Input device and position scanning method

Abstract

The invention relates to an input device and a position scanning method. The input device comprises a plurality of light emitters, a plurality of light sensors, a control element and a signal processing element, wherein the plurality of light emitters and the plurality of light sensors are positioned on one side of a sensing area of the input device; the control element controls the light emitters to emit light beams, and controls the light sensors to receive the light beams reflected from an indicator in the sensing area; and the signal processing element processes light sensing signals produced by the light sensors, and transmits the processed light sensing signals to the control element. Simultaneously, the invention also provides the position scanning method for the input device.

Description

technical field [0001] The invention relates to an input device and a position scanning method, in particular to a low-cost input device and a position scanning method. Background technique [0002] A device for inputting commands or information by means of touch, such as a display screen with touch function, can accurately locate the position of the touch point within the effective sensing distance of the touch. There are many ways to detect the position of the touch point on the display screen. One of them is to install the light emitting module and the light sensing module at the corner of the touch screen at the same time. The light emitting module emits a light beam. When the emitted light beam hits the pointer object (user's finger, pen or other objects), so that part of the light beam is reflected back to part of the sensing element of the light sensing module, and the position of the reflected light beam at the touch point of the indicator is sensed by the sensing el...

AI Technical Summary

Problems solved by technology

As mentioned above, the resolution of this touch input technology depends on the number of light emitting modules and light sensing modules. In order to have a certain resolution and completely cover the touch sensing area, light emitting devices must be densely arranged on the four sides of the sensing area. devices and light sensors, which not only increases the number of parts, but also increases the difficulty and cost of product assembly

The higher the resolution, the more optical emission modules and optical sensing modules must be used, which will increase the cost and make the signal processing more complicated

[0004] It can be seen that the above-mentioned existing input device and position scanning method obviously still have inconvenience and defects in product structure, method and use, and need to be further improved urgently.

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and there is no suitable structure and method for general products and methods to solve the above-mentioned problems. This is obviously a problem that relevant industry players are eager to solve

Images