A warm and cool dual light driving circuit
By designing a dual-light driving circuit with front and rear flashes and optimizing current control using flash drivers and MOSFET circuits, the problem of dual-color temperature lighting for high-end mobile phone photography was solved, achieving a simple and reliable dual-color temperature light control effect.
Patent Information
- Application Number
- CN202520290043.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-02-21
AI Technical Summary
Existing technology cannot meet the needs of high-end mobile phones for dual-color temperature lighting when taking pictures, especially the dual-color temperature effect of front and rear flashes that cannot be achieved through two controllable current sources.
Design a dual-light driving circuit for front and rear flashing, using LED pins and control pins of the flash driver to control the front and rear dual-color temperature lights respectively, and optimize current control through field-effect transistor circuit to achieve simple logic control.
It enables simultaneous control of the front and rear dual-color temperature lamps with a single driver. The circuit is simple and reliable, the logic control is convenient, and the best supplementary lighting effect is achieved.
Smart Images
Figure CN223613504U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a drive circuit of a flash lamp, especially a cold and warm double lamp drive circuit of front and back flashing. BACKGROUND
[0002] The current high-end mobile phone will increase the cold and warm double color temperature light compensation on the photographing effect, and this needs a cold color lamp to cooperate with a warm color lamp, forms a best photographing color temperature. UTILITY MODEL CONTENTS
[0003] In order to solve the above problems, the utility model provides a cold and warm double lamp drive circuit of front and back flashing, and the specific technical scheme is:
[0004] A cold and warm double lamp drive circuit of front and back flashing, including: flash lamp driver, LED 3 is used as front cold color lamp, and with LED 1 pin and CONTRL_4 pin of the flash lamp driver electric connection, LED 4 is used as front warm color lamp, and with LED 2 pin and CONTRL_3 pin of the flash lamp driver electric connection, LED 5 is used as front cold color lamp, and with LED 1 pin and CONTRL_2 pin of the flash lamp driver electric connection, LED 6 is used as front warm color lamp, and with LED 2 pin and CONTRL_1 pin of the flash lamp driver electric connection, wherein, the LED 1 pin is used to control the LED 3 and the LED 5, the LED 2 pin is used to control the LED 5 and the LED 6, and the LED 3, the LED 4, the LED 5 and the LED 6 are opened simultaneously through the CONTRL_1 pin, the CONTRL_2 pin, the CONTRL_3 pin and the CONTRL_4 pin control.
[0005] Preferably, the flash lamp driver includes AW36515FCR.
[0006] Preferably, it further includes field effect transistor circuit, the field effect transistor circuit is arranged between the LED 3 and the CONTRL_4 pin, between the LED 4 and the CONTRL_3 pin, between the LED 5 and the CONTRL_2 pin and between the LED 6 and the CONTRL_1 pin respectively.
[0007] Compared with the prior art, the utility model has the following beneficial effects:
[0008] The cold and warm double lamp driving circuit with front and rear flashing provided by the utility model controls front and rear double color temperature lamps through LED1 and LED2 of the flash lamp driver, and can control the simultaneous opening of the front and rear double color temperature lamps through the CONTRL pin, and the circuit is simple, reliable and convenient for logic control. BRIEF DESCRIPTION OF DRAWINGS
[0009] Figure 1 It is the circuit schematic diagram of the application. DETAILED DESCRIPTION
[0010] The utility model will be further described with reference to the drawings.
[0011] As Figure 1 shown, a cold and warm double lamp driving circuit with front and rear flashing, including flash lamp driver MA1, LED3, LED4, LED5 and LED6, LED3 is used as front cold color lamp, and is connected with LED1 pin and CONTRL_4 pin of the flash lamp driver; LED4 is used as front warm color lamp, and is connected with LED2 pin and CONTRL_3 pin of the flash lamp driver; LED5 is used as front cold color lamp, and is connected with LED1 pin and CONTRL_2 pin of the flash lamp driver; LED6 is used as front warm color lamp, and is connected with LED2 pin and CONTRL_1 pin of the flash lamp driver; LED1 pin is used for controlling LED3 and LED5, and LED2 pin is used for controlling LED5 and LED6; when LED3, LED4, LED5 and LED6 are opened simultaneously, they are controlled through CONTRL_1 pin, CONTRL_2 pin, CONTRL_3 pin and CONTRL_4 pin.
[0012] The front double color temperature lamp is composed of two lamps LED3 and LED4, one cold color temperature LED3 and one warm color temperature LED4, and the rear double color temperature is composed of two lamps LED5 and LED6, one cold color temperature LED5 and one warm color temperature LED6. The front double color temperature lamp can be controlled by LED1 and LED2 of the driving chip respectively. Simultaneous opening also needs the cooperation of CONTRL_1-4 of CPU end. The rear double color temperature is equivalent to the front double color temperature. The current of the cold and warm color temperature lamp can be set respectively through LED1 and LED2 of the flash lamp driver, and through the debugging current, a best light supplementing effect can be achieved.
[0013] In order to improve the current of driving LED, field effect transistor circuit is further included, which is respectively arranged between LED3 and CONTRL_4 pin, between LED4 and CONTRL_3 pin, between LED5 and CONTRL_2 pin and between LED6 and CONTRL_1 pin. The field effect transistor circuit includes an NPN triode as a gate driver. Q1 to Q3 are field effect transistors, which are used as amplifiers, and the gate (G) controls the switching state of the FET. When the gate voltage reaches a certain value, the FET is turned on. The current flows out from the drain (D), and the current flows into the source (S). The NPN triode is used as a gate driver to control the gate voltage of the FET. The base receives the input signal, and controls the conduction of the triode. The collector is connected to the gate of the FET, and the gate voltage of the FET is controlled by the conduction or cut-off of the triode. The emitter is grounded. The input signal is applied to the base of the NPN triode through a resistor, and the conduction of the triode is controlled. When the NPN triode is turned on, the collector current flows, and the gate voltage of the FET is pulled low, so that the FET is turned on. When the NPN triode is cut off, the gate voltage of the FET is raised, and the FET is cut off.
[0014] The control logic is as follows:
[0015] LED1 LED2 CONTRL_1 CONTRL_2 CONTRL_3 CONTRL_4 Front dual color temperature Output Output 0 0 1 1 Back dual color temperature Output Output 1 1 0 0
[0016] The technical principles of the utility model are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the utility model, and cannot be interpreted as limiting the protection scope of the utility model in any way. Based on the explanations here, other specific embodiments of the utility model can be conceived by those skilled in the art without creative labor, and these embodiments will all fall within the protection scope of the claims of the utility model.
Claims
1. A flash-to-warm dual lamp driving circuit, characterized by, Comprise: a flash driver; LED3, used as a front cold color lamp, and electrically connected with the LED1 pin and the CONTRL_4 pin of the flash driver; LED4, used as a front warm color lamp, and electrically connected with the LED2 pin and the CONTRL_3 pin of the flash driver; LED5, used as a front cold color lamp, and electrically connected with the LED1 pin and the CONTRL_2 pin of the flash driver; LED6, used as a front warm color lamp, and electrically connected with the LED2 pin and the CONTRL_1 pin of the flash driver; wherein the LED1 pin is used to control the LED3 and the LED5, and the LED2 pin is used to control the LED5 and the LED6; and the CONTRL_1 pin, the CONTRL_2 pin, the CONTRL_3 pin and the CONTRL_4 pin are used to control when the LED3, the LED4, the LED5 and the LED6 are turned on at the same time.
2. The flash-to-warm dual lamp driving circuit according to claim 1, characterized in that, The flash driver comprises AW36515FCR.
3. The flash-to-warm dual lamp driving circuit according to claim 1, characterized in that, Further comprising field effect transistor circuits, which are respectively arranged between the LED3 and the CONTRL_4 pin, between the LED4 and the CONTRL_3 pin, between the LED5 and the CONTRL_2 pin, and between the LED6 and the CONTRL_1 pin.