Circuit Descriptions, Abbreviation List, and IC Data Sheets
9.
9.8.7
Dynamic Frame Insertion (DFI) Panel
Refer to diagram AB for details.
DFI FPGA (CYCLONE II)
To achieve full-HD with a refresh rate of 100 Hz, an extra frame
is inserted during every frame interval. This is done by adding
an extra FPGA (CYCLONE II, item 7F18).
The CYCLONE II performs the following tasks:
•
Upconversion of the PACIFIC3 outcoming 1080p @ 50 Hz
signal to 1080p @ 100 Hz.
•
Pattern generator.
The CYCLONE II interfaces:
•
Video input: dual LVDS.
•
Video output: quad LVDS.
•
AmbiLight output: CMOS (sequential RGB).
•
I
2
C.
A configuration flash memory is added (item 7CA0 t/m 3).
AmbiLight FPGA
On the DFI panel, also an FPGA (item 7F65) is mounted for
driving the AmbiLight units.
The FPGA performs the following tasks:
•
Driving the AmbiLight units.
The FPGA interfaces:
•
Video input: CMOS (sequential RGB)
•
Video output: none
•
I
2
C output for driving the AmbiLight units
A configuration flash memory is added (item 7F61).
9.9
Ambient Light
In this chassis, LED AmbiLight units are introduced as the
successor of CCFL AmbiLight units. The system that is used is
called “LUMILED”.
The units are completely aligned in factory and are a “Black
Box” for Service. When defective, they must be replaced
entirely. Refer to the Spare Parts List for the correct order
number.
The AmbiLight units are addressed by I
2
C. The I
2
C-address for
all lamp units is “6A”. To address each unit separately,
selection lines are needed to distinguish between the boards.
Control is done by the SSB. Refer to figure “Ambient Light block
diagram” for details.
Figure 9-25 Ambient Light block diagram
To address a specific unit, the selection line has to be “low”.
In case of 2-sided AmbiLight, 6 data bytes are used to address
the units, 3 bytes for each lamp unit. They are driven by Pulse
Width Modulation (PWM). Refer to figure “Lamp unit
addressing” for details.
Figure 9-26 Lamp unit addressing
The driver current is different for the “basic colours” (R, G and
B) of each LED package. The “red” and “blue” LED’s of each
package need a driver current of 150 mA, the “green” LED
need a driver current of 200 mA. Refer to figure “Ambient Light
module driving” for details. Each unit need a 12 V supply to
drive the LED’s.
Figure 9-27 Ambient Light module driving
The configuration shown in figure “Ambient Light module
driving” is implemented
two
times per module.
9.9.1
Two sided AmbiLight Addressing
In case of two sided AmbiLight, 6 data bytes are used to
address the units, 3 bytes for each lamp unit. They are driven
by Pulse Width Modulation (PWM). Refer to figure “Lamp unit
addressing” for details.
Figure 9-28 Lamp unit addressing
Two sided units use address “6A” + 6 bytes (RGB RGB).
H_16770_139.eps
130707
TV520 SSB
(= I2C AmbiLight master)
First
Second AmbiLight Unit
AmbiLight Unit
I2C + 2 selection lines
Supply
5pin
4pin
7pin
7pin
I2C + 1 selection line
Sel = low/low
Sel = low/high
SUPPLY
H_16770_140.eps
130707
2 selection lines connected
to Ground
1 selection line connected
to Ground
Lamp unit A
Lamp unit A
Time
6 data bytes
Received by
first AmbiLight module
Received by
Second AmbiLight module
H_16770_141.eps
130707
µ
Pr
oce
ss
o
r
PWM out
+12V
I²C
Selection
lines
Constant current
driver ic
Constant current
driver ic
Constant current
driver ic
One LED package
150mA
150mA
200mA
H_16770_140.eps
130707
2 selection lines connected
to Ground
1 selection line connected
to Ground
Lamp unit A
Lamp unit A
Time
6 data bytes
Received by
first AmbiLight module
Received by
Second AmbiLight module