CN-115968081-B - Input device with backlight function and backlight color adjusting method thereof

CN115968081BCN 115968081 BCN115968081 BCN 115968081BCN-115968081-B

Abstract

The invention provides an input device with a backlight function and a backlight color adjusting method thereof, wherein the input device with the backlight function comprises: the color light emitting device comprises a shell, a plurality of color light emitting elements, a control module and a photosensitive coupling element. The control module selectively supplies power to at least two of the color light emitting elements through the power supply circuit, and enables the chromaticity value of the mixed white light beam of the color light emitting elements to be consistent with that of the white light beam, so that the brightness value of the mixed white light beam of the color light emitting elements is consistent with that of the white light beam.

Inventors

PAN DINGXIANG
LIN HUILING

Assignees

致伸科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20211012

Claims (11)

1. A backlight color adjusting method is applied to an input device with a plurality of color light emitting elements, wherein each color light emitting element comprises a red light emitting unit, a green light emitting unit, a blue light emitting unit and a white light emitting unit, and comprises the following steps: (A) Selectively providing power to at least two of the plurality of color light emitting elements; (B) Independently driving the white light emitting units of the selected color light emitting elements by a control module to enable the white light emitting units to generate a first white light beam; (C) Measuring a first color value and a first brightness value of each first white light beam respectively; (D) According to the first chromaticity value, the red light-emitting units, the green light-emitting units and the blue light-emitting units generate a first mixed white light beam; (E) Measuring a first mixed chromaticity value and a first mixed brightness value of each first mixed white light beam respectively; (F) The first mixed chromaticity value of each color light-emitting element is consistent with the first chromaticity value, and a first adjustment parameter corresponding to the red light-emitting unit, the green light-emitting unit and the blue light-emitting unit is obtained, wherein when the difference of x coordinate and y coordinate of the coordinates of the first mixed chromaticity value and the first chromaticity value in the CIE 1931 color space is respectively smaller than 0.01, the first mixed chromaticity value is judged to be consistent with the first chromaticity value; (G) Driving each selected color light emitting element according to each first mixed brightness value to enable the white light emitting unit to generate a second white light beam, or driving each selected color light emitting element according to each first brightness value to enable the red light emitting unit, the green light emitting unit and the blue light emitting unit to generate a second mixed white light beam; (H) Measuring a second luminance value of each second white light beam or a second mixed luminance value of each second mixed white light beam respectively; (I) Making the second brightness value of each color light-emitting element consistent with the first mixed brightness value, and obtaining a second adjustment parameter corresponding to the white light-emitting unit, or making the second mixed brightness value of each color light-emitting element consistent with the first brightness value, and obtaining a third adjustment parameter corresponding to the red light-emitting unit, the green light-emitting unit and the blue light-emitting unit, wherein when the difference between the second brightness value and the first mixed brightness value is less than 5% or between 5% and 10%, the second brightness value is judged to be consistent with the first mixed brightness value, or when the difference between the second mixed brightness value and the first brightness value is less than 5% or between 5% and 10%, the second mixed brightness value is judged to be consistent with the first brightness value, and (J) And performing a gray scale color adjustment process according to the first adjustment parameter and the second adjustment parameter or the first adjustment parameter and the third adjustment parameter.
2. The backlight color adjusting method as claimed in claim 1, wherein the step (D) comprises: (D1) According to the first chrominance value, adjusting a current value corresponding to the red light-emitting unit to enable the red light-emitting unit to generate a first red light beam; (D2) Adjusting the current value corresponding to the green light emitting unit according to the first color value to make the green light emitting unit generate a first green light beam, and (D3) According to the first color value, the current value corresponding to the blue light-emitting unit is adjusted to enable the blue light-emitting unit to generate a first blue light beam.
3. The backlight color adjusting method as claimed in claim 1, wherein the step (F) comprises: (F1) Judging whether the first mixed chromaticity value corresponding to the first mixed white light beam is consistent with the first chromaticity value, if so, proceeding to the next step, otherwise, returning to the step (D), and (F2) The current value corresponding to the red light-emitting unit, the current value corresponding to the green light-emitting unit and the current value corresponding to the blue light-emitting unit are obtained as the first adjustment parameters.
4. The backlight color adjusting method as defined in claim 1, wherein in the step (G), the current value corresponding to the white light emitting unit is adjusted according to the first mixed brightness value, so that the white light emitting unit generates the second white light beam.
5. The backlight color adjusting method as claimed in claim 1, wherein the step (G) comprises: (G1) According to the first brightness value, adjusting the current value corresponding to the red light-emitting unit to enable the red light-emitting unit to generate a second red light beam; (G2) Adjusting the current value corresponding to the green light emitting unit according to the first brightness value to make the green light emitting unit generate a second green light beam, and (G3) According to the first brightness value, the current value corresponding to the blue light-emitting unit is adjusted to enable the blue light-emitting unit to generate a second blue light beam.
6. The backlight color adjusting method as claimed in claim 1, wherein the step (I) comprises: (I1) Judging whether a second brightness value corresponding to the second white light beam is consistent with the first mixed brightness value, if so, proceeding to the next step, otherwise, returning to the step (G), and (I2) And acquiring a current value corresponding to the white light emitting unit as the second adjustment parameter.
7. The backlight color adjusting method as claimed in claim 1, wherein the step (I) comprises: (I1) Judging whether a second mixed brightness value corresponding to the second mixed white light beam is consistent with the first brightness value, if so, proceeding to the next step, otherwise, returning to the step (G), and (I2) And acquiring a current value corresponding to the red light-emitting unit, a current value corresponding to the green light-emitting unit and a current value corresponding to the blue light-emitting unit as the third adjustment parameters.
8. An input device with backlight function, comprising: A housing; A plurality of color light emitting elements disposed in the housing, each of the color light emitting elements comprising: a red light-emitting unit for generating a red light beam and projecting the red light beam to the housing; a green light-emitting unit for generating a green light beam and projecting the green light beam to the housing; A blue light emitting unit for generating a blue light beam and projecting the blue light beam to the housing, and A white light emitting unit for generating a white light beam and projecting the white light beam to the housing; a control module disposed in the housing and electrically connected to the color light emitting elements, and having a power supply circuit, and A photosensitive coupling element for sensing chromaticity and brightness of the red, green, blue and white light beams; the control module selectively supplies power to at least two of the color light emitting elements through the power supply circuit, respectively adjusts current values corresponding to the red light emitting units, the green light emitting units, the blue light emitting units and the white light emitting units to enable chromaticity values of a mixed white light beam formed by the red light beams, the green light beams and the blue light beams to be consistent with the chromaticity values of the white light beams, wherein when the difference between the chromaticity values of the mixed white light beam and the chromaticity values of the white light beams in the x coordinate difference and the y coordinate difference of coordinates in the CIE 1931 color space is smaller than 0.01, the chromaticity values of the mixed white light beam are judged to be consistent with the chromaticity values of the white light beams, and the luminance values of the mixed white light beams are enabled to be consistent with the luminance values of the white light beams, wherein when the difference between the luminance values of the mixed white light beam and the luminance values of the white light beams is smaller than 5% or between 5% and 10%, the luminance values of the mixed white light beam are judged to be consistent with the luminance values of the white light beams.
9. The backlight input device as claimed in claim 8, wherein the control module obtains a current value corresponding to each of the red light emitting units, a current value corresponding to each of the green light emitting units, and a current value corresponding to each of the blue light emitting units as a first adjustment parameter for each of the red light emitting units, each of the green light emitting units, and each of the blue light emitting units when the chromaticity value of each of the mixed white light beams is identical to the chromaticity value of each of the white light beams.
10. The backlight input device as claimed in claim 8, wherein the control module obtains current values corresponding to the white light emitting units as a second adjustment parameter of the white light emitting units when the brightness value of the white light beam is adjusted to be consistent with the brightness value of the mixed white light beam.
11. The backlight input device as claimed in claim 8, wherein the control module obtains current values corresponding to the red light emitting units, current values corresponding to the green light emitting units and current values corresponding to the blue light emitting units as a third adjustment parameter for the red light emitting units, the green light emitting units and the blue light emitting units when the luminance values of the mixed white light beams are adjusted to be consistent with the luminance values of the white light beams.

Description

Input device with backlight function and backlight color adjusting method thereof Technical Field The present invention relates to an input device, and more particularly, to an input device with a backlight function. Background With the evolution of technology, computer devices have become a necessary tool for most households or workplaces. The host computer is controlled by an input device such as a screen, a keyboard, a mouse, etc. In order to improve the functionality and practicality of the input device, many input devices have a backlight function, so that the input device can form different luminous visual effects, and a user can use the input device in a dim environment. Furthermore, the backlight function can also be used as an input prompt, so that a user can operate more conveniently. The input device with backlight function is generally configured with a color light emitting element composed of a red light emitting unit, a green light emitting unit and a blue light emitting unit, or a color light emitting element composed of a red light emitting unit, a green light emitting unit, a blue light emitting unit and a white light emitting unit, and can form mixed light beams through the red, green and blue light emitting units or the red, green, blue and white light emitting units. In general, color light emitting elements composed of red, green, blue, and white light emitting units consume less power, and are therefore also used in input devices. However, compared with color light emitting elements having only red, green and blue light emitting units, color light emitting elements having red, green, blue and white light emitting units are prone to errors in luminance and chromaticity after performing a gray scale tone process on the mixed light beam. In the prior art, such as in taiwan patent publication No. I696409, a gray-scale adjustment procedure is proposed. However, since the existing technology can only perform the gray-scale adjustment procedure on all the color light emitting elements at the same time, the gray-scale adjustment cannot be performed on the respective color light emitting elements, and the power consumption of the entire backlight module cannot be further reduced. Therefore, how to provide an input device with a backlight function, which can save power, is a technical problem to be solved by the invention. Disclosure of Invention The main objective of the present invention is to provide an input device with a backlight function and a backlight color adjusting method thereof, and adjust the backlight color by dividing power supply, thereby achieving the technical effect of saving power. In order to achieve the above-mentioned object, the present invention provides a backlight color adjustment method applied to an input device having a plurality of color light emitting elements, each of the color light emitting elements including a red light emitting unit, a green light emitting unit, a blue light emitting unit and a white light emitting unit, comprising the steps of: (A) Selectively providing power to at least two of the color light emitting elements; (B) Driving each selected color light emitting element to enable each white light emitting unit to generate a first white light beam; (C) Measuring a first chromaticity value and a first brightness value of each first white light beam respectively; (D) According to the first color value, the red light-emitting units, the green light-emitting units and the blue light-emitting units generate first mixed white light beams; (E) Measuring a first mixed chromaticity value and a first mixed brightness value of each first mixed white light beam respectively; (F) The first mixed chromaticity value of each color light-emitting element is consistent with the first chromaticity value, and first adjustment parameters corresponding to the red light-emitting unit, the green light-emitting unit and the blue light-emitting unit are obtained; (G) Driving each selected color light emitting element according to each first mixed brightness value to enable the white light emitting unit to generate a second white light beam, or driving each selected color light emitting element according to each first brightness value to enable the red light emitting unit, the green light emitting unit and the blue light emitting unit to generate the second mixed white light beam; (H) Measuring the second luminance value of each second white light beam or the second mixed luminance value of each second mixed white light beam respectively; (I) The second brightness value of each color light-emitting element is consistent with the first mixed brightness value, and a second adjustment parameter corresponding to the white light-emitting unit is obtained, or the second mixed brightness value of each color light-emitting element is consistent with the first brightness value, and a third adjustment parameter corresponding to the red light-emitting unit, the green light-emitting