TWI416033B - Full-color led table lamp - Google Patents

Abstract

This invention presents an adjustable full color LED desk lamp design, including with a programmable RGB LED lighting unit and a structure of desk lamp. RGB LED lighting unit consists of multiple RGB LED, constant current driver and connector socket for connecting to the control board located in the desk lamp base. Control board has a microcontroller and the necessary peripherals, such as button or knob, to control the lighting unit. Desk lamp structure has a base for containing control board and power unit, a lampshade for embedding lighting unit, and links for adjusting lampshade position. Lampshade can contain RGB LED lighting unit. Links are hollow for passing through the wires to connect the lighting unit and control board. Button and knob are installed on the base. Push the button will switch the default colors cycling and adjust the knob can generate more rich desired colors. By this invention, more possible applications will be obtained.

Description

Full color LED table lamp

The invention belongs to the field of illumination design and control of desktop lamps, and the lamp row composed of RGB LED and constant current chip is used as the illumination unit of the lamp, and the integration of the microcontroller, the operation interface and the programming is achieved. The design of full-color lighting table lamp can enhance the function and application of table lamp.

The desk lamp is an indispensable lighting fixture on the desk. The illuminator has evolved from common incandescent bulbs, fluorescent tubes and halogen tubes to LED desk lamps with energy saving and low carbon. With the innovative design of various appearances and the appropriate positional arrangement, the desk lamps are often not just table lamps, but the value they can derive exceeds the stereotype of the lamps. The main function of the desk lamp with LED lamp as the illuminator is to adjust the brightness of the monochromatic light source. For example, the Republic of China I306142, M374027 patent is designed with a plurality of LED lighting table lamp device. Another example is the Republic of China I310446 patent, which uses a separate blue LED and red LED for simple lamp color adjustment. These conventional lamp designs are designed to meet the basic needs of lighting. However, for the application of special needs, its application is limited because it can only produce a single-color light source. For example, different light colors can be used to view different images to achieve different sensory effects, highlighting the function of specific elements. At this time, a desk lamp that sells a single color light source cannot achieve the desired function. How to design a table lamp that can produce a variety of light colors to meet various color requirements is the main goal of the present invention.

In order to improve the limitation of the single color function of the desk lamp in the conventional art, the object of the present invention is to design a desk lamp with RGB LED as the light-emitting unit, by modulating the different powers of the red, green and blue primary colors of the RGB LED lighting unit. Output control to achieve a variety of color changes in the lighting function.

In order to achieve the above object, the design of the present invention mainly includes a lamp row composed of a plurality of RGB LEDs and a lamp lamp structure capable of carrying a lamp row. The lamp row is composed of a plurality of RGB LEDs and a constant current driving chip, and a necessary connector is reserved for connecting the main control circuit board of the base of the lamp structure by a cable. The main control circuit board mainly comprises a microcontroller chip, and accepts an operation interface such as a button and a knob to perform full color illumination modulation control of the lamp row. The lamp structure mainly comprises a base for accommodating the main control circuit board and the power supply circuit, a lamp cover for accommodating the lamp row, and a connecting rod capable of rotating and adjusting the position of the lamp cover. The configuration of the lampshade can accommodate the lamp row and provide space for heat dissipation. The connecting rod can be used for signal lines and power lines to connect the lamp row and the main control circuit board. The base is provided with a button and a rotating operation interface, and the preset lamp color can be displayed cyclically by the operation of the button, and the knob can be adjusted to control any color customized by the user. The main control board mainly detects the operation signal of the button or the knob, and transmits the required command to the constant current chip in serial communication according to the detected signal to perform the required lamp color and brightness control.

In order to further understand the technical features and effects of the present invention, the present invention will be further described below in conjunction with the embodiments.

As shown in FIG. 1 and FIG. 2, it is a perspective view and an exploded view of a full-color LED desk lamp of the present invention, which mainly includes an RGB LED lamp row 10, a lamp cover 20, a lamp post 30, 40, and a lamp holder 50. Main control circuit board 60 and power supply unit 70. The lamp row 10 is a light-emitting unit composed of an RGB LED and a constant current chip, and the two ends are provided with screw holes 104 (see FIG. 3) and are fixed to the lamp cover 20. The lampshade 20 can be any shape-designed casing, and one end is provided with a corresponding screw hole 灯 and a lamp post assembled with the lamp post. The lamp pole is moderately bent in two sections, the upper pole 30 and the lower pole 40. The hollow rod body is provided for the wire to be connected to connect the electrical signals of the lamp row 10 and the main control circuit board 60. The lamp holder 50 mainly provides a space for assembling the main control circuit board 60 and the power supply unit 60. The socket is provided with a through hole 501 for the light pole 40, and through holes 502 and 503 for the operation button 602 and the knob 603 to pass through.

A detailed view of the RGB LED strip 10 is shown in FIGS. 3(a) and (b), and includes a plurality of RGB LEDs 101, a constant current driving wafer 102, and a signal connecting terminal 103. The circuit block diagram of the lamp row is shown in Figure 4. The RGB LED 101 is designed by the ADL-5050RGB in the embodiment of the invention, and the LEDs of the R, G and B colors are integrally packaged therein, and the gray scales of the LEDs of the R, G and B colors are respectively adjusted, and the LEDs can be changed. Show the desired color. The function of modulating the gray value of the RGB pin in the embodiment of the present invention is achieved by the DM632 wafer. The DM632 has 16 output channels, each with 16-bit pulse width modulation (PWM) turn-on power, and three channels to control the color change of an RGB LED. In the embodiment of the present invention, a lamp row design of 45 RGB LEDs is taken as an example, and 9 DM632 wafers are required. The nine DM632s are connected in series, and the control commands are transmitted in the SPI mode serial communication protocol, that is, the driving circuit constituting the lamp row.

In particular, the RGB LED driving circuit designed by the present invention, each color of each RGB LED can be modulated by a constant current chip, which is different from the conventional method in which a plurality of RGB LEDs are connected in parallel, using the same Drive circuit. In the technique, since the characteristics of each RGB LED are not uniform, the uniformity of brightness cannot be ensured.

Figure 5 is a simplified diagram of the operation of the DM632 chip. The DCK is a serial communication clock. The gray level control command for each channel is 16 bits, and the 16 channels require a total of 256 bits. Therefore, when the color of each RGB LED is changed, According to the RGB color code table, the color code value of each light color is stored in the memory in advance, and the 256-bit command is sequentially transmitted from the DAI, and then the LAT latch command is issued, and then the Light color control of each RGB LED. The 9 DM632s are connected in series, and the required color control commands are 9×256 bits. The DAI pin of the first DM632 receives the serial command from the main control board, and the shift register sequentially shifts the bit of the input input. After the first shift register is full, the DAO pin will be The instruction moves into the second DM632, and so on until the data transfer of the 9 DM632s is completed. REXT of Figure 5 is the setting of the LED output current, connecting a current limiting resistor to ground. SOMODE/GCK is a serial transmission mode setting or an external clock setting. The present invention is not used. The clock required to transmit the serial command directly uses the SPI serial module of the microcontroller chip on the main control board. Provide the clock.

As shown in FIG. 4, the connector terminal mainly includes a chip power supply 5V, a red LED 4.3V, a blue-green LED 5V three-group power supply, and a DM632 chip receives a control signal line from the main control circuit board. Circuit diagram of main control circuit board The intent is shown in Figure 6, the operating interface includes buttons and knobs. The button is mainly built with a common fixed light color, which can cycle through the built-in light color switch. In order to reduce the number of use of the button, when the pressing time exceeds the predetermined number of seconds, the function is switched to the adjustment of the brightness. The adjustment method is described in the software flowchart later. For example, in the embodiment of the present invention, if the preset common lamp color is 12 colors, the command of each RGB LED is 3×16 bits, and the design of 9 DM632s is taken as an example, and each DM632 controls 5 RGB LEDs. (If one channel is not used), the operation of transmitting the 3×16 bit command 5 times and 1×16 bit 1 time is repeated 9 times to control the switching of the lamp color.

Although each channel of the DM632 has a 16-bit PWM modulation capability, in the present invention, only 8 bits can be used, and the other 8 bits are used for brightness adjustment. Therefore, 12 preset lights are taken as examples, {Peach Red, Bright Pink, Blue, Ribbon Blue, Red, Rose, Deep Blue, Bright Purple, Green, Sea Blue, Jasper, Purple}, which corresponds to 8 The bit RGB color code is {0xFF33FF, 0xFF99FF, 0x33FFFF, 0x99FF99, 0xFF0000, 0xFF0099, 0x0000FF, 0x6600FF, 0x00FF00, 0x00FFCC, 0x00CC66, 0x9900CC}, so the 12-color RGB color code array command can be defined as follows.

Const char R_CODE[12] ={0xFF,0xFF,0x33,0x99,0xFF,0xFF,0x00,0x66,0x00,0x00,0x00,0x99}; const char G_CODE[12] ={0x33,0x99,0xFF,0xFF,0x00 , 0x00, 0x00, 0x00, 0xFF0xFF, 0xCC, 0x00}; const char B_CODE[12] = {0xFF, 0xFF, 0xFF, 0x99, 0x00, 0x99, 0xFF, 0xFF, 0x000xCC, 0x66, 0xCC}; The program will read the corresponding color code array in sequence, and output the light to the DM632 to control the color of the light. The flow of control will be described later.

The lamp holder of the invention is further provided with an operation knob, which is mainly used for quickly selecting the desired display lamp color. According to the color code color comparison table of Table 1, there are 128 sets of color code tables built therein, and the rotation of the knob is divided into 128. The levels are read by the A/D module of the microcontroller and converted into corresponding color code levels for display color operation. The brightness control operation is started after the pressing time of the button exceeds a predetermined length. As described above, the DM632 chip has a PWM resolution of 16 bits, and can be used in the present invention in an insufficient bit mode, such as M bits and M < 16. In the embodiment of the present invention, M=8 is used, and only the 8-bit element is used for color modulation. In this case, the color that can be modulated by the RGB three colors is 2 ^3×M =2 ^3×8 or 2 ²⁴ colors, which is sufficient for satisfying Various applications. The effect of the unused 8-bit brightness adjustment is as follows: As shown in Figure 7, the gray level of each channel of the DM632 is controlled to 16 bits. If the maximum brightness is to be obtained, the 8-bit should be located in the most significant bit. The element (as shown in Figure 7(a)) is the leftmost 8-bit, while the other 8 bits are set to 0. However, if this 8-bit is started from the second most significant bit (as shown in Fig. 7(b)), the output power at this time is reduced to half. If 8 bits are placed in the least significant bit as shown in Fig. 7(i), the display brightness is only 256 of that of Fig. 7(a). Therefore, when the pressing time exceeds a certain length, for example, 2 seconds, the program will rotate the currently displayed color code value, change the output power of each channel, and immediately adjust the brightness, and the user observes the change of the brightness. Immediately release the button, the desk lamp maintains the desired brightness to achieve brightness adjustment.

FIG. 8 is a flow chart of the main control circuit board lamp control program, and the #1~#3 block is the input/output setting of the basic IO pin of the main control chip 601, the SPI serial communication mode specification, and the initial display color setting. The invention communicates in an 8-bit SPI mode. Therefore, after the CODE array to be displayed is read and processed, it must be divided into 9×32 times and transmitted through the SPI pin (ie, 9×32×8 bits are transmitted). The SPI transmission loops indicated in #4~#8 are responsible for this function. When the command is transmitted, the #8 block sends the latch signal, as shown in the LAT of Figure 5 or Figure 6, where the display control of the RGB LED is the responsibility of the DM632 chip. The #9 block detects whether there is a button press. If there is no button operation, it enters the knob detection until the button or knob signal is detected, and the button or knob command is used. The function of #10~#14 is button detection. If it is a short button, the index value of the color array is directly added by one to switch to the new color display. On the other hand, if the pressing time exceeds a predetermined length, for example, 2 seconds, the brightness weight is adjusted, and the brightness is instantly switched to observe the change in brightness. If the button is not released, the program will continue to cycle the brightness. After the button is released, enter the waiting loop of the button and the knob, that is, the steps #10, #17, #18.

If the knob has an operation, #19 reads the A/D value of the lamp color level, and the #20 step reads the corresponding lamp color array value, and then uses the #21~#23 SPI mode. Transfer the light color command to the DM632. Then enter the waiting loop of the button and the knob, the same as the steps #10, #17, #18 above.

In this case, the voltage signal generated by the knob is changed to calculate the output color code value. The short pressing operation of the button can be used as a cyclic display of the pre-stored lamp color. In combination with the insufficient bit of the DM632 PWM modulation, the button can be used to adjust the brightness of the corresponding lamp color. The level of modulation of the brightness depends on the use of the PWM insufficient bits. Referring to the seventh figure M=8, the brightness level is (16-M)+1, and the total brightness level is (16-M)+2.

The processing of the brightness of the light is to sequentially process the read color array according to the bit format of FIG. 7, and output the processed data to the DM632 in real time to adjust the brightness of the RGB LED. As long as the button is not released, the color of the light will change from the brightest to the least bright 9 brightness levels according to the format of Figure 7. The user can observe the brightness to the appropriate value to release the button, and the background light can be maintained at the set brightness display.

In order to make the brightness of the three primary colors of the RGB LED as uniform as possible to fully adjust the desired color of the lamp, the power supply design of the present invention has three sets of power sources, and the functional block diagram thereof is as shown in FIG. In Figure 9, the power supply provides 5V/7A 35W power supply. After the voltage regulator circuit, it generates power supply of 4.3V/3A red LED and 5V/3A blue-green LED power supply. The power supply of the main control board is rated at 5V/1A. .

In summary, the case is in full use of the industry, and the relevant products and approved patent announcements in the market have not seen the same technical features as the essence of the present invention, and are also legal and novel. Patent application requirements.提出 Submit a patent application in accordance with the law, and ask your review board to give the patent as soon as possible to ensure the rights and interests of the applicant. However, the present invention is not limited to the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and any equivalent changes or modifications made in accordance with the spirit of the present invention are still covered by the scope of the present invention. in.

10. . . RGB LED light row

101. . . RGB LED

102. . . Constant current chip

103. . . Connector

104. . . Screw hole

20. . . lampshade

201. . . Screw hole

30. . . Upper pole

40. . . Lower pole

50. . . Lamp holder

501. . . Light pole through hole

502. . . Button through hole

503. . . Knob through hole

60. . . Main control board

601. . . Master chip

602. . . Button

603. . . Knob

70. . . Power Supplier

Figure 1 is a three-dimensional diagram of a full-color multi-function table lamp

Figure 2 Schematic diagram of the components of the full-color multi-function table lamp

Figure 3 Schematic diagram of the light row

Figure 4 Schematic diagram of the lamp row

Figure 5 DM 632 constant current chip block diagram

Figure 6 Schematic diagram of the main control board

Figure 7 Schematic diagram of brightness control of table lamp

Figure 8 Software control flow chart of full color multi-function table lamp

Figure 9 Schematic diagram of power supply

10. . . RGB LED light row

20. . . lampshade

201. . . Screw hole

30. . . Upper pole

40. . . Lower pole

50. . . Lamp holder

501. . . Light pole through hole

502. . . Button through hole

503. . . Knob through hole

60. . . Main control board

602. . . Button

603. . . Knob

70. . . Power Supplier

Claims (9)

A full-color LED table lamp comprises: a lamp structure composed of a lamp cover, a lamp pole and a base; a main control circuit board provided with a microcontroller, an operation button and a knob, and a power and signal connector; an LED lamp row The RGB LED has R, G, and B anode ends connected to the supply power source, and the cathode end is connected to the constant current chip output channel with the pulse width modulation output; The control pin of the constant current chip is connected to the corresponding control pin of the main control circuit board; a power supply unit provides the power required for the main control circuit board and the light bar. For example, the full-color LED table lamp according to item 1 of the patent application scope, wherein the lampshade of the lamp structure has a long strip shape, the middle section is slightly recessed, and the lamp row is screwed and fixed; the long strip-shaped lampshade has a side view in a side view. The two-eared two-eared ear is provided with a screw hole and a light pole; the light pole is a hollow pipe body for the wire to be pierced, and is slightly bent into two upper and lower sections; the base is a hollow body of moderate weight, and the hollow space The main control circuit board and the power supply unit are accommodated, and the upper surface of the seat body is provided with three perforations for respectively arranging the rod body, the button and the knob. For example, the full-color LED desk lamp described in claim 1 is characterized in that the constant current wafer on the LED lamp row has a plurality of output channels, and each of the three channels controls one RGB LED, and each channel has a maximum of 16-bit resolution. The pulse width modulation function modulates the different duty cycles of each channel to achieve the hues of the RGB LEDs. For example, the full-color LED desk lamp described in claim 3, wherein the pulse width modulation bit of each channel of the constant current chip can be set in a less than bit manner, that is, the used color code command is set to M bit. And M<16, the value of the remaining 16-M bits is set to zero. For example, in the full-color LED desk lamp described in claim 1, wherein the main control circuit board receives the signals of the button and the knob, and each time the button is pressed, the main control chip reads the built-in light color code command and transmits it to the fixed The current control chip cyclically displays the corresponding lamp color output according to the preset number of color code commands; when the knob is rotated, the main control chip reads the voltage value of the knob and converts it into a corresponding lamp color code command to output the command to the command The current chip performs more switching control of the light color. For example, the full-color LED desk lamp described in claim 5, wherein the lamp color code command is stored in the array memory form in the program memory of the microcontroller, the number of commonly used lamp colors for button switching and the number of lamp colors adjusted by the knob can be arbitrarily set. The maximum number is 2 ^{48. When the} channel pulse width modulation is insufficient, the maximum number is 2 ^{3 × M} , which depends on the pulse width modulation resolution used by the current chip channel. The full-color LED desk lamp of claim 5, wherein when the button is pressed for more than a predetermined length, the desk lamp enters a brightness adjustment mode, wherein the M-bit lamp color code value of the most significant bit is sequentially highest The effective bit is adjusted to the least significant bit direction, and the remaining 16-M bits are complemented by 0, and then the lamp color code value is transmitted to the constant current chip in tandem mode to modulate the brightness of the RGB LED. For example, in the full-color LED desk lamp described in claim 7, wherein the serial communication mode is preferably SPI mode. For example, in the full-color LED table lamp described in the seventh paragraph of the patent application, after the table lamp enters the brightness adjustment mode, it depends on the number of PWM modulation insufficient bits. If the M-bit PWM modulation is used, the brightness modulation level is (16-M) +1, including total off, the brightness level is (16-M) + 2.