T420HW09 V2 Product Specification Rev.0 0
Model Name: T420HW09 V2
Issue Date : 2011/8/6 (＊)Preliminary Specifications ＊ ( )Final Specifications
Customer Signature
Approved By
Date
AUO
Approval By PM Director Yen Ting Chiu
Date
_________________________________ Note
____________________________________ Reviewed By RD Director Eugene CC Chen ____________________________________ Reviewed By Project Leader Angus Liu ____________________________________ Prepared By PM Adam Yang ____________________________________
? Copyright AUO Optronics Corp. 2010 All Rights Reserved.
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T420HW09 V2 Product Specification Rev.0 0
Contents
No CONTENTS RECORD OF REVISIONS 1 2 3 3-1 3-2 3-3 3-4 3-5 3-6 3-7 4 5 6 7 7-1 7-2 8 8-1 8-2 8-3 9 9-1 /9-2 9-3 9-4 9-5 9-6 GENERAL DESCRIPTION ABSOLUTE MAXIMUM RATINGS ELECTRICAL SPECIFICATION ELECTRIACL CHARACTERISTICS INTERFACE CONNECTIONS SIGNAL TIMING SPECIFICATION SIGNAL TIMING WAVEFORM COLOR INPUT DATA REFERENCE POWER SEQUENCE BACKLIGHT SPECIFICATION OPTICAL SPECIFICATION MECHANICAL CHARACTERISTICS RELIABILITY TEST ITEMS INTERNATIONAL STANDARD SAFETY EMC PACKING DEFINITION OF LABEL PACKING METHODS PALLET AND SHIPMENT INFORMATION PRECAUTION MOUNTING PRECAUTIONS OPERATING PRECAUTIONS ELECTROSTATIC DISCHARGE CONTROL PRECAUTIONS FOR STRONG LIGHT EXPOSURE STORAGE HANDLING PRECAUTIONS FOR PROTECT FILM
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T420HW09 V2 Product Specification Rev.0 0
Record of Revision
Version 0.0 Date 2011/08/06 Page First release Description
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T420HW09 V2 Product Specification Rev.0 0
1. General Description
This specification applies to the 42.0 inch Color TFT-LCD Module T420HW09 V2. This LCD module has a TFT active matrix type liquid crystal panel 1,920x1,080 pixels, and diagonal size of 42.0 inch. This module supports 1,920x1,080 mode. Each pixel is divided into Red, Green and Blue sub-pixels or dots which are arranged in vertical stripes. Gray scale or the brightness of the sub-pixel color is determined with a 8-bit gray scale signal for each dot. The T420HW09 V2 has been designed to apply the 8-bit 2 channel LVDS interface method. It is intended to support displays where high brightness, wide viewing angle, high color saturation, and high color depth are very important.
* General Information
Items Active Screen Size Display Area Outline Dimension Driver Element Bezel Opening Display Colors Number of Pixels Pixel Pitch Pixel Arrangement Display Operation Mode Surface Treatment Rotate Function
Specification 42.02 930.24(H) x 523.26(V) 983.0(H) x 576.0(V) x 52.65(D) a-Si TFT active matrix 939 (H) x 531 (V) 8 bit, 16.7M 1,920x1,080 0.4845 (H) x 0.4845 (W) RGB vertical stripe Normally Black Anti-Glare, 3H Unachievable
Unit inch mm mm
Note
D: front bezel to inverter cover
mm Colors Pixel mm
Haze=2% Note 1
Note 1: Rotate Function refers to LCD display could be able to rotate.
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T420HW09 V2 Product Specification Rev.0 0
2. Absolute Maximum Ratings
The followings are maximum values which, if exceeded, may cause faulty operation or damage to the unit
Item Logic/LCD Drive Voltage Input Voltage of Signal Operating Temperature Operating Humidity Storage Temperature Storage Humidity Panel Surface Temperature Note 1: Duration:50 msec.
Symbol Vcc Vin TOP HOP TST HST PST
Min -0.3 -0.3 0 10 -20 10
Max 14 4 +50 90 +60 90 65
Unit [Volt] [Volt] [ C] [%RH] [ C] [%RH] [ C]
o o o
Conditions Note 1 Note 1 Note 2 Note 2 Note 2 Note 2 Note 3
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℃
Note 3: Surface temperature is measured at 50
Dry condition
℃
℃
greater than 40
, the wet bulb temperature must not exceed 39
.
℃
The relative humidity must not exceed 90% non-condensing at temperatures of 40
℃
Note 2 : Maximum Wet-Bulb should be 39
and No condensation. or less. At temperatures
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T420HW09 V2 Product Specification Rev.0 0
3. Electrical Specification
The T420HW09 V1 requires two power inputs. One is employed to power the LCD electronics and to drive the TFT array and liquid crystal. The other is to power Back Light Unit.
3.1 Electrical Characteristics 3.1.1: DC Characteristics
Value Min. Typ. Max
Parameter LCD Power Supply Input Voltage Power Supply Input Current Power Consumption Inrush Current Input Differential Voltage LVDS Interface Differential Input High Threshold Voltage Differential Input Low Threshold Voltage Input Common Mode Voltage CMOS Interface Input High Threshold Voltage Input Low Threshold Voltage
Symbol
Unit
Note
VDD IDD PC IRUSH
10.8 ---200 +100 -300 1.1 2.7 0 110 50000
12 1 12 -400 --1.25 --115
13.2 1.5 18 3 600 +300 -100 1.4 3.3 0.6 120
VDC A Watt A mVDC mVDC mVDC VDC VDC VDC Watt Hour 9,10 1 1 2 3 3 3 3 4 4
Backlight Power Consumption Life time
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∣ ∣
VTH VTL VICM VIH (High) VIL (Low) PBL
VID
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T420HW09 V2 Product Specification Rev.0 0
3.1.2: AC Characteristics
Value Min. -500 Fclk -3% 30 Typ. ---Max +500 Fclk +3% 200
Parameter
Symbol
Unit
Note
Input Channel Pair Skew Margin Receiver Clock : Spread Spectrum Modulation range Receiver Clock : Spread Spectrum Modulation frequency Receiver Data Input Margin Fclk = 85 MHz Fclk = 65 MHz Note :
tSKEW (CP) Fclk_ss Fss
ps MHz KHz
5 6 6
LVDS Interface
tRMG
-0.4 -0.5
---
0.4 0.5
ns
7
2.
Measurement condition : Rising time = 400us
GND
10% 400 μs
3. VICM = 1.25V
LVDS V IC M LVDS + V TH |V ID | V TL
GND
|V ID |
0V
4. The measure points of VIH and VIL are in LCM side after connecting the System Board and LCM.
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℃
1.
VDD = 12.0V, Fv = 60Hz, Fclk= 74.25MHz , 25
, Test Pattern : White Pattern
90%
VDD
|V ID |
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T420HW09 V2 Product Specification Rev.0 0
5. Input Channel Pair Skew Margin
Note: x = 0, 1, 2, 3, 4 6. LVDS Receiver Clock SSCG (Spread spectrum clock generator) is defined as below figures
1/FSS Fclk_ss(max) Fclk_ss(max)
Fclk
Fclk_ss(min) Fclk_ss(min)
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T420HW09 V2 Product Specification Rev.0 0
7. Receiver Data Input Margin Parameter Input Clock Frequency Input Data Position0 Input Data Position1 Input Data Position2 Input Data Position3 Input Data Position4 Input Data Position5 Input Data Position6 Symbol Fclk tRIP1 tRIP0 tRIP6 tRIP5 tRIP4 tRIP3 tRIP2 Rating Min Fclk (min) -|tRMG| T/7-|tRMG| 2T/7-|tRMG| 3T/7-|tRMG| 4T/7-|tRMG| 5T/7-|tRMG| 6T/7-|tRMG| Type -0 T/7 2T/7 3T/7 4T/7 5T/7 6T/7 Max Fclk (max) |tRMG| T/7+|tRMG| 2T/7+|tRMG| 3T/7+|tRMG| 4T/7+|tRMG| 5T/7+|tRMG| 6T/7+|tRMG| Unit MHz ns ns ns ns ns ns ns Note T=1/Fclk
tRIP2 tRIP3 tRIP4 tRIP5 tRIP6 tRIP0 tRIP1 LVDS-Rx Input Data LVDS-Rx Input Clock Rx3 Rx2 Rx1 Rx0 Rx6 Rx5 Rx4 Rx3 Rx2 Rx1 Rx0 Rx6
Vdiff = 0V 1/Fclk=T
8. Do not attach a conducting tape to lamp connecting wire. If the lamp wire attach to conducting tape, TFT-LCD Module have a low luminance and the inverter has abnormal action because leakage current occurs between lamp wire and conducting tape.
temperatures, the brightness of CCFL will drop and the life time of CCFL will be reduced. 10. Specified values are for a single lamp only which is aligned horizontally. The lifetime is defined as the time which luminance of the lamp is 50% compared to its original value. [Operating condition: Continuous operating at Ta = 25±2 ]
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℃
℃
℃
temperatures greater than 40
, the wet bulb temperature must not exceed 39
. When operate at low
Page 9 / 31
℃
9. The relative humidity must not exceed 80% non-condensing at temperatures of 40
or less. At
T420HW09 V2 Product Specification Rev.0 0
3.2 Interface Connections
LCD connector: 187059-51221 (P-TWO, LVDS connector) Mating connector: PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Symbol N.C. N.C. N.C. N.C. N.C. N.C. LVDS_SEL
NC NC NC
Description AUO Internal Use Only AUO Internal Use Only AUO Internal Use Only AUO Internal Use Only AUO Internal Use Only AUO Internal Use Only Open/High(3.3V) for NS, Low(GND) for JEIDA
No connection No connection No connection
PIN 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
Symbol N.C. N.C. CH2_0CH2_0+ CH2_1CH2_1+ CH2_2CH2_2+ GND CH2_CLKCH2_CLK+ GND CH2_3CH2_3+ CH2_4CH2_4+ N.C. N.C. GND GND GND NC VDD VDD VDD VDD
Description AUO Internal Use Only AUO Internal Use Only LVDS Channel 2, Signal 0LVDS Channel 2, Signal 0+ LVDS Channel 2, Signal 1LVDS Channel 2, Signal 1+ LVDS Channel 2, Signal 2LVDS Channel 2, Signal 2+ Ground LVDS Channel 2, Clock LVDS Channel 2, Clock + Ground LVDS Channel 2, Signal 3LVDS Channel 2, Signal 3+ LVDS Channel 2, Signal 4LVDS Channel 2, Signal 4+ AUO Internal Use Only AUO Internal Use Only Ground Ground Ground No connection Power Supply, +12V DC Regulated Power Supply, +12V DC Regulated Power Supply, +12V DC Regulated Power Supply, +12V DC Regulated
GND CH1_0CH1_0+ CH1_1CH1_1+ CH1_2CH1_2+ GND CH1_CLKCH1_CLK+ GND CH1_3CH1_3+ CH1_4CH1_4+
Ground LVDS Channel 1, Signal 0LVDS Channel 1, Signal 0+ LVDS Channel 1, Signal 1LVDS Channel 1, Signal 1+ LVDS Channel 1, Signal 2LVDS Channel 1, Signal 2+ Ground LVDS Channel 1, Clock LVDS Channel 1, Clock + Ground LVDS Channel 1, Signal 3LVDS Channel 1, Signal 3+ LVDS Channel 1, Signal 4LVDS Channel 1, Signal 4+
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T420HW09 V2 Product Specification Rev.0 0
LVDS Option = High/Open
NS
P re vio u s C y cle C lo ck
C u rren t C yc le
N e xt C yc le
C H x_0+ C H x_0-
R1
R0
G0
R5
R4
R3
R2
R1
R0
G0
C H x_1+ C H x_1-
G2
G1
B1
B0
G5
G4
G3
G2
G1
B1
C H x_2+ C H x_2-
B3
B2
DE
NA
NA
B5
B4
B3
B2
DE
C H x_3+ C H x_3-
R7
R6
NA
B7
B6
G7
G6
R7
R6
NA
Note: x = 1, 2, 3, 4…
LVDS Option = Low
JEIDA
C u rren t C ycle N e x t C ycle
P re vio u s C yc le C lo ck
CH x_0+ CH x_0-
R3
R2
G2
R7
R6
R5
R4
R3
R2
G2
CH x_1+ CH x_1-
G4
G3
B3
B2
G7
G7
G6
G5
G4
G3
B3
CH x_2+ CH x_2-
B5
B4
DE
NA
NA
B7
B6
B5
B4
DE
CH x_3+ CH x_3-
R1
R0
NA
B1
B0
G1
G0
R1
R0
NA
Note: x = 1, 2, 3, 4…
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Page 11 / 31
T420HW09 V2 Product Specification Rev.0 0
3.3 Signal Timing Specification
This is the signal timing required at the input of the user connector. All of the interface signal timing should be satisfied with the following specifications for its proper operation.
Timing Table (DE only Mode)
Signal Item Period Vertical Section Active Blanking Period Horizontal Section Active Blanking Clock Vertical Frequency Horizontal Frequency Frequency Frequency Frequency Symbol Tv Tdisp (v) Tblk (v) Th Tdisp (h) Tblk (h) Fclk=1/Tclk Fv Fh 70 50 47 60 10 1030 Min. 1090 Typ. 1125 1080 45 1100 960 140 74.25 60 67.5 365 82 63 73 400 1325 Max 1480 Unit Th Th Th Tclk Tclk Tclk MHz Hz KHz
Notes: (1) Display position is specific by the rise of DE signal only. Horizontal display position is specified by the rising edge of 1 DCLK after the rise of 1 DE, is displayed on the left edge of the screen. (2)Vertical display position is specified by the rise of DE after a “Low” level period equivalent to eight times of horizontal period. The 1 data corresponding to one horizontal line after the rise of 1 DE is displayed at the top line of screen. (3)If a period of DE “High” is less than 1920 DCLK or less than 1080 lines, the rest of the screen displays black. (4)The display position does not fit to the screen if a period of DE “High” and the effective data period do not synchronize with each other.
st st st st
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T420HW09 V2 Product Specification Rev.0 0
Tv Tblk(v) Th DE Tdisp(v) N L in e
M pixel
CLK Tclk Th Tdisp(h) DE Tblk(h)
3.4 Signal Timing Waveforms
CH1
Pixel M-7
Pixel M-5
Pixel M-3
Pixel M-1
Invalid Data
Pixel 1
Pixel 3
Pixel 5
Pixel 7
Pixel 9
Pixel 11
Pixel M-5
Pixel M-3
Pixel M-1
Invalid Data
Pixel 1
Pixel 3
CH2
Pixel M-6
Pixel M-4
Pixel M-2
Pixel M
Invalid Data
Pixel 2
Pixel 4
Pixel 6
Pixel 8
Pixel 10
Pixel 12
Pixel M-4
Pixel M-2
Pixel M
Invalid Data
Pixel 2
Pixel 4
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RGB Data
Invalid Data
Line N
Line 1
Line 2
Line 3
Line 4
Line N
Invalid Data
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T420HW09 V2 Product Specification Rev.0 0
3.5 Color Input Data Reference
The brightness of each primary color (red, green and blue) is based on the 8 bit gray scale data input for the color; the higher the binary input, the brighter the color. The table below provides a reference for color versus data input.
COLOR DATA REFERENCE
Input Color Data Color RED MSB LSB MSB GREEN LSB MSB BLUE LSB
R7 R6 R5 R4 R3 R2 R1 R0 G7 G6 G5 G4 G3 G2 G1 G0 B7 B6 B5 B4 B3 B2 B1 B0 Black Red(255) Green(255) Basic Color Blue(255) Cyan Magenta Yellow White RED(000) RED(001) R ---RED(254) RED(255) GREEN(000) GREEN(001) G ---GREEN(254) GREEN(255) BLUE(000) BLUE(001) B ---BLUE(254) BLUE(255) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 1 1 0 0 0 1 0 0 0 1 1 1 0 0 0 1 0 0 0 1 1 1 0 0 0 1 0 0 0 1 1 1 0 0 0 1 0 0 0 1 1 1 0 0 0 1 0 0 0 1 1 1 0 0 0 1 0 0 0 1 1 1 0 0 0 1 0 0 0 1 1 1 0 1 0 0 1 0 1 0 1 1 0 0 0 0 1 0 1 0 1 1 0 0 0 0 1 0 1 0 1 1 0 0 0 0 1 0 1 0 1 1 0 0 0 0 1 0 1 0 1 1 0 0 0 0 1 0 1 0 1 1 0 0 0 0 1 0 1 0 1 1 0 0 0 0 1 0 1 0 1 1 0 0 0 0 0 1 1 1 0 1 0 0 0 0 0 1 1 1 0 1 0 0 0 0 0 1 1 1 0 1 0 0 0 0 0 1 1 1 0 1 0 0 0 0 0 1 1 1 0 1 0 0 0 0 0 1 1 1 0 1 0 0 0 0 0 1 1 1 0 1 0 0 0 0 0 1 1 1 0 1 0 0
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Page 14 / 31
T420HW09 V2 Product Specification Rev.0 0
Power Sequence for LCD
90% 90% 10% 10%
Pow er Supply For LCD VD D (+ 12 V )
G ND
10%
t1
t2
t5
t6
t7
Interface Signal ( LV DS Data & CLK )
G ND
Valid D ata
t3
t4
Backlight on / off control signal ( VBLO N )
GND
CM O S Interface Signal ( LVD S _ SE L , ....... )
G ND
t8
t9
Parameter t1 t2 t3 t4 t5 t6 t7 t8 t9
Values Min. 0.4 0.1 450 0
*1
Type. -------------------
Max. 30 50 --------*2
Unit ms ms ms ms ms ms ms ms ms
0 --500 10 0
*3
--50 ---
Note: (1) t4=0 : concern for residual pattern before BLU turn off. (2) t6 : voltage of VDD must decay smoothly after power-off. (customer system decide this value) (3) When CMOS Interface is N.C. (no connection), opened in Transmitted end, T8 timing spec can be negligible
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Page 15 / 31
T420HW09 V2 Product Specification Rev.0 0
3.7 Backlight Specification
The backlight unit contains 10-I type CCFLs (Cold Cathode Fluorescent Lamp)
3.7.1 Electrical specification
Spec Item Input Voltage Input Current Input Power Inrush Current Operating Frequency Symbol VDDB IDDB PDDB IRUSH FBL ON On/Off control voltage VBLON OFF On/Off control current Internal PWM Dimming Control Voltage Internal PWM Dimming Control Current Internal PWM Dimming Ratio External PWM Control Voltage External PWM Control Current External PWM Duty ratio External PWM Frequency IBLON MAX V_IPWM MIN I_IPWM VDDB=24V VDDB=24V 0 2 VDC mADC VDDB=24V VDDB=24V 0 3.0 0.8 1.5 3.3 mA VDC Condition Min VDDB=24V VDDB=24V VDDB=24V VDDB=24V 21.6 3.375 81 42 2 Typ 24 3.75 90 44 Max 26.4 4.125 99 6 46 5.5 VDC VDC ADC W ADC KHz 1 1 2 Unit Note
R_IPWM
VDDB=24V
10 2 0 10 140
180
100 3.3
% VDC mADC % Hz 3 -
MAX VDDB=24V V_EPWM MIN I_EPWM D_EPWM F_EPWM VDDB=24V VDDB=24V VDDB=24V VDDB=24V
0.8 2 100 240
Note 1 : Dimming ratio= 100% (MAX) Ta=25±5 , Turn on for 45minutes Note 2 : Measurement condition Rising time = 20ms (VDDB : 10%~90%); Note 3 : For External PWM application, 5% dimming is function well and no backlight shutdown.
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）
℃
≧
（
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T420HW09 V2 Product Specification Rev.0 0
3.7.2 Input Pin Assignment
CN3: CI0114M1HRL-NH (Cvilux) Pin 1 2 3 4 5 6 7 8 9 10 11 Symbol VDDB VDDB VDDB VDDB VDDB BLGND BLGND BLGND BLGND BLGND DET Description Operating Voltage Supply, +24V DC regulated Operating Voltage Supply, +24V DC regulated Operating Voltage Supply, +24V DC regulated Operating Voltage Supply, +24V DC regulated Operating Voltage Supply, +24V DC regulated Ground and Current Return Ground and Current Return Ground and Current Return Ground and Current Return Ground and Current Return BLU status detection: Normal : 0~0.8V ; Abnormal : Open collector BLU On-Off control: 12 VBLON BL On : High/Open (2V~5.5V); BL off : Low (0~0.8V/GND) 13 14 VDIM PDIM Internal PWM (0~3.3V for 10~100% Duty, open for 100%) < NC ; at External PWM mode> External PWM (10%~100% Duty, open for 100%) < NC ; at Internal PWM mode>
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Page 17 / 31
T420HW09 V2 Product Specification Rev.0 0
3.7.3 Power Sequence for Inverter
90%
24V(typ.)
90%
Power Input for BLU (VDDB)
10%
T1
T2
T5
Dimming Control Signal (V_IPWM,V_EPWM) T3
T4
BLU On/Off Enable (VBLON)
Dip condition for Inverter
Power Input for BLU (VDDB)
T6
VDDB(typ.)*0.8
Parameter Min T1 T2 T3 T4 T5 T6 20 500 250 0 1 -
Value Typ Max 10
Units ms ms ms ms ms ms
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Page 18 / 31
T420HW09 V2 Product Specification Rev.0 0
4. Optical Specification
Optical characteristics are determined after the unit has been ‘ON’ and stable for approximately 45 minutes in a dark environment at 25° The values specified are at an approximate distance 50cm from the LCD surface at a C. viewing angle of φ and θ equal to 0° .
Fig.1 presents additional information concerning the measurement equipment and method.
SR3 or equivalent
Parameter Contrast Ratio Surface Luminance (White) Luminance Variation Response Time (G to G) Color Gamut Color Coordinates Red
Symbol Min. CR LWH δWHITE(9P) Tγ NTSC 3200 320 ---
Values Typ. 4000 400 -6.5 72 Max --1.33 --
Unit
Notes 1
cd/m
2
2 3
Ms %
4
RX RY
0.640 0.330 0.281 Typ.-0.03 0.590 0.144 0.060 0.280 0.290 5 Typ.+0.03
Green
GX GY
Blue
BX BY
White
WX WY
Viewing Angle x axis, right(φ=0° ) x axis, left(φ=180° ) y axis, up(φ=90° ) y axis, down (φ=270° ) θr θl θu θd ----89 89 89 89 ----degree degree degree degree
Note:
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Page 19 / 31
T420HW09 V2 Product Specification Rev.0 0
1. Contrast Ratio (CR) is defined mathematically as: Contrast Ratio= Surface Luminance of Lon5 Surface Luminance of Loff5
2. Surface luminance is luminance value at point 5 across the LCD surface 50cm from the surface with all pixels displaying white. From more information see FIG 2. When lamp current IH = 11mA. the luminance with all pixels displaying white at center 5 location. 3. The variation in surface luminance, δWHITE is defined (center of Screen) as: δWHITE(9P)= Maximum(Lon1, Lon2,…,Lon9)/ Minimum(Lon1, Lon2,…Lon9) LWH=Lon5 where Lon5 is
luminance ratio (0%,25%,50%,75%,100% brightness matrix) and is based on Fv=60Hz to optimize.
Measured Response Time 0% 25% Start 50% 75% 100%
T is determined by 10% to 90% brightness difference of rising or falling period. (As illustrated) The response time is defined as the following figure and shall be measured by switching the input signal for “any level of grey(bright) “ and “any level of gray(dark)”. Any level of gray (Bright)
0%, 25%, 50%, 75%, 100%
100% 90%
10%
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γ γ γ γ
γ γ γ γ
γ
4. Response time T
is the average time required for display transition by switching the input signal for five
Target 0%
25% to 0% 50% to 0% 75% to 0% 100% to 0% 50% to 25% 75% to 25% 100% to 25% 75% to 50% 100% to 50% 100% to 75%
25%
0% to 25%
50%
0% to 50% 25% to 50%
75%
0% to 75% 25% to 75% 50% to 75%
100%
0% to 100% 25% to 100% 50% to 100% 75% to 100%
γ
Any level of gray (Dark)
Any level of gray (Bright)
0%, 25%, 50%, 75%, 100%
Photodetector Output
0%, 25%, 50%, 75%, 100%
Time
T
( F)
T
( R)
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[例1]有人设想用如图所示的装置来选择密度相同、大小不同的球状纳米粒子．粒子在电离室中电离后带正电，电量与其表面积成正比．电离后，粒子缓慢通过小孔O 1进入极板间电压为U 的水平加速电场区域I,再通过小孔O 2射入相互正交的恒定匀强电场、磁场区域II,其中磁场的磁感应强度大小为B ,方向如图．收集室的小孔O 3与O 1、O 2在同一条水平线上．半径为r 0的粒子，其质量为m 0、电量为q 0,刚好能沿O 1O 3直线射入收集室。不计纳米粒子重力． （234,3 4 r S r V ππ＝＝球球） (1)试求图中区域II 的电场强度; (2)试求半径为r 的粒子通过O 2 时的速率; (3) 讨论半径r ≠r 2的粒子刚进入区域II 时向哪个极板偏转． [例2] 如图所示，在x 轴上方有垂直于xy 平面向里的匀强磁场，磁感应强度为B ；在x 轴下方有沿y 轴负方向的匀强电场，场强为E ．一质量为m ，电量为-q 的粒子从坐标原点O 沿着y 轴正方向射出．射出之后，第三次到达x 轴时，它与点O 的距离为L ．求此粒子射出时的速度v 和运动的总路程s （重力不计）．
[例3] 如图所示，M 、N 为两块带等量异种电荷的平行金属板，S 1、S 2为板上正对的小孔，N 板右侧有两个宽度均为d 的匀强磁场区域，磁感应强度大小均为B ，方向分别垂直于纸面向外和向里，磁场区域右侧有一个荧光屏，取屏上与S 1、S 2共线的O 点为原点，向上为正方向建立x 轴．M 板左侧电子枪发射出的热电子经小孔S 1进入两板间，电子的质量为m ，电荷量为e ，初速度可以忽略． （1）当两板间电势差为U 0时，求从小孔S 2射出的电子的速度V 0； （2）求两金属板间电势差U 在什么范围内，电子不能穿过磁场区域而打到荧光屏上． （3）求电子打到荧光屏上的位置坐标x 和金属板间电势差U 的函数关系． [例4]如图所示的空间区域里，y 轴左方有一匀强电场，场强方向跟y 轴负方向成30°角，大小为E ＝4.0×5 10N/C ，y 轴右方有一垂直纸面的匀强磁场，有一质子以速度0v ＝2.0×6 10m/s ，由x 轴上的A 点，第一次沿x 轴正方向射入磁场， 第二次沿x 轴负方向射入磁场，回旋后都垂直于电场方向射入电场，最后又进入 磁场．已知质子质量近似为H m ＝1.6×27 10 kg ．求： （1）匀强磁场的磁感应强度． （2）质子两次在磁场中运动时间的比值． （3）质子两次在电场中运动的时间各是多少?
3.5.7 在图示的装置中，物体A 、B 、C 的质量各为m1、m2、m3，且两两不等，若物体A 、B 与桌面间的摩擦系数均为μ，求三个物体的加速度和绳内的张力。不计绳和滑轮的质量，不计轴承的摩擦，绳不可伸长。 解：隔离物体m 1、m 2、m 3和滑轮，它们的受力情况如图所示。 其中： g m N f N g m W g m N f N g m W 222222111111μμμμ======== T 1和T 3是一对作用力和反作用力： |T 1|=|T 3|=T ' T 2和T 4是一对作用力和反作用力： |T 2|=|T 4|=T " 因为是理想滑轮，所以|T 3|=|T 4| ∴T '= T "=T 0=|T 1|=|T 2| 其中,T0是绳内张力的大小。由于忽略滑轮的质量,所以 T=|T 3|+|T 4|=2T 0 设三个物体的加速度的大小分别为a 1,a 2和a 3,则动力学方程为: ??? ??=-=-=-) 3()2()1(:3 30322201110321a m T g m a m g m T a m g m T m m m μμ 现求a 1,a 2和a 3之间的关系：取如图所示的坐标系，则物体A 的加速度沿x 轴正向，物体B 的加速度沿x 轴的负向，物体C 的加速度沿y 轴正向，因此： 32 2222 2121 2a dt y d a dt x d a dt x d =-== 设绳的长度为L ，则有：-x 1+x 2+2y =L ，两边对时间t 求二阶导数，并利用L 为常数的条件，得 )4() (020221213321222 22212a a a a a a dt y d dt x d dt x d +=?=+--?=++- 求解上面的4个方程，得