CZ2011185A3 - Discharge lamp or LED - Google Patents

Abstract

The electrode-discharge lamp supplied by the electronic ballast, which includes a memory circuit controlled by the control circuit, is provided with an accompanying memory (8) containing at least the lamp type (2). The accompanying memory (8) is connected to the ballast memory (6) of the ballast (1) when the lamp is connected to the ballast (1). The accompanying memory (8) includes the desired value of at least one of the following lamp operating parameters: glow time, glow frequency, or glow current, start frequency, transition frequency profile over its lifetime.

Description

Field of technology

The invention relates to a lamp or LED powered by an electronic ballast, which includes a power supply circuit controlled by a control circuit provided with a memory.

State of the art

Modern electronic ballasts supply the lamps with a higher frequency current, without the need for a transformer, which otherwise entails energy losses. The phase shift between current and voltage at the input to the electronic ballast is almost zero. Well-known electronic ballasts extend the life of the lamp up to 8000 hours. Another advantage of powering by means of an electronic ballast is that the frequent switching on and off of the lamps affects their service life much less than in the case of electromagnetic sources. In addition, this power supply allows you to continuously change the electrical input to the lamp.

However, even lamps powered by modern electronic ballasts have a limited life. This also applies to LEDs, especially those that emit in the ultraviolet range. They have a lifespan of only 300 hours and their radiation intensity drops to 70%. The service life of a light source generally depends on its type and its operating conditions, such as temperature, number of on and off cycles, mains voltage fluctuations, supply frequency, etc. From both an environmental and a practical point of view, it is desirable that the service life light sources was as long as possible. The cost of replacing a non-functional light source often exceeds its purchase price several times over. These costs must include the administration associated with the replacement of light sources, travel costs and the work of service technicians.

The developers have made considerable efforts to extend the life and optimize the operating conditions of the lamps. Construction of control devices resp. The electronic ballasts of said light sources and the method of their operation are described in a number of patents.

U.S. Pat. No. 6,501,235 discloses an electronic ballast compatible with various types of lamps. The ballast has a control circuit connected to the lamp power supply, the control circuit comprising a memory in which the desired operating parameters are stored.

- 2 different types of lamps. Initially, the detection circuit prompts the supply circuit to supply current to the lamp. It then detects the voltage that is characteristic of the type of lamp, and thus identifies the lamp. The control circuit then ensures that the supply circuit supplies current to the lamp with parameters corresponding to the given type. The goal, ie to extend the life of the lamp, is achieved by setting such power supply parameters that correspond to the currently connected lamp type.

The reliability of the lamp type information that the electronic ballast obtains from the lamp in the described arrangement depends on several factors, such as the current state of the lamp and the design of the identification software. The transmitted information contains only information about the lamp type, while data on operating time-invariant parameters suitable for a given lamp type must be stored in advance in the ballast memory, from where they are transmitted to the control circuit based on the lamp type information. If a lamp whose operating parameters are not stored in memory is connected, the lamp will not light.

It is an object of the present invention to provide a lamp or LED that reduces the disadvantages of known electronic ballast powered luminaires.

The essence of the invention

This task is solved by a lamp or LED powered by an electronic ballast, which includes a power supply circuit controlled by a control circuit equipped with a memory. The essence of the lamp resp. LEDs is that it is provided with an accompanying memory containing at least an indication of the type of lamp or LED, the accompanying memory being connected to the memory of the ballast when the lamp is connected to the ballast.

In a preferred embodiment, where the ballast control circuit is also provided with a clock, the accompanying memory of the lamp or LED contains the desired value of at least one of the following operating parameters of the lamp during its lifetime: glow time, glow frequency or glow current, start frequency, transient frequency profile, operating power of the lamp and operating frequency, minimum and maximum dimming frequencies.

In such a case, the accompanying memory of the LED preferably contains the desired course of the current passing through the diode or the course of the voltage across the diode throughout its lifetime.

Preferably, the accompanying memory is adapted to register the time for which the lamp resp. LED in operation.

Overview of pictures in the drawing

The invention will be further elucidated with the aid of the drawing, in which FIG. 1 is a block diagram of a lamp according to the invention provided with an accompanying memory and connected to an electronic ballast.

Examples of embodiments of the invention

The electronic ballast 1 of the lamp 2 according to FIG. this for the entire life of the luminaire, as determined experimentally for the given type of luminaire. These parameters are: glow time, glow frequency or glow current, starting frequency, transient frequency profile, lamp operating power and operating frequency, minimum and maximum dimming frequencies. The electronic ballast 1 includes a clock 7 for transmitting information at which point in its service life the lamp 2 is located. The lamp 2 is provided with an accompanying memory 8, in which only information about the type of the lamp 2 can be stored, but in a preferred embodiment the desired waveforms of the operating parameters of the lamp 2 are stored in it, as it was for the given type. luminaires determined experimentally. The accompanying memory 8 of the lamp 2 is connected to the memory 6 of the ballast 1 when the lamp 2 is connected to the ballast 1.

When the lamp 2 is connected to the ballast 1, the contents of the auxiliary memory 8 are read into the memory 6 of the electronic ballast 1 and the control circuit 5 selects and sets the corresponding value of the respective parameter on the output interface 4 according to the current time information transmitted by the clock 7.

- 4 The auxiliary memory 8 of the lamp 2 is adapted to register the time for which the lamp (2) is in operation. If the lamp 2 is disconnected from one ballast 1 and connected to another, also provided with a memory 6, only those parameter waveforms which correspond to the time remaining by the lamp 2 until the end of its service life are read from the accompanying memory 8 of the lamp 2 to the memory 6 of the other ballast 1. .

PATENT CLAIMS PV2011-185

Claims (2)

PATENT CLAIMS PV2011-185 Electrode glow lamp powered by an electronic ballast, comprising a supply circuit controlled by a memory control circuit, characterized in that it is provided with an accompanying memory (8) containing at least information about the type of lamp (2), the accompanying memory (8) being when the lamp is connected to the ballast (1), connected to the memory (6) of the ballast (1) and wherein the accompanying memory (8) contains the desired value of at least one of the following lamp operating parameters: glow time, glow frequency or glow current, start frequency, transient frequency profile over its lifetime. λ Lamp according to claims 2 to 4, characterized in that its accompanying memory (8) is adapted to register the time for which the lamp (2) resp. LED in operation.