Q&A
Q1:Why does BackLight FLY use density as design principle?
A:Light travelling pattern in LG (light guide) is as total reflection; thus, we need dots on the LG to break total reflection and let light come out. It is clear that luminance is function of light intensity and dot density; therefore, there is no doubt that density is the best way to design LG dots.
Q2:How to design “design lines”?
A:We use dots, auto generated at the cross of design lines, to control density distribution. Any times you change dot values it will automatically recalculate density map by cubic function to keep density map smooth. In dramatic density change area (edge sides), you need more design lines for better control and less in other area (center of LG)
Q3:How to adjust design lines?
A:We provide reset, add, delete, move and edit functions. It should cover all actions of design lines.
Q4:How to change density value at dot?
A:You can change value in active dot window directly. To do this, select dots and do multiple or adjustment or select more than 3X3 dots and do a gradient adjustment, most easy way is to click right mouse, the pop menu shows most popular functions.
Q5:How to make sure that density profile is smooth?
A:Basically, we will smooth the density by cubic function. Cubic function guarantees piece-wise smooth; however, it is not enough to satisfy LG design needs. So you still need to check each design line’s profile in the left window (X, Y profile) and make them fully smooth. You can archive this by just adjusting dot value or open profile chart and use mouse to drag design line smooth.
Q6:What is the design difference between same pitch and same size output?
A:Density design is independent with output format. So you can use same design file for different processes. For example you can use same pitch experience (etching) to same size process (laser).
Q7:What is the definition of density?
A:It is very straight forward that density means dots area divide total area (area of coverage). The resolution is relate to pitch or size setting in your output.
Q8:How to adjust dot size in same pitch output?
A:You can use CAD tool to adjust output DXF file, but it is not necessary. Actually you just need to adjust density and system will adjust size according to density.
Q9:What is the dimension unit?
A:The dimension unit default is 0~1. You can switch to real design dimension in main menu tools/options.
Q10:When I adjust some dot values, why it sometimes causes other changes?
A:We use 5 points to do a piece-wise-smooth curve fitting, when a value is raised or lowered dramatically, it is necessary to change the curve style in order to keep up the smooth. To avoid this, you can use mask block function special is LED hot spot sits.
Q11:What means of mask-block function?
A:This function is very useful to fix LED hot spots, you can thinking you have some gradient labels which shape like ellipse. You can past it any location to increase or decrease local density. Using this method you can change density without disturb gobble smooth.
Q12:What is the differential ship about BackLight FLY?
A:There are some good ideas in Backlight FLY design. For instance
- 1. simple and works.
- 2. fast and fast
- 3. over 200M dots output capability
- 4. Moore-free or less.
- 5. Systematic design and thus better experience feedback.