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The difference between LCD splicing screen and LED splicing screen


From the display effect comparison display device's final effect is the core purchase standard, and different display technologies must have some advantages and disadvantages in the effect. Shanghai LED floor tile screen please see the table below for comparison parameter LED display LCD splicing The screen brightness is high, the medium contrast is high, the general resolution is generally high, and the color range is high depending on the light source.

In terms of brightness, the two stitching techniques do not have to worry about not being enough. On the contrary, small-pitch LEDs with high brightness are facing too bright problems - a major marketing technique for small-pitch LEDs is "low brightness." In contrast, liquid crystals are more suitable for brightness levels and are suitable for large display applications. On the contrast indicator, the small-pitch LED is the highest, and from the demand side, the contrast of the two technologies exceeds the actual display requirement and the resolution limit of the human eye. This makes the contrast effect more dependent on the optimization of the software, rather than the hardware limit.

On the resolution index, although the small-pitch LED has been breaking through, it still cannot compete with the LCD splicing. At present, only the liquid crystal that can realize the popularization of 2K on the 55-inch unit is more liquid crystal in the future. For small-pitch LEDs, higher pixel density means that the difficulty of stability design increases geometrically, with pixel pitches reduced by 50% and backplane density increased by a factor of four. This is why small-pitch LEDs have broken through the bottlenecks of 1.0, 0.8, and 0.6, and the real large number of applications still only have 3.0, 2.5, and so on. In addition, it is worth reminding that the "real value of liquid crystals with pixel density advantages is not very clear," because users rarely demand such high pixel densities.

Color range This indicator is generally not the most concerned direction for video wall products. In addition to the emphasis on applications such as radio and television, the demand for color reproduction range has never been harsh. From a comparative perspective, small pitch LEDs are natural wide color gamut products. The liquid crystal depends on which light source is used.

The color resolution indicator is the actual viewing experience of the color range on the contrast indicator, representing the ability of the display to ultimately restore color. There is no quantitative method for determining this indicator. However, the overall small-pitch LEDs are inevitably the best technology due to the dual advantages of color and contrast.

LCD (short for Liquid Crystal Display) liquid crystal display.

The structure of the LCD is to place a liquid crystal cell in two parallel glass substrates, a TFT on the lower substrate glass, a color filter on the upper substrate glass, and a control signal and voltage change on the TFT to control the rotation direction of the liquid crystal molecules, thereby It achieves the purpose of controlling whether the polarized light of each pixel is emitted or not.

Light-emitting diodes are simply referred to as LEDs. It is made of a compound containing gallium (Ga), arsenic (As), phosphorus (P), nitrogen (N), or the like.

When electrons and holes recombine, they can radiate visible light, and thus can be used to make light-emitting diodes. Used as an indicator light in circuits and instruments, or as a text or digital display. The gallium arsenide diode emits red light, the gallium phosphide diode emits green light, the silicon carbide diode emits yellow light, and the gallium nitride diode emits blue light. Organic light-emitting diodes OLED and inorganic light-emitting diode LEDs are further classified by chemical properties.