TW201014209A - Human machine interface and activating method for back light unit thereof - Google Patents

Abstract

A human machine interface and an activating method for black light unit thereof are provided. The human machine interface includes a light sensor, an infrared sensor and a back light unit. The infrared sensor is selectively activated. When the infrared sensor is activated, the infrared sensor detects whether the extremity of a user is located within a detective distance or not. When the light sensor detects the environmental light intensity changed from a higher light intensity to a lower light intensity and the variation from the higher light intensity to the lower light intensity exceeds a predetermined light intensity, the infrared sensor is continuously activated a first period. When the light sensor detects the environmental light intensity less than a second predetermined light intensity and the activated infrared sensor detects the extremity of the user located within the detective distance, the back light unit is continuously activated a second period.

Description

201014209

TW4815PA IX. Description of the Invention: [Technical Field] The present invention relates to a human-machine interface and a method for starting the same, and more particularly to an inductive human-machine interface and a method of starting the same. [Prior Art] In today's fast-changing technology, projectors have become an integral part of everyday life for modern people. Moreover, the operation mode of the projector is gradually applied to the wireless control technology. With wireless control technology, the projector can still be operated while the user is at a distance from the projector. In general, wireless control technology is often used in human-machine interfaces that are separate from the projector, such as remote controls. However, when using the projector, it is generally necessary to pull up the curtains to clearly view the projection screen, so that the remote control will be in a darker space, and it is more difficult to find the remote control using w. Alternatively, when the user turns off the indoor light and the environment changes from bright to dark, the user also encounters the above-mentioned problem that it is difficult to find the remote controller. SUMMARY OF THE INVENTION The present invention is directed to a human interface and a method of activating the same. The human-machine interface can automatically detect whether the amount of ambient light is too dark to activate a backlight unit to emit light toward a button to display the human-machine interface in the dark. 6 201014209

The position of the TW4815PA and the position of the button on the man-machine interface. The method of the present invention allows the user to quickly find the human-machine interface in the dark, and the human-machine interface of the present invention has the advantage of saving power. According to an aspect of the invention, a human machine interface is proposed. The human interface includes a button, a light sensor, an infrared sensor, and a backlight unit. The light sensor is used to detect an amount of ambient light. The infrared sensor is selectively activated to detect whether a user's limb is within a detection distance when the infrared sensor is activated. The backlight unit is selectively activated to emit a light toward the button when the backlight unit is activated. Wherein, at a time point Ta, the light sensor detects (a) the amount of ambient light changes from a higher brightness to a lower brightness, and (b) the amount of change between the higher brightness and the lower brightness exceeds a preset The difference in light amount, the infrared sensor is activated from the time point Ta and is continuously activated for a first time period T1, and the infrared sensor is continuously activated to the time point Ta+Tl. Wherein, if the infrared sensor continues to be activated for a time point Tb, (1) the activated infrared sensor detects that the user's limb system is within the detection distance, and the backlight unit is activated and continues from the time point Tb. After being activated for a second time period T2, the backlight unit is continuously activated to the time point Tb+T2. The state in which the backlight unit is activated may also increase (2) the condition that the light sensor detects that the amount of ambient light is less than a second predetermined amount of light, and (1) and (2) are simultaneously established, and the backlight unit is activated. According to another aspect of the present invention, a human machine interface is proposed. The human machine interface includes a button, a light sensor, an infrared sensor, and a backlight unit. The light sensor is used to detect an amount of ambient light. The infrared sensor is selectively activated, and when the infrared sensor is activated, it can detect whether there is a 7 201014209

I W48I5PA The user's limb is located within a detection distance. The backlight unit is selectively activated to emit a light toward the button when the backlight unit is activated. Wherein, if at a time point Td, the light sensor detects that the ambient light amount is changed from being higher than a first preset light amount to being lower than the first preset light amount, the infrared sensor is activated from the time point Td and is continuously activated. In the fourth time period T4, the infrared sensor is continuously activated to the time point Td+T4. Wherein, if the infrared sensor continues to be activated for a time point Tb, (1) the activated infrared sensor detects that the radiation infrared system is within the detection distance, and the backlight unit® is from the time point Tb. The second period T2 is started and continuously activated, and the backlight unit is continuously activated to the time point Tb+T2. When the backlight unit is activated, the condition that the π (2) light sensor detects that the ambient light amount is less than a second preset light amount is increased, and (1) and (2) are simultaneously established, and the backlight unit is Was started. According to still another aspect of the present invention, a method of activating a backlight unit of a human machine interface is provided. The method of starting the backlight unit of the human machine interface includes the following steps. A human-machine interface is provided. The human-machine interface has a button, a light sensor, an infrared sensor and a backlight unit. The light sensor is used to detect the amount of ambient light at the location of the human interface and is selectively activated to detect whether a user's limb is within a detection distance. The backlight unit is selectively activated to emit a light toward the button. If at a time point Ta, the light sensor detects (a) that the amount of ambient light changes from a higher brightness to a lower brightness, and (b) the difference between the higher brightness and the lower brightness exceeds a predetermined amount of light difference When the infrared sensor is activated from the time point Ta and is continuously activated for a first time period T1, the infrared sensor is continuously activated until the time point 8 201014209

TW4815PA D-a+Tl. If the infrared sensor is continuously activated for a time point Tb within the start-up period, (1) the activated infrared sensor detects that the user's limb system is within the system distance. The backlight unit is activated from the time point and is continuously activated. The second time period T2 'the backlight unit is continuously activated to the time point Tb+T2. The condition in which the above-mentioned unit is activated may also increase the condition that the (2) light sensor detects that the ring hole light is smaller than a second preset light quantity ", and (1) and (2) simultaneously establish a 'backlight unit Will be activated. Φ In order to make the above-mentioned content of the present invention more comprehensible, the following description of the preferred embodiment and the accompanying drawings will be described in detail as follows: [Embodiment] Please refer to FIG. 1 and FIG. 2 at the same time. The figure is a schematic diagram of a human machine interface according to an embodiment of the present invention, and FIG. 2 is a functional block diagram of a human machine interface of the second drawing. The human interface 1 includes a body 112, a button 102, a light sensor 104, an infrared sensor 106, a backlight unit 70 108, and a processing unit (not shown in FIG. 1). ). The body 112 has a body front surface 114 and four body side surfaces 116. The front surface width wi is greater than the body side width W2. In this embodiment, a human-machine interface is used as an example for description. However, the present invention is not limited thereto, and a button on the projector can also use the interface to control the backlight. The light sensor 104 is used to detect the amount of ambient light. The backlight unit 〇8 is selectively activated by the processing unit 110. When the backlight unit 1〇8 is activated, a light can be emitted toward the button 102, and the button 1〇2 is rendered in a bright state. Please refer to FIG. 3, which shows the human-machine interface of the embodiment placed on the table 9 201014209

Schematic on TW4815PA. The infrared sensor 1 〇 6, for example, a passive infrared sensor (PASSIVE INFRARED SENSOR), is selectively activated by the processing unit 110. When the infrared sensor 1〇6 is activated, it is possible to detect whether or not the user's limb is located within a predetermined distance D. The detection distance D of the infrared sensor 1 〇 6 is, for example, less than 60 cm. Assume that the short side of the table 11 § 125 has a visibility W3 of 120 cm, and the human interface 1 is placed near the center of the table 118. Thus, when the user's limb is on the four sides of the table 118, φ will exceed the detection distance D. It is only possible to enter the detection distance D when the user's limb moves above the table 118. As shown in FIG. 3, when the human-machine interface 1 is placed on the table 118, the front surface 114 of the main body faces substantially vertically upwards. If the infrared sensor 106 is disposed on the front surface 114 of the main body, the infrared sensor 1〇6 When activated, it can detect the user's limb (not shown), such as the user's hand, moving to the top of the display unit. Alternatively, the infrared sensor 106 may be disposed outside the front surface 114 of the main body. For example, the infrared sensor 106 can also be disposed on the body side 116 (the body side 116 is shown in the figure). When the human machine interface is placed on the table 118, the body side 116 faces in the horizontal direction. The infrared sensor 106 detects whether the user's limb has moved to the side of the human-machine interface 1 〇 且 and above the table 118. The method in which the human interface 100 activates the backlight unit 108 will be described in detail below. Referring to FIG. 4A and FIG. 4B, a flow chart of a method for starting a backlight unit by the human-machine interface of FIG. 1 is illustrated. Human interface 100 starts backlight unit 201014209

The method of TW4815PA 108 includes the following steps. First of all, please refer to Figure 5 (4). It will start an example of the environment and the light waveform of the infrared light device of the human body. In step 82A of FIG. 4A, the light sensor 1〇4 detects whether the ambient light amount f is a higher brightness L1 and converts into a lower brightness L2 and the light sensor measures between the higher brightness L1 and the lower brightness L2. Whether the amount of change LD exceeds a predetermined amount of light difference. If the light sensor 1〇4 is detected (

The high-brightness U-view money is low L2 and (2) (four) the change amount LD between the L2 and the L2 exceeds the preset light amount difference, and the condition is satisfied, the process proceeds to step S204, and if not, the process proceeds to step §212.

In step S204, if the condition (1)(2) above is "at the same time", the infrared sensor 106 will be activated by the processing unit 110 and be shaken for the first time period τι', for example, - hour. That is to say, the infrared, ', the receiver 106 will continue to be activated to the time point Ta + T1. In addition, although the first time period T1 of the present example is described by taking one hour as an example, :: its embodiment As long as the first time period 71 meets the user's expected degree, the length of time is not limited by the embodiment. Then, in step S212, 'light sensing 11 1〇4 (four) ambient light quantity is the amount of dry light The higher brightness L1 (4) higher than the first preset light amount illusion is (2) lower than the lower brightness L2 of the first preset light amount illusion; if yes, the process proceeds to step S214; if not, the process proceeds to step S216. In !4, if the above "higher than the first preset light amount to shift - the first preset light amount S1" condition (1) and condition (2) are at the time point, the infrared sensor 106 will be from the time point Td. Processing unit 201014209

The TW4815PA 110 is activated and continues to be activated for the fourth time period T4, which is, for example, one hour. That is, the infrared sensor 106 is continuously activated to the time point Td+T4. In step S216, the processing unit 110 detects whether the button 102 is pressed, and if so, proceeds to step S218; if not, proceeds directly to step S219. In step S218, if the condition that the π button 102 is pressed " is established at the time point Tc, the infrared sensor 106 starts from the time point Tc by the processing unit 110 and continues to be activated for the third time period T3, The three time period T3 is, for example, one hour. That is, the infrared sensor 106 is continuously activated to the time point Tc + T3. In step S219, the processing unit 110 sets the start time of the infrared sensor 106 according to the maximum value of (Ta+Tl, Tc+T3, Td+T4); thus, the setting of the infrared sensor 106 start time action is completed once. The preset light amount difference of step S204 may be between 200 and 300 lux φ s (1 ux), and the amount of change of the ambient light amount from the higher brightness L1 to the lower brightness L2 is, for example, within 5 seconds. The amount of change obtained is measured, but the present invention is not limited thereto. The first preset light amount S1 in step S212 is, for example, 100 lux, which is not suitable for human eye reading under this amount of light. That is to say, it is difficult for the human eye to find the position of the human-machine interface 100 under this amount of light. Therefore, it is necessary to activate the infrared sensor 106 to detect the position of the user to activate the backlight unit 108 in a timely manner. In addition, if the processing unit 110 does not receive the condition that any of the conditions of steps S202, S212, and S216 is established, the inference person 12 201014209 TW4815PA machine interface 100 or the projector has been stored in the backpack, drawn, or Therefore, the light sensor 104 _ ambient light amount may vary, but the amount of change is not large 'or before and after the change is lower than the first preset light amount S. Therefore, the infrared sensor 106 does not need to continue to detect the environment, but can be Turn off to reduce battery power consumption. At this time, the processing unit 11 re-updates the infrared sensor 106 to start the termination time. That is, if the infrared sensor 106 starts the termination time has arrived,

If any of the conditions of steps S202, S212, and S216 fails to be established, the infrared sensor 1〇6 will remain in the disabled state. In this way, the user's expected length of use can be met, and the power of the infrared sensor 1〇6 can be saved. Then, as shown in Fig. 4B, in step S205, the processing unit first judges whether or not the infrared sensor 1〇6 start termination time has reached $. If so, the process proceeds to step S222 to disable the infrared sensor 106; if not, the process proceeds to step S206. In step S206, the light sensor 104 detects whether the ambient light amount is smaller than a second preset light amount S2, and if so, proceeds to step S208; if not, returns to step S205. In step S208, the activated infrared sensor ι 6 detects whether the user's limb is within the detection distance, and if so, proceeds to step S2101; if not, returns to step S205. In step S210, if the condition of "the user's limb is within the detection distance" is established at the time point Tb, the backlight unit 108 will be activated from the time point Tb and continuously activated for a second time period T2; That is, backlight single 201014209

The TW48I5PA 兀108 will continue to be activated to the time point τ. For example, as shown in Fig. 8, it is shown as an example of the ambient light waveform of the backlight unit (10). The human-machine interface of the example is illustrated by the example in Figure 9. It shows the other example of the ambient light waveform of the person 1 and the mountain of the face of the mountain. . At time (4), the user's limb is detected by the infrared sensor _ in the distance D. At this time, the ambient light amount is already less than the second preset light amount 2 ❹, for example, at the time point Ta3, it is less than the second preset light amount %, so The backlight unit 108 is activated at the time point Tb and continues to be activated for the second time period τ2. That is to say, when the infrared sensor 106 is activated, the backlight unit 108 is activated under the condition that the user's limb is located within the detection range D and the amount of ambient light is less than that. Predicting 4篁% Further, it is assumed that at the time point, the user pulls up the curtain to reduce the amount of light in the room to be greater than the LD, so that the infrared sensor (10) is continuously activated for the first time period T1 at the time point Ta. However, the amount of ambient light can be still higher than the second predetermined amount of light S2 shown in Fig. 8 at the first time point Ta. At this time, since the environment is bright, even if the infrared sensor 106 is activated and the user's limb has entered the detection distance D, it is not necessary to activate the backlight unit 108. Assuming that at time point Tb of FIG. 8 or time point Ta3 of FIG. 9, the user further turns off the indoor light to lower the indoor illumination below the second preset light amount S2. The infrared sensor ι 6 is activated and the user is activated. When the limb has entered the detection distance D, the light sensor 1〇4 detects that the ambient light amount is less than the second preset light amount S2, and then activates the backlight unit 108, 201014209

The TW4815PA avoids wasting power. Therefore, during the startup period of the infrared sensor 106 (for example, the first period T1 of FIG. 5, the fourth period T4 of FIG. 6 or the third period T3 of the seventh figure), when the light sensor 104 detects When the amount of ambient light is less than the second predetermined amount of light S2 and the infrared sensor 106 detects that the user's limb enters the detection distance D, the processing unit 110 activates the backlight unit 11〇, causing the backlight unit 110 to emit light to the button 102. To make the button 1〇2 appear _ bright state, and let the user see the button 1〇2 in the dark state in the dark, so that the user can find the man-machine interface. The human-machine interface disclosed in the above embodiments of the present invention and the method for starting the backlight unit thereof have a plurality of advantages, and only some of the advantages are as follows:

Only continue to be activated for the first time period

T1, the third period T3 or the fourth period T4, during which the infrared sensor 106 is disabled after the period of time, if the infrared sensor 106 is not activated again. In this way, the length of use of the infrared sensor 1 〇 6 can be saved while meeting the expected length of use of the user. θ (2) when the infrared sensor 1 〇 6 is activated, the ambient light amount is lower than a light amount ', for example, the second preset light amount, and the user's limb has entered the Russian measuring distance D, the backlight unit (10) 彳Will be activated. Thus, the waste of power of =2 single::08 can also allow the user to quickly find the human-machine interface in black, and can increase the human-machine interface usage, although the invention has been disclosed in a preferred embodiment. As above, 15 201014209

TW4815PA is not intended to limit the invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

16 201014209

TW4815PA [Simplified Description of the Drawings] Fig. 1 is a schematic view showing a human-machine interface according to an embodiment of the present invention. Figure 2 is a functional block diagram of a human machine interface in accordance with the present invention. Fig. 3 is a view showing the human interface of the present embodiment placed on a table. 4A and 4B are flow charts showing a method for starting the backlight unit by the human interface of Fig. 1. 〇 FIG. 5 is a diagram showing an example of a waveform of an ambient light that activates the infrared sensor of the human-machine interface of the embodiment. Fig. 6 is a view showing another example of the ambient light waveform of the infrared sensor which activates the human-machine interface of the embodiment. . Fig. 7 is a view showing another state of the button of the infrared sensor which activates the human-machine interface of the embodiment. Fig. 8 is a view showing an example of an environmental brightening waveform diagram of the backlight unit φ 108 which activates the human-machine interface of the embodiment. Fig. 9 is a view showing another example of the environmental brightening waveform of the backlight unit 108 for starting the human-machine interface of the embodiment. [Main component symbol description] 100 : Human machine interface 102 : Button 104 : Light sensor 106 : Infrared sensor 201014209

TW4815PA

108: backlight unit 110: processing unit 112: body 114: body front 116: body side 118: table 12 5: short side of the table W1: body front width W2: body side width W3: table width D: detection distance

Ta, Tal, Ta3, Tb T1 : First time period T2 : Second time period T3 : Third time period T4 : Fourth time period L1 : Higher brightness L2 : Lower brightness LD : Change amount S1 : First preset light amount S2 : Second preset light amount time point 18

Claims (1)

201014209 TW4815FA X. Patent application scope: 1. A human-machine interface, including · one button; a light sensor for detecting an ambient light quantity; an infrared sensor selectively activated, when the infrared sensor When activated, detecting whether a user's limb is within a detection distance; and a backlight unit is selectively activated to emit a light toward the button when the backlight unit is activated; At a time point Ta, the light sensor detects (a) the ambient light quantity changes from a higher brightness to a lower brightness 'and (b) the change between the southerness and the lower brightness exceeds a preset light amount difference, the infrared sensor is activated from the point Ta at the time point and is continuously activated for a first time period T1, the infrared sensor is continuously activated to the time point Ta+Tl; wherein, the infrared sensor continues a time φ point Tb during the start-up period, (1) the light sensor detects that the ambient light amount is less than a second preset light amount, and (2) the activated infrared sensor detects the user System located within the detection range, the backlight unit from the start time point Tb is started and continues to be a second period T2, the backlight unit is activated to the time duration Tb + T2. 2. The human-machine interface according to claim 1, wherein the button is pressed at a time point Tc, the infrared sensor is activated from the time point Tc and is continuously activated for a third time period T3, the infrared ray The sensor is continuously activated to the time point Tc+T3. 19 201014209 TW48I5PA 3. The human-machine interface according to claim 1, wherein at - time, Td, the amount of ambient light from the light sensor side to the ambient light is changed from higher than a first pre-light The ith set light amount, the infrared sensor is activated from the time point Td and is continuously activated - the fourth time period, the infrared sensing benefit is continuously activated to the time point Td+T4. 4. If you apply for a patent scope! In the human-machine interface described in the item, the first-time period η in the bean is at least one hour to meet the intended use of the user. 5. The human-machine interface of claim i, wherein the preset light amount difference is between 200 and 30 lux. The human-machine interface as described in the scope of the patent application, wherein the amount of ambient light converted from the higher brightness to the lower brightness is measured by the amount of change measured within 5 seconds. The human-machine interface described in claim 1, wherein the human-machine interface has a body front surface and a body side surface, and the body front surface width is greater than the body side width 'when the human-machine interface is placed on a table, The front surface of the main body is substantially directly facing the upper side, and the infrared sensor is provided with a front surface to detect whether the user's limb moves to the human-machine interface described in the first item of the human-machine human-machine patent (4). Wherein the front surface of the body is greater than the front surface of the main body, and the front side of the main body is disposed on a table when the side of the main body is facing the horizontal interface. The side of the main body can detect whether the user's limb moves to the human-machine interface water. 20 201014209 1 W48I5PA Flat side. 9. If the human-machine interface described in item 8 of the patent application is applied, the detection distance of the infrared sensor is less than 60 cm, so that the user's limb is beyond the margin when the limb is located at the side of the δhai table. The distance is entered when the user's limb moves over the table. 10. A human-machine interface, comprising: a button; a light sensor for detecting an ambient light amount; . Infrared sensing n' is selectively activated, when the infrared sensor is activated, detecting whether there is - the user's limb is located within the detection distance; and a backlight unit is selectively activated. When the unit is activated, a light can be emitted toward the button; in a time point Td, the light sensor detects that the ambient light is converted from being lower than the first preset light amount to lower than the first preset The amount of light, the red line sensor starts from the time 'point T cM skin and continues to be activated for a fourth time period T4, the infrared sensor is continuously activated to the time point Td+T4; wherein, the infrared sensor a time point Tb during the continuous activation period, (1) the light sensor detects that the ambient light amount is less than a second preset light and (2) the activated infrared sensor detects the radiation infrared The object system is located within the detection distance, the backlight unit is activated from the time point and is continuously activated for a second time period T2, and the backlight unit is continuously activated to the time point Tb+T2. 11. The human-machine interface as described in the first paragraph of the patent application, wherein 21 201014209 TW4815PA the button is pressed at a time point Tc, the infrared sensor is activated from the time, and the TC is continuously activated for a third period of time. T3, the infrared sensor is continuously activated to the time point Tc+T3. 12. The human-machine interface as described in item 1 of the patent scope, wherein the fourth time period is at least - hour to meet the expected usage length of the user. 13. As described in claim 1 The human-machine interface, wherein the first preset light quantity is between 8 〇 and 12 〇 lux. ^ 14. The human-machine interface of claim 1, wherein the 6-person machine interface has a body front surface and a body side surface, the body front surface width being greater than the width of the body surface of the body, when the human-machine interface is placed The front surface of the main body is substantially vertically upward, and the infrared sensor is disposed on the front surface of the main body to detect whether the user's limb moves _ above the human machine interface. ❹ ^丨5. The human-machine interface according to claim 10, wherein the human-machine interface has a front surface of the main body and a side surface of the main body, wherein a width of the front surface of the main body is greater than a width of the side surface of the main body, and the human-machine interface is placed on the human-machine interface. - On the table ': The side of the body faces in the horizontal direction, and the infrared sensor is disposed on the side of the forest body' to make the user's limb move to the horizontal side of the human-machine interface. 16' The human-machine interface as described in the patent scope of 315, wherein the detection distance of the infrared sensor is less than 6G cm, so that the rain will exceed the detection when the body is located on the side of the table. Distance, when the user moves the body _ the # child (four) will enter the person (four) to measure the distance. 22 201014209 TW48I5PA 17. A method to start the human-machine interface - such as the first month of the month, including: Provide a human-machine interface, the person's stomach and the device, - infrared sensor and a back to ... _ _ _ _ _ Λ ^ W ^ ^ ^ The first time, the light sensor is used to detect one of the 5 人 human-machine interface where the ring 挎,, only, witness; 士, ± m 4, 兄光里' sub-selectively Is activated to detect if there is a user's limb within the detection range of the Ak. iPif ,, the backlight unit is selectively activated to face the 兮 步骤 step: 别门. The HE button emits a light; the method includes detecting, by the reference-light sensor, (a) the ambient light amount L:= becomes a lower brightness' and (6) the higher brightness and the second self:: two are more favorable - when the preset light amount difference is 'the infrared sensing benefit from the calling point Ta is activated and is continuously activated for a first time period τι, the infrared sensor is continuously activated to the time point twt 1. When the infrared sensor is continuously activated Period (4) - time point =, (1) the light sensor detects that the ambient light amount is less than a second preset light and (2) the infrared sensor is activated to detect that the user limb system is located in the detection Within the distance, the backlight unit is activated from the time point Tb = continuously activated - the second time period T2, the backlight unit is continuously activated to the time point Tb + T2. The method of claim 17, wherein the third time period is at least - hour 'to meet the expected length of use of the user. The method of claim 17, wherein the light quantity difference is between 200 and 3 lux. 20. The method of claim 17, wherein the amount of change in the amount of light is measured in 5 seconds. The method of claim 17, further comprising the step of: at a time point Td, the light sensor detects that the ambient light amount is changed from being higher than a first predetermined amount of light to being low. At the first preset amount of light, the infrared sensor is activated from the time point Td and continues to be activated for a fourth time period T4, and the infrared sensor is continuously activated to the time point Td+T4. twenty four