CN202676982U

CN202676982U - LED (Light Emitting Diode) cold/hot light source film viewer

Info

Publication number: CN202676982U
Application number: CN2012203063780U
Authority: CN
Inventors: 沈明奎; 沈耀程
Original assignee: WUJIANG HYPERD NDT-MATERIAL CO LTD
Current assignee: WUJIANG HYPERD NDT-MATERIAL CO LTD
Priority date: 2012-06-28
Filing date: 2012-06-28
Publication date: 2013-01-16
Anticipated expiration: 2022-06-28

Abstract

The utility model discloses an LED (Light Emitting Diode) cold/hot light source film viewer. The LED cold/hot light source film viewer comprises a case, a cooling fan, an LED cold light source, a hot light source lamp and a circuit board, wherein the cooling fan, the LED cold light source and the hot light source lamp are arranged on the side wall of the case. The circuit board is arranged in the case and is used for controlling the LED cold light source and the hot light source lamp. According to the LED cold/hot light source film viewer disclosed by the utility model, by combining light sources of two kinds (the cold light source and a hot light source) together, the LED (Light Emitting Diode) cold/hot light source film viewer is convenient to use and the trouble of simultaneously using two film viewers is solved. The LED (Light Emitting Diode) cold/hot light source film viewer is also high in brightness. An LED new light source is adopted instead of a fluorescent tube. Thus, not only is the brightness of the light source uniform, stepless and adjustable, but also the brightness of a cold light source observing screen is up to 78,000 cd/m<2> (about 240,000Lux) and is doubly increased.

Description

The hot and cold light source viewbox of LED

Technical field

The utility model relates to the hot and cold light source viewbox of a kind of LED.

Background technology

According to the requirement of JB/T4730.2-2005 standard blackness, blackness reaches more than 4.3.Because domestic viewbox great majority adopt the cold light source manufacturing, domestic cold light source high-high brightness all is difficult to break through 37,680 cd/m ² (about 120,000Lux), blackness value is a bottleneck below 3.5 so observe the egative film viewbox of high blackness, because the photographic density major part of every day use is in the 1.6D-2.6D scope, so adopt film cold light source viewing lamp to meet the demands.Because the development of technology and the raising of standard, blackness value also require to improve, be difficult to observe with cold light source at present greater than the egative film of 4.0D.Simultaneously domestic viewbox adopts the fluorescent tube manufacturing, because frequent the switching, the life-span of fluorescent tube is very short, and brightness descends very fast.

The utility model content

The purpose of this utility model provides a kind of brightness height and the long hot and cold light source viewbox of LED of life-span.

For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of LED is cold, the thermal light source viewbox, it comprises casing, be arranged on LED cold light source and thermal light source lamp on the chassis sidewall, be arranged on the circuit board that is used for control LED cold light source and thermal light source lamp in the casing, be printed with the electronic circuit control module on the described circuit board, AC power is converted to the first power module and the second source module of constant voltage dc source, the logarithm dimming controlling module that is connected with the first power module circuitry phase, the LED cold light source that is connected with logarithm dimming controlling module circuitry phase, the thermal light source lamp that is connected with second source module circuitry phase, control the first power module and second source module manually/foot-operated control module, the radiating module that is used for heat dissipation for circuit board.

The LED cold light source is the flat point of density light source of LED, and the light source cell of LED cold light source directly is welded on the aluminium sheet.

Totally 440～460 of described light source cells, its minutes three, row was evenly distributed on the aluminium sheet.

Described casing is made by aluminium alloy and steel plate.

Described thermal light source lamp is the kicker light lamp.

The beneficial effects of the utility model are: the utility model adopts two types light source (cold light source and thermal light source) to combine, and is easy to use, solved the trouble of using simultaneously two viewboxs, and brightness is high; Change fluorescent tube into the LED new light sources, make the brightness of cold light source film viewing screen reach 78,000 cd/m ² (about 240,000Lux), be doubled.

Description of drawings

Accompanying drawing 1 is for utilizing structural representation of the present utility model;

Accompanying drawing 2 is the schematic diagram of circuit board;

Wherein: 1, casing; 2, LED cold light source; 3, thermal light source lamp.

Embodiment

Below in conjunction with accompanying drawing the utility model is done following detailed description the in detail: the hot and cold light source viewbox of a kind of LED, it comprises casing 1 that aluminium alloy and steel plate make, be arranged on LED cold light source 2 and thermal light source lamp 3 on casing 1 sidewall, be arranged on the circuit board that is used for controlling LED cold light source 2 and thermal light source lamp 3 in the casing 1.

The first power module that be printed with the electronic circuit control module on the described circuit board, AC power is converted to constant voltage dc source be connected with the second source module logarithm dimming controlling module that is connected with the first power module circuitry phase, the LED cold light source that is connected with logarithm dimming controlling module circuitry phase, the thermal light source lamp that is connected with second source module circuitry phase, control the first power module and second source module manually/foot-operated control module, be used for the radiating module of heat dissipation for circuit board.(because circuit block is that therefore not to repeat here for prior art).

LED cold light source 2 is the flat point of density light source of LED, and the light source cell of LED cold light source directly is welded on the aluminium sheet.Totally 450 of described light source cells, its minutes three, row was evenly distributed on the aluminium sheet.

Described thermal light source lamp 3 is the kicker light lamp.

To sum up, the utlity model has following advantage:

1, aluminium alloy and armor Plate, good looking appearance;

2, cold light source adopts the novel flat point of density light source of LED, divides three groups 450 LED lamp light sources are installed, and is directly welded in heat-dissipating aluminium plate, solves the requirement of heat radiation and light source uniformity coefficient.

3, cold light source and thermal light source combination, it is convenient to allow viewbox use, and the thermal light source viewbox that need not to be equipped with high brightness is observed high blackness egative film.

4, the logarithm stepless dimming of led light source, the variation of brightness is more even when making light modulation.

Above-described embodiment only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with technique can understand content of the present utility model and according to this enforcement, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model spirit change or modify, and all should be encompassed within the protection domain of the present utility model.

Claims

1. a LED is cold, the thermal light source viewbox, it is characterized in that: it comprises casing (1), be arranged on LED cold light source (2) and thermal light source lamp (3) on casing (1) sidewall, be arranged on the circuit board that is used for control LED cold light source (2) and thermal light source lamp (3) in the casing (1), be printed with the electronic circuit control module on the described circuit board, AC power is converted to the first power module and the second source module of constant voltage dc source, the logarithm dimming controlling module that is connected with the first power module circuitry phase, the LED cold light source (2) that is connected with logarithm dimming controlling module circuitry phase, the thermal light source lamp (3) that is connected with second source module circuitry phase, control the first power module and second source module manually/foot-operated control module, the radiating module that is used for heat dissipation for circuit board.

2. the hot and cold light source viewbox of LED according to claim 1, it is characterized in that: LED cold light source (2) is the flat point of density light source of LED, and the light source cell of LED cold light source directly is welded on the aluminium sheet.

3. the hot and cold light source viewbox of LED according to claim 2 is characterized in that: totally 440～460 of described light source cells, its minutes three, row was evenly distributed on the aluminium sheet.

4. the hot and cold light source viewbox of LED according to claim 1, it is characterized in that: described casing (1) is made by aluminium alloy and steel plate.

5. the hot and cold light source viewbox of LED according to claim 1, it is characterized in that: described thermal light source lamp (3) is the kicker light lamp.