LED table lamp for reading-writing visual task

Abstract

The invention relates to an LED lamp, and specifically relates to LED table lamp for a reading-writing visual task. The LED table lamp comprises an LED lamp panel (6), a reflecting plate (7), a USB plug power wire (3) with rated current of 2A, and a vertical rod (2), wherein an included angle alpha formed between the LED lamp panel (6) and the reflecting plate (7) is more than 86 degrees and less than 118 degrees; the included angle beta formed between the straight transmission light of LED lamp beads (6a) and the level is more than 30 degrees and less than 48 degrees; the LED lamp panel (6) and the reflecting plate (7) are 25 to 50cm in length; the vertical rod (2) is 30 to 50cm in height H; the reflecting plate (7) is 8 to 28mm in width; the LED lamp beads (6a) are connected in parallel; all LED lamp beads (6a) on the LED lamp panel (6) have the same power; the quantity of the LED lamp beads (6a) is the quotient obtained by dividing the current of 2A by the rated current of single LED lamp bead (6a); the LED lamp beads (6a) have the same spacing and are provided with three power and configuration modes. According to the ED table lamp for the reading-writing visual task, a 5V USB power supply is used for supplying power; the national standard requirements of Requirements on Performances of Table Lamp for Reading-writing Task can be met; the structure is simple; both time and force can be saved during assembling.

Description

[0001] Field [0002] The invention relates to an LED lamp, in particular to an LED desk lamp for reading, writing and visual operations powered by a 5V USB power supply (safe extra low voltage). Background technique [0003] The LED desk lamps of the prior art can only be used as general lighting or auxiliary lighting, and cannot be used as lighting for reading and writing operations, that is, the main photometric properties such as illuminance and illuminance uniformity cannot meet the national standard "Performance Requirements for Reading and Writing Operation Desk Lamps" (GB / T 9473-2008) related requirements. [0004] Although some LED desk lamps can meet the requirements of reading and writing lighting, the illumination range is small, the illumination uniformity is not good, and the power is relatively large, far exceeding 10W. [0005] At present, most of the known LED desk lamps are powered by 220V AC grid power supply, requiring a special power supply circuit; or a...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a kind of LED reading and writing visual work lamp powered by 5V USB power supply (safety extra low voltage) to make up for the deficiencies of the above technologies, and to solve the reading and writing operation with the commonly used mobile phone charger / power adapter power supply It can solve the problem of poor heat dissipation of the LED lamp head and excessive brightness attenuation. It can meet the relevant requirements of the national standard "Performance Requirements for Reading and Writing Work Desk Lamps" (GB / T9473-2008), and the structure is simple and assembly is cheap. time-saving desk lamp

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