Every Smartphone Display Types Explained | LCD, TFT, IPS, OLED, AMOLED, P-OLED, LTPS, LTPO — Transcript

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1. 0:00LCD, TFT, IPS, OLED, AMOLED, P OLED,
2. 0:03LTPS, LTPO. Briefly explained, LCD
3. 0:06displays represent the foundation on
4. 0:08which most smartphone screens were built
5. 0:09for more than a decade. An LCD screen
6. 0:12uses a rear light source known as a
7. 0:14backlight, while liquid crystals control
8. 0:16how this light passes through red,
9. 0:18green, and blue sub pixels to form the
10. 0:20image. Because the backlight is always
11. 0:22on, blacks are not truly black and
12. 0:25contrast is more limited. On the other
13. 0:27hand, LCD screens are stable. do not
14. 0:30suffer from burn-in and can deliver good
15. 0:32brightness levels. For LCD technology to
16. 0:34be used efficiently on phones, a more
17. 0:36precise method of pixel control was
18. 0:38required. This led to the introduction
19. 0:40of TFT, thin film transistor liquid
20. 0:43crystal display. TFT uses a matrix of
21. 0:45transistors that allows each pixel to be
22. 0:47controlled individually. As a result,
23. 0:49higher resolutions, stronger contrast,
24. 0:51and a more stable image became possible.
25. 0:54Samsung SGHT100 released in 2002 was one
26. 0:57of the first mobile phones equipped with
27. 0:59a TFT LCD display, marking the
28. 1:01transition from passive matrix screens
29. 1:03to active matrix displays on mobile
30. 1:05devices. Over time, manufacturers
31. 1:07developed several display types derived
32. 1:09directly from TFT, including TN and IPS.
33. 1:13TN or twisted pneumatic is a simple type
34. 1:16of TFT panel in which the twisting
35. 1:18behavior of the liquid crystals limits
36. 1:20color reproduction and viewing angles.
37. 1:22For this reason, it was mostly used on
38. 1:24entry-level phones.
39. 1:27IPS inplane switching. IPS is an
40. 1:30evolution of TFT LCD displays, improving
41. 1:33colors and viewing angles, while still
42. 1:35retaining the inherent limitations of
43. 1:37LCD technology, such as imperfect blacks
44. 1:39and potentially higher power consumption
45. 1:41depending on the implementation.
46. 1:44At the same time, some manufacturers
47. 1:46introduce their own LCD optimizations
48. 1:48tailored specifically for smartphones.
49. 1:50For example, [music] Super PLS
50. 1:52planeto-line switching is Samsung's
51. 1:54alternative to IPS. [music] It offers
52. 1:56higher brightness and wide viewing
53. 1:58angles.
54. 2:00Super LCD is an optimized version of IPS
55. 2:03LCD popularized by HTC, which integrates
56. 2:06the touch layer more efficiently with
57. 2:07the display panel. This results in a
58. 2:09sharper image, reduced reflections, and
59. 2:11better visibility in bright light.
60. 2:14However, all of these limitations
61. 2:15eventually led to the emergence of a
62. 2:17completely different technology, OLED,
63. 2:20organic light emmitting diode. Unlike
64. 2:22LCD displays, an OLED screen no longer
65. 2:25requires a light source behind the panel
66. 2:27because each pixel lights up
67. 2:28individually and produces its own light.
68. 2:31This completely changes the way the
69. 2:33image looks. When a pixel needs to
70. 2:34display black, it simply turns off,
71. 2:36resulting in true blacks, much higher
72. 2:38contrast, and an image that feels deeper
73. 2:41and more alive. Another important
74. 2:43advantage of OLED is power efficiency in
75. 2:45certain scenarios. Because pixels only
76. 2:47light up where needed, dark user
77. 2:49interfaces or dark mode can consume less
78. 2:51power than on an LCD display. There are,
79. 2:54however, some limitations. The organic
80. 2:56materials used in OLED panels degrade
81. 2:59over time, and prolonged display of
82. 3:00static elements can lead to burn-in,
83. 3:03meaning permanent image retention on the
84. 3:05screen. To reduce these problems and
85. 3:07adapt OLED to the demands of modern
86. 3:08smartphones, the technology was
87. 3:10gradually created, resulting in several
88. 3:12variants. AMOLED active matrix OLED.
89. 3:16AMOLED is the mature form of OLED
90. 3:18technology used in [music] smartphones.
91. 3:20It relies on an active matrix of
92. 3:21transistors that controls each pixel
93. 3:23individually. This allows for smoother
94. 3:26displays, very fast response times, and
95. 3:28improved power efficiency in certain use
96. 3:30cases. In practice, most OLED screens
97. 3:33found on smartphones today are AMOLED
98. 3:35panels. P OLED, also known as flexible
99. 3:38OLED, uses a plastic substrate instead
100. 3:40of glass, enabling curved or foldable
101. 3:43displays. In terms of image quality, it
102. 3:45is similar to AMOLED, but its key
103. 3:47advantage is physical flexibility, which
104. 3:49is essential for foldable smartphones.
105. 3:52LTPS OLED, low temperature
106. 3:54polyrystalline silicon. LTPS OLED uses
107. 3:57more efficient transistors to control
108. 3:58pixels, enabling high resolutions and
109. 4:01high pixel densities. This technology
110. 4:03helps keep power consumption better
111. 4:04controlled and is widely used in modern
112. 4:06smartphone OLED displays.
113. 4:09LTPO, low temperature polyrystalline
114. 4:12oxide. LTPO OLED is the most important
115. 4:15recent evolution of OLED technology for
116. 4:17smartphones. [music] It allows dynamic
117. 4:19refresh rate adjustment from very low
118. 4:21values such as 1 Herz up to 120 Hz
119. 4:24depending on the content being
120. 4:25displayed. [music]
121. 4:26This way the display remains smooth when
122. 4:28needed while energy consumption becomes
123. 4:30much more efficient. It is important to
124. 4:33note that many manufacturers use their
125. 4:35own branding for displays. [music] In
126. 4:36most cases, these are marketing terms
127. 4:38that describe optimizations of existing
128. 4:40LCD or OLED panels rather than
129. 4:43completely different technologies. If
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133. 4:51it really helps us out. Thank you.
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