Physiotherapy instrument LCD screen working principle

The working principle of the LCD screen is to put the LCD screen in the middle of two conductive glass, so that the electric field reaction occurs between the two electrodes, and the liquid crystal molecules distort to produce electromagnetic effect phenomenon, so as to control the role of the light source projection and masking. The light and dark phenomenon is generated through the control button of the power supply, so that the display can show the effect of the image. If we install a color filter, the image will appear in color. When we want two pieces of glass to basically install a matching film, then the liquid crystal will be matched according to the direction of the groove, because the groove of the glass substrate is too high to 90 degrees, so the liquid crystal molecules will form a form of torsion, if the electric field is not installed on the glass substrate, the liquid crystal molecules will undergo a configuration transformation. The light will maintain its original direction due to the gap in the liquid crystal molecules, and be blocked by the polarizer below, the light will be absorbed and impossible to reveal, the liquid crystal panel will turn black, the liquid crystal display is based on the voltage is not available, so that the panel to achieve the display effect.

 

1, the main body is different 1, LCD screen: is a display device composed of light-emitting diode arrangement.

 

2, touch screen: It is a kind of induction LCD display device that can receive touch input signal

 

3, LCD screen: Generally speaking, LCD screen is made of touch screen and display screen pressed together.

 

4, the difference between the three: 1 touch screen is the touch screen, itself does not display the image function, is fully transparent, looks like a piece of glass; (2) The display screen (the display screen used with the touch screen, generally the LCD screen, that is, the LCD) is used to display the image, and can not feel the touch; . 1. LCD screen: Liquid crystals are placed in two parallel pieces of glass, and there are many vertical and horizontal small wires in the middle of the two pieces of glass, and the rod crystal molecules are controlled to change direction through power supply or not, and the light is refracted to produce a picture. 9. It is better to rely on ordinary LCD screens for TV and PC monitors, which do not support continuous use day and night. ID LCD screen for monitoring center, display center design? Support the continuous use of the LCD screen in 7x24 hours: In general, the LCD screen is made of the touch screen and the display screen pressed together.

 

The difference between the three: the touch screen is the touch screen, itself does not display the function of the image, is fully transparent, looks like a piece of glass; (2) The display screen (the display screen used with the touch screen, generally the LCD screen, that is, the LCD) is used to display the image, and can not feel the touch; .

 

1. LCD screen: Liquid crystals are placed in two parallel pieces of glass, and there are many vertical and horizontal small wires in the middle of the two pieces of glass, and the rod crystal molecules are controlled to change direction through power supply or not, and the light is refracted to produce a picture.

 

2, Physical therapy LCD screen

 

Rely on better, ordinary LCD screen for TV, PC monitor design does not support day and night continuous use. The ID LCD screen is designed for the monitoring center and display center to support the continuous use of the physical therapy LCD screen in 7x24 hours, and the LCD does not have to care about the refresh frequency and flicker, the LCD unit is either on or off, so the image displayed under the low refresh frequency of 40 ~ 60Hz will not be more flicker than the image displayed under 75Hz. However, the LCD unit of the LCD screen will be prone to defects. 2) Static scanning technology, using static latch scanning mode, high-power drive, fully ensure the luminous brightness.

 

3. Automatic brightness adjustment With automatic brightness adjustment function, can obtain the best playback effect in different brightness environments.

 

4. Full use of imported large-scale integrated circuits, reliability is greatly improved, easy to debug and maintenance. For a 1024×768 screen, each pixel consists of three units, one for red, one for green, and one for blue, so a total of about 2.4 million units is required (1024×768×3 = 2359296). It is difficult to ensure that all these units are intact. Most likely, some of it has been short-circuited (a "bright spot ") or broken (a" black spot "). Therefore, not so expensive display products will not have defects.