Daido Steel

Daido Steel has set itself as a pioneer in LEDs manufacturing by developing LEDs using the MOCVD method since 1985, long before MOCVD method became the major LEDs manufacturing method.

Daido Steel, also, has over 20 years of LED sales experience in the industrial machinery market, making it the perfect ally for your project.

Technology Overview
Product Lineup

Point Source LED (PSL)

High-performance point source LEDs, suitable for high accuracy sensors

Star LED (Daido's LED brand name) is a point source LED, used for high resolution optical encorders and photoelectrical sensors.

Comparison between Point Source LED and Surface Emitting LED

Point Source LED

Surface Emitting LED

Application

Optical encoders
Photoelectric sensors
Semiconductor manufacturing equipment
Medical testing equipment

LED lighting
Automative Headlights
Backlights

Beam size

Smaller beam size
Higher light intensity per unit area

Larger beam size
Lower light intensity per unit area

Shadow of object

Clear shadow

No clear shadow

Technical advantages

High resolution and accuracy

Star LED (Point source)

General LED (Surface emission)

For optical encoder

Shaper images
Higher resolution

Loose images
Lower resolution

For photoelectric sensor

Smaller beam size
Higher precision

Larger beam size
Lower precision

High-temperature operation

Flexibility in encoder thermal design with high temperature operation (105 degree).
High reliability at high temperature and high current operation.

Applications

target application: photoelectric sensors

Infrared Point source LEDs

Wave length (nm)	Part number	Dimension (µm)		Light output (mW)	Cutoff frequency (MHz)	Features
Wave length (nm)	Part number	Light emitting window	Die size L x W x T	@50mA	@50mA ±20mA	Features
855	MED8P51	170 x 50	590 x 370 x 250	2.0	-	Oval shape window
	MED8P53	φ60	370×270×250	2.0	45	Small window
	MED8P54	φ160	490×310×250	2.4	25	High reliability
	MED8P56A	φ160	510×350×250	2.4	25	Low stray light
	MED8P62	φ60	590×370×250	2.0	45	Ball lens mountable
	MED8P67A	φ60	400×300×250	2.0	45	Small window Low stray light
	MED8P73	φ60	370×270×250	2.0	45	105℃ operation
	MED8P74	φ160	490×310×250	2.4	25	105℃ operation

Red Point source LEDs

Wave length (nm)	Part number	Dimension (µm)		Light output (mW)	Cutoff frequency (MHz)	Features
Wave length (nm)	Part number	Light emitting window	Die size L x W x T	@20mA	@20mA ±10mA	Features
650	MED7P2	φ160	490×310×250	1.0	-	High reliability
	MED7P3	φ160	490×310×250	0.8	30	High Speed
	MED7P4	150x40	490×310×250	0.9	-	Oval shape window
	MED7P5	φ150	370×220×180	0.9	-	High reliability
	MED7P7	φ80	320×220×200	0.9	-	Small window
	MED7P14	φ160	520×340×150	2.0	-	High output

LED package

Type	Part number	Wave length (nm	Beam angle	Output power (mW)		Remarks
Type	Part number	Wave length (nm	FWHM(°)	@20mA	@50mA	Remarks
Surface mount	MED7P14-SMF-1	650	130	5.7	-	Thin
Can	MED8P53-M18F-2	855	120	-	2.0	TO-18 flat lens
	MED8P54-M46F-5	855	100	-	2.8	TO-46 flat lens
	MED8P54-M46L-2	855	4	-	4.0	TO-46 dome lens