In this blog post, we’ll explore how the way we use TVs has changed and summarize the key features of Smart TVs.
Introduction
When watching cartoons or documentaries set in the past, we often see scenes where neighbors gather around a small black-and-white TV to watch popular shows together. Now, some 50 years after TVs first became widespread in the late 1950s, the way people use TV has changed significantly. Once dubbed the “idiot box” and used merely to passively receive content according to broadcasters’ schedules, the device has evolved into a smart device that communicates with viewers and provides a variety of services. In this post, we will take a step-by-step look at the background of this change and the key features offered by Smart TVs.
Main Body
The Shift from Passive Information Reception to Interactive Information Exchange
Early televisions focused solely on receiving signals from broadcasters and reproducing them as video and audio. Viewers could only passively watch programs at scheduled times; they had no way to convey their opinions to broadcasters or request specific content. This was because the technology was implemented as a one-way transmission and reception system. While one-way communication was simple and cost-effective in terms of design and operation, transmitting video and audio nationwide still required complex processing. For example, video signals had to be generated and sent, and the receiving end had to reassemble them into video and audio for real-time display, so the initial systems had no choice but to start with a one-way approach.
However, with the convergence of communication technology and the internet, Smart TVs have come to support two-way communication. TVs have evolved beyond simple broadcast receivers to serve a variety of purposes, including web browsing, accessing social media, running applications, and making video calls. It is now possible to immediately search for information that piques your curiosity while watching a broadcast, or to leave comments and chat with friends while watching a program. Additionally, VOD (Video on Demand) services allow users to play the content they want at the time they want, without being constrained by broadcast schedules, leading to a fundamental shift in viewing patterns.
Changes in TV Depth Due to Changes in Screen Display Methods
In the past, cathode ray tube (CRT) TVs required a thick chassis equipped with an electron gun and vacuum tubes behind the screen, resulting in a depth that was disproportionately large relative to their size and imposing significant constraints on space and interior design. In contrast, flat-panel displays use a fundamentally different method to construct the screen, significantly reducing the space required at the back. Unlike CRT TVs, which created images by scanning electrons, flat-panel displays generate images using flat backlights or light-emitting elements, allowing for much thinner and wider screens.
This shift reduced TV thickness to a matter of millimeters and enabled the creation of thin, large screens, giving them aesthetic value as part of living room decor. Today’s Smart TVs have made significant design advancements, with features like ultra-thin profiles—as thin as a coin—being highlighted.
From Low-Resolution Black-and-White to High-Definition Color and 3D
Early low-resolution black-and-white images soon evolved into color broadcasting. Subsequently, advancements in microtechnology and display technology, along with improvements in the transmission and reception signals themselves, led to the widespread adoption of high-definition (HD) and higher-resolution standards. In particular, the transition from analog to digital broadcasting enabled the transmission of more information in a shorter time, which served as a key driving force behind the improvement in picture quality.
Recently, technology that allows viewers to enjoy 3D content by wearing special glasses has also been commercialized. 3D works by providing different signals to the left and right eyes to create a sense of depth. However, there is still room for improvement in terms of practicality, such as the need to wear glasses and the limited viewing angles. Nevertheless, compared to 50 years ago, the emergence of 3D technology represents a remarkable advancement.
Conclusion
Over the past few decades, the TV has evolved beyond its role as a mere broadcast receiver into a multifunctional device that integrates communication and the internet. Smart TVs have expanded the user experience through various innovations, including two-way communication, web browsing and app execution, VOD and live content control, thin and large flat-panel displays, and high-resolution and 3D video.
However, challenges remain, such as limitations in full-fledged browsing, a lack of smartphone-level application compatibility, and the limitations of input devices for TV control. The current control method, which relies solely on a remote control, needs to be supplemented with more convenient input methods such as touch, gestures, and voice recognition. From a personal perspective, these unfinished elements also signify that there is ample room for Smart TVs to develop further in the future.
Ultimately, TVs will continue to evolve in line with technological advancements, and the ways viewers use them will expand accordingly. It is fascinating to understand the changes brought about by today’s Smart TVs while imagining what the next evolution of TV might look like.
