General Questions




General Questions

Differences between Luminous Flux (Lumen) & Illuminance (Lux)

Luminous Flux 

• Lumen (i.e. lm) is the unit of luminous flux. Luminous Flux normally refers to the luminance of projector. 

• Luminous Flux is a measure of the total quantity of visible light emitted by a source per unit of time. Also known as the light energy absorbed by an illuminated object per unit of time. 


• Lux (i.e. lx) is the unit of illuminance. 

• Illuminance refers to a measure of how much luminous flux is spread over a given area.


Luminous Flux measures the total "amount" of visible light present, while the illuminance measures the intensity of illumination on a surface. 

One lux is one lumen per square meter. Mathematically, 1 lux= 1 lm/m2

For example: A flux of 1000 lumens, concentrated into an area of one square meter, lights up that square illuminance of 1000 lux. However, the same 1000 lumens, spread out over ten square meters, produces a dimmer illuminance of 100 lux. 

Luminance (lumen) = illuminance (lux) * screen area

For the same projector with fixed Luminance (lumens), the larger the projected area, the less illumination it produces; Vice versa, the smaller projected area, the more illumination it assembles.

What’s the difference between LED, LCD or DLP?

DLP, LCD and LED are three main technologies used for projection. DLP (Digital Light Processing) uses a chip made of tiny microscopic mirrors and a spinning colour wheel to create an image. DLP projectors deliver sharp images, don't need any filters, have a better response time as well as 3D capabilities. The effective lamp life of a DLP projector is only 2,000-5,000 hours. 

On the other hand, LCD projectors use liquid crystal displays, have no moving parts and thus are generally less expensive. If you are on a budget a single chip LCD projector is ideal. Most LCD projectors come with long-lasting lamp and the lifespan can reach 50,000 hours, that’s much longer and cost-effective than DLP projector. 

LED projectors are smaller and generate less heat. Do keep in mind that LED projectors have limited brightness compared to LCD or DLP so they are not recommended if your room has a lot of ambient light.

How much brightness do I need for a home projector?

When buying a video projector for your home entertainment, it’s preferable to consider how much brightness that you actually need for your living room or home theater. In daytime conditions, higher lumens are strongly recommended because too bright a room can heavily impact the image quality and wash out everything you see on the screen. For rooms with dim light, there is not much restriction on the brightness, 1,000 to 2,000 lumens can meet your satisfaction for bright and clear images.

What is throw ratio? Are screen size and throw distance important?

Projectors have the main specification which is called a “throw ratio”. Throw ratio is basically the specification which is determined by the first two pieces of the information in an equation.

Does resolution matter? What resolution do I need for my home theater?

Generally speaking, the higher the resolution, the better the image quality, and the more the projector will cost. Higher resolutions can display more detail in the picture, and can reduce or eliminate the visibility of the pixel structure. Both of these are highly desirable in good home theater. The native 1080p resolution projectors are most recommended for home theater, as they are affordable to most projector users.

How can I use keystone correction function to get ideal images?

Most projectors come with manual keystone correction or digital keystone correction. If you have a projector that only has manual correction, you need to adjust the lens manually because the correction is not that smart. Comparing to manual keystone correction, digital correction is flexible and much easier. Some projectors have a selected algorithm to make the image square automatically if the projector is at an angle. This can save you a lot of time when setting up a projector.

How to reduce the noise of my projector while keeping it from getting overheated?

Projectors make more noise than TV. This is due to the ventilation that cools the device. To reduce the noise, a cool place is needed. Don’t put your projector in the sun and keep it away from any object that will impact optimal ventilation. By doing this, the cooling system makes less noise and the projector will not be overheated. The less noise from the video projector, the more you can enjoy the sound of your movie.

What are the advantages of a full HD video projector?

Video projector has a major advantage over TV: the feeling of truly experiencing the film or being only a few meters from the actors or a football match, for example. In this way you can transform your living room into a movie theater to enjoy with your families or friends! You can also enjoy your life-size video games.

What to do when the brightness of the projector lamp is too low?

The reasons for the low-light symptom can be 

1) The projector lamp reaches the end of its life; 

 2) The brightness setting of the lamp is too low 

 3) The power supply of the lamp is defective 

Check what is in the video projector menu 

Check the lamp usage counter: The lamp usage counter is close to 2000 hours? This confirms that your lamp needs to be replaced. 

Controlling the brightness level: The brightness can be adjusted on your video projector. 

Contact the after-sales service 

It may be useful to contact the customer service department of your videoprojector supplier to establish a diagnostic.

Troubleshooting for Projectors

- Display Available Without Audio

  • Projector is muted

  • Device (PC, TV, etc.) muted.

  • Dolby sound is not supported, exit to play again.

  • Profile audio format is not supported by projector. E.g. Projector supports 1080P and 1080I video won’t play audio.

  • VGA connection can only transmit analog signal of video not audio. External speaker is required when device is connected via VGA cable.

  • Encryption applied on the videos or media player which holds the video. Try more videos to define this possibility.

  • Exclude possibilities above, try another HDMI cable /external speaker, and a 2.0USB disk/ Micro SD card within 32G/USB hard disk within 1TB to play directly to see if both video audio available.

Still doesn't work? Maybe...

  • Profile audio format is not supported by projector. 

  • Encryption applied on the videos or media player which holds the video. 

  • If lamp is off with only audio playing, lamp is defective. Please contact seller for replacement. 

  • ※Try another HDMI cable if it’s connected through this channel.

- No Signal

  • Make sure all cables are plugged correctly and firmly.

  • Source input must comply with source output. e.g. if device is connected with projector from HDMI port with HDMI cable, HDMI input channel must be selected while projecting.

  • 2.0USB disk is supported on the projector. If a 3.0USB is connected, it will only show ‘No Device’.

- Blurry Images or Out of Shape

  • Adjust focus ring near lens on machine by moving it leftward/rightward till it shows the best images.

  • Adjust keystone on the back and kickstand on the bottom of machine to get the best images.

  • Place projector on flat surface horizontally or vertically. Inclination of any angle may result in blurry displays or uneven colors.

  • Darker environment suggested to achieve the best projecting performance.

  • Eligible distance of 1.2m-6m/4ft-20ft between projector and projecting screen/wall. The best distance is 2m/6.5ft with viewing size of 60-90inch.

  • Projecting wall or screen is blank clean of white color is needed.

- Up Side Down Images

  • Press ‘FLIP’ button on projector remote (based on certain model) or enter Menu-Picture to flip the projection image accordingly. Projector supports front installation front/back projection, lifting installation front/back projection.

- Projection screen is not square or allied horizontally

  • Make sure projector is placed on flat surface with projector light in the middle of screen.

  • Make sure the projector screen is placed horizontally.

- Color Distortion

  • Make sure video source has a fine resolution.

  • Adjust RGB by steps: menu-picture-color temperature, then select different modes and adjust value accordingly.

  • Reset projector to manufacturer setting by steps: menu-option-restore factory default.

- Unresponsive Remote

  • Make sure batteries are installed correctly and power is enough. 

  • Remote works with projector through IR. Some models have IR button installed on the back. Remote works only when IR is in direct reaction distance and will be unresponsive if IR button is blocked or covered.

- Small Dots on Display

  • Tap projector slightly to shake off the small spot which would be caused by dust in installation or shaking during shipment .

  • Clean lens with clean non-woven fabrics.

- Expanding Dark Spot/ Overheat/ Smoke

  • Check if fan noise increases or fan stops working. Unplug projector and contact seller in this situation.

  • Make sure outlet and projector power adapter are not wet or humid which will cause sparks when power on projector, or smoke on outlet.

- Doesn’t Power on/ Shut off During Playing

  • Confirm power plug is working and firmly fitted in outlet.

  • If the power indicator lights on but fan doesn't work, please contact seller for assistance.

  • Overheat on projector will activate built-in power-off protection panel. Restart machine when projector gets cooler.

  • Overload of power when USB disk of 1TB or above is connected without external power supply will cause shutting off. Insert the disk when projector is powered off or provide external power supply for disk would solve the issue.

- 3D Effect Unavailable

  • Projector supports 3D video source, and 3D viewing performance achievable with 3D glasses provided.

- Nothing Works in Main Screen especially with External Storage Connected

  • Correct channel must be selected when you use USB flash disk or memory card, otherwise, ‘No Device’ will be showed on up left corner of display.

  • In folders display, all videos or photos in your disk or memory card will take a place in every folder but they play only when format of exact file included is in accordance with name labeled of the folder. E.g. Open folder ‘Photo’, you will see photos, videos, music, but only photos can be opened. Open folder ‘Video’, only videos work and you cannot open photos even they are included.

- PowerPoint, Excel, Word Files don’t Work

  • Projector works as a monitor and project files above when it’s connected to a computer or laptop.

  • Projector works as a monitor and project files above when it’s connected to a computer or laptop.

- Lamp doesn't Light Up

  • Please contact seller for assistance when this occurs.

- How to Switch to DHMI Mode While Connecting to Laptop

  • For windows7/8/10 users, the letter P--as in "Projector." Specifically, pressing Windows-P invokes a new display-switch toolbar that makes it a snap to switch between various display modes. Combination keys might vary depending on different computer brands or models. Link with detailed information: http://kb.mcgill.ca/?portalid=2&articleid=1750#tab:homeTab:crumb:8:artId:1751:src:article.

  • For Windows XP users, please refer to this video: https://www.youtube.com/watch?v=fV6PQu1VzFg.

  • For Mac users, please go to Apple Menu; Select System Preferences from the drop-down menu; Select the Displays icon; When the Displays window appears, click the Detect Displays button. At this point your Mac and projector should be synchronized.

- Only Preview Display Not Full Screen (for certain models)

  • Press source button on projector to enter full screen playing.

  • Press play button on remote to enter full screen playing.

- How to Set Language

  • Press Menu = on projector or remote -Option -OSD Language-Select Language.

- How to Connect to Smart Phone

  • HDMI adapter /hub is needed to delivery display from smart phones. Adapters vary depending on smart phones.

- Size of Screws of Mount Projector

  • Mounting projector on ceiling requires compatible screws with nut in projector: Below are size info of screws for different models:

    Leisure3: M4 screw.

    Leisure410: British Standard Pipe Thread of 1/4 inch.

    Leisure510: M3 screws; Open the 4 foot-pad caps on the bottom of projector to find nuts.

- Cables to Connect TVBOX ,TV ,Firestick,DVD

  • HDMI for all devices mentioned above. For some TV without HDMI port, VGA cable will be working. Certain DVD models require AV cable connection.

- How to Display PowerPoint on Projector

  • To project from a PC or other devise with PC working system, projector works as a monitor and supports PowerPoint profile display. Due to higher requirement for brightness and clarity in professional use, we do not recommend using this projector for PowerPoint presentation.

  • To projector from USB disk, PowerPoint is not supported. However, we can save PowerPoint profile as PNG, or IPG or other image format which is supported by projector, then select photos we plan to do loop play. Default interval of each photo is 1 second and we can pause it by controlling through remote or button on projector.

Contact us if you have any questions.