Phototonus input panel and display device having phototonus input mechanism

Abstract

The invention discloses a phototonus input panel and a display device having a phototonus input mechanism. The phototonus input panel comprises a first grid line for transmitting first grid signals; a second grid line for transmitting second grid signals; a first bias line for transmitting first biases; a second bias line for transmitting second biases; a first phototonus module, a second phototonus module and a differential circuit. The first phototonus module is applied for providing a first reading signal according to the induction operations on a first incident light ray by the first grid signals, the second grid signals and the first bias. The second phototonus module is applied for providing a second reading signal according to the induction operations on a second incident light ray by the first grid signal, the second grid signal and the second bias. The differential circuit is applied for executing signal differential operations on the first reading signal and the second reading signal so as to generate an output signal.

Description

technical field [0001] The invention relates to an input panel and a display device with an input mechanism, in particular to a light-sensing input panel and a display device with a light-sensing input mechanism. Background technique [0002] In recent years, electronic products with a panel input mechanism have become a popular product trend. Using a display device with an input mechanism as a communication interface between the user and the electronic product allows the user to directly control the operation of the electronic product through the display device, and No keyboard or mouse required. The input mechanism of the display device can be divided into a light-sensing input mechanism and a touch input mechanism. Since the touch input mechanism will easily damage the device due to frequent panel touches, the light-sensing input mechanism has a long service life. Life expectancy has become a technology adopted by more people. Generally speaking, a display device with a...

AI Technical Summary

Problems solved by technology

Generally speaking, a display device with a light-sensing input mechanism includes multiple readout lines for transmitting multiple readout signals, and multiple data lines for transmitting multiple data signals. Since the data lines are substantially parallel to the readout lines, the data The data signal transmitted by the line will significantly interfere with the readout signal of the readout line, in addition, the background light will affect the voltage value of the readout signal

Therefore, in order to avoid the misjudgment of the input state due to the interference of the data signal and the background light, the input state is usually judged based on the differential signal generated by subtracting the two readout signals of adjacent readout lines. The light intensity in the light-affected area has a Gaussian distribution, so the differential signal based on judging the input state may not be correctly identified because the voltage value is too small

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