Planar LC1200R user manual Timing and Frequency, Video, Horizontal and Vertical Sync

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4.4Timing and Frequency

4.4.1Video, Horizontal and Vertical Sync

Figure 6 illustrate video timing relationships the LC1200R operates within when the specified video mode (Table 5 Video Mode Definitions) is applied.

Front Porch defines the time from end of active video data to the start of Horiz/Vert Sync Pulse.

Back Porch defines the time from end of Horiz/Vert Sync Pulse to the start of active video data.

Blanking is the total time comprising Front Porch, Back Porch and Sync Pulse time(s).

The horizontal sync circuitry synchronizes to horizontal frequencies of 31.468 KHz ±0.5 KHz, 48.077KHz ±0.5KHz, and 56.476KHz ±0.5KHz. Horizontal sync pulse width variation is 1.813- µsec to 3.813-µsec. The LC1200R will "sync" to the specified format vertical frequencies between 60Hz and 72Hz without adjustment.

Absence of Horizontal and/or Vertical Sync will not damage the LC1200R.

4.5Video Signal On-Off Sequences

The sequence for bringing up and removal of each video input signal can be in any sequence or combination of input signals.

Table 6. Video Mode Timing Data

 

 

 

 

 

 

 

 

 

 

 

Video Modes

 

 

 

 

 

IBM VGA

 

VESA

 

 

Resolution

640x400

640x480

800x600

1024x768

 

Video Clock

25.175 MHz

25.175 MHz

50.000 MHz

75.000 MHz

 

Horizontal Scan

 

 

 

 

 

Freq.

31.468 KHz

31.468 KHz

48.077 KHz

56.476 KHz

 

Horizontal Line

31.778 us 800

31.778 us 800

20.800 us 1040

17.707 us 1328

 

Period

pixels

pixels

pixels

pixels

 

Horizontal

6.356 us 160

6.356 us 160

4.800 us 240

4.053 um 304

 

Blanking

pixels

pixels

pixels

pixels

 

Horizontal Sync

 

 

2.400 us 120

1.813 us 136

 

Pulse

3.813 us 96 pixels

3.813 us 96 pixels

pixels

pixels

 

Horizontal Front

 

 

 

 

 

Porch

0.636 us 16 pixels

0.636 us 16 pixels

1.120 us 56 pixels

0.320 us 24 pixels

 

Horizontal Back

 

 

 

1.920 us 144

 

Porch

1.907 us 48 pixels

1.907 us 48 pixels

1.280 us 64 pixels

pixels

 

Horizontal Active

25.422 us 640

25.422 us 640

16.000 us 800

13.653 us 1024

 

Display

pixels

pixels

pixels

pixels

 

Horizontal Sync

 

 

 

 

 

Polarity

-

-

-

-

 

Vertical Scan Freq.

70.087 Hz

59.94 Hz

72.184 Hz

70.069

 

Vertical Frame

14.268 ms 449

16.683ms 525

13.853 ms 666

14.272 ms 806

 

Period

lines

lines

lines

lines

 

Vertical Blanking

1.557 ms 49 line

1.430 ms 45 line

1.373 ms 66 lines

0.673 ms 38 lines

 

Vertical Sync

0.064 ms 2 lines

0.064 ms 2 lines

0.125 ms 6 lines

0.106 ms 6 lines

LC1200R User’s Guide 021-0183-00 Rev A

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Contents LC1200R High-Bright Monitor DC Power Input Requirements Display Cosmetics LCD Display LCD Panel Physical Image CharacteristicsIntroduction Basic ConstructionWeight Display formatMechanical Front View Dimming Control Connector Video Signal ConnectorDC Power Input Connector Photodiode ConnectorPhotodiode Board Power SupplyLCD Controller Board Inverter BoardTemperature and Humidity EnvironmentalButton Board Vibration ShockShock Packaged Product Video Parameters Video Signal RequirementsSignal Functions Video Input LinesSynchronization TTL Allowable Signal Levels Rise and Fall Times Mode DetectionTTL Sync Pulse Signal Levels Color Display DetectionVideo Signal On-Off Sequences Timing and FrequencyVideo, Horizontal and Vertical Sync DC Power Input Requirements DC Power Input LinesDC Input Voltage / Current Power On-Off Sequences User ControlsLCD Controller Board Controls Flip and Mirror User AdjustmentsMax Bright Jumper Photodiode Board and Automatic Dimming Connector Dimming Control Connector Pin Assignment and PerformanceAutomatic Brightness Mode Typical monitor brightness vs. ambient is as follows Manual Brightness ModeMonitor Luminance Maximum Brightness ModeMonitor Performance DIM input, voltsColor Perceived Color Display View AngleDisplay Uniformity Display ChromaticityRegulatory Agency Requirements Display CosmeticsElectromagnetic Energy Susceptibility Requirements RFI Emission CertificationSystem Transient Disturbance Requirements Electrostatic DischargeDesign Workload Description of WarrantyReliability Rohs ComplianceSupport and Service Glossary of Terms LC1200R User’s Guide 021-0183-00 Rev a