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Optical touch pad, handheld electronic device and method

An electronic device and optical technology, applied in the direction of data processing power supply, electrical digital data processing, instruments, etc., can solve the problems of limited electric energy, electric energy consumption, user inconvenience, etc.

Active Publication Date: 2012-10-17
PIXART IMAGING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in order to detect the intensity of ambient light, the hand-held electronic device has to add related circuits for detecting ambient light, which also causes more power consumption
Therefore, even if a hand-held electronic device is equipped with a relevant circuit for detecting ambient light, the power it can save is quite limited, and the effect of extending the standby time cannot really be achieved, causing inconvenience to the user.

Method used

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  • Optical touch pad, handheld electronic device and method
  • Optical touch pad, handheld electronic device and method
  • Optical touch pad, handheld electronic device and method

Examples

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Embodiment Construction

[0029] Please refer to figure 1 . figure 1 It is a schematic diagram illustrating the hand-held electronic device 100 with power-saving function of the present invention, which is mainly used to make readers understand the situation of the hand-held electronic device 100 of the present invention when the user uses it, and the mobile phone which is not related to the present invention Components will be ignored (eg keyboard, speakers...etc). As shown in the figure, the handheld electronic device 100 includes a display panel 110 and an optical touch panel 120 . A target C (such as a cursor) is displayed on the display panel 110 . When the user wants to move the cursor C, the user can place an indicator F (such as a finger) on the optical touch panel 120 and move it. When the optical touch panel 120 senses the movement of the user's finger F, Cursor C will also move accordingly. In addition, the handheld electronic device 100 uses indirect touch, that is, when the finger F mo...

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Abstract

The invention discloses an optical touch pad, which comprises a light source, a specific light sensing array, an approach detector and a moving detector, wherein the light source is used for emitting a specific light ray; the specific light sensing array is used for sensing a light ray reflected from the specific light rays by an indicating object and generating a specific light sensing image; the approach detector is used for judging an indicating distance between the indicating object and the optical touch pad according to the sensing image; and the moving detector is used for judging a trace of the indicating object according to the specific light sensing image and outputting the trace, and when the approach detector judges that the indicating distance is greater than a preset value, the moving detector is switched off.

Description

technical field [0001] The invention relates to a touch pad, in particular to an optical touch pad with power saving function. Background technique [0002] Handheld electronic devices, such as mobile phones, have been widely used by the public. Under the fierce competition in the market, various manufacturers are devoting themselves to introducing new functions of handheld electronic devices. However, the handheld electronic device is powered by its battery after all, so the standby time is also limited by the total power of the battery. Therefore, how to reduce the power consumption of handheld electronic devices under the condition of limited battery power has also become the direction of efforts of various manufacturers. [0003] The most power-consuming part of a traditional handheld electronic device is its backlight module. Therefore, if the power consumption of the backlight module is effectively reduced, the standby time of the handheld electronic device can be gr...

Claims

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Application Information

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IPC IPC(8): G06F3/042G06F1/32
Inventor 高铭璨吴志彦古人豪
Owner PIXART IMAGING INC
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