Appendix | Sony KDL32EX308, KDL22EX308 specs

Chapter 4 - Appendix

Figure 4-1 illustrates a typical LCD panel and the associated video processing circuits as found in the WAX3 chassis. The various formats and resolutions of video signals are processed on the BU1 board. All video signals exit the video processor in the native resolution of the LCD panel. In this design, the resolution is for a 1366 by 768 at 60HZ refresh rate panel. 48 horizontal lines are discarded to match up to the 720p resolution of the ATSC speciﬁcations so the video will exit as 720p.

The LCD panel used in this model processes 8-bit RGB video data. Before the video information can be sent to the TCON board it must be converted to a format that allows for practical and noise-free transmission. The large number of parallel lines to transmit the 8-bit RGB data would need to be sent on differential lines for noise reduction. This would require 48 lines just for the video. The TCON circuit also requires B+, ground connections, a communications bus, sync, and a clocking line transmitted differentially so we can see that up to 60 lines would be required for an 8-bit video signal and signiﬁcantly more lines for a 10-bit processor. The practical way to transmit this information is to convert the parallel video data to a serial stream and this is accomplished by the Low-Voltage Differential Signaling (LVDS) transmitter.

The LVDS transmitter contains a circuit to serialize the parallel data. The parallel video information along with sync and clocking data are transmitted via twisted line pairs. Depending on the logic level, current is sent along one or the other of the twisted pair of wires. The receiving end of the wires is loaded with a resistor (usually around 100 to 120 ohms). The receiver detects the polarity of the voltage drop across the resistor to determine the logic level. The current level swings in the wire are about 3ma with a voltage differential of around 350mv. This allows for transmission of the video signal with minimal EMI.

The LVDS receiver on the TCON board converts the serialized data back to parallel. This data is processed by the timing control IC to allocate the RGB data into serial streams for processing by the LCD panel. The TCON transmits the pixel control data to the panel via ﬂat, ﬂexible circuit board cables which can number 2 or 4 depending on the bit rate and refresh timing of the panel. A 1366 X 768 panel requires about 180 lines to transmit control information and B+ from the TCON. This number of

control lines is not even close to the number of horizontal or vertical rows of pixels so the LCD panel must use this information to further expand the ability to turn on each individual crystal. The process will be explained in the gate and source driver paragraphs.

All of this is accomplished by the TCON board. The term “TCON” is short for Timing Control. Other LCD panel manufacturers may have a different name for this particular circuit but the term used by Sony will always be TCON.

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KDL22EX308, KDL32EX308 specifications

The Sony KDL22EX308 and KDL32EX308 televisions are part of Sony's Ex Series, renowned for delivering high-quality viewing experiences in compact screen sizes. Designed primarily for smaller spaces, such as bedrooms, kitchens, or dormitories, these models effectively boast an array of features that enhance their usability and performance.

One of the standout characteristics of both models is their LED backlighting technology, which ensures bright images and remarkable color accuracy. This technology also contributes to energy efficiency, making them eco-friendly choices for consumers. The KDL22EX308 comes with a 22-inch display, while the KDL32EX308 offers a larger 32-inch screen, appealing to users who need a bit more screen real estate without major compromises on space.

Both models support a 720p HD resolution, which provides crisp and clear images perfect for everyday viewing. They incorporate Sony’s Motionflow XR technology, which minimizes motion blur during fast-paced scenes, making them ideal for watching sports, action films, or playing video games. This feature enhances the overall viewing experience by ensuring that moving images remain smooth and fluid.

Connectivity also plays a significant role in the usability of the KDL22EX308 and KDL32EX308 televisions. They come equipped with multiple HDMI inputs that allow users to connect various devices such as gaming consoles, Blu-ray players, and streaming boxes with ease. Additionally, a USB port permits users to view photos and videos directly from a USB stick, adding to their versatility.

Furthermore, both models incorporate a built-in digital tuner, enabling access to free over-the-air HD broadcasts. This feature allows viewers to enjoy a variety of channels without the need for a cable subscription, making it a cost-effective entertainment solution.

Another significant aspect of these models is Sony's Clear Resolution Enhancer technology, which enhances image clarity by upscaling lower resolution content, thus delivering a more enjoyable viewing experience across various media.

In conclusion, the Sony KDL22EX308 and KDL32EX308 televisions combine advanced technologies and features within compact designs, making them excellent choices for anyone seeking high-quality visual performance in smaller spaces. Their efficient connectivity options, superior image quality, and energy-saving capabilities position them as modern and practical entertainment solutions.