science

Handheld television

Handheld television is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Handheld television rather than just read about it. In short: A handheld television is a portable device for watching television that usually uses a TFT LCD or OLED and CRT color display. Many of these devices resemble handheld transistor radios.

Key takeaways

Handheld television belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Handheld television to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Handheld television from memory before moving on to harder problems.

Reference excerpt

A handheld television is a portable device for watching television that usually uses a TFT LCD or OLED and CRT color display. Many of these devices resemble handheld transistor radios. Unlike smartphones and tablets which have apps for viewing one's entire pay-TV subscription on them, handheld TVs are only able to receive local TV stations.

History

In 1970, Panasonic released the first TV which was small enough to fit in a large pocket; called the Panasonic IC TV MODEL TR-001 and Sinclair Research released the second pocket television, the MTV-1. Since LCD technology was not yet mature at the time, the TV used a minuscule CRT which set the record for being the smallest CRT on a commercially marketed product. Later in 1982, Sony released their first model - the FD-200, which was introduced as “Flat TV” later renamed after the nickname Watchman, a play on the word Walkman. It had grayscale video at first. Several years later, a color model with an active-matrix LCD was released. Some smartphones integrate a television receiver, although Internet broadband video is far more common. Since the switch-over to digital broadcasting, handheld TVs have reduced in size and improved in quality. Portable TV was eventually brought to digital TV with DVB-H, although it didn't see much success.

Hardware

These devices often have stereo 1⁄8 inch (3.5 mm) phono plugs for composite video-analog mono audio relay to serve them as composite monitors; also, some models have mono 3.5 mm jacks for the broadcast signal that is usually relayed via F connector or Belling-Lee connector on standard television models. Some include HDMI, USB and SD ports. Screen sizes vary from 1.3 to 5 inches (33 to 127 mm). Some handheld televisions also double as portable DVD players and USB personal video recorders.

Size Portable televisions cannot fit in a pocket, but often run on batteries and include a cigarette lighter receptacle plug. Pocket televisions fit in a pocket. Wearable televisions sometimes are made in the form of a wristwatch.

Notable brands and models RCA - DPTM70R Sony - Watchman and Bravia Casio Sanyo Sinclair Research - MTV-1 and TV80

Illustrations

Worked examples

Example 1 — a first encounter with Handheld television

Start with the simplest possible case. Write down what Handheld television claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Handheld television before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Handheld television ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Handheld television

In research: Handheld television appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Handheld television in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Handheld television is common in secondary-school and first-year university syllabi. It links to neighbouring topics Japanese inventions, Mobile electronic devices, Mobile technology, so understanding it makes those chapters shorter.
In everyday life: Look for Handheld television outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Handheld television in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Handheld television means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Handheld television out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Handheld television in simple terms?

A handheld television is a portable device for watching television that usually uses a TFT LCD or OLED and CRT color display. Many of these devices resemble handheld transistor radios.

Why does Handheld television matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Handheld television?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Handheld television.