In today's increasingly thin and light, have you ever thought that thin is not necessarily good? For television, this issue is not necessarily true.
What determines the quality of the TV? I'm afraid most people think of it as a display panel. That's right. However, the panel itself does not emit light, so imaging requires another crucial component - the backlight. Therefore, the backlight source is the most direct factor that can determine the quality of the TV in addition to the panel.
The backlights of display devices mainly include EL, CCFL, LED, and HCFL. For today's TVs, LED is the most widely used backlight source. Today, we will discuss the effect of LED backlight mode on the quality of TVs.
What is LED
LED (Light Emitting Diode), a light emitting diode, is mainly composed of five kinds of materials: bracket, silver paste, wafer, gold wire, and epoxy resin. It is a semiconductor that can convert electrical energy into light energy. It changes the tungsten of incandescent lamps. Silk light emission and energy-saving lamp trichromatic powder light emission principle, and the use of electric field light. The characteristics of the LED are very obvious, long life, high luminous efficiency, low radiation, and low power consumption are the mainstream light sources currently used in display devices.
LED backlight classification
Backlights are categorized. LED backlights can also be categorized into two categories. First, according to the color of the light source emitted by the LED, it is divided into a white LED backlight source and an RGB-LED backlight source. Generally, TVs on the market use a white LED with a lower cost. Second, according to the incident location can be divided into: direct type and side into the two major categories, which is the difference between the widely used backlight source. Today we are talking about direct-lit and side-entry backlights divided by incident position.
Direct type LED backlight
The direct type is that the LED light emitting crystal grains are evenly arranged behind the liquid crystal panel as a light source, so that the backlight can be uniformly transmitted to the entire screen, and the details of the screen are more exquisite and vivid. The advantage is that it can set different backlight module authority areas, theoretically, each LED can independently control the brightness of the light control, but due to the cost problem, it is actually to set multiple areas, so that these areas can be independently adjusted light and dark degree.
Side-entry backlight will appear dark in the middle of the four corners
Side-entry LED backlight
The edge-in LED backlight source is configured with LED dies arranged on the edges of the LCD screen. When the LED backlight module emits light, the light emitted from the edge of the screen is transmitted through the light guide plate to the central area of ​​the screen. . There are two advantages of the edge-entry LED backlight. One is to use fewer LED die, which saves costs. The second is to create a relatively thin body, so that the rear of the LED-backlit TV LCD panel does not need to be configured. The LED module, placed on the side, reduces the overall thickness of the screen and creates a thinner model than a direct-lit LED-backlit LCD TV.
Comparison of the advantages and disadvantages of the two
Side-entry LED-backlit TVs are thin and can be very thin and stylish. However, the number of LED chips used is relatively small, and the light is sent to the screen through the light guide plate. This will cause the brightness of the periphery of the LED TV screen to be brighter than the center of the screen, and the edge area of ​​the screen will be smaller than The temperature in the middle of the picture is high, and the effect on picture quality is not good for some dark pictures.
Compared with the side-entry type, the direct type LED backlight has to use more LED dies. The advantage is that it can set different areas of the backlight module responsibilities, in theory, each LED can independently control the brightness, However, the line and design costs are not easy. In fact, multiple areas are set in the backlight of the screen, so that these areas can independently adjust the brightness. The disadvantage of the direct type is that it is too thick, and the cost is slightly higher than the side-entry type, but the control of the backlight area is stronger than the side-entry type, and the picture quality performance is better. Nearly straight-down LED TVs that have been converted from CCFL's traditional light source die to LED die have been favored by more high-end consumers.
Purchase guide
The cost of side-entry LED backlights is low, so most of the current mainstream use is the so-called ultra-thin LED TVs. For the average home user, the edge-entry LED backlight has been able to meet the needs of its quality experience. However, if it is for high-end users and audiophiles with high requirements for picture quality, the disadvantages of edge-type backlights are somewhat unacceptable. For them, direct-lit backlights are more suitable.
However, with the development of technology, direct-type LED backlighting can also be made thinner and thinner. Today, ultra-thin direct-lit LED backlighting televisions are appearing. The thickness of the body is not much worse than that of the side-entry type, and both the picture quality and the thickness are The demanding consumer is free from entanglement.
Smart TV/box information can focus on smart TV information network sofa butler (http://), China's influential TV box and smart TV website, providing information, communication, TV boxes, smart TVs, smart TV software, etc. Answering questions.
What determines the quality of the TV? I'm afraid most people think of it as a display panel. That's right. However, the panel itself does not emit light, so imaging requires another crucial component - the backlight. Therefore, the backlight source is the most direct factor that can determine the quality of the TV in addition to the panel.
The backlights of display devices mainly include EL, CCFL, LED, and HCFL. For today's TVs, LED is the most widely used backlight source. Today, we will discuss the effect of LED backlight mode on the quality of TVs.
What is LED
LED (Light Emitting Diode), a light emitting diode, is mainly composed of five kinds of materials: bracket, silver paste, wafer, gold wire, and epoxy resin. It is a semiconductor that can convert electrical energy into light energy. It changes the tungsten of incandescent lamps. Silk light emission and energy-saving lamp trichromatic powder light emission principle, and the use of electric field light. The characteristics of the LED are very obvious, long life, high luminous efficiency, low radiation, and low power consumption are the mainstream light sources currently used in display devices.
Color + backlight
LED backlight classification
Backlights are categorized. LED backlights can also be categorized into two categories. First, according to the color of the light source emitted by the LED, it is divided into a white LED backlight source and an RGB-LED backlight source. Generally, TVs on the market use a white LED with a lower cost. Second, according to the incident location can be divided into: direct type and side into the two major categories, which is the difference between the widely used backlight source. Today we are talking about direct-lit and side-entry backlights divided by incident position.
Direct type LED backlight
The direct type is that the LED light emitting crystal grains are evenly arranged behind the liquid crystal panel as a light source, so that the backlight can be uniformly transmitted to the entire screen, and the details of the screen are more exquisite and vivid. The advantage is that it can set different backlight module authority areas, theoretically, each LED can independently control the brightness of the light control, but due to the cost problem, it is actually to set multiple areas, so that these areas can be independently adjusted light and dark degree.
Side-entry backlight will appear dark in the middle of the four corners
Side-entry LED backlight
The edge-in LED backlight source is configured with LED dies arranged on the edges of the LCD screen. When the LED backlight module emits light, the light emitted from the edge of the screen is transmitted through the light guide plate to the central area of ​​the screen. . There are two advantages of the edge-entry LED backlight. One is to use fewer LED die, which saves costs. The second is to create a relatively thin body, so that the rear of the LED-backlit TV LCD panel does not need to be configured. The LED module, placed on the side, reduces the overall thickness of the screen and creates a thinner model than a direct-lit LED-backlit LCD TV.
Comparison of the advantages and disadvantages of the two
Side-entry LED-backlit TVs are thin and can be very thin and stylish. However, the number of LED chips used is relatively small, and the light is sent to the screen through the light guide plate. This will cause the brightness of the periphery of the LED TV screen to be brighter than the center of the screen, and the edge area of ​​the screen will be smaller than The temperature in the middle of the picture is high, and the effect on picture quality is not good for some dark pictures.
Compared with the side-entry type, the direct type LED backlight has to use more LED dies. The advantage is that it can set different areas of the backlight module responsibilities, in theory, each LED can independently control the brightness, However, the line and design costs are not easy. In fact, multiple areas are set in the backlight of the screen, so that these areas can independently adjust the brightness. The disadvantage of the direct type is that it is too thick, and the cost is slightly higher than the side-entry type, but the control of the backlight area is stronger than the side-entry type, and the picture quality performance is better. Nearly straight-down LED TVs that have been converted from CCFL's traditional light source die to LED die have been favored by more high-end consumers.
Purchase guide
The cost of side-entry LED backlights is low, so most of the current mainstream use is the so-called ultra-thin LED TVs. For the average home user, the edge-entry LED backlight has been able to meet the needs of its quality experience. However, if it is for high-end users and audiophiles with high requirements for picture quality, the disadvantages of edge-type backlights are somewhat unacceptable. For them, direct-lit backlights are more suitable.
However, with the development of technology, direct-type LED backlighting can also be made thinner and thinner. Today, ultra-thin direct-lit LED backlighting televisions are appearing. The thickness of the body is not much worse than that of the side-entry type, and both the picture quality and the thickness are The demanding consumer is free from entanglement.
Smart TV/box information can focus on smart TV information network sofa butler (http://), China's influential TV box and smart TV website, providing information, communication, TV boxes, smart TVs, smart TV software, etc. Answering questions.
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