Mitsubishi Electric KD Series User Manual page 85

Appendix. B LED lighting control
LED lighting control of MX series
As described in 5-2 Setting ⑧ , the initial setting of the LED-duty time is 15μs.
However, in order to reduce noise, which is also required for the CE mark compliance, the clock module has the SSCG function.
Therefore, depending on the LED-duty time, the product output may cyclically fluctuate in intensity, and the output image may have
horizontal stripes. To avoid the situation, use the product with the following restriction condition.
*SSCG: Spread Spectrum Clock Generator
1) Use with Line period 34.5μs or under ( 30kHz or over )
Do not change the initial setting of lighting control (Division number, Lighting time)
*Output will be slightly dark with the Line period 27 to 23μs (37 to 43kHz)
2) Line period 34.5μs or over (30kHz or under), and no change on brightness
Do not change the initial setting of lighting control (Division number, Lighting time)
3) Line period 34.5μs or over (30kHz or under), and change brightness (extend
lighting time)
Set multiple number of 31.25μs for LEDW0, LEDT0.
LEDS0
CIS_SI
LEDnCONT
LEDnW0_gain=LEDnW0×（128+LEDGAIN0）/256
Timing diagram of LED lighting control
TM-XG537C
LEDT0
LEDnW0_gain/LEDN0
LEDT0/LEDN0
COPYRIGHT © 2020 MITSUBISHI ELECTRIC CORPORATION. ALL RIGHTS RESERVED.
Initial setting of the LED lighting ：
LEDW0: 15μs
LEDT0: 31.25μs
LEDN0: 2 (dual divided)
LEDS0: 3.25μs (fixed value)
*LEDS0 setting must be 3.25μs
*For details of the LED lighting
control, refer to the "Function
specification" document.
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