifier module, photodiode D 1Negative pole connect the inverting input that simulation ground, positive pole meet amplifier U1A, resistance R 1, capacitor C 1An end and connect negative input end pin 2, the resistance R of U1A 1, capacitor C 1The other end and connect the output terminal pin 6 of U1A, the in-phase input end of amplifier U1A connects simulation ground, resistance R 2The output terminal pin 6 of a termination amplifier U1A, the other end and connecting resistance R 3, capacitor C 6An end, the in-phase input end of amplifier U1B meets R 3The other end, capacitor C 7An end, capacitor C 6, C 7The other end and connect simulation ground, the end of the inverting input of amplifier U1B and connecting resistance R5, the sliding end pin 5 of digital regulation resistance UID and high-end pin 3, resistance R 4The low side pin 6 of a termination amplifier U1D, R 4Another termination simulation ground, the increment control end pin 1 that the depreciation control end pin 2 of digital regulation resistance U1D meets Pin85, amplifier U1D meets Pin96, Enable Pin pin 7 ground connection of amplifier U1D, the output terminal pin 6 of amplifier U1B and the other end, the resistance R of connecting resistance R5 6An end, the inverting input pin 2 of amplifier U1C also meets R 6The other end, resistance R 7An end, capacitor C 12An end, the in-phase input end pin 3 connecting resistance R of amplifier U1C 8, R 8Another termination simulation ground, output terminal pin 6 and the connecting resistance R of amplifier U1C 7, capacitor C 12The other end and the output terminals A mp-out of this module.
In the A/D modular converter, Amp-out end and connecting resistance R 9, resistance R 11An end, the in-phase input end 8 of differential driver U2A also meets R 11The other end, resistance R 13An end, the reversed-phase output pin 5 of differential driver U2A also meets R 13The other end, resistance R 17An end, the inverting input pin 1 of differential driver U2A and connecting resistance R 12, resistance R 14An end, R 12Other end connecting resistance R 10An end, R 10Another termination simulation ground, the in-phase output end pin 4 of differential driver U2A also meets R 14The other end, resistance R 16An end, the analog input anode pin 23 of A/D converter U2B also meets R 16The other end, capacitor C 28An end, the analog input negative terminal pin 24 of differential driver U2B meets R 17The other end, capacitor C 28The other end, the common mode electrical level end pin 22 of differential driver U2B also connects capacitor C 27An end, the in-phase input end pin 3 of amplifier U2C, C 27Another termination simulation ground, the inverting input pin 2 of differential driver U2C also connects output terminal pin 6, the resistance R of differential driver U2C 15An end, R 15The other end and connect capacitor C 18An end, the common mode electrical level end pin 2 of differential driver U2A, capacitor C 18Another termination simulation ground, resistance R 0Termination simulation ground, resistance R 0Another termination digitally, the digital output end pin 13..10 of differential driver U2B runs in and hinders 1～4 end of RP1, output terminals A DC_IO1～the ADC_IO4 of 8～5 these modules of termination of RP1, the digital output end pin 9..6 of differential driver U2B runs in and hinders 1～4 end of RP2, output terminals A DC_IO5～the ADC_IO8 of 8～5 these modules of termination of RP2, the digital output end pin 5..2 of differential driver U2B runs in and hinders 1～4 end of RP3, output terminals A DC_IO9～the ADC_IO12 of 8～5 these modules of termination of RP3, the clock end 1 connecting resistance R of U2B 18An end, resistance R 18The input end of clock ADC_CLK of another this module of termination, the data of differential driver U2B are overflowed end pin 14 connecting resistance R 19An end, resistance R 19Another this module of termination overflow output terminal OTR.
In the FPGA module, ADC_IO1～ADC_IO12 meets the I/O mouth pin 129..134 of fpga chip U3A, and 139..144, ADC_CLK connect I/O mouth 119 pin of U3A, OTR connects I/O mouth 128 pin of U3A, and the sheet of FPGA configuring chip U3B choosing end 1 and the sheet that meets U3A select output pin 12, resistance R 20An end, the clock end pin 6 of fpga chip U3B connects the clock pin 24 of U3A, the data input pin pin 5 of U3B connects the data output pin 25 of U3A, the data output end pin 2 of fpga chip U3B connects the data input pin 13 of fpga chip U3A, the output terminal pin 3 that crystal oscillator U3C connects connects the clock input pin 17 of fpga chip U3A, the address input end pin 1..5 of buffer U3D, 18..27,42..44 meet the I/O mouth pin 1..7 of U3A, 10..11,26..36, the bi-directional data end pin 7..16 of buffer U3D, 29..32 35..38 meets the I/O mouth 37..42 of U3A, 47..53,56..58 pin, the output enable end pin 41 of U3D connects I/O mouth 59 pin of U3A, and U3D writes I/O mouth 60 pin that Enable Pin pin 17 meets U3A, and the sheet choosing end 6 of U3D connects I/O mouth 61 pin of U3A, Pin96 connects I/O mouth 96 pin of U3A, Pin85 connects I/O mouth 85 pin of U3A, and the I/O mouth 62 of U3A, 67..73 pin meet the bi-directional data end pin USB_D of this module 0..USB_D 7The I/O mouth 74..78 pin of U3A meets output terminal USB_RD, USB_WR, USB_WU and input end USB_TXE, the USB_RXF of this module in proper order.
In the USB module, USB_D 0..USB_D 7Meet the bi-directional data end 25..18 of USB chip U4A, what USB_RD met U4A reads control end pin 16, what USB_WR met U4A writes control end pin 15, USB_WU connects waking up of USB chip U4A and holds pin 11, USB_TXE connects the transmission control end of U4A, USB_RXF connects the reception control end of USB chip U4A, and the crystal oscillator input end pin 27 of U4A also meets crystal oscillator Y 1An end, capacitor C 46An end, the defeated output terminal 28 of the crystal oscillator of USB chip U4A also meets crystal oscillator Y 1The other end, capacitor C 47An end, capacitor C 46, C 47Another termination digitally, the data anode USBDP of USB chip U4A and connecting resistance R 20, resistance R 24An end, the data negative terminal USBDM connecting resistance R of USB chip U4A 21, R 20The other end and connect the B end pin 4 of bi-directional data anode pin 3, the transient suppressor U4B of USB interface U4C, resistance R 21The other end and connect the bi-directional data negative terminal pin 2 of U4C and the A of U4B end pin 6.
Beneficial effect: this luminosity response characteristics measuring instrument of notebook computer liquid crystal display screen is international initiative, and this measuring instrument has following characteristics:
1. measured notebook computer and LCDs be image forming source be again data collection station, so need not special-purpose control terminal when operation resolution chart and data acquisition.
2. the analog to digital conversion of data acquisition has adopted the change-over circuit of single-ended signal input, differential signal output, thereby need not the multiple averaging image data and also can eliminate the noise signal that produces in the photoelectric conversion process.
3. utilization numerical control opto-electronic conversion and collection are from triggering mode, and measurement mechanism has been realized integrated Automatic Control, and measuring operation is more flexible, easier, more portable.
Description of drawings
Fig. 1 is a general structure block diagram of the present invention, comprises notebook computer 1 (containing resolution chart module, data computation module), programmable optical electric amplifier module 2, A/D modular converter 3, FPGA module 4, USB module 5.
Fig. 2, Fig. 3, Fig. 4, Fig. 5 are electrical schematic diagrams of the present invention, and their with dashed lines are divided into programmable optical electric amplifier module 2, A/D modular converter 3, FPGA module 4, USB module 5.
Embodiment
Luminosity response characteristics measuring instrument of notebook computer liquid crystal display screen of the present invention is by notebook computer, able to programme
Photo amplifier module, A/D modular converter, FPGA module, USB module are in series ringwise and connect to form, and contain resolution chart module and data computation module in the notebook computer.Resolution chart module in the notebook computer is to liquid crystal display transmitted image data, transmit measuring command through USB interface to the USB module, programmable optical electric amplifier module is gathered the notebook computer liquid crystal display screen luminance signal and is changed voltage signal into, through A/D modular converter switch analog voltages signal is digital voltage signal, the FPGA module collection poke word voltage signal that eases up, the full scale of control programmable optical electric amplifier module is proofreaied and correct, trigger the timing conversion of A/D modular converter, the USB module transmits digital voltage signal to notebook computer through USB interface, and the data computation module in the notebook computer is calculated liquid crystal response rising/fall time and fuzzy edge rising/fall time.
Notebook computer contains resolution chart module, data computation module.The image display module of resolution chart module application DirectXSDK SDK (Software Development Kit) design is based on the programming mode of MFC (microsoft foundation class storehouse) document-view: (1) control interface input resolution format of display, display graphics size, red/green/indigo plant and gray scale selection, display refresh rates selection, Gray Level Jump grade, Gray Level Jump time etc., the control interface enters consistency operation when (2) measuring beginning, show the resolution chart of transient state saltus step on the screen, (3) notebook computer passes measuring command to the FPGA module under USB interface; Data computation module is carried out after the timing acquiring of finishing the luminosity response characteristics data: (1) transient state saltus step resolution chart program is out of service, (2) the control interface enters foregrounding and waits for upload command, (3) according to upload command, notebook computer is through the luminosity response characteristics data of USB interface reception from the USB module, (4) calculate LCRT-rising time/LCRT-falling time (liquid crystal response rise time/fall time) and BET-rising time/BET-falling time (fuzzy edge rise time/fall time), and in control interface output result of calculation.
Programmable optical electric amplifier module is mainly by photodiode D 1(S9219), current/voltage converter U1A (OP27), in-phase amplifier U1B (OP27), 1/2 phase inverter U1C (OP27), digital regulation resistance U1D (X9511) form.D 1Negative pole connect the inverting input 2 that simulation ground, positive pole meet U1A, resistance R 1, capacitor C 1An end and meet negative input end 2, the R of U1A 1, C 1The other end and connect the output terminal 6 of U1A, the in-phase input end of U1A connects simulation ground, resistance R 2The output terminal 6 of a termination U1A, the other end and connecting resistance R 3, capacitor C 6An end, the in-phase input end of U1B meets R 3The other end, capacitor C 7An end, C 6, C 7The other end and connect simulation ground, the end of the inverting input of U1B and connecting resistance R5, the sliding end 5 of U1D and high-end 3, resistance R 4The low side 6 of a termination U1D, R 4Another termination simulation ground, the increment control end 1 that the depreciation control end 2 of U1D meets Pin85, U1D meets Pin96, Enable Pin 7 ground connection of U1D, the output terminal 6 of U1B and the other end, the resistance R of connecting resistance R5 6An end, the inverting input 2 of U1C also meets R 6The other end, resistance R 7An end, C 12An end, the in-phase input end 3 connecting resistance R of U1C 8, R 8Another termination simulation ground, the output terminal 6 of U1C also meets R 7, C 12The other end and the output terminals A mp-out of this module.
The A/D modular converter mainly is made up of differential driver U2A (AD8138), 12Bits A/D converter U2B (AD9220), follower U2C (OP07).Amp-out end and connecting resistance R 9, resistance R 11An end, the in-phase input end 8 of U2A also meets R 11The other end, resistance R 13An end, the reversed-phase output 5 of U2A also meets R 13The other end, resistance R 17An end, the inverting input 1 of U2A and connecting resistance R 12, resistance R 14An end, R 12Other end connecting resistance R 10An end, R 10Another termination simulation ground, the in-phase output end 4 of U2A also meets R 14The other end, resistance R 16An end, the analog input anode 23 of U2B also meets R 16The other end, capacitor C 28An end, the analog input negative terminal 24 of U2B meets R 17The other end, C 28The other end, the common mode electrical level end 22 of U2B also connects capacitor C 27An end, the in-phase input end 3 of U2C, C 27Another termination simulation ground, the inverting input 2 of U2C also connects output terminal 6, the resistance R of U2C 15An end, R 15The other end and connect capacitor C 18An end, the common mode electrical level end 2 of U2A, C 18Another termination simulation ground, resistance R 0Termination simulation ground, R 0Another termination digitally, the digital output end of U2B [13..10] runs in and hinders 1～4 end of RP1, output terminals A DC_IO1～the ADC_IO4 of 8～5 these modules of termination of RP1, the digital output end of U2B [9..6] runs in and hinders 1～4 end of RP2, output terminals A DC_IO5～the ADC_IO8 of 8～5 these modules of termination of RP2, the digital output end of U2B [5..2] runs in and hinders 1～4 end of RP3, the output terminals A DC_IO9～ADC_IO12 of 8～5 these modules of termination of RP3, the clock end 1 connecting resistance R of U2B 18An end, R 18The input end of clock ADC_CLK of another this module of termination, the data of U2B are overflowed end 14 connecting resistance R 19An end, R 19Another this module of termination overflow output terminal OTR.
The FPGA module mainly is made up of fpga chip U3A (EP1C6144T), FPGA configuring chip U3B (EPCS4I8), crystal oscillator U3C (20MHZ), buffer U3D (IDT71V416).ADC_IO1～ADC_IO12 connects I/O mouth [129..134, the 139..144] pin of U3A, and ADC_CLK connects I/O mouth 119 pin of U3A, and OTR connects I/O mouth 128 pin of U3A, and the sheet of U3B choosing end 1 and the sheet that meets U3A select output pin 12, resistance R 20An end, the clock end 6 of U3B connects the clock pin 24 of U3A, the data input pin 5 of U3B connects the data output pin 25 of U3A, the data output end 2 of U3B connects the data input pin 13 of U3A, and the output terminal 3 that U3C connects connects the clock input pin 17 of U3A, the address input end [1..5 of U3D, 18..27,42..44] connect I/O mouth [1..7,10..11, the 26..36] pin of U3A, bi-directional data end [the 7..16 of U3D, 29..32,35..38] and meet I/O mouth [37..42, the 47..53 of U3A, 56..58] pin, the output enable end 41 of U3D connects I/O mouth 59 pin of U3A, and U3D writes I/O mouth 60 pin that Enable Pin 17 meets U3A, and the sheet choosing end 6 of U3D connects I/O mouth 61 pin of U3A, Pin96 connects I/O mouth 96 pin of U3A, Pin85 connects I/O mouth 85 pin of U3A, and the I/O mouth of U3A [62,67..73] pin meets the bi-directional data end [USB_D of this module 0..USB_D 7], I/O mouth [74..78] pin of U3A meets output terminal USB_RD, USB_WR, USB_WU and input end USB_TXE, the USB_RXF of this module in proper order.
The USB module is mainly by USB chip U4A (FT245BM), transient suppressor U4B (SN65220DBV), USB interface U4C (USB_Port), crystal oscillator Y 1(6MHZ) form.[USB_D 0..USB_D 7] connect the bi-directional data end [25..18] of U4A, what USB_RD met U4A reads control end 16, and what USB_WR met U4A writes control end 15, USB_WU connects waking up of U4A and holds 11, USB_TXE connects the transmission control end of U4A, and USB_RXF connects the reception control end of U4A, and the crystal oscillator input end 27 of U4A also meets Y 1An end, capacitor C 46An end,
The crystal oscillator output terminal 28 of U4A also meets Y 1The other end, capacitor C 47An end, C 46, C 47Another termination digitally, the data anode USBDP of U4A and connecting resistance R 20, resistance R 24An end, the data negative terminal USBDM connecting resistance R of U4A 21, R 20The other end and connect the B end 4 of bi-directional data anode 3, the transient suppressor U4B of USB interface U4C, R 21The other end and connect the bi-directional data negative terminal 2 of U4C and the A of transient suppressor U4B end 6.

Claims (2)

1. luminosity response characteristics measuring instrument of notebook computer liquid crystal display screen, it is characterized in that this measuring instrument is in series ringwise and is connected to form by notebook computer (1), programmable optical electric amplifier module (2), A/D modular converter (3), on-site programmable gate array FPGA module (4), USB module (5), notebook computer contains resolution chart module and data computation module in (1); Resolution chart module in the notebook computer (1) is to liquid crystal display transmitted image data, transmit measuring command through USB interface to USB module (5), programmable optical electric amplifier module (2) is gathered the notebook computer liquid crystal display screen luminance signal and is changed voltage signal into, through A/D modular converter (3) switch analog voltages signal is digital voltage signal, FPGA module (4) is gathered gentle poke word voltage signal, the full scale of control programmable optical electric amplifier module (2) is proofreaied and correct, trigger the timing conversion of A/D modular converter (3), USB module (5) transmits digital voltage signal to notebook computer (1) through USB interface, and the data computation module in the notebook computer (1) is calculated liquid crystal response rising/fall time and fuzzy edge rising/fall time.
2. the measuring instrument of notebook computer liquid crystal display screen luminosity response characteristics according to claim 1, it is characterized in that in notebook computer (1), the image display module of resolution chart module application DirectX SDK SDK (Software Development Kit) design is based on the programming mode of microsoft foundation class storehouse MFC document-view: 1) control interface input resolution format of display, the display graphics size, red/green/indigo plant and gray scale are selected, display refresh rates is selected, the Gray Level Jump grade, the Gray Level Jump time, the control interface enters consistency operation when 2) measuring beginning, the resolution chart that shows the transient state saltus step on the screen, 3) notebook computer passes measuring command to the FPGA module under USB interface; Data computation module is carried out after the timing acquiring of finishing the luminosity response characteristics data: 1) transient state saltus step resolution chart program is out of service, 2) the control interface enters foregrounding and waits for upload command, 3) according to upload command, notebook computer is through the luminosity response characteristics data of USB interface reception from the USB module, 4) calculate liquid crystal response rise time/fall time LCRT-rising time/LCRT-falling time and fuzzy edge rise time/fall time BET-rising time/BET-falling time, and in control interface output result of calculation.
CN2010101199796A 2010-03-08 2010-03-08 Luminosity response characteristics measuring instrument of notebook computer liquid crystal display screen Expired - Fee Related CN101806656B (en)

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CN102141695B (en) * 2011-01-11 2012-11-07 亚世光电股份有限公司 Detection system for intelligent liquid crystal display module
CN102353527B (en) * 2011-08-26 2013-09-04 东南大学 Method for measuring brightness response characteristic of display screen of notebook computer
CN102682684B (en) * 2012-05-29 2014-10-29 东南大学 Method for measuring quality of dynamic image of liquid crystal display
CN103197444B (en) * 2013-03-22 2015-09-30 深圳市华星光电技术有限公司 The measuring method of a kind of liquid crystal display response time and system
CN103257468B (en) * 2013-05-16 2016-04-13 中山大学 A kind of liquid crystal display response time measuring method based on reference brightness
CN103593198A (en) * 2013-11-27 2014-02-19 浪潮电子信息产业股份有限公司 Implementation method based on PSOC as EC controller on Feiteng processor notebook computer

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