Light-emitting component, light-emitting device, and image forming apparatus
A technology for light-emitting components and light-emitting devices, which is applied in the fields of light-emitting devices, image forming devices, and light-emitting components, and can solve problems such as mixing in and disorder of the light-emitting spectrum of light-emitting elements, and achieve the effects of easy design, suppression of adverse effects, and reduced wavelength dependence
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no. 1 approach
[0050] (Image forming apparatus 1)
[0051] figure 1 It is a diagram showing an example of the overall configuration of the image forming apparatus 1 to which the first embodiment is applied. figure 1 The image forming apparatus 1 shown is an image forming apparatus generally called a tandem type. The image forming apparatus 1 includes: an image forming processing section 10 that performs image formation corresponding to image data of each color; an image output control section 30 that controls the image forming processing section 10; and an image processing section 40 that is compatible with, for example, A personal computer (PC) 2 or an image reading device 3 is connected, and performs predetermined image processing on the image data received from the PC 2 or the image reading device 3.
[0052] The image forming processing section 10 includes image forming units 11Y, 11M, 11C, and 11K (in the case where they are not distinguished, they are described as the image forming unit 11)...
no. 2 approach
[0319] In the light emitting chip C of the second embodiment, the light emitting layer 87 of the light emitting diode LED is sandwiched between two distributed Bragg reflectors (DBR: Distributed Bragg Reflector) (hereinafter referred to as DBR layers). The DBR layer is constituted by stacking a plurality of semiconductor layers with a difference in refractive index. Furthermore, the DBR layer is configured to reflect light from the light emitting diode LED.
[0320] The structure other than the island 301 formed by stacking the driving thyristor S and the light emitting diode LED in the light emitting chip C is the same as that of the first embodiment. Therefore, the different parts will be described, and the description of the same parts will be omitted.
[0321] Picture 12 It is an enlarged cross-sectional view of the island 301 where the driving thyristor S of the light-emitting chip C and the light-emitting diode LED are laminated in the second embodiment.
[0322] In the ligh...
no. 3 approach
[0348] In the light emitting chip C of the third embodiment, instead of the light emitting diode LEDs of the first and second embodiments, a laser diode is used as an example of a light emitting element.
[0349] In addition, the structure except for the light-emitting chip C is the same as that of the first embodiment. Therefore, the light-emitting chip C will be described, and the description of the same parts will be omitted.
[0350] Figure 15 It is an equivalent circuit diagram illustrating the circuit configuration of the light-emitting chip C equipped with the self-scanning light-emitting element array (SLED) of the third embodiment. In the first embodiment Figure 5 The light-emitting diodes LED1 to LED128 become laser diodes LD1 to LD128 (in the case of no distinction, they are referred to as laser diode LD). Other structure and Figure 5 The same, so the description is omitted.
[0351] In addition, regarding the plan layout and cross-sectional views of the light-emittin...
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