Touch control display panel

Abstract

The invention provides a touch-control display panel, comprising a first base plate, a second base plate and a liquid crystal layer. The first base plate comprises a plurality of sensing areas and a non-sensing area positioned outside the sensing areas, and each sensing area is internally provided with a first electrode. The second base plate comprises a plurality of main gap objects, a pluralityof sensing bumps, a plurality of first auxiliary gap objects and a plurality of second auxiliary gap objects; the main gap objects are connected to the non-sensing area of the first base plate; the sensing bumps are provided with a second electrode and corresponding to the sensing area, and maintain a sensing gap with the first base plate; the first auxiliary gap objects are corresponding to the non-sensing area and maintain a first auxiliary gap with the first base plate; the second auxiliary gap objects are corresponding to the non-sensing area and maintain a second auxiliary gap with the first base plate; the sensing gap is more than the first auxiliary gap and less than the second auxiliary gap.

Description

technical field [0001] The present invention relates to a touch display panel, and in particular to a built-in touch display panel. Background technique [0002] In recent years, with the rapid development of various applications such as information technology, wireless communication and information home appliances, in order to achieve more convenience, smaller volume and more humanization, the input devices of many information products have been replaced by traditional keyboards or slides. mouse etc. into a touch display panel (touch display panel). [0003] figure 1 A partial cross-sectional schematic diagram of a known touch display panel is shown. Please refer to figure 1 , the traditional touch display panel 100 includes a first substrate 110 , a second substrate 120 and a liquid crystal layer 130 . The second substrate 120 has main spacers 128 a , sensing bumps 128 b , auxiliary spacers 128 c and second electrodes 126 . The first substrate 110 has a sensing pad st...

AI Technical Summary

Problems solved by technology

[0005] However, the prior art has the following disadvantages: First, after multiple presses, the deformation of the main spacer 128a and the sensing bump 128b increases and the elastic restoring force becomes worse, causing the sensing gap Gs to shrink or even disappear, that is, , the first electrode 116 is in direct contact with the second electrode 126 at certain points, and this state will cause poor touch function or short circuit (touch function short), and in severe cases may also cause a touch on the top of the sensing bump 128b. The second electrode 126 is damaged

In other words, the aperture ratio of the panel itself will decrease, indirectly resulting in a decrease in light transmittance or an increase in the cost of the backlight module

[0008] Moreover, since the second electrode 126 on the sensing bump 128b has to be in contact with the first electrode 116 on the sensing pad structure 114b, the potential of the first electrode 116 changes to convert the touched position. Therefore, the first electrode The thickness of the alignment film material above 116 will also affect the minimum external force (activeforce) that can sense touch

The sensing pad height structure 114b known in the past is all formed by the differences in the stacking layers of the thin film transistor technology on the first substrate 110, so its height cannot be effectively improved.

Therefore, when the alignment film is transferred to the first substrate 110 by using APR (relief printing) method, the thickness of the remaining alignment film above the sensing pad structure 114b cannot be reduced due to the difference in height, which will affect the uniformity and The minimum external force required to sense the touch (active force)

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