LCD splicing screen splicing panorama: 3.5/1.8/1.7/0.88/0mm how to choose

Flat-splice is the first watershed of LCD splicing screen selection, and it is also the most misunderstood parameter. Many people default that "the smaller the stitching, the better". As a result, they spent nearly twice the budget on projects with a viewing distance of more than 3 meters, and the visual difference in exchange was almost invisible. In this paper, six mainstream flat-splice specifications (8mm / 3.5mm / 1.8mm / 1.7mm / 0.88mm / 0mm) are explained clearly at one time, and a set of recoverable decision paths is given:The viewing distance sets the lower limit of stitching, the scene demand sets the upper limit of stitching, and the budget sets the final choice.. Panel source, brightness, size and other details by the various topics to undertake, this article only talk about patchwork.

1. patchwork is the first watershed

LCD splicing screen is widely used in monitoring and commanding, enterprise meetings, exhibition halls, commercial advertisements and other scenes. The width of patchwork directly determines the integrity of the picture and viewing experience, which is one of the core parameters in the selection. First understand the physical nature of patchwork:The patchwork seam is the "double-sided physical patchwork seam", that is, the sum of the black edges at the joint of the two screens, and a slight gap will be reserved between the two screens during actual installation.. The so-called 3.5mm, 1.8mm and 0.88mm refer to the bilateral patchwork value.

The common misunderstanding of selection is "the smaller the seam, the better". The smaller the seam, the higher the requirements for panel packaging accuracy and optical compensation process, and the cost increases exponentially. However, the human eye's perception of seam decays rapidly with the viewing distance-when viewing above 6 meters, the visual difference between 3.5mm and 0.88mm is almost indistinguishable. Therefore, the correct order of patchwork selection is: first set the viewing distance, then set the scene requirements, and finally close with the budget.

2. 6 kinds of patchwork specifications panoramic contrast

This is the core index of the full text, and each subsequent specification chapter is linked back to this table (viewing distance is recommended, see Chapter 4 Matching Table):

3. specification-by-specification deep resolution

3.1 8mm: low-end historical specifications, not recommended for new projects

8mm patchwork larger, visual gap obvious, simple manufacturing process, the lowest cost. Only when the budget is extremely tight and the viewing distance exceeds 6 meters, there are two practical problems: first, 8mm has no cost-effective advantage after the price of 3.5mm continues to fall; Second, mainstream panel manufacturers are gradually discontinuing 8mm panels, and there are risks in the subsequent supply of spare parts. Panel to domestic assembly-based, stability and after-sales need to focus on inspection.

3.2 3.5mm: the king of cost performance monitoring scene

3.5mm is the classic conventional splicing of LCD splicing screen, and it is also the most cost-effective basic model. The visual presence of black edges at the splicing site is moderate, and the dynamic picture shows almost no obvious separation. Core advantages: mainstream manufacturers provide this specification with sufficient supply. Panel stability has been inspected for many years and the after-sales maintenance rate is low. Moderate price, universal monitoring, conference and exhibition hall, is the best solution for projects with limited budget and stable and practical.

Applicable scenarios: residential security monitoring room, factory workshop monitoring background, property dispatching room; Park information release screen, channel advertisement screen, building lobby display; Military, government and enterprise conference room, security screen, public information display.

Size matching: 46 inches and 49 inches are the gold combination of the patchwork, with a light and thin body and a small splicing layout.

Decision Point: 3 meters above the conventional viewing distance can completely weaken the seam defects, is the mainstream standard security monitoring industry. For projects with limited budget and mainly monitoring screens, 3.5mm is the optimal solution.

3.3 1.7/1.8mm: mid-end micro-slit double male, how to choose

The difference between 1.7mm and 1.8mm is only 0.1mm, which is almost the same visually and similar in price. It belongs to the micro-seam specification at the middle end of the ultra-narrow side. The main difference between the two is the panel source and white balance performance (according to the common caliber of mainstream manufacturers, the specific specifications of the manufacturer shall prevail):

• 1.8mm mostly LG panel: The ultra-narrow side panel has good stability and low repair rate. It is the specification with the highest utilization rate of government and enterprise projects. It is suitable for general occasions such as central control room, conference room, exhibition hall, etc.
• 1.7mm mostly Samsung panelWhite balance performance is good, suitable for frequent PPT, data reports and other meeting occasions with high requirements for color restoration. In the industry experience, the 1.7mm panel has been rumored to have problems with flower screens and vertical lines and has been discontinued for a period of time. At present, the market supply has returned to normal, but this information is subject to the official instructions of the panel factory. For projects with extremely high stability requirements, 1.8mm can be given priority.

Applicable scenarios: conference room for government and enterprise units, enterprise training room, energy dispatching center, traffic secondary central control; Security monitoring, enterprise exhibition hall, exhibition display, big data display.

Size matching: 55 inches and 16:9 gold display ratio are preferred, which is suitable for the layout of most conference rooms and central control rooms.

Decision Point: 1.7mm for close-up (within 3 meters) and 1.8mm for medium-distance (3-6 meters) general occasions; The visual difference between the two is extremely small, and the choice mainly depends on the panel brand preference and stability requirements. When the budget is limited, 1.7mm is fully sufficient, with little visual difference from 0.88mm.

3.4 0.88mm: the extreme narrow edge of high-end scenes

0.88mm is the extreme narrow-side specification for conventional mass-produced LCD splicing screens. The double-sided splicing gap is only 0.88mm, and the single-sided splicing gap is as low as 0.44mm. It is almost difficult to detect by naked eyes, and there is no obvious black edge when viewed at close range. The picture integration effect is extremely strong, and the display effect can be almost equivalent to DLP, which is perfectly adapted to close-range high-definition display and fine picture presentation.

Panel: Common LG/BOE industrial panels (subject to manufacturer's specifications), brightness 500-700cd/m (industry reference value), contrast, color saturation and other parameters are subject to manufacturer's actual measurement.

Applicable scenarios: enterprise digital exhibition hall, government affairs achievement exhibition hall, public security law research and judgment center, financial trading hall, high-end report hall; Big Data Analysis Center, Command Center, Video Conference; Exhibition hall interactive large screen, immersive display space and other close-up viewing scenes.

Size matching: Mainstream 55-inch, 65-inch, large-size units reduce the number of splicing gaps.

Cost Tips: Ultra-narrow stitching requires higher liquid crystal frame packaging accuracy and optical compensation film technology, and the manufacturing cost is significantly higher than that of conventional stitching (see the cost table in Chapter 6 for relative multiples).

Decision Point: Suitable for high-end projects with sufficient budget and focus on brand image. Ordinary conference room 1.7mm can meet the demand, not 0.88mm; When the viewing distance exceeds 5 meters, the difference between patchwork and picture quality can be ignored, and money should be spent on more needed parameters.

3.5 0mm optical seamless: visual seamless, but need to be rational

0mm patchwork seam theory to achieve seamless splicing, but the actual is through a special technology "hidden" physical gap, the main technical route has two kinds:

• optical glass refraction: The surface of the splicing screen is covered with a layer of special optical glass, and the four sides are treated with inclined planes. The physical frame of the panel is hidden by the principle of light refraction without affecting the image bonding.
• LED light source compensation: Add a luminous body composed of two rows of small-pitch LEDs on the liquid crystal frame, lens package, and chip device on the side of the screen to restore the image of the frame when the image is displayed on the screen.

Core Advantages: Visually completely seamless, suitable for high-end conference rooms, exhibition halls, and command centers that require high continuity; on the basis of retaining the advantages of liquid crystal technology, it solves the perception problem of physical stitching.

Decision Point: Suitable for high-end projects with sufficient budget and high requirements for visual consistency; Clear "visual seamless" positioning when selecting models, and select suppliers with mature cases and after-sales capabilities.

4. selection of patchwork by viewing distance-core decision-making tool

4.1 viewing distance and patchwork matching table

4.2 viewing distance calculation formula (purpose to distinguish)

This formula is not used for patchwork seam selection.: The visually acceptable distance of the patchwork is determined by the third gear of the matching table in Chapter 4 (within 3 meters/3-6 meters/6 meters or more). The formula is only used to determine the screen size. It is a common mistake to mix the two-if you use the minimum viewing distance formula to calculate stitching, you will misjudge 3.5mm as "0.88mm must be changed".

5. choose stitching according to the scene-only give the conclusion, and the details will be linked back to the general outline.

5.1 monitoring scenario

The monitoring scene is mainly based on information display, with low sensitivity to patchwork and blind application of 0.88mm to waste budget. For the complete configuration of each scene, please refer to the General Outline of Monitoring Splice Screen Scheme.

5.2 advertising scene

Advertising scene heavy visual impact, close-up priority ultra-narrow slit; but strong light environmentBrightness affects viewing effect more than patchworkFor the complete selection, please refer to the General Outline of Advertising Splice Screen Scheme.

6. select seams on budget-cost decisions.

6.1 Patchwork Specification and Cost Comparison Table

6.2 cost decision logic

Choose the patchwork that best matches the scene within the budget range, instead of pursuing the minimum: the viewing distance of more than 3 meters, the visual difference between 3.5mm and 0.88mm is almost indistinguishable, and the budget spent more (relative multiple of 1.3 × to 2.5 ×) cannot bring about equivalent visual improvement. Budget decision sequence: first meet the lower limit of the patchwork of the viewing distance, and then close the budget in the "3.5mm economic file/1.8mm standard file/0.88mm high-end file.

7. patchwork selection decision-making process

1. Confirm viewing distance: According to the grade within 3 meters/3-6 meters/above 6 meters, set the lower limit of splicing.
2. Confirm application scenario: monitoring/advertising/conference/exhibition hall, compared with the scene table in chapter 5.
3. Confirm Content Type: Frequently broadcast PPT and documents (with high white balance requirements) are preferred to 1.7mm; Video and data are mainly selected at 1.8mm and above.
4. Confirm budget range: Set the file against the cost multiple table in Chapter 6.
5. Matching patchwork specifications: Lock 1-2 candidate specifications with the Chapter 4 matching table.
6. Confirm panel source and stability: Verify the mass production status and panel brand of the flat seam according to the manufacturer's specification (see panorama table for common diameters).
7. Identify suppliers and after-sales: Focus on the installation accuracy capability (high 0.88/0mm requirement) and spare parts and after-sales capability. For details, please refer to the topic of "Bidding Parameter Template.

Common Mistakes in 8. Seam Selection

1. The smaller the patchwork, the better?The smaller the seam, the higher the cost, which must be judged comprehensively in combination with the viewing distance and the scene. 3.5mm is enough for monitoring the scene above 3 meters.
2. 0mm really seamless?0mm is visual seamless, non-physical seamless; optical seamless technology in the static state has obvious white edge, boot display image only "hide" border.
3. Ignoring viewing distance?At a viewing distance of more than 6 meters, the visual difference between 3.5mm and 0.88mm is almost indistinguishable.
4. Ignore panel source?According to the common caliber, 1.7mm is mostly Samsung and 1.8mm is mostly LG. The stability of the panel is different from that after sales, which needs to be verified according to the manufacturer's specifications.
5. Ignore the difficulty of installation and maintenance?0.88mm and 0mm require high installation accuracy and professional technical support.
6. only look at patchwork don't look at the brightness?In strong light environments such as store windows, brightness affects the viewing effect more than stitching (see the general outline of the advertisement for details).
7. Ignoring the physical nature of patchwork?The patchwork is a "bilateral physical patchwork" (the sum of the black edges of the two screens), and a slight gap is reserved between the two screens during installation.

9. FAQ

1. Is 3.5mm patchwork enough for monitoring splicing screen?The viewing distance of more than 3 meters is sufficient. Monitoring is mainly based on information display, and the sensitivity of patchwork is low.
2. What is the difference between 1.7mm and 1.8mm?The difference is only 0.1mm, and the vision is almost the same. According to the common caliber, 1.8mm is mostly LG and 1.7mm is mostly Samsung. The main difference is white balance and stability.
3. Is 0.88mm worth the extra budget?A close look within 3 meters (showrooms, high-end stores) is worth it.
4. 0mm seamless splicing screen is really no gap?No. It is visually seamless (optically hidden), the physical patchwork still exists, and the static state has white edges.
5. patchwork and how to match the viewing distance?0.88/1.7mm within 3 meters at close range, 1.8/3.5mm at middle range of 3-6 meters, and 3.5mm above 6 meters at far range.
6. Can 8mm patchwork still be used?Not recommended. Mainstream panel factory gradually stop production, spare parts supply is at risk.
7. How big is the meeting room?Select 1.7/0.88mm for close-up broadcasting documents; Select 1.8mm for medium-range general occasions.
8. what shopping mall advertising screen selection patchwork?Atrium looks 3.5/1.8mm from afar; Entrance and window look 0.88/1.8mm closer.
9. How to solve the problem of bright edge of 0mm?It cannot be eliminated; There is no influence when the image is displayed on the computer. If there is a static image in the acceptance, it is necessary to communicate with Party A in advance.
10. 1.7mm panel stability?In the experience of the industry, there have been rumors of flower screens and production has been discontinued. Now the market supply has been restored, subject to the official instructions of the panel factory. 1.8mm is optional for stability.
11. patchwork the smaller the price how much more expensive?The relative multiple is about 1.0 ×(8mm) to 3.0-3.5 ×(0mm), and the overall price difference of 0.88mm relative to 1.7/1.8mm is about 40%.
12. patchwork size and screen size has a relationship?Related: Large size units (55/65 inches) can reduce the number of splicing gaps per unit area.
13. Is it necessary to monitor the scene with 0.88mm?Public security command center and other close-up scene needs; Conventional monitoring 3.5mm is enough.
14. How to write the bidding parameters?It is suggested to write the upper limit value of "≤ 3.5mm" for the patchwork parameters and indicate the viewing distance. For detailed writing, please refer to the topic of "Bidding Parameter Template.

10. summary: patching is a decision-making tool, not an arms race

The core logic of patchwork selection is summarized in one sentence:The viewing distance determines the lower limit of patchwork, the scene demand determines the upper limit of patchwork, and the budget determines the final choice.. If you choose the right patchwork specifications, the project will be half successful-conversely, blindly pursuing 0.88mm in projects with a viewing distance of more than 3 meters is to spend the budget in invisible places.