Techwell
Techwell
LCD DIsplay Processors
Target Applications
Techwell’s TW8806 LCD display processor is a low cost high quality TFT
panel controller with an embedded NTSC/PAL/SECAM TV decoder. This
unique level of mixed signal integration enables the panel to be used as a
stand-alone LCD display for in car entertainment, portable DVD and
portable LCD TV applications. An integrated triple analog-to-digital
converter supports YPbPr/RGB component input and allows direct
connection to DVD and Navigation sources. In addition, flexible digital
inputs supports 24bit Digital RGB and 8/16/24-bit YCbCr inputs.
The TW8806 contains all the logic required to convert standard TV, DTV,
and PC monitor signals to the digital control and data signals required to
drive various TFT panel types. It supports TFT panel resolutions
The chip has nine analog inputs. This enables a number of input
combinations simultaneously. For example, the chip can accept up 4 CVBS
inputs simultaneously.The chip can also accept one CVBS, one S-Video, one
The integrated analog front-end contains three ADCs with three clamping
circuits and one Automatic Gain Control (AGC) circuit to minimize external
component count. It employs a 4H, 5-line adaptive comb filter and
proprietary Y/C processing technologies to produce exceptionally high
The chip's internal logic synchronizes the panel frame rate to the incoming
input frame rate. A high quality image-scaling engine is used to convert
the lower resolution formats or high resolution DTV formats to the output
panel resolution. An internal de-interlacing engine also allows interlaced
On Screen Display is supported through an on-chip OSD RAM for
maximum flexibility. A closed caption decoder is built in. The TW8806 also
accepts a 24 bit digital RGB input from external PanelLinkTM receiver or
ADCs for use as computer monitor. In addition, it accepts 8/16/24 bits
digital
YCbCr
input
for
use
with
external
ADCs
for
use
The TW8806 also supports TFT panel power sequencing, DPMS (VESATM
Display Power Management Signaling) signaling and power management.
The control interface is a 2-wire serial bus interface. The TW8806 core
operates at 1.8 V, the IO at 3.3 V and packaged in a 128-pin PQFP package.
TW8806
Portable TV
Rear Seat Car Display
Portable DVD
Navigation + DVD
Door Phone
DMB TV
In Flight Display
LCD Display Processors
with built-in Video Decoder and T-CON
LCD Display Processors
with built-in Video Decoder and T-CON
Features
quality pictures.
videotobesupported.
Integrated high performance
NTSC/PAL/SECAM video decoder
Built in high quality De-interlacing engine
Black / white / blue stretch for higher contrast
Favorite color enhancement
Integrated timing controller (T-CON) with
digital and analog panel support
QVGA up to WXGA panel resolution support
Low power consumption (600 mW)
Small form factor 128-pin PQFP
Video Decoder and Processing
Three 9-bit ADCs and analog clamping circuit
Fully programmable static gain or automatic
gain control for the Y or CVBS channel
Programmable white peak control for the Y or
CVBS channel
Software selectable analog inputs allows any
of the following combinations:
Up to 4 composite video
Up to 2 S-Video
1 YPbPr component
1RGB
4-H adaptive comb filter Y/C separation
Image enhancement with 2D dynamic peaking
and CTI
Programmable hue, brightness, saturation,
contrast, sharpness, Gamma control, and noise
supression
Detection of level of copy protection according
to Macrovision standard
Buffered CVBS output
up to 1280 by 768 with 1-pixel/clock formats.
as DTV monitor.
TECHWELL
DISPLAY
component and one analog RGB simultaneously.