My 22 inch LED TV LCD screen is broken. Take down my previous broken laptop display, and then use the TV driver to match the laptop
Author:Chen Yanxue Time:2021-10-13 17:58 Browse(307)
The LCD TV screen is damaged and can be replaced. However, it needs to be replaced by the TV manufacturer, mainly because the screen size, specification, model of the LCD TV, whether the backlight uses LED, or the number of lamps and so on are not the same. Generally, there is no ready-made screen to replace in the daily home appliance maintenance department.
If the LCD TV screen is damaged, it can be replaced.
however, it needs to be replaced by the TV manufacturer.
the main reason is that the screen size, specification and model of the LCD TV, as well as whether the backlight uses LED, or the number of lamps and so on are different, In general, there is no ready-made screen to replace in the daily home appliance maintenance department.

My 22 inch LED TV LCD screen is broken. Take down my previous broken laptop display, and then use the TV driver to match the laptop


look at the current TV market.
LCD TV sets emerge in endlessly, and the replacement is very fast. Manufacturers prefer to produce more TV sets (because they are produced in assembly line) rather than give you a new screen, This is mainly because the labor cost is too expensive.
even if the LCD screen is available.
the maintenance cost must be more expensive.
it seems that it is better to buy another LCD TV directly.
LED is the English abbreviation of light emitting diode.

LED applications can be divided into two categories: one is led single tube applications.
including backlight LED, infrared LED, etc; At present, there is still a certain gap between China and the world in the manufacturing of LED basic materials, but as far as LED display is concerned, China's design and production technology level is basically synchronized with the international level.

LED display is a display device composed of light-emitting diode arrays.
it adopts low-voltage scanning drive.
it has the following advantages: low power consumption, long service life, low cost The original text of LCD is liquid crystal display.
it is composed of the first letter of each word, which is often called "liquid crystal flat panel display" or "liquid crystal display" in Chinese.




it has the characteristics of high brightness, few faults, large viewing angle and long viewing distanceIts working principle is to make use of the physical properties of liquid crystal: the arrangement becomes orderly when power is on.
it makes light easy to pass through; The advantages of LCD are: compared with CRT display.
the advantages of LCD mainly include zero radiation, low power consumption, small heat dissipation, small volume, accurate image restoration, sharp character display, etc.
choose and buy LCD.
there are several basic indicators: high brightness: the higher the brightness value, the higher the brightness value, The brightness unit is CD / m2.
that is, candlelight per square meter.
the brightness value of low-level LCD is as low as 150cd / m2, while that of high-level display is as high as 250cd / m2.
high contrast: the higher the contrast is, the more bright and saturated the color will be, and the more three-dimensional it will be.
on the contrary.
the contrast is low, and the color will be poor, The image will also become flat.
the contrast value is quite different.
it can be as low as 100:1, or as high as 600:1, or even higher.
wide visual range: in short,
refers to the clear range that can be seen in front of the screen.
the larger the visual range, the easier it will be; The smaller the value is, the clearer the picture will be if the viewer changes the viewing position a little.
the algorithm of visual range is from the middle of the picture.
the clear angle range of the picture is from the top, bottom, left and right directions.
the larger the value is.
the wider the range is naturally, but the range of the four directions is not necessarily symmetrical.
some manufacturers will add the angle values on both sides and mark them as horizontal: 160 °; Vertical: 160 °; It may also be marked separately as left / right: ± 80 °; Up / down: ± 80?.
0Fast signal response time: signal response time refers to the time that the system receives instructions from the keyboard or mouse, which is calculated and processed by the CPU, and reacts to the display.
signal response is very important for animation and mouse movement.
generally speaking, this phenomenon only occurs on LCD, The faster the signal response time is, the more convenient the task processing is.
one of the methods of observation is to move the mouse quickly (that is, the mouse keeps moving down to indicate to the system.
the system keeps responding to the signal to the display). On a low-level LCD display, the cursor will disappear when it moves quickly until the mouse is positioned, No longer move after a short period of time, will appear again; When moving at normal speed, you can also see the trace of mouse movement clearly.
while the response time of ve500's ultra fast signal is as fast as 16ms.
it makes the cursor move without time difference, and the moving process is clear and easy to see,






the characteristics of LED.

super bright materials should be used for LED.
brightness height (uhB) refers to the LED whose luminous intensity reaches or exceeds 100mcd, also known as candela (CD) level led.
the development of high brightness a1gainp and inganled is very rapid.
it has reached the standard of conventional materials GaA1As, GaAsP, inganled In 1991, Toshiba company of Japan and HP company of the United States developed ingaa1p620nm orange ultra-high brightness LED.
in 1992, ingaa1p590nm yellow ultra-high brightness LED was put into practice.
in order to improve the performance of ingaa1p620nm orange ultra-high brightness LED, we need to improve the reliability of ingaa1p590nm yellow ultra-high brightness LEDIn the same year,
Toshiba company developed ingaa1p573nm yellow green ultra-high brightness LED, and the normal light intensity reached 2CD.
in 1994, Japan Nippon Yat Sen company developed ingan450nm blue (green) ultra-high brightness LED.
so far,
the three primary colors of red, green, blue, orange and yellow LED required for color display have reached candela level luminous intensity, realizing ultra-high brightness and full color, It makes the outdoor full-color display of LED become a reality.
the luminous brightness has been higher than 1000mcd.
it can meet the needs of outdoor all-weather and full-color display. With LED color large screen, it can show the sky and the ocean, and realize three-dimensional animation.
the new generation of red and green Blue ultra-high brightness LED has achieved unprecedented performance.

at present, the outdoor screen pixel is composed of several single LED tubes with red / Green / blue primary colors.
the commonly used finished products are pixel tube and pixel module structures.
the pixel size is mostly 12-26mm.
the pixel composition is: monochrome with 2R / 3R / 4R, pseudo color with 1r2yg / 1r3yg / 1r4yg The true color is mainly composed of 2R1G1B and other components.

design principle of outdoor screen system scheme (the content is not described)
△ structural design principle
△ brightness and color matching basis
△ reliability design principle
△ safety design principle
△ easy management and operability design principle
installation mode of screen body
△ wall hanging type: that is, the screen is back against the wall.
and fixed on the wall.
>This is a common way.
and it is easy to realize.

△ sitting: that is, the display screen is sitting on the platform.
this way is the most easy to realize.
this way should be preferred when conditions permit.
this way of installation should be adopted
Delta mosaic: the display screen is embedded in a wall frame.
this method is rare.
if the concave depth of the wall is not enough, The maintainability should be considered.

△ side hanging type: the display screen is stressed on both sides.
it is hung between two buildings or columns.
this method is often used to hang the screen in open space.
the two columns are built according to the hanging requirements of the screen.

Dacheng display control system consists of acquisition / transmission subsystem and reception / gray processing subsystem.
its front end is composed of two parts It is the VGA feature output interface of the computer or the multimedia card with digital component output. The transmission is realized by the super five twisted pair, and the back end is the display unit of the electronic display screen.
the acquisition / transmission subsystem collects 24 bits true color signal at the frame rate of no less than 60 frames per second.
and writes it to the built-in display buffer smoothly by the way of alternate operation of double memory, Under the control of the central processing unit, the gray weight transformation is completed, The LVDS is differentially connected to the Cat-5 twisted pair channel.
the Cat-5 twisted pair realizes the connection between the acquisition / transmission subsystem and the receiving / gray processing subsystem.
completes the signal transmission.
without relay.
the maximum transmission distance can reach 300m.

gray realization description
Dacheng receiving / gray processing subsystem receives 24bits true color signals from Cat-5 twisted pair The weights are 20, 21, 22, memory 23, 24, 25, 26, 27, and each primary color has eight weight components, which are controlled by CPLD to realize 256 level gray control signal.
the anti-interference processing is carried out in the video receiving circuit, storage circuit, high-speed writing circuit, and display screen control scanning circuit.
the anti-interference processing is carried out in the video receiving circuit, storage circuit, high-speed writing circuit, and display screen control scanning circuitMoreover, it has a display refresh frequency of 150Hz, so it has strong stability and real-time performance, ensuring the true 24 bit true color effect.

the number of colors that can be produced by different combinations of 256 gray levels of red, green and blue primary colors is 256 × two hundred and fifty-six × 256=16777216 colors (i.e. 16m colors)
nonlinear γ The correction of video signal is designed to meet the luminous and electrical characteristics of TV.
it can be played on TV or monitor.
if the TV signal is not corrected, serious color distortion will occur.
therefore, the front end of the input video signal must be nonlinear γ Correction.
after correction, the chromaticity space will be significantly improved.
corresponding to the LED large screen.
the physical brightness is proportional to the gray value. If it is not corrected, it obviously can not meet the requirements of color restoration. Specifically, in the display effect, the low-level gray jump is very large, and the high-level gray is not clear.
as we all know.
the perception of light intensity by human eyes is nonlinear, When the light intensity is doubled, the enhancement felt by human eyes is more than doubled; When the light intensity is strong, the light intensity is doubled, and the enhancement felt by the human eye is less than doubled. Therefore, it is necessary to make a nonlinear transformation of the gray level, so that the time interval is small when the gray level is low, and the time interval is large when the gray level is high.
therefore, in order to ensure the complete restoration of the color of the LED large screen.
anti gamma correction must be carried out, We can clearly see that the display screen after gray correction will appear clear texture, strong sense of hierarchy, soft brightness and smooth transition between light and dark.

the technical guarantee of true color screen white balance, color deviation and color richness
white balance refers to when each primary color reaches the highest level of brightness.

the technical guarantee of true color screen white balance, color deviation and color richness is that when each primary color reaches the highest level of brightnessThe white color deviation of 6500k is a phenomenon that the brightness of LED, especially the red LED, changes with the change of temperature.
the existence of color deviation indicates that a display screen that achieves white balance in production and debugging at a specific temperature will lose balance with the change of working temperature, Or because of the uneven temperature distribution in the screen, the whole display screen will appear "painted face" phenomenon after playing for a period of time.
our company has a comprehensive solution to the problem caused by the color deviation of the true color display screen.
it can effectively ensure the color richness and consistency of the true color display screen.

intelligent monitoring and protection system
the intelligent monitoring system is composed of various sensors The monitoring system is composed of a monitoring system and a control computer.
it is used to monitor the working environment parameters of the display screen and timely control the relevant protection system to ensure that the display screen works normally and the performance parameters do not deviate greatly.
the protection system includes: heat dissipation system, water-proof system, water-proof system

the normal operation of the control software
display system.
must be supported by relevant software.
our company's software designer has created a powerful and easy-to-use software configuration system through careful preparation and combination.
in this software system.
according to the different functions of the software, We classify them into two categories: one is display control software, which mainly completes the playback and switching control of text, animation and video images; The other is content editing software, which is mainly used for creative production and graphic editing, which can constantly update and transform the display content.




LCD is also divided into stntftfd and so on
1. What is STN the two biggest differences between STN and TFT are that the performance of TFT is better than STN.
but STN saves power than TFT.


2 it means that every liquid crystal pixel is driven by a thin film transistor integrated behind the pixel, so that it can display screen information with high speed, high brightness and high contrast. It is one of the best LCD color display devices at present, and its effect is close to that of CRT display, Nowadays, TFT is the mainstream display device on laptops and desktops.
every pixel of TFT is controlled by the integrated TFT.
it is an active pixel.
therefore.
not only the speed can be greatly improved, but also the contrast and brightness can be greatly improved, and the resolution can reach a very high level.


3<
the progress of mobile phones is still going on.
in this case, people have higher requirements for LCD performance; 2) Low power consumption( 3) Be able to process active images; 4) Compact structure; Epson Co., Ltd. has carried out the commercial production of an active dot matrix lcd-d-tfd (Digital thin film diode), and has become one of the main manufacturers of digital cameras.
one of the important reasons is that low power consumption (the characteristics of d-tfd) and high image quality / high reaction speed (the characteristics of active dot matrix LCD) meet the requirements of digital cameras.
Epson Co., LtdBy applying the new technology of high image quality, low power consumption and more compact structure to this kind of d-tfd.
we have achieved the above four requirements for the next generation of mobile phones at a high level.
this kind of LCD is called "MD TFD"


4. What is the difference between TFT, STN and TFT LCD<

there are three types of displays used in mobile phones: STN mode, TFD mode and TFT mode.
among them, TFT mode has the best image quality.
most of the displays used in notebook computers are of this type.
however, although TFT has beautiful pictures,
it consumes a lot of power, so for mobile phones, Although STN has the worst image quality, it has the advantages of low power consumption and low cost.
TFD is located in the middle of TFT and STN.
although the image quality is slightly inferior to TFT.
the power consumption is less than TFT,
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