The first commercially available television sets in the 1930s used cathode ray tubes (CRTs), which functioned by firing electrons onto a phosphor-coated screen.

Early CRTs were round, not rectangular, because the electron beam naturally created a circular image.

The first televisions often had screens smaller than 10 inches, yet were housed in cabinets the size of furniture.

Early televisions required a warm-up period because their vacuum tubes needed to reach operating temperature.

Some vintage models produced a faint ozone smell from the high-voltage CRT components.

CRT televisions used up to 30,000 volts to accelerate the electron beam.

Due to magnetic deflection, CRT images could be distorted by nearby speakers or magnets.

Placing a magnet on the screen could create psychedelic color patterns from phosphor distortion, though this could permanently damage the set.

CRT screens were coated with lead glass to shield viewers from X-rays generated by the tube.

The sets were extremely heavy because the glass face had to withstand the internal vacuum pressure.

Color television originally worked by combining red, green, and blue phosphors arranged in tiny dots or stripes.

Early color sets were so expensive that in the 1960s, one could cost more than a used car.

Color TVs used a shadow mask to ensure electron beams hit the correct red, green, and blue phosphor dots.

The bleeding colors effect on older sets was caused by poor convergence of these electron beams.

The first mass-market color television contained 35 vacuum tubes.

In the United States, color television was a luxury in the 1950s and 1960s.

It became a standard household item around 1972 or 1973.

Several key factors drove this shift: prices finally dropped, all major networks were broadcasting most of their shows in color, and major events like the 1969 moon landings motivated people to upgrade.

Japan followed a similar, fast-paced timeline.

The 1964 Tokyo Olympics were a major showcase for color broadcasting, and thanks to the country’s strong economy, most Japanese families owned a color TV by about 1973.

In Western Europe, adoption moved more slowly.

Countries like the United Kingdom and West Germany did not begin regular color broadcasts until 1967.

In the UK, popular shows in color helped it become common in homes by 1976 or 1977.

For West Germany, the 1972 Munich Olympics were a significant turning point, and color sets became standard there by the late 1970s.

Elsewhere, local factors decided the timeline.

Canada’s experience was nearly identical to America’s, occurring in the early 1970s.

Australia, however, did not start official color broadcasts until 1975, triggering a rapid rush to buy sets and making color TV standard by around 1980.

In the Soviet Union and Eastern Europe, color televisions were expensive, state-controlled luxuries for much longer, only becoming common in the mid-1980s.

So, while the first color broadcasts happened in the 1950s, it was truly the decade of the 1970s when the living room picture changed from black and white to color for most people in the developed world.

Plasma televisions used tiny cells filled with ionized gas functioning like millions of microscopic neon signs.

Plasma screens originally suffered from burn-in, where static images left permanent ghosts.

Plasma TVs were the first large, flat screens affordable to consumers.

Their screens naturally produced deep black colors, making them a favorite for home theater enthusiasts.

The last major manufacturer of plasma TVs, Panasonic, ended production in 2014.

LCD televisions do not create light; they rely on a backlight shining through liquid crystals.

Early LCD TVs used CCFL backlights (cold cathode fluorescent lamps) instead of LEDs.

Modern LED TVs are actually LCD panels with LED backlighting.

LED-lit TVs can use either edge lighting or full-array lighting.

Response time issues in LCDs can cause motion blur, especially on older models.

Some high-end LCDs use mini LED backlights with thousands of dimming zones.

Quantum dot televisions use nanoparticles that glow in precise colors when hit with light.

OLED pixels emit their own light, requiring no backlight and creating perfect black levels.

Each OLED pixel is made of organic materials that degrade over time, which is why maximum brightness is often limited.

OLED screens are exceptionally thin because they are composed of only a handful of layers.

OLED displays are naturally flexible, enabling curved or rollable televisions.

OLED panels use millions of self-emissive subpixels up to 24 million on an 8K display.

Television backlights typically use a specific blue LED coated with yellow phosphor to create white light.

A 4K TV has over 8 million pixels; an 8K TV has over 33 million pixels.

At normal viewing distances, the human eye cannot distinguish individual pixels on a 4K TV below 55 inches unless sitting unusually close.

The largest commercial television resolution ever demonstrated was 16K, built by Sony using modular panels.

Many 8K consumer televisions upscale most content because hardly any native 8K material exists.

TVs advertise 120 Hz, 240 Hz, or even 480 Hz, but most achieve this through motion interpolation, not a true refresh cycle.

Many smart televisions have less RAM than a budget phone, sometimes just 1 or 2 gigabytes.