How to choose the screen size and resolution of the inquiry machine: 32-85 inch | QUNMAO source manufacturer

The larger the screen, the better the inquiry machine?

For an 85-inch screen, if the user stands at a distance of 1 meter to operate, he has to turn his head and reach for it, but the experience is not as good as 32 inches. The wrong size is the most common and difficult to remedy in the query machine project.

One of the most frequently asked questions from overseas purchasers, system integrators and equipment traders is "how big is the screen for the inquiry machine". The answer is not in the screen itself, but inWhere the user stands, how far he looks, and where his hand can reach. AsSource manufacturer of China touch query all-in-one machineQUNMAO Qunmao currently supplies 32, 43, 49, 50, 55, 65, 75, 85 inch and other horizontal inquiry integrated machines of various specifications. The following is a clear explanation of the selection logic with these real sizes on sale.

Three consequences of wrong size selection

• Too big:When operating at close range, turn your head and raise your hand. The edge of the screen is out of reach, the information appears sparse, and the experience drops.
• Too small:The distance is not clear, the attractiveness of the equipment is insufficient, and there is no way to assume the two functions of "display" and "query" at the same time.
• Mismatch with point:Large-size equipment is placed in narrow corridors, which affects traffic. Or the volume of the equipment exceeds the elevator and door opening and cannot be transported after arriving at the site.

Two kinds of distance: operation distance and attraction distance

The inquiry machine should be both "accessible" and "visible". These are two different distances.

Our in-station information gives recommended viewing distances for different sizes. The following figure draws these ranges on the same ruler for easy and intuitive comparison (data from QUNMAO's own multi-distance prototype observation, as a selection reference):

It should be noted that the states referred to by "viewing distance" in the data of different models are different. For horizontal models with smaller size and close operation, the common operating distance is 0.8 to 1.5 meters. When the larger size assumes the display function, it is recommended to watch farther. When selecting the type, first determine whether the equipment is mainly responsible for "inquiry" or "display", and then correspond to the corresponding distance. A simple judgment:The 85-inch screen is hard to see at 1.5 meters. First measure the distance and then size it.

How to calculate the pixels per inch: it is also 1080P, why do different sizes have different perception

The pixel density (PPI) algorithm is simple:Number of diagonal pixels on screen ÷ number of screen inches. The number of diagonal pixels of 1920 × 1080 is about 2203. The larger the size, the lower the PPI, the larger the individual pixels, and the easier it is to see the pixel particles at close range.

According to the resolution limit of conventional vision (about 1 angular minute), the nearest distance of "the naked eye cannot see a single pixel" can be estimated. The following table is an estimate calculated by formula and is used only to understand the trend:

This table brings two practical conclusions:

• When the operating distance is close (less than 1 meter), the edge of the 1080P screen over 43 inches will be easier to see than the small size. At this timeInterface font size, font selection, and renderingMore important than simply improving resolution.
• If the project needs to read a lot of small print or map details at close range, consider the native 4K panel. 1080P is usually sufficient for display and regular query interface.

List of sizes on sale in QUNMAO: 32 to 85 inches

The following is the size of the horizontal inquiry all-in-one machine currently supplied by QUNMAO, as well as the reference for selection. Specific models and parameters shall be subject to the corresponding specifications.

Vertical self-service terminals that require small sizes (such as 21.5 inches, 27 inches, 32 inches, used for ID card identification, printing, membership services, etc.) belong to the category of self-service terminals, please refer Vertical self-service terminal with 27 inch touch self-service inquiry terminal; If you need a vertical touch query all-in-one machine, you can learn more about it. K-type vertical touch inquiry all-in-one machine。

The detailed configuration of different sizes has also been expanded in two articles:"K-type horizontal inquiry machine screen size and configuration how to choose" and L-Type Horizontal Query Machine Screen Size and Hardware Configuration Guide。

Resolution: 1080P, 4K decoding and native 4K difference

Many projects really need "4K video", not necessarily "4K panel".

These two concepts are often confused and are the most misunderstood by overseas buyers:

Take our specifications for 43-inch and 50-inch capacitive inquiry machines as an example. The panel is 1920 × 1080 IPS and supports decoding and playing of 4K video and pictures. For the regular query interface of government affairs, banks, hospitals and shopping malls, this configuration is clear enough. If you want to read a lot of small characters or high-precision maps at close range, consider the native 4K panel. For models above 65 inches, the specific resolution shall be subject to the panel parameters of the corresponding specification.

Brightness and visual angle: don't just look at the resolution

No matter how high the resolution is, the brightness is not enough, and it cannot be seen clearly in a bright environment. Common brightness sub-files are as follows:

The brightness is not the higher the better: after exceeding a certain level, the cost and power consumption will rise, and long-term close-up viewing may also bring visual fatigue. In addition, the horizontal inquiry machine adopts inclined or inclined structure, and users often watch and operate from the angle of inclination, soVisual AngleJust as important. Our specification adopts IPS panel with wide viewing angle.

Remind one thing: outdoor and semi-outdoor areas cannot be replaced by "increasing the brightness of the indoor unit", and special outdoor models should be selected.

Scene and size match

For more specific scenario scenarios, refer "Government Hall Information Inquiry Machine Scheme"、"L-type horizontal hospital inquiry machine | hospital self-service guidance solution" and Supermarket self-service inquiry machine solution。

Ergonomics and installation: fit and reach

• Operating height:The height of the center of the screen should take into account ordinary users and wheelchair users, and the horizontal inclined structure can reduce the difficulty of operation.
• Width of walkway:Equipment occupation plus user station, to leave enough space for traffic. Taking a narrow hospital corridor of 1.6 meters wide as an example, 43 inches is more appropriate and 50 inches needs careful evaluation.
• Queue buffer:At points with large flow of people, there should be queuing space in front of the equipment to avoid blocking the passage.
• Handling path:For models of 65 inches and above, check the elevator, door opening width and floor load before placing an order.
• Fixing method:Landing, wall hanging, embedding, different methods have different requirements for size and structure.

Key points of overseas projects: specification, transportation size and power supply check

Inches vs. Millimeters

Between overseas buyers and factories, often because of the "inch" and "millimeter" conversion deviation. At the quotation stage, the inches, display area (mm) and the size of the whole machine should be stated at the same time. For example, in our specification, the 43-inch display area is 942.2 × 530.4mm and the 50-inch display area is 1073.8 × 604mm.

Size of whole machine and package

Take the 50-inch Windows edition (QM-C50XJ-P) specification as an example: the overall size is about 1117.8 × 648 × 87.45mm (including wall hanging parts), the packaging size is about 1250 × 135 × 790mm, the net weight is about 26.5kg, and the gross weight is about 30kg. The size and weight of the whole machine and packaging directly affect the logistics budget, handling mode and on-site access requirements. It is recommended to ask the factory for it at the quotation stage.

Power check

The power supply marked on the 43/50 inch specification is AC 110-220V. Before placing an order for an overseas project, the buyer's electrical personnel shall check the local nominal voltage and socket type, confirm that it is within the input range of the specification, and configure the power cord according to the local plug type. When different countries are involved, it is recommended to confirm in writing.

Certification and Specification Version

Device certificates are available at Qualification Certificate Page Check that the access requirements of the specific destination country are subject to local regulations and bidding documents. Please note the revision date of the specification, the latest version shall prevail.

Third gear configuration example

The following table provides configuration references for different positioning based on our specifications. The touch scheme varies according to the model: the 43/50 inch specification is capacitor G G and 20 points; Touch schemes of other sizes shall be subject to the specifications of the corresponding model. For the choice of touch scheme, please refer to our selection article on "capacitive screen and infrared screen.

The specific memory, storage, interface and system selection will be expanded in the hardware configuration guide; at present, please refer to the specifications of each model.

QUNMAO Kuala Lumpur Bank Project: 18 43-inch inquiry machines, 4-week delivery

The most representative of this project is that the customer wanted to choose 55 inches at the beginning, and finally chose 43 inches, and both parties believed that this was the right decision.

Project Overview

Customer's core demands

Customers hope to deploy unified inquiry equipment in the business hall of each branch for business guidance, interest rate and rate publicity and branch information inquiry, so as to alleviate the repeated consultation in front of the counter. The purchasing team has two opinions on the size: one is 55 inches, which is "more magnificent and eye-catching"; The other is worried that the lobby space of the outlet is limited and the customer's station is very close.

Our approach: use distance and prototype to speak

Instead of giving a direct conclusion, we did three things. First, please provide the lobby plan of several representative outlets, and measure the predetermined position of the equipment, the width of the passage and the distance of the customer's regular standing position. The operating distance of most points is about 1 meter. Second, 43-inch and 50-inch prototypes are provided for customers to place in the field at the outlets and use the same interface to do close-up operation tests. Third, the "operating distance" and "attraction distance" are discussed separately: the attraction during standby is compensated by increasing the font size and brand color block of the standby picture, rather than by increasing the screen.

The evaluation result is: under the space and standing conditions of most outlets, 43 inches is more balanced between operating comfort and floor space; For individual outlets with more open space, customers have reserved the possibility of adding 50-inch equipment in the future. Finally, the 18 outlets are unified with 43 inches, which is convenient for the unification of procurement, spare parts and maintenance.

Four-Week Delivery Pace

Problems Encountered in the Project and Handling Methods

1. size dispute: 55 inches or 43 inches

There are different opinions within the purchasing team. We provided a prototype and worked out a trial method with the customer, using a unified interface and doing close operations on the actual station, so that everyone can feel it for themselves, rather than judging by imagination. Trial records are archived as a basis for size decisions.

2. power supply and plug check

The power supply marked in the specification is AC 110-220V. In the early stage of the project, we asked the customer's electrical personnel to check the voltage and socket type of each network point, and confirmed in writing that it was within the input range of the specification, and at the same time configured the power cord according to the local plug type to avoid problems found after arrival.

3. dot dispersion, installation and configuration to be consistent

The 18 outlets are scattered in different locations, and each outlet has only one device. We pack the equipment according to the network number, attach the installation guide with pictures and texts, and install it in batches by the local integrator designated by the customer. All equipment is configured in a unified way when leaving the factory, and the content is released in a unified way by the cloud. After installation, the status of the equipment is checked in batches through remote means, thus reducing the workload of on-site commissioning one by one.

Project Results

• To the customer:In the network hall, you can self-service query business guidance, interest rates and network information, close operation comfort.
• For branch employees:Repetitive consultation in front of the counter has been reduced, and employees can spend their time on business that needs to be handled manually.
• To the bank headquarters:The configuration of 18 devices is unified, the content is released centrally, and the update of public information such as interest rates is easier to maintain consistency.

18 sets of equipment were delivered within 4 weeks and put into use at various outlets.

Customer feedback

Size Selection List

Requirement confirmation

• Equipment mainly responsible for inquiry, display, or both
• Operating distance and attraction distance
• Channel width, space and user station of point
• User groups: whether there are wheelchair users, the elderly
• Ambient light: whether there is strong light by the window

Specification check

• Size, Display Area (mm) and Resolution
• Panel type: 1080P, support 4K decoding or native 4K
• Brightness, contrast and viewing angle
• Touch scheme and points
• Size and weight of whole machine and package
• Power supply range and local voltage, plug type

Prototype Verification

• At the actual point, according to the real station trial
• Test readability with real interfaces and copywriting
• Confirm the carrying path (elevator, door opening, load bearing)
• Record the results of the trial as a basis for decision-making

Frequently Asked Questions

Conclusion: first measure the distance, then determine the size, and then use the prototype to verify

Back to the question at the beginning: Is the larger the screen, the better the query machine? Now the answer is:Suitable is the best. The size is not a number on the parameter table, but a balance between operating distance, point space, content design and budget.

As the source manufacturer of China's touch inquiry all-in-one machine, QUNMAO Qunmao has mature products from 32 inches to 85 inches, and also has experience in helping customers make decisions according to prototypes and points. The "55 inches to 43 inches" in the Kuala Lumpur Bank project is such an example. Choosing a source factory that is willing to accompany you to measure the distance before making a prototype can save the whole project many detours.