TWI431396B - Electronic device providing adjustable flash - Google Patents

Description

Provide adjustable fill light electronic device

The invention relates to an electronic device for providing adjustable light filling, in particular to an electronic device for simultaneously providing an adjustable light filling by using a plurality of light emitting diode elements.

With the development of technology, the functions of portable electronic devices such as smart phones, personal digital assistants (PDAs), notebook computers or tablets are becoming more and more diverse. Regardless of the main functions of each type of portable electronic device, most of them provide camera functions for taking photos and video clips, so they are often used as digital cameras/cameras.

In the process of photography or photography, if the natural light of the surrounding environment is insufficient, it is necessary to use a supplemental artificial light source to improve the image effect. Among the portable electronic devices with camera functions, xenon flash lamps and white light emitting diodes (LEDs) are the most common auxiliary artificial light sources. Xenon flash lamps provide a high-intensity line source with a color temperature close to about 5500°K to 6000°K, so they are widely used in dedicated digital cameras. However, the high cost of Xenon flash lamps and the high power consumption required for charging flashes can significantly shorten the standby time of portable electronic devices.

In contrast, the white light emitting diode fill light has the advantages of easy manufacture, long life, high photoelectric conversion efficiency and low power consumption, and thus is particularly suitable for use in a portable electronic device. In the prior art, the white light emitting diode fill light applied to the portable electronic device adopts a low light wavelength design, and the blue light emitting diode component is matched with the yellow fluorescent powder to provide a white light source in a light mixing manner. The performance in red and green is weak. When performing photo-taking or photography, the target is easily whitened, which affects the overall color performance of the picture. On the other hand, the prior art white light-emitting diode fill light can only provide an artificial light source with a fixed color temperature, and does not allow the user to adjust the color temperature of the fill light according to his preference.

The invention provides an adjustable light-filling electronic device, comprising a camera module for capturing images; a multi-color warm fill lamp for providing light when the camera module operates, comprising a first light source And a second light source for providing light having a wavelength within a second predetermined range; a multi-channel driving circuit for generating the signal according to a control signal a first driving current and a second driving current of the second light source; a controller for generating the control signal according to a fill mode corresponding to a user command; and a user interface Used to receive the user instruction.

FIG. 1 is a functional block diagram of an electronic device 100 with an adjustable fill light imaging function according to the present invention. The electronic device 100 includes a power supply 10, a camera module 20, a multi-color warm fill light 30, a drive circuit 40, a controller 50, a storage unit 60, and a user interface 70.

The power supply 10 can be a built-in battery, a built-in battery, or provided by an external utility to supply the voltage required to operate the various components within the electronic device 100.

The camera module 20 can include components such as a lens, a CCD/CMOS sensor, a memory, and a processor, and can be used to take a photo or a video clip when the electronic device 100 enters the camera mode.

The multi-color warm fill light 30 can include a red light module 22, a green light module 24, and a blue light module 26: the red light module 22 can include a plurality of red LED elements R for providing a wavelength range of approximately The green light module 24 can include a plurality of green LED elements G for providing light with a wavelength range of about 500-600 nm; the blue light module 26 can include a plurality of blue LED elements B for To provide light with a wavelength range of approximately 380-500 nm.

The driving circuit 40 uses a multi-channel design to drive the multi-color temperature fill light 30, and the driving current I _R required for the operation of the red light module 22 and the green light module 24 are respectively operated according to the control signal CTL transmitted from the controller 50. The required drive current I _G and the drive current I _B required for the operation of the blue LED module 26 .

The storage unit 60 stores various preset fill modes of the electronic device 100 in the image capturing mode, for example:

(1) Sunlight mode: or high color temperature mode, corresponding to the D65 light source defined by the standard light source, color temperature 6500 °K, color coordinates (0.31, 0.33);

(2) Indoor mode: or medium color temperature mode, corresponding to the CWF light source defined by the standard light source, color temperature 4000 °K, color coordinates (0.38, 0.38);

(3) Night mode: or low color temperature mode, corresponding to the A light source defined by the standard light source, color temperature 3000 °K, color coordinates (0.4, 0.435);

(4) Custom mode: The color temperature can be determined by the user.

When the user selects a specific fill mode in the sunlight mode, the indoor mode or the night mode through the user interface 70, the controller 50 controls the drive circuit 40 according to the corresponding setting of the memory of the storage unit 60, and adjusts the drive current I _{R .} The values of I _G and I _{B are} such that the light provided by the multi-color warm fill lamp 30 can have a color temperature corresponding to the selected fill mode.

When the user selects the custom mode through the user interface 70 and inputs a specific setting, the controller 50 controls the driving circuit 40 according to the specific setting, and adjusts the values of the driving currents I _R , I _G , and I _{B to} make the multi-color temperature fill light. The light provided by the lamp 30 can have a color temperature corresponding to the custom mode.

FIG. 2 is a schematic diagram of an electronic device 100 in an embodiment of the present invention. FIG. 2 shows the appearance of the casing 90 of the electronic device 100. The camera lens 20, the light hole of the multi-color warm fill lamp 30 and the user interface 70 may be disposed on the front surface of the casing 90. The power supply 10, the drive circuit 40, the controller 50, and the storage unit 60 may be disposed inside the casing 90 and thus are not shown in FIG.

The front lens of the camera module 20 and the multi-color warm fill light 30 are usually arranged nearby to achieve a better light filling effect. The user interface 70 can be a graphical user interface (GUI) including a touch/non-touch screen 42 and an input device 44 (specific function keys, numeric keys, alphabet keys, or arrow keys). Etc.), or only include a touch screen 42.

In the embodiment shown in FIG. 2, in the camera mode, the electronic device 100 can display the selectable preset fill mode on the screen 42 in a menu mode, and the user can directly select or pass through the touch mode. Input device 44 is used to select a particular fill mode.

If the user selects a system preset mode such as a sunlight mode, an indoor mode, or a night mode, the electronic device 100 directly applies the corresponding setting of the memory of the storage unit 60; if the user selects the custom mode, the electronic device 100 can display another on the screen 42. An advanced menu is displayed to allow the user to enter parameters such as color temperature or color coordinates.

3A and 3B are schematic diagrams showing an advanced menu mode after selecting a custom mode. In the embodiment shown in FIG. 3A, the electronic device 100 allows the user to input or adjust the value of the color coordinates on the screen 42. In the embodiment shown in FIG. 3B, the electronic device 100 can display a CIE chromaticity diagram on the screen 42. The CIE chromaticity diagram is a color coordinate system developed by the Commission Internationale del'clairage. The trichromatic coefficients ER, EG and EB are used to represent the color of red, green and blue light in a certain pixel. The proportion in the middle. The sum of ER, EG and EB is 1, and the CIE chromaticity diagram uses ER as the horizontal axis and EG as the vertical axis, which can represent the color space formed by the three primary colors of red, green and blue. In the CIE chromaticity diagram, the three vertices are the three primary colors of red, green, and blue with the largest chroma, and the central part is the white with the smallest chroma. The user can select the setting of the custom mode in the CIE chromaticity diagram by moving the arrow cursor displayed on the screen 42. At the same time, the screen 42 can also display (1) the sunlight mode, (2) the indoor mode, and (3) the night mode in the corresponding position of the CIE chromaticity diagram for the user's reference.

In the present invention, the electronic device 100 can display the preset fill mode in the camera mode in different manners on the user interface 70, and the user can touch or use a specific function key, a numeric key, an alphabet key or a direction key, etc. To select a specific fill mode or enter a custom mode setting. The drawings 2, 3A and 3B are only examples of the invention and do not limit the scope of the invention.

The electronic device 100 of the present invention can provide an adjustable multi-color temperature fill light function in the image capturing mode, so that the user can adjust the color temperature of the fill light according to his preference, so that the images captured in different environments reach the user's desire. Effect. On the other hand, the multicolor temperature fill lamp 30 of the electronic device 100 of the present invention employs a red LED element, a blue LED element, and a green LED element, has low energy consumption, and has the ability to continuously emit light. In one application, the multi-color temperature fill light 30 of the electronic device 100 of the present invention can also be used as a flashlight or a reading light; in another application, the electronic device 100 of the present invention can display the user on the user interface 70 in the image capturing mode. The instant image, that is, the mirror function, is provided, and the multi-color warm fill light 30 can be used as a makeup light.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

10‧‧‧Power supply

20‧‧‧ camera module

22‧‧‧Red light module

24‧‧‧Green Light Module

26‧‧‧Blu-ray module

30‧‧‧Multicolor temperature fill light

40‧‧‧Drive circuit

42‧‧‧ screen

44‧‧‧ Input device

50‧‧‧ Controller

60‧‧‧ storage unit

70‧‧‧User interface

90‧‧‧Shell

100‧‧‧Electronic devices

R‧‧‧Red LED components

G‧‧‧Green LED components

B‧‧‧Blue LED components

FIG. 1 is a functional block diagram of an electronic device with an adjustable fill light imaging function according to the present invention.

FIG. 2 is a schematic diagram of an electronic device according to an embodiment of the present invention.

3A and 3B are schematic diagrams showing an advanced menu mode of the electronic device of the present invention after the custom mode is selected.

10. . . power supply

20. . . Camera module

twenty two. . . Red light module

twenty four. . . Green light module

26. . . Blu-ray module

30. . . Multi-color warm fill light

40. . . Drive circuit

50. . . Controller

60. . . Storage unit

70. . . user interface

100. . . Electronic device

R. . . Red LED component

G. . . Green LED component

B. . . Blue LED component

Claims (8)

An electronic device for providing an adjustable fill light, comprising: a camera module for capturing images; and a multi-color warm fill lamp for providing light when the camera module operates, comprising: a first light source, And a second light source for providing light having a wavelength within a second predetermined range; a multi-channel driving circuit for generating the first signal according to a control signal a first driving current of the light source and a second driving current of the second light source; a controller for generating the control signal according to a fill mode corresponding to a user command; and a user interface, Used to receive the user command; wherein when the multi-color warm fill lamp is used to provide light, the controller generates a plurality of different images according to a plurality of different fill modes corresponding to a plurality of different user commands. Controlling the signal, and the multi-channel driving circuit generates a plurality of different first driving currents and/or a plurality of second driving currents according to the plurality of different control signals. The electronic device of claim 1, wherein the first predetermined range and the second predetermined range are two of 380-500 nm, 500-600 nm, and 600-780 nm. The electronic device of claim 1, wherein the first light source comprises a first type of light emitting diode (LED) component, and the second light source comprises a second type of light emitting diode component And the first type of light emitting diode element and the second type of light emitting diode element are two of a red light emitting diode element, a green light emitting diode element and a blue light emitting diode element. . The electronic device of claim 1, wherein the multicolor temperature fill light further comprises: a third light source for providing light having a wavelength within a third predetermined range, wherein the first predetermined range to the third predetermined The range is one of 380~500nm, 500~600nm and 600~780nm. The electronic device of claim 4, wherein the first light source comprises a red light emitting diode element, the second light source comprises a green light emitting diode element, and the third light source comprises a Blue light emitting diode component. The electronic device of claim 1, further comprising: a storage unit for storing a setting related to the fill mode. The electronic device of claim 6, wherein the setting is related to a predetermined color temperature of the light provided by the polychromatic warm fill lamp in the fill light mode. The electronic device of claim 7, wherein the multi-channel driving circuit adjusts the values of the first driving current and the second driving current according to the setting.