What are the four indicators of LED display for full-color LED display manufacturers?

All along, the industry of full-color LED display manufacturers began to work hard to organize the establishment of LED display industry standards, to correctly guide users to understand the performance indicators of full-color LED display, standardize the full-color LED display market. The following are the top four performance indicators of the full-color LED display?

Maximum brightness

No clear characteristic requirements are given for the important performance of "maximum brightness". Because the environment for the use of full-color LED displays varies widely, the illumination (which is what the average person calls the ambient brightness) is different. Therefore, for most complex products, the supplier provides a copy as long as the corresponding test method is specified in the standard. A list of performance data (product information), which is better than the specific performance requirements given in the standard. These are in line with international standards, but this also creates unrealistic comparisons in bidding, and users do not understand this, resulting in the “maximum brightness” required in many bids is often much higher than the actual needs. Therefore, it is recommended that in order to guide users to correctly understand the "maximum brightness" performance of the LED display, the industry needs to give a guide: in some occasions, under different illumination conditions, what is the brightness of the full-color LED display? The value can meet the requirements.

2. Primary color dominant wavelength error

Changing the primary color wavelength error index from the "primary color wavelength error" to the "primary color primary wavelength error" is more indicative of what this indicator reflects in a full-color LED display. The dominant wavelength of color is equivalent to the hue of the color observed by the human eye. It is a psychological quantity and an attribute that distinguishes colors from each other. And the performance requirements stipulated by this industry standard, literally, users can not understand that it is an indicator reflecting the color uniformity of LED display. So, is it to guide the user to understand the term first, and then understand this indicator? Or do we first understand and understand the full-color LED display from the customer's point of view, and then give us the easy-to-understand performance characteristics that users can understand?

One of the principles of product standard setting is the “performance principle”: “Whenever possible, the requirements should be expressed by performance characteristics, without design and description of the characteristics, this method leaves the greatest room for technological development”. The "primary wavelength error of the primary color" is such a design requirement. If it is replaced by "color uniformity", there is no full-color LED display that defines the wavelength. For the user, as long as you ensure that the color of the full-color LED display is uniform, and you do not have to consider what technical means you use to achieve, as much as possible to leave the technology development, this is greatly beneficial to the development of the industry. .

3. Duty cycle

Just like the "performance principle" mentioned above, "if possible, the requirements should be expressed by performance characteristics, without design and description of the characteristics, this method leaves the greatest room for technological development." We believe that "duty cycle" is purely a design technology requirement and should not be used as a performance indicator for LED display product standards; everyone knows that there is a user who cares about the display duty cycle of the display, they care The effect of the display is not the realization of our technology; why should we create such technical barriers and limit the technological development of the industry?

4. Refresh frequency

From the point of view of measurement methods, it seems to ignore the problems that users really care about. It also does not take into account the driver ICs, drive circuits and methods used by various full-color LED display manufacturers, which makes testing difficult. For example, the full color screen bidding of the Shenzhen Stadium, in the expert sample test, the test of this indicator brings many problems. The “refresh frequency” frame shows the reciprocal of the required time. The full-color LED display is used as a light source, which is the blinking frequency of the light source. We can directly test the flashing frequency of the full-color LED display with an instrument similar to the “light-sensing frequency meter” to reflect this indicator. We have done this test using an oscilloscope to measure the LED drive current waveform of any color to determine the "refresh frequency", measured 200Hz in the white field; in the low gray level such as 3 gray scale, the measured frequency is up to More than ten k Hz, and measured with PR-650 spectrometer; whether in the white field, or in the gray level of 200, 100, 50, the measured source flashing frequency is 200 Hz.

The above points are only a simple description of the characteristics of several full-color LED displays, as well as the "working life", "average time between failures" encountered in many bidding, etc. No test method can be used in It is confirmed in a short time whether the LED display meets the requirements of stability, reliability or longevity; these requirements should not be specified. The producer can make a guarantee, but it cannot replace the requirement. It is a business concept, a contract concept, not a technical concept. The industry should have a clear statement about this, which will be very beneficial to users, producers and the entire industry.

For how to guide users to correctly understand the product of a complex system such as full-color LED display, it is still necessary for the industry association to engage in a full-color LED display technology forum. It is more practical to analyze this product from the user's point of view and guide the user correctly. Understand the full color LED display.

Customers order full color LED display process:

1. Determine the approximate size (length and height) of the LED display you are purchasing. The LED display is not a single large screen, but is made up of small LED display unit modules. Therefore, the LED display does not have a specific size, but is customized according to customer needs.

2. Select the appropriate LED large screen model according to the installation location and display area. If the customer is not very familiar with the model, please call our sales staff for more information.

3. If the outdoor LED large screen installation is customized, it may be necessary to submit the application, approval and other procedures to the industrial and commercial department.

4, the display manufacturer provides standard LED large screen production construction and installation quotation program.

5. The customer confirms the quotation, technical parameters, construction plan and other matters.

6, the manufacturer to develop a LED electronic screen subscription contract, the mail is sent to the customer for inspection.

7. After the display order contract is confirmed to be no problem, you can stamp the seal or mail the original to the customer.

8. After the contract is signed, the manufacturer will start to produce LED display screens.

9. After the display production is completed, after 72 hours of aging test, the packaging process begins, and Debon Logistics is sent to the customer's nearby outlets.

10. After the display arrives at the outlet, the technical engineer of the manufacturer follows the customer to pay for the delivery at the outlet and goes to the site for installation.