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Light-emitting components and light-emitting devices

A technology of light-emitting components and laser components, which is applied to laser components, optics, lasers, etc., can solve the problems that hinder the high-speed switching of laser diodes, and achieve the effects of rapid selection, simple circuit structure, and high-speed switching

Active Publication Date: 2020-12-18
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, for example, in a self-scanning light-emitting module that includes a light-emitting unit including a plurality of laser diodes and a setting unit that sets the light-emitting unit, and sequentially switches the laser diodes that emit light, switching the laser diodes in the light-emitting unit from an off state to an on-state In the on state, the signal cannot be responded to due to the delay of oscillation or the generation of relaxation oscillation, which sometimes hinders the high-speed switching of the light-emitting laser diode

Method used

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  • Light-emitting components and light-emitting devices
  • Light-emitting components and light-emitting devices
  • Light-emitting components and light-emitting devices

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0050] (light emitting device)

[0051] figure 1 It is an equivalent circuit diagram illustrating a light-emitting device equipped with a self-scanning light-emitting element array (SLED: Self-Scanning Light Emitting Device) according to the first embodiment.

[0052] The light emitting device includes a light emitting element C and a signal generating circuit 100 as an example of a driving unit that supplies a signal for driving the light emitting element C.

[0053] (Lighting component C)

[0054] The light-emitting module C is configured as an integrated circuit chip formed of compound semiconductor layers such as GaAs, GaAlAs, and AlAs laminated monolithically (epitaxially) on a substrate 80 such as GaAs, for example. In the light-emitting module C, the Vsub terminal provided on the back surface of the substrate 80 is drawn out of the substrate 80 and shown.

[0055] Here, the light emitting module C will be described in relation to the signal generating circuit 100 . ...

no. 2 approach

[0344] In the self-scanning light-emitting element array mounted on the light-emitting module C of the first embodiment, the laser diodes LD are turned on and controlled in numerical order. On the contrary, in the second embodiment, in the middle of the lighting control, the order of the laser diode LD to be turned on next is switched in the numerical order or the reverse numerical order.

[0345] Figure 11 It is an equivalent circuit diagram illustrating a circuit configuration of a light-emitting module C equipped with a self-scanning light-emitting element array (SLED) of the second embodiment and a signal generating circuit 100 .

[0346] The light emitting module C of the second embodiment is the same as that of the first embodiment except for the parts described below. Therefore, different parts will be described, and the same parts will be assigned the same symbols and their descriptions will be omitted.

[0347] Figure 11 The parts of laser diodes LD1-LD9, control...

no. 3 approach

[0422] The light-emitting component C of the first embodiment and the light-emitting component C of the second embodiment set the conduction state with a logic value “0” before turning the laser diode LD into the conduction state (lighting state) with a logic value “1”. state. Thus, the laser diode LD is not affected by oscillation delay or relaxation oscillation.

[0423] In the light-emitting component C of the third embodiment, the laser diode LD is always set to a conduction state with a logic value "0", and when the laser diode LD switches to a conduction state with a logic value "1", no Affected by oscillatory delays or relaxation oscillations.

[0424] (Lighting component C)

[0425] Figure 13 It is an equivalent circuit diagram illustrating a circuit configuration of a light-emitting module C equipped with a self-scanning light-emitting element array (SLED) of the third embodiment and a signal generating circuit 100 .

[0426] The light-emitting module C is the sa...

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Abstract

The invention discloses a light-emitting component. The light emitting assembly includes a plurality of laser elements and a setting part. The plurality of laser elements are set to an on state of a logical value "m", an on state regarded as having a logical value "0", and an off state, where m is an integer of 1 or more. The setting unit sets the laser element in a state capable of switching to an on state before a timing at which the laser element in a state capable of switching to an on state is brought into an on state having a logical value "m". , setting the laser element to an on-state considered to have a logic value "0".

Description

technical field [0001] The invention relates to a light emitting component and a light emitting device. Background technique [0002] Japanese Patent Laid-Open Publication No. 1-238962 discloses a light-emitting element array, in which a plurality of light-emitting elements that can control the threshold voltage or threshold current from the outside are arranged in one-dimensional, two-dimensional or three-dimensional, and each light-emitting element is controlled The electrodes for the threshold voltage or threshold current are electrically connected to each other by electrical devices, and clock lines for applying voltage or current from the outside are connected to each light emitting element. [0003] Japanese Patent Application Laid-Open No. 2009-286048 discloses a self-scanning light source head, which includes a substrate, surface-emitting semiconductor lasers arranged in an array on the substrate, arranged on the substrate, and used as the A thyristor is a switching...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/042H01S5/062G03G15/04G03G15/32
CPCH01S5/0261H01S5/0428H01S5/06216H01S5/06226H01S5/18313H01S5/2232H01S5/4031H01S5/423H01S5/3095H01S5/02345H01L33/00H01S5/042H01S5/068H01S5/06817H01S5/06825H01S5/183H01S5/3013H01S5/32H01S5/323H01S5/4025H01S5/42
Inventor 近藤崇
Owner FUJIFILM BUSINESS INNOVATION CORP