SD1010D Datasheet, PDF (15/40 Pages) List of Unclassifed Manufacturers – Digital Interface VGA TFT LCD Display Controller

viii) Sharpness Enhancement
No matter how many times the original image got enlarged or shrunk by the internal
interpolator. With the embedded powerful DSP arrays, SD1010D always can enhance the
overall image sharpness (edge) to different degree for the various requirements. The sharpness
can be adjusted bi-directionally which means either going sharper or softer to certain point set
by the user. It’s easy to activate the sharpness enhancement by program “sharpness control”
register.
OSD mixer and LCD interface
At the output stage, the SD1010D performs the OSD mixer function, and then generates the 24-
bit / 48-bit RGB signal to the LCD panel with the correct timing.
ix)
OSD mixer
In the OSD mixer block, the SD1010D mixes the normal output RGB signal with the OSD
signal. The OSD output data is generated based on the “R_OSD”, “G_OSD” and “B_OSD” pins
as well as the “OSD Intensity” data in EEPROM entry. When the “EN_OSD” is active high, the
OSD is active, and the SD1010D will send the OSD data to the LCD panel. The OSD has 16
different color schemes based on the combinations of the three OSD color pins and the “OSD
Intensity” data. When R_OSD=1, and OSD_Intensity=0, the SD1010D will output 128 to the
output red channel, R_OUT. When R_OSD=1 and OSD_Intensity=1, the SD1010D will output
255. The same scheme is used for G_OSD to G_OUT and for B_OSD to B_OUT.
As part of the mixer control function, the SD1010D implements three mixing control registers,
“OSD R Weight” (38H), “OSD G Weight”(39H), and “OSD B Weight” (3AH). The mixing
equation is shown below:
R_OUT = (R_OSD) * (OSD R Weight/255) + R * (1 - OSD R Weight/255)
G_OUT = (G_OSD) * (OSD G Weight/255) + G * (1 - OSD G Weight/255)
B_OUT = (B_OSD) * (OSD B Weight/255) + B * (1 - OSD B Weight/255)
When the weight is 255, the OSD output will overlay on top of the normal output. When the
weight is 0, the OSD output is disabled.
x)
LCD interface
The SD1010D support both 24- and 48-bit RGB interfaces with XGA LCD panels from various
panel manufacturers. The LCD panel resolution and timing information is stored in the external
EEPROM. The information in the EEPROM includes timing related to the output back porch,
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