Input device with backlight function and backlight color adjustment method thereof

Abstract

This invention provides an input device with backlight function and a method for adjusting the backlight color. The input device with backlight function includes: a housing, multiple colored light-emitting elements, a control module, and a photosensitive coupling element. The control module selectively supplies power to at least two of the colored light-emitting elements through a power supply circuit, and makes the chromaticity value of the mixed white light beam of the colored light-emitting elements consistent with the chromaticity value of the white light beam, and makes the brightness value of the mixed white light beam of the colored light-emitting elements consistent with the brightness value of the white light beam.

Description

Technical Field

[0001] This invention relates to an input device, and more particularly to an input device with a backlight function. Background Technology

[0002] With the evolution of technology, computer devices have become essential tools in most homes and workplaces. Computer hosts are operated through input devices such as screens, keyboards, and mice.

[0003] To enhance the functionality and usability of input devices, many devices incorporate backlighting. This not only allows for various visual lighting effects but also enables users to operate the device even in low-light environments. Furthermore, backlighting can also serve as input prompts, making operation more convenient for users.

[0004] Backlit input devices typically feature colored light-emitting elements composed of red, green, and blue light-emitting units, or red, green, blue, and white light-emitting units. These elements can form a mixed light beam. Generally, colored light-emitting elements composed of red, green, blue, and white light-emitting units consume less power and are therefore more commonly used in input devices. However, compared to colored light-emitting elements with only red, green, and blue light-emitting units, those with red, green, blue, and white light-emitting units are more prone to brightness and chromaticity errors after grayscale adjustment of the mixed light beam.

[0005] In existing technologies, such as Taiwan Patent Publication No. I696409, a grayscale adjustment procedure is proposed. However, since the current technology can only perform grayscale adjustment on all color light-emitting elements at the same time, it is still impossible to perform grayscale adjustment on individual color light-emitting elements separately, and thus cannot further reduce the overall power consumption of the backlight module.

[0006] Therefore, how to provide an input device with backlight function that can save power is the technical problem that this invention aims to solve. Summary of the Invention

[0007] The main objective of this invention is to provide an input device with a backlight function and a method for adjusting the backlight color, which can adjust the backlight color by means of zoned power supply, thereby achieving the technical effect of saving power.

[0008] To achieve the aforementioned objectives, the present invention provides a backlight color adjustment method, applied to an input device having multiple color light-emitting elements, each color light-emitting element including a red light-emitting unit, a green light-emitting unit, a blue light-emitting unit, and a white light-emitting unit, comprising the following steps:

[0009] (A) Selectively supplying power to at least two of the colored light-emitting elements;

[0010] (B) Drive the selected colored light-emitting elements to make each white light-emitting unit produce a first white beam of light;

[0011] (C). Measure the first chromaticity value and the first luminance value of each first white beam;

[0012] (D). Based on each first chromaticity value, each red light-emitting unit, each green light-emitting unit, and each blue light-emitting unit jointly generate a first mixed white beam;

[0013] (E). Measure the first mixed chromaticity value and the first mixed brightness value of each first mixed white beam;

[0014] (F). Make the first mixed chromaticity value of each color light-emitting element consistent with the first chromaticity value, and obtain the first adjustment parameter corresponding to the red light-emitting unit, the green light-emitting unit and the blue light-emitting unit;

[0015] (G). Drive each selected color light-emitting element according to each first mixed brightness value, so that the white light-emitting unit generates a second white light beam, or drive each selected color light-emitting element according to each first brightness value, so that the red light-emitting unit, the green light-emitting unit and the blue light-emitting unit jointly generate a second mixed white light beam;

[0016] (H). Measure the second brightness value of each second white beam, or measure the second mixed brightness value of each second mixed white beam;

[0017] (I) Make the second brightness value of each colored light-emitting element consistent with the first mixed brightness value, and obtain a second adjustment parameter corresponding to the white light-emitting unit; or make the second mixed brightness value of each colored light-emitting element consistent with the first brightness value, and obtain a third adjustment parameter corresponding to the red light-emitting unit, the green light-emitting unit, and the blue light-emitting unit; and

[0018] (J). Grayscale color adjustment procedure based on the first adjustment parameter and the second adjustment parameter, or the first adjustment parameter and the third adjustment parameter.

[0019] In the preferred embodiment described above, step (D) includes:

[0020] (D1). Based on the first chromaticity value, adjust the current value corresponding to the red light-emitting unit so that the red light-emitting unit produces the first red beam;

[0021] (D2). Based on the first chromaticity value, adjust the current value corresponding to the green light-emitting unit to make the green light-emitting unit generate a first green beam; and

[0022] (D3). Based on the first chromaticity value, adjust the current value corresponding to the blue light-emitting unit so that the blue light-emitting unit produces the first blue light beam.

[0023] In the preferred embodiment described above, step (F) includes:

[0024] (F1). Determine whether the first mixed chromaticity value corresponding to the first mixed white beam is consistent with the first chromaticity value. If yes, proceed to the next step; otherwise, return to step (D).

[0025] (F2). Obtain 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 as the first adjustment parameter.

[0026] In the preferred embodiment described above, in 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 a second white light beam.

[0027] In the preferred embodiment described above, step (G) includes:

[0028] (G1). Based on the first brightness value, adjust the current value corresponding to the red light-emitting unit so that the red light-emitting unit generates a second red beam;

[0029] (G2). Based on the first brightness value, adjust the current value corresponding to the green light-emitting unit to cause the green light-emitting unit to generate a second green beam; and

[0030] (G3). Based on the first brightness value, adjust the current value corresponding to the blue light-emitting unit so that the blue light-emitting unit generates a second blue beam.

[0031] In the preferred embodiment described above, step (I) includes:

[0032] (I1). Determine whether the second brightness value corresponding to the second white beam is consistent with the first mixed brightness value. If yes, proceed to the next step; otherwise, return to step (G); and

[0033] (I2). Obtain the current value corresponding to the white light-emitting unit as the second adjustment parameter.

[0034] In the preferred embodiment described above, step (I) includes:

[0035] (I1). Determine whether the second mixed brightness value corresponding to the second mixed white beam is consistent with the first brightness value. If yes, proceed to the next step; otherwise, return to step (G); and

[0036] (I2). Obtain 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 as the third adjustment parameter.

[0037] The present invention further provides an input device with a backlight function, comprising:

[0038] case;

[0039] Multiple colored light-emitting elements are disposed within the housing, and each colored light-emitting element includes:

[0040] The red light-emitting unit is used to generate a red beam of light and project it onto the housing;

[0041] The green light-emitting unit is used to generate a green beam of light and project it onto the housing;

[0042] A blue light-emitting unit is used to generate a blue light beam and project it onto the housing; and

[0043] The white light-emitting unit is used to generate a white light beam and project it onto the housing;

[0044] The control module, housed within the casing and electrically connected to each of the colored light-emitting elements, includes a power supply circuit; and

[0045] A photocoupler is used to sense the chromaticity and luminance values ​​of red, green, blue, and white light beams.

[0046] The control module selectively supplies power to at least two of the colored light-emitting elements through the power supply circuit, and adjusts the current value corresponding to each red light-emitting unit, each green light-emitting unit, each blue light-emitting unit and each white light-emitting unit respectively, so that the chromaticity value of the mixed white beam formed by each red beam, each green beam and each blue beam is consistent with the chromaticity value of each white beam, and the brightness value of each mixed white beam is consistent with the brightness value of each white beam.

[0047] In the preferred embodiment described above, when the chromaticity value of each mixed white beam is consistent with the chromaticity value of each white beam, the control module acquires the current value corresponding to each red light-emitting unit, the current value corresponding to each green light-emitting unit, and the current value corresponding to each blue light-emitting unit, as the first adjustment parameter for each red light-emitting unit, each green light-emitting unit, and each blue light-emitting unit.

[0048] In the preferred embodiment described above, when the brightness value of each white beam is adjusted to be consistent with the brightness value of each mixed white beam, the control module obtains the current value corresponding to each white light-emitting unit as a second adjustment parameter for each white light-emitting unit.

[0049] In the preferred embodiment described above, when the brightness value of each mixed white beam is adjusted to be consistent with the brightness value of each white beam, the control module acquires the current value corresponding to each red light-emitting unit, the current value corresponding to each green light-emitting unit, and the current value corresponding to each blue light-emitting unit, as the third adjustment parameter for each red light-emitting unit, each green light-emitting unit, and each blue light-emitting unit.

[0050] The beneficial effect of the present invention is that the control module of the input device can selectively supply power to at least two of the colored light-emitting elements through the power supply circuit, and adjust their chromaticity and luminance values ​​respectively, thereby achieving the technical effect of saving power. Attached Figure Description

[0051] Figure 1 : A schematic diagram of the backlight-enabled input device connected to an electronic device provided by the present invention;

[0052] Figure 2 : A top view schematic diagram of an embodiment of the input device with backlight function provided by the present invention;

[0053] Figure 3 : A flowchart of the backlight color adjustment method provided by the present invention;

[0054] Figure 4 :for Figure 3 Detailed breakdown flowchart of step S104;

[0055] Figure 5 :for Figure 3 Detailed breakdown flowchart of step S106;

[0056] Figure 6 :for Figure 3 Detailed breakdown flowchart of step S107;

[0057] Figure 7A :for Figure 3 A detailed breakdown flowchart of the first embodiment of step S109; and

[0058] Figure 7B :for Figure 3 A detailed breakdown flowchart of the second embodiment of step S109.

[0059] Explanation of reference numerals in the attached figures:

[0060] BU23~BU26: Blue luminescent units

[0061] GU23~GU26: Green light-emitting unit

[0062] RU23~RU26: Red light-emitting units

[0063] WU23~WU26: White light-emitting unit

[0064] S101~S110: Steps

[0065] S1041~S1043: Steps

[0066] S1061~S1062: Steps

[0067] S1071~S1073: Steps

[0068] S1091~S1092: Steps

[0069] S1091'~S1092': Steps

[0070] 1: Electronic devices

[0071] 2: Input device with backlight function

[0072] 20: Connection Interface

[0073] 21: Control Module

[0074] 211: Power supply circuit

[0075] 22: Photocoupler

[0076] 23, 24, 25, 26: Colored light-emitting elements

[0077] 27: Shell Detailed Implementation

[0078] The advantages and features of the present invention, as well as the methods of achieving them, will be more readily understood through a more detailed description with reference to exemplary embodiments and accompanying drawings. However, the invention may be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments provided will enable those skilled in the art to more thoroughly and completely convey the scope of the invention.

[0079] First, please refer to Figure 1 and Figure 2 As shown. Figure 1 A schematic diagram of an input device with backlight function connected to an electronic device provided by the present invention; Figure 2This is a top view schematic diagram of an embodiment of the input device with backlight function provided by the present invention. The input device 2 with backlight function includes: a connection interface 20, a control module 21, a photosensitive coupling element 22, multiple color light-emitting elements 23, 24, 25, 26, and a housing 27. The connection interface 20, the control module 21, the photosensitive coupling element 22, and the multiple color light-emitting elements 23, 24, 25, 26 are all disposed within the housing 27. The connection interface 20 is electrically connected to the control module 21 and the photosensitive coupling element 22; furthermore, the connection interface 20 can also be connected to an external electronic device 1 via wired or wireless means, and can receive power or control signals from the electronic device 1 through the connection interface 20. In this embodiment, the electronic device 1 can be a desktop computer, a laptop computer, or a tablet; and the input device 2 with backlight function can be a keyboard, a mouse, a touch screen, a handwriting tablet, or a touchpad.

[0080] The control module 21 is a microprocessor (MCU) or a driver IC and has a power supply circuit 211. The control module 21 provided by this invention is electrically connected to the color light-emitting elements 23, 24, 25, and 26, and can selectively supply power to at least two of the color light-emitting elements 23-26 through the power supply circuit 211, enabling the color light-emitting elements 23, 24, 25, or 26 to project corresponding colors of light to different areas of the housing 27, or to adjust the chromaticity and brightness of the selected color light-emitting elements 23, 24, 25, or 26. For example, in... Figure 2 In this design, the backlit input device 2 is a backlit keyboard, and colored light-emitting elements 23, 24, 25, and 26 are disposed within the housing 27. Specifically, colored light-emitting element 23 is positioned below the general key area; colored light-emitting element 24 is positioned below the combination key area; colored light-emitting element 25 is positioned below the shortcut key area; and colored light-emitting element 26 is positioned below the numeric keypad area. These colored light-emitting elements positioned below each key area can project light onto the corresponding key area.

[0081] Please continue reading. Figure 1In this embodiment, the colored light-emitting elements 23, 24, 25, and 26 each have red light-emitting units RU23~RU26, green light-emitting units GU23~GU26, blue light-emitting units BU23~BU26, and white light-emitting units WU23~WU26. The control module 21 can drive the red light-emitting units RU23~RU26, green light-emitting units GU23~GU26, blue light-emitting units BU23~BU26, and white light-emitting units WU23~WU26 individually or simultaneously. For example, the control module 21 can drive the red light-emitting unit RU23, green light-emitting unit GU23, blue light-emitting unit BU23, or white light-emitting unit WU23 of the colored light-emitting element 23 individually, so that it projects a red light beam, a green light beam, a blue light beam, or a white light beam onto the housing 27; or, it can drive the red light-emitting unit RU23, green light-emitting unit GU23, and blue light-emitting unit BU23 simultaneously, so that it projects a mixed white light beam onto the housing 27, allowing the input device 2 with backlight function to produce different light-emitting visual effects. Although this embodiment only proposes an implementation method in which four colored light-emitting elements 23, 24, 25 and 26 are arranged in the housing 27, in actual applications, the number of colored light-emitting elements can be adjusted according to the needs of the input device, and is not limited to the implementation method proposed in this embodiment.

[0082] The photosensitive coupling element (CCD) 22 is used to sense the chromaticity and luminance values ​​of the red light beam, green light beam, blue light beam, or white light beam emitted by the red light-emitting units RU23~RU26, green light-emitting units GU23~GU26, blue light-emitting units BU23~BU26, or white light-emitting units WU23~WU26 of the color light-emitting elements 23, 24, 25, or 26, and transmits the parameter information such as chromaticity and luminance values ​​to the control module 23 through the connection interface 20. The control module 23 can adjust the current values ​​of the colored light-emitting elements 23, 24, 25, or 26 corresponding to the red light-emitting units RU23~RU26, green light-emitting units GU23~GU26, blue light-emitting units BU23~BU26, and white light-emitting units WU23~WU26, respectively, based on the received chromaticity and luminance values. This ensures that the chromaticity value of the mixed white beam formed by the red, green, and blue beams matches the chromaticity value of the white beam, and that the luminance value of the mixed white beam matches the luminance value of the white beam. Although this embodiment only proposes an implementation where the photosensitive coupling element 22 is electrically connected to the connection interface 20, in practical applications, the photosensitive coupling element 22 can also be directly electrically connected to the control module 21, and is not limited to the implementation proposed in this embodiment.

[0083] Please see Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7A and Figure 7B As shown. Figure 3 This is a flowchart of the backlight color adjustment method provided by the present invention. Figure 4 for Figure 3 Detailed breakdown flowchart of step S104; Figure 5 for Figure 3 Detailed breakdown flowchart of step S106; Figure 6 for Figure 3 Detailed breakdown flowchart of step S107; Figure 7A for Figure 3 A detailed breakdown flowchart of the first embodiment of step S109; Figure 7B for Figure 3 A detailed breakdown flowchart of the second embodiment of step S109.

[0084] exist Figure 3 First, power is selectively supplied to at least two of the colored light-emitting elements (step S101). In step S101, the control module 23 can automatically select the colored light-emitting elements to be adjusted (i.e., any two or more of colored light-emitting elements 23-26), or the user can manually select two or more colored light-emitting elements to be adjusted by operating the control interface (not shown in the figure) installed on the electronic device 1. In this embodiment, the control module 23 selects colored light-emitting elements 23 and 25 for chromaticity and brightness adjustment steps. Furthermore, it should be noted that in the subsequent adjustment steps, the chromaticity value is represented by the coordinates (x, y) of the CIE 1931 color space; the brightness value is represented by the symbol L, and the corresponding light-emitting unit is indicated in parentheses after (x, y) and L.

[0085] Next, the selected colored light-emitting elements are driven to generate a first white light beam from each white light-emitting unit WU23 and WU25 (step S102). In step S102, the white light-emitting units WU23 and WU25 are driven to generate white light beams respectively; then, the first chromaticity values ​​(xw1,yw1)(WU23) and (xw1,yw1)(WU25) and the first luminance values ​​Lw1(WU23) and Lw1(WU25) of each first white light beam are measured respectively (step S103). In step S103, the photosensitive coupling element 22 can simultaneously or sequentially sense the first white light beams of the color light-emitting elements 23 and 25, obtain the first chromaticity values ​​(xw1,yw1)(WU23), (xw1,yw1)(WU25) and the first luminance values ​​Lw1(WU23), Lw1(WU25) corresponding to each first white light beam, and transmit the parameter information such as the first chromaticity values ​​(xw1,yw1)(WU23), (xw1,yw1)(WU25) and the first luminance values ​​Lw1(WU23), Lw1(WU25) to the control module 21.

[0086] Next, based on the first chromaticity values ​​(xw1, yw1)(WU23) and (xw1, yw1)(WU25), the red light-emitting units RU23 and RU25, the green light-emitting units GU23 and GU25, and the blue light-emitting units BU23 and BU25 jointly generate a first mixed white light beam (step S104). In step S104, the control module 21 performs the following steps based on the sensed first chromaticity values ​​(xw1, yw1)(WU23) and (xw1, yw1)(WU25): Based on the first chromaticity values ​​(xw1, yw1)(WU23) and (xw1, yw1)(WU25), the current values ​​corresponding to the red light-emitting units RU23 and RU25 are adjusted to cause the red light-emitting units RU23 and RU25 to generate a first red light beam (step S1041); based on the first chromaticity values ​​(xw1, yw1)... (WU23), (xw1, yw1)(WU25), adjust the current values ​​corresponding to the green light-emitting units GU23 and GU25 to make the green light-emitting units GU23 and GU25 generate a first green light beam (step S1042); according to the first chromaticity values ​​(xw1, yw1)(WU23), (xw1, yw1)(WU25), adjust the current values ​​corresponding to the blue light-emitting units BU23 and BU25 to make the blue light-emitting units BU23 and BU25 generate a first blue light beam (step S1043) (as shown in the figure). Figure 4 (As shown).

[0087] Next, the first mixed chromaticity value (xw) of each of the first mixed white beams was measured. mix 1,yw mix 1)(RU23, GU23, BU23), (xw mix 1,yw mix 1)(RU25, GU25, BU25) and the first mixed brightness value Lw mix 1(RU23, GU23, BU23), Lw mix 1 (RU25, GU25, BU25) (Step S105). In step S105, the photosensitive coupling element 22 can simultaneously or sequentially sense the first mixed white light beams of the color light-emitting elements 23 and 25, and obtain the first mixed chromaticity value (xw) corresponding to each first mixed white light beam. mix 1,yw mix 1) (RU23, GU23, BU23), (xw mix 1,yw mix 1)(RU25, GU25, BU25) and the first mixed brightness value Lw mix 1(RU23, GU23, BU23), Lw mix1 (RU25, GU25, BU25), and the first mixed chromaticity value (xw) mix 1,yw mix 1)(RU23, GU23, BU23), (xw mix 1,yw mix 1)(RU25, GU25, BU25) and the first mixed brightness value Lw mix 1(RU23, GU23, BU23), Lw mix Parameter information such as 1 (RU25, GU25, BU25) is transmitted to the control module 21.

[0088] Next, the first mixed chromaticity value (xw) of each color light-emitting element 23, 25 is set. mix 1,yw mix 1) (RU23, GU23, BU23), (xw mix 1,yw mix 1) (RU25, GU25, BU25) are consistent with the first chromaticity values ​​(xw1, yw1)(WU23), (xw1, yw1)(WU25), and the first adjustment parameters corresponding to the red light-emitting units RU23, RU25, the green light-emitting units GU23, GU25, and the blue light-emitting units BU23, BU25 are obtained (step S106). In step S106, the control module 21 adjusts the first chromaticity values ​​(xw1, yw1)(WU23), (xw1, yw1)(WU25) and the first mixed chromaticity value (xw1, yw1)(WU25) according to the first chromaticity values ​​(xw1, yw1)(WU23), (xw1, yw1)(WU25) and the first mixed chromaticity value (xw1, yw1)(WU25). mix 1,yw mix 1) (RU23, GU23, BU23), (xw mix 1,yw mix 1)(RU25, GU25, BU25), perform the following steps: determine the first mixed chromaticity value (xw) corresponding to the first mixed white beam. mix 1,yw mix 1)(RU23, GU23, BU23), (xw mix 1,yw mix 1) Are (RU25, GU25, BU25) consistent with the first chromaticity values ​​(xw1, yw1)(WU23) and (xw1, yw1)(WU25)? If yes, proceed to the next step; otherwise, return to step S104 (step S1061); and obtain the current values ​​corresponding to the red light-emitting units RU23 and RU25, the current values ​​corresponding to the green light-emitting units GU23 and GU25, and the current values ​​corresponding to the blue light-emitting units BU23 and BU25 as the first adjustment parameters (step S1062). Figure 5 (As shown).

[0089] In step S1061, the control module 21 determines the first chromaticity values ​​(xw1, yw1)(WU23), (xw1, yw1)(WU25), and the first mixed chromaticity value (xw1, yw1)(WU25). mix 1,yw mix 1)(RU23, GU23, BU23), (xw mix 1,yw mix Whether the chromaticity values ​​of (RU25, GU25, BU25) are consistent depends on whether their coordinates in the CIE 1931 color space are consistent. The CIE 1931 color space is common knowledge to those skilled in the art, so it will not be elaborated further.

[0090] In a preferred embodiment, the control module 21 employs the following setting: when the first mixed chromaticity value (xw) mix 1,yw mix 1)(RU23, GU23, BU23), (xw mix 1,yw mix 1) When the x-coordinate difference and y-coordinate difference between (RU25, GU25, BU25) and the first chromaticity values ​​(xw1, yw1)(WU23) and (xw1, yw1)(WU25) are less than 0.01, the first mixed chromaticity value (xw1, yw1)(WU23) is determined to be less than 0.01. mix 1,yw mix 1)(RU23, GU23, BU23), (xw mix 1,yw mix 1) (RU25, GU25, BU25) are consistent with the first chromaticity values ​​(xw1, yw1)(WU23) and (xw1, yw1)(WU25). Otherwise, the first mixed chromaticity value (xw1, yw1)(WU25) is determined to be consistent. mix 1,yw mix 1)(RU23, GU23, BU23), (xw mix 1,yw mix 1) (RU25, GU25, BU25) are inconsistent with the first chromaticity values ​​(xw1, yw1)(WU23) and (xw1, yw1)(WU25). Although this embodiment only proposes a coordinate difference of 0.01 as the judgment standard, in actual application, it can be adjusted according to the backlight requirements of the product, and is not limited to the implementation method proposed in this embodiment.

[0091] Next, based on each of the first mixed brightness values ​​Lw mix 1(RU23, GU23, BU23), Lw mix1(RU25, GU25, BU25) drives the selected colored light-emitting elements 23, 25 to generate a second white light beam from the white light-emitting units WU23, WU25, or drives the selected colored light-emitting elements 23, 25 according to the first brightness values ​​Lw1(WU23), Lw1(WU25) to generate a second mixed white light beam from the red light-emitting units RU23, RU25, the green light-emitting units GU23, GU25 and the blue light-emitting units BU23, BU25 (step S107).

[0092] In step S107, the control module 21 determines the first mixed brightness value Lw. mix 1(RU23, GU23, BU23), Lw mix 1(RU25, GU25, BU25), adjust the current value corresponding to the white light-emitting units WU23 and WU25 so that the white light-emitting units WU23 and WU25 produce a second white beam; or, if it is necessary to adjust the brightness value of the mixed white beam formed by each red light-emitting unit RU23, RU25, each green light-emitting unit GU23, GU25 and each blue light-emitting unit BU23, BU25, then perform the following steps: according to the first brightness value Lw1(WU23), Lw1(WU25), adjust the current value corresponding to the red light-emitting unit RU23, RU25 so that the red light-emitting units WU23 and WU25 produce a second white beam; The light-emitting units RU23 and RU25 generate a second red light beam (step S1071); according to the first brightness values ​​Lw1 (WU23) and Lw1 (WU25), the current values ​​corresponding to the green light-emitting units GU23 and GU25 are adjusted so that the green light-emitting units GU23 and GU25 generate a second green light beam (step S1072); and according to the first brightness values ​​Lw1 (WU23) and Lw1 (WU25), the current values ​​corresponding to the blue light-emitting units BU23 and BU25 are adjusted so that the blue light-emitting units BU23 and BU25 generate a second blue light beam (step S1073). In addition, it should be noted that since the chromaticity values ​​of the red light-emitting units RU23, RU25, the green light-emitting units GU23, GU25, and the blue light-emitting units BU23, BU25 have been adjusted in step S106, when adjusting their current values ​​in steps S1071 to S1073, the current values ​​of the red light-emitting units RU23, RU25, the green light-emitting units GU23, GU25, and the blue light-emitting units BU23, BU25 must be increased or decreased proportionally to avoid the chromaticity values ​​from deviating again.

[0093] Next, the second brightness values ​​Lw2(WU23) and Lw2(WU25) of each second white beam are measured, or the second mixed brightness value Lw of each second mixed white beam is measured. mix 2(RU23, GU23, BU23), Lw mix2(RU25, GU25, BU25) (Step S108). In step S108, the photosensitive coupling element 22 can simultaneously or sequentially sense the second white beams of each colored light-emitting element 23, 25 to obtain the second brightness values ​​Lw2(WU23) and Lw2(WU25) corresponding to each second white beam; or simultaneously or sequentially sense the second mixed white beams of each colored light-emitting element 23, 25 to obtain the second mixed brightness value Lw2(WU25) corresponding to each second mixed white beam. mix 2(RU23, GU23, BU23), Lw mix 2 (RU25, GU25, BU25), and the second brightness value Lw2 (WU23), Lw2 (WU25) or the second mixed brightness value Lw mix 2(RU23, GU23, BU23), Lw mix Parameter information such as 2 (RU25, GU25, BU25) is transmitted to the control module 21.

[0094] Next, the second brightness values ​​Lw2(WU23) and Lw2(WU25) of each color light-emitting element 23 and 25 are mixed with the first mixed brightness value Lw mix 1(RU23, GU23, BU23), Lw mix 1 (RU25, GU25, BU25) are consistent, and the second adjustment parameters corresponding to the white light-emitting units WU23 and WU25 are obtained, or the second mixed brightness value Lw of each colored light-emitting element 23, 25 is made consistent. mix 2(RU23, GU23, BU23), Lw mix 2 (RU25, GU25, BU25) are consistent with the first brightness values ​​Lw1 (WU23) and Lw1 (WU25), and the third adjustment parameters corresponding to the red light-emitting units RU23, RU25, the green light-emitting units GU23, GU25 and the blue light-emitting units BU23, BU25 are obtained (step S109).

[0095] In step S109, if the final brightness of the white light-emitting units BU23 and BU25 is to be adjusted, the following steps are performed: It is determined whether the second brightness values ​​Lw2(WU23) and Lw2(WU25) corresponding to the second white beam are consistent with the first mixed brightness value Lw2(WU23). mix 1(RU23, GU23, BU23), Lw mix If 1 (RU25, GU25, BU25) is consistent, proceed to the next step; otherwise, return to step S107 (step S1091); and obtain the current values ​​corresponding to the white light-emitting units WU23 and WU25 as the second adjustment parameter (e.g., Figure 7A (As shown).

[0096] In step S109, if the final brightness of the red light-emitting units RU23, RU25, the green light-emitting units GU23, GU25, and the blue light-emitting units BU23, BU25 needs to be adjusted, the following steps are performed: Determine the second mixed brightness value Lw corresponding to the second mixed white beam. mix 2(RU23, GU23, BU23), Lw mix If 2(RU25, GU25, BU25) are consistent with the first brightness values ​​Lw1(WU23) and Lw1(WU25), proceed to the next step; otherwise, return to step S107 (step S1091'); and obtain the current values ​​corresponding to the red light-emitting units RU23 and RU25, the current values ​​corresponding to the green light-emitting units GU23 and GU25, and the current values ​​corresponding to the blue light-emitting units BU23 and BU25 as the third adjustment parameters (step S1092'). Figure 7B (As shown).

[0097] In steps S1091 and S1091', the control module 21 adopts the following settings: when the second brightness value Lw2(WU23) and Lw2(WU25) are mixed with the first mixed brightness value Lw mix 1(RU23, GU23, BU23), Lw mix When the difference between 1 (RU25, GU25, BU25) is less than 5%, or the second mixed brightness value Lw mix 2(RU23, GU23, BU23), Lw mix When the difference between 2(RU25, GU25, BU25) and the first brightness value Lw1(WU23), Lw1(WU25) is less than 5%, it is determined that the second brightness value Lw2(WU23), Lw2(WU25) and the first mixed brightness value Lw mix 1(RU23, GU23, BU23), Lw mix 1 (RU25, GU25, BU25) are consistent, or the second mixed brightness value Lw mix 2(RU23, GU23, BU23), Lw mix 2 (RU25, GU25, BU25) are consistent with the first brightness values ​​Lw1 (WU23) and Lw1 (WU25). Although this embodiment only proposes a brightness difference of 5% as the judgment standard, it can be adjusted according to the backlight requirements of the product in actual application. For example, a brightness difference of 5% to 10% can be used as the judgment standard, and it is not limited to the implementation method proposed in this embodiment.

[0098] Finally, a grayscale color adjustment procedure is performed based on the first adjustment parameter and the second adjustment parameter, or the first adjustment parameter and the third adjustment parameter (step S110).

[0099] In step S110, after obtaining the first adjustment parameter and the second adjustment parameter, the control module 21 combines the two parameters to obtain the current ratio between the current values ​​corresponding to the red light-emitting units RU23 and RU25, the current values ​​corresponding to the green light-emitting units GU23 and GU25, the current values ​​corresponding to the blue light-emitting units BU23 and BU25, and the current values ​​corresponding to the white light-emitting units WU23 and WU25. Finally, the control module 21 can drive the selected colored light-emitting elements 23 and 25 to generate a mixed light beam according to the current ratio. The mixed beam is then subjected to a grayscale color adjustment procedure; alternatively, after obtaining the first and third adjustment parameters, the control module 21 can combine these parameters to obtain the current ratio between the current values ​​corresponding to the red light-emitting units RU23 and RU25, the current values ​​corresponding to the green light-emitting units GU23 and GU25, and the current values ​​corresponding to the blue light-emitting units BU23 and BU25. Finally, the control module 21 can drive the selected color light-emitting elements 23 and 25 to generate a mixed beam according to the current ratio, and perform a grayscale color adjustment procedure on the mixed beam. The grayscale color adjustment procedure is common knowledge to those skilled in the art and will not be described in detail here.

[0100] Compared with the prior art, the input device with backlight function and its backlight color adjustment method provided by the present invention allow the control module to selectively supply power to at least two of the colored light-emitting elements through the power supply circuit, and adjust their chromaticity and brightness values ​​respectively. In addition to improving the color difference problem of mixed beams, it can also save about 41% of power in white light mode, thus having the technical effect of saving power. Therefore, the present invention is a highly valuable invention in the industry.

[0101] Any modifications, equivalent substitutions, and improvements made to this invention by those skilled in the art do not exceed the scope of protection of the claims.

Claims

1. A backlight color adjustment method, applied to an input device having multiple color light-emitting elements, each color light-emitting element including a red light-emitting unit, a green light-emitting unit, a blue light-emitting unit, and a white light-emitting unit, comprising the following steps: (A) Selectively supplying power to at least two of the plurality of colored light-emitting elements; (B). A control module individually drives the white light-emitting unit of each selected colored light-emitting element, so that each white light-emitting unit generates a first white beam of light; (C). Measure a first chromaticity value and a first luminance value for each of the first white beams; (D). Based on each of the first chromaticity values, each of the red light-emitting units, each of the green light-emitting units, and each of the blue light-emitting units jointly generate a first mixed white light beam; (E). Measure a first mixed chromaticity value and a first mixed luminance value for each of the first mixed white beams; (F). The first mixed chromaticity value of each of the colored light-emitting elements is made 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 between the x-coordinate and the difference between the y-coordinate of the first mixed chromaticity value and its coordinates in the CIE 1931 color space are both less than -0.01, it is determined that the first mixed chromaticity value is consistent with the first chromaticity value. (G). Drive each of the selected colored light-emitting elements according to each of the first mixed brightness values, so that the white light-emitting unit generates a second white light beam, or drive each of the selected colored light-emitting elements according to each of the first brightness values, so that the red light-emitting unit, the green light-emitting unit and the blue light-emitting unit jointly generate a second mixed white light beam; (H). Measure a second brightness value for each of the second white beams, or measure a second mixed brightness value for each of the second mixed white beams; (I) Make the second brightness value of each of the colored light-emitting elements consistent with the first mixed brightness value, and obtain a second adjustment parameter corresponding to the white light-emitting unit, or make the second mixed brightness value of each of the colored light-emitting elements consistent with the first brightness value, and obtain 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%, it is determined that the second brightness value is 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%, it is determined that the second mixed brightness value is consistent with the first brightness value; as well as (J). Perform a grayscale color adjustment procedure based on the first adjustment parameter and the second adjustment parameter, or the first adjustment parameter and the third adjustment parameter.

2. The backlight color adjustment method as described in claim 1, wherein step (D) includes: (D1). Based on the first chromaticity value, adjust the current value corresponding to the red light-emitting unit so that the red light-emitting unit generates a first red light beam; (D2). Based on the first chromaticity value, adjust the current value corresponding to the green light-emitting unit so that the green light-emitting unit generates a first green beam; as well as (D3). Based on the first chromaticity value, adjust the current value corresponding to the blue light-emitting unit so that the blue light-emitting unit generates a first blue light beam.

3. The backlight color adjustment method as described in claim 1, wherein step (F) includes: (F1). Determine whether the first mixed chromaticity value corresponding to the first mixed white beam is consistent with the first chromaticity value. If yes, proceed to the next step; otherwise, return to step (D); and (F2). Obtain 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 as the first adjustment parameter.

4. The backlight color adjustment method as claimed in claim 1, wherein in 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 adjustment method as described in claim 1, wherein step (G) includes: (G1). Based on the first brightness value, adjust the current value corresponding to the red light-emitting unit so that the red light-emitting unit generates a second red beam; (G2). Based on the first brightness value, adjust the current value corresponding to the green light-emitting unit so that the green light-emitting unit generates a second green beam; and (G3). Based on the first brightness value, adjust the current value corresponding to the blue light-emitting unit so that the blue light-emitting unit generates a second blue light beam.

6. The backlight color adjustment method as described in claim 1, wherein step (I) includes: (I1). Determine whether a second brightness value corresponding to the second white beam is consistent with the first mixed brightness value. If yes, proceed to the next step; otherwise, return to step (G); and (I2). Obtain the current value corresponding to the white light-emitting unit as the second adjustment parameter.

7. The backlight color adjustment method as described in claim 1, wherein step (I) includes: (I1). Determine whether a second mixed brightness value corresponding to the second mixed white beam is consistent with the first brightness value. If yes, proceed to the next step; otherwise, return to step (G); and (I2). Obtain 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 as the third adjustment parameter.

8. An input device with backlight function, comprising: A shell; Multiple colored light-emitting elements are disposed within the housing, each of the colored light-emitting elements comprising: A red light-emitting unit is used to generate a red beam of light and project it onto the housing; A green light-emitting unit is used to generate a green beam of light and project it onto the housing; A blue light-emitting unit is used to generate a blue light beam and project it onto the housing; and A white light-emitting unit is used to generate a white beam of light and project it onto the housing; A control module, disposed within the housing and electrically connected to each of the colored light-emitting elements, and having a power supply circuit; and A photosensitive coupling element is used to sense the chromaticity and luminance values ​​of the red light beam, the green light beam, the blue light beam, and the white light beam; The control module selectively supplies power to at least two of the plurality of colored light-emitting elements through the power supply circuit, and adjusts the current values ​​corresponding to each of the red, green, blue, and white light-emitting units respectively, so that the chromaticity value of the mixed white beam formed by the red, green, and blue beams is consistent with the chromaticity value of each white beam. When the difference between the x-coordinate and y-coordinate of the chromaticity value of the mixed white beam and the chromaticity value of the white beam in the CIE 1931 color space is less than 0.01, it is determined that the chromaticity value of the mixed white beam is consistent with the chromaticity value of each white beam. Furthermore, it ensures that the luminance value of the mixed white beam is consistent with the luminance value of each white beam. When the difference between the luminance value of the mixed white beam and the luminance value of the white beam is less than 5% or between 5% and 10%, it is determined that the luminance value of the mixed white beam is consistent with the luminance value of the white beam.

9. The input device with backlight function as claimed in claim 8, wherein when the chromaticity value of each of the mixed white light beams is consistent with the chromaticity value of each of the white light beams, the control module acquires the current value corresponding to each of the red light-emitting units, the current value corresponding to each of the green light-emitting units, and the 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.

10. The input device with backlight function as claimed in claim 8, wherein when the brightness value of each of the white light beams is adjusted to be consistent with the brightness value of each of the mixed white light beams, the control module obtains the current value corresponding to each of the white light-emitting units as a second adjustment parameter for each of the white light-emitting units.

11. The input device with backlight function as claimed in claim 8, wherein when the brightness value of each of the mixed white light beams is adjusted to be consistent with the brightness value of each of the white light beams, the control module acquires the current value corresponding to each of the red light-emitting units, the current value corresponding to each of the green light-emitting units, and the current value corresponding to each of the blue light-emitting units as a third 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.

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