Light supplement module, light supplement control method and terminal for light supplement module

Patent metadata

Field	Value
Publication number	US-2020375005-A1
Application number	US-201916697698-A
Country	US
Kind code	A1
Filing date	Nov 27, 2019
Priority date	May 21, 2019
Publication date	Nov 26, 2020
Grant date	—

Abstract

The disclosure relates to a light supplement device or module, and a light supplement control method, a terminal, and an apparatus for the light supplement module, and belongs to the technical field of electronic devices. The light supplement module includes a circuit substrate; n Light Emitting Diodes (LED) disposed in an array on the circuit substrate, n being an integer greater than 1, and there being at least two LEDs having different colors; and a light guiding layer disposed on an upper layer of the n LEDs, wherein the LEDs are color LEDs, or the n LEDs constitute a color LED group.

First claim

1 . A light supplement device, comprising:
a circuit substrate; n Light Emitting Diodes (LED) disposed in an array on the circuit substrate, n being an integer greater than 1, and there being at least two LEDs having different colors; and a light guiding layer disposed on an upper layer of the n LEDs, wherein the LEDs are color LEDs, or the n LEDs constitute a color LED group, wherein the circuit substrate is electrically connected to a color temperature control chip, the color temperature control chip is electrically connected to a processor, and the processor is electrically connected to a color temperature sensor, wherein the color temperature sensor is configured to collect data of ambient color temperature, wherein the processor is configured to obtain the data of ambient color temperature, calculate a value of ambient color temperature according to the data of ambient color temperature, and send the value of ambient color temperature to the color temperature control chip, and wherein the color temperature control chip is configured to adjust an overall color temperature of the n LEDs according to the value of ambient color temperature; or wherein the circuit substrate is electrically connected to a color temperature control chip, and the color temperature control chip is electrically connected to a processor, wherein the processor is configured to perform color temperature analysis on a shot preview image to obtain a value of ambient color temperature, and wherein the color temperature control chip is configured to adjust an overall color temperature of the n LEDs according to the value of ambient color temperature.

2 . The light supplement device according to claim 1 , wherein the circuit 0 substrate is electrically connected to a color temperature control chip, and the color temperature control chip is configured to adjust single or overall brightness and/or color temperature of the n LEDs.

3 - 4 . (canceled)

5 . The light supplement device according to claim 1 , wherein the color temperature control chip is configured to adjust the overall color temperature of the n LEDs using a negative feedback mechanism according to the value of ambient color temperature and a reference value of color temperature.

6 . The light supplement device according to claim 1 , wherein the n LEDs disposed in the array comprise: a red LED, a green LED and a blue LED.

7 . The light supplement device according to claim 1 , wherein a red sub-LED, a green sub-LED and a blue sub-LED are packaged in at least one of the n LEDs disposed in the array.

8 . The light supplement device according to claim 2 , wherein each of the LEDs is disposed in parallel with each other, and the color temperature control chip is configured to control brightness of each LED and a color ratio of an overall LED module.

9 . The light supplement device according to claim 1 , further comprising:
a light homogenizing layer, wherein the light homogenizing layer is disposed between the light guiding layer and the n LEDs, or the light homogenizing layer is disposed on an upper layer of the light guiding layer.

10 . The light supplement device according to claim 9 , wherein the light homogenizing layer comprises at least one of a diffusion layer or a light homogenizing lens.

11 . The light supplement device according to claim 1 , wherein an interval of an overall color temperature of the n LEDs comprises: 2000 Kelvin to 7500 Kelvin.

12 . A light supplement control method for a light supplement device, wherein the light supplement device comprises: a circuit substrate; n Light Emitting Diodes (LED) disposed in an array on the circuit substrate, n being an integer greater than 1, and there being at least two LEDs having different colors; a light guiding layer disposed on an upper layer of the n LEDs, wherein the LEDs are color LEDs, or the n LEDs constitute a color LED group, the method comprising:
obtaining an ambient parameter of current shooting ambient; and adjusting overall brightness and/or overall color temperature of the n LEDs according to the ambient parameter.

13 . The method according to claim 12 , wherein obtaining the ambient parameter of the current shooting ambient comprises:
collecting data of ambient color temperature; and calculating a value of ambient color temperature according to the data of ambient color temperature for adjusting the overall color temperature of the n LEDs according to the value of ambient color temperature.

14 . The method according to claim 12 , wherein obtaining the ambient parameter of the current shooting ambient comprises:
performing color temperature analysis on a shot preview image to obtain a value of ambient color temperature for adjusting the overall color temperature of the n LEDs according to the value of ambient color temperature and an expected shooting effect.

15 . The method according to claim 13 , wherein adjusting the overall color temperature of the n LEDs comprises:
adjusting the overall color temperature of the n LEDs using a negative feedback mechanism according to the value of ambient color temperature and a reference value of color temperature.

16 . The method according to claim 15 , wherein adjusting the overall color temperature of the n LEDs using the negative feedback mechanism according to the value of ambient color temperature and the reference value of color temperature comprises:
determining the reference value of color temperature according to a white balance requirement; determining, according to a difference between the value of ambient color temperature and the reference value of color temperature, a target group PWM signal from at least two sets of control parameters according to the negative feedback mechanism, each set of the control parameters comprising n PWM signals used for controlling the overall color temperature of the n LEDs to be a target color temperature, the n PWM signals corresponding to the n LEDs; and using the n PWM signals in the target group PWM signal to control the n LEDs respectively, wherein the n PWM signals comprise a current signal and/or a voltage signal.

17 - 23 . (canceled)

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

• Gu Jianglin
• Bai Jian
• Chen Lin
• Wei Shujun
• Yen Chiafu

Classifications

• H10W90/00

  Package configurations · CPC title

• H04N23/56

  provided with illuminating means · CPC title

• H04N23/71

  Circuitry for evaluating the brightness variation · CPC title

• G03B15/03 Primary

  Combinations of cameras with lighting apparatus; Flash units · CPC title

• H04N23/74 Primary

  by influencing the scene brightness using illuminating means · CPC title