Smart Park monitoring center splicing screen selection guide

Starting from "what does this wall do", give the screen number reverse, LCD and LED exclusion conditions, specification threshold, platform compatibility judgment, old standards and budget trade-off logic, and explain how the source factory direct supply affects the selection and cost.

The most expensive mistake in selecting the splicing screen of the smart park monitoring center is to regard "good-looking when leaders visit" as "easy to use on daily duty".A park monitoring center, which is mainly on duty for security, chose 0.88mm ultra-narrow stitching and small spacing LED in order to "show the effect". As a result, there was no difference in the daily round-trip payment, while the multi-picture segmentation efficiency and alarm linkage, which are most needed for duty, were ignored. On the other hand, a park that needs external reception and IOC data visualization has chosen 3.5mm stitching and low-brightness screen for the sake of the provincial budget. During the visit, the picture was shredded by black lines, and the reflective light could not be seen clearly during the day, thus greatly reducing the brand image.The first step in the selection is not to compare the parameters, but to answer "what is the main task of this wall".Only when the task is set can the technical route, screen wall size, splicing, brightness, platform compatibility and budget allocation be judged. This article is carried out in the order of "task → route → scale → specification → platform → benefit the old → quotation → supplier". Each link gives a hard judgment of "under what conditions to establish and under what conditions to exclude" and explainsLCD splicing screen China source factory direct supplyThe actual value in the selection is not as simple as "cheaper", but "whether the stitching, size and accessories can be customized according to the project requirements, and whether the spare parts and after-sales can keep up".

1. pre-determined tasks: three types of park monitoring center, three sets of selection logic

The "task composition" of the campus monitoring center determines the specification priority. The three types of tasks are not absolutely superior, but the selection must be clear who is the main task, otherwise the specifications will fight with each other.

2. the size of the screen wall: use the "window layout draft" to reverse the number of columns, not to determine the number of screens

The number of screens is not directly determined by "how big the wall is" or "how much the budget is", but by "how many readable windows need to be displayed at the same time. The starting point of the backward inference is aDraft window layout: Before buying a screen, draw how many windows are needed for each type of task, what content each window displays, and how much each window needs at what viewing distance.

THREE STEP THRUST REVERSER

The first step: set the number of windows. How many key images need to be monitored at the same time for the on-duty task? How many data modules need to be displayed on the same screen for the IOC Kanban? Does the display task need to be played on the whole screen? For example, the on-duty task needs 16 key images to be displayed on the regular wheel, while the IOC needs 3 data modules in the map area, and the display needs 1 whole screen.

Step 2: Convert the number of screens. Converted by the number of single-screen partitions. The key picture is divided into 4 parts (4 windows per screen), the general round tour is divided into 9 parts (9 windows per screen), and the map area is divided into whole screen or cross screen. Number of windows ÷ number of splits = number of candidate screens, rounded up to match the number of rows and columns (e. g. 2 × 3, 3 × 3, 3 × 4).

The third step: check readability. Use the nearest and farthest seat distances to check whether the text and images in the window are readable. If the farthest seat cannot see the license plate or text in the 9-split window, it is necessary to reduce the number of splits or increase the number of screens. If the nearest seat is too close to make the seam obvious, it is necessary to adjust the screen wall position or seam level.

3. LCD splicing screen and small pitch LED: not "who is advanced", but "who matches the task and budget"

The tangle of the park monitoring center on the technical route is usually concentrated between the LCD splicing screen and the small spacing LED. The two are not a substitution relationship, but have clear applicable boundaries and exclusion conditions.

A practical order of judgment is:First look at whether patchwork is "hard demand"-LED or 0mm optical seamless LCD can enter the candidate if the proportion of display tasks is high, the tour line passes through at a close distance, and the budget is supported;Look at the readability of close-up text.-If the nearest viewing distance is less than 2 meters and the IOC text billboard is dominated, the ultra-narrow LCD(0.88mm/1.8mm) is usually more secure in terms of pixel density and comfort;Last than the total price of the complete system.-- It is not the unit price of the screen, but the total cost of heat dissipation and maintenance of the screen processor structure that "achieves the same picture effect.

4. key specifications: patchwork, resolution, brightness, consistency, item by item "enough" threshold

Patchwork: according to the "recent viewing distance x content type" judgment, not the smaller the better

The patchwork judgment of the park monitoring center can refer to the viewing distance logic prevailing in the industry:When the recent viewing distance is less than 2 meters and the content contains dense text or cross-screen maps, the seam premium of 0.88mm or 1.8mm has a real visual return. Recently, when the viewing distance is more than 3 meters and the video rounds and monitoring images are the main ones, the 3.5mm seam has been difficult to detect in the dynamic images, the overpaid screen cost of 0.88mm (usually about 40% or more higher than 3.5mm) is more "parameter insurance" than visible picture quality improvement.

IOC Kanban is a highly stitched sensitive content unique to the park: road lines, area boundaries, and continuous lines of trend graphs on the map will be cut off at the stitches, and operators need to "brain repair" connections. If the IOC kanban is the main task and the seats are close, the seam should be inclined to 1.8mm or less. If the IOC kanban is only an auxiliary screen carousel, 3.5mm can be established.

Resolution: 1080P is established in most on-duty scenes, and 4K is worth "close-range text"

The single-screen resolution selection of the park monitoring center does not require blind 4K. 1080P is fully established in scenes with a viewing distance of more than 3 meters and mainly video and surveillance rounds. The value of 4K is mainly reflected inClosest view distance less than 2.5 meters, content with dense text or high-precision IOC chartsThe scene. If the signal source itself is a 1080P camera, the advantages of 4K screen cannot be realized-the screen resolution is the upper limit, and the signal source is the actual image quality.

Brightness: 500cd/m is the indoor baseline, the key is "low brightness adjustment" and "night gray scale"

The ambient light of the campus monitoring center is usually controllable, and 500cd/m² is a common indoor baseline in the industry. Selection should not only focus on the highest brightness, but to verifyLow bright performance of punctuality at night value: Whether the screen can smoothly drop to a lower brightness without color cast or loss of dark details; Whether the light background of the IOC Kanban is still comfortable in low light. If the monitoring center is by the window or the ambient light is strong during the day, 700cd/m² can be used as an enhancement option, but the low light adjustment capability should also be verified.

Consistency: the whole wall color difference and brightness uniformity, more than single screen parameters affect the perception

The look and feel of the splicing wall does not depend on the peak parameters of a certain screen, but on the consistency between the screen and the screen. The supplier shall be required to provide the selectionMeasured brightness uniformity of the whole wall after lighting(common industry threshold ≥ 90%), and the color recolor process after replacing the unit. The consistency of the panel source (same batch, same grade) and the factory screen-by-screen color calibration are the basis for ensuring the consistency of the whole wall.

5. platform compatibility: IOC Kanban takes what link to decide whether to allocate additional decoding resources

The signals of the campus monitoring center usually come from three systems: video monitoring platform (security), IOC/IBMS platform (operation data), and business system (access control, parking, energy consumption). Three kinds of signal on the wall link is different, the display resource occupied is also different.

The most common misjudgment on the wall of the IOC kanban, is to think that "large screen can display web pages" is equal to "IOC can go up the wall". In fact, the wall quality of IOC kanban depends on the rendering ability of the acquisition side (whether dynamic charts and maps can be smoothly rendered), the matching of the acquisition resolution with the screen resolution, and the performance of multi-window simultaneous acquisition. The supplier shall be required to usePark real IOC pageDo wall demos instead of using static screenshots or demo videos.

6. benefits the old and expansion: what can be retained and what must be replaced, giving the judgment criteria.

Many projects in the park are renovated or expanded on the original monitoring system, and the assessment of benefits cannot be made by "looking at the site". The following judgment criteria can be used as a starting point for evaluation.

The mixing of old and new screens is the most problematic part of the project. Screen bodies of different batches, different panel sources, and different service years may have differences in color temperature, brightness attenuation, and patchwork tolerances.The same screen lighting test must be done before mixing.: Display the same picture side by side with the old and new screens to observe whether the color difference and brightness difference are within the acceptable range; If the difference is obvious, it should be avoided by correcting the color screen by screen or adjusting the layout (using the old and new screens in different areas) instead of forcibly mixing them.

7. quotation and budget trade-off: before the total price, first than "itemized completeness"

The budget of park projects is usually tighter than that of government projects, but the risk of "winning the bid at a low price and adding items at a later stage" is not lower. The first step of quotation verification is not to compare the total price, but to confirm.Three things: Whether the quotation covers the full scope of delivery, whether the sub-items are comparable horizontally, and whether long-term costs are included.

Quotes must be itemized to account

• Screen: specific model, panel source and grade (industrial grade a or ordinary grade a), patchwork specifications, brightness and resolution. For all cases where only “55-inch splicing screen” is specified without the model number and grade, a clarification is required.
• Signal processing equipment: Decoder model and number of paths, processor input/output paths and windowing capability, number of matrix channels. Confirm "continuous processing capacity at target load" instead of just looking at the number of interfaces.
• Structure and Installation: Bracket type (wall hanging/front maintenance hydraulic/floor cabinet), load-bearing accounting, cable brand and length, wall reinforcement (if any), old equipment removal.
• Service and Delivery: Commissioning scope (whether it is "communication number" or "including IOC acquisition configuration and plan preparation"), training sessions, quality assurance starting point, spare parts list and after-sales response time limit.

Order of trade-offs when the budget is limited

If the budget cannot cover all "ideal configurations", the recommended order of trade-offs is:First, the number of screens and readability are guaranteed (the number of screens is not enough, the window is too small, and the on-duty efficiency is directly damaged), then the panel level and 7 × 24 operation capacity are guaranteed (the park monitoring needs to be stable for a long time), then the stitching is guaranteed (judging by the distance of the main task, it is not necessary to chase the narrowest), and finally the brightness and consistency are guaranteed (when the ambient light can be compensated by medium brightness and color of the later). Don't sacrifice the number of screens or panel grade for the sake of "0.1mm small patchwork"-the former is a plus for perception, while the latter is the bottom line of duty efficiency and safety.

8. supplier evaluation and acceptance: acceptance with the park's own picture, without demonstration film

Supplier evaluation cannot only look at quotations and parameter tables. The most effective way to evaluate the park project isUse the real monitoring screen and IOC kanban in the park to do actual measurement.。

Four Dimensions of Assessment

• Actual test results: The supplier is required to demonstrate the whole wall effect with the actual monitoring screen (not demonstration film) and IOC page (not static screenshot) of the park in the project site or prototype environment. Key observations: the readability of text under multi-screen segmentation, the continuity of IOC maps at the seam, and the grayscale performance in low-light environments.
• Traceability: Whether the screen model, panel source and batch are consistent with the specification and contract. The source factory shall be able to provide panel source certificates and factory inspection records.
• Delivery capabilityIs the installation team owned or outsourced? Is there a written standard in the construction specification? Is there any similar case in the installation experience of ultra-narrow joint?
• After-sales service system: Whether the spare parts list and supply cycle, response time limit and re-color service after unit replacement are included in the warranty.

Core items of the acceptance list

9. Common Misunderstandings in Selection

• Myth 1: Set the number of screens first, then think about the purpose. The number of screens should be pushed back by window layout and readability, not directly determined by wall size or budget. Draw a draft window first, then count the number of screens, and finally check the sight distance.
• Misunderstanding two: the "display effect" as "duty efficiency". 0.88mm patchwork and LED look good during the visit, but what is most needed on duty is multi-picture segmentation efficiency and alarm linkage. Different tasks have different specifications and priorities.
• Myth 3: IOC Kanban can be equipped with a collection box. The dynamic charts and maps of IOC have requirements on the rendering performance, resolution and refresh rate of the acquisition side. With the low-performance acquisition terminal, the picture seen on the large screen may be Caton or blurred.
• Myth 4: Reusing the old only depends on "it can still be bright", not "it can still be matched". The fact that the old screen can be lit does not mean that it can be mixed with the new screen. Color difference, brightness attenuation and patchwork tolerance are not tested on the same screen, and the mixed effect may be worse than full replacement.
• Myth 5: The quotation is only higher than the unit price of the screen body. Increments in campus projects are often in brackets, cables, decoder output interfaces, IOC acquisition configurations, and old equipment removal. Require itemized quotes and align them to the same template to identify the "low price trap" better than just the total price ".
• Myth 6: Think that the "source factory" must be cheap. The value of the source factory is in customization flexibility and spare parts controllability, not just unit price. The assessment should verify the factory qualification, panel source and actual case, rather than just look at the "factory direct supply" four words.

10. FAQ

XI. Conclusion