Outdoor lamp capable of changing colors

An outdoor lamp capable of changing colors includes a support member, a lamp holder disposed on the support member, and an LED light module disposed in the lamp holder. The LED light module includes at least one PCBA (printed circuit board assembly) arrayed with a plurality of LED groups. Each of the LED groups is composed of at least one white/warm white LED and at least one RGB LED adjacent to each other. Each of the white/warm white LED and the RGB LED can emit light simultaneously or individually. When the RGB LED emits light to change colors, the luminous flux of the entire LED light module can be improved by the aid of the white/warm white LED, and a color gradient effect is generated.

FIELD OF THE INVENTION

The present invention relates to an LED outdoor lamp, and more particularly to an outdoor lamp capable of changing colors. The outdoor lamp comprises an LED light module. The LED light module includes at least one PCBA (printed circuit board assembly) arrayed with a plurality of LED groups. Each of the LED groups is composed of at least one white/warm white LED and at least one RGB LED adjacent to each other. The luminous flux of the entire LED light module is improved through the white/warm white LED to assist the RGB LED.

BACKGROUND OF THE INVENTION

Light emitting diodes (LEDs) are widely used in various types of lighting fixtures due to the characters of energy saving, light weight, and compactness. In recent years, high-power LED, white/warm white LED and RGB LED technology have been developed, gradually replacing traditional light-emitting devices. LEDs have been applied to industry, home lighting, traffic roads, etc.

In recent years, most of outdoor lamps used in gardens, homes, outdoor restaurants or outdoor recreation sites use RGB LEDs as a light-emitting module, namely, color-changing outdoor lamps. During operation, different colors can be changed through RGB LEDs to generate different visual effects.

The above-mentioned color-changing outdoor lamp has the effect of changing colors. The RGB LED uses the principle of mixing red, green and blue to change colors. When the RGB LED is driven with a high luminous flux to emit colored light, the color is not obvious. Only when the luminous flux is low, the RGB LED can generate a more obvious color-changing effect.

In other words, the luminous flux must be low for the outdoor lamp with RGB LEDs to generate a more obvious color-changing effect. This is the shortcoming of the color-changing outdoor lamp. Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to solve these problems.

SUMMARY OF THE INVENTION

In view of the above problems, the primary object of the present invention is to provide an outdoor lamp capable of changing colors. The outdoor lamp not only solves the problem that the luminous flux of the outdoor lamp is not enough but also allows the outdoor lamp to have a color gradient effect when changing colors.

In order to achieve the aforesaid object, the outdoor lamp capable of changing colors of the present invention comprises a support member, a lamp holder disposed on the support member, and an LED light module disposed in the lamp holder. The LED light module includes at least one PCBA (printed circuit board assembly) arrayed with a plurality of LED groups. The PCBA is electrically connected to an LED driver. Each of the LED groups is composed of at least one white/warm white LED and at least one RGB LED adjacent to each other. The LED driver drives and controls each of the white/warm white LED and the RGB LED to emit light simultaneously or individually. When the LED driver drives and controls the RGB LED to emit light in a fixed color manner or in a color-changing manner, the luminous flux of the LED light module is increased through the white light/warm white light emitted by the white/warm white LED, and the LED light module generates a color gradient effect.

Compared with the prior art, in the outdoor lamp of the present invention, each of the LED groups of the LED light module is composed of at least one white/warm white LED and at least one RGB LED adjacent to each other. When the RGB LED emits light in a fixed color manner or in a color-changing manner, the luminous flux of the LED light module is increased through the white light/warm white light emitted by the white/warm white LED, thereby overcoming the problem of dusk because the luminous flux of the conventional outdoor lamp is not enough. With the configuration of the number of white/warm white LEDs and RGB LEDs, the colored light is presented in a gradient effect.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

As shown inFIG. 1andFIG. 2, an outdoor lamp capable of changing colors in accordance with the present invention comprises a support member10, a lamp holder20disposed on the support member10, and an LED light module30disposed in the lamp holder20. The LED light module30includes at least one PCBA (printed circuit board assembly)50arrayed with a plurality of LED groups40. The PCBA50is electrically connected to an LED driver60and driven by the LED driver60, enabling the plurality of LED groups40on the PCBA50to emit light.

As shown in the figures, the support member10has a bottom portion in the form of a rod to be fixed to the ground. The lamp holder20includes a light-pervious lampshade21disposed on the top of the support member10and a cover22that covers the top of the light-pervious lampshade21. In practice, the lamp holder20may be mounted to a bracket (not shown) on a wall or hung on a building or other objects, without using the support member10.

In order to save energy and facilitate installation, the top of the cover22is provided with a solar panel23, so that the LED light module30does not need to be connected with a power cable. However, the LED light module30may be connected with a power cable (not shown) to meet the needs of the installation site. In addition, the LED driver60is disposed between the top of the light-pervious lampshade21and the cover22in a hidden manner to avoid affecting the appearance.

The PCBA50of the LED light module30is disposed in the light-pervious lampshade21and located at the center of the light-pervious lampshade21or above the light-pervious lampshade21. When the PCBA50is implemented, the PCBA50is made into a suitable shape corresponding to the shape and internal space of a different lamp holder20, such as a ring, a strip, a disk, a triangle, or a non-geometry. As shown inFIG. 1andFIG. 2, the PCBA50is in the form of a strip, as an example.

As shown inFIG. 3toFIG. 5, the LED light module30may include two PCBAs, defined as a first PCBA50alocated at the center of the light-pervious lampshade21and a second PCBA50bdisposed above the first PCBA50a. Both the first PCBA50aand the second PCBA50bmay be simultaneously installed, or one of them may be selected in conjunction with the design of the outdoor lamp. In addition, as shown inFIG. 3toFIG. 5, the first PCBA50ais in the form of a strip and the second PCBA50bis in the form of a ring, as an example. But, the actual implementation of the first PCBA50aand the second PCBA50bcan be respectively formed into suitable shapes according to the shapes and the internal spaces of different lamp holders.

Wherein, the first PCBA50ais installed at the center of the light-pervious lampshade21of the lamp holder20in an upright manner. Both sides of the first PCBA50aare provided with a plurality of LED groups40a. When the LED groups40aon both sides of the first PCBA50aemit light, the light is scattered 360 degrees around the entire light-pervious lampshade21through a light guide structure in the light-pervious lampshade21. Alternatively, a light guide pillar51is provided between the outside of the first PCBA50aand the light-pervious lampshade21. The light is scattered 360-degree through the light guide pillar51. The light guide structure or the light guide pillar51in the light-pervious lampshade21is a general technique and won't be further described hereinafter.

As shown in the figures, the second PCBA50bof the LED light module30is transversely disposed under the cover22of the lamp holder20, that is, above the first PCBA50a. A plurality of LED groups40bare disposed on the underside of the second PCBA50bto emit light toward the light-pervious lampshade21. If the second PCBA50bis separately provided, a plurality of LED groups40bare provided on both sides of the second PCBA50b, enabling both sides of the second PCBA50bto emit light. In cooperation with the two embodiments of the PCBA, the implementation of the LED groups of the present invention is as follows:

As shown inFIG. 4, the first PCBA50ais in the form of a strip, and the plurality of LED groups40aare arranged in a rectangular array. Wherein, each LED group40ais composed of at least one white/warm white LED41aand at least one RGB LED42aadjacent to each other. The LED driver can drive and control each of the white/warm white LED41aand the RGB LED42ato emit light simultaneously or individually. When the RGB LED42aemits light in a fixed color manner or in a color-changing manner, the luminous flux of the entire LED light module30is increased through the white light/warm white light emitted by each white/warm white LED41a.

It is worth mentioning that the number of at least one white/warm white LED41aand at least one RGB LED42aof the LED group40amay be configured in different numbers depending on the needs of the lighting effect. For example, as shown inFIG. 4, the white/warm white LEDs41aand the RGB LEDs42aof the LED groups40aare arranged from the left to the right of the figure: two white/warm white LEDs41ain cooperation with one RGB LED42a, one white/warm white LED41ain cooperation with one RGB LED42a, one white/warm white LED41ain cooperation with two RGB LEDs42a, etc., or many white/warm white LEDs41ain cooperation with many RGB LEDs42a, thereby enabling the colored light emitted by the entire LED light module30to have a color gradient effect.

As shown inFIG. 5, the LED groups40bon the second PCBA50bare arranged in an annular array. Each LED group40bis composed of at least one white/warm white LED41band at least one RGB LED42badjacent to each other. As for the configuration of the white/warm white LED41band the RGB LED42b, the RGB LED42bcan be configured to increase in number from the outside to the inside. The luminous flux of the entire LED light module30can be increased through the white light/warm white light emitted by each white/warm white LED41b. Through the change in number, the colored light emitted by the entire LED light module30may have a color gradient effect.

For example, the LED groups40barranged in an annular array as shown in the figure, the number of white/warm white LEDs41bis one or more from the outside to the inside, but the number of RGB LEDs42bgradually increases from the outside to the inside. Through the control of the LED driver, it is possible to generate a color gradient effect in which the color gradually becomes richer from the outside to the inside.