In the current age of technology, the use of projectors in teaching is an inevitable trend that partially replaces white paper and blackboards, helping teachers to be more effective, not just more efficient.

The role of projectors in teaching is great as it helps the process of content delivery to be faster and more effective. According to experts, classrooms equipped with projectors are more lively and students pay more attention to lectures. Teachers using projectors can save time writing on the board, and good-looking written content makes it easier for students to see what is being taught.

When a teacher uses a projector to teach, it will be easy to make the lecture more lively and interesting by adding sounds, images, and colors …… Even the instructor can run the entire video related to the lecture …… Help students feel more engaged and interested than listening to the theory.

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Effectiveness of projectors in the age of 4.0 technology

Preparing flexible and engaging lectures

The most obvious effect of a projector in teaching is that lectures will be more lively. Using editing tools such as Word, Excel or Powerpoint can make lectures professional and interesting. Teachers can easily present images and video content as evidence of dry textual content.

Learning with interesting images and videos helps students to be more comfortable mentally. Henceforth, it helps in effective delivery and faster absorption of lessons. The projector is considered as a bridge of information between the lecturer and the students.

The slides are loud and clear and easy to observe

One effect of the projector in teaching that is unmatched by other audiovisual equipment is the ability to project on a large screen. Large screens range in size from 120 inches to 200 inches and can accommodate classes of 50 to 200 students.

The presentations are large and easy to observe from any corner of the classroom or auditorium. Students can all see the lecture clearly without having to push and shove each other to choose a spot near the writing board, as they used to do.

Save writing time

One effect of the projector in teaching that many teachers like is the time saved on the blackboard. Not only does writing on the board take time, but sometimes the handwriting is so small that it is difficult for students to sit at a distance. In addition, writing quickly can make handwriting difficult to read, causing students to spend a lot of time reading and taking notes.

Instead, using a projector to project images onto a large, clear screen can help students observe easily. Teachers can prepare lessons at home to save writing time when coming to class. In addition, in many classrooms, lectures can be easily presented without the need for rewriting.

Video Recording and Playback of Lectures

When using the projector equipment, it is possible to make learning less stressful and more exciting not only through slide lectures, but also by incorporating actual videos related to the course. During video lectures, not only can the course be made interesting, but the instructor can pause the video to re-explain the content or concepts to the students if they do not understand them.

Teaching has long been an art that requires constant patience and sacrifice. At the end of a teaching day, teachers can feel completely exhausted, thanks to projector equipment that has been shown to help teachers’ workdays use less energy and improve their mood. Better.

High level of interaction between teachers and students

Education is currently being focused on developing and investing in supporting multiple forms and means of teaching and learning to help teachers and students achieve high levels of achievement. It is easy to see that teaching aids such as projectors are proliferating in lecture halls and classrooms, creating a good learning environment and good interaction between teachers and students to achieve learning outcomes. The best last episode

Bringing a modern learning environment

With the advent of projectors, an advanced and modern learning environment has been created. That is why projectors are of great significance in facilitating teaching and learning for teachers and students.

There is also the advantage that using a projector is less damaging to the eyes than devices such as televisions and led screens. Sitting in front of a TV for long periods of time to view content can strain students’ eyes. This is the reason why classrooms are gradually replacing TVs and using projectors more often.

What can happen to your eyes if you choose the wrong projector?

Blurry projected images are the main cause of the direct effect on the viewer’s eyes. Sitting in front of a dimly lit projection screen for long periods of time can cause our eyes to have to make more adjustments, which can cause myopia or astigmatism in the long run.

Every projector has a certain level of brightness, and the higher the brightness, the clearer the projected image will be. Most true projectors have good brightness so they are not harmful to the viewer’s eyes. However, there are many inferior products on the market, and these cheap projector products are sold for only a few hundred to a few million rupiah, with unclear origin and provenance.

The cheap projector models tend to have low brightness, resulting in blurry images. To attract buyers, these projectors often list enticing information such as wifi connectivity, wireless phone connectivity, smart Android operating system, etc. When using these products in a classroom environment In areas with high light levels, projectors with low light intensity will not be able to meet the brightness requirements during presentations, making students feel uncomfortable when looking at the projected image for long periods of time, which can affect student performance in the long run. Students’ eyesight.

How to choose the right projector brightness for each usage environment

As mentioned above, the brightness parameter is the main parameter that directly affects the quality and clarity of the projected image. To facilitate the process of purchasing products, VNPC will summarize below the basic brightness of projectors suitable for various purposes.

Brightness below 2000 Axiom: Only used in very dark projection rooms, such as watching movies in bedrooms and home theater rooms. Projection on a small projection screen less than 100 inches.

Brightness 2000-3000 Ancyron: Used in normal projection rooms with low light or natural light. Brightness typically used for home theater projectors and small conference rooms.

Brightness 3000 – 4000 Ancyron: This is by far the most widely used general purpose brightness. Can be used in medium and well-lit spaces. Used in classrooms, offices, cafes, and small movie theaters at home.

Brightness 4000 – 6000 Ancyron: This is a fairly high light intensity and is suitable for large projection rooms such as halls, auditoriums, schools, and restaurants. Environments with a lot of light influence, projecting on large projection screens of 150 inches or more.

In summary Projectors do not affect vision if we choose a good product. Do not choose a projector with low brightness, the projected image will be blurred leading to eye damage. When buying a projector, you should test it directly and choose the right light intensity for you. Which brand of projector is good for my eyes to buy? If you are an average user and don’t have a lot of knowledge, preferred big brands such as Panasonic, Sony, Epson, BenQ, Optima, Ubiquitous, Vivitek. manufacturers have advanced technology to ensure image quality and user health. In addition, their warranty service is better and more considerate. Is viewing through a projection screen less harmful to the eyes? Compared to TVs, LED screens, and computer screens, viewing through a projection screen will cause less damage to your eyes. This is because the contrast brightness of a projection screen is much lower than that of a TV screen. To use a projection screen for a long time and reduce eye strain, do not turn the brightness too high or too low. Limit sitting and watching for too long, and relax your eyes often to better protect them.