Método e software de detecção de defeito de ponto comum da tela de cristal líquido LCD

The number of "point defects" is one of the criteria for measuring the quality of LCD liquid crystal displays. It is essential to see how many "point defects" the LCD liquid crystal display has before purchasing. Especially for some manufacturers who have used the instrument to turn all the bright spots of the products that promise no dead pixels into dark spots, it is even more necessary to guard against them.

1. Verifique com o plano de fundo da área de trabalho

Merchants often use various gorgeous pictures to show you when displaying LCD displays, which not only look good, but also prevent you from seeing the defects on the LCD. When selecting liquid crystal displays, it is very simple to detect the three point defects of dead pixels, bright spots and dark spots. The most common method is - right-click on the desktop, select "Properties", select "Appearance" in the opened window, then select "Black" or "White" in the "Color" column, and then click " application". Under the background of all black or all white or red, green and blue on the desktop, carefully observe whether there are different color spots or bright spots on the LCD screen, if there is any point defect problem on the LCD screen. It is best to ask for another product that is completely free of such defects or point defects on the four sides of the screen before payment.

2. Detecção de software comum

É claro que, ao testar os defeitos do display de cristal líquido, leve um disquete ou disco U ou um CD-ROM e instale vários softwares comuns de detecção de display, que também podem fazer com que os defeitos apareçam rapidamente. Esses softwares comuns incluem o Nokia Monitor Test, DisplayX, Monitors Matter CheckScreen, etc., cada um com essa função.

Teste do Monitor Nokia

Nokia Monitor Test is a simple and practical monitor test software, which can easily help you find out the problems in the LCD screen, such as bright spots, dark spots, dead spots and other monitor problems. At the same time, it includes important display effects and technical parameters such as testing the linearity, focus, and color purity of the display. After starting the software, the first row of options from left to right are geometric distortion test, brightness contrast test, breathing phenomenon test and color test. The second row of options from left to right are convergence test, focus test, resolution test, water ripple test, text display test and jitter test. Among the multiple options of the software, the one that is useful for detecting the dead pixels of the display screen is the "Colors" item. In this option, five colors of white, red, green, blue and black can be output in the full screen state. , it is very convenient to check whether the display screen has dead pixels.

DisplayX

DisplayX is a display software with a size of only 48KB, no need to install, just run the main program after decompression. Click "Regular Full Test" to complete all tests, including interlace, solid color, color, convergence, geometric shape, breathing effect, 256-level gray, grayscale, contrast and other test items, right-click the mouse or press the Esc key to exit. To test the dead pixel, just select the "solid color" mode under the "regular single-item test" menu, and click the mouse to enter different solid colors such as all black, all red, all green, all white, all blue, etc., it is very convenient of finding dead pixels, bright spots and dark spots on the LCD screen.

Teste do Monitor PassMark

O PassMark MonitorTest é um software de teste de desempenho especialmente usado para testar o desempenho da tela do seu computador. Ele fornece 25 itens de teste diferentes, você pode testar a tela do seu computador de acordo com diferentes configurações e ajustes de resolução de tela, é claro, também inclui telas de tela plana LCD testáveis ​​(tela de cristal líquido), que inclui vários O teste pode detectar vários parâmetros do LCD, como cor, tempo de resposta, efeito de exibição de texto, presença ou ausência de pixels mortos, grau de ruído de vídeo e complexidade de ajuste do LCD. Se você quiser saber se a tela do seu computador está normal e com efeito de exibição, você pode tentar este software.

Monitores Matter CheckScreen

Além de testar monitores CRT, o Monitors Matter CheckScreen também é um software de teste de LCD conveniente. Ele inclui uma série de testes, que podem detectar a cor, tempo de resposta, efeito de exibição de texto de monitores LCD, se há pixels mortos, vídeo O nível de ruído e complexidade de ajuste e outros parâmetros da tela de cristal líquido.

Select "LCD Display" to detect parameters such as color, response time, text display effect, dead pixels, etc. There are 5 test items in total. Click to start the test, and press the right mouse button or ESC key to return to the main interface. Among them, Colour options (color, with three primary colors and 16.7 million color gradation images to examine color expressiveness, color uniformity, gradation expressiveness, brightness, contrast), Crosstalk (sharpness detection, to contrast strong black and white Interlaced screen detects the sharpness of LCD color edges and crosstalk phenomenon), Smearing (response time detection), Pixel Check (pixel detection, that is, to detect whether there are dead pixels and bright spots).