OLED display panel and OLED display device applying it

An OLED display panel, comprising:

• an array substrate which is covered by a cathode,
• a color filter substrate on which an auxiliary electrode is formed,
• a contact structure provided between the color filter substrate and the array substrate,
• wherein the contact structure is configured to electrically connect the cathode and the auxiliary electrode, and the contacting area between the contact structure and the array substrate is greater than or equal to that between the auxiliary electrode and the contact structure, and the contact structure is in contact with the auxiliary electrode and does not include the cathode,
• wherein the contact structure comprises a spacer and a transparent conductive film on the color filter substrate;
• the spacer is formed on the auxiliary electrode;
• and the transparent conductive film covers a surface of the color filter substrate and covers at least a surface of the spacer and the auxiliary electrode not blocked by the spacer;
• a pixel defining layer of the array substrate has a depressed section at a location corresponding to the spacer;
• the cathode further covers the surface inside the depressed section;
• and
• the spacer on the color filter substrate, whose surface is covered with the transparent conductive film, is inserted into the depressed section of the array substrate whose surface is covered with the cathode.