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Lighting devices and lamps for vehicles

A technology for lighting devices and resistors, applied in lighting devices, signal devices, vehicle components, etc., can solve the problems of miniaturization and low cost (cost), increased heat generation, and increased substrate size, etc., to achieve the suppression of light emission The effect of volume reduction

Active Publication Date: 2018-09-07
TOSHIBA LIGHTING & TECH CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, if a constant-voltage element or the like is used, a new constant-voltage element or the like is required, or the heat generation increases due to a decrease in circuit efficiency (the ratio of the applied voltage to the input voltage to the light-emitting diode), or the substrate size (size) increases. Big
[0011] Therefore, miniaturization or cost reduction required for vehicle lighting devices may not be realized.

Method used

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  • Lighting devices and lamps for vehicles
  • Lighting devices and lamps for vehicles
  • Lighting devices and lamps for vehicles

Examples

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Embodiment Construction

[0050] One embodiment of the present invention is a lighting device including a substrate, a light emitting element provided on the substrate, and a resistor provided on the substrate and connected in series to the light emitting element.

[0051] Furthermore, when a halved value of the first voltage is applied to the first circuit in which the light-emitting element and the resistor are connected in series, the voltage ratio of the resistor is less than or equal to that when the first circuit is applied to the first circuit. voltage is 25% of the voltage ratio of the resistor body.

[0052] According to this lighting device, even if the voltage drops, the reduction in the amount of light emitted can be suppressed.

[0053] In this case, in a region where the input voltage is low (when the voltage drops), the amount of light emitted is equal to or higher than that of an incandescent bulb.

[0054] Furthermore, a plurality of the resistors may be provided, and the respective r...

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Abstract

The present invention provides an illuminating device capable of suppressing a decrease in the amount of light emitted even when a voltage drop occurs. A lighting device in an embodiment includes a substrate, a light emitting element provided on the substrate, and a resistor provided on the substrate and connected in series to the light emitting element. Furthermore, when the halved value of the first voltage is applied to the first circuit in which the light-emitting element and the resistor are connected in series, the voltage ratio of the resistor is less than or equal to that when the first circuit is applied to the first circuit. voltage when the voltage ratio of the resistor body.

Description

technical field [0001] Embodiments of the present invention relate to a lighting device. Background technique [0002] In recent years, lighting devices for vehicles (for example, lighting devices for automobiles) using light emitting diodes (Light Emitting Diode, LED) as light sources are actually used instead of incandescent bulbs (filament bulbs). [0003] Illuminating devices using light-emitting diodes as light sources have a long life and low power consumption, so they are expected to replace existing incandescent bulbs. [0004] Here, the vehicle lighting device uses a battery as a power source, but the voltage applied to the lighting device varies. [0005] For example, the operating standard voltage (rated voltage) of an ordinary lighting device for a vehicle is about 13.5V. Voltage changes. [0006] Therefore, in the vehicle lighting device, the operating voltage range (voltage fluctuation range) is determined. For example, the operating voltage range is genera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02H05B44/00
CPCF21S43/14H05B45/10H05B45/00H05B45/18B60Q1/14
Inventor 日野清和
Owner TOSHIBA LIGHTING & TECH CORP
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