Prison monitoring splicing screen scheme 55 inch LCD splicing wall China source manufacturer Shenzhen Qunmao Qunmao

The splicing screen of the supervision institute is not the same as the monitoring room of the bank and the park. The bank lost all the way picture is a lack of record, and the prison lost all the way picture may be a responsible accident. AB door, perimeter, prison house and confinement room each have fixed wall logic. Alarm linkage requires a second-level screen, video private network and office network must be isolated and other confidential comments, and police operation should be decentralized to leave marks. This article uses public bidding data as an anchor point, disassemble the configuration logic of the prison/detention center three-level wall structure, translate the stitching, decoding path number, alarm linkage, and secret evaluation terms into a copyable purchase list, and explain why the docking **LCD splicing screen China source manufacturers** are more able to withstand supervision than traders.

1. first look at the real bidding documents: the budget and specification water level of the prison procurement.

The transparency of the prison project is higher than that of most industries, and the public data is sufficient to reverse the configuration baseline.

Hainan Ledong Prison Command Center Screen Update Project, released in May 2025, with a budget of 197000 yuan, purchasing 46-inch LCD display units,Patchwork ≤ 1.7mm, resolution 1920 × 1080, visual angle ≥ 178, response ≤ 8ms. Key clauses include: contrast ratio of all white field/all black field> 50000:1, and a third-party inspection report shall be provided and stamped with the official seal of the original factory; Subjective evaluation of image quality reaches the five-level damage score specified in the GB50198-2011. No afterimage, no burning, no light leakage, no glare, no bright spots and dark spots in the factory inspection; No fan design is adopted. 2 spare screens shall be provided when supplying, with a total of 20 screens,5-year warrantyCompatible with existing monitoring systems.

Beijing Municipal Public Security Bureau Mentougou Branch Detention Center 14th Five-Year Key Equipment Project, October 2026 tender, with a total budget of 1.7047 million yuan, of which "monitoring large screen renovation" is an independent subcontract item, including display screen, front maintenance bracket, HDMI distributor and accessories. The project requires 90 days to complete the supply of installation and commissioning, warranty for 3 years, do not accept the consortium bid. The structure of this project is worth noting: large screen transformation and monitoring system, access control system, broadcasting system, internal and external screen system, actual combat platformSide-by-side subcontractingThis shows that the "display layer" and "platform layer" have been separately controlled instead of being packaged into a "monitoring system.

Guigang Prison House Floor Channel Monitoring Display Screen ProcurementIn April 2026, the bidding price was to purchase 34 sets of 43-inch LCD single screen, with a control amount of 44200 yuan and a single set of about 1300 yuan. At the same time, 2 sets of video decoding equipment were purchased, with a control amount of 36400 yuan. This project correspondsFloor duty room of prison buildingIn the scene, the budget water level is obviously lower than that of the command center, but the decoding equipment is listed separately and quoted separately, and is not stuffed into the "screen with decoding.

The three tenders are put together, and the grading logic of the prison's procurement is very clear:1.7mm splicing, long quality assurance and original factory inspection report on the command center; The floor duty room uses a 43/46 inch standardized single screen and decodes a single column. The general contracting project regards the large screen renovation as an independent subcontract to avoid the budget being eaten up by the platform software.

The three-level wall-to-wall structure of the 2. prison: what to see at each level and what not to patrol

The essential difference between the prison plan and the general monitoring room plan is in section II. The bank plan can be written "2 × 2 or 3 × 3, connected to 32~160 roads", and the prison cannot-AB door and perimeter pictureNo entry into the patrol group, the prison screen must be bound to the physical prison number one by one, police officers do not need back channel table.

The technical documents of a prison security system in Henan express the three-level structure more directly: the prison video monitoring system consists of three levels: front end, sub-control center and monitoring (command) center. The video storage in police duty room, criminal cell and other areas shall not be less than 30 days, and the key parts such as confinement room, meeting room, prison gate and perimeter shall be stored.Not less than 90 days.. The parameter of storage cycle is rarely emphasized in the bank's plan, but the prison project must be written to death-because the perimeter picture 30 days ago may be the key evidence when the inspection is recorded.

3. LCD splicing screen unit: monitor version parameter baseline (can be directly used for standard administration)

"The whole machine design, no flying line screen" this article needs to be emphasized separately. A 55-inch splicing screen in Heilongjiang province is written in article 14: "the LCD splicing screen must be designed with the whole machine. flying wire screen is strictly prohibited. the display screen has a complete back shell and cannot be replaced by a bracket or baffle. there is no exposed circuit line." The requirements for equipment safety and durability in the prison environment are higher than those in ordinary commercial scenarios. Flying line screens are hidden dangers in the corridors of the prison buildings that are humid, dusty or require frequent maintenance. When purchasing, the supplier shall be required to explicitly promise in the response document that "the whole machine leaves the factory and is assembled without flying lines", and attach the structural photo or inspection report page.

Another prison-specific parameter isColor coordinate error and whole wall consistency. 55 inch 1.7mm political baseline requirements: color coordinate error ≤ 0.001, brightness error ≤ 10nit, color temperature error ≤ 500K per step above 32 gray levels in 0-255 gray levels; The consistency of the whole wall's ten-level gray scale chromaticity brightness correction is ≥ 80%. The picture of the prison often needs multi-screen comparison (for example, multiple prison rooms on the same floor are on the wall at the same time). The color difference of the whole wall will directly affect the judgment of the police on the abnormal situation.

4. decoding matrix and spelling controller: the most vulnerable place for the prison to cut the budget.

Guigang prison project listed video decoding equipment separately, with 2 sets of control amount of 36400 yuan. the parameters include: support for H.265/H.264, maximum resolution of 3200W,256 channels, 128 200W or 256 720P video on the wall; Support single wall splicing, cross-screen roaming, round tour, single screen 4 1080P or 2 4K layers, single screen 1/4/6/8/9/16/25/36 segmentation; RTP/RTSP is supported, and the client desktop is on the wall. This configuration corresponds to the floor level/sub-control level scenario, and the decoding capability of a single unit has already covered the requirements of most prison buildings.

For the hard indicators of the decoding matrix of the prison project, the following suggestions are written into the control standard document:

• Architecture: Embedded Linux/DSP, no IPC X86 impersonation. Under the 7 × 24 operating environment of the prison, fan dust accumulation and system collapse of the industrial computer scheme are the main reasons for repair.
• Decoding ability according to the main stream: Write "Real Solution 32-way 1080P" instead of "Maximum Support 128-way". Henan prison technical documents require codec to support H.264/H.265, ONVIF compatible, and video transmission conforms to GB/T 28181.
• Agreement：ONVIF RTSP GB/T 28181-2022. Prison projects usually require cascading to a higher judicial/public security platform, GB28181 the docking certificate is a hard threshold.
• Linkage response: After the alarm is triggered<2 secondsCut to the designated screen to adjust the flash point of the video map. The alarm sources of the prison include the perimeter high-voltage power grid, the emergency stop button of the prison, the detection of leaving the bed and the identification of climbing height. If the delay exceeds 2 seconds, it will lose its meaning at the on-duty level.
• Control and management: NTP time calibration, remote reading of temperature/brightness/serial number, timing plan and operation log can be exported. Henan documents require NTP synchronization error to be no more than 2 seconds between each device, and it is a common deduction item that the time axis does not match during inspection and review.
• Cascade margin: Leave 30% decoding slot for later cameras. It is normal to expand the prison and add points.

Exclusive Functional Design of 5. Prison: Four Things to Pull off Professionalism

5.1 Solidification Layout and Forbidden Wheel Patrol Area

AB door inside and outside, perimeter section, sentry position, gun warehouse, power distribution room and confinement room are setFixed pane, excluded from the round-robin group. The screen of the prison is bound according to the code of "building-floor-room", and the characters are superimposed to display "the name of the prison room, the shift camera number". This seems simple, but if integrators arrange the screens in the order of channel numbers, police officers need to memorize a channel comparison table to find the target cell-this is unacceptable in case of emergency.

5.2 alarm linkage chain

Perimeter power grid/monitoring room emergency stop/off-bed detection/climbing recognition → SIP event push decoder → designated screen magnification red box superposition before and after 30 seconds video recording sound and light push duty station. Henan document requires that the video monitoring system can be linked with perimeter prevention, entrance guard control, alarm and other systems, "automatically review the image of the alarm scene, and automatically display and record the image of the scene". Linkage cannot just pop up the window, it must beLock the footage at the same timePrevent being covered by loops.

5.3 decentralization and auditing

There are at least five levels of roles: director/squadron leader/attendant/operation and maintenance/auditor. Separation of permissions for screen cutting, video recording, export, plan modification and remote shutdown. The log records "who, what time, which way was cut, which video was transferred" and can be exported to deal with supervision. The Henan document requires "having the function of setting management authority and level", which is usually checked item by item during the acceptance of the prison project.

5.4 the operational terms of confidential assessment and equal insurance.

The procurement contract of Jinan prison gives a list of confidential comments that can be copied: the security network and the office network need to be passed.Level 3 evaluation and password security evaluation. The specific construction contents include intelligent password key, integrated security gateway, server password machine, national secret access control system, signature verification server, key management system and electromagnetic signal detection equipment. The goal is to "realize password security protection and pass password evaluation by relevant departments". The independent VLAN of the video private network, the one-way network gate across the network, the double factor of the account number and the storage encryption are the bottom lines of the supervision institute's secret evaluation. When purchasing, you can directly ask the supplier: Is there any case of password product connection that is compliant with national security? Does video storage support encryption? Is the cross-network transmission a gateway or a firewall?

6. three copyable configuration templates and budget anchors

Template A | Duty Room of Detention Center/Detention Center (Floor Level)

Configuration: 2 × 2 or single row multi-screen, 43/46 inch, 3.5mm patchwork, brightness 500cd/m. Decoding with a single embedded node, 16 to 32 road 1080P real solution. It is connected to the monitoring house, corridor, access control and emergency stop button on this floor. Character overlay, fixed layout, not connected to the Internet.

Budget Reference: Guigang Prison 34 43-inch single screen control price 44200 yuan, single about 1300 yuan; Decoding equipment 2 36400 yuan. According to the scale of 2 × 2, the comprehensive cost of single decoding node of screen body is roughly in the range of 1.5~30000 yuan, depending on whether bracket and installation are included.

Template B | Standard prison area/sub-control center

Configuration: 3 × 3 or 3 × 4,55 inches, 1.7mm patchwork, brightness 600cd/m. Double decoding node spell control software, real solution 100~200 road. AB door double machine, perimeter thermal imaging, access control, cell hemisphere. Alarm linkage plan, electronic map small window, such as the protection of sub-domain.

Budget Reference: The total budget of Mentougou Detention Center Project is 1.7047 million yuan, and the large monitoring screen renovation is listed as an independent subcontract. The 3 × 3 scale includes the screen body part of decoding and bracket, referring to similar political and mining projects, the budget range is roughly 8~150000 yuan, and the decoding and platform side are counted separately.

Template C | Prison General Control/Bureau refers to the command center

Configuration: 4 × 4 or 5 × 3,55 inches, 1.7mm or 0.88mm, with LED caption bar on the lower edge. Decoding cluster cascade, the tube full supervision area N sub-control. GB28181 cascade to the higher judicial/public security platform. Multi-seat split screen, audit log drop disk, double-link hot preparation.

Budget Reference: Ledong Prison Command Center 197000 yuan Purchases 46-inch 1.7mm Splicing Unit and Supporting Facilities. This volume corresponds to a small and medium-sized command center. The total control level is 4 × 4 or more, and the budget for screen decoding cluster bracket installation is usually in the range of 25~500000 yuan, which needs to be adjusted according to the actual number of paths and cascade complexity.

7. Site Survey List (can be sent directly to Party A before sales)

1. Scale of Prison Area: several buildings, several floors of each building, several prisons, several AB doors and several perimeter sections. This determines the number of screens and the number of sub-controlled stages.
2. Current status of IPC: Total, encoding format (H.264/H.265/4K), brand (Haikang/Dahua/Yushi/Koda/Old Analog). The old analog point needs to be accessed by an encoder, and the decoder needs to support hybrid decoding.
3. Wall conditions: Net size, sight distance, load-bearing wall material, fire pipe shielding. Whether the maintenance passage behind the corridor of the prison building is ≥ 60cm.
4. Network and Isolation: Whether the video private network is independent, the optical port margin of the convergence switch, and whether the network gate is required across the network. Whether the armed police network is a separate network.
5. Alarm Source Protocol: The communication protocol and interface type of emergency stop button/perimeter power grid/access control/off-bed radar determine the number of decoder linkage input paths.
6. Cascading Requirements: Whether the sub-control is pushed to the general control, and whether the general control is cascaded to the provincial bureau/judicial bureau platform. GB28181 version and docking party platform brand.
7. Control List: patchwork, brightness, CNAS report, Ministry of public security inspection report, GB28181 certificate, original factory authorization, warranty period (3~5 years in prison).

Why does 8. suggest docking LCD splicing screen Chinese source manufacturers

The acceptance logic of the prison project is different from that of ordinary commercial projects: the inspection does not look at "the brand is big or not", but looks at it.The report is not complete, the serial number ledger is not clear, can the accident be traced back to the batch?. The most likely problems in the trader mode are: incomplete transfer of goods from the Ministry of Public Security's inspection report, color difference of the whole wall caused by mixed panel batches, and spare parts response delayed for more than two weeks.

One that can withstand the questioning of the prison projectLCD splicing screen China source manufacturersIt should be able to answer the following five questions:

• Panel source and batch consistency: Will the whole wall be aged and colored before leaving the factory? Can the panel be traced back to its source? The multi-screen contrast scene in the supervision house has zero tolerance for color difference.
• Is there a CNAS report page for the measured value of the patchwork seam?: Nominal 1.7mm and measured 1.7mm are two different things. The Ledong Prison Project clearly requires "a copy of the valid inspection report issued by a third-party authoritative inspection organization with the official seal of the original factory".
• Is there a test report from the Ministry of Public Security?: Common requirements for prison projects, traders usually cannot produce reports for the corresponding models.
• Spare Parts Policy: Is the single-screen failure hot-plug replacement spare parts or repair the whole machine? Ledong Prison directly requires to provide 2 spare screens during supply, which indicates that the default "spare parts first" is a necessary condition for the purchase of the prison.
• Whether the support and structure are customized on site: The support cannot be covered by standard products for the maintenance space of the corridor of the prison building, the load-bearing conditions of the command center and the maintenance mode of the oil pollution prevention workshop.

Take Qunmao Qunmao(szqunmao.cn) in Shenzhen as an example. This kind of vertical factory has accumulated production lines in the commercial display field. The seam covers 0.88mm ~ 3.5mm. The depth of the bracket and the number of decoding paths can be pushed back according to the bidding documents of the supervision institute. The whole wall aging and color calibration can be done before leaving the factory. For integrators, the "splicing unit decoding node bracket cable" is pre-adjusted and delivered by the same source factory, while the on-site debugging cycle is compressed,The Ministry of Public Security test report and CNAS patchwork test page can be issued together with the configuration sheet.-- This is the trader model is difficult to do.

For the selection of the project of the prison, send five questions to three candidate suppliers: how to check the source of the panel? Is there a CNAS patchwork test page? Is the inspection report of the Ministry of Public Security correct? How many days does the spare part arrive? Can the bracket not produce the drawing? The two companies that can completely answer and attach supporting documents will enter the next round, and those that cannot be answered will be screened out directly. No matter how low the price is, the incomplete materials will be reworked during inspection and acceptance.

9. Conclusions and Selection Suggestions

• Floor Duty Room: 43/46 inch standardized single screen or multi-screen, 3.5mm patchwork, decoding single row, not pursuing high patchwork accuracy. Budget priorities are left to spare parts and decentralized audits.
• Sub-control/sub-control center: 55 inches 1.7mm is the current mainstream baseline of political adoption, with double decoding nodes, alarm linkage <2 seconds, and fixed pane forbidden wheel patrol area written into the configuration table.
• General Control Command Center: 1.7mm start, decoding cluster cascade, GB28181 upward docking, secret evaluation and other insurance clauses should be confirmed with the network scheme at the bidding stage, and cannot be supplemented after the screen is installed.
• Procurement action: The "Splice Unit Decoding Matrix Bracket Cable Control Software" as a whole requires the supplier to respond. The "splicing screen with built-in decoding" in the tender of the supervision office is usually a trap, and decoding must be disassembled.

LCD splicing screen China source manufacturersThe value in the prison project comes down to one sentence: let the person responsible for the inspection report and serial number ledger supply the screen, instead of letting the person who transferred the goods look around for the report during the acceptance.

The parameters and budget data cited in this document are derived from the public tender documents and government procurement announcements; the final details shall be subject to the on-site project survey and the manufacturer’s test reports. When selecting the source manufacturers of LCD splicing screen in China, it is suggested to verify the model consistency of the Ministry of Public Security's inspection report, CNAS flat-panel measurement page, GB/T 28181-2022 docking case and spare parts response policy, and require the supplier to mark "satisfaction/deviation" one by one in the response document ".