With the constantly updated display technology , mainstream TV is constantly refurbished. Today, LCD TV into the appliance store counters , we often see the words "LED TV" . So, what exactly is LED TV ? What are the characteristics of LED TV ? What to buy time and need to pay attention ?
Most problems many consumers face is "What is LED TV " "LED TV and LCD TV What's the difference ," and so on. In fact , LED TV only our popular name for it, strictly speaking , LED -backlit LCD TV is a more apt title.
In other words, the so-called LED TVs on the market , not a mainstream technology branch of flat-panel TVs , but the traditional CCFL backlit LCD TVs sources used to replace the new LED light source , which is essentially an LCD TV.
Well , LED as a light source , what characteristic? First, we still want to talk briefly about the imaging principle LCD TVs.
And Plasma TVs from different light source, LCD TV is a passive luminescence imaging , ie, need to use the LCD TV backlight emits light through the polarizer , then through the liquid crystal molecule layer , followed by another piece of color filter and polarizer and imaging. Since the liquid crystal molecules in the voltage fluctuation will change the angle of the arrangement of the light transmittance is changed to form an image change.
Used in traditional LCD TVs are called cold cathode fluorescent lamp CCFL backlight, as well as because of its mercury and other harmful substances , not environmentally friendly.
And a light emitting diode LED is the material known by the voltage change using the semiconductor light emitting chip , which has excellent light emitting characteristics not only better color saturation , fast response time , less light leakage . By increasing the contrast , regional control and other means , the display performance is much better than the CCFL technology. And do not contain mercury and other harmful substances, more healthy environment.
In addition , the use of LED backlight TV is thinner and lighter body , and longer life , usually LED life can reach 100,000 hours , 10 hours a day by using , you can use 27 years , compared to traditional light sources 5-6 years many long life , so popular with consumers .
In the field of television uses LED technology , Graphic LCD
Display mainly primary colors of white and two technical branches.
White LED can emit white light, after the liquid crystal layer, and then through the R / G / B color filter into a separate color. LCD TV color quality of light quality is mainly determined by the backlight . RGB backlight spectrum of light for each primary color the higher the purity , the more pure colors to restore the order in the final , only to restore the pure RGB primary colors , in order to deploy a pure and true color effects.
White LED TV is divided into two sides of the direct type and style . Using side -emitting structures can be made into a TV slim, ultra-thin LED TVs currently on the market and more are adopting this technology. Direct type white LED brightness can be adjusted locally , thus higher overall picture quality of some .
Another branch of technology that can be issued issued LED backlight technology R, G, B primary colors of light. Since the backlight RGB primary colors can be independently controlled to achieve a more wide color gamut , better color performance . While also effectively enhance the contrast of the TV , to achieve more accurate color gradation and layering more pictures , but also has three primary levels of local backlight adjustment function. Currently mainly used for high-end LCD TV.
In addition ,OLED Module some companies have developed on the basis of a more sophisticated technology, such as Sharp's Western -primary color display technology is the basis of the added RGB Y, that is yellow , so richer color performance .
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2013年12月3日星期二
What principle is leaked
LCD light leakage between the main screen is the agreement with the LCD lead frame does not close out the light transmittance of the lamp , this is a common problem in the LCD TV ,graphic lcd
128x64 or from a certain angle, a phenomenon can not be avoided , but is not the same extent .
LCD TV leaked the main reason there are two , the first is the question of the panel, when the panel is not good quality, or means of transport accidents , resulting in curved panels , so there will be a serious light leakage problem , if it is checked out at the factory in this case, the factory will be banned . Another is when assembled , convergence between the LCD panel does not close the border with the cause slight light leakage. But in general it is difficult to see out the naked eye , and only in total darkness environmental inspection to clearly see the light leakage.
What is the principle of light leakage is it ? We mentioned earlier , is due to problems caused by convergence , where the allowed range , is a normal phenomenon , but does not affect the life of the TV leaked , response time, brightness and other parameters. Countries have enacted regulations under the black case, leaked ≤ 4cd / standards.
We buy products TFT LCD Display television, a major concern dead pixels, bright spots , dark spots, light leakage and other factors, while the red , green and blue are the three basic color television , which is the main measure of television color parameters, we tested when the LCD TV is mainly used red, green, blue, white , and black colors to examine the quality of the product
LCD TV leaked the main reason there are two , the first is the question of the panel, when the panel is not good quality, or means of transport accidents , resulting in curved panels , so there will be a serious light leakage problem , if it is checked out at the factory in this case, the factory will be banned . Another is when assembled , convergence between the LCD panel does not close the border with the cause slight light leakage. But in general it is difficult to see out the naked eye , and only in total darkness environmental inspection to clearly see the light leakage.
What is the principle of light leakage is it ? We mentioned earlier , is due to problems caused by convergence , where the allowed range , is a normal phenomenon , but does not affect the life of the TV leaked , response time, brightness and other parameters. Countries have enacted regulations under the black case, leaked ≤ 4cd / standards.
We buy products TFT LCD Display television, a major concern dead pixels, bright spots , dark spots, light leakage and other factors, while the red , green and blue are the three basic color television , which is the main measure of television color parameters, we tested when the LCD TV is mainly used red, green, blue, white , and black colors to examine the quality of the product
2013年11月21日星期四
Display a black screen how to solve
We often monitor the forums or other network in the way users see release on the "display a black screen" posts, which relate to the vast majority of mainstream brands currently on the market display products, the model in particular is abundant. So what are the factors which make the LCD screen is blank it?
Solve Step one: now most LCD monitors, especially the large-size LCD monitors are equipped with D-Sub and DVI-D interface, and some models even added more interface types, so when you reconnect LCD monitors, LCD monitors The IC chip is sometimes not automatically recognized signal source. Some users in the use of D-Sub interface, do not restart the operating system, the signal input interface directly replace DVI-D, even though LCD IC circuit have the automatic signal search function of the input source, but sometimes the chip is still in the switch enough "smart", search no input signal, then we need to adjust it manually. When the input signal through the DVI-D interface inputs, while the LCD monitor IC chip will input source selection in D-Sub interface, the screen of course can not reveal any information on the screen, thus showing all black, which is also known a lot of friends as "black." At this point, we press the "Switching input source" button (usually the SOURCE or INPUT button), so that the IC chip re-selection.
Some LCD monitors and no dedicated button to switch the input source, but they will in the OSD menu provide this functionality. When you select the correct input interface, the display will show the normal screen.
Step two solutions: Some users reflect their lcm module monitor does not have a black screen phenomenon, but intermittent black screen, sometimes black high frequency. This problem also has graphics and other host hardware problems, but do not rush to it that the host hardware. First we need to carry out a preliminary assessment of the fault, do not do any checking in the case, the failure is due to the liquid crystal display or other host device. We recommend consumers the best replacement of a normal host SPIDERS display, if the display does not fail, it indicates that the previous host fails; If the monitor still has the above phenomenon, it may be a problem with the display itself.
Solve Step Three: There are some users reflect themselves in the process of playing the game, the LCD display will suddenly appear blank screen. Most of the reasons for this phenomenon, there are two: the first one is referred to in the previous case, graphics and other host hardware part is damaged; Another possibility is the game and the operating system or the graphics card driver produced a conflicts. Although the game program and the operating system, graphics card driver produces relatively small chance, but this is sometimes still occur. Previous detection methods and time are identical, both the first determine whether the malfunction of the graphic lcd display module, and then one by one starting from the host start address.
If the test result is indeed the final LCD problem, then it should go to the respective brand service center for maintenance and inspection.
Solve Step one: now most LCD monitors, especially the large-size LCD monitors are equipped with D-Sub and DVI-D interface, and some models even added more interface types, so when you reconnect LCD monitors, LCD monitors The IC chip is sometimes not automatically recognized signal source. Some users in the use of D-Sub interface, do not restart the operating system, the signal input interface directly replace DVI-D, even though LCD IC circuit have the automatic signal search function of the input source, but sometimes the chip is still in the switch enough "smart", search no input signal, then we need to adjust it manually. When the input signal through the DVI-D interface inputs, while the LCD monitor IC chip will input source selection in D-Sub interface, the screen of course can not reveal any information on the screen, thus showing all black, which is also known a lot of friends as "black." At this point, we press the "Switching input source" button (usually the SOURCE or INPUT button), so that the IC chip re-selection.
Some LCD monitors and no dedicated button to switch the input source, but they will in the OSD menu provide this functionality. When you select the correct input interface, the display will show the normal screen.
Step two solutions: Some users reflect their lcm module monitor does not have a black screen phenomenon, but intermittent black screen, sometimes black high frequency. This problem also has graphics and other host hardware problems, but do not rush to it that the host hardware. First we need to carry out a preliminary assessment of the fault, do not do any checking in the case, the failure is due to the liquid crystal display or other host device. We recommend consumers the best replacement of a normal host SPIDERS display, if the display does not fail, it indicates that the previous host fails; If the monitor still has the above phenomenon, it may be a problem with the display itself.
Solve Step Three: There are some users reflect themselves in the process of playing the game, the LCD display will suddenly appear blank screen. Most of the reasons for this phenomenon, there are two: the first one is referred to in the previous case, graphics and other host hardware part is damaged; Another possibility is the game and the operating system or the graphics card driver produced a conflicts. Although the game program and the operating system, graphics card driver produces relatively small chance, but this is sometimes still occur. Previous detection methods and time are identical, both the first determine whether the malfunction of the graphic lcd display module, and then one by one starting from the host start address.
If the test result is indeed the final LCD problem, then it should go to the respective brand service center for maintenance and inspection.
How to solve the display color is not normal
Display screen compared to other products, the biggest advantage is the color is more accurate, but due to certain factors, the display will appear the phenomenon of color is not normal. Typically there will be three kinds of display color is not normal forms:
1, the display color obvious abnormalities;
2, the color of the display subjective special preference;
3, the graphics card or graphics card driver failure, and software compatibility problems.
Solve Step one: When the display is a color cast, we should first check the connection part of the liquid crystal display, such as D-Sub, DVI, or other data signal line and the display interface or an interface card is securely attached, because most of the screen bias color problems are caused by loose connections or poor contact caused.Coding System lcd module We suggest that you connect the signal on the transmission line screws.
Solve Step Two: If it is not the connection problem, we recommend everyone in the system menu of the "Color" option, see "warm", "normal", "cool", "user-defined" This four common options to see whether we choose not to correct color options. For most ordinary users, use the default "normal" mode is sufficient. If the change is more complex, the user can select the system menu "Restore Defaults (restore factory settings)" option, restore the factory settings to the monitor.
Solve Step Three: If the first two parts are completely normal, we conducted the third step of checking: Check whether the video card or driver issue. This process is also very simple: the host computer is connected to a normal display, or connect the monitor to another normal host, to see if it still will be cast. If the issue is resolved, indicating that the host computer graphics card or driver's fault; if not resolved, indicating a liquid crystal display their own problems.
If the fault monitor itself, TFT LCD Displays so basically belongs to the internal circuitry chip failure problems, then we suggest that you should be sent to monitor the official brand service center for repair detection.
1, the display color obvious abnormalities;
2, the color of the display subjective special preference;
3, the graphics card or graphics card driver failure, and software compatibility problems.
Solve Step one: When the display is a color cast, we should first check the connection part of the liquid crystal display, such as D-Sub, DVI, or other data signal line and the display interface or an interface card is securely attached, because most of the screen bias color problems are caused by loose connections or poor contact caused.Coding System lcd module We suggest that you connect the signal on the transmission line screws.
Solve Step Two: If it is not the connection problem, we recommend everyone in the system menu of the "Color" option, see "warm", "normal", "cool", "user-defined" This four common options to see whether we choose not to correct color options. For most ordinary users, use the default "normal" mode is sufficient. If the change is more complex, the user can select the system menu "Restore Defaults (restore factory settings)" option, restore the factory settings to the monitor.
Solve Step Three: If the first two parts are completely normal, we conducted the third step of checking: Check whether the video card or driver issue. This process is also very simple: the host computer is connected to a normal display, or connect the monitor to another normal host, to see if it still will be cast. If the issue is resolved, indicating that the host computer graphics card or driver's fault; if not resolved, indicating a liquid crystal display their own problems.
If the fault monitor itself, TFT LCD Displays so basically belongs to the internal circuitry chip failure problems, then we suggest that you should be sent to monitor the official brand service center for repair detection.
2013年11月5日星期二
Frame interpolation technology popular
As early as 2006, because LCD exist response time tailing phenomenon, so a lot of manufacturers in order to solve this problem through the IC chip from the start, launched a number of solutions. BenQ launched the beginning of the "plug black" technology, followed by other manufacturers also used a similar technique, although the names and details are different, but the basic principle roughly.
The beginning display manufacturers adopted Over Driving technology
In fact as early as BenQ "plug black" before the display manufacturers to use Over Driving technology, which is the principle of forcible IC chip to increase the voltage across the liquid crystal panel to accelerate the deflection of the liquid crystal molecules, which play a role in reducing the response time, However, this approach does not fundamentally eliminate tailing phenomenon, but rather due to improper control pressure produce similar white blur, and many other side effects, so the technology did not able to get a good promotion and application.
BenQ monitors used "plug black" technology
BenQ's "plug black" low temperature lcd display technology will solve dynamic picture while producing ghosting problem, to achieve this objective should take two steps, the first step is to reduce the gray response time, the second step is to eliminate the steady-state display Smooth edges of ways. Use the two screens inserted between the way black screen, will effectively solve the smear effect.
Because the LCD display of the steady-state mode (display elements, such as backlight source is always displayed after opening at a certain level, unless you turn off, during which the change because the screen does not change), while the human eye in Look dynamic picture of the brain signals are transmitted automatically do the integral luminance conditions, so even if the response time of liquid crystal displays 0ms, will still see the blur, so "black plug" technology to simulate a CRT monitor pulse display, so that you can effectively solve the afterimage phenomenon.
Now insert the calculated display manufacturers to use the form of frames
However, not every image is made of black pixels as the main display, so just insert only the black frame is clearly not enough, so now many monitors and television manufacturers calculation frame frames inserted, namely IC chip based on two picture to calculate an element, allowed to have a better transition, and its principles and objectives and about "black plug" technique similar to, but different from the inserted frames. According to the actual needs of the user can see the different parameters on the lcd graphic display manufacturers fixed the case can also post an IC chip technology for different tuning and improvement to meet user demand for more.
The beginning display manufacturers adopted Over Driving technology
In fact as early as BenQ "plug black" before the display manufacturers to use Over Driving technology, which is the principle of forcible IC chip to increase the voltage across the liquid crystal panel to accelerate the deflection of the liquid crystal molecules, which play a role in reducing the response time, However, this approach does not fundamentally eliminate tailing phenomenon, but rather due to improper control pressure produce similar white blur, and many other side effects, so the technology did not able to get a good promotion and application.
BenQ monitors used "plug black" technology
BenQ's "plug black" low temperature lcd display technology will solve dynamic picture while producing ghosting problem, to achieve this objective should take two steps, the first step is to reduce the gray response time, the second step is to eliminate the steady-state display Smooth edges of ways. Use the two screens inserted between the way black screen, will effectively solve the smear effect.
Because the LCD display of the steady-state mode (display elements, such as backlight source is always displayed after opening at a certain level, unless you turn off, during which the change because the screen does not change), while the human eye in Look dynamic picture of the brain signals are transmitted automatically do the integral luminance conditions, so even if the response time of liquid crystal displays 0ms, will still see the blur, so "black plug" technology to simulate a CRT monitor pulse display, so that you can effectively solve the afterimage phenomenon.
Now insert the calculated display manufacturers to use the form of frames
However, not every image is made of black pixels as the main display, so just insert only the black frame is clearly not enough, so now many monitors and television manufacturers calculation frame frames inserted, namely IC chip based on two picture to calculate an element, allowed to have a better transition, and its principles and objectives and about "black plug" technique similar to, but different from the inserted frames. According to the actual needs of the user can see the different parameters on the lcd graphic display manufacturers fixed the case can also post an IC chip technology for different tuning and improvement to meet user demand for more.
How to enhance the effect of IC circuit
LCD monitors have been listed for nearly 10 years, it has completely replaced the traditional CRT monitors become the absolute mainstream of the market, we hereby ZOL monitor channel also launched a "basic display Hundred Questions" series of topics, from the subtle technical point of view as we opened one of these displays basic knowledge of secrets. We know that the color monitor LCD panel is to determine the effect of the main factors, while others will need to rely on the IC circuit part, in addition to controlling the accuracy of color reproduction, the manufacturers but also for everyday consumer use of adding a new feature, what are the main aspects of the function it?
Note: This series of topics for readers are new to the display, or want to learn the basics of the user display, if you think you have fully mastered monitor all kinds of knowledge, you can skip this confidence.
In the previous article, we have introduced the color LCD panel displays that affect performance results of the key factors, in addition to the display of the IC circuit is also a very important part, its main job is to "guide" LCD panel accurately show a variety of colors, in addition to the monitor according to the actual needs of manufacturers have joined the many new features.
● Dynamic Contrast technology
Dynamic Contrast is the first to come into contact with us through the IC circuit to control one of the technologies. For the lcd module, its response time and native contrast ratio is fixed, while the principle of dynamic contrast ratio is the IC chip will detect the contents of the screen, if the screen when it is found that most of the image is black, it will automatically issue a directive Let reduce backlight brightness, so that you can greatly reduce the brightness of the screen at this time, at maximum brightness remain unchanged at this time raised to 10,000:1 contrast ratio than we normally would this ratio is called "Dynamic Contrast" . The use of LED backlighting, the dynamic contrast ratio can reach 10 million: 1 or more.
With the popularity of LED backlight technology, the market dynamic contrast ratio LCD display once again been greatly improved from the previous 10,000:1 quickly raised to 100,000: 1 or even 10 million: 1. Dynamic contrast ratio enhancement can effectively increase the screen layering, and can slow down the display in all black screen light leakage, so consumers have the role of improving quality.
But when Dynamic Contrast is not necessarily the value the higher the better, when its value has reached a certain level, the improvement of its screen is no longer as 1000:1 to 10000:1 so obvious, so its value has continued to increase in significance not, so now despite the dynamic display manufacturers introduced a contrast ratio of up 100 million: graphic lcd display module 1 models, but did not apply this feature as the biggest selling point to publicity.
Note: This series of topics for readers are new to the display, or want to learn the basics of the user display, if you think you have fully mastered monitor all kinds of knowledge, you can skip this confidence.
In the previous article, we have introduced the color LCD panel displays that affect performance results of the key factors, in addition to the display of the IC circuit is also a very important part, its main job is to "guide" LCD panel accurately show a variety of colors, in addition to the monitor according to the actual needs of manufacturers have joined the many new features.
● Dynamic Contrast technology
Dynamic Contrast is the first to come into contact with us through the IC circuit to control one of the technologies. For the lcd module, its response time and native contrast ratio is fixed, while the principle of dynamic contrast ratio is the IC chip will detect the contents of the screen, if the screen when it is found that most of the image is black, it will automatically issue a directive Let reduce backlight brightness, so that you can greatly reduce the brightness of the screen at this time, at maximum brightness remain unchanged at this time raised to 10,000:1 contrast ratio than we normally would this ratio is called "Dynamic Contrast" . The use of LED backlighting, the dynamic contrast ratio can reach 10 million: 1 or more.
With the popularity of LED backlight technology, the market dynamic contrast ratio LCD display once again been greatly improved from the previous 10,000:1 quickly raised to 100,000: 1 or even 10 million: 1. Dynamic contrast ratio enhancement can effectively increase the screen layering, and can slow down the display in all black screen light leakage, so consumers have the role of improving quality.
But when Dynamic Contrast is not necessarily the value the higher the better, when its value has reached a certain level, the improvement of its screen is no longer as 1000:1 to 10000:1 so obvious, so its value has continued to increase in significance not, so now despite the dynamic display manufacturers introduced a contrast ratio of up 100 million: graphic lcd display module 1 models, but did not apply this feature as the biggest selling point to publicity.
2013年11月4日星期一
TV light leakage
What is the light leakage ? A: The light leakage is due to structural characteristics caused by the LCD screen itself , to a certain extent is a normal phenomenon , light leakage does not affect the brightness of the TV itself , response time, life and other basic technical parameters .
National digital television receiving equipment and performance standards of the working group pointed out that Liu Quanen : Due to the different levels of the LCD screen , at different levels of light leakage , color lcd display module January 1, 2007 from the implementation of the "digital TV LCD universal norms" clearly defined, LCD TV in all black case leaked to ≤ 4cd / ㎡ standard .
We usually through red, green, blue three basic TV color TV technology to measure the parameters of the situation , based on the particularity of LCD TVs , the purchase should be from the red , green, blue , white, black 5 colors to examine the quality of the product , so that in addition to the basic parameters can understand the situation , but also to avoid you purchased the product have dead pixels, bright, dark , light leakage and other unnecessary trouble.
LCD screen light leakage disadvantages of LCD technology itself , there is no effective solution . Current relevant legislation is still very lag , temporarily unable to carry out effective LCD leaked specifications ---- because of leaked liquid crystal display also can be seen. Also, light leakage does not affect the life of LCD monitors , color, etc.TFT Display Module Technical parameters display itself , but in black or dark scenes will bring viewers uncomfortable feeling, so difficult to have a standard to measure how much light leakage will disrupt the viewing.
National digital television receiving equipment and performance standards of the working group pointed out that Liu Quanen : Due to the different levels of the LCD screen , at different levels of light leakage , color lcd display module January 1, 2007 from the implementation of the "digital TV LCD universal norms" clearly defined, LCD TV in all black case leaked to ≤ 4cd / ㎡ standard .
We usually through red, green, blue three basic TV color TV technology to measure the parameters of the situation , based on the particularity of LCD TVs , the purchase should be from the red , green, blue , white, black 5 colors to examine the quality of the product , so that in addition to the basic parameters can understand the situation , but also to avoid you purchased the product have dead pixels, bright, dark , light leakage and other unnecessary trouble.
LCD screen light leakage disadvantages of LCD technology itself , there is no effective solution . Current relevant legislation is still very lag , temporarily unable to carry out effective LCD leaked specifications ---- because of leaked liquid crystal display also can be seen. Also, light leakage does not affect the life of LCD monitors , color, etc.TFT Display Module Technical parameters display itself , but in black or dark scenes will bring viewers uncomfortable feeling, so difficult to have a standard to measure how much light leakage will disrupt the viewing.
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